Optimum Fixed Income Fund (OIFIX) N-CSRS3 Dec 24Certified semi-annual shareholder report (management investment company)Financial data

Company Profile

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
Form N-CSR Cover	Sep. 30, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Optimum Fund Trust
Entity Central Index Key	0001227523
Entity Investment Company Type	N-1A
Document Period End Date	Sep. 30, 2024

Shareholder Report

Shareholder Report	6 Months Ended
Shareholder Report	Sep. 30, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Optimum Fund Trust
Entity Central Index Key	0001227523
Entity Investment Company Type	N-1A
Document Period End Date	Sep. 30, 2024
C000006443 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Fixed Income Fund
Class Name	Class A
Trading Symbol	OAFIX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.04 % * Annualized
Expenses Paid, Amount	$ 53
Expense Ratio, Percent	1.04%	[1]
Net Assets	$ 2,766,778,737
Holdings Count \| Holding	1,397
Advisory Fees Paid, Amount	$ 6,714,615
Investment Company Portfolio Turnover	212%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 1,397 Total advisory fees paid $ Portfolio turnover rate 212 %
Holdings [Text Block]	Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Agency Mortgage-Backed Securities 39.56 % Corporate Bonds 32.60 % US Treasury Obligations 19.17 % Short-Term Investments 17.61 % Non-Agency Commercial Mortgage-Backed Securities 4.33 % Collateralized Debt Obligations 4.12 % Non-Agency Asset-Backed Securities 4.05 % Non-Agency Collateralized Mortgage Obligations 2.73 % Loan Agreements 2.08 % Sovereign Bonds 1.72 %
C000006445 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Fixed Income Fund
Class Name	Class C
Trading Symbol	OCFIX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 1.79 % * Annualized
Expenses Paid, Amount	$ 92
Expense Ratio, Percent	1.79%	[2]
Net Assets	$ 2,766,778,737
Holdings Count \| Holding	1,397
Advisory Fees Paid, Amount	$ 6,714,615
Investment Company Portfolio Turnover	212%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 1,397 Total advisory fees paid $ Portfolio turnover rate 212 %
Holdings [Text Block]	Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Agency Mortgage-Backed Securities 39.56 % Corporate Bonds 32.60 % US Treasury Obligations 19.17 % Short-Term Investments 17.61 % Non-Agency Commercial Mortgage-Backed Securities 4.33 % Collateralized Debt Obligations 4.12 % Non-Agency Asset-Backed Securities 4.05 % Non-Agency Collateralized Mortgage Obligations 2.73 % Loan Agreements 2.08 % Sovereign Bonds 1.72 %
C000006446 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Fixed Income Fund
Class Name	Institutional Class
Trading Symbol	OIFIX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 0.79 % * Annualized
Expenses Paid, Amount	$ 41
Expense Ratio, Percent	0.79%	[3]
Net Assets	$ 2,766,778,737
Holdings Count \| Holding	1,397
Advisory Fees Paid, Amount	$ 6,714,615
Investment Company Portfolio Turnover	212%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 1,397 Total advisory fees paid $ Portfolio turnover rate 212 %
Holdings [Text Block]	Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Agency Mortgage-Backed Securities 39.56 % Corporate Bonds 32.60 % US Treasury Obligations 19.17 % Short-Term Investments 17.61 % Non-Agency Commercial Mortgage-Backed Securities 4.33 % Collateralized Debt Obligations 4.12 % Non-Agency Asset-Backed Securities 4.05 % Non-Agency Collateralized Mortgage Obligations 2.73 % Loan Agreements 2.08 % Sovereign Bonds 1.72 %
C000006447 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum International Fund
Class Name	Class A
Trading Symbol	OAIEX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.33 % * Annualized
Expenses Paid, Amount	$ 70
Expense Ratio, Percent	1.33%	[4]
Net Assets	$ 844,224,195
Holdings Count \| Holding	624
Advisory Fees Paid, Amount	$ 2,914,867
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 624 Total advisory fees paid $ Portfolio turnover rate 26 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Japan 11.31 % China 10.37 % Taiwan 7.35 % Switzerland 6.45 % Germany 5.67 % Netherlands 5.02 % India 4.67 % Ireland 4.64 % Denmark 4.61 % France 4.18 % Sector allocation Information Technology 20.61 % Financials 19.79 % Industrials 18.10 % Consumer Discretionary 11.17 % Communication Services 8.18 % Healthcare 6.74 % Materials 4.81 % Energy 4.66 % Consumer Staples 3.28 % Utilities 0.78 % Real Estate 0.77 % Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
Largest Holdings [Text Block]	Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
C000006449 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum International Fund
Class Name	Class C
Trading Symbol	OCIEX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 2.08 % * Annualized
Expenses Paid, Amount	$ 109
Expense Ratio, Percent	2.08%	[5]
Net Assets	$ 844,224,195
Holdings Count \| Holding	624
Advisory Fees Paid, Amount	$ 2,914,867
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 624 Total advisory fees paid $ Portfolio turnover rate 26 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Japan 11.31 % China 10.37 % Taiwan 7.35 % Switzerland 6.45 % Germany 5.67 % Netherlands 5.02 % India 4.67 % Ireland 4.64 % Denmark 4.61 % France 4.18 % Sector allocation Information Technology 20.61 % Financials 19.79 % Industrials 18.10 % Consumer Discretionary 11.17 % Communication Services 8.18 % Healthcare 6.74 % Materials 4.81 % Energy 4.66 % Consumer Staples 3.28 % Utilities 0.78 % Real Estate 0.77 % Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
Largest Holdings [Text Block]	Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
C000006450 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum International Fund
Class Name	Institutional Class
Trading Symbol	OIIEX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 1.08 % * Annualized
Expenses Paid, Amount	$ 57
Expense Ratio, Percent	1.08%	[6]
Net Assets	$ 844,224,195
Holdings Count \| Holding	624
Advisory Fees Paid, Amount	$ 2,914,867
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 624 Total advisory fees paid $ Portfolio turnover rate 26 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Japan 11.31 % China 10.37 % Taiwan 7.35 % Switzerland 6.45 % Germany 5.67 % Netherlands 5.02 % India 4.67 % Ireland 4.64 % Denmark 4.61 % France 4.18 % Sector allocation Information Technology 20.61 % Financials 19.79 % Industrials 18.10 % Consumer Discretionary 11.17 % Communication Services 8.18 % Healthcare 6.74 % Materials 4.81 % Energy 4.66 % Consumer Staples 3.28 % Utilities 0.78 % Real Estate 0.77 % Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
Largest Holdings [Text Block]	Top 10 equity holdings Taiwan Semiconductor Manufacturing 3.21 % MercadoLibre 2.26 % Roche Holding 1.94 % Tencent Holdings 1.70 % Deutsche Boerse 1.37 % Experian 1.36 % Recruit Holdings 1.34 % Spotify Technology 1.32 % Novo Nordisk Class B 1.32 % China Construction Bank Class H 1.30 %
C000006451 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Growth Fund
Class Name	Class A
Trading Symbol	OALGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.21 % * Annualized
Expenses Paid, Amount	$ 64
Expense Ratio, Percent	1.21%	[7]
Net Assets	$ 2,065,306,952
Holdings Count \| Holding	138
Advisory Fees Paid, Amount	$ 6,784,736
Investment Company Portfolio Turnover	24%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 138 Total advisory fees paid $ Portfolio turnover rate 24 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Information Technology 47.02 % Communication Services 12.87 % Consumer Discretionary 12.64 % Healthcare 9.16 % Financials 7.77 % Industrials 4.98 % Consumer Staples 2.84 % Materials 0.72 % Real Estate 0.60 % Energy 0.54 % Utilities 0.21 % Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 % Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance purposes.
Largest Holdings [Text Block]	Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 %
C000006453 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Growth Fund
Class Name	Class C
Trading Symbol	OCLGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 1.96 % * Annualized
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	1.96%	[8]
Net Assets	$ 2,065,306,952
Holdings Count \| Holding	138
Advisory Fees Paid, Amount	$ 6,784,736
Investment Company Portfolio Turnover	24%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 138 Total advisory fees paid $ Portfolio turnover rate 24 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Information Technology 47.02 % Communication Services 12.87 % Consumer Discretionary 12.64 % Healthcare 9.16 % Financials 7.77 % Industrials 4.98 % Consumer Staples 2.84 % Materials 0.72 % Real Estate 0.60 % Energy 0.54 % Utilities 0.21 % Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 % Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance purposes.
Largest Holdings [Text Block]	Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 %
C000006454 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Growth Fund
Class Name	Institutional Class
Trading Symbol	OILGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 0.96 % * Annualized
Expenses Paid, Amount	$ 51
Expense Ratio, Percent	0.96%	[9]
Net Assets	$ 2,065,306,952
Holdings Count \| Holding	138
Advisory Fees Paid, Amount	$ 6,784,736
Investment Company Portfolio Turnover	24%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 138 Total advisory fees paid $ Portfolio turnover rate 24 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Information Technology 47.02 % Communication Services 12.87 % Consumer Discretionary 12.64 % Healthcare 9.16 % Financials 7.77 % Industrials 4.98 % Consumer Staples 2.84 % Materials 0.72 % Real Estate 0.60 % Energy 0.54 % Utilities 0.21 % Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 % Categorizations used for financial reporting purposes may differ from categorizations used for regulatory compliance purposes.
Largest Holdings [Text Block]	Top 10 equity holdings Apple 12.22 % NVIDIA 10.94 % Microsoft 8.82 % Amazon.com 5.99 % Meta Platforms Class A 4.05 % Alphabet Class A 3.22 % Alphabet Class C 3.17 % Eli Lilly & Co. 2.88 % Mastercard Class A 2.64 % Tesla 2.41 %
C000006455 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Value Fund
Class Name	Class A
Trading Symbol	OALVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.17 % * Annualized
Expenses Paid, Amount	$ 60
Expense Ratio, Percent	1.17%	[10]
Net Assets	$ 1,910,935,094
Holdings Count \| Holding	122
Advisory Fees Paid, Amount	$ 5,806,137
Investment Company Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 122 Total advisory fees paid $ Portfolio turnover rate 5 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.12 % Industrials 16.23 % Healthcare 16.00 % Information Technology 8.49 % Consumer Staples 6.83 % Energy 6.73 % Utilities 5.86 % Communication Services 3.96 % Materials 3.63 % Consumer Discretionary 3.58 % Real Estate 3.21 % Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
Largest Holdings [Text Block]	Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
C000006457 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Value Fund
Class Name	Class C
Trading Symbol	OCLVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 1.92 % * Annualized
Expenses Paid, Amount	$ 99
Expense Ratio, Percent	1.92%	[11]
Net Assets	$ 1,910,935,094
Holdings Count \| Holding	122
Advisory Fees Paid, Amount	$ 5,806,137
Investment Company Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 122 Total advisory fees paid $ Portfolio turnover rate 5 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.12 % Industrials 16.23 % Healthcare 16.00 % Information Technology 8.49 % Consumer Staples 6.83 % Energy 6.73 % Utilities 5.86 % Communication Services 3.96 % Materials 3.63 % Consumer Discretionary 3.58 % Real Estate 3.21 % Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
Largest Holdings [Text Block]	Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
C000006458 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Large Cap Value Fund
Class Name	Institutional Class
Trading Symbol	OILVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 0.92 % * Annualized
Expenses Paid, Amount	$ 48
Expense Ratio, Percent	0.92%	[12]
Net Assets	$ 1,910,935,094
Holdings Count \| Holding	122
Advisory Fees Paid, Amount	$ 5,806,137
Investment Company Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 122 Total advisory fees paid $ Portfolio turnover rate 5 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.12 % Industrials 16.23 % Healthcare 16.00 % Information Technology 8.49 % Consumer Staples 6.83 % Energy 6.73 % Utilities 5.86 % Communication Services 3.96 % Materials 3.63 % Consumer Discretionary 3.58 % Real Estate 3.21 % Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
Largest Holdings [Text Block]	Top 10 equity holdings JPMorgan Chase & Co. 4.00 % Exxon Mobil 2.26 % Lowe's 2.01 % Progressive 1.94 % RTX 1.91 % Duke Energy 1.85 % ConocoPhillips 1.79 % American Express 1.65 % Johnson & Johnson 1.65 % AbbVie 1.63 %
C000006459 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Growth Fund
Class Name	Class A
Trading Symbol	OASGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.52 % * Annualized
Expenses Paid, Amount	$ 77
Expense Ratio, Percent	1.52%	[13]
Net Assets	$ 748,184,123
Holdings Count \| Holding	196
Advisory Fees Paid, Amount	$ 3,518,881
Investment Company Portfolio Turnover	64%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 196 Total advisory fees paid $ Portfolio turnover rate 64 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Industrials 22.39 % Healthcare 21.14 % Information Technology 20.08 % Financials 13.03 % Consumer Discretionary 11.71 % Consumer Staples 3.40 % Materials 2.35 % Real Estate 1.97 % Energy 1.87 % Communication Services 1.08 % Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
Largest Holdings [Text Block]	Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
C000006461 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Growth Fund
Class Name	Class C
Trading Symbol	OCSGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 2.27 % * Annualized
Expenses Paid, Amount	$ 115
Expense Ratio, Percent	2.27%	[14]
Net Assets	$ 748,184,123
Holdings Count \| Holding	196
Advisory Fees Paid, Amount	$ 3,518,881
Investment Company Portfolio Turnover	64%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 196 Total advisory fees paid $ Portfolio turnover rate 64 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Industrials 22.39 % Healthcare 21.14 % Information Technology 20.08 % Financials 13.03 % Consumer Discretionary 11.71 % Consumer Staples 3.40 % Materials 2.35 % Real Estate 1.97 % Energy 1.87 % Communication Services 1.08 % Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
Largest Holdings [Text Block]	Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
C000006462 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Growth Fund
Class Name	Institutional Class
Trading Symbol	OISGX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 1.27 % * Annualized
Expenses Paid, Amount	$ 65
Expense Ratio, Percent	1.27%	[15]
Net Assets	$ 748,184,123
Holdings Count \| Holding	196
Advisory Fees Paid, Amount	$ 3,518,881
Investment Company Portfolio Turnover	64%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 196 Total advisory fees paid $ Portfolio turnover rate 64 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Industrials 22.39 % Healthcare 21.14 % Information Technology 20.08 % Financials 13.03 % Consumer Discretionary 11.71 % Consumer Staples 3.40 % Materials 2.35 % Real Estate 1.97 % Energy 1.87 % Communication Services 1.08 % Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
Largest Holdings [Text Block]	Top 10 equity holdings Avantor 2.06 % SiTime 1.42 % PennyMac Financial Services 1.40 % Churchill Downs 1.39 % Monday.com 1.32 % Jones Lang LaSalle 1.27 % Matador Resources 1.25 % Meritage Homes 1.10 % Lazard 1.10 % XPO 1.08 %
C000006463 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Value Fund
Class Name	Class A
Trading Symbol	OASVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class A $ 1.42 % * Annualized
Expenses Paid, Amount	$ 72
Expense Ratio, Percent	1.42%	[16]
Net Assets	$ 695,083,258
Holdings Count \| Holding	240
Advisory Fees Paid, Amount	$ 2,823,011
Investment Company Portfolio Turnover	68%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 240 Total advisory fees paid $ Portfolio turnover rate 68 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.71 % Industrials 18.19 % Consumer Discretionary 14.29 % Information Technology 8.91 % Materials 7.18 % Real Estate 7.06 % Healthcare 5.47 % Energy 4.89 % Consumer Staples 3.92 % Utilities 2.82 % Communication Services 1.83 % Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %
Largest Holdings [Text Block]	Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %
C000006465 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Value Fund
Class Name	Class C
Trading Symbol	OCSVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class C $ 2.17 % * Annualized
Expenses Paid, Amount	$ 110
Expense Ratio, Percent	2.17%	[17]
Net Assets	$ 695,083,258
Holdings Count \| Holding	240
Advisory Fees Paid, Amount	$ 2,823,011
Investment Company Portfolio Turnover	68%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 240 Total advisory fees paid $ Portfolio turnover rate 68 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.71 % Industrials 18.19 % Consumer Discretionary 14.29 % Information Technology 8.91 % Materials 7.18 % Real Estate 7.06 % Healthcare 5.47 % Energy 4.89 % Consumer Staples 3.92 % Utilities 2.82 % Communication Services 1.83 % Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %
Largest Holdings [Text Block]	Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %
C000006466 [Member]
Shareholder Report [Line Items]
Fund Name	Optimum Small-Mid Cap Value Fund
Class Name	Institutional Class
Trading Symbol	OISVX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report April 1, 2024,
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at optimummutualfunds.com/literature. You can also request this information by contacting us at 800 914-0278, weekdays from 8:30am to 6:00pm ET.
Additional Information Phone Number	800 914-0278
Additional Information Website	optimummutualfunds.com/literature
Expenses [Text Block]	What were the Fund's costs for the last six months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Institutional Class $ 1.17 % * Annualized
Expenses Paid, Amount	$ 60
Expense Ratio, Percent	1.17%	[18]
Net Assets	$ 695,083,258
Holdings Count \| Holding	240
Advisory Fees Paid, Amount	$ 2,823,011
Investment Company Portfolio Turnover	68%
Additional Fund Statistics [Text Block]	Fund statistics Fund net assets $ Total number of portfolio holdings 240 Total advisory fees paid $ Portfolio turnover rate 68 %
Holdings [Text Block]	Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Sector allocation Financials 24.71 % Industrials 18.19 % Consumer Discretionary 14.29 % Information Technology 8.91 % Materials 7.18 % Real Estate 7.06 % Healthcare 5.47 % Energy 4.89 % Consumer Staples 3.92 % Utilities 2.82 % Communication Services 1.83 % Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %
Largest Holdings [Text Block]	Top 10 equity holdings Reliance 1.75 % Kemper 1.65 % Boise Cascade 1.63 % EQT 1.58 % US Foods Holding 1.53 % Fortune Brands Innovations 1.49 % Everest Group 1.49 % Brixmor Property Group 1.47 % Camden Property Trust 1.36 % TPG 1.33 %

[1]Annualized[2]Annualized[3]Annualized[4]Annualized[5]Annualized[6]Annualized[7]Annualized[8]Annualized[9]Annualized[10]Annualized[11]Annualized[12]Annualized[13]Annualized[14]Annualized[15]Annualized[16]Annualized[17]Annualized[18]Annualized

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Sep. 30, 2024
C000006443 [Member] \| Collateralized Debt Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.12%
C000006443 [Member] \| Corporate Bond Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.60%
C000006443 [Member] \| Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.61%
C000006443 [Member] \| Sovereign Debt [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.72%
C000006443 [Member] \| Agency Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	39.56%
C000006443 [Member] \| US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.17%
C000006443 [Member] \| Non Agency Commercial Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.33%
C000006443 [Member] \| Non Agency Asset Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006443 [Member] \| Loan Agreements [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.08%
C000006443 [Member] \| Non Agency Collateralized Mortgage Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.73%
C000006445 [Member] \| Collateralized Debt Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.12%
C000006445 [Member] \| Corporate Bond Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.60%
C000006445 [Member] \| Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.61%
C000006445 [Member] \| Sovereign Debt [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.72%
C000006445 [Member] \| Agency Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	39.56%
C000006445 [Member] \| US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.17%
C000006445 [Member] \| Non Agency Commercial Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.33%
C000006445 [Member] \| Non Agency Asset Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006445 [Member] \| Loan Agreements [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.08%
C000006445 [Member] \| Non Agency Collateralized Mortgage Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.73%
C000006446 [Member] \| Collateralized Debt Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.12%
C000006446 [Member] \| Corporate Bond Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.60%
C000006446 [Member] \| Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.61%
C000006446 [Member] \| Sovereign Debt [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.72%
C000006446 [Member] \| Agency Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	39.56%
C000006446 [Member] \| US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.17%
C000006446 [Member] \| Non Agency Commercial Mortgage Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.33%
C000006446 [Member] \| Non Agency Asset Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006446 [Member] \| Loan Agreements [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.08%
C000006446 [Member] \| Non Agency Collateralized Mortgage Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.73%
C000006447 [Member] \| Taiwan Semiconductor Manufacturing [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006447 [Member] \| MercadoLibre [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006447 [Member] \| Roche Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006447 [Member] \| Tencent Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000006447 [Member] \| Deutsche Boerse [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.37%
C000006447 [Member] \| Experian [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006447 [Member] \| Recruit Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.34%
C000006447 [Member] \| Spotify Technology [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006447 [Member] \| Novo Nordisk Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006447 [Member] \| China Construction Bank Class H [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
C000006447 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.81%
C000006447 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.78%
C000006447 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.18%
C000006447 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.17%
C000006447 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.28%
C000006447 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%
C000006447 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.61%
C000006447 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.66%
C000006447 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.79%
C000006447 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.74%
C000006447 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.77%
C000006447 [Member] \| SWITZERLAND
Holdings [Line Items]
Percent of Net Asset Value	6.45%
C000006447 [Member] \| CHINA
Holdings [Line Items]
Percent of Net Asset Value	10.37%
C000006447 [Member] \| TAIWAN
Holdings [Line Items]
Percent of Net Asset Value	7.35%
C000006447 [Member] \| GERMANY
Holdings [Line Items]
Percent of Net Asset Value	5.67%
C000006447 [Member] \| DENMARK
Holdings [Line Items]
Percent of Net Asset Value	4.61%
C000006447 [Member] \| FRANCE
Holdings [Line Items]
Percent of Net Asset Value	4.18%
C000006447 [Member] \| IRELAND
Holdings [Line Items]
Percent of Net Asset Value	4.64%
C000006447 [Member] \| INDIA
Holdings [Line Items]
Percent of Net Asset Value	4.67%
C000006447 [Member] \| JAPAN
Holdings [Line Items]
Percent of Net Asset Value	11.31%
C000006447 [Member] \| NETHERLANDS
Holdings [Line Items]
Percent of Net Asset Value	5.02%
C000006449 [Member] \| Taiwan Semiconductor Manufacturing [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006449 [Member] \| MercadoLibre [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006449 [Member] \| Roche Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006449 [Member] \| Tencent Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000006449 [Member] \| Deutsche Boerse [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.37%
C000006449 [Member] \| Experian [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006449 [Member] \| Recruit Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.34%
C000006449 [Member] \| Spotify Technology [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006449 [Member] \| Novo Nordisk Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006449 [Member] \| China Construction Bank Class H [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
C000006449 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.81%
C000006449 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.78%
C000006449 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.18%
C000006449 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.17%
C000006449 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.28%
C000006449 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%
C000006449 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.61%
C000006449 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.66%
C000006449 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.79%
C000006449 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.74%
C000006449 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.77%
C000006449 [Member] \| SWITZERLAND
Holdings [Line Items]
Percent of Net Asset Value	6.45%
C000006449 [Member] \| CHINA
Holdings [Line Items]
Percent of Net Asset Value	10.37%
C000006449 [Member] \| TAIWAN
Holdings [Line Items]
Percent of Net Asset Value	7.35%
C000006449 [Member] \| GERMANY
Holdings [Line Items]
Percent of Net Asset Value	5.67%
C000006449 [Member] \| DENMARK
Holdings [Line Items]
Percent of Net Asset Value	4.61%
C000006449 [Member] \| FRANCE
Holdings [Line Items]
Percent of Net Asset Value	4.18%
C000006449 [Member] \| IRELAND
Holdings [Line Items]
Percent of Net Asset Value	4.64%
C000006449 [Member] \| INDIA
Holdings [Line Items]
Percent of Net Asset Value	4.67%
C000006449 [Member] \| JAPAN
Holdings [Line Items]
Percent of Net Asset Value	11.31%
C000006449 [Member] \| NETHERLANDS
Holdings [Line Items]
Percent of Net Asset Value	5.02%
C000006450 [Member] \| Taiwan Semiconductor Manufacturing [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006450 [Member] \| MercadoLibre [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006450 [Member] \| Roche Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006450 [Member] \| Tencent Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000006450 [Member] \| Deutsche Boerse [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.37%
C000006450 [Member] \| Experian [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006450 [Member] \| Recruit Holdings [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.34%
C000006450 [Member] \| Spotify Technology [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006450 [Member] \| Novo Nordisk Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006450 [Member] \| China Construction Bank Class H [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
C000006450 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.81%
C000006450 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.78%
C000006450 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.18%
C000006450 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.17%
C000006450 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.28%
C000006450 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%
C000006450 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.61%
C000006450 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.66%
C000006450 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.79%
C000006450 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.74%
C000006450 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.77%
C000006450 [Member] \| SWITZERLAND
Holdings [Line Items]
Percent of Net Asset Value	6.45%
C000006450 [Member] \| CHINA
Holdings [Line Items]
Percent of Net Asset Value	10.37%
C000006450 [Member] \| TAIWAN
Holdings [Line Items]
Percent of Net Asset Value	7.35%
C000006450 [Member] \| GERMANY
Holdings [Line Items]
Percent of Net Asset Value	5.67%
C000006450 [Member] \| DENMARK
Holdings [Line Items]
Percent of Net Asset Value	4.61%
C000006450 [Member] \| FRANCE
Holdings [Line Items]
Percent of Net Asset Value	4.18%
C000006450 [Member] \| IRELAND
Holdings [Line Items]
Percent of Net Asset Value	4.64%
C000006450 [Member] \| INDIA
Holdings [Line Items]
Percent of Net Asset Value	4.67%
C000006450 [Member] \| JAPAN
Holdings [Line Items]
Percent of Net Asset Value	11.31%
C000006450 [Member] \| NETHERLANDS
Holdings [Line Items]
Percent of Net Asset Value	5.02%
C000006451 [Member] \| Apple [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.22%
C000006451 [Member] \| NVIDIA [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.94%
C000006451 [Member] \| Microsoft [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.82%
C000006451 [Member] \| Amazon com [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.99%
C000006451 [Member] \| Meta Platforms Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006451 [Member] \| Alphabet Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.22%
C000006451 [Member] \| Alphabet Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.17%
C000006451 [Member] \| Eli Lilly And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.88%
C000006451 [Member] \| Mastercard Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.64%
C000006451 [Member] \| Tesla [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.41%
C000006451 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.72%
C000006451 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.21%
C000006451 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.87%
C000006451 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.64%
C000006451 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.84%
C000006451 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.98%
C000006451 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	47.02%
C000006451 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.54%
C000006451 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.77%
C000006451 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.16%
C000006451 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%
C000006453 [Member] \| Apple [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.22%
C000006453 [Member] \| NVIDIA [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.94%
C000006453 [Member] \| Microsoft [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.82%
C000006453 [Member] \| Amazon com [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.99%
C000006453 [Member] \| Meta Platforms Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006453 [Member] \| Alphabet Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.22%
C000006453 [Member] \| Alphabet Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.17%
C000006453 [Member] \| Eli Lilly And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.88%
C000006453 [Member] \| Mastercard Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.64%
C000006453 [Member] \| Tesla [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.41%
C000006453 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.72%
C000006453 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.21%
C000006453 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.87%
C000006453 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.64%
C000006453 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.84%
C000006453 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.98%
C000006453 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	47.02%
C000006453 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.54%
C000006453 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.77%
C000006453 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.16%
C000006453 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%
C000006454 [Member] \| Apple [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.22%
C000006454 [Member] \| NVIDIA [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.94%
C000006454 [Member] \| Microsoft [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.82%
C000006454 [Member] \| Amazon com [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.99%
C000006454 [Member] \| Meta Platforms Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.05%
C000006454 [Member] \| Alphabet Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.22%
C000006454 [Member] \| Alphabet Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.17%
C000006454 [Member] \| Eli Lilly And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.88%
C000006454 [Member] \| Mastercard Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.64%
C000006454 [Member] \| Tesla [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.41%
C000006454 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.72%
C000006454 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.21%
C000006454 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.87%
C000006454 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.64%
C000006454 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.84%
C000006454 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.98%
C000006454 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	47.02%
C000006454 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.54%
C000006454 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.77%
C000006454 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.16%
C000006454 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%
C000006455 [Member] \| JPMorgan Chase And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	4%
C000006455 [Member] \| Exxon Mobil [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006455 [Member] \| Lowe s [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.01%
C000006455 [Member] \| Progressive [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006455 [Member] \| RTX [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.91%
C000006455 [Member] \| Duke Energy [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.85%
C000006455 [Member] \| ConocoPhillips [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.79%
C000006455 [Member] \| American Express [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006455 [Member] \| Johnson And Johnson [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006455 [Member] \| AbbVie [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006455 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.63%
C000006455 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.86%
C000006455 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.96%
C000006455 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.58%
C000006455 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.83%
C000006455 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.23%
C000006455 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.49%
C000006455 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.73%
C000006455 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.12%
C000006455 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16%
C000006455 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006457 [Member] \| JPMorgan Chase And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	4%
C000006457 [Member] \| Exxon Mobil [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006457 [Member] \| Lowe s [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.01%
C000006457 [Member] \| Progressive [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006457 [Member] \| RTX [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.91%
C000006457 [Member] \| Duke Energy [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.85%
C000006457 [Member] \| ConocoPhillips [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.79%
C000006457 [Member] \| American Express [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006457 [Member] \| Johnson And Johnson [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006457 [Member] \| AbbVie [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006457 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.63%
C000006457 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.86%
C000006457 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.96%
C000006457 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.58%
C000006457 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.83%
C000006457 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.23%
C000006457 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.49%
C000006457 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.73%
C000006457 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.12%
C000006457 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16%
C000006457 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006458 [Member] \| JPMorgan Chase And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	4%
C000006458 [Member] \| Exxon Mobil [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.26%
C000006458 [Member] \| Lowe s [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.01%
C000006458 [Member] \| Progressive [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.94%
C000006458 [Member] \| RTX [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.91%
C000006458 [Member] \| Duke Energy [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.85%
C000006458 [Member] \| ConocoPhillips [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.79%
C000006458 [Member] \| American Express [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006458 [Member] \| Johnson And Johnson [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006458 [Member] \| AbbVie [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006458 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.63%
C000006458 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.86%
C000006458 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.96%
C000006458 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.58%
C000006458 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.83%
C000006458 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.23%
C000006458 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.49%
C000006458 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.73%
C000006458 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.12%
C000006458 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	16%
C000006458 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.21%
C000006459 [Member] \| Avantor [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.06%
C000006459 [Member] \| SiTime [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.42%
C000006459 [Member] \| PennyMac Financial Services [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
C000006459 [Member] \| Churchill Downs [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.39%
C000006459 [Member] \| Monday com [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006459 [Member] \| Jones Lang LaSalle [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.27%
C000006459 [Member] \| Matador Resources [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.25%
C000006459 [Member] \| Meritage Homes [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006459 [Member] \| Lazard [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006459 [Member] \| XPO [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006459 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.35%
C000006459 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006459 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.71%
C000006459 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000006459 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.39%
C000006459 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.08%
C000006459 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.87%
C000006459 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.03%
C000006459 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.14%
C000006459 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.97%
C000006461 [Member] \| Avantor [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.06%
C000006461 [Member] \| SiTime [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.42%
C000006461 [Member] \| PennyMac Financial Services [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
C000006461 [Member] \| Churchill Downs [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.39%
C000006461 [Member] \| Monday com [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006461 [Member] \| Jones Lang LaSalle [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.27%
C000006461 [Member] \| Matador Resources [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.25%
C000006461 [Member] \| Meritage Homes [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006461 [Member] \| Lazard [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006461 [Member] \| XPO [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006461 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.35%
C000006461 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006461 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.71%
C000006461 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000006461 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.39%
C000006461 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.08%
C000006461 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.87%
C000006461 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.03%
C000006461 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.14%
C000006461 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.97%
C000006462 [Member] \| Avantor [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.06%
C000006462 [Member] \| SiTime [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.42%
C000006462 [Member] \| PennyMac Financial Services [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
C000006462 [Member] \| Churchill Downs [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.39%
C000006462 [Member] \| Monday com [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.32%
C000006462 [Member] \| Jones Lang LaSalle [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.27%
C000006462 [Member] \| Matador Resources [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.25%
C000006462 [Member] \| Meritage Homes [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006462 [Member] \| Lazard [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
C000006462 [Member] \| XPO [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006462 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.35%
C000006462 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.08%
C000006462 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.71%
C000006462 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000006462 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.39%
C000006462 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.08%
C000006462 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.87%
C000006462 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.03%
C000006462 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.14%
C000006462 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.97%
C000006463 [Member] \| Reliance [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.75%
C000006463 [Member] \| Kemper [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006463 [Member] \| Boise Cascade [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006463 [Member] \| EQT [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.58%
C000006463 [Member] \| US Foods Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.53%
C000006463 [Member] \| Fortune Brands Innovations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006463 [Member] \| Everest Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006463 [Member] \| Brixmor Property Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.47%
C000006463 [Member] \| Camden Property Trust [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006463 [Member] \| TPG [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.33%
C000006463 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.18%
C000006463 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.82%
C000006463 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.83%
C000006463 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.29%
C000006463 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.92%
C000006463 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.19%
C000006463 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.91%
C000006463 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.89%
C000006463 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.71%
C000006463 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.47%
C000006463 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.06%
C000006465 [Member] \| Reliance [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.75%
C000006465 [Member] \| Kemper [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006465 [Member] \| Boise Cascade [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006465 [Member] \| EQT [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.58%
C000006465 [Member] \| US Foods Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.53%
C000006465 [Member] \| Fortune Brands Innovations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006465 [Member] \| Everest Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006465 [Member] \| Brixmor Property Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.47%
C000006465 [Member] \| Camden Property Trust [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006465 [Member] \| TPG [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.33%
C000006465 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.18%
C000006465 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.82%
C000006465 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.83%
C000006465 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.29%
C000006465 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.92%
C000006465 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.19%
C000006465 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.91%
C000006465 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.89%
C000006465 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.71%
C000006465 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.47%
C000006465 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.06%
C000006466 [Member] \| Reliance [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.75%
C000006466 [Member] \| Kemper [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.65%
C000006466 [Member] \| Boise Cascade [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.63%
C000006466 [Member] \| EQT [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.58%
C000006466 [Member] \| US Foods Holding [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.53%
C000006466 [Member] \| Fortune Brands Innovations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006466 [Member] \| Everest Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.49%
C000006466 [Member] \| Brixmor Property Group [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.47%
C000006466 [Member] \| Camden Property Trust [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.36%
C000006466 [Member] \| TPG [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.33%
C000006466 [Member] \| Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.18%
C000006466 [Member] \| Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.82%
C000006466 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.83%
C000006466 [Member] \| Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.29%
C000006466 [Member] \| Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.92%
C000006466 [Member] \| Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.19%
C000006466 [Member] \| Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.91%
C000006466 [Member] \| Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.89%
C000006466 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.71%
C000006466 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.47%
C000006466 [Member] \| Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.06%