The Gabelli Value 25 Fund Inc. Class AAA (GVCAX) N-CSRS6 Sep 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	Jun. 30, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Gabelli Value 25 Fund Inc
Entity Central Index Key	0000853438
Entity Investment Company Type	N-1A
Document Period End Date	Jun. 30, 2024

Shareholder Report

Shareholder Report	6 Months Ended
Shareholder Report	Jun. 30, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Gabelli Value 25 Fund Inc
Entity Central Index Key	0000853438
Entity Investment Company Type	N-1A
Document Period End Date	Jun. 30, 2024
C000088645
Shareholder Report [Line Items]
Fund Name	The Gabelli Value 25 Fund Inc.
Class Name	Class AAA
Trading Symbol	GVCAX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at www.gabelli.com
Additional Information Phone Number	800-GABELLI (800-422-3554)
Additional Information Website	www.gabelli.com</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class AAA $75 1.49%
Expenses Paid, Amount	$ 75
Expense Ratio, Percent	1.49%
Factors Affecting Performance [Text Block]	How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments.
Performance Past Does Not Indicate Future [Text]	Past performance does not guarantee future results.
Line Graph [Table Text Block]	The Gabelli Value 25 Fund Inc. - Class AAA S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,941 10,742 10,413 6/16 9,564 11,171 10,711 6/17 10,813 13,170 12,374 6/18 11,460 15,063 13,212 6/19 11,937 16,632 14,330 6/20 10,279 17,881 13,063 6/21 14,992 25,175 18,769 6/22 12,369 22,501 17,489 6/23 13,167 26,910 19,507 6/24 14,002 33,519 22,055
Average Annual Return [Table Text Block]	Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class AAA 3.07% 6.35% 3.24% 3.43% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23%
No Deduction of Taxes [Text Block]	The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares.
Performance Table Market Index Changed [Text Block]
Updated Performance Information Location [Text Block]	Updated Location: Visit www.confluence.com/funds for more recent performance information.
AssetsNet	$ 206,747,245
Holdings Count \| Holding	72
Advisory Fees Paid, Amount	$ 1,016,075
InvestmentCompanyPortfolioTurnover	3%
Additional Fund Statistics [Text Block]	Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075
Holdings [Text Block]	Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0%
Largest Holdings [Text Block]	Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	800-GABELLI (800-422-3554)
Updated Prospectus Email Address	info@gabelli.com</span>" id="sjs-B39"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span>
Updated Prospectus Web Address	www.gabelli.com</span>" id="sjs-B40"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
C000002904
Shareholder Report [Line Items]
Fund Name	The Gabelli Value 25 Fund Inc.
Class Name	Class C
Trading Symbol	GVCCX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at www.gabelli.com
Additional Information Phone Number	800-GABELLI (800-422-3554)
Additional Information Website	www.gabelli.com</span>" id="sjs-B50"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class C $113 2.24%
Expenses Paid, Amount	$ 113
Expense Ratio, Percent	2.24%
Factors Affecting Performance [Text Block]	How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments.
Performance Past Does Not Indicate Future [Text]	Past performance does not guarantee future results.
Line Graph [Table Text Block]	The Gabelli Value 25 Fund Inc. - Class C S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,773 10,742 10,413 6/16 9,242 11,171 10,711 6/17 10,273 13,170 12,374 6/18 10,701 15,063 13,212 6/19 10,956 16,632 14,330 6/20 9,273 17,881 13,063 6/21 13,341 25,175 18,769 6/22 10,805 22,501 17,489 6/23 11,322 26,910 19,507 6/24 11,837 33,519 22,055
Average Annual Return [Table Text Block]	Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class C 1.71% 4.55% 2.50% 2.66% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23%
No Deduction of Taxes [Text Block]	The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares.
Performance Table Market Index Changed [Text Block]
Updated Performance Information Location [Text Block]	Updated Location: Visit www.confluence.com/funds for more recent performance information.
AssetsNet	$ 206,747,245
Holdings Count \| Holding	72
Advisory Fees Paid, Amount	$ 1,016,075
InvestmentCompanyPortfolioTurnover	3%
Additional Fund Statistics [Text Block]	Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075
Holdings [Text Block]	Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0%
Largest Holdings [Text Block]	Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	800-GABELLI (800-422-3554)
Updated Prospectus Email Address	info@gabelli.com</span>" id="sjs-B70"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span>
Updated Prospectus Web Address	www.gabelli.com</span>" id="sjs-B71"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
C000034316
Shareholder Report [Line Items]
Fund Name	The Gabelli Value 25 Fund Inc.
Class Name	Class I
Trading Symbol	GVCIX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at www.gabelli.com
Additional Information Phone Number	800-GABELLI (800-422-3554)
Additional Information Website	www.gabelli.com</span>" id="sjs-B81"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class I $51 1.00%
Expenses Paid, Amount	$ 51
Expense Ratio, Percent	1%
Factors Affecting Performance [Text Block]	How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments.
Performance Past Does Not Indicate Future [Text]	Past performance does not guarantee future results.
Line Graph [Table Text Block]	The Gabelli Value 25 Fund Inc. - Class I S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,967 10,742 10,413 6/16 9,614 11,171 10,711 6/17 10,905 13,170 12,374 6/18 11,608 15,063 13,212 6/19 12,139 16,632 14,330 6/20 10,502 17,881 13,063 6/21 15,386 25,175 18,769 6/22 12,750 22,501 17,489 6/23 13,623 26,910 19,507 6/24 14,571 33,519 22,055
Average Annual Return [Table Text Block]	Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class I 3.28% 6.96% 3.72% 3.84% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23%
No Deduction of Taxes [Text Block]	The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares.
Performance Table Market Index Changed [Text Block]
Updated Performance Information Location [Text Block]	Updated Location: Visit www.confluence.com/funds for more recent performance information.
AssetsNet	$ 206,747,245
Holdings Count \| Holding	72
Advisory Fees Paid, Amount	$ 1,016,075
InvestmentCompanyPortfolioTurnover	3%
Additional Fund Statistics [Text Block]	Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075
Holdings [Text Block]	Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0%
Largest Holdings [Text Block]	Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	800-GABELLI (800-422-3554)
Updated Prospectus Email Address	info@gabelli.com</span>" id="sjs-B101"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span>
Updated Prospectus Web Address	www.gabelli.com</span>" id="sjs-B102"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
C000002902
Shareholder Report [Line Items]
Fund Name	The Gabelli Value 25 Fund Inc.
Class Name	Class A
Trading Symbol	GABVX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024.
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at www.gabelli.com
Additional Information Phone Number	800-GABELLI (800-422-3554)
Additional Information Website	www.gabelli.com</span>" id="sjs-B112"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class A $75 1.49%
Expenses Paid, Amount	$ 75
Expense Ratio, Percent	1.49%
Factors Affecting Performance [Text Block]	How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments.
Performance Past Does Not Indicate Future [Text]	Past performance does not guarantee future results.
Line Graph [Table Text Block]	The Gabelli Value 25 Fund Inc. - Class A S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,374 10,742 10,413 6/16 9,569 11,171 10,711 6/17 10,815 13,170 12,374 6/18 11,464 15,063 13,212 6/19 11,933 16,632 14,330 6/20 10,287 17,881 13,063 6/21 15,000 25,175 18,769 6/22 12,379 22,501 17,489 6/23 13,172 26,910 19,507 6/24 14,001 33,519 22,055
Average Annual Return [Table Text Block]	Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class A (2.98)% 0.18% 2.03% 2.81% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23%
No Deduction of Taxes [Text Block]	The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares.
Performance Table Market Index Changed [Text Block]
Updated Performance Information Location [Text Block]	Updated Location: Visit www.confluence.com/funds for more recent performance information.
AssetsNet	$ 206,747,245
Holdings Count \| Holding	72
Advisory Fees Paid, Amount	$ 1,016,075
InvestmentCompanyPortfolioTurnover	3%
Additional Fund Statistics [Text Block]	Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075
Holdings [Text Block]	Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0%
Largest Holdings [Text Block]	Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	800-GABELLI (800-422-3554)
Updated Prospectus Email Address	info@gabelli.com</span>" id="sjs-B132"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span>
Updated Prospectus Web Address	www.gabelli.com</span>" id="sjs-B133"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span>

Shareholder Report, Line Graph

Shareholder Report, Line Graph (Details) - USD ($)	6 Months Ended
Shareholder Report, Line Graph (Details) - USD ($)	Jun. 30, 2014	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
C000088645
Account Value [Line Items]
Line Graph and Table Measure Name	The Gabelli Value 25 Fund Inc. - Class AAA
C000002904
Account Value [Line Items]
Line Graph and Table Measure Name	The Gabelli Value 25 Fund Inc. - Class C
C000034316
Account Value [Line Items]
Line Graph and Table Measure Name	The Gabelli Value 25 Fund Inc. - Class I
C000002902
Account Value [Line Items]
Line Graph and Table Measure Name	The Gabelli Value 25 Fund Inc. - Class A
S&P 500 Index
Account Value [Line Items]
Account Value	$ 10,000	$ 33,519	$ 26,910	$ 22,501	$ 25,175	$ 17,881	$ 16,632	$ 15,063	$ 13,170	$ 11,171	$ 10,742
S&P 500 Index
Account Value [Line Items]
Account Value	10,000	33,519	26,910	22,501	25,175	17,881	16,632	15,063	13,170	11,171	10,742
S&P 500 Index
Account Value [Line Items]
Account Value	10,000	33,519	26,910	22,501	25,175	17,881	16,632	15,063	13,170	11,171	10,742
S&P 500 Index
Account Value [Line Items]
Account Value	$ 10,000	$ 33,519	$ 26,910	$ 22,501	$ 25,175	$ 17,881	$ 16,632	$ 15,063	$ 13,170	$ 11,171	$ 10,742

Shareholder Report, Average Ann

Shareholder Report, Average Annual Return (Details)	6 Months Ended		12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	Jun. 30, 2024	Jun. 30, 2014	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2024
C000088645
Average Annual Return [Line Items]
Line Graph and Table Measure Name		The Gabelli Value 25 Fund Inc. - Class AAA
C000002904
Average Annual Return [Line Items]
Line Graph and Table Measure Name		The Gabelli Value 25 Fund Inc. - Class C
Average Annual Return, Percent	1.71%		4.55%	2.50%	2.66%
C000034316
Average Annual Return [Line Items]
Line Graph and Table Measure Name		The Gabelli Value 25 Fund Inc. - Class I
C000002902
Average Annual Return [Line Items]
Line Graph and Table Measure Name		The Gabelli Value 25 Fund Inc. - Class A
Average Annual Return, Percent	(2.98%)		0.18%	2.03%	2.81%
Without Sales Load [Member] \| C000088645
Average Annual Return [Line Items]
Average Annual Return, Percent	3.07%		6.35%	3.24%	3.43%
Without Sales Load [Member] \| C000034316
Average Annual Return [Line Items]
Average Annual Return, Percent	3.28%		6.96%	3.72%	3.84%
S&P 500 Index
Average Annual Return [Line Items]
Average Annual Return, Percent	15.29%		24.56%	15.05%	12.86%
S&P 500 Index
Average Annual Return [Line Items]
Average Annual Return, Percent	15.29%		24.56%	15.05%	12.86%
S&P 500 Index
Average Annual Return [Line Items]
Average Annual Return, Percent	15.29%		24.56%	15.05%	12.86%
S&P 500 Index
Average Annual Return [Line Items]
Average Annual Return, Percent	15.29%		24.56%	15.05%	12.86%
Russell 1000 Value Index
Average Annual Return [Line Items]
Average Annual Return, Percent	6.62%		13.06%	9.01%	8.23%
Russell 1000 Value Index
Average Annual Return [Line Items]
Average Annual Return, Percent	6.62%		13.06%	9.01%	8.23%
Russell 1000 Value Index
Average Annual Return [Line Items]
Average Annual Return, Percent	6.62%		13.06%	9.01%	8.23%
Russell 1000 Value Index
Average Annual Return [Line Items]
Average Annual Return, Percent	6.62%		13.06%	9.01%	8.23%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Jun. 30, 2024
C000088645 \| Sony Group Corp.
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000088645 \| American Express Co.
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000088645 \| Republic Services Inc.
Holdings [Line Items]
Percent of Net Asset Value	5.50%
C000088645 \| Newmont Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000088645 \| The Bank of New York Mellon Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000088645 \| Madison Square Garden Sports Corp.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000088645 \| Crane Co.
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000088645 \| Paramount Global
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000088645 \| Genuine Parts Co.
Holdings [Line Items]
Percent of Net Asset Value	4%
C000088645 \| National Fuel Gas Co.
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000088645 \| InvestmentType_Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	99.10%
C000088645 \| InvestmentType_U.S. Government Obligations
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000088645 \| InvestmentType_Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000088645 \| Entertainment
Holdings [Line Items]
Percent of Net Asset Value	16%
C000088645 \| Financial Services
Holdings [Line Items]
Percent of Net Asset Value	14.60%
C000088645 \| Environmental Services
Holdings [Line Items]
Percent of Net Asset Value	7.90%
C000088645 \| Electronics
Holdings [Line Items]
Percent of Net Asset Value	7.50%
C000088645 \| Broadcasting
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000088645 \| Energy and Utilities
Holdings [Line Items]
Percent of Net Asset Value	6.50%
C000088645 \| Diversified Industrial
Holdings [Line Items]
Percent of Net Asset Value	5.90%
C000088645 \| Metals and Mining
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000088645 \| Other Industry sectors
Holdings [Line Items]
Percent of Net Asset Value	28.70%
C000088645 \| Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000002904 \| Sony Group Corp.
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000002904 \| American Express Co.
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000002904 \| Republic Services Inc.
Holdings [Line Items]
Percent of Net Asset Value	5.50%
C000002904 \| Newmont Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000002904 \| The Bank of New York Mellon Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000002904 \| Madison Square Garden Sports Corp.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000002904 \| Crane Co.
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000002904 \| Paramount Global
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000002904 \| Genuine Parts Co.
Holdings [Line Items]
Percent of Net Asset Value	4%
C000002904 \| National Fuel Gas Co.
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000002904 \| InvestmentType_Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	99.10%
C000002904 \| InvestmentType_U.S. Government Obligations
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000002904 \| InvestmentType_Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000002904 \| Entertainment
Holdings [Line Items]
Percent of Net Asset Value	16%
C000002904 \| Financial Services
Holdings [Line Items]
Percent of Net Asset Value	14.60%
C000002904 \| Environmental Services
Holdings [Line Items]
Percent of Net Asset Value	7.90%
C000002904 \| Electronics
Holdings [Line Items]
Percent of Net Asset Value	7.50%
C000002904 \| Broadcasting
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000002904 \| Energy and Utilities
Holdings [Line Items]
Percent of Net Asset Value	6.50%
C000002904 \| Diversified Industrial
Holdings [Line Items]
Percent of Net Asset Value	5.90%
C000002904 \| Metals and Mining
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000002904 \| Other Industry sectors
Holdings [Line Items]
Percent of Net Asset Value	28.70%
C000002904 \| Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000034316 \| Sony Group Corp.
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000034316 \| American Express Co.
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000034316 \| Republic Services Inc.
Holdings [Line Items]
Percent of Net Asset Value	5.50%
C000034316 \| Newmont Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000034316 \| The Bank of New York Mellon Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000034316 \| Madison Square Garden Sports Corp.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000034316 \| Crane Co.
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000034316 \| Paramount Global
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000034316 \| Genuine Parts Co.
Holdings [Line Items]
Percent of Net Asset Value	4%
C000034316 \| National Fuel Gas Co.
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000034316 \| InvestmentType_Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	99.10%
C000034316 \| InvestmentType_U.S. Government Obligations
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000034316 \| InvestmentType_Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000034316 \| Entertainment
Holdings [Line Items]
Percent of Net Asset Value	16%
C000034316 \| Financial Services
Holdings [Line Items]
Percent of Net Asset Value	14.60%
C000034316 \| Environmental Services
Holdings [Line Items]
Percent of Net Asset Value	7.90%
C000034316 \| Electronics
Holdings [Line Items]
Percent of Net Asset Value	7.50%
C000034316 \| Broadcasting
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000034316 \| Energy and Utilities
Holdings [Line Items]
Percent of Net Asset Value	6.50%
C000034316 \| Diversified Industrial
Holdings [Line Items]
Percent of Net Asset Value	5.90%
C000034316 \| Metals and Mining
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000034316 \| Other Industry sectors
Holdings [Line Items]
Percent of Net Asset Value	28.70%
C000034316 \| Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000002902 \| Sony Group Corp.
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000002902 \| American Express Co.
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000002902 \| Republic Services Inc.
Holdings [Line Items]
Percent of Net Asset Value	5.50%
C000002902 \| Newmont Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000002902 \| The Bank of New York Mellon Corp.
Holdings [Line Items]
Percent of Net Asset Value	5.30%
C000002902 \| Madison Square Garden Sports Corp.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000002902 \| Crane Co.
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000002902 \| Paramount Global
Holdings [Line Items]
Percent of Net Asset Value	4.30%
C000002902 \| Genuine Parts Co.
Holdings [Line Items]
Percent of Net Asset Value	4%
C000002902 \| National Fuel Gas Co.
Holdings [Line Items]
Percent of Net Asset Value	3.90%
C000002902 \| InvestmentType_Common Stocks
Holdings [Line Items]
Percent of Net Asset Value	99.10%
C000002902 \| InvestmentType_U.S. Government Obligations
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000002902 \| InvestmentType_Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%
C000002902 \| Entertainment
Holdings [Line Items]
Percent of Net Asset Value	16%
C000002902 \| Financial Services
Holdings [Line Items]
Percent of Net Asset Value	14.60%
C000002902 \| Environmental Services
Holdings [Line Items]
Percent of Net Asset Value	7.90%
C000002902 \| Electronics
Holdings [Line Items]
Percent of Net Asset Value	7.50%
C000002902 \| Broadcasting
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000002902 \| Energy and Utilities
Holdings [Line Items]
Percent of Net Asset Value	6.50%
C000002902 \| Diversified Industrial
Holdings [Line Items]
Percent of Net Asset Value	5.90%
C000002902 \| Metals and Mining
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000002902 \| Other Industry sectors
Holdings [Line Items]
Percent of Net Asset Value	28.70%
C000002902 \| Other Assets and Liabilities (Net)
Holdings [Line Items]
Percent of Net Asset Value	0%