Shareholder Report, Holdings (Details) | Sep. 30, 2024 |
C000004396 | Atlantica Sustainable Infrastructure PLC8193370 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.90% |
C000004396 | Teck Resources, Ltd.8193349 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.80% |
C000004396 | RWE8193377 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.60% |
C000004396 | Clearway Energy, Inc.8193281 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.50% |
C000004396 | NextEra Energy, Inc.8193240 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.90% |
C000004396 | DS Smith PLC8193386 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.40% |
C000004396 | Jacobs Solutions, Inc.8193319 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.30% |
C000004396 | Brookfield Renewable Partners L.P.8193270 | |
Holdings [Line Items] | |
Percent of Total Investments | 4% |
C000004396 | Sunnova Energy International, Inc.8193243 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.90% |
C000004396 | Chart Industries, Inc.8193272 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.70% |
C000004396 | Exchange-Traded Fund | |
Holdings [Line Items] | |
Percent of Net Asset Value | (1.20%) |
C000004396 | Repurchase Agreement | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004396 | Warrants | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004396 | Other | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004396 | Rights | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
C000004396 | Cash Equivalent | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.90% |
C000004396 | Information Technology | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2% |
C000004396 | Consumer Discretionary | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.10% |
C000004396 | Convertible Bond | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4% |
C000004396 | Consumer Staples | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.10% |
C000004396 | Corporate Obligation | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.90% |
C000004396 | Industrials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.40% |
C000004396 | Energy | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.90% |
C000004396 | Materials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 16.80% |
C000004396 | Utilities | |
Holdings [Line Items] | |
Percent of Net Asset Value | 23.50% |
C000004398 | Atlantica Sustainable Infrastructure PLC8193370 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.90% |
C000004398 | Teck Resources, Ltd.8193349 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.80% |
C000004398 | RWE8193377 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.60% |
C000004398 | Clearway Energy, Inc.8193281 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.50% |
C000004398 | NextEra Energy, Inc.8193240 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.90% |
C000004398 | DS Smith PLC8193386 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.40% |
C000004398 | Jacobs Solutions, Inc.8193319 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.30% |
C000004398 | Brookfield Renewable Partners L.P.8193270 | |
Holdings [Line Items] | |
Percent of Total Investments | 4% |
C000004398 | Sunnova Energy International, Inc.8193243 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.90% |
C000004398 | Chart Industries, Inc.8193272 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.70% |
C000004398 | Exchange-Traded Fund | |
Holdings [Line Items] | |
Percent of Net Asset Value | (1.20%) |
C000004398 | Repurchase Agreement | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004398 | Warrants | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004398 | Other | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004398 | Rights | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
C000004398 | Cash Equivalent | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.90% |
C000004398 | Information Technology | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2% |
C000004398 | Consumer Discretionary | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.10% |
C000004398 | Convertible Bond | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4% |
C000004398 | Consumer Staples | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.10% |
C000004398 | Corporate Obligation | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.90% |
C000004398 | Industrials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.40% |
C000004398 | Energy | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.90% |
C000004398 | Materials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 16.80% |
C000004398 | Utilities | |
Holdings [Line Items] | |
Percent of Net Asset Value | 23.50% |
C000004399 | Atlantica Sustainable Infrastructure PLC8193370 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.90% |
C000004399 | Teck Resources, Ltd.8193349 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.80% |
C000004399 | RWE8193377 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.60% |
C000004399 | Clearway Energy, Inc.8193281 | |
Holdings [Line Items] | |
Percent of Total Investments | 5.50% |
C000004399 | NextEra Energy, Inc.8193240 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.90% |
C000004399 | DS Smith PLC8193386 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.40% |
C000004399 | Jacobs Solutions, Inc.8193319 | |
Holdings [Line Items] | |
Percent of Total Investments | 4.30% |
C000004399 | Brookfield Renewable Partners L.P.8193270 | |
Holdings [Line Items] | |
Percent of Total Investments | 4% |
C000004399 | Sunnova Energy International, Inc.8193243 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.90% |
C000004399 | Chart Industries, Inc.8193272 | |
Holdings [Line Items] | |
Percent of Total Investments | 3.70% |
C000004399 | Exchange-Traded Fund | |
Holdings [Line Items] | |
Percent of Net Asset Value | (1.20%) |
C000004399 | Repurchase Agreement | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004399 | Warrants | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004399 | Other | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0% |
C000004399 | Rights | |
Holdings [Line Items] | |
Percent of Net Asset Value | 0.10% |
C000004399 | Cash Equivalent | |
Holdings [Line Items] | |
Percent of Net Asset Value | 1.90% |
C000004399 | Information Technology | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2% |
C000004399 | Consumer Discretionary | |
Holdings [Line Items] | |
Percent of Net Asset Value | 2.10% |
C000004399 | Convertible Bond | |
Holdings [Line Items] | |
Percent of Net Asset Value | 4% |
C000004399 | Consumer Staples | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.10% |
C000004399 | Corporate Obligation | |
Holdings [Line Items] | |
Percent of Net Asset Value | 5.90% |
C000004399 | Industrials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 8.40% |
C000004399 | Energy | |
Holdings [Line Items] | |
Percent of Net Asset Value | 12.90% |
C000004399 | Materials | |
Holdings [Line Items] | |
Percent of Net Asset Value | 16.80% |
C000004399 | Utilities | |
Holdings [Line Items] | |
Percent of Net Asset Value | 23.50% |