Shareholder Report, Holdings (Details)	Jun. 30, 2026
C000025443 \| 754907103 \| Rayonier, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000025443 \| BSNMGT9 \| The Magnum Ice Cream Company N.V.
Holdings [Line Items]
Percent of Net Asset Value	7.40%
C000025443 \| 44891N208 \| People, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.30%
C000025443 \| BMJ1825 \| Exor N.V.
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000025443 \| 577081102 \| Mattel, Inc.
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000025443 \| 013091103 \| Albertsons Companies, Inc., Class A
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000025443 \| 12653C108 \| CNX Resources Corporation
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000025443 \| 34964C106 \| Fortune Brands Innovations, Inc.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000025443 \| 500754106 \| The Kraft Heinz Company
Holdings [Line Items]
Percent of Net Asset Value	4.70%
C000025443 \| 75886F107 \| Regeneron Pharmaceuticals, Inc.
Holdings [Line Items]
Percent of Net Asset Value	4.70%
C000025443 \| Energy
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000025443 \| Industrials
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000025443 \| Communications
Holdings [Line Items]
Percent of Net Asset Value	7.30%
C000025443 \| Real Estate
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000025443 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	9.70%
C000025443 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	13.10%
C000025443 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	18.80%
C000025443 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	18.80%
C000117771 \| 754907103 \| Rayonier, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000117771 \| BSNMGT9 \| The Magnum Ice Cream Company N.V.
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000117771 \| 44891N208 \| People, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.20%
C000117771 \| BMJ1825 \| Exor N.V.
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000117771 \| 577081102 \| Mattel, Inc.
Holdings [Line Items]
Percent of Net Asset Value	5.70%
C000117771 \| 013091103 \| Albertsons Companies, Inc., Class A
Holdings [Line Items]
Percent of Net Asset Value	4.70%
C000117771 \| 12653C108 \| CNX Resources Corporation
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000117771 \| 75886F107 \| Regeneron Pharmaceuticals, Inc.
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000117771 \| BRS9F13 \| Canal+ SA
Holdings [Line Items]
Percent of Net Asset Value	6.90%
C000117771 \| BDB6DD1 \| IDP Education Ltd.
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000117771 \| Japan
Holdings [Line Items]
Percent of Net Asset Value	1.30%
C000117771 \| Ireland
Holdings [Line Items]
Percent of Net Asset Value	2.70%
C000117771 \| Mexico
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000117771 \| Philippines
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000117771 \| Australia
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000117771 \| France
Holdings [Line Items]
Percent of Net Asset Value	6.90%
C000117771 \| Netherlands
Holdings [Line Items]
Percent of Net Asset Value	17.00%
C000117771 \| United States
Holdings [Line Items]
Percent of Net Asset Value	51.90%
C000117771 \| Energy
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000117771 \| Industrials
Holdings [Line Items]
Percent of Net Asset Value	3.70%
C000117771 \| Communications
Holdings [Line Items]
Percent of Net Asset Value	14.10%
C000117771 \| Real Estate
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000117771 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000117771 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	11.70%
C000117771 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	20.50%
C000117771 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	20.30%
C000025444 \| 754907103 \| Rayonier, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000025444 \| 577081102 \| Mattel, Inc.
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000025444 \| 12653C108 \| CNX Resources Corporation
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000025444 \| BYM4063 \| Becle S.A.B. de C.V.
Holdings [Line Items]
Percent of Net Asset Value	7.90%
C000025444 \| 292104106 \| Empire State Realty Trust, Inc., Class A
Holdings [Line Items]
Percent of Net Asset Value	7.30%
C000025444 \| 36164V800 \| Liberty Capital Corporation, Class C
Holdings [Line Items]
Percent of Net Asset Value	6.50%
C000025444 \| 82312B106 \| Shenandoah Telecommunications Company
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000025444 \| G9618E107 \| White Mountains Insurance Group Ltd.
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000025444 \| 047726302 \| Atlanta Braves Holdings, Inc., Class C
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000025444 \| 896945201 \| TripAdvisor, Inc.
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000025444 \| Energy
Holdings [Line Items]
Percent of Net Asset Value	6.20%
C000025444 \| Communications
Holdings [Line Items]
Percent of Net Asset Value	17.70%
C000025444 \| Real Estate
Holdings [Line Items]
Percent of Net Asset Value	19.30%
C000025444 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000025444 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	20.20%
C000025444 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	16.70%
C000025444 \| Materials
Holdings [Line Items]
Percent of Net Asset Value	3.80%