Shareholder Report, Holdings (Details)	Dec. 31, 2025
C000032073 [Member]
Holdings [Line Items]
Percent of Net Asset Value	60.00%
C000032073 [Member] \| Torex Gold Resources Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| Royal Gold Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| OceanaGold Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| Kinross Gold Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| Endeavour Mining plc [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| IAMGold Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| Evolution Mining Ltd [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| DPM Metals Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000032073 [Member] \| Lundin Gold Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000032073 [Member] \| Agnico Eagle Mines Limited [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.00%
C000032073 [Member] \| Other Natural Resources Companies [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| Junior Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.00%
C000032073 [Member] \| Major Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.00%
C000032073 [Member] \| Intermediate Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	70.00%
C000032073 [Member] \| UNITED STATES
Holdings [Line Items]
Percent of Net Asset Value	76.00%
C000032073 [Member] \| CANADA
Holdings [Line Items]
Percent of Net Asset Value	14.00%
C000032073 [Member] \| AUSTRALIA
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000119766 [Member]
Holdings [Line Items]
Percent of Net Asset Value	110.00%
C000119766 [Member] \| Alphabet Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.00%
C000119766 [Member] \| Mastercard Incorporated Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000119766 [Member] \| JPMorgan Chase And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000119766 [Member] \| AutoZone Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000119766 [Member] \| Lam Research Corporation [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.00%
C000119766 [Member] \| Williams Sonoma Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000119766 [Member] \| Berkshire Hathaway Inc Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000119766 [Member] \| QUALCOMM Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000119766 [Member] \| Essent Group Ltd [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000119766 [Member] \| Interactive Brokers Group Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000119766 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	42.00%
C000119766 [Member] \| Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000119766 [Member] \| Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.00%
C000119766 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.00%
C000119766 [Member] \| Consumer Cyclical [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.00%
C000119766 [Member] \| UNITED STATES
Holdings [Line Items]
Percent of Net Asset Value	108.00%
C000119766 [Member] \| BERMUDA
Holdings [Line Items]
Percent of Net Asset Value	3.00%

C000032073 [Member]