v3.25.4
Shareholder Report, Line Graph (Details) - USD ($)
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C000005450                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value   $ 10,000   $ 9,271   $ 9,262   $ 10,132   $ 11,691   $ 12,047   $ 12,641   $ 13,254   $ 13,923   $ 14,181   $ 14,316   $ 14,405   $ 12,531   $ 13,787   $ 14,670   $ 15,226   $ 16,256   $ 11,143   $ 12,851   $ 13,047   $ 17,137   $ 20,552   $ 21,597   $ 22,483   $ 23,617   $ 22,987   $ 19,527   $ 18,765   $ 21,030   $ 19,502   $ 20,433   $ 20,675   $ 24,176   $ 27,240   $ 26,891   $ 29,442   $ 31,637   $ 31,956 $ 34,672 $ 36,001 $ 37,567
C000177205                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value $ 500,000   $ 526,368   $ 542,623   $ 569,573   $ 597,377   $ 627,707   $ 639,818   $ 646,097   $ 650,358   $ 566,055   $ 623,062   $ 663,244   $ 688,357   $ 735,399   $ 504,281   $ 581,843   $ 590,983   $ 776,362   $ 931,692   $ 979,042   $ 1,019,751   $ 1,071,469   $ 1,042,897   $ 886,343   $ 852,116   $ 955,435   $ 886,143   $ 928,878   $ 940,172   $ 1,099,754   $ 1,239,563   $ 1,224,272   $ 1,340,676   $ 1,441,376   $ 1,456,291   $ 1,580,700   $ 1,641,718   $ 1,713,835        
Russell 3000 Index                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value   10,000   10,097   10,362   10,818   11,274   11,921   12,280   12,842   13,656   13,568   14,095   15,099   12,940   14,757   15,361   15,540   16,954   13,410   16,364   17,871   20,495   21,796   23,592   23,568   25,754   24,395   20,321   19,413   20,808   22,302   24,172   23,386   26,209   28,835   29,762   31,616   32,448   30,916 34,314 37,120 38,012
Russell 3000 Index                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value 500,000   508,515   537,720   553,935   579,257   615,967   611,997   635,796   681,090   583,679   665,648   692,907   700,962   764,731   604,904   738,150   806,115   924,466   983,141   1,064,150   1,063,067   1,161,694   1,100,375   916,599   875,677   938,568   1,005,960   1,090,328   1,054,851   1,182,191   1,300,639   1,342,467   1,426,091   1,463,644   1,394,532   1,547,808   1,674,360   1,714,593        
MSCI US IMI/Financials 5% Capped Index                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value   $ 10,000   $ 9,622   $ 9,869   $ 10,430   $ 12,514   $ 12,759   $ 13,244   $ 13,920   $ 14,867   $ 14,834   $ 14,594   $ 14,991   $ 12,841   $ 14,125   $ 15,174   $ 15,443   $ 16,798   $ 11,156   $ 12,822   $ 13,071   $ 16,546   $ 19,315   $ 20,772   $ 21,404   $ 22,530   $ 21,887   $ 18,359   $ 17,844   $ 19,881   $ 18,703   $ 19,448   $ 19,424   $ 22,595   $ 24,955   $ 24,549   $ 27,301   $ 29,364   $ 29,632 $ 31,703 $ 32,872 $ 33,723
MSCI US IMI/Financials 5% Capped Index                                                                                                                                                              
Account Value [Line Items]                                                                                                                                                              
Accumulated Value $ 500,000   $ 525,594   $ 535,889   $ 556,257   $ 584,641   $ 624,447   $ 623,044   $ 612,969   $ 629,637   $ 539,353   $ 593,269   $ 637,337   $ 648,618   $ 705,517   $ 468,551   $ 538,539   $ 548,973   $ 694,954   $ 811,254   $ 872,429   $ 899,004   $ 946,298   $ 919,282   $ 771,072   $ 749,454   $ 835,024   $ 785,539   $ 816,824   $ 815,813   $ 948,990   $ 1,048,133   $ 1,031,083   $ 1,146,669   $ 1,233,317   $ 1,244,569   $ 1,331,534   $ 1,380,642   $ 1,416,396