v3.25.2
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
May 31, 2015
May 31, 2025
May 31, 2016
May 31, 2017
May 31, 2018
May 31, 2019
May 31, 2020
May 31, 2021
May 31, 2022
May 31, 2023
May 31, 2024
May 31, 2025
C000021763 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Asset Allocation Fund                    
Accumulated Value $ 10,000   $ 9,784 $ 10,601 $ 11,545 $ 11,150 $ 10,999 $ 14,540 $ 14,080 $ 14,233 $ 16,789 $ 18,182
C000021764 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Equities Index Fund                    
Accumulated Value 10,000   9,001 10,439 11,235 10,583 10,221 14,157 12,595 12,962 15,322 17,210
C000021765 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Government Bond Fund                    
Accumulated Value 10,000   10,461 10,717 10,751 11,101 11,585 12,358 10,655 10,173 10,386 11,013
C000021766 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund                    
Accumulated Value 10,000   9,080 10,333 12,232 12,211 13,432 20,704 14,881 16,235 16,934 20,056
C000021768 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Large Capital Growth Fund                    
Accumulated Value 10,000   10,173 11,852 13,749 15,468 18,109 25,049 24,604 25,392 31,169 33,209
C000021769 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Mid Cap Index Fund                    
Accumulated Value 10,000   9,931 11,613 13,299 12,533 12,376 19,355 18,031 17,486 21,940 22,291
C000021770 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Mid Cap Strategic Growth Fund                    
Accumulated Value 10,000   9,709 11,498 13,703 14,724 16,604 24,519 20,999 21,815 27,175 30,800
C000021772 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Nasdaq-100® Index Fund                    
Accumulated Value 10,000   10,118 13,041 15,772 16,207 21,832 31,324 28,999 32,807 42,826 49,426
C000021773 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Science & Technology Fund                    
Accumulated Value 10,000   10,039 13,233 17,215 17,738 23,165 34,328 26,269 29,399 40,154 46,661
C000021774 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Systematic Growth Fund                    
Accumulated Value 10,000   10,017 12,371 15,819 16,487 20,076 26,840 21,010 22,116 30,131 34,740
C000021776 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Small Cap Index Fund                    
Accumulated Value 10,000   9,400 11,297 13,603 12,347 11,870 19,465 16,129 15,306 18,317 18,451
C000021777 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Socially Responsible Fund                    
Accumulated Value 10,000   9,717 11,189 12,549 12,621 12,363 17,143 15,194 15,646 18,395 20,459
C000021778 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Stock Index Fund                    
Accumulated Value 10,000   10,138 11,870 13,530 13,995 15,738 22,026 21,903 22,469 28,692 32,470
C000021782 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Government Securities Fund                    
Accumulated Value 10,000   10,274 10,309 10,173 10,781 11,705 11,506 10,647 10,441 10,509 11,027
C000021783 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Systematic Core Fund                    
Accumulated Value 10,000   10,008 11,731 13,159 13,537 15,578 22,387 21,649 21,808 27,818 31,066
C000021785 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Dividend Value Fund                    
Accumulated Value 10,000   10,220 11,907 12,876 12,854 12,812 17,753 18,143 17,510 21,128 23,189
C000021786 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Inflation Protected Fund                    
Accumulated Value 10,000   10,000 10,320 10,435 10,801 11,328 12,206 12,044 11,807 11,970 12,391
C000022843 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Systematic Value Fund                    
Accumulated Value 10,000   9,553 11,202 12,360 12,132 11,848 16,220 16,794 16,140 19,827 22,300
C000022844 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Value Fund                    
Accumulated Value 10,000   8,628 10,557 10,893 9,387 8,432 12,632 11,102 10,963 13,473 15,742
C000022845 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Emerging Economies Fund                    
Accumulated Value 10,000   8,140 10,615 12,049 10,633 10,236 15,493 12,386 10,965 12,876 14,378
C000022846 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Strategy Fund                    
Accumulated Value 10,000   8,977 10,248 10,731 10,175 10,072 12,036 10,883 10,661 12,770 14,006
C000022849 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Small Cap Special Values Fund                    
Accumulated Value 10,000   10,149 11,941 13,778 12,831 11,422 19,087 18,098 16,713 21,135 19,517
C000022851 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Growth Fund                    
Accumulated Value 10,000   9,931 11,965 14,429 14,812 18,874 25,778 21,957 23,579 31,996 37,042
C000059956 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Real Estate Fund                    
Accumulated Value 10,000   10,153 10,659 11,319 12,236 10,967 14,087 13,290 11,169 12,123 13,320
C000121199 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Dynamic Allocation Fund                    
Accumulated Value 10,000   9,530 10,672 11,680 11,852 13,088 15,498 14,370 14,056 16,256 17,592
C000222575 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Aggressive Growth Lifestyle Fund                    
Accumulated Value 10,000   9,710 10,950 12,124 11,883 12,291 16,975 15,681 15,617 18,637 20,602
C000222576 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Socially Responsible Fund                    
Accumulated Value 10,000   10,175 11,779 13,402 13,920 15,553 21,580 20,954 21,177 27,170 30,207
C000222577 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Capital Appreciation Fund                    
Accumulated Value 10,000   10,123 11,535 13,696 14,112 16,456 23,248 21,766 23,072 31,321 35,903
C000222578 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Conservative Growth Lifestyle Fund                    
Accumulated Value 10,000   9,840 10,601 11,110 11,248 11,740 14,303 13,177 13,005 14,361 15,471
C000222579 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Core Bond Fund                    
Accumulated Value 10,000   10,194 10,463 10,416 11,021 11,972 12,316 11,238 10,903 11,208 11,832
C000222580 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   High Yield Bond Fund                    
Accumulated Value 10,000   9,851 10,994 11,238 11,749 11,915 13,685 12,954 12,995 14,288 15,490
C000222581 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Opportunities Fund                    
Accumulated Value 10,000   10,036 11,684 14,105 12,479 12,889 17,457 14,373 13,414 15,463 17,139
C000222582 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Mid Cap Value Fund                    
Accumulated Value 10,000   9,782 11,106 12,343 11,596 10,925 17,136 17,175 16,339 20,271 20,942
C000222583 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Moderate Growth Lifestyle Fund                    
Accumulated Value 10,000   9,825 10,854 11,811 11,786 12,307 16,111 15,066 14,962 17,180 18,750
C000222584 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Small Cap Value Fund                    
Accumulated Value 10,000   9,670 11,348 13,100 11,104 9,417 17,026 16,091 14,396 17,552 17,064
C000224903 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Small Cap Growth Fund                    
Accumulated Value 10,000   8,856 11,558 16,091 15,857 19,232 28,891 20,249 19,861 22,813 23,362
Standard & Poor's 500 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500® Index                    
Accumulated Value 10,000   10,171.6 11,948.42 13,667.07 14,184.07 16,004.95 22,457.91 22,390.65 23,044.84 29,540.41 33,535.16
Bloomberg U S Aggregate Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg U.S. Aggregate Bond Index                    
Accumulated Value 10,000   10,299.46 10,462.04 10,422.85 11,089.95 12,134.12 12,084.96 11,091.34 10,853.69 10,995.37 11,595.64
MSCI ACWI Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI ACWI Index (net)                    
Accumulated Value 10,000   9,457.94 11,115.86 12,431.57 12,270.81 12,937.12 18,350.7 17,106.11 17,251.59 21,315.46 24,225.44
MSCI ACWI ex USA Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI ACWI ex USA Index (net)                    
Accumulated Value 10,000   8,860.75 10,477.19 11,490.56 10,771.26 10,401.43 14,850.77 13,008.27 12,825.5 14,972.89 17,031.81
Bloomberg Global Aggregate Index USD hedged [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg Global Aggregate Index (USD hedged)                    
Accumulated Value 10,000   10,406.18 10,590.06 10,715.23 11,412.12 12,213.22 12,224.06 11,357.94 11,250.06 11,614.95 12,318.7
Bloomberg U S Universal Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg U.S. Universal Index                    
Accumulated Value 10,000   10,282.69 10,568.04 10,545.32 11,221.52 12,175.83 12,324.67 11,287.71 11,074.9 11,338.04 12,000.08
Russell 3000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 3000® Index                    
Accumulated Value 10,000   10,022.33 11,795.4 13,571.96 13,910.74 15,505.4 22,314.08 21,492.05 21,929.34 27,978.11 31,648.37
MSCI EAFE Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI EAFE Index (net)                    
Accumulated Value 10,000   9,032.18 10,516.74 11,355.17 10,702.69 10,401.59 14,397.28 12,902.92 13,297.86 15,761.48 17,862.36
Russell 1000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000® Index                    
Accumulated Value 10,000   10,077.56 11,838.79 13,566.76 14,037.09 15,797.02 22,536.29 21,926.06 22,462.73 28,753.92 32,702.70
Sixty S And P 500 Index 40 Bloomberg U S Aggregate Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   60% S&P 500® Index; 40% Bloomberg U.S. Aggregate Bond Index                    
Accumulated Value 10,000   10,246.4 11,365.46 12,315.04 12,960.28 14,527.72 17,829.84 17,234.72 17,435.92 20,378.24 22,497.99
Russell 1000 Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000® Growth Index                    
Accumulated Value 10,000   10,160.72 12,220 14,789.06 15,586.75 19,678.65 27,535.16 25,813.81 28,278.21 37,780.1 44,437.61
Twenty Six Russell 3000 Index 9 MSCI EAFE Index net 65 Bloomberg U S Aggregate Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   26% Russell 3000® Index; 9% MSCI EAFE Index (net); 65% Bloomberg U.S. Aggregate Bond Index                    
Accumulated Value 10,000   10,132.39 10,836.93 11,301.7 11,822.65 12,936.14 14,653.32 13,614.2 13,571.8 14,830.6 16,059.1
FTSE EPRA NAREIT Developed Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FTSE EPRA /NAREIT Developed Index (net)                    
Accumulated Value 10,000   10,338.95 10,655.6 11,181.24 12,023.27 9,970.27 13,551.8 12,948.38 10,955.63 11,756.2 13,001.12
Russell 1000 Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000® Value Index                    
Accumulated Value 10,000   9,994.21 11,458.91 12,403.96 12,583.62 12,377.34 17,870.8 18,037.32 17,217.29 20,955.44 22,822.48
Sixty MSCI ACWI Index net 40 Bloomberg Global Aggregate Index USD hedged [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   60% MSCI ACWI Index (net); 40% Bloomberg Global Aggregate Index (USD hedged)                    
Accumulated Value 10,000   9,853 10,938.23 11,764.81 12,009.05 12,804.6 15,849.18 14,779.59 14,836.46 17,088.87 18,908.94
MSCI Emerging Markets Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI Emerging Markets Index (net)                    
Accumulated Value 10,000   8,236.9 10,494.51 11,966.76 10,926.17 10,446.86 15,774.97 12,647 11,573.7 13,007.47 14,703.25
Bloomberg U S Government Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg U.S. Government Bond Index                    
Accumulated Value 10,000   10,294.09 10,301.19 10,218.81 10,858.01 12,078.71 11,643.12 10,776.14 10,538.25 10,523.07 11,054.47
Seventy FTSE WGBI Index unhedged 30 JPMorgan EMBI Global Diversified Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   70% FTSE WGBI Index (unhedged); 30% JPMorgan EMBI Global Diversified Index                    
Accumulated Value 10,000   10,629.11 10,898.3 11,038.26 11,502.52 12,054.83 12,638.91 10,737.11 10,275.57 10,558.56 11,293.83
MSCI EAFE Value Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI EAFE Value Index (net)                    
Accumulated Value 10,000   8,623.85 10,214.32 10,818.13 9,927.89 8,634.75 12,220.19 11,674.85 11,684.53 14,439.8 17,143.13
MSCI ACWI ex USA SMID Cap Index net [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI ACWI ex USA SMID Cap Index (net)                    
Accumulated Value 10,000   9,403.38 10,940.53 12,343.39 10,996.98 10,631.01 15,663.43 13,463.65 12,978.53 14,988.27 17,072.06
FTSE US High Yield Market Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FTSE US High-Yield Market Index                    
Accumulated Value 10,000   9,828.78 11,155.19 11,431.88 12,012.97 12,051.65 13,883.28 13,215.49 13,214.68 14,706.03 16,114.37
Bloomberg U S TIPS Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg U.S. TIPS Index                    
Accumulated Value 10,000   10,123.39 10,367.27 10,443.99 10,899.65 11,771.9 12,602.38 12,420.13 11,899.01 12,084.94 12,769.56
S And P MidCap 400 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P MidCap 400® Index                    
Accumulated Value 10,000   9,958.02 11,667.02 13,400.38 12,671.79 12,568.98 19,704.09 18,419.48 17,935.72 22,593.38 23,084.15
Russell Midcap Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap® Growth Index                    
Accumulated Value 10,000   9,629.88 11,236.38 13,305.64 14,220.29 16,641.68 22,928.69 18,638.23 19,710.6 24,028.88 29,611.96
Russell Midcap Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap® Value Index                    
Accumulated Value 10,000   9,968.93 11,490.86 12,447.34 12,186.62 11,344.94 17,767.7 17,757.68 16,071.6 19,875.45 21,073.28
Russell 2000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000® Index                    
Accumulated Value 10,000   9,402.72 11,317.25 13,667.23 12,431.03 12,003.55 19,753.59 16,412.25 15,644.25 18,791.1 19,013.86
S And P North American Technology Sector Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P North American Technology Sector Index                    
Accumulated Value 10,000   10,616.7 14,135.85 18,570.18 19,520.43 25,981.87 37,573 32,919.58 37,598.43 53,017.76 61,765.65
Forty One Russell 3000 Index 14 MSCI EAFE Index net 45 Bloomberg U S Aggregate Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   41% Russell 3000® Index; 14% MSCI EAFE Index (net); 45% Bloomberg U.S. Aggregate Bond Index                    
Accumulated Value 10,000   10,027.76 11,041.95 11,816.19 12,223.15 13,341.27 16,240.46 15,184.3 15,278.68 17,422.86 19,142.58
Nasdaq 100 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Nasdaq-100® Index                    
Accumulated Value 10,000   10,166.99 13,165.34 16,015.56 16,561.58 22,432.28 32,372.69 30,119.04 34,267.66 44,930.75 52,128.28
Russell 2000 Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000® Value Index                    
Accumulated Value 10,000   9,724.97 11,767.56 13,691.7 12,142.35 10,358.51 18,581.47 17,156.94 15,184.72 18,488.46 18,278.51
Russell 2000 Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000® Growth Index                    
Accumulated Value 10,000   9,086.61 10,877.51 13,605.36 12,668.84 13,596.73 20,413.49 15,165.21 15,571.7 18,434.23 19,070.73
Fifty Six Russell 3000 Index 19 MSCI EAFE Index net 25 Bloomberg U S Aggregate Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   56% Russell 3000® Index; 19% MSCI EAFE Index (net); 25% Bloomberg U.S. Aggregate Bond Index                    
Accumulated Value $ 10,000   $ 9,915.68 $ 11,238.3 $ 12,336.33 $ 12,603.67 $ 13,694.95 $ 17,895.55 $ 16,828.01 $ 17,075.44 $ 20,308.8 $ 22,631.36