v3.25.4
Shareholder Report, Average Annual Return (Details)
12 Months Ended 35 Months Ended 60 Months Ended 116 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Without Sales Load [Member] | C000028890          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.27%   5.28%   6.52%
Without Sales Load [Member] | C000028891          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.96%   5.92%   7.16%
Without Sales Load [Member] | C000028892          
Average Annual Return [Line Items]          
Average Annual Return, Percent 10.87%   5.51%   6.82%
Without Sales Load [Member] | C000028893          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.09%   5.41%   6.69%
Without Sales Load [Member] | C000125916          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.89%   3.15%   6.06%
Without Sales Load [Member] | C000125917          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.23%   3.46%   6.38%
Without Sales Load [Member] | C000125918          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.02%   3.21%   6.12%
Without Sales Load [Member] | C000015922          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.03%   3.29%   5.18%
Without Sales Load [Member] | C000015923          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.80%   3.92%   5.82%
Without Sales Load [Member] | C000015924          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.41%   3.66%   5.55%
Without Sales Load [Member] | C000015921          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.25%   3.50%   5.39%
Without Sales Load [Member] | C000047545          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.64%   0.35%   2.23%
Without Sales Load [Member] | C000047546          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   0.97%   2.84%
Without Sales Load [Member] | C000047547          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.96%   0.71%   2.59%
Without Sales Load [Member] | C000015798          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.64%   11.57%   14.50%
Without Sales Load [Member] | C000015799          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.33%   12.23%   15.19%
Without Sales Load [Member] | C000163203          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.30%   12.23%   15.19%
Without Sales Load [Member] | C000015800          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.09%   11.96%   14.90%
Without Sales Load [Member] | C000015801          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.79%   11.77%   14.72%
Without Sales Load [Member] | C000034673          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.09%   12.34%   10.66%
Without Sales Load [Member] | C000034674          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.74%   13.03%   11.33%
Without Sales Load [Member] | C000163204          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.86%   13.05%   11.33%
Without Sales Load [Member] | C000034675          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.68%   12.78%   11.06%
Without Sales Load [Member] | C000034676          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.43%   12.60%   10.90%
Without Sales Load [Member] | C000015349          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.08%   1.51%   1.66%
Without Sales Load [Member] | C000015350          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.69%   2.13%   2.27%
Without Sales Load [Member] | C000015351          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.42%   1.86%   2.01%
Without Sales Load [Member] | C000079016          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.23%   2.49%   4.51%
Without Sales Load [Member] | C000079017          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.53%   2.74%   4.73%
Without Sales Load [Member] | C000079018          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.56%   8.46%   9.15%
Without Sales Load [Member] | C000079019          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.08%   8.92%   9.62%
Without Sales Load [Member] | C000079020          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.94%   7.08%   8.16%
Without Sales Load [Member] | C000079021          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.29%   7.50%   8.59%
Without Sales Load [Member] | C000079022          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.72%   4.50%   6.28%
Without Sales Load [Member] | C000079023          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.09%   4.86%   6.64%
Without Sales Load [Member] | C000075972          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.91%   13.50%   13.91%
Without Sales Load [Member] | C000015822          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.53%   14.10%   14.51%
Without Sales Load [Member] | C000047554          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.23%   13.83%   14.23%
Without Sales Load [Member] | C000053098          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.08%   13.65%   14.05%
Without Sales Load [Member] | C000240437          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.67% 20.94%      
Without Sales Load [Member] | C000015417          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.21%   3.41%   3.37%
Without Sales Load [Member] | C000015418          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.82%   4.03%   3.99%
Without Sales Load [Member] | C000015419          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.53%   3.77%   3.73%
Without Sales Load [Member] | C000015420          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.35%   3.60%   3.57%
Without Sales Load [Member] | C000015784          
Average Annual Return [Line Items]          
Average Annual Return, Percent (0.31%)   5.30%   4.43%
Without Sales Load [Member] | C000015785          
Average Annual Return [Line Items]          
Average Annual Return, Percent 0.30%   5.93%   5.06%
Without Sales Load [Member] | C000015786          
Average Annual Return [Line Items]          
Average Annual Return, Percent 0.03%   5.67%   4.80%
Without Sales Load [Member] | C000015787          
Average Annual Return [Line Items]          
Average Annual Return, Percent (0.10%)   5.51%   4.64%
Without Sales Load [Member] | C000015780          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.93%   12.42%   10.33%
Without Sales Load [Member] | C000015781          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.63%   13.09%   11.00%
Without Sales Load [Member] | C000015782          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.35%   12.82%   10.72%
Without Sales Load [Member] | C000015783          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.18%   12.65%   10.56%
Without Sales Load [Member] | C000015329          
Average Annual Return [Line Items]          
Average Annual Return, Percent 38.59%   (0.26%)   8.65%
Without Sales Load [Member] | C000015330          
Average Annual Return [Line Items]          
Average Annual Return, Percent 39.06%   0.29%   9.27%
Without Sales Load [Member] | C000015331          
Average Annual Return [Line Items]          
Average Annual Return, Percent 38.77%   0.04%   9.00%
Without Sales Load [Member] | C000015332          
Average Annual Return [Line Items]          
Average Annual Return, Percent 38.84%   (0.05%)   8.87%
Without Sales Load [Member] | C000028903          
Average Annual Return [Line Items]          
Average Annual Return, Percent 3.21%   4.25%   8.38%
Without Sales Load [Member] | C000015333          
Average Annual Return [Line Items]          
Average Annual Return, Percent 3.86%   4.89%   9.04%
Without Sales Load [Member] | C000168687          
Average Annual Return [Line Items]          
Average Annual Return, Percent 3.87%   4.90% 9.29%  
Without Sales Load [Member] | C000015334          
Average Annual Return [Line Items]          
Average Annual Return, Percent 3.65%   4.63%   8.77%
Without Sales Load [Member] | C000015335          
Average Annual Return [Line Items]          
Average Annual Return, Percent 3.49%   4.47%   8.60%
Without Sales Load [Member] | C000015776          
Average Annual Return [Line Items]          
Average Annual Return, Percent (0.20%)   4.44%   8.83%
Without Sales Load [Member] | C000168690          
Average Annual Return [Line Items]          
Average Annual Return, Percent 0.33%   5.06% 9.37%  
Without Sales Load [Member] | C000015778          
Average Annual Return [Line Items]          
Average Annual Return, Percent 0.10%   4.80%   9.21%
Without Sales Load [Member] | C000015779          
Average Annual Return [Line Items]          
Average Annual Return, Percent 0.02%   4.66%   9.05%
Without Sales Load [Member] | C000015823          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.62%   8.83%   10.65%
Without Sales Load [Member] | C000015824          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.32%   9.49%   11.32%
Without Sales Load [Member] | C000168694          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.31%   9.49% 11.36%  
Without Sales Load [Member] | C000015825          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.02%   9.22%   11.04%
Without Sales Load [Member] | C000015826          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.83%   9.04%   10.87%
Without Sales Load [Member] | C000015827          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.80%   10.61%   10.02%
Without Sales Load [Member] | C000015828          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.57%   11.28%   10.68%
Without Sales Load [Member] | C000015829          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.31%   11.00%   10.41%
Without Sales Load [Member] | C000015830          
Average Annual Return [Line Items]          
Average Annual Return, Percent 14.05%   10.83%   10.24%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15% 20.20%      
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
MSCI All Country World Ex-U.S. IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 32.39%   7.91%   8.41%
MSCI All Country World Ex-U.S. IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 32.39%   7.91%   8.41%
MSCI All Country World Ex-U.S. IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 32.39%   7.91%   8.41%
MSCI All Country World Ex-U.S. IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 32.39%   7.91%   8.41%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15% 14.66%  
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19% 11.98%  
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19% 11.98%  
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
MSCI All Country World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 22.34%   11.19%   11.72%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
60% Bloomberg US Aggregate Bond Index/ 30% Russell 1000® Index/ 10% MSCI EAFE® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.65%   4.76%   6.53%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
Russell 1000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.37%   13.59%   14.59%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
60% Bloomberg US Aggregate Bond Index/ 30% Russell 1000® Index/ 10% MSCI EAFE® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.65%   4.76%   6.53%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
Russell 1000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.37%   13.59%   14.59%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
60% Bloomberg US Aggregate Bond Index/ 30% Russell 1000® Index/ 10% MSCI EAFE® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.65%   4.76%   6.53%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
Russell 1000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.37%   13.59%   14.59%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
60% Bloomberg US Aggregate Bond Index/ 30% Russell 1000® Index/ 10% MSCI EAFE® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.65%   4.76%   6.53%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
Russell 1000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.37%   13.59%   14.59%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P Target Risk Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.59%   7.05%   8.14%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P Target Risk Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.59%   7.05%   8.14%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P Target Risk Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.59%   7.05%   8.14%
ICE BofA U.S. High Yield Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.50%   4.50%   6.45%
Bloomberg High Yield Bond - 2% Issuer Constrained Composite Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.62%   4.50%   6.52%
ICE BofA U.S. High Yield Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.50%   4.50%   6.45%
Bloomberg High Yield Bond - 2% Issuer Constrained Composite Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.62%   4.50%   6.52%
ICE BofA U.S. High Yield Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.50%   4.50%   6.45%
Bloomberg High Yield Bond - 2% Issuer Constrained Composite Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.62%   4.50%   6.52%
ICE BofA U.S. High Yield Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.50%   4.50%   6.45%
Bloomberg High Yield Bond - 2% Issuer Constrained Composite Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 8.62%   4.50%   6.52%
Bloomberg U.S. TIPS Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.01%   1.12%   3.09%
Bloomberg U.S. TIPS Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.01%   1.12%   3.09%
Bloomberg U.S. TIPS Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.01%   1.12%   3.09%
Russell 1000® Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 18.56%   15.32%   18.13%
Russell 1000® Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 18.56%   15.32%   18.13%
Russell 1000® Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 18.56%   15.32%   18.13%
Russell 1000® Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 18.56%   15.32%   18.13%
Russell 1000® Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 18.56%   15.32%   18.13%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Bloomberg U.S. 1-3 Year Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.35%   1.97%   2.09%
Bloomberg U.S. 1-3 Year Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.35%   1.97%   2.09%
Bloomberg U.S. 1-3 Year Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 5.35%   1.97%   2.09%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P Target Risk® Conservative Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.74%   3.60%   5.30%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P Target Risk® Conservative Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 11.74%   3.60%   5.30%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk Aggressive® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 19.75%   9.31%   9.97%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk Aggressive® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 19.75%   9.31%   9.97%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.59%   7.05%   8.14%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk Growth Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 16.59%   7.05%   8.14%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk® Moderate Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.37%   4.75%   6.26%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
MSCI EAFE Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 31.22%   8.92%   8.18%
S&P Target Risk® Moderate Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.37%   4.75%   6.26%
Russell 3000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.15%   13.15%   14.29%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88% 21.16%      
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
FTSE EPRA Nareit Developed Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.58%   2.76%   3.25%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
FTSE EPRA Nareit Developed Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.58%   2.76%   3.25%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
FTSE EPRA Nareit Developed Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.58%   2.76%   3.25%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
FTSE EPRA Nareit Developed Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 9.58%   2.76%   3.25%
MSCI U.S. REIT® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 2.95%   6.58%   5.71%
MSCI U.S. REIT® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 2.95%   6.58%   5.71%
MSCI U.S. REIT® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 2.95%   6.58%   5.71%
MSCI U.S. REIT® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 2.95%   6.58%   5.71%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
MSCI Emerging Markets IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 33.57%   4.20%   8.42%
MSCI Emerging Markets IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 33.57%   4.20%   8.42%
MSCI Emerging Markets IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 33.57%   4.20%   8.42%
MSCI Emerging Markets IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 33.57%   4.20%   8.42%
Russell 2000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.81%   6.09%   9.62%
Russell 2000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.81%   6.09%   9.62%
Russell 2000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.81%   6.09% 10.06%  
Russell 2000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.81%   6.09%   9.62%
Russell 2000® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 12.81%   6.09%   9.62%
MSCI World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 21.09%   12.15%   12.17%
MSCI World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 21.09%   12.15% 12.57%  
MSCI World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 21.09%   12.15%   12.17%
MSCI World IndexSM          
Average Annual Return [Line Items]          
Average Annual Return, Percent 21.09%   12.15%   12.17%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Bloomberg U.S. Government/Credit Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.88%   (0.59%)   2.16%
60% S&P 500® Index / 40% Bloomberg U.S. Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.52%   8.37%   9.85%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Bloomberg U.S. Government/Credit Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.88%   (0.59%)   2.16%
60% S&P 500® Index / 40% Bloomberg U.S. Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.52%   8.37%   9.85%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%) 1.72%  
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42% 15.19%  
Bloomberg U.S. Government/Credit Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.88%   (0.59%) 1.82%  
60% S&P 500 Index / 40% Bloomberg U.S. Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.52%   8.37% 9.91%  
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Bloomberg U.S. Government/Credit Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.88%   (0.59%)   2.16%
60% S&P 500® Index / 40% Bloomberg U.S. Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.52%   8.37%   9.85%
Bloomberg U.S. Aggregate Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 7.30%   (0.36%)   2.01%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Bloomberg U.S. Government/Credit Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 6.88%   (0.59%)   2.16%
60% S&P 500® Index / 40% Bloomberg U.S. Government/Credit Bond Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 13.52%   8.37%   9.85%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%
S&P 500® Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 17.88%   14.42%   14.82%
Russell 1000® Value Index          
Average Annual Return [Line Items]          
Average Annual Return, Percent 15.91%   11.33%   10.53%