v3.26.1
Growth Equity Index Fund Average Annual Total Returns
 12 Months Ended 40 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Index (reflects no deduction for fees, expenses or taxes)[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   17.37% 19.25% 13.59% 14.59%
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   18.56% 24.58% 15.32% 18.12%
Institutional | Return Before Taxes[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   18.31% 24.26%    
Performance Inception Date Aug. 31, 2022        
Investor | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   17.07% 23.08%    
Investor | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   11.29% 19.05%    
Investor | Return Before Taxes[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   18.03% 23.93%    
Performance Inception Date Aug. 31, 2022        
[1] After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.Actual after-tax returns depend on your tax situation and may differ from those shown and are not relevant if you hold your shares through tax-advantaged arrangements, such as 403(b) plans, 401(k) plans or individual retirement accounts (IRAs). After tax returns are shown only for the Investor Class and after tax returns for the Institutional Class will vary.