v3.26.1
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
NAA ALL CAP VALUE SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 12.87% 11.12% 10.40%
NAA ALL CAP VALUE SERIES Class S | S&P Composite 1500 Value Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 12.72% 12.76% 11.63%
NAA LARGE CAP VALUE SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 14.16% 12.15% 10.88%
NAA LARGE CAP VALUE SERIES Class S | S&P 500® Value Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 13.19% 12.96% 11.73%
NAA LARGE CORE SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 16.43% 13.65% 14.25%
NAA LARGE CORE SERIES Class S | S&P 500® Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.88% 14.42% 14.82%
NAA LARGE GROWTH SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 17.02% 13.89% 17.04%
NAA LARGE GROWTH SERIES Class S | S&P 500® Growth Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 22.23% 15.03% 16.99%
NAA MID GROWTH SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 2.17% 4.48% 10.63%
NAA MID GROWTH SERIES Class S | S&P MidCap 400® Growth Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 7.46% 7.12% 10.44%
NAA SMALL CAP VALUE SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 3.30% 8.47% 7.65%
NAA SMALL CAP VALUE SERIES Class S | S&P Small Cap 600 Value Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 6.71% 8.96% 9.63%
NAA SMALL GROWTH SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 6.58% 2.59% 8.89%
NAA SMALL GROWTH SERIES Class S | S&P Small Cap 600 Growth Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 5.38% 5.54% 9.82%
NAA SMID-CAP VALUE SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent 7.35% 9.30% 9.97%
NAA SMID-CAP VALUE SERIES Class S | S&P 1000 Value Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 7.37% 10.41% 10.37%
NAA WORLD EQUITY INCOME SERIES Class S      
Prospectus [Line Items]      
Average Annual Return, Percent [3] 22.75% 11.42% 9.99%
NAA WORLD EQUITY INCOME SERIES Class S | S&P Developed BMI Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 22.26% 11.73% 12.21%
[1] Returns are not presented for Class L shares. That share class has not commenced operations as of the date of this Prospectus. Performance information for Class L shares will be shown when that share class has a full calendar year of operations.
[2] Returns are not presented for Class L shares. That share class has not commenced operations as of the date of this Prospectus. Performance information for Class L shares will be shown when that share class has a full calendar year of operations.
[3] Returns are not presented for Class L shares. That share class has not commenced operations as of the date of this Prospectus. Performance information for Class L shares will be shown when that share class has a full calendar year of operations.