v3.25.4
S000001125 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 99 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent 17.88% 14.42% 14.76% [1] 14.82%
Performance Inception Date     Sep. 29, 2017  
Russell Midcap® Value Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent 11.05% 9.83% 8.58% [1] 9.78%
Performance Inception Date     Sep. 29, 2017  
CLASS N SHARES        
Prospectus [Line Items]        
Average Annual Return, Percent 11.75% 13.50% [1] 9.79%
CLASS N SHARES | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 8.09% 7.92% [1] 6.27%
CLASS N SHARES | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 8.81% 9.06% [1] 6.88%
CLASS I SHARES        
Prospectus [Line Items]        
Average Annual Return, Percent 12.11% 13.84% [1] 10.09%
Class Z Shares        
Prospectus [Line Items]        
Average Annual Return, Percent 12.16% 13.89% 8.71% [1]
Performance Inception Date     Sep. 29, 2017  
[1] Class Z and Index performance shown reflects performance since the inception date of the Fund's Class Z shares on September 29, 2017.