v3.25.4
S000016733 [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 2500™ Value Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent 12.73% 10.02% 8.15% [1] 9.72%
Performance Inception Date     Sep. 29, 2017  
Russell 2000® Value Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent 12.59% 8.88% 6.96% [1] 9.27%
Performance Inception Date     Sep. 29, 2017  
CLASS N SHARES        
Prospectus [Line Items]        
Average Annual Return, Percent 4.01% 8.59% [1] 10.80%
CLASS N SHARES | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 2.69% 7.15% [1] 9.17%
CLASS N SHARES | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 3.05% 6.62% [1] 8.46%
CLASS I SHARES        
Prospectus [Line Items]        
Average Annual Return, Percent 4.21% 8.86% [1] 11.10%
CLASS Z Shares        
Prospectus [Line Items]        
Average Annual Return, Percent 4.36% 8.93% 8.66% [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.