v3.25.4
Average Annual Total Returns - January - Equity Funds IV_Pro
 12 Months Ended 34 Months Ended 60 Months Ended 120 Months Ended
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Nomura Growth and Income Fund | Russell 1000 Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   17.37%   13.59% 14.59%
Nomura Growth and Income Fund | Russell 1000 Value Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   15.91%   11.33% 10.53%
Nomura Growth and Income Fund | Institutional Class          
Prospectus [Line Items]          
Average Annual Return, Percent   29.53%   16.14% 12.01%
Nomura Growth and Income Fund | Class A          
Prospectus [Line Items]          
Average Annual Return, Percent   21.79%   14.49% 11.03%
Nomura Growth and Income Fund | Class A | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   18.83%   11.90% 7.84%
Nomura Growth and Income Fund | Class A | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   14.90%   11.01% 7.92%
Nomura Growth and Income Fund | Class R6          
Prospectus [Line Items]          
Average Annual Return, Percent   29.67%   16.22% 12.08%
Nomura Opportunity Fund | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Nomura Opportunity Fund | Russell Midcap Value Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   11.05%   9.83% 9.78%
Nomura Opportunity Fund | Class A          
Prospectus [Line Items]          
Average Annual Return, Percent   6.10%   9.72% 8.31%
Nomura Opportunity Fund | Class A | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   3.52%   7.78% 6.01%
Nomura Opportunity Fund | Class A | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   5.50%   7.49% 6.17%
Nomura Opportunity Fund | Class R6          
Prospectus [Line Items]          
Average Annual Return, Percent   12.93%   11.43% 9.38%
Nomura Opportunity Fund | Institutional Class          
Prospectus [Line Items]          
Average Annual Return, Percent   12.87%   11.32% 9.27%
Nomura Opportunity Fund | Class C          
Prospectus [Line Items]          
Average Annual Return, Percent   10.73% 10.90%    
Performance Inception Date Feb. 28, 2023        
Nomura Opportunity Fund | Class R          
Prospectus [Line Items]          
Average Annual Return, Percent   12.27% 11.45%    
Performance Inception Date Feb. 28, 2023        
[1]
Frank Russell Company is the source and owner of the trademarks, service marks, and copyrights related to the Russell Indexes. Russell® is a trademark of Frank Russell Company. 
[2]
Frank Russell Company is the source and owner of the trademarks, service marks, and copyrights related to the Russell Indexes. Russell® is a trademark of Frank Russell Company.