v3.25.3
Expense Example, No Redemption - Class C
Jul. 31, 2025
USD ($)
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Corporate Bond Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 157
Expense Example, No Redemption, 3 Years 508
Expense Example, No Redemption, 5 Years 882
Expense Example, No Redemption, 10 Years 1,935
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 159
Expense Example, No Redemption, 3 Years 530
Expense Example, No Redemption, 5 Years 927
Expense Example, No Redemption, 10 Years 2,037
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 170
Expense Example, No Redemption, 3 Years 526
Expense Example, No Redemption, 5 Years 907
Expense Example, No Redemption, 10 Years $ 1,976