v3.25.3
Expense Example
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 | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 527
Expense Example, with Redemption, 3 Years 712
Expense Example, with Redemption, 5 Years 912
Expense Example, with Redemption, 10 Years 1,488
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Corporate Bond Fund | Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 257
Expense Example, with Redemption, 3 Years 508
Expense Example, with Redemption, 5 Years 882
Expense Example, with Redemption, 10 Years 1,935
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Corporate Bond Fund | Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 106
Expense Example, with Redemption, 3 Years 352
Expense Example, with Redemption, 5 Years 618
Expense Example, with Redemption, 10 Years 1,377
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Corporate Bond Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 55
Expense Example, with Redemption, 3 Years 195
Expense Example, with Redemption, 5 Years 347
Expense Example, with Redemption, 10 Years 789
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Corporate Bond Fund | Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 47
Expense Example, with Redemption, 3 Years 169
Expense Example, with Redemption, 5 Years 303
Expense Example, with Redemption, 10 Years 692
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 529
Expense Example, with Redemption, 3 Years 734
Expense Example, with Redemption, 5 Years 956
Expense Example, with Redemption, 10 Years 1,593
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund | Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 259
Expense Example, with Redemption, 3 Years 530
Expense Example, with Redemption, 5 Years 927
Expense Example, with Redemption, 10 Years 2,037
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund | Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 108
Expense Example, with Redemption, 3 Years 376
Expense Example, with Redemption, 5 Years 664
Expense Example, with Redemption, 10 Years 1,484
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 57
Expense Example, with Redemption, 3 Years 218
Expense Example, with Redemption, 5 Years 394
Expense Example, with Redemption, 10 Years 902
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) | Nomura Extended Duration Bond Fund | Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 49
Expense Example, with Redemption, 3 Years 193
Expense Example, with Redemption, 5 Years 350
Expense Example, with Redemption, 10 Years 805
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 366
Expense Example, with Redemption, 3 Years 560
Expense Example, with Redemption, 5 Years 770
Expense Example, with Redemption, 10 Years 1,375
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund | Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 270
Expense Example, with Redemption, 3 Years 526
Expense Example, with Redemption, 5 Years 907
Expense Example, with Redemption, 10 Years 1,976
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund | Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 119
Expense Example, with Redemption, 3 Years 372
Expense Example, with Redemption, 5 Years 644
Expense Example, with Redemption, 10 Years 1,420
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 214
Expense Example, with Redemption, 5 Years 373
Expense Example, with Redemption, 10 Years 835
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) | Nomura Floating Rate Fund | Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 192
Expense Example, with Redemption, 5 Years 335
Expense Example, with Redemption, 10 Years $ 750