Investment Objectives and Goals	Jul. 31, 2025
(Nomura Corporate Bond Fund and Nomura Extended Duration Bond Fund - Classes A, C, R, Institutional, and R6) \| Nomura Corporate Bond Fund
Prospectus [Line Items]
Objective [Heading]	What is the Fund’s investment objective?
Objective, Primary [Text Block]	Nomura Corporate Bond Fund seeks to provide investors with total return.
(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]
Objective [Heading]	What is the Fund’s investment objective?
Objective, Primary [Text Block]	Nomura Extended Duration Bond Fund seeks to provide investors with total return.
(Nomura Floating Rate Fund - Classes A, C, R, Institutional and R6) \| Nomura Floating Rate Fund
Prospectus [Line Items]
Objective [Heading]	What are the Fund’s investment objectives?
Objective, Primary [Text Block]	Nomura Floating Rate Fund seeks high current income and, secondarily, long-term total return.

Nomura Corporate Bond Fund seeks to provide investors with total return.

Nomura Extended Duration Bond Fund seeks to provide investors with total return.

Nomura Floating Rate Fund seeks high current income and, secondarily, long-term total return.