Retirement and Deferred Compensation Plan - Deferred Compensation Plan (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Accrued compensations and benefits | $ 50,242 | $ 57,781 | |
Deferred Compensation Plan | |||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Deferred compensation plan assets | 6,500 | 3,200 | |
Accrued compensations and benefits | 6,500 | 5,500 | |
Employer contribution to deferred compensation plan | $ 200 | $ 200 | $ 200 |