Employee Benefits Plans - Narrative (Details) - USD ($) |
1 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Aug. 31, 2020 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Retirement Benefits [Abstract] | |||||
| Benefit plan period | 180 months | ||||
| Weighted-average discount rate | 4.08% | ||||
| MSP termination benefits payment | $ 5,175,000 | $ 5,175,000 | |||
| Additional liability recorded | $ 720,000 | ||||
| Matching contribution (as a percent) (up to) | 4.00% | ||||
| Contributions to plan | $ 398,000 | $ 401,000 | 397,000 | ||
| Contribution to profit sharing plan | $ 0 | $ 0 | $ 0 | ||
| X | ||||||||||
- Definition Defined benefit plan benefit obligation termination benefits paid. No definition available.
|
| X | ||||||||||
- Definition Defined Benefit Plan, Plan Period No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. No definition available.
|
| X | ||||||||||
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
|