Annual report pursuant to Section 13 and 15(d)

Employee Benefits Plans - Narrative (Details)

v3.20.2
Employee Benefits Plans - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Aug. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Compensation And Retirement Disclosure [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%    
Contribution to plan   $ 397,000 380,000 $ 342,000
Contribution to profit sharing plan   $ 0 $ 0 $ 0