Annual report pursuant to Section 13 and 15(d)

Employee Benefits Plans - Schedule of MSP Benefit Expense Charged to Costs and Expenses (Details)

v3.20.2
Employee Benefits Plans - Schedule of MSP Benefit Expense Charged to Costs and Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract]      
Interest cost $ 195 $ 171 $ 293
MSP termination adjustments   985  
Recognized actuarial gain (loss) adjustment 12 13 16
Total $ 207 $ 1,169 $ 309