Annual report pursuant to Section 13 and 15(d)

Employee Benefits Plans - Narrative (Details)

v3.19.3
Employee Benefits Plans - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Retirement Benefits [Abstract]      
Benefit plan period 180 months    
Weighted-average discount rate 4.08% 4.08%  
Additional liability recorded $ 720    
Matching contribution (as a percent) (up to) 4.00%    
Contribution to plan $ 380 $ 342 $ 445
Contribution to profit sharing plan $ 0 $ 0 $ 378