XML 51 R39.htm IDEA: XBRL DOCUMENT v3.22.1
Intangible Assets - Information About Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Sep. 30, 2021
Intangible Assets Net Excluding Goodwill [Abstract]    
Customer relationship $ 43,800 $ 43,800
Accumulated amortization (37,519) (37,008)
Net carrying value $ 6,281 $ 6,792