Selected Account Information - Reconciliation of Goodwill (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Beginning balance, gross	$ 59,967
Beginning balance, accumulated impairment	20,588
Beginning balance, net	39,379
Acquisitions, gross	22,420
Acquisitions, accumulated impairment	0
Acquisitions, net	22,420
Impairment, gross	0
Impairment, accumulated impairment	400
Impairment, net	(400)
Ending balance, gross	82,387
Ending balance, accumulated impairment	20,988
Ending balance, net	$ 61,399