Income Tax Expense - Principal Components Of Income Tax Expense (Benefit) From Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Federal:
Current	$ 7,248	$ 14,807	$ 10,495
Deferred	9,752	(1,598)	1,311
State and local:
Current	1,635	2,257	1,984
Deferred	1,774	(786)	(932)
Foreign:
Current	4,645	2,922	2,875
Deferred	(939)	(427)	(2,223)
Total	$ 24,115	$ 17,175	$ 13,510