Income Taxes (Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Current:
Federal	$ 21,869	$ 15,109	$ 15,976
State	2,310	853	1,383
Foreign	27,577	34,354	22,588
Deferred:
Federal	(13,216)	(8,369)	10,784
State	(8,623)	(2,658)	(547)
Foreign	(1,717)	(2,139)	(8,698)
Income tax expense	$ 28,200	$ 37,150	$ 41,486