CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (26,089)	$ (476)	$ (28,247)	$ 18,568
Other comprehensive income (loss):
Foreign currency translation adjustments	939	(5,295)	10,101	(10,684)
Pension adjustments, net	(55)	61	(29)	134
Net unrealized gains (loss) on available-for-sale securities	193	(132)	292	(167)
Total other comprehensive income (loss)	1,077	(5,366)	10,364	(10,717)
Comprehensive (loss) income	$ (25,012)	$ (5,842)	$ (17,883)	$ 7,851