CONSOLIDATED AND COMBINED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 12,495	$ 454	$ 733	$ 2,709
Other comprehensive (loss) income:
Foreign currency translation adjustments	(7,284)	527	(2,380)	(3,180)
Pension adjustments	90	45	1,016	367
Total other comprehensive (loss) income	(7,194)	572	(1,364)	(2,813)
Comprehensive income (loss)	$ 5,301	$ 1,026	$ (631)	$ (104)