CONSOLIDATED AND COMBINED STATEMENT OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (11,762)	$ 2,255
Other comprehensive income (loss):
Foreign currency translation adjustments	4,904	(3,707)
Pension adjustments	926	322
Total other comprehensive income (loss)	5,830	(3,385)
Comprehensive loss	$ (5,932)	$ (1,130)