CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Consolidated net loss	$ (15,828)	$ (86,932)
Foreign currency translation	1,164	5,107
Defined benefit plans:
Pension cost amortization	46	(54)
Foreign currency translation	37	241
Other comprehensive income, net of tax	1,247	5,294
Consolidated comprehensive loss	(14,581)	(81,638)
Less: Comprehensive (loss) income attributable to non-controlling interests	(440)	391
Comprehensive loss attributable to common stockholders	$ (14,141)	$ (82,029)