CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net loss	$ (19,240)	$ (52,301)	$ (26,518)	$ (68,886)
Other comprehensive income (loss):
Foreign currency translation	(3,353)	(17,905)	8,184	(7,425)
Change in unrealized gains/losses from cash flow hedges:
Change in fair value of cash flow hedges, net of tax	9,453	1,058	9,408	(127)
Adjustment for net gains/losses realized and included in net income, net of tax	(212)	(963)	(397)	(914)
Total change in unrealized gains/losses realized from cash flow hedges, net of tax	9,241	95	9,011	(1,041)
Total other comprehensive income (loss)	5,888	(17,810)	17,195	(8,466)
Total comprehensive loss	(13,352)	(70,111)	(9,323)	(77,352)
Noncontrolling interest in comprehensive income (loss) of consolidated VIE, net of tax	16,777	(13,178)	22,494	(9,188)
Comprehensive loss attributable to Cubic, net of tax	$ (30,129)	$ (56,933)	$ (31,817)	$ (68,164)