CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net loss	$ (52,301)	$ (10,769)	$ (68,886)	$ (21,383)
Other comprehensive income (loss):
Foreign currency translation	(17,905)	2,962	(7,425)	(356)
Change in unrealized gains/losses from cash flow hedges:
Change in fair value of cash flow hedges, net of tax	1,058	(762)	(127)	581
Adjustment for net gains/losses realized and included in net income, net of tax	(963)	286	(914)	262
Total change in unrealized gains/losses realized from cash flow hedges, net of tax	95	(476)	(1,041)	843
Total other comprehensive income (loss)	(17,810)	2,486	(8,466)	487
Total comprehensive loss	(70,111)	(8,283)	(77,352)	(20,896)
Noncontrolling interest in comprehensive loss of consolidated VIE, net of tax	(13,178)	(1,377)	(9,188)	(5,404)
Comprehensive loss attributable to Cubic, net of tax	$ (56,933)	$ (6,906)	$ (68,164)	$ (15,492)