CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 3,371	$ 39,883	$ 12,036
Other comprehensive income (loss):
Adjustment to pension liability, net of tax	(1,314)	(19,481)	5,540
Foreign currency translation	9,266	(11,286)	(8,126)
Change in unrealized gains/losses from cash flow hedges:
Change in fair value of cash flow hedges, net of tax	(15,191)	3,103	34
Adjustment for net gains/losses realized and included in net income, net of tax	(2,671)	(1,386)	929
Total change in unrealized gains/losses realized from cash flow hedges, net of tax	(17,862)	1,717	963
Total other comprehensive loss	(9,910)	(29,050)	(1,623)
Total comprehensive income (loss)	(6,539)	10,833	10,413
Noncontrolling interest in comprehensive income (loss) of consolidated VIE, net of tax	6,592	(9,811)	(274)
Comprehensive income (loss) attributable to Cubic, net of tax	$ (13,131)	$ 20,644	$ 10,687