CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Net sales:
Net sales	$ 321,482	$ 337,339	$ 650,321	$ 642,598
Costs and expenses:
Selling, general and administrative expenses	78,294	66,195	144,209	129,181
Research and development	11,360	13,754	19,782	25,766
Amortization of purchased intangibles	16,493	12,395	26,582	22,960
Loss (gain) on sale of property, plant and equipment	40		(130)	0
Restructuring costs	3,807	1,757	5,382	3,749
Total costs and expenses	351,416	343,880	686,738	649,705
Operating loss	(29,934)	(6,541)	(36,417)	(7,107)
Other income (expenses):
Interest and dividend income	1,693	1,413	3,911	2,647
Interest expense	(8,219)	(4,531)	(13,582)	(8,563)
Loss on extinguishment of debt	(16,090)		(16,090)	0
Other income (expense), net	(19,664)	(3,602)	(19,791)	(8,355)
Loss from continuing operations before income taxes	(72,214)	(13,261)	(81,969)	(21,378)
Income tax provision	(19,784)	(3,831)	(13,538)	(1,334)
Loss from continuing operations	(52,430)	(9,430)	(68,431)	(20,044)
Net income (loss) from discontinued operations	129	(1,339)	(455)	(1,339)
Net loss	(52,301)	(10,769)	(68,886)	(21,383)
Less noncontrolling interest in net loss of VIE	(13,178)	(1,377)	(9,188)	(5,404)
Net loss attributable to Cubic	(39,123)	(9,392)	(59,698)	(15,979)
Amounts attributable to Cubic:
Net loss from continuing operations	(39,252)	(8,053)	(59,243)	(14,640)
Net income (loss) from discontinued operations	129	(1,339)	(455)	(1,339)
Net loss attributable to Cubic	$ (39,123)	$ (9,392)	$ (59,698)	$ (15,979)
Basic
Continuing operations attributable to Cubic (in dollars per share)	$ (1.25)	$ (0.26)	$ (1.89)	$ (0.49)
Discontinued operations (in dollars per share)		(0.04)	(0.01)	(0.04)
Basic earnings per share attributable to Cubic (in dollars per share)	(1.25)	(0.30)	(1.91)	(0.54)
Diluted
Continuing operations attributable to Cubic (in dollars per share)	(1.25)	(0.26)	(1.89)	(0.49)
Discontinued operations (in dollars per share)		(0.04)	(0.01)	(0.04)
Diluted earnings per share attributable to Cubic (in dollars per share)	$ (1.25)	$ (0.30)	$ (1.91)	$ (0.54)
Weighted average shares used in per share calculations:
Basic (in shares)	31,296	31,150	31,284	29,821
Diluted (in shares)	31,296	31,150	31,284	29,821
Products
Net sales:
Net sales	$ 187,494	$ 222,744	$ 388,098	$ 404,997
Costs and expenses:
Costs	153,002	167,567	319,845	293,052
Services
Net sales:
Net sales	133,988	114,595	262,223	237,601
Costs and expenses:
Costs	$ 88,420	$ 82,212	$ 171,068	$ 174,997