SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended			24 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014
Net sales:
Products									$ 607,226	$ 583,937	$ 562,310
Costs and expenses:
Products									451,295	424,682	425,793
Services									640,031	657,853	629,520
Selling, general and administrative expenses									212,518	181,672	165,230
Total costs and expenses									1,355,658	1,305,862	1,320,672
Operating income	$ 34,709	$ 10,293	$ 23,206	$ 7,179	$ 39,268	$ 19,215	$ 22,177	$ 11,830	75,387	92,490	40,735
Income before income taxes									71,911	89,411	39,771
Income taxes									48,997	19,831	14,502
Net income attributable to Cubic	$ 19,977	$ 8,780	$ (11,024)	5,152	$ 32,805	$ 12,206	$ 16,092	$ 8,388	22,885	69,491	25,086
Adjustments
Net sales:
Products				1,264					1,264
Costs and expenses:
Products				138					138
Services				438					438
Selling, general and administrative expenses				(1,385)					(1,385)
Total costs and expenses				(809)					(809)
Operating income				2,073					2,073	$ 2,400	$ 300	$ 2,100
Income before income taxes				2,073					2,073
Income taxes				789					789
Net income attributable to Cubic				1,284					1,284
Adjustments | Audit Committee Investigation Error
Net sales:
Products				747					747
Costs and expenses:
Operating income				747					747
Income before income taxes				747					747
Income taxes				299					299
Net income attributable to Cubic				448					448
Adjustments | Other Errors
Net sales:
Products				517					517
Costs and expenses:
Products				138					138
Services				438					438
Selling, general and administrative expenses				(1,385)					(1,385)
Total costs and expenses				(809)					(809)
Operating income				1,326					1,326
Income before income taxes				1,326					1,326
Income taxes				490					490
Net income attributable to Cubic				$ 836					$ 836