SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014 item	Sep. 30, 2013	Sep. 30, 2012
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Net income (loss) attributable to Cubic	$ 32,805	$ 12,206	$ 16,092	$ 8,388	$ (37,186)	$ 18,381	$ 29,650	$ 14,241	$ 69,491	$ 25,086	$ 97,427
Average number of common shares outstanding									26,787	26,736	26,736
Effect of dilutive securities (in shares)									58	24
Weighted average shares - diluted									26,845	26,760	26,736
Basic (in dollars per share)	$ 1.22	$ 0.46	$ 0.60	$ 0.31	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 2.59	$ 0.94	$ 3.64
Diluted (in dollars per share)	$ 1.22	$ 0.45	$ 0.60	$ 0.31	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 2.59	$ 0.94	$ 3.64
Revenue Recognition
Number of estimates, a change in which could have material effect on financial position or results of operations									1
Allocation of arrangement consideration to the up-front deliverables									0
Revenue for the delivery of up-front units of accounting									$ 0
Number of transportation systems service contracts, which contain annual system usage incentives									1