SUMMARY OF QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details 7) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Net income (loss) attributable to Cubic	$ (37,186)	$ 18,381	$ 29,650	$ 14,241	$ 21,912	$ 27,395	$ 25,856	$ 22,264	$ 25,086	$ 97,427	$ 86,044
Weighted average shares - basic	26,736	26,736	26,736	26,736	26,736	26,736	26,736	26,736	26,736,000	26,736,000	26,736,000
Effect of dilutive securities (in shares)									24,000
Weighted average shares - diluted	26,736	26,762	26,736	26,736	26,736	26,736	26,736	26,736	26,760,000	26,736,000	26,736,000
Net income (loss) per share attributable to Cubic, basic (in dollars per share)	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 0.82	$ 1.02	$ 0.97	$ 0.83	$ 0.94	$ 3.64	$ 3.22
Net income (loss) per share attributable to Cubic, diluted (in dollars per share)	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 0.82	$ 1.02	$ 0.97	$ 0.83	$ 0.94	$ 3.64	$ 3.22
Interim Financial Information
Net income (loss) attributable to Cubic	$ (37,186)	$ 18,381	$ 29,650	$ 14,241	$ 21,912	$ 27,395	$ 25,856	$ 22,264
Weighted average shares - basic	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000
Effect of dilutive securities (in shares)		26,000
Weighted average shares - diluted	26,736,000	26,762,000	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000	26,736,000
Net income (loss) per share attributable to Cubic, basic (in dollars per share)	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 0.82	$ 1.02	$ 0.97	$ 0.83
Net income (loss) per share attributable to Cubic, diluted (in dollars per share)	$ (1.39)	$ 0.69	$ 1.11	$ 0.53	$ 0.82	$ 1.02	$ 0.97	$ 0.83
Anti-dilutive employee share-based awards (in shares)	421,000