ACQUISITIONS (Details) (USD $)	3 Months Ended								12 Months Ended									1 Months Ended		12 Months Ended							0 Months Ended	12 Months Ended		19 Months Ended				12 Months Ended							12 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	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Intific Inc.	Feb. 28, 2014 Intific Inc.	Feb. 28, 2013 Intific Inc.	Feb. 28, 2014 Intific Inc. Customer relationships	Feb. 28, 2014 Intific Inc. Technology	Feb. 28, 2014 Intific Inc. Backlog	May 31, 2014 ITMS	Nov. 30, 2013 ITMS	Sep. 30, 2014 ITMS	Nov. 26, 2013 ITMS	Nov. 26, 2013 ITMS Customer relationships	Nov. 26, 2013 ITMS Intellectual property	Nov. 26, 2013 ITMS Backlog	Nov. 26, 2013 ITMS Supplier relationships	Nov. 26, 2013 ITMS Agreements with Seller	Dec. 14, 2012 NEK Special Programs Group LLC (NEK)	Sep. 30, 2014 NEK Special Programs Group LLC (NEK)	Sep. 30, 2013 NEK Special Programs Group LLC (NEK)	Jun. 30, 2014 NEK Special Programs Group LLC (NEK)	Dec. 14, 2012 NEK Special Programs Group LLC (NEK) Customer relationships	Dec. 14, 2012 NEK Special Programs Group LLC (NEK) Corporate trade names	Dec. 14, 2012 NEK Special Programs Group LLC (NEK) Non-compete agreements	Sep. 30, 2014 NextBus, Inc.	Sep. 30, 2013 NextBus, Inc.	Jan. 24, 2013 NextBus, Inc.	Jan. 24, 2013 NextBus, Inc. Customer relationships	Jan. 24, 2013 NextBus, Inc. Corporate trade names	Jan. 24, 2013 NextBus, Inc. Technology	Jan. 24, 2013 NextBus, Inc. Backlog	Sep. 30, 2014 AIS	Sep. 30, 2013 AIS	Jul. 02, 2013 AIS	Jul. 02, 2013 AIS Customer relationships	Jul. 02, 2013 AIS Technology	Jul. 02, 2013 AIS Backlog	Sep. 30, 2014 PSMC	Sep. 30, 2013 PSMC	Jul. 02, 2013 PSMC	Jul. 02, 2013 PSMC Customer relationships	Jul. 02, 2013 PSMC Backlog
Acquisitions
Net sales	$ 396,366,000	$ 340,357,000	$ 354,492,000	$ 307,137,000	$ 340,776,000	$ 337,226,000	$ 368,609,000	$ 314,796,000	$ 1,398,352,000	$ 1,361,407,000	$ 1,404,084,000	$ 5,300,000								$ 43,700,000								$ 45,000,000	$ 31,600,000					$ 10,100,000	$ 7,800,000						$ 8,800,000	$ 2,000,000					$ 3,800,000	$ 1,700,000
Net income (loss) after taxes									69,580,000	25,269,000	97,631,000	(4,200,000)								(2,300,000)								600,000	(500,000)					600,000	400,000						800,000	100,000					100,000	100,000
Transaction and acquisition related costs												200,000								500,000									600,000						200,000
Compensation expense paid												3,700,000
Cost of acquisition net																											52,600,000
Fair value of consideration transferred												12,400,000								72,200,000							52,600,000
Cash consideration paid												11,200,000						3,200,000	69,000,000											7,800,000											2,000,000
Estimated current liability of additional cash consideration												1,200,000																		2,400,000
Increase potential customer claims liabilities																													3,500,000
Purchase price allocation
Amortizable intangible assets															2,000,000	700,000	700,000			19,500,000		15,700,000	1,600,000	5,700,000	600,000	1,300,000					13,300,000	4,900,000	200,000				8,800,000	1,000,000	1,300,000	1,700,000				1,400,000	900,000	600,000				600,000	100,000
Other intangible assets													200,000
Accounts receivable - billed																					4,400,000						3,100,000
Accounts receivable - unbilled																					6,900,000						7,700,000
Accounts receivable, net													1,500,000								(200,000)															2,200,000
Deferred tax assets														1,500,000
Accounts payable and accrued expenses													(600,000)								(4,600,000)						(3,000,000)									(1,100,000)
Deferred tax liabilities, net													(1,500,000)																							(3,300,000)
Deferred revenue																					(2,600,000)
Other net liabilities assumed																											(400,000)									(1,200,000)
Other net assets acquired													500,000								2,600,000																						(2,800,000)
Net identifiable assets acquired													5,000,000								31,400,000						25,800,000									9,400,000							100,000						700,000
Goodwill	184,141,000				136,094,000				184,141,000	136,094,000	146,933,000		7,400,000								40,800,000						26,800,000									10,800,000							1,900,000						600,000
Net assets acquired													12,400,000								72,200,000						52,600,000									20,200,000							2,000,000						1,300,000
Weighted average useful life of intangible assets												2 years								2 years								4 years						5 years
Estimated amortization expense related to the intangible assets
2015	18,705,000								18,705,000			900,000								5,900,000								2,900,000						1,500,000
2016	13,903,000								13,903,000			700,000								4,900,000								2,400,000						1,400,000
2017	9,859,000								9,859,000			600,000								3,900,000								1,900,000						1,300,000
2018	7,739,000								7,739,000			500,000								2,900,000								1,400,000						1,200,000
2019	4,481,000								4,481,000			200,000								900,000								800,000						1,100,000
Thereafter	8,931,000								8,931,000			100,000								100,000								2,800,000						3,600,000
Unaudited pro forma information
Net sales									1,411,000,000	1,460,600,000
Net income attributable to Cubic									69,200,000	31,200,000
Adjustments made for transaction expenses									$ 0