RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS (Details) (USD $)	3 Months Ended								12 Months Ended				0 Months Ended	3 Months Ended									12 Months Ended				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	Sep. 30, 2010	Feb. 20, 2014 Subsequent event item	Dec. 31, 2013 Subsequent event item	Sep. 30, 2013 Previously Reported	Jun. 30, 2013 Previously Reported	Mar. 31, 2013 Previously Reported	Dec. 31, 2012 Previously Reported	Sep. 30, 2012 Previously Reported	Jun. 30, 2012 Previously Reported	Mar. 31, 2012 Previously Reported	Dec. 31, 2011 Previously Reported	Sep. 30, 2013 Previously Reported	Sep. 30, 2012 Previously Reported	Sep. 30, 2011 Previously Reported	Sep. 30, 2010 Previously Reported	Sep. 30, 2013 Adjustments	Jun. 30, 2013 Adjustments	Mar. 31, 2013 Adjustments	Dec. 31, 2012 Adjustments	Sep. 30, 2012 Adjustments	Jun. 30, 2012 Adjustments	Mar. 31, 2012 Adjustments	Dec. 31, 2011 Adjustments	Sep. 30, 2013 Adjustments	Sep. 30, 2012 Adjustments	Sep. 30, 2011 Adjustments	Sep. 30, 2010 Adjustments
Decrease in retained earnings																																						$ 1,700,000
Decrease in accumulated other comprehensive loss																																						400,000
Retained earnings	740,002,000	780,397,000	762,016,000	735,574,000	721,333,000	702,630,000	675,235,000	652,587,000	740,002,000	721,333,000		551,765,000			728,424,000	769,803,000	751,439,000	727,489,000	715,043,000	697,164,000	670,443,000	650,254,000	728,424,000	715,043,000		553,452,000	11,578,000	10,594,000	10,577,000	8,085,000	6,290,000	5,466,000	4,792,000	2,333,000	11,578,000	6,290,000		(1,687,000)
Net income	(37,186,000)	18,381,000	29,650,000	14,241,000	21,912,000	27,395,000	25,856,000	22,264,000	25,086,000	97,427,000	86,044,000				(38,170,000)	18,364,000	27,158,000	12,446,000	21,088,000	26,721,000	23,397,000	20,694,000	19,798,000	91,900,000	83,594,000		984,000	17,000	2,492,000	1,795,000	824,000	674,000	2,459,000	1,570,000	5,288,000	5,527,000	2,450,000
Number of errors in recognition of revenue													2
Number of contracts for which errors identified related to revenue recognition														2
Net sales:
Products	132,874,000	127,682,000	167,036,000	134,718,000	171,632,000	194,613,000	156,891,000	154,192,000	562,310,000	677,328,000	601,093,000				136,216,000	131,557,000	164,968,000	135,701,000	164,458,000	189,743,000	155,776,000	153,310,000	568,442,000	663,287,000	600,933,000		(3,342,000)	(3,875,000)	2,068,000	(983,000)	7,174,000	4,870,000	1,115,000	882,000	(6,132,000)	14,041,000	160,000
Services	207,902,000	209,544,000	201,573,000	180,078,000	197,623,000	176,529,000	186,939,000	165,665,000	799,097,000	726,756,000	700,491,000				206,386,000	208,888,000	199,337,000	177,670,000	195,229,000	175,654,000	183,869,000	163,456,000	792,281,000	718,208,000	694,648,000		1,516,000	656,000	2,236,000	2,408,000	2,394,000	875,000	3,070,000	2,209,000	6,816,000	8,548,000	5,843,000
Total net sales	340,776,000	337,226,000	368,609,000	314,796,000	369,255,000	371,142,000	343,830,000	319,857,000	1,361,407,000	1,404,084,000	1,301,584,000				342,602,000	340,445,000	364,305,000	313,371,000	359,687,000	365,397,000	339,645,000	316,766,000	1,360,723,000	1,381,495,000	1,295,581,000		(1,826,000)	(3,219,000)	4,304,000	1,425,000	9,568,000	5,745,000	4,185,000	3,091,000	684,000	22,589,000	6,003,000
Costs and expenses:
Products	115,750,000	91,011,000	119,145,000	99,887,000	121,479,000	123,072,000	107,432,000	114,195,000	425,793,000	466,178,000	418,504,000				117,530,000	93,946,000	117,123,000	100,895,000	113,009,000	118,431,000	106,684,000	113,449,000	429,494,000	451,573,000	418,279,000		(1,780,000)	(2,935,000)	2,022,000	(1,008,000)	8,470,000	4,641,000	748,000	746,000	(3,701,000)	14,605,000	225,000
Services	167,851,000	164,278,000	153,320,000	144,071,000	163,059,000	153,640,000	145,696,000	131,567,000	629,520,000	593,962,000	564,765,000				167,757,000	164,458,000	153,766,000	143,851,000	164,060,000	153,552,000	145,642,000	131,408,000	629,832,000	594,662,000	564,062,000		94,000	(180,000)	(446,000)	220,000	(1,001,000)	88,000	54,000	159,000	(312,000)	(700,000)	703,000
Selling, general and administrative expenses	38,837,000	44,130,000	41,320,000	40,943,000	43,179,000	42,751,000	43,039,000	35,220,000	165,230,000	164,189,000	159,791,000				38,429,000	44,130,000	41,320,000	40,997,000	42,678,000	42,751,000	43,039,000	35,220,000	164,876,000	163,688,000	159,791,000		408,000			(54,000)	501,000				354,000	501,000
Restructuring costs	1,941,000	114,000	6,084,000						8,139,000						1,941,000	114,000	6,084,000						8,139,000
Impairment of goodwill	50,865,000								50,865,000						50,865,000								50,865,000
Research and development	5,099,000	6,426,000	7,098,000	5,822,000	7,327,000	8,427,000	8,072,000	4,896,000	24,445,000	28,722,000	25,260,000				5,099,000	6,426,000	7,098,000	5,822,000	7,327,000	8,427,000	8,072,000	4,896,000	24,445,000	28,722,000	25,260,000
Amortization of purchased intangibles	4,488,000	4,362,000	4,266,000	3,564,000	3,471,000	3,650,000	3,668,000	4,039,000	16,680,000	14,828,000	14,681,000				4,488,000	4,362,000	4,266,000	3,564,000	3,471,000	3,650,000	3,668,000	4,039,000	16,680,000	14,828,000	14,681,000
Total costs and expenses	384,831,000	310,321,000	331,233,000	294,287,000	338,515,000	331,540,000	307,907,000	289,917,000	1,320,672,000	1,267,879,000	1,183,001,000				386,109,000	313,436,000	329,657,000	295,129,000	330,545,000	326,811,000	307,105,000	289,012,000	1,324,331,000	1,253,473,000	1,182,073,000		(1,278,000)	(3,115,000)	1,576,000	(842,000)	7,970,000	4,729,000	802,000	905,000	(3,659,000)	14,406,000	928,000
Operating income	(44,055,000)	26,905,000	37,376,000	20,509,000	30,740,000	39,602,000	35,923,000	29,940,000	40,735,000	136,205,000	118,583,000				(43,507,000)	27,009,000	34,648,000	18,242,000	29,142,000	38,586,000	32,540,000	27,754,000	36,392,000	128,022,000	113,508,000		(548,000)	(104,000)	2,728,000	2,267,000	1,598,000	1,016,000	3,383,000	2,186,000	4,343,000	8,183,000	5,075,000
Other income (expenses):
Interest and dividend income	297,000	530,000	312,000	437,000	571,000	697,000	964,000	762,000	1,576,000	2,994,000	2,568,000				297,000	530,000	312,000	437,000	571,000	697,000	964,000	762,000	1,576,000	2,994,000	2,568,000
Interest expense	(980,000)	(925,000)	(657,000)	(865,000)	(664,000)	(234,000)	(344,000)	(360,000)	(3,427,000)	(1,602,000)	(1,541,000)				(977,000)	(922,000)	(654,000)	(862,000)	(651,000)	(221,000)	(331,000)	(347,000)	(3,415,000)	(1,550,000)	(1,461,000)		(3,000)	(3,000)	(3,000)	(3,000)	(13,000)	(13,000)	(13,000)	(13,000)	(12,000)	(52,000)	(80,000)
Other income (expense), net	1,651,000	(813,000)	(53,000)	102,000	271,000	(950,000)	122,000	923,000	887,000	366,000	863,000				397,000	(813,000)	(53,000)	102,000	726,000	(950,000)	122,000	923,000	(367,000)	821,000	1,662,000		1,254,000				(455,000)				1,254,000	(455,000)	(799,000)
Income before income taxes	(43,087,000)	25,697,000	36,978,000	20,183,000	30,918,000	39,115,000	36,665,000	31,265,000	39,771,000	137,963,000	120,473,000				(43,790,000)	25,804,000	34,253,000	17,919,000	29,788,000	38,112,000	33,295,000	29,092,000	34,186,000	130,287,000	116,277,000		703,000	(107,000)	2,725,000	2,264,000	1,130,000	1,003,000	3,370,000	2,173,000	5,585,000	7,676,000	4,196,000
Income taxes	(5,935,000)	7,292,000	7,276,000	5,869,000	8,951,000	11,667,000	10,758,000	8,956,000	14,502,000	40,332,000	34,119,000				(5,654,000)	7,416,000	7,043,000	5,400,000	8,645,000	11,338,000	9,847,000	8,353,000	14,205,000	38,183,000	32,373,000		(281,000)	(124,000)	233,000	469,000	306,000	329,000	911,000	603,000	297,000	2,149,000	1,746,000
Net income	(37,152,000)	18,405,000	29,702,000	14,314,000	21,967,000	27,448,000	25,907,000	22,309,000	25,269,000	97,631,000	86,354,000				(38,136,000)	18,388,000	27,210,000	12,519,000	21,143,000	26,774,000	23,448,000	20,739,000	19,981,000	92,104,000	83,904,000		984,000	17,000	2,492,000	1,795,000	824,000	674,000	2,459,000	1,570,000	5,288,000	5,527,000	2,450,000
Less noncontrolling interest in income of VIE	34,000	24,000	52,000	73,000	55,000	53,000	51,000	45,000	183,000	204,000	310,000				34,000	24,000	52,000	73,000	55,000	53,000	51,000	45,000	183,000	204,000	310,000
Net income attributable to Cubic	$ (37,186,000)	$ 18,381,000	$ 29,650,000	$ 14,241,000	$ 21,912,000	$ 27,395,000	$ 25,856,000	$ 22,264,000	$ 25,086,000	$ 97,427,000	$ 86,044,000				$ (38,170,000)	$ 18,364,000	$ 27,158,000	$ 12,446,000	$ 21,088,000	$ 26,721,000	$ 23,397,000	$ 20,694,000	$ 19,798,000	$ 91,900,000	$ 83,594,000		$ 984,000	$ 17,000	$ 2,492,000	$ 1,795,000	$ 824,000	$ 674,000	$ 2,459,000	$ 1,570,000	$ 5,288,000	$ 5,527,000	$ 2,450,000
Net income 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				$ (1.43)	$ 0.69	$ 1.02	$ 0.47	$ 0.79	$ 1.00	$ 0.88	$ 0.77	$ 0.74	$ 3.44	$ 3.13		$ 0.04	$ 0.00	$ 0.09	$ 0.06	$ 0.03	$ 0.02	$ 0.09	$ 0.06	$ 0.20	$ 0.20	$ 0.09
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				$ (1.43)	$ 0.69	$ 1.02	$ 0.47	$ 0.79	$ 1.00	$ 0.88	$ 0.77	$ 0.74	$ 3.44	$ 3.13		$ 0.04	$ 0.00	$ 0.09	$ 0.06	$ 0.03	$ 0.02	$ 0.09	$ 0.06	$ 0.20	$ 0.20	$ 0.09
Weighted average shares used in per share calculations:
Basic (in shares)	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				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
Diluted (in shares)	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				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