CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Condensed Consolidated Statements Of Operations [Abstract]
Revenue	$ 900,393	$ 906,196	$ 2,658,844	$ 2,769,059
Costs of revenue:
Direct costs	605,780	623,125	1,813,874	1,908,411
Indirect costs and selling expenses	216,164	200,684	609,704	617,375
Depreciation and amortization	17,917	13,767	47,098	40,334
Total costs of revenue	839,861	837,576	2,470,676	2,566,120
Income from operations	60,532	68,620	188,168	202,939
Interest expense and other, net	11,480	6,295	28,324	19,308
Income before income taxes	49,052	62,325	159,844	183,631
Income taxes	18,043	23,838	60,533	69,174
Net income including portion attributable to noncontrolling interest in earnings of joint venture	31,009	38,487	99,311	114,457
Noncontrolling interest in earnings of joint venture	(181)	(120)	(529)	(706)
Net income attributable to CACI	$ 30,828	$ 38,367	$ 98,782	$ 113,751
Basic earnings per share (in dollars per share)	$ 1.31	$ 1.67	$ 4.22	$ 4.95
Diluted earnings per share (in dollars per share)	$ 1.19	$ 1.62	$ 3.89	$ 4.79
Weighted-average basic shares outstanding (in shares)	23,473	23,021	23,406	22,968
Weighted-average diluted shares outstanding (in shares)	25,973	23,706	25,368	23,740