Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements Of Operations [Abstract]
Revenue	$ 3,681,990	$ 3,774,473	$ 3,577,780
Costs of revenue:
Direct costs	2,535,606	2,598,890	2,528,660
Indirect costs and selling expenses	821,465	819,772	741,652
Depreciation and amortization	54,078	55,962	56,067
Total costs of revenue	3,411,149	3,474,624	3,326,379
Income from operations	270,841	299,849	251,401
Interest expense and other, net	25,818	24,101	23,144
Income before income taxes	245,023	275,748	228,257
Income taxes	92,347	107,537	83,105
Net income including portion attributable to noncontrolling interest in earnings of joint venture	152,676	168,211	145,152
Noncontrolling interest in earnings of joint venture	(987)	(757)	(934)
Net income attributable to CACI	$ 151,689	$ 167,454	$ 144,218
Basic earnings per share	$ 6.59	$ 6.18	$ 4.76
Diluted earnings per share	$ 6.35	$ 5.96	$ 4.61
Weighted-average basic shares outstanding	23,010	27,077	30,281
Weighted-average diluted shares outstanding	23,885	28,111	31,300