CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 142,799	$ 126,296	$ 135,919
Other comprehensive (loss) income:
Foreign currency translation adjustment	(19,961)	(11,943)	13,333
Effects of post-retirement adjustments	(170)	(237)	(257)
Change in fair value of interest rate swap agreements, net of tax	(5,992)	(2,398)	(3,643)
Other comprehensive (loss) income, net of tax	(26,123)	(14,578)	9,433
Comprehensive income	116,676	111,718	145,352
Noncontrolling interest		(101)	(603)
Comprehensive income attributable to CACI	$ 116,676	$ 111,617	$ 144,749