Long-Term Debt (Amortization Of Debt Discount) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2012
Long Term Debt [Abstract]
2013	$ 12,868
2014	11,421
Amount amortized during period, total	$ 24,289

Debt Discount Future Amortization Expenses Year Three

No definition available.

Name:	caci_DebtDiscountFutureAmortizationExpensesYearThree
Namespace Prefix:	caci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration