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Long-Term Debt (Amortization Of Debt Discount) (Details) (USD $) In Thousands	3 Months Ended
	Sep. 30, 2011
Long-Term Debt [Abstract]
2012	$ 9,089
2013	12,868
2014	11,422
Amount amortized during period, total	$ 33,379

X

- Definition

Debt Discount Future Amortization Expenses Total

+ Details

Name:	caci_DebtDiscountFutureAmortizationExpensesTotal
Namespace Prefix:	caci
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Debt Discount Future Amortization Expenses Year One

+ Details

Name:	caci_DebtDiscountFutureAmortizationExpensesYearOne
Namespace Prefix:	caci
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Debt Discount Future Amortization Expenses Year Three

+ Details

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

X

- Definition

Debt Discount Future Amortization Expenses Year Two

+ Details

Name:	caci_DebtDiscountFutureAmortizationExpensesYearTwo
Namespace Prefix:	caci
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_LongTermDebtAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration