CACI International (CACI) 10-Q 6 Feb 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Dec. 31, 2013	Feb. 03, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'CACI INTERNATIONAL INC /DE/	'
Entity Central Index Key	'0000016058	'
Trading Symbol	'caci	'
Current Fiscal Year End Date	'--06-30	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	23,465,038
Document Type	'10-Q	'
Document Period End Date	31-Dec-13	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Condensed Consolidated Statements Of Operations [Abstract]	'	'	'	'
Revenue	$894,186	$931,627	$1,758,451	$1,862,863
Costs of revenue:	'	'	'	'
Direct costs	606,672	639,649	1,208,094	1,285,286
Indirect costs and selling expenses	204,830	209,068	393,540	416,691
Depreciation and amortization	16,230	13,328	29,181	26,567
Total costs of revenue	827,732	862,045	1,630,815	1,728,544
Income from operations	66,454	69,582	127,636	134,319
Interest expense and other, net	9,456	6,231	16,844	13,013
Income before income taxes	56,998	63,351	110,792	121,306
Income taxes	22,088	23,371	42,490	45,336
Net income including portion attributable to noncontrolling interest in earnings of joint venture	34,910	39,980	68,302	75,970
Noncontrolling interest in earnings of joint venture	52	-304	-348	-586
Net income attributable to CACI	$34,962	$39,676	$67,954	$75,384
Basic earnings per share (in dollars per share)	$1.49	$1.74	$2.91	$3.29
Diluted earnings per share (in dollars per share)	$1.38	$1.69	$2.71	$3.17
Weighted-average basic shares outstanding (in shares)	23,433	22,852	23,374	22,942
Weighted-average diluted shares outstanding (in shares)	25,297	23,537	25,066	23,758

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements Of Comprehensive Income [Abstract]	'	'	'	'
Net income including portion attributable to noncontrolling interest in earnings of joint venture	$34,910	$39,980	$68,302	$75,970
Foreign currency translation adjustment	2,659	295	9,455	3,840
Change in fair value of interest rate swap agreements, net	36	-36	-195	-626
Effects of post-retirement adjustments	'	'	208	'
Comprehensive income including portion attributable to noncontrolling interest in earnings of joint venture	37,605	40,239	77,770	79,184
Noncontrolling interest in earnings of joint venture	52	-304	-348	-586
Comprehensive income attributable to CACI	$37,657	$39,935	$77,422	$78,598

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$98,173	$64,337
Accounts receivable, net	711,012	614,616
Deferred income taxes	14,789	18,953
Prepaid expenses and other current assets	47,618	25,875
Total current assets	871,592	723,781
Goodwill	2,186,221	1,476,965
Intangible assets, net	252,408	104,188
Property and equipment, net	70,181	65,510
Supplemental retirement savings plan assets	86,242	83,419
Accounts receivable, long-term	10,929	11,330
Other long-term assets	41,786	31,878
Total assets	3,519,359	2,497,071
Current liabilities:	'	'
Current portion of long-term debt	41,562	295,517
Accounts payable	112,485	133,073
Accrued compensation and benefits	181,603	166,538
Other accrued expenses and current liabilities	158,998	147,366
Total current liabilities	494,648	742,494
Long-term debt, net of current portion	1,409,006	300,790
Supplemental retirement savings plan obligations, net of current portion	78,571	74,757
Deferred income taxes	191,943	119,885
Other long-term liabilities	59,025	51,573
Total liabilities	2,233,193	1,289,499
COMMITMENTS AND CONTINGENCIES	'	'
Shareholders' equity:	'	'
Preferred stock $0.10 par value, 10,000 shares authorized, no shares issued	'	'
Common stock $0.10 par value, 80,000 shares authorized, 41,388 and 41,172 shares issued, respectively	4,139	4,117
Additional paid-in capital	531,923	530,154
Retained earnings	1,325,592	1,257,638
Accumulated other comprehensive loss	-347	-9,815
Treasury stock, at cost (17,942 and 17,950 shares, respectively)	-577,169	-577,191
Total CACI shareholders' equity	1,284,138	1,204,903
Noncontrolling interest in joint venture	2,028	2,669
Total shareholders' equity	1,286,166	1,207,572
Total liabilities and shareholders' equity	$3,519,359	$2,497,071

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) (USD $)	Dec. 31, 2013	Jun. 30, 2013
Condensed Consolidated Balance Sheets [Abstract]	'	'
Preferred stock, par value (in dollars per share)	$0.10	$0.10
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	'	'
Common stock, par value (in dollars per share)	$0.10	$0.10
Common stock, shares authorized	80,000	80,000
Common stock, shares issued	41,388	41,172
Treasury stock, shares at cost	17,942	17,950

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net income including portion attributable to noncontrolling interest in earnings of joint venture	$68,302	$75,970
Reconciliation of net income including portion attributable to noncontrolling interest to net cash provided by operating activities:	'	'
Depreciation and amortization	29,181	26,567
Non-cash interest expense	6,769	6,325
Amortization of deferred financing costs	1,129	1,012
Loss on extinguishment of debt	4,116	'
Stock-based compensation expense	5,785	5,901
Deferred income tax expense	14,957	9,866
Distribution of earnings from unconsolidated joint venture	'	3,545
Equity in earnings of unconsolidated joint ventures	-947	-1,319
Changes in operating assets and liabilities, net of effect of business acquisitions:	'	'
Accounts receivable, net	-6,178	39,114
Prepaid expenses and other assets	-6,504	-14,749
Accounts payable and other accrued expenses	-49,913	-26,794
Accrued compensation and benefits	-21,816	-27,730
Income taxes payable and receivable	-4,545	-13,940
Supplemental retirement savings plan obligations and other long-term liabilities	4,241	12,267
Net cash provided by operating activities	44,577	96,035
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Capital expenditures	-7,143	-10,032
Cash paid for business acquisitions, net of cash acquired	-835,684	-100,062
Investment in unconsolidated joint venture	'	-1,421
Other	-893	-1,012
Net cash used in investing activities	-843,720	-112,527
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from borrowings under bank credit facilities	1,119,000	707,500
Principal payments made under bank credit facilities	-269,000	-546,250
Payment of financing costs under bank credit facilities	-13,222	-612
Proceeds from employee stock purchase plans	1,849	2,495
Proceeds from exercise of stock options	'	4,742
Repurchases of common stock	-1,884	-125,411
Payment of taxes for equity transactions	-7,936	-4,489
Other	3,026	-120
Net cash provided by financing activities	831,833	37,855
Effect of exchange rate changes on cash and cash equivalents	1,146	406
Net increase in cash and cash equivalents	33,836	21,769
Cash and cash equivalents, beginning of period	64,337	15,740
Cash and cash equivalents, end of period	98,173	37,509
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION	'	'
Cash paid during the period for income taxes, net of refunds	29,414	48,645
Cash paid during the period for interest	7,817	6,684
Non-cash financing and investing activities:	'	'
Landlord-financed leasehold improvements	'	$2,216

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Dec. 31, 2013
Basis Of Presentation [Abstract]	'
Basis of Presentation	'
	1	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements of CACI International Inc and subsidiaries (CACI or the Company) have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) and include the assets, liabilities, results of operations, comprehensive income and cash flows for the Company, including its subsidiaries and joint ventures that are more than 50 percent owned or otherwise controlled by the Company. Certain information and note disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information presented not misleading. All intercompany balances and transactions have been eliminated in consolidation.
	The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and amounts included in other current assets and current liabilities that meet the definition of a financial instrument approximate fair value because of the short-term nature of these amounts. The fair value of the Company’s debt outstanding as of December 31, 2013 under its bank credit facility approximates its carrying value. The fair value of the Company’s debt under its bank credit facility was estimated using Level 2 inputs based on market data on companies with a corporate rating similar to CACI’s that have recently priced credit facilities. The fair value of the Company’s $300.0 million of 2.125 percent convertible senior subordinated notes issued May 16, 2007 and that mature on May 16, 2014 (the Notes) is based on quoted market prices using Level 1 inputs. See Notes 4 and 10.
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments and reclassifications (all of which are of a normal, recurring nature) that are necessary for the fair presentation of the periods presented. It is suggested that these unaudited consolidated financial statements be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s latest annual report to the SEC on Form 10-K for the year ended June 30, 2013. The results of operations for the three and six months ended December 31, 2013 are not necessarily indicative of the results to be expected for any subsequent interim period or for the full fiscal year.
	Certain reclassifications have been made to the prior period’s financial statements to conform to the current presentation.

Acquisition

Acquisition	6 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Acquisition	'
	2	Acquisition
	On November 15, 2013, CACI completed the acquisition of Six3 Systems Holdings II, Inc. (Six3 Systems). Six3 Systems provides highly specialized support to the national security community in the areas of cyber and signals intelligence; intelligence, surveillance, and reconnaissance; and intelligence operations. In connection with the acquisition, on November 15, 2013, CACI entered into a fifth amendment (the Amendment) to its credit agreement dated as of October 21, 2010 (the Credit Agreement). The Amendment modified the Credit Agreement to allow for the incurrence of $700 million in additional term loans and a $100 million increase in the revolving facility to finance the acquisition of Six3 Systems.
	The initial purchase consideration paid at closing to acquire Six3 Systems was $820.0 million plus $25.8 million representing the estimated cash and net working capital adjustment, as defined in the agreement. Of the payment made at closing, $40.0 million was deposited into an escrow account pending final determination of the net cash and working capital acquired and to secure the sellers’ indemnification obligations (the Indemnification Amount). Any remaining Indemnification Amount at the end of the indemnification period not encumbered as a result of one or more indemnification claims will be distributed to the sellers.
	CACI is in the process of finalizing its valuation of the assets acquired and liabilities assumed. The fair values assigned to the intangible assets acquired were based on preliminary estimates, assumptions, and other information compiled by management, including independent valuations that utilized established valuation techniques. Based on the Company’s provisional valuation, the total estimated consideration of $847.3 million, which includes an estimated final cash and net working capital adjustment of $1.4 million, has been allocated to assets acquired (including identifiable intangible assets and goodwill) and liabilities assumed (including deferred taxes on identifiable intangible assets that are not deductible for income tax purposes), as follows (in thousands):
	Cash		$	10,166
	Accounts receivable			80,615
	Prepaid expenses and other current assets			17,551
	Property and equipment			8,051
	Customer contracts and customer relationships			164,300
	Goodwill			702,747
	Other assets			598
	Accounts payable			(9,047	)
	Accrued expenses and other current liabilities			(63,417	)
	Long-term deferred tax liability			(64,275	)
	Total estimated consideration		$	847,289
	The estimated value attributed to customer contracts and customer relationships is being amortized on an accelerated basis over approximately 14 years. Of the value attributed to goodwill, customer contracts and customer relationships, $55.1 million is deductible for income tax purposes.
	From the date of acquisition through December 31, 2013, Six3 Systems generated $48.9 million of revenue and $0.1 million of net income. Six3 Systems’ net income includes the impact of $2.8 million of amortization of customer contracts and customer relationships, as well as $0.8 million in expense associated with retention bonuses associated with retention agreements with certain Six3 executives. The agreements provide for a payment upon the one and two year anniversaries of the acquisition, dependent upon continued employment by the executive as an employee of the Company. Six3 Systems’ net income does not include the impact of acquisition-related expenses incurred by CACI.
	CACI incurred $9.7 million of acquisition-related expenses during the three months ended December 31, 2013, including expenses and a loss on extinguishment associated with the additional indebtedness incurred in connection with the Amendment to the Credit Facility described above. These expenses are included in indirect costs and selling expenses. See Note 4 for additional information on the loss on extinguishment.
	The following pro forma results are prepared for comparative purposes only and do not necessarily reflect the results that would have occurred had the acquisition occurred at the beginning of the years presented or the results which may occur in the future. The following unaudited pro forma results of operations assume the Six3 Systems acquisition had occurred on July 1, 2012 (in thousands except per share amounts):
			Six Months Ended
			December 31,
			2013			2012
	Revenue		$	1,936,283		$	2,072,832
	Net income			82,224			73,635
	Basic earnings per share			3.52			3.21
	Diluted earnings per share			3.28			3.1

Intangible_Assets

Intangible Assets	6 Months Ended
	Dec. 31, 2013
Intangible Assets [Abstract]	'
Intangible Assets	'
	3	Intangible Assets
	Intangible assets increased due to the Six3 Systems acquisition (see Note 2) and consisted of the following (in thousands):
			December 31,			June 30,
			2013			2013
	Customer contracts and related customer relationships		$	516,541		$	351,349
	Acquired technologies			27,177			27,177
	Covenants not to compete			3,449			3,401
	Other			1,593			1,639
	Intangible assets			548,760			383,566
	Less accumulated amortization			(296,352	)		(279,378	)
	Total intangible assets, net		$	252,408		$	104,188
	Intangible assets are primarily amortized on an accelerated basis over periods ranging from one to fifteen years. The weighted-average period of amortization for all customer contracts and related customer relationships as of December 31, 2013 is 11.5 years, and the weighted-average remaining period of amortization is 11.8 years. The weighted-average period of amortization for acquired technologies as of December 31, 2013 is 6.7 years, and the weighted-average remaining period of amortization is 5.0 years.
	Expected amortization expense for the remainder of the fiscal year ending June 30, 2014, and for each of the fiscal years thereafter, is as follows (in thousands):
	Fiscal year ending June 30,		Amount
	2014 (six months)		$	22,142
	2015			39,343
	2016			32,671
	2017			29,361
	2018			25,312
	Thereafter			103,579
	Total intangible assets, net		$	252,408

Longterm_Debt

Long-term Debt	6 Months Ended
	Dec. 31, 2013
Long-Term Debt [Abstract]	'
Long-term Debt	'
	4	Long-term Debt
	Long-term debt consisted of the following (in thousands):
			December 31,			June 30,
			2013			2013
	Convertible notes payable		$	300,000		$	300,000
	Bank credit facility – Term Loan			831,250			131,250
	Bank credit facility – Revolving Facility			330,000			180,000
	Principal amount of long-term debt			1,461,250			611,250
	Less unamortized discount			(4,653	)		(11,421	)
	Less unamortized debt issuance costs			(6,029	)		(3,522	)
	Total long-term debt			1,450,568			596,307
	Less current portion			(41,562	)		(295,517	)
	Long-term debt, net of current portion		$	1,409,006		$	300,790
	Bank Credit Facility
	As of December 31, 2013, the Company has a $1.7 billion credit facility (the Credit Facility), which consists of an $850.0 million revolving credit facility (the Revolving Facility) and an $831.3 million term loan (the Term Loan). The Revolving Facility has subfacilities of $50.0 million for same-day swing line loan borrowings and $25.0 million for stand-by letters of credit. At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage, calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals. The Credit Facility is available to refinance existing indebtedness and for general corporate purposes, including working capital expenses and capital expenditures. The Credit Facility was amended on November 15, 2013 in connection with the Company’s acquisition of Six3 Systems. See Note 2. Prior to the amendment, the Credit Facility consisted of a $750.0 million revolving credit facility and a $150.0 million term loan. In connection with the amendment, which allowed for the incurrence of $700.0 million of additional term loans and a $100.0 million increase in the Revolving Facility, the Company evaluated each creditor with ownership in the debt before and after the additional borrowings to determine whether the additional borrowings should be accounted for as a modification or an extinguishment of debt as it relates to each individual holder. As a result of this analysis, the Company recorded a $4.1 million loss on extinguishment within indirect costs and selling expenses in the three month period ended December 31, 2013. The Credit Facility matures on November 15, 2018.
	The Revolving Facility is a secured facility that permits continuously renewable borrowings of up to $850.0 million. As of December 31, 2013, the Company had $330.0 million outstanding under the Revolving Facility, no borrowings on the swing line and outstanding letters of credit of $0.5 million. The Company pays a quarterly facility fee for the unused portion of the Revolving Facility.
	The Term Loan is a five-year secured facility under which principal payments are due in quarterly installments of $10.4 million through December 31, 2016 and $20.8 million thereafter until the balance is due in full on November 15, 2018.
	The interest rates applicable to loans under the Credit Facility are floating interest rates that, at the Company’s option, equal a base rate or a Eurodollar rate plus, in each case, an applicable margin based upon the Company’s consolidated total leverage ratio. As of December 31, 2013, the effective interest rate, including the impact of the Company’s floating-to-fixed interest rate swap agreements and excluding the effect of amortization of debt financing costs, for the outstanding borrowings under the Credit Facility was 2.28 percent.
	The Credit Facility requires the Company to comply with certain financial covenants, including a maximum senior secured leverage ratio, a maximum total leverage ratio and a minimum fixed charge coverage ratio. The Credit Facility also includes customary negative covenants restricting or limiting the Company’s ability to guarantee or incur additional indebtedness, grant liens or other security interests to third parties, make loans or investments, transfer assets, declare dividends or redeem or repurchase capital stock or make other distributions, prepay subordinated indebtedness and engage in mergers, acquisitions or other business combinations, in each case except as expressly permitted under the Credit Facility. Since the inception of the Credit Facility, the Company has been in compliance with all of the financial covenants. A majority of the Company’s assets serve as collateral under the Credit Facility.
	The Company has capitalized $18.1 million of debt issuance costs associated with the Credit Facility. All debt issuance costs are being amortized from the date incurred to the expiration date of the Credit Facility. As of December 31, 2013, $5.8 million of the unamortized balance is included in long-term debt and $7.0 million is included in other long-term assets.
	Convertible Notes Payable
	Effective May 16, 2007, the Company issued the Notes in a private placement. The Notes were issued at par value and are subordinate to the Company’s senior secured debt. Interest on the Notes is payable on May 1 and November 1 of each year. The Notes mature on May 1, 2014.
	Holders may convert their notes at a conversion rate of 18.2989 shares of CACI common stock for each $1,000 of note principal (an initial conversion price of $54.65 per share) under the following circumstances: (1) if the last reported sale price of CACI stock is greater than or equal to 130 percent of the applicable conversion price for at least 20 trading days in the period of 30 consecutive trading days ending on the last trading day of the preceding fiscal quarter; (2) during the five consecutive business day period immediately after any ten consecutive trading day period (the note measurement period) in which the average of the trading price per $1,000 principal amount of convertible note was equal to or less than 97 percent of the average product of the closing price of a share of the Company’s common stock and the conversion rate of each date during the note measurement period; (3) upon the occurrence of certain corporate events constituting a fundamental change, as defined in the indenture governing the Notes; or (4) during the last three-month period prior to maturity. CACI is required to satisfy 100 percent of the principal amount of these notes solely in cash, with any amounts above the principal amount to be satisfied in common stock. As of December 31, 2013, the condition in (1) above was satisfied and, accordingly, holders of the Notes may exercise the conversion option beginning on January 1, 2014.
	In the event of a fundamental change, as defined in the indenture governing the Notes, holders may require the Company to repurchase the Notes at a price equal to the principal amount plus any accrued interest. Also, if certain fundamental changes occur prior to maturity, the Company will in certain circumstances increase the conversion rate by a number of additional shares of common stock or, in lieu thereof, the Company may in certain circumstances elect to adjust the conversion rate and related conversion obligation so that these notes are convertible into shares of the acquiring or surviving company. The Company is not permitted to redeem the Notes.
	The Company separately accounts for the liability and the equity (conversion option) components of the Notes and recognizes interest expense on the Notes using an interest rate in effect for comparable debt instruments that do not contain conversion features. The effective interest rate for the Notes excluding the conversion option was determined to be 6.9 percent.
	The fair value of the liability component of the Notes was calculated to be $221.9 million at May 16, 2007, the date of issuance. The excess of the $300.0 million of gross proceeds over the $221.9 million fair value of the liability component, or $78.1 million, represents the fair value of the equity component, which was recorded, net of income tax effect, as additional paid-in capital within shareholders’ equity. This $78.1 million difference represents a debt discount that is amortized over the seven-year term of the Notes as a non-cash component of interest expense. For the three and six months ended December 31, 2013 and 2012, the components of interest expense related to the Notes were as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2013			2012			2013			2012
	Coupon interest		$	1,594		$	1,594		$	3,188		$	3,188
	Non-cash amortization of discount			3,409			3,185			6,769			6,325
	Amortization of issuance costs			205			205			410			410
	Total		$	5,208		$	4,984		$	10,367		$	9,923
	The balance of the unamortized discount as of December 31, 2013 and June 30, 2013, was $4.7 million and $11.4 million, respectively. The balance as of December 31, 2013 will be amortized as additional, non-cash interest expense over the remaining term of the Notes (through May 1, 2014) using the effective interest method.
	The fair value of the Notes as of December 31, 2013 was $405.5 million based on quoted market values.
	The contingently issuable shares that may result from the conversion of the Notes were included in CACI’s diluted share count for the three months ended December 31, 2013 and 2012 because CACI’s average stock price during both three month periods was above the conversion price of $54.65 per share. Of total debt issuance costs of $7.8 million, $5.8 million is being amortized to interest expense over seven years. The remaining $2.0 million of debt issuance costs attributable to the embedded conversion option was recorded in additional paid-in capital. Upon closing of the sale of the Notes, $45.5 million of the net proceeds was used to concurrently repurchase one million shares of CACI’s common stock.
	In connection with the issuance of the Notes, the Company purchased in a private transaction at a cost of $84.4 million call options (the Call Options) to purchase approximately 5.5 million shares of its common stock at a price equal to the conversion price of $54.65 per share. The cost of the Call Options was recorded as a reduction of additional paid-in capital. The Call Options allow CACI to receive shares of its common stock from the counterparties equal to the amount of common stock related to the excess conversion value that CACI would pay the holders of the Notes upon conversion.
	For income tax reporting purposes, the Notes and the Call Options are integrated. This created an original issue discount for income tax reporting purposes, and therefore the cost of the Call Options is being accounted for as interest expense over the term of the Notes for income tax reporting purposes. The associated income tax benefit of $32.8 million to be realized for income tax reporting purposes over the term of the Notes was recorded as an increase in additional paid-in capital and a long-term deferred tax asset. The majority of this deferred tax asset is offset in the Company’s balance sheet by the $30.7 million deferred tax liability associated with the non-cash interest expense to be recorded for financial reporting purposes.
	In addition, the Company sold warrants (the Warrants) to issue approximately 5.5 million shares of CACI common stock at an exercise price of $68.31 per share. The proceeds from the sale of the Warrants totaled $56.5 million and were recorded as an increase to additional paid-in capital.
	On a combined basis, the Call Options and the Warrants are intended to reduce the potential dilution of CACI’s common stock in the event that the Notes are converted by effectively increasing the conversion price of these notes from $54.65 to $68.31. The Call Options are anti-dilutive and are therefore excluded from the calculation of diluted shares outstanding. The Warrants result in additional diluted shares outstanding when CACI’s average common stock price exceeds $68.31. The Call Options and the Warrants are separate and legally distinct instruments that bind CACI and the counterparties and have no binding effect on the holders of the Notes.
	The Company has classified the Notes as long-term on the accompanying balance sheet as of December 31, 2013 as the Company has sufficient borrowing capacity under the Credit Facility to repay the Notes when they come due.
	Cash Flow Hedges
	The Company periodically uses derivative financial instruments as part of a strategy to manage exposure to market risks associated with interest rate fluctuations. On December 24, 2013, the Company entered into a floating-to-fixed interest rate swap agreement (the 2013 Swap) for $100.0 million related to a portion of the Company’s floating rate indebtedness. The 2013 Swap is effective beginning July 1, 2014 and matures on January 2, 2019. On April 5, 2012, the Company entered into two floating-to-fixed interest rate swap agreements (the 2012 Swaps) for an aggregate notional amount of $100.0 million ($50.0 million for each agreement). The 2012 Swaps were effective beginning July 1, 2013 and mature July 3, 2017. The Company designated the 2013 Swap and the 2012 Swaps, as cash flow hedges. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The interest rate swap agreements are highly correlated to the changes in interest rates to which the Company is exposed. Unrealized gains and losses on these swaps are designated as effective or ineffective. The effective portion of such gains or losses is recorded as a component of accumulated other comprehensive income or loss, while the ineffective portion of such gains or losses will be recorded as a component of interest expense. Future realized gains and losses in connection with each required interest payment will be reclassified from accumulated other comprehensive income or loss to interest expense. The Company does not hold or issue derivative financial instruments for trading purposes.
	The effect of derivative instruments in the condensed consolidated statements of operations and accumulated other comprehensive loss for the three and six months ended December 31, 2013 and 2012 is as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2013			2012			2013			2012
	Gain (loss) recognized in other comprehensive income		$	36		$	(36	)	$	(195	)	$	(626	)
	Loss reclassified to earnings from accumulated other comprehensive loss		$	341		$	—		$	674		$	—
	Subsequent to December 31, 2013, the Company entered into two additional interest rate swap agreements. See Note 11.
	The aggregate maturities of long-term debt at December 31, 2013 are as follows (in thousands):
	Twelve months ending December 31,
	2014		$	41,562
	2015			41,563
	2016			41,563
	2017			83,125
	2018			1,253,437
	Principal amount of long-term debt			1,461,250
	Less unamortized discount			(4,653	)
	Less unamortized debt issuance costs			(6,029	)
	Total long-term debt		$	1,450,568

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Dec. 31, 2013
Commitments And Contingencies [Abstract]	'
Commitments and Contingencies	'
	5	Commitments and Contingencies
	The Company is involved in various lawsuits, claims, and administrative proceedings arising in the normal course of business. Management is of the opinion that any liability or loss associated with such matters, either individually or in the aggregate, will not have a material adverse effect on the Company’s operations and liquidity.
	Government Contracting
	Payments to the Company on cost-plus-fee and time-and-materials contracts are subject to adjustment upon audit by the Defense Contract Audit Agency (DCAA). The DCAA is currently in the process of auditing the Company’s incurred cost submissions for the years ended June 30, 2007 and 2008. The DCAA has completed its audits of the Company’s incurred cost submissions for the year ended June 30, 2006, and the Company is awaiting the Defense Contract Management Agency’s decisions regarding those incurred cost submissions. In the opinion of management, audit adjustments that may result from audits not yet completed or started are not expected to have a material effect on the Company’s financial position, results of operations, or cash flows as the Company has accrued its best estimate of potential disallowances. Additionally, the DCAA continually reviews the cost accounting and other practices of government contractors, including the Company. In the course of those reviews, cost accounting and other issues are identified, discussed and settled.
	On March 26, 2012, the Company received a subpoena from the Defense Criminal Investigative Service seeking documents related to one of the Company’s contracts for the period of January 1, 2007 through March 26, 2012. The Company is providing documents responsive to the subpoena and cooperating fully with the government’s investigation. The Company has accrued its current best estimate of the potential outcome within its estimated range of zero to $1.8 million.
	German Value-Added Taxes
	The Company is under audit by the German tax authorities for issues related to value-added tax returns. At this time, the Company has not been assessed any deficiency and, based on sound factual and legal precedent, believes it is in compliance with the applicable value-added tax regulations. The Company has not accrued any liability for this matter because an unfavorable outcome is not considered probable. The Company estimates the range of reasonably possible losses to be between $1.5 million and $3.5 million.
	Virginia Sales and Use Tax Audit
	The Company is under audit for sales and use tax related issues by the Commonwealth of Virginia. While no assessment has been issued, the Company has accrued its current best estimate of the potential outcome within its estimated range of $0.9 million to $3.7 million.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	6	Stock-Based Compensation
	Stock-based compensation expense recognized, together with the income tax benefits recognized, is as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2013			2012			2013		2012
	Stock-based compensation included in indirect costs and selling expenses:
	Restricted stock and restricted stock unit (RSU) expense		$	3,301		$	3,327		$	5,744	$	5,481
	Non-qualified stock option and stock settled stock appreciation right (SSAR) expense			—			174			41		420
	Total stock-based compensation expense		$	3,301		$	3,501		$	5,785	$	5,901
	Income tax benefit recognized for stock-based compensation expense		$	1,278		$	1,302		$	2,225	$	2,216
	Under the terms of its 2006 Stock Incentive Plan (the 2006 Plan), the Company may issue, among others, non-qualified stock options, restricted stock, RSUs, SSARs, and performance awards, collectively referred to herein as equity instruments. During the periods presented all equity instrument grants were made in the form of RSUs. Other than performance-based RSUs which contain a market-based element, the fair value of RSU grants was determined based on the closing price of a share of the Company’s common stock on the date of grant. The fair value of RSUs with market-based vesting features was also measured on the grant date, but was done so using a binomial lattice model.
	Annual grants under the 2006 Plan are generally made to the Company’s key employees during the first quarter of the Company’s fiscal year and to members of the Company’s Board of Directors during the second quarter of the Company’s fiscal year. With the approval of its Chief Executive Officer, the Company also issues equity instruments to strategic new hires and to employees who have demonstrated superior performance. In September 2013, the Company made its annual grant to its key employees consisting of 202,170 Performance Restricted Stock Units (PRSUs). The final number of such performance-based RSUs which will be considered earned by the participants and eventually vest is based on the achievement of a specified Net After Tax Profit (NATP) for the year ending June 30, 2014 and on the average share price of Company stock for the 90 day period ending September 13, 2014 as compared to the average share price for the 90 day period ended September 13, 2013. No PRSUs will be earned if the specified NATP for the fiscal year ending June 30, 2014 is not met. If NATP for the year ending June 30, 2014 exceeds the specified NATP and the average share price of the Company’s stock for the 90 day period ending September 13, 2014 exceeds the average share price of the Company’s stock for the 90 day period ended September 13, 2013 by 100 percent or more then an additional 202,170 RSUs could be earned by participants. This is the maximum number of additional RSUs that can be earned related to the September 2013 annual grant. In addition to the performance and market conditions, there is a service vesting condition which stipulates that 50 percent of the earned award will vest on September 1, 2016 and 50 percent of the earned award will vest on September 1, 2017, in both cases dependent upon continuing service by the grantee as an employee of the Company, unless the grantee is eligible for earlier vesting upon retirement, as defined.
	The total number of shares authorized by shareholders for grants under the 2006 Plan and its predecessor plan is 12,450,000 as of December 31, 2013. The aggregate number of grants that may be made may exceed this approved amount as forfeited SSARs, stock options, restricted stock and RSUs, and vested but unexercised SSARs and stock options that expire, become available for future grants. As of December 31, 2013, cumulative grants of 13,146,544 equity instruments underlying the shares authorized have been awarded, and 4,063,581 of these instruments have been forfeited.
	Activity related to SSARs/non-qualified stock options and RSUs during the six months ended December 31, 2013 is as follows:
			SSARs/			RSUs
			Non-qualified
			Stock Options
	Outstanding, June 30, 2013			275,550			1,042,746
	Granted			—			234,858
	Exercised/Issued			(129,430	)		(300,488	)
	Forfeited/Lapsed			(3,230	)		(27,130	)
	Outstanding, December 31, 2013			142,890			949,986
	Weighted average grant date fair value for RSUs					$	72.09
	As of December 31, 2013, there was $34.2 million of total unrecognized compensation cost related to RSUs scheduled to be recognized over a weighted-average period of 3.4 years.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	7	Earnings Per Share
	ASC 260, Earnings Per Share (ASC 260), requires dual presentation of basic and diluted earnings per share on the face of the income statement. Basic earnings per share exclude dilution and are computed by dividing income by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflect potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock but not securities that are anti-dilutive, including stock options and SSARs with an exercise price greater than the average market price of the Company’s common stock. Using the treasury stock method, diluted earnings per share include the incremental effect of SSARs, stock options, restricted shares, and those RSUs that are no longer subject to a market or performance condition. For both the three and six months ended December 31, 2012, there were 0.3 million weighted-average common stock equivalents excluded from the diluted per share computation due to their anti-dilutive effects. There were no anti-dilutive common stock equivalents for the three or six months ended December 31, 2013. The PRSUs granted in September 2013 are excluded from the calculation of diluted earnings per share as the underlying shares are considered to be contingently issuable shares. These shares will be included in the calculation of diluted earnings per share beginning in the first reporting period in which the performance metric is achieved. The shares underlying the Notes were included in the computation of diluted earnings per share for the three and six months ended December 31, 2013 and the six months ended December 31, 2012 because the average share price was above the conversion price during those periods. The shares underlying the Notes were not included in the computation of diluted earnings per share for the three months ended December 31, 2012 because the average share price was below the conversion price during that three month period. The Warrants were included in the computation of diluted earnings per share during the three and six months ended December 31, 2013 because the Warrants’ exercise price of $68.31 was lower than the average market price of a share of Company common stock during those periods. The Warrants were excluded from the computation of earnings per share during the three and six months ended December 31, 2012 because the Warrants’ exercise price was above the average market price during those periods. The chart below shows the calculation of basic and diluted earnings per share (in thousands, except per share amounts):
			Three Months Ended				Six Months Ended
			December 31,				December 31,
			2013		2012		2013		2012
	Net income attributable to CACI		$	34,962	$	39,676	$	67,954	$	75,384
	Weighted average number of basic shares outstanding during the period			23,433		22,852		23,374		22,942
	Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method			403		685		464		810
	Dilutive effect of the Notes and Warrants			1,461		—		1,228		6
	Weighted average number of diluted shares outstanding during the period			25,297		23,537		25,066		23,758
	Basic earnings per share		$	1.49	$	1.74	$	2.91	$	3.29
	Diluted earnings per share		$	1.38	$	1.69	$	2.71	$	3.17

Income_Taxes

Income Taxes	6 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	8	Income Taxes
	The Company is subject to income taxes in the U.S. and various state and foreign jurisdictions. Tax statutes and regulations within each jurisdiction are subject to interpretation and require the application of significant judgment. The Company is currently under examination by three state jurisdictions and one foreign jurisdiction for years ended June 30, 2004 through June 30, 2012. The Company does not expect the resolution of these examinations to have a material impact on its results of operations, financial condition or cash flows.
	The Company’s total liability for unrecognized tax benefits as of December 31, 2013 and June 30, 2013 was $9.2 million and $8.2 million, respectively. Of the $9.2 million unrecognized tax benefit at December 31, 2013, $2.6 million, if recognized, would impact the Company’s effective tax rate.
	As of June 30, 2013, the Company corrected the classification of $4.2 million of deferred tax liabilities by reclassifying this amount from non-current deferred tax liabilities to a reduction of current deferred tax assets and concluded that this reclassification was not material.

Business_Segment_Information

Business Segment Information	6 Months Ended
	Dec. 31, 2013
Business Segment Information [Abstract]	'
Business Segment Information	'
	9	Business Segment Information
	The Company reports operating results and financial data in two segments: domestic operations and international operations. Domestic operations provide information solutions and services to its customers. Its customers are primarily U.S. federal government agencies. Other customers of the Company’s domestic operations include state and local governments and commercial enterprises. The Company does not measure revenue or profit by its major market areas or service offerings, either for internal management or external financial reporting purposes, as it would be impractical to do so. The Company places employees in locations around the world in support of its clients. International operations offer services to both commercial and non-U.S. government customers primarily within the Company’s business systems and enterprise IT markets. The Company evaluates the performance of its operating segments based on net income attributable to CACI. Summarized financial information concerning the Company’s reportable segments is as follows (in thousands):
			Domestic		International		Total
	Three Months Ended December 31, 2013
	Revenue from external customers		$	857,457	$	36,729	$	894,186
	Net income attributable to CACI			32,234		2,728		34,962
	Three Months Ended December 31, 2012
	Revenue from external customers		$	897,346	$	34,281	$	931,627
	Net income attributable to CACI			37,010		2,666		39,676
	Six Months Ended December 31, 2013
	Revenue from external customers		$	1,688,332	$	70,119	$	1,758,451
	Net income attributable to CACI			62,914		5,040		67,954
	Six Months Ended December 31, 2012
	Revenue from external customers		$	1,795,630	$	67,233	$	1,862,863
	Net income attributable to CACI			70,417		4,967		75,384

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	6 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	10	Fair Value of Financial Instruments
	ASC 820, Fair Value Measurements and Disclosures, defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in an orderly transaction. The market in which the reporting entity would sell the asset or transfer the liability with the greatest volume and level of activity for the asset or liability is known as the principal market. When no principal market exists, the most advantageous market is used. This is the market in which the reporting entity would sell the asset or transfer the liability with the price that maximizes the amount that would be received or minimizes the amount that would be paid. Fair value is based on assumptions market participants would make in pricing the asset or liability. Generally, fair value is based on observable quoted market prices or derived from observable market data when such market prices or data are available. When such prices or inputs are not available, the reporting entity should use valuation models.
	The Company’s financial assets and liabilities recorded at fair value on a recurring basis are categorized based on the priority of the inputs used to measure fair value. The inputs used in measuring fair value are categorized into three levels, as follows:
		•		Level 1 Inputs – unadjusted quoted prices in active markets for identical assets or liabilities.
		•		Level 2 Inputs – unadjusted quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, inputs other than quoted prices that are observable, and inputs derived from or corroborated by observable market data.
		•		Level 3 Inputs – amounts derived from valuation models in which unobservable inputs reflect the reporting entity’s own assumptions about the assumptions of market participants that would be used in pricing the asset or liability.
	The Company’s financial instruments measured at fair value included non-corporate owned life insurance (COLI) money market investments and mutual funds held in the Company’s supplemental retirement savings plan (the Supplemental Savings Plan), contingent consideration in connection with past acquisitions and interest rate swap agreements. Contingent consideration recorded at December 31, 2013 and June 30, 2013 related to the February 1, 2012 U.K. acquisition of Tomorrow Communications, Ltd (TCL). The following table summarizes the financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 and June 30, 2013, and the level they fall within the fair value hierarchy (in thousands):
	Description of Financial Instrument		Financial Statement		Fair Value	December 31,		June 30,
			Classification		Hierarchy	2013		2013
						Fair Value
	Non-COLI assets held in connection with the Supplemental Savings Plan		Long-term asset		Level 1	$	—	$	830
	Contingent Consideration		Current liability		Level 3	$	3,288	$	2,977
	Interest rate swap agreements		Other long-term liabilities		Level 2	$	2,087	$	1,765
	Changes in the fair value of the assets held in connection with the Supplemental Savings Plan are recorded in indirect costs and selling expenses.
	Contingent consideration at December 31, 2013 and June 30, 2013 related to the requirement that the Company pay contingent consideration in the event TCL achieved certain specified earnings results during the one year period subsequent to acquisition. The Company determined the fair value of contingent consideration as of the acquisition date using a valuation model which included the evaluation of all possible outcomes and the application of an appropriate discount rate. At the end of each reporting period, the fair value of the contingent consideration is remeasured and any changes are recorded in indirect costs and selling expenses. During the three and six months ended December 31, 2013 and 2012, this remeasurement did not result in a significant change to the liability recorded. The maximum contingent consideration associated with the TCL acquisition is approximately $6.0 million. During the year ended June 30, 2013, the Company determined that the maximum contingent consideration possible had been earned. One-half of this amount was paid to the former shareholders of TCL in February 2013. The remaining one-half is scheduled to be paid in February 2014.
	Changes in the fair value of the interest rate swap agreements are recorded as a component of accumulated other comprehensive income or loss.

Subsequent_Events

Subsequent Events	6 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	11	Subsequent Events
	During January 2014, the Company entered into two floating-to-fixed interest rate swap agreements for an aggregate notional amount of $200.0 million which hedge a portion of the Company’s floating rate indebtedness. The agreements are effective beginning July 1, 2014. $100.0 million matures on each of July 2, 2018 and January 2, 2019. The Company designated the interest rate swap agreements as cash flow hedges. The Company may choose to enter into additional interest rate swap agreements in the future.

Acquisition_Tables

Acquisition (Tables)	6 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Schedule of assets acquired and liabilities assumed	'
	Cash	$	10,166
	Accounts receivable		80,615
	Prepaid expenses and other current assets		17,551
	Property and equipment		8,051
	Customer contracts and customer relationships		164,300
	Goodwill		702,747
	Other assets		598
	Accounts payable		(9,047	)
	Accrued expenses and other current liabilities		(63,417	)
	Long-term deferred tax liability		(64,275	)
	Total estimated consideration	$	847,289
Schedule of unaudited pro forma results of operations	'
		Six Months Ended
		December 31,
		2013			2012
	Revenue	$	1,936,283		$	2,072,832
	Net income		82,224			73,635
	Basic earnings per share		3.52			3.21
	Diluted earnings per share		3.28			3.1

Intangible_Assets_Tables

Intangible Assets (Tables)	6 Months Ended
	Dec. 31, 2013
Intangible Assets [Abstract]	'
Schedule of intangible assets	'
		December 31,			June 30,
		2013			2013
	Customer contracts and related customer relationships	$	516,541		$	351,349
	Acquired technologies		27,177			27,177
	Covenants not to compete		3,449			3,401
	Other		1,593			1,639
	Intangible assets		548,760			383,566
	Less accumulated amortization		(296,352	)		(279,378	)
	Total intangible assets, net	$	252,408		$	104,188
Schedule of expected amortization expense	'
	Fiscal year ending June 30,	Amount
	2014 (six months)	$	22,142
	2015		39,343
	2016		32,671
	2017		29,361
	2018		25,312
	Thereafter		103,579
	Total intangible assets, net	$	252,408

Longterm_Debt_Tables

Long-term Debt (Tables)	6 Months Ended
	Dec. 31, 2013
Long-Term Debt [Abstract]	'
Schedule of long-term debt	'
		December 31,			June 30,
		2013			2013
	Convertible notes payable	$	300,000		$	300,000
	Bank credit facility – Term Loan		831,250			131,250
	Bank credit facility – Revolving Facility		330,000			180,000
	Principal amount of long-term debt		1,461,250			611,250
	Less unamortized discount		(4,653	)		(11,421	)
	Less unamortized debt issuance costs		(6,029	)		(3,522	)
	Total long-term debt		1,450,568			596,307
	Less current portion		(41,562	)		(295,517	)
	Long-term debt, net of current portion	$	1,409,006		$	300,790
Schedule of components of interest expense	'
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Coupon interest	$	1,594		$	1,594		$	3,188		$	3,188
	Non-cash amortization of discount		3,409			3,185			6,769			6,325
	Amortization of issuance costs		205			205			410			410
	Total	$	5,208		$	4,984		$	10,367		$	9,923
Schedule of effect of derivative instruments in the condensed consolidated statements of operations and accumulated other comprehensive loss	'
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013			2012
	Gain (loss) recognized in other comprehensive income	$	36		$	(36	)	$	(195	)	$	(626	)
	Loss reclassified to earnings from accumulated other comprehensive loss	$	341		$	—		$	674		$	—
Schedule of aggregate maturities of long-term debt	'
	Twelve months ending December 31,
	2014	$	41,562
	2015		41,563
	2016		41,563
	2017		83,125
	2018		1,253,437
	Principal amount of long-term debt		1,461,250
	Less unamortized discount		(4,653	)
	Less unamortized debt issuance costs		(6,029	)
	Total long-term debt	$	1,450,568

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of stock-based compensation expense recognized	'
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2013			2012			2013		2012
	Stock-based compensation included in indirect costs and selling expenses:
	Restricted stock and restricted stock unit (RSU) expense	$	3,301		$	3,327		$	5,744	$	5,481
	Non-qualified stock option and stock settled stock appreciation right (SSAR) expense		—			174			41		420
	Total stock-based compensation expense	$	3,301		$	3,501		$	5,785	$	5,901
	Income tax benefit recognized for stock-based compensation expense	$	1,278		$	1,302		$	2,225	$	2,216
Schedule of activity related to SSARs/non-qualified stock options and RSUs	'
		SSARs/			RSUs
		Non-qualified
		Stock Options
	Outstanding, June 30, 2013		275,550			1,042,746
	Granted		—			234,858
	Exercised/Issued		(129,430	)		(300,488	)
	Forfeited/Lapsed		(3,230	)		(27,130	)
	Outstanding, December 31, 2013		142,890			949,986
	Weighted average grant date fair value for RSUs				$	72.09

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of calculation of basic and diluted earnings per share	'
		Three Months Ended				Six Months Ended
		December 31,				December 31,
		2013		2012		2013		2012
	Net income attributable to CACI	$	34,962	$	39,676	$	67,954	$	75,384
	Weighted average number of basic shares outstanding during the period		23,433		22,852		23,374		22,942
	Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method		403		685		464		810
	Dilutive effect of the Notes and Warrants		1,461		—		1,228		6
	Weighted average number of diluted shares outstanding during the period		25,297		23,537		25,066		23,758
	Basic earnings per share	$	1.49	$	1.74	$	2.91	$	3.29
	Diluted earnings per share	$	1.38	$	1.69	$	2.71	$	3.17

Business_Segment_Information_T

Business Segment Information (Tables)	6 Months Ended
	Dec. 31, 2013
Business Segment Information [Abstract]	'
Schedule of summarized financial information concerning the company's reportable segments	'
		Domestic		International		Total
	Three Months Ended December 31, 2013
	Revenue from external customers	$	857,457	$	36,729	$	894,186
	Net income attributable to CACI		32,234		2,728		34,962
	Three Months Ended December 31, 2012
	Revenue from external customers	$	897,346	$	34,281	$	931,627
	Net income attributable to CACI		37,010		2,666		39,676
	Six Months Ended December 31, 2013
	Revenue from external customers	$	1,688,332	$	70,119	$	1,758,451
	Net income attributable to CACI		62,914		5,040		67,954
	Six Months Ended December 31, 2012
	Revenue from external customers	$	1,795,630	$	67,233	$	1,862,863
	Net income attributable to CACI		70,417		4,967		75,384

Recovered_Sheet1

Fair Value Of Financial Instruments (Tables)	6 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of financial assets and liabilities measured at fair value on a recurring basis	'
	Description of Financial Instrument	Financial Statement	Fair Value	December 31,		June 30,
		Classification	Hierarchy	2013		2013
				Fair Value
	Non-COLI assets held in connection with the Supplemental Savings Plan	Long-term asset	Level 1	$	—	$	830
	Contingent Consideration	Current liability	Level 3	$	3,288	$	2,977
	Interest rate swap agreements	Other long-term liabilities	Level 2	$	2,087	$	1,765

Basis_Of_Presentation_Detail_T

Basis Of Presentation (Detail Textuals) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Basis Of Presentation [Abstract]	'
Variable interest entity, minimum ownership percentage	50.00%
Convertible notes payable	$300
Convertible senior subordinated notes rate	2.13%
Convertible senior subordinated notes, issuance date	16-May-07
Convertible senior subordinated notes, maturity date	16-May-14

Acquisition_Asset_aquired_and_

Acquisition - Asset aquired and liability assumed (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013	Nov. 15, 2013
In Thousands, unless otherwise specified			Six3 Systems Holdings II Inc
Business Acquisition [Line Items]	'	'	'
Cash	'	'	$10,166
Accounts receivable	'	'	80,615
Prepaid expenses and other current assets	'	'	17,551
Property and equipment	'	'	8,051
Customer contracts and customer relationships	'	'	164,300
Goodwill	2,186,221	1,476,965	702,747
Other assets	'	'	598
Accounts payable	'	'	-9,047
Accrued expenses and other current liabilities	'	'	-63,417
Long-term deferred tax liability	'	'	-64,275
Total estimated consideration	'	'	$847,289

Acquisition_Unaudited_proforma

Acquisition - Unaudited proforma results of operations assume the Six3 Systems acquisition (Details 1) (Six3 Systems Holdings II Inc, USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Six3 Systems Holdings II Inc	'	'
Business Acquisition [Line Items]	'	'
Revenue	$1,936,283	$2,072,832
Net income	$82,224	$73,635
Basic earnings per share (in dollars per share)	$3.52	$3.21
Diluted earnings per share (in dollars per share)	$3.28	$3.10

Acquisition_Detail_Textuals

Acquisition (Detail Textuals) (Six3 Systems Holdings II Inc, USD $)	0 Months Ended
In Millions, unless otherwise specified	Nov. 15, 2013
Term Loan	'
Business Acquisition [Line Items]	'
Increase in credit facility	$700
Revolving Credit Facility	'
Business Acquisition [Line Items]	'
Increase in credit facility	$100

Acquisition_Detail_Textuals_1

Acquisition (Detail Textuals 1) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Nov. 15, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Nov. 15, 2013	Dec. 31, 2013
					Six3 Systems Holdings II Inc	Six3 Systems Holdings II Inc	Six3 Systems Holdings II Inc	Six3 Systems Holdings II Inc	Six3 Systems Holdings II Inc	Six3 Systems Holdings II Inc
								Retention Agreements With Acquired Entity Executive	Customer Contracts And Customer Relationships	Customer Contracts And Customer Relationships
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'
Initial purchase consideration	'	'	'	'	$820,000,000	'	'	'	'	'
Estimated cash and net working capital adjustment	'	'	'	'	25,800,000	'	'	'	'	'
Escrow account	'	'	'	'	40,000,000	'	'	'	'	'
Estimated consideration allocated to assets acquired and liabilities assumed	'	'	'	'	847,289,000	'	'	'	'	'
Net working capital adjustment	'	'	'	'	1,400,000	'	'	'	'	'
Value attributed to goodwill, customer contracts and customer relationships deductible for income tax purposes	'	'	'	'	55,100,000	'	'	'	'	'
Amortization period	'	'	'	'	'	'	'	'	'14 years	'
Revenue	894,186,000	931,627,000	1,758,451,000	1,862,863,000	'	48,900,000	'	'	'	'
Net income	34,962,000	39,676,000	67,954,000	75,384,000	'	100,000	'	'	'	'
Amortization of customer contracts and customer relationships	'	'	'	'	'	'	'	'	'	2,800,000
Retention bonuses	'	'	'	'	'	'	'	800,000	'	'
Acquisition-related expenses	'	'	'	'	'	'	$9,700,000	'	'	'

Intangible_Assets_Summary_of_i

Intangible Assets - Summary of intangible Assets (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Intangible Assets [Abstract]	'	'
Customer contracts and related customer relationships	$516,541	$351,349
Acquired technologies	27,177	27,177
Covenants not to compete	3,449	3,401
Other	1,593	1,639
Intangible assets	548,760	383,566
Less accumulated amortization	-296,352	-279,378
Total intangible assets, net	$252,408	$104,188

Intangible_Assets_Summary_of_e

Intangible Assets - Summary of expected amortization expense (Details 1) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Intangible Assets [Abstract]	'	'
2014 (six months)	$22,142	'
2015	39,343	'
2016	32,671	'
2017	29,361	'
2018	25,312	'
Thereafter	103,579	'
Total intangible assets, net	$252,408	$104,188

Intangible_Assets_Detail_Textu

Intangible Assets (Detail Textuals)	6 Months Ended
	Dec. 31, 2013
Minimum	'
Finite-Lived Intangible Assets [Line Items]	'
Intangible asset amortization period	'1 year
Maximum	'
Finite-Lived Intangible Assets [Line Items]	'
Intangible asset amortization period	'15 years
Customer contracts and related customer relationships	'
Finite-Lived Intangible Assets [Line Items]	'
Weighted-average amortization period	'11 years 6 months
Weighted-average remaining amortization period	'11 years 9 months 18 days
Acquired technologies	'
Finite-Lived Intangible Assets [Line Items]	'
Weighted-average amortization period	'6 years 8 months 12 days
Weighted-average remaining amortization period	'5 years

Longterm_Debt_Summary_of_longt

Long-term Debt - Summary of long-term debt (Details) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Principal amount of long-term debt	$1,461,250	$611,250
Less unamortized discount	-4,653	-11,421
Less unamortized debt issuance costs	-6,029	-3,522
Total long-term debt	1,450,568	596,307
Less current portion	-41,562	-295,517
Long-term debt, net of current portion	1,409,006	300,790
Convertible notes payable	'	'
Debt Instrument [Line Items]	'	'
Principal amount of long-term debt	300,000	300,000
Less unamortized debt issuance costs	-5,800	'
Bank credit facility - Term Loan	'	'
Debt Instrument [Line Items]	'	'
Principal amount of long-term debt	831,250	131,250
Bank credit facility - Revolving Facility	'	'
Debt Instrument [Line Items]	'	'
Principal amount of long-term debt	$330,000	$180,000

Longterm_Debt_Components_of_in

Long-term Debt - Components of interest expense (Details 1) (Convertible Notes Payable, USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Convertible Notes Payable	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Coupon interest	$1,594	$1,594	$3,188	$3,188
Non-cash amortization of discount	3,409	3,185	6,769	6,325
Amortization of issuance costs	205	205	410	410
Total	$5,208	$4,984	$10,367	$9,923

Longterm_Debt_Effect_of_deriva

Long-term Debt - Effect of derivative instruments (Details 2) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Long-Term Debt [Abstract]	'	'	'	'
Gain (loss) recognized in other comprehensive income	$36	($36)	($195)	($626)
Loss reclassified to earnings from accumulated other comprehensive loss	$341	'	$674	'

Longterm_Debt_Aggregate_maturi

Long-term Debt - Aggregate maturities of long-term debt (Details 3) (USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Long-Term Debt [Abstract]	'	'
2014	$41,562	'
2015	41,563	'
2016	41,563	'
2017	83,125	'
2018	1,253,437	'
Principal amount of long-term debt	1,461,250	611,250
Less unamortized discount	-4,653	-11,421
Less unamortized debt issuance costs	-6,029	-3,522
Total long-term debt	$1,450,568	$596,307

Longterm_Debt_Detail_Textuals

Long-term Debt (Detail Textuals) (USD $)

6 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Nov. 14, 2013

Nov. 15, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Nov. 14, 2013

Nov. 15, 2013

Dec. 31, 2013

Dec. 31, 2013

Indirect costs and selling expenses

Bank Credit Facility

Bank Credit Facility

Bank Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Same-Day Swing Line Loan Revolving Credit Sub Facility

Stand-By Letters Of Credit Revolving Credit Sub Facility

Term Loan

Term Loan

Term Loan

Term Loan

Term Loan

Long-term Debt

Other long-term assets

Six3 Systems Holdings II Inc

Six3 Systems Holdings II Inc

Principal Payment Through 31 December, 2016

Principal Payment Thereafter 31 December, 2016

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility maximum borrowing capacity

'

'

'

$1,700,000,000

'

'

$850,000,000

$750,000,000

'

$50,000,000

$25,000,000

$831,300,000

$150,000,000

'

'

'

Credit facility borrowing capacity, description

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage,calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals.

Increase in credit facility

'

'

'

'

'

'

'

'

100,000,000

'

'

'

'

700,000,000

'

'

Loss on extinguishment

-4,116,000

'

4,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan maturity date

'

'

'

15-Nov-18

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, amount outstanding

'

'

'

'

'

'

330,000,000

'

'

'

500,000

'

'

'

'

'

Term loan period

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

'

Term loan principal payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,400,000

20,800,000

Term loan frequency of payment

'

'

'

'Quarterly

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding borrowings interest rate

'

'

'

2.28%

'

'

'

'

'

'

'

'

'

'

'

'

Debt issuance cost capitalized

'

'

'

18,100,000

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized debt issuance expense

$6,029,000

$3,522,000

'

'

$5,800,000

$7,000,000

'

'

'

'

'

'

'

'

'

'

Longterm_Debt_Detail_Textuals_

Long-term Debt (Detail Textuals 1) (USD $)

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

Share data in Millions, except Per Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Apr. 05, 2012

Apr. 05, 2012

Apr. 05, 2012

Dec. 24, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

16-May-07

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Cash Flow Hedging

Cash Flow Hedging

Cash Flow Hedging

Cash Flow Hedging

Minimum

Maximum

Convertible Notes Payable

Convertible Notes Payable

Convertible Notes Payable

Convertible Notes Payable

Convertible Notes Payable

Convertible Notes Payable

Interest Rate Swap Agreements

Interest Rate Swap Agreements

Interest Rate Swap Agreements

Interest Rate Swap Agreements

Warrants

Warrants

Day

Call Options

Non-Cash Interest Expense

Warrants

Minimum

Agreement

Interest rate swap agreement one

Interest rate swap agreement two

Interest rate swap agreement three

Call Options

Call Options

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion rate of notes into shares

'

'

'

'

'

'

'

'

'

18.2989

'

'

'

'

'

Face value of convertible notes

'

'

'

'

'

'

'

'

'

$1,000

'

'

'

'

'

Initial conversion price per share

'

'

'

'

'

'

'

$54.65

$68.31

$54.65

'

'

'

'

'

Debt conversion circumstances

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1) if the last reported sale price of CACI stock is greater than or equal to 130 percent of the applicable conversion price for at least 20 trading days in the period of 30 consecutive trading days ending on the last trading day of the preceding fiscal quarter; 2) during the five consecutive business day period immediately after any ten consecutive trading day period (the note measurement period) in which the average of the trading price per $1,000 principal amount of convertible note was equal to or less than 97 percent of the average product of the closing price of a share of the Company’s common stock and the conversion rate of each date during the note measurement period; 3) upon the occurrence of certain corporate events constituting a fundamental change, as defined in the indenture governing the Notes; or 4) during the last three-month period prior to maturity. CACI is required to satisfy 100 percent of the principal amount of these notes solely in cash, with any amounts above the principal amount to be satisfied in common stock.

Percent of sale price of stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

130.00%

Threshold trading days of note

'

'

'

'

'

'

'

'

'

20

'

'

'

'

'

Measurement period for shares and conversion price

'

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

Threshold of share and conversion price

'

'

'

'

'

'

'

'

'

'5 days

'

'

'

'

'

Measurement period for shares and notes price

'

'

'

'

'

'

'

'

'

'10 days

'

'

'

'

'

Note percent of average product closing price

'

'

'

'

'

'

'

'

'

97.00%

'

'

'

'

'

Percent of notes to be paid in cash

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

Effective interest rate for the notes

'

'

'

'

'

'

'

'

'

6.90%

'

'

'

'

'

Proceed from notes payable

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

Fair value of the liability component of notes

'

'

'

'

'

'

'

'

'

'

221,900,000

'

'

'

'

Fair value of equity component note

'

'

'

'

'

'

'

'

'

78,100,000

'

'

'

'

'

Debt discount amortization period

'

'

'

'

'

'

'

'

'

'7 years

'

'

'

'

'

Unamortized debt discount

4,653,000

'

11,421,000

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of the notes

405,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total debt issuance costs

13,222,000

612,000

'

'

'

'

'

'

'

7,800,000

'

'

'

'

'

Unamortized debt issuance expense

6,029,000

'

3,522,000

'

'

'

'

'

'

5,800,000

'

'

'

'

'

Debt issuance costs attributable to conversion option

'

'

'

'

'

'

'

'

'

2,000,000

'

'

'

'

'

Proceeds from sale of notes receivable

'

'

'

'

'

'

'

'

'

45,500,000

'

'

'

'

'

Repurchases of common stock, shares

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

Purchase of call option

'

'

'

'

'

'

'

'

'

'

'

84,400,000

'

'

'

Purchase of common stock

'

'

'

'

'

'

'

'

'

'

'

5.5

'

'

'

Income tax benefit on discount on issue of notes

'

'

'

'

'

'

'

'

'

32,800,000

'

'

'

'

'

Deferred tax liability

'

'

'

'

'

'

'

'

'

'

'

'

30,700,000

'

'

Common shares issuable under the sale of warrants

'

'

'

'

'

'

'

'

'

5.5

'

'

'

'

'

Warrant's exercise price

68.31

68.31

'

'

'

'

'

'

'

'

'

'

'

68.31

'

Proceeds from sales of warrant

'

'

'

'

'

'

'

'

'

'

'

'

'

56,500,000

'

Swap agreements

'

'

'

$100,000,000

$50,000,000

$50,000,000

$100,000,000

'

'

'

'

'

'

'

'

Number of floating to fixed interest rate swap agreements

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

Commitments_And_Contingencies_

Commitments And Contingencies (Detail Textuals) (USD $)	1 Months Ended	6 Months Ended
	Mar. 26, 2012	Dec. 31, 2013
	Contract
Loss Contingencies [Line Items]	'	'
Number of company contracts subpoenaed	1	'
Accrued estimates of the possible losses, low	'	$0
Accrued estimates of the possible losses, high	'	1,800,000
Potential outcome minimum	'	1,500,000
Potential outcome maximum	'	3,500,000
Minimum	'	'
Loss Contingencies [Line Items]	'	'
Income tax examination, range of possible losses	'	900,000
Maximum	'	'
Loss Contingencies [Line Items]	'	'
Income tax examination, range of possible losses	'	$3,700,000

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of stock-based compensation expense recognized (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation included in indirect costs and selling expenses:	'	'	'	'
Restricted stock and restricted stock unit (RSU) expense.	$3,301	$3,327	$5,744	$5,481
Non-qualified stock option and stock settled stock appreciation right (SSAR) expense	'	174	41	420
Total stock-based compensation expense	3,301	3,501	5,785	5,901
Income tax benefit recognized for stock-based compensation expense	$1,278	$1,302	$2,225	$2,216

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of activity related to SSARs/non-qualified stock options and RSUs/restricted shares issued (Details 1) (USD $)	6 Months Ended
	Dec. 31, 2013
SSARs/ Non-qualified Stock Options	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, June 30, 2013	275,550
Granted	'
Exercised/Issued	-129,430
Forfeited/Lapsed	-3,230
Outstanding, December 31, 2013	142,890
RSUs	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, June 30, 2013	1,042,746
Granted	234,858
Exercised/Issued	-300,488
Forfeited/Lapsed	-27,130
Outstanding, December 31, 2013	949,986
Weighted average grant date fair value for RSUs	72.09

StockBased_Compensation_Detail

Stock-Based Compensation (Detail Textuals) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013
2006 Stock Incentive Plan | Restricted Shares And Restricted Stock Units	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation cost	$34.20
Weighted-average period to recognize unrecognized compensation cost (in years)	'3 years 4 months 24 days
2006 Stock Incentive Plan | PRSUs	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Period to establish average share price for performance measurement	'90 days
2006 Stock Incentive Plan | PRSUs | September 2013	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
PRSUs granted	202,170
2006 Stock Incentive Plan | RSUs	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Description of issuance of awards condition	'
	If NATP for the year ending June 30, 2014 exceeds the specified NATP and the average share price of the Company’s stock for the 90 day period ending September 13, 2014 exceeds the average share price of the Company’s stock for the 90 day period ended September 13, 2013 by 100 percent or more then an additional 202,170 RSUs could be earned by participants.
Number of additional awards to be issued pursuant to condition	202,170
Description of vesting of awards	'
	In addition to the performance and market conditions, there is a service vesting condition which stipulates that 50 percent of the earned award will vest on September 1, 2016 and 50 percent of the earned award will vest on September 1, 2017
2006 Stock Incentive Plan | RSUs | September 2016	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting percentage of awards	50.00%
2006 Stock Incentive Plan | RSUs | September 2017	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting percentage of awards	50.00%
2006 Plan And Predecessor Plan	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares authorized for grants	12,450,000
Cumulative grants of equity instruments	13,146,544
Number of equity instruments forfeited	4,063,581

Earnings_Per_Share_Computation

Earnings Per Share - Computation of earnings per share and weighted average number of basic and diluted shares (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]	'	'	'	'
Net income attributable to CACI	$34,962	$39,676	$67,954	$75,384
Weighted average number of basic shares outstanding during the period	23,433	22,852	23,374	22,942
Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method	403	685	464	810
Dilutive effect of the Notes and Warrants	1,461	'	1,228	6
Weighted average number of diluted shares outstanding during the period	25,297	23,537	25,066	23,758
Basic earnings per share (in dollars per share)	$1.49	$1.74	$2.91	$3.29
Diluted earnings per share (in dollars per share)	$1.38	$1.69	$2.71	$3.17

Earnings_Per_Share_Detail_Text

Earnings Per Share (Detail Textuals)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2013
Earnings Per Share [Abstract]	'	'	'
Anti-dilutive effect shares	0.3	0.3	'
Warrant's exercise price	68.31	68.31	68.31

Income_Taxes_Detail_Textuals

Income Taxes (Detail Textuals) (USD $)	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2013
In Millions, unless otherwise specified			Foreign Jurisdiction	State Jurisdiction
			Contract	Contract
Operating Loss Carryforwards [Line Items]	'	'	'	'
Number of jurisdictions	'	'	1	3
Unrecognized tax benefits	$9.20	$8.20	'	'
Unrecognized tax benefit that would impact the company's effective tax rate	2.6	'	'	'
Reclassified deferred tax liabilities from non-current to current	'	$4.20	'	'

Business_Segment_Information_D

Business Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Revenue from external customers	$894,186	$931,627	$1,758,451	$1,862,863
Net income attributable to CACI	34,962	39,676	67,954	75,384
Reportable Geographical Components | Domestic	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Revenue from external customers	857,457	897,346	1,688,332	1,795,630
Net income attributable to CACI	32,234	37,010	62,914	70,417
Reportable Geographical Components | International	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Revenue from external customers	36,729	34,281	70,119	67,233
Net income attributable to CACI	$2,728	$2,666	$5,040	$4,967

Business_Segment_Information_D1

Business Segment Information (Detail Textuals) (Reportable Geographical Components)	6 Months Ended
	Dec. 31, 2013
	Segment
Reportable Geographical Components	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'
Number of operating segments	2

Fair_Value_Of_Financial_Instru1

Fair Value Of Financial Instruments (Details) (Fair Value, Measurements, Recurring, USD $)	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Long-Term Asset | Fair Value, Inputs, Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Non-COLI assets held in connection with the Supplemental Savings Plan	'	$830
Current Liability | Fair Value, Inputs, Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Contingent Consideration	3,288	2,977
Other long-term liabilities | Fair Value, Inputs, Level 2 | Interest Rate Swap Agreements	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Aggregate notional amount	$2,087	$1,765

Fair_Value_Of_Financial_Instru2

Fair Value Of Financial Instruments (Detail textuals) (TCL, USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Contingent consideration earned period (in years)	'1 year
Maximum	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Contingent Consideration	6,000
Payment February 2013	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Percentage of contingent consideration paid	50.00%
Payment February 2014	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Percentage of contingent consideration paid	50.00%

Subsequent_Events_Detail_Textu

Subsequent Events (Detail Textuals) (Interest Rate Swap Agreements, Cash Flow Hedging, USD $)	Apr. 05, 2012	Jan. 31, 2014	Jan. 31, 2014	Jan. 31, 2014
In Millions, unless otherwise specified	Agreement	Subsequent event	Subsequent event	Subsequent event
		Agreement	Interest rate swap agreement four	Interest rate swap agreement five
Subsequent Event [Line Items]	'	'	'	'
Number of interest rate swap agreements	2	2	'	'
Aggregate notional amount	$100	$200	$100	$100
Mature date for swap agreement	'	'	2-Jul-18	2-Jan-19