Mantech International (MANT) 10-Q 1 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2013	Oct. 30, 2013	Oct. 30, 2013
		Class A Common Stock [Member]	Class B Common Stock [Member]
Entity Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'Q3	'	'
Trading Symbol	'MANT	'	'
Entity Registrant Name	'MANTECH INTERNATIONAL CORP	'	'
Entity Central Index Key	'0000892537	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	23,976,213	13,192,845

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$258,666	$134,896
Receivables-net	491,275	548,309
Prepaid expenses and other	17,656	27,185
Contractual inventory	0	34,762
Total Current Assets	767,597	745,152
Goodwill	871,294	861,912
Other intangible assets-net	156,320	167,910
Property and equipmentbnet	29,053	28,588
Employee supplemental savings plan assets	30,237	27,352
Other assets	9,891	10,995
TOTAL ASSETS	1,864,392	1,841,909
LIABILITIES	'	'
Accounts payable and accrued expenses	252,712	315,582
Accrued salaries and related expenses	76,783	52,364
Billings in excess of revenue earned	14,966	15,031
Deferred income taxesbcurrent	665	4,266
Total Current Liabilities	345,126	387,243
Long-term debt	200,000	200,000
Deferred income taxesbnon-current	71,494	50,645
Accrued retirement	31,488	29,390
Other long-term liabilities	11,195	9,403
TOTAL LIABILITIES	659,303	676,681
COMMITMENTS AND CONTINGENCIES	'	'
STOCKHOLDERS' EQUITY	'	'
Additional paid-in capital	422,349	417,917
Treasury stock	-9,158	-9,158
Retained earnings	792,301	756,241
Accumulated other comprehensive income (loss)	-157	-145
Unearned employee stock ownership plan shares	-620	0
TOTAL STOCKHOLDERS' EQUITY	1,205,089	1,165,228
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,864,392	1,841,909
Class A Common Stock [Member]	'	'
STOCKHOLDERS' EQUITY	'	'
Common stock	242	241
Class B Common Stock [Member]	'	'
STOCKHOLDERS' EQUITY	'	'
Common stock	$132	$132

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets Parentheticals (USD $)	Sep. 30, 2013	Dec. 31, 2012
Treasury Stock, Shares	244,113	244,113
Class A Common Stock [Member]	'	'
Common Stock, Par Value Per Share	0.01	0.01
Common Stock, Shares Authorized	150,000,000	150,000,000
Common Stock, Shares, Issued	24,220,326	24,093,832
Common Stock, Shares, Outstanding	23,976,213	23,849,719
Class B Common Stock [Member]	'	'
Common Stock, Par Value Per Share	0.01	0.01
Common Stock, Shares Authorized	50,000,000	50,000,000
Common Stock, Shares, Issued	13,192,845	13,192,845
Common Stock, Shares, Outstanding	13,192,845	13,192,845

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues	$567,399,000	$645,028,000	$1,818,536,000	$1,960,474,000
Cost of services	493,604,000	551,493,000	1,578,940,000	1,678,470,000
General and administrative expenses	41,756,000	50,776,000	132,515,000	148,670,000
Operating Income	32,039,000	42,759,000	107,081,000	133,334,000
Interest expense	-4,104,000	-4,110,000	-12,217,000	-12,267,000
Interest income	167,000	118,000	393,000	257,000
Other income (expense), net	-20,000	10,000	-64,000	-78,000
Income from operations before income taxes	28,082,000	38,777,000	95,193,000	121,246,000
Provision for income taxes	-9,614,000	-14,350,000	-34,994,000	-46,432,000
Equity in losses of unconsolidated subsidiaries	-750,000	0	-750,000	0
Net income	$17,718,000	$24,427,000	$59,449,000	$74,814,000
Class A Common Stock [Member]	'	'	'	'
Basic earnings per share	$0.48	$0.66	$1.60	$2.03
Basic weighted average common shares outstanding	23,944	23,760	23,896	23,700
Diluted earnings per share	$0.48	$0.66	$1.60	$2.03
Diluted weighted average common shares outstanding	23,982	23,778	23,933	23,743
Class B Common Stock [Member]	'	'	'	'
Basic earnings per share	$0.48	$0.66	$1.60	$2.03
Basic weighted average common shares outstanding	13,193	13,193	13,193	13,193
Diluted earnings per share	$0.48	$0.66	$1.60	$2.03
Diluted weighted average common shares outstanding	13,193	13,193	13,193	13,193

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$17,718	$24,427	$59,449	$74,814
Other Comprehensive Income (Loss):	'	'	'	'
Translation adjustment, net of tax	-8	-2	-12	-72
Total other comprehensive income (loss)	-8	-2	-12	-72
Comprehensive Income	$17,710	$24,425	$59,437	$74,742

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income	$59,449,000	$74,814,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	22,869,000	44,768,000
Deferred income taxes	15,352,000	5,079,000
Stock-based compensation	3,955,000	6,295,000
Equity in losses of unconsolidated subsidiaries	750,000	0
Gain on sale of property and equipment	-400,000	0
Excess tax benefits from the exercise of stock options	-53,000	-43,000
Change in assets and liabilitiesbnet of effects from acquired businesses:	'	'
Receivables-net	58,206,000	72,360,000
Contractual inventory	34,762,000	0
Prepaid expenses and other	9,418,000	9,181,000
Accounts payable and accrued expenses	-63,701,000	-13,160,000
Accrued salaries and related expenses	23,843,000	6,580,000
Billings in excess of revenue earned	-106,000	-20,027,000
Accrued retirement	2,098,000	1,400,000
Other	-388,000	1,016,000
Net cash flow from operating activities	166,054,000	188,263,000
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Acquisition of businesses, net of cash acquired	-11,382,000	-63,093,000
Purchases of property and equipment	-7,213,000	-8,393,000
Investment in capitalized software for internal use	-1,816,000	-2,215,000
Proceeds from sale of property and equipment	400,000	0
Investment in unconsolidated subsidiaries	-330,000	0
Proceeds from sale of investment	239,000	185,000
Proceeds from disposition of a business	0	1,799,000
Net cash flow from investing activities	-20,102,000	-71,717,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Dividends paid	-23,379,000	-23,257,000
Proceeds from exercise of stock options	1,144,000	1,115,000
Excess tax benefits from the exercise of stock options	53,000	43,000
Net cash flow from financing activities	-22,182,000	-22,099,000
NET CHANGE IN CASH AND CASH EQUIVALENTS	123,770,000	94,447,000
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	134,896,000	114,483,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	258,666,000	208,930,000
SUPPLEMENTAL CASH FLOW INFORMATION	'	'
Cash paid for income taxes	12,824,000	15,135,000
Cash paid for interest	8,314,000	8,157,000
Noncash investing and financing activities:	'	'
Employee stock ownership plan contributions	1,287,000	2,978,000
Capital expenditures incurred but not yet paid	$0	$2,195,000

Introduction_and_Overview

Introduction and Overview	9 Months Ended
	Sep. 30, 2013
Introduction And Overview [Abstract]	'
Introduction and Overview	'
	Introduction and Overview
	ManTech International Corporation (depending on the circumstances, “ManTech,” “Company,” “we,” “our,” “ours” or “us”) is a leading provider of innovative technologies and solutions for mission-critical national security programs for the intelligence community; the departments of Defense, State, Homeland Security, Energy and Justice, including the Federal Bureau of Investigation (FBI); the healthcare and space communities; and other U.S. federal government customers. We provide support to critical national security programs for approximately 50 federal agencies through over 1,000 current contracts. Our services include the following solution sets that are aligned with the long-term needs of our customers: command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) solutions and services; cyber security; global logistics support; information technology (IT) modernization and sustainment; intelligence/counter-intelligence solutions and support; systems engineering; test and evaluation; environmental, range and sustainability services; and healthcare analytics and IT. We support major national missions, such as military readiness and wellness, terrorist threat detection, information security and border protection. Our employees operate primarily in the United States, as well as in numerous locations internationally.

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and note disclosures normally included in the annual financial statements, prepared in accordance with accounting principles generally accepted in the United States of America, have been condensed or omitted pursuant to those rules and regulations. We recommend that you read these unaudited condensed consolidated financial statements in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2012, previously filed with the SEC. We believe that the unaudited condensed consolidated financial statements in this Form 10-Q reflect all adjustments that are necessary to fairly present the financial position, results of operations and cash flows for the interim periods presented. The results of operations for such interim periods are not necessarily indicative of the results that can be expected for the full year.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Acquisitions	'
	Acquisitions
	Our acquisitions have been accounted for using the acquisition method of accounting under Accounting Standards Codification (ASC) 805, Business Combinations.
	ALTA Systems, Inc.-On January 8, 2013, we completed the acquisition of ALTA Systems, Inc. (ALTA). The results of ALTA's operations have been included in our consolidated financial statements since that date. The acquisition was completed through a stock purchase agreement dated January 8, 2013, by and among ManTech International Corporation, ALTA Holdings LLC and the sole member of ALTA Holding LLC. ALTA is an information technology (IT) and professional services company with valuable applications in healthcare systems and capital planning. ALTA provides a broad range of IT and professional services to government and private industry in three major areas: capital planning and investment control; system design, development and operations; and fraud detection and statistical analysis. The acquisition allows ManTech to deliver technology services through ALTA's prime position on the Centers for Medicare and Medicaid Services (CMS) Enterprise Systems Development (ESD) contract. ManTech funded the acquisition with cash on hand. The stock purchase agreement did not contain provisions for contingent consideration.
	During the nine months ended September 30, 2013, ManTech incurred approximately $0.1 million of acquisition costs related to the ALTA transaction, which are included in the general and administrative expense in our condensed consolidated statement of income.
	The purchase price of $10.2 million was allocated to the underlying assets and liabilities based on their estimated fair value at the date of acquisition. We have recorded total assets of $11.1 million, including goodwill and intangible assets recognized in connection with the acquisition, and total liabilities of $0.9 million. Included in total assets were $0.7 million in acquisition related intangible assets. We recorded goodwill of $9.1 million, which will be deductible for tax purposes over 15 years, assuming adequate levels of taxable income. Recognition of goodwill is largely attributed to the value paid for ALTA's capabilities in providing technology services to the federal government in the health care sector.
	In allocating the purchase price, we considered among other factors, analysis of historical financial performance and estimates of future performance of ALTA's contracts. The components of other intangible assets associated with the acquisition were customer relationships and backlog valued at $0.6 million and $0.1 million, respectively. Customer contracts and related relationships represent the underlying relationships and agreements with ALTA's existing customers. Customer relationships and backlog are amortized straight-line over their estimated useful lives of approximately 20 years and 1 year, respectively. The weighted-average amortization period for the intangible assets is 17.1 years.
	HBGary, Inc.-On April 2, 2012, we completed the acquisition of certain assets of HBGary, Inc. (HBGary). The results of HBGary's operations have been included in our consolidated financial statements since that date. The acquisition was completed through an asset purchase agreement dated February 27, 2012, by and among a subsidiary of ManTech International Corporation, HBGary and the shareholders of HBGary. HBGary provides a comprehensive suite of software products to detect, analyze and diagnose Advance Persistent Threats and targeted malware. The company has customers in the financial services, energy, critical infrastructure and technology sectors. This acquisition broadened our cyber security solution capability for customers. ManTech funded the acquisition with cash on hand. The asset purchase agreement did not contain provisions for contingent consideration.
	During the nine months ended September 30, 2012, ManTech incurred approximately $0.8 million of acquisition costs related to the HBGary transaction, which are included in the general and administrative expense in our condensed consolidated statement of income.
	The purchase price of $23.8 million was allocated to the underlying assets and liabilities based on their fair value at the date of acquisition. Total assets were $24.6 million, including goodwill and intangible assets recognized in connection with the acquisition, and total liabilities were $0.8 million. Included in total assets were $3.1 million in acquisition related intangible assets. We recorded goodwill of $20.1 million, which will be deductible for tax purposes over 15 years, assuming adequate levels of taxable income. Recognition of goodwill is largely attributed to the value paid for HBGary's capabilities in providing cyber service and product solutions to both federal and commercial customers.
	The components of other intangible assets associated with the acquisition were developed technology, customer relationships and trademark valued at $2.0 million, $0.9 million and $0.2 million, respectively. Developed technology represents the software developed by HBGary to detect, analyze and diagnose Advanced Persistent Threats and targeted malware. Customer relationships represent the underlying relationship with HBGary customers in the financial services, energy, critical infrastructure and technology sectors. Trademark represents the HBGary trade name that is recognized in the industry. Developed technology, customer relationships and trademark are amortized straight-line over their estimated useful lives of approximately 3 years, 2 years and 2 years, respectively. The weighted-average amortization period for the intangible assets is 2.5 years.
	Evolvent Technologies, Inc.-On January 6, 2012, we completed the acquisition of Evolvent Technologies, Inc. (Evolvent). The results of Evolvent's operations have been included in our consolidated financial statements since that date. The acquisition was completed through an equity purchase agreement dated January 6, 2012, by and among ManTech, shareholders and warrantholders of the parent of Evolvent, Evolvent, and Prudent Management, LLC in its capacity as the sellers' representative. Evolvent provides services in clinical IT, clinical business intelligence, imaging cyber security, behavioral health, tele-health, software development and systems integration. Its systems and processes enable better decision-making at the point of care and full integration of medical information across different platforms. This acquisition has enabled ManTech to expand its customer relationships and deliver IT solutions through Evolvent's existing relationships with the Department of Defense health organizations, the Veterans Administration and the Department of Health and Human Services. ManTech funded the acquisition with cash on hand. The equity purchase agreement did not contain provisions for contingent consideration.
	During the nine months ended September 30, 2012, the Company incurred $0.2 million of acquisition costs associated with the Evolvent transaction, which are included in general and administrative expense in our condensed consolidated statement of income.
	The purchase price of $39.9 million was allocated to the underlying assets and liabilities based on their fair value at the date of acquisition. Total assets were $46.9 million, including goodwill and intangible assets recognized in connection with the acquisition, and total liabilities were $7.0 million. Included in total assets were $3.7 million in acquisition related intangible assets. We recorded goodwill of $33.2 million, which is not deductible for tax purposes. Recognition of goodwill is largely attributed to the highly skilled employees and the value paid for Evolvent's capabilities in providing IT services and solutions to the federal government healthcare sector.
	In allocating the purchase price, we considered among other factors, analyses of historical performance and estimates of future performance of Evolvent's contracts. The components of other intangible assets associated with the acquisition were customer relationships and backlog valued at $3.4 million and $0.3 million, respectively. Customer contracts and related relationships represent the underlying relationships and agreements with Evolvent's existing customers. Customer relationships and backlog are amortized over their estimated useful lives of 20 years and 1 year, respectively, using the pattern of benefits method. The weighted-average amortization period for the intangible assets is 18.5 years.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	Under ASC 260, Earnings per Share, the two-class method is an earnings allocation formula that determines earnings per share for each class of common stock according to dividends declared (or accumulated) and participation rights in undistributed earnings. Under that method, basic and diluted earnings per share data are presented for each class of common stock.
	In applying the two-class method, we determined that undistributed earnings should be allocated equally on a per share basis between Class A and Class B common stock. Under the Company’s Certificate of Incorporation, the holders of the common stock are entitled to participate ratably, on a share-for-share basis as if all shares of common stock were of a single class, in such dividends, as may be declared by the Board of Directors. During each of the nine month periods ended September 30, 2013 and 2012, we declared and paid three quarterly dividends in the amount of $0.21 per share on both classes of common stock.
	Basic earnings per share has been computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during each period. Shares issued during the period and shares reacquired during the period are weighted for the portion of the period in which the shares were outstanding. Diluted earnings per share has been computed in a manner consistent with that of basic earnings per share while giving effect to all potentially dilutive common shares that were outstanding during each period.
	The net income available to common stockholders and weighted average number of common shares outstanding used to compute basic and diluted earnings per share for each class of common stock are as follows (in thousands, except per share amounts):
		Three months ended				Nine months ended
		September 30,				September 30,
		2013		2012		2013		2012
	Distributed earnings	$	7,804	$	7,771	$	23,389	$	23,272
	Undistributed earnings	9,914		16,656		36,060		51,542
	Net income	$	17,718	$	24,427	$	59,449	$	74,814
	Class A common stock:
	Basic net income available to common stockholders	$	11,424	$	15,707	$	38,302	$	48,061
	Basic weighted average common shares outstanding	23,944		23,760		23,896		23,700
	Basic earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Diluted net income available to common stockholders	$	11,430	$	15,711	$	38,324	$	48,092
	Effect of potential exercise of stock options	38		18		37		43
	Diluted weighted average common shares outstanding	23,982		23,778		23,933		23,743
	Diluted earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Class B common shares:
	Basic net income available to common stockholders	$	6,294	$	8,720	$	21,147	$	26,753
	Basic weighted average common shares outstanding	13,193		13,193		13,193		13,193
	Basic earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Diluted net income available to common stockholders	$	6,288	$	8,716	$	21,125	$	26,722
	Effect of potential exercise of stock options	—		—		—		—
	Diluted weighted average common shares outstanding	13,193		13,193		13,193		13,193
	Diluted earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	For the three months ended September 30, 2013 and 2012, options to purchase 3.0 million and 2.9 million shares, respectively, were outstanding but not included in the computation of diluted earnings per share because the options’ effect would have been anti-dilutive. For the nine months ended September 30, 2013 and 2012, options to purchase 3.3 million and 2.9 million shares, respectively, were outstanding but not included in the computation of diluted earnings per share because the options' effect would have been anti-dilutive. For the nine months ended September 30, 2013 and 2012, shares issued from the exercise of stock option were 54 thousand and 37 thousand, respectively.

Receivables

Receivables	9 Months Ended
	Sep. 30, 2013
Accounts Receivable, Net [Abstract]	'
Receivables	'
	Receivables
	We deliver a broad array of information technology and technical services solutions under contracts with the U.S. government, state and local governments and commercial customers. The components of contract receivables are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Billed receivables	$	395,718		$	420,598
	Unbilled receivables:
	Amounts billable	96,113			119,893
	Revenues recorded in excess of funding	7,139			11,148
	Retainage	2,395			6,119
	Allowance for doubtful accounts	(10,090		)	(9,449		)
	Receivables-net	$	491,275		$	548,309
	Amounts billable consist principally of amounts to be billed within the next month. Revenues recorded in excess of funding are billable upon receipt of contractual amendments or other modifications. Revenues recorded in excess of milestone billings on fixed price contracts consist of amounts not expected to be billed within the next month. The retainage is billable upon completion of contract performance and approval of final indirect expense rates by the government. Accounts receivable at September 30, 2013, are expected to be substantially collected within one year except for approximately $1.6 million, of which amount 91.7% is related to receivables from direct sales to the U.S. government. The remainder is related to receivables from contracts in which we acted as a subcontractor to other contractors.
	The Company does not believe it has significant exposure to credit risk as accounts receivable and the related unbilled amounts are primarily due from the U.S. government. The allowance for doubtful accounts represents the Company’s exposure to compliance issues, contractual issues and bad debt related to prime contractors.

Property_And_Equipment

Property And Equipment	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Property And Equipment	'
	Property and Equipment
	Major classes of property and equipment are summarized as follows (in thousands):
		September 30, 2013			December 31, 2012
	Furniture and equipment	$	50,934		$	94,934
	Leasehold improvements	31,034			28,932
		81,968			123,866
	Less: Accumulated depreciation and amortization	(52,915		)	(95,278		)
	Total property and equipment, net	$	29,053		$	28,588

Goodwill_And_Other_Intangible_

Goodwill And Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill And Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	During the nine months ended September 30, 2013, there was an increase in goodwill related to the acquisition of ALTA as well as an immaterial acquisition. The changes in the carrying amounts of goodwill during the year ended December 31, 2012 and the period ended September 30, 2013 are as follows (in thousands):
		Goodwill Balance
	Balance at December 31, 2011	$	808,455
	Additional consideration for the acquisition of Worldwide Information Network Systems, Inc.	212
	Acquisition-Evolvent	33,175
	Acquisition-HBGary	20,070
	Balance at December 31, 2012	$	861,912
	Acquisition-ALTA	9,081
	Other	301
	Balance at September 30, 2013	$	871,294
	Other intangible assets consisted of the following (in thousands):
		September 30, 2013						December 31, 2012
		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Other intangible assets:
	Contract and program intangible assets	$	251,572	$	105,298	$	146,274	$	249,882	$	92,400	$	157,482
	Capitalized software cost for internal use	32,796		22,823		9,973		30,985		20,637		10,348
	Other	115		42		73		115		35		80
	Total other intangible assets, net	$	284,483	$	128,163	$	156,320	$	280,982	$	113,072	$	167,910
	Amortization expense relating to intangible assets for the three months ended September 30, 2013 and 2012 was $5.1 million and $5.3 million, respectively. Amortization expense relating to intangible assets for the nine months ended September 30, 2013 and 2012 was $15.3 million and $15.2 million, respectively. We estimate that we will have the following amortization expense for the future periods indicated below (in thousands):
	For the remaining three months ending December 31, 2013	$	5,073
	For the year ending:
	December 31, 2014	$	18,254
	December 31, 2015	$	15,650
	December 31, 2016	$	13,650
	December 31, 2017	$	11,924
	December 31, 2018	$	10,754

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Long-term Debt
	Long-term debt consisted of the following (in thousands):
		September 30, 2013		December 31, 2012
	Revolving credit facility	$	—	$	—
	7.25% senior unsecured notes	200,000		200,000
	Long-term debt	$	200,000	$	200,000
	Revolving Credit Facility-We maintain a credit agreement with a syndicate of lenders led by Bank of America, N.A, as administrative agent. The credit agreement provides for a $500.0 million revolving credit facility, with a $25.0 million letter of credit sublimit and a $30.0 million swing line loan sublimit. The credit agreement also contains an accordion feature that permits the Company to arrange with the lenders for the provision of up to $250.0 million in additional commitments. The maturity date for the credit agreement is October 12, 2016.
	Borrowings under the credit agreement are collateralized by substantially all the assets of ManTech and its Material Subsidiaries (as defined in the credit agreement) and bear interest at one of the following variable rates as selected by the Company at the time of borrowing: a London Interbank Offer Rate (LIBOR) based rate plus market-rate spreads (1.25% to 2.25% based on the Company's consolidated total leverage ratio) or Bank of America's base rate plus market spreads (0.25% to 1.25% based on the Company's consolidated total leverage ratio).
	The terms of the credit agreement permit prepayment and termination of the loan commitments at any time, subject to certain conditions. The credit agreement requires the Company to comply with specified financial covenants, including the maintenance of certain leverage ratios and a certain fixed charge coverage ratio. The credit agreement also contains various covenants, including affirmative covenants with respect to certain reporting requirements and maintaining certain business activities, and negative covenants that, among other things, may limit or impose restrictions on our ability to incur liens, incur additional indebtedness, make investments, make acquisitions and undertake certain other actions. As of September 30, 2013, we were in compliance with our financial covenants under the credit agreement.
	There was no outstanding balance on our revolving credit facility at September 30, 2013 and December 31, 2012. The maximum available borrowing under the revolving credit facility at September 30, 2013 was $499.8 million. As of September 30, 2013, we were contingently liable under letters of credit totaling $0.2 million, which reduced our availability to borrow under our revolving credit facility.
	The following table summarizes the activity under our revolving credit facility for the nine months ended September 30, 2013 and 2012 (in thousands):
		Nine months ended
		September 30,
		2013		2012
	Borrowings under revolving credit facility	$	—	$	9,000
	Repayment of borrowings under revolving credit facility	$	—	$	(9,000	)
	7.25% Senior Unsecured Notes-We have $200.0 million in aggregate principal amount of 7.25% senior unsecured notes that are registered under the Securities Act of 1933, as amended. The fair value of the 7.25% senior unsecured notes as of September 30, 2013 was approximately $211.6 million based on quoted market prices.
	The 7.25% senior unsecured notes were issued on April 13, 2010 and mature on April 15, 2018 with interest payable semi-annually in April and October. The 7.25% senior unsecured notes were issued at 100% of the aggregate principal amount and are effectively subordinate to the Company’s existing and future senior secured debt (to the extent of the value of the assets securing such debt), including debt outstanding under our revolving credit facility. The 7.25% senior unsecured notes may be redeemed, in whole or in part, at any time, at the option of the Company, subject to certain conditions specified in the indenture governing the 7.25% senior unsecured notes. The 7.25% senior unsecured notes are guaranteed, jointly and severally, on a senior unsecured basis by each of our 100% owned domestic subsidiaries that also guaranteed debt obligations under our prior revolving credit facility or that guarantees debt obligations under our revolving credit facility.
	The issuance costs incurred by the Company are being amortized to interest expense over the contractual life of the 7.25% senior unsecured notes using the effective interest rate method, resulting in an effective rate of 7.67%.
	The indenture governing the 7.25% senior unsecured notes contains customary events of default, as well as restrictive covenants, which, subject to important exceptions and qualifications specified in such indenture, will, among other things, limit our ability and the ability of our subsidiaries that guarantee the 7.25% senior unsecured notes to: pay dividends or distributions, repurchase equity, prepay subordinated debt or make certain investments; incur additional debt or issue certain disqualified stock and preferred stock; incur liens on assets; merge or consolidate with another company or sell all or substantially all assets; and allow to exist certain control provisions. An event of default under the indenture will allow either the trustee of the notes or the holders of at least 25% in principal amount of the then outstanding notes to accelerate, or in certain cases, will automatically cause the acceleration of, the amounts due under the notes. As of September 30, 2013, the Company was in compliance with all required covenants under the indenture.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	Commitments and Contingencies
	Contracts with the U.S. government, including subcontracts, are subject to extensive legal and regulatory requirements and, from time to time, agencies of the U.S. government, in the ordinary course of business, investigate whether the Company’s operations are conducted in accordance with these requirements and the terms of the relevant contracts. U.S. government investigations of the Company, whether related to the Company’s U.S. government contracts or conducted for other reasons, could result in administrative, civil, or criminal liabilities, including repayment, fines or penalties being imposed upon the Company, or could lead to suspension or debarment from future U.S. government contracting activities. Management believes it has adequately reserved for any losses that may be experienced from any investigation of which it is aware. The Defense Contract Audit Agency (DCAA) has completed our incurred cost audits through 2002 and the majority of audits for 2003, 2004 and 2005, which resulted in no material adjustments. The remaining audits for 2003 through 2012 are not expected to have a material effect on our financial position, results of operations or cash flow, and management believes it has adequately reserved for any losses.
	In the normal course of business, we are involved in certain governmental and legal proceedings, claims and disputes and have litigation pending under several suits. We believe that the ultimate resolution of these matters will not have a material effect on our financial position, results of operations or cash flows.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
Share-based Compensation [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	Our 2011 Management Incentive Plan (the Plan) was designed to attract, retain and motivate key employees. Awards granted under the Plan are settled in shares of Class A common stock. At the beginning of each year, the Plan provides that the number of shares available for issuance automatically increases by an amount equal to 1.5% of the total number of shares of Class A and Class B common stock outstanding on December 31st of the previous year. On January 2, 2013, 555,638 additional shares were made available for issuance under the Plan. Through September 30, 2013, the remaining aggregate number of shares of our common stock authorized for issuance under the Plan was 3,808,122. Through September 30, 2013, there were 4,590,742 shares of our Class A common stock that were issued and remain outstanding as a result of equity awards granted under the Plan. The Plan expires in May 2021.
	The Plan is administered by the compensation committee of our Board of Directors, along with its delegates. Subject to the express provisions of the Plan, the committee has the Board of Directors’ authority to administer and interpret the Plan, including the discretion to determine the exercise price, vesting schedule, contractual life and the number of shares to be issued.
	Stock Compensation Expense-For the three months ended September 30, 2013 and 2012, we recorded $1.2 million and $1.9 million of stock-based compensation expense, respectively. For the nine months ended September 30, 2013 and 2012, we recorded $4.0 million and $6.3 million of stock-based compensation expense, respectively. No compensation expense of employees with stock awards, including stock-based compensation expense, was capitalized during the periods. For the nine months ended September 30, 2013 and 2012, the total recognized tax deficiency from the exercise of stock options, vested cancellations and the vesting of restricted stock was $2.0 million and $0.6 million, respectively.
	Stock Options-We typically issue options that vest over three years in equal annual installments beginning on the first anniversary of the date of grant. Under the terms of the Plan, the contractual life of the option grants may not exceed eight years. During the nine months ended September 30, 2013 and 2012, we issued options that expire five years from the date of grant.
	Fair Value Determination-We have used the Black-Scholes-Merton option pricing model to determine fair value of our awards on the date of grant. We will reconsider the use of the Black-Scholes-Merton model if additional information becomes available in the future that indicates another model would be more appropriate or if grants issued in future periods have characteristics that cannot be reasonably estimated under this model.
	The following weighted-average assumptions were used for option grants during the nine months ended September 30, 2013 and 2012:
	Volatility-The expected volatility of the options granted was estimated based upon historical volatility of the Company’s share price through weekly observations of the Company’s trading history.
	Expected Term-The expected term of options granted to employees during the nine months ended September 30, 2013 and 2012 was determined from historical exercises of the grantee population. For all grants valued during the nine months ended September 30, 2013 and 2012, the options had graded vesting over three years in equal annual installments beginning on the first anniversary of the date of grant and a contractual term of five years.
	Risk-free Interest Rate-The yield on zero-coupon U.S. Treasury strips was used to extrapolate a forward-yield curve. This “term structure” of future interest rates was then input into numeric model to provide the equivalent risk-free rate to be used in the Black-Scholes-Merton model based on the expected term of the underlying grants.
	Dividend Yield-The Black-Scholes-Merton valuation model requires an expected dividend yield as an input. We have calculated our expected dividend yield based on an expected annual cash dividend of $0.84 per share.
	The following table summarizes weighted-average assumptions used in our calculations of fair value for the nine months ended September 30, 2013 and 2012:
		Nine months ended
		September 30,
		2013		2012
	Volatility	32.45	%	30.49	%
	Expected life of options (in years)	3.14		3.04
	Risk-free interest rate	0.44	%	0.55	%
	Dividend yield	3	%	2.29	%
	Stock Option Activity-During the nine months ended September 30, 2013, we granted stock options to purchase 488,850 shares of Class A common stock at a weighted-average exercise price of $26.96 per share, which reflects the fair market value of the shares on the date of grant. The weighted-average fair value of options granted during the nine months ended September 30, 2013 and 2012, as determined under the Black-Scholes-Merton valuation model, was $4.81 and $5.91, respectively. These options vest over three years in equal annual installments beginning on the first anniversary of the date of the grant and have a contractual term of five years. Option grants that vested during the nine months ended September 30, 2013 and 2012 had a combined fair value of $4.6 million and $6.9 million, respectively.
	The following table includes information with respect to stock option activity and stock options outstanding for the year ended December 31, 2012 and the nine months ended September 30, 2013:
		Number of Shares		Weighted Average Exercise Price				Aggregate Intrinsic Value
								(in thousands)
	Shares under option, December 31, 2011	2,886,110		$	41.14			$	1,096
	Options granted	986,650		$	29.24
	Options exercised	(38,542	)	$	28.93			$	215
	Options cancelled and expired	(413,022	)	$	39.27
	Shares under option, December 31, 2012	3,421,196		$	38.61			$	626
	Options granted	488,850		$	26.96
	Options exercised	(54,000	)	$	21.2			$	330
	Options cancelled and expired	(717,125	)	$	40.27
	Shares under option, September 30, 2013	3,138,921		$	36.72			$	2,631
	The following table summarizes non-vested stock options for the nine months ended September 30, 2013:
		Number of Shares		Weighted Average Fair Value
	Non-vested stock options at December 31, 2012	1,697,992		$	7.37
	Options granted	488,850		$	4.81
	Vested during the period	(450,128	)	$	10.31
	Options cancelled	(275,481	)	$	6.66
	Non-vested stock options at September 30, 2013	1,461,233		$	5.74
	The following table includes information concerning stock options exercisable and stock options expected to vest at September 30, 2013:
		Number of Shares		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Aggregate Intrinsic Value
				(years)						(in thousands)
	Stock options exercisable	1,677,688		1.6		$	42.62			$	575
	Stock options expected to vest	1,281,281		3.8		$	30.09			$	1,770
	Stock options exercisable and expected to vest	2,958,969
	Unrecognized compensation expense related to outstanding stock options expected to vest as of September 30, 2013 was $4.8 million, which is expected to be recognized over a weighted-average period of 2.0 years and will be adjusted for any future changes in estimated forfeitures.
	Restricted Stock-Under the Plan, we have issued restricted stock. A restricted stock award is an issuance of shares that cannot be sold or transferred by the recipient until the vesting period lapses. Restricted shares issued to employees vest over three years in equal annual installments beginning on the first anniversary of the grant date, contingent upon employment with the Company on the vesting dates. Restricted shares issued to members of our Board of Directors vest in one year. The related compensation expense is recognized over the service period and is based on the grant date fair value of the stock and the number of shares expected to vest.
	Restricted Stock Activity-The following table summarizes the restricted stock activity for the year ended December 31, 2012 and the nine months ended September 30, 2013:
		Number of Shares		Grant Date Fair Value
				(in thousands)
	Non-vested at December 31, 2011	30,667
	Granted	24,000		$	576
	Vested	(27,334	)	$	1,237
	Forfeited	—
	Non-vested at December 31, 2012	27,333
	Granted	24,000		$	664
	Vested	(27,333	)	$	742
	Forfeited	—
	Non-vested at September 30, 2013	24,000

Business_Segment_And_Geographi

Business Segment And Geographic Area Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Business Segment And Geographic Area Information	'
	Business Segment and Geographic Area Information
	We have one reportable segment. We deliver a broad array of information technology and technical services solutions under contracts with the U.S. government, state and local governments and commercial customers. Our federal government customers typically exercise independent contracting authority, and even offices or divisions within an agency or department may directly, or through a prime contractor, use our services as a separate customer so long as that customer has independent decision-making and contracting authority within its organization. Revenues from the U.S. government under prime contracts and subcontracts were approximately 99.0% and 99.2% of our total revenues for the nine months ended September 30, 2013 and 2012, respectively. We treat sales to U.S. government customers as sales within the United States regardless of where the services are performed. Furthermore, substantially all of our assets from continuing operations were held in the United States for the periods ended September 30, 2013 and December 31, 2012.
	Revenues by geographic customer and the related percentages of total revenues for the three and nine months ended September 30, 2013 and 2012 were as follows (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	United States	$	566,261	99.8	%	$	643,853	99.8	%	$	1,815,078	99.8	%	$	1,956,844	99.8	%
	International	1,138		0.2	%	1,175		0.2	%	3,458		0.2	%	3,630		0.2	%
	Total	$	567,399			$	645,028			$	1,818,536			$	1,960,474
	The following table includes contracts that exceeded 10% of our revenues for the three and nine months ended September 30, 2013 and 2012 (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	Revenues:
	Contract A	$	103,128	18.2	%	$	150,062	23.3	%	$	378,611	20.8	%	$	432,469	22.1	%
	All other contracts	464,271		81.8	%	494,966		76.7	%	1,439,925		79.2	%	1,528,005		77.9	%
	Total	$	567,399			$	645,028			$	1,818,536			$	1,960,474
	The following table includes contracts that exceeded 10% of our operating income for the three and nine months ended September 30, 2013 and 2012 (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	Operating Income:
	Contract A	$	3,894	12.2	%	$	8,889	20.8	%	$	15,690	14.7	%	$	27,737	20.8	%
	All other contracts	28,145		87.8	%	33,870		79.2	%	91,391		85.3	%	105,597		79.2	%
	Total	$	32,039			$	42,759			$	107,081			$	133,334
	The following table includes contracts that exceeded 10% of our receivables, net at September 30, 2013 and December 31, 2012 (dollars in thousands):
		September 30, 2013				December 31, 2012
	Receivables-net:
	Contract C	$	58,563	11.9	%	$	10,738	2	%
	Contract A	51,561		10.5	%	90,752		16.6	%
	Contract B	8,947		1.8	%	62,709		11.4	%
	All other contracts	372,204		75.8	%	384,110		70	%
	Total	$	491,275			$	548,309
	Disclosure items required under ASC 280, Segment Reporting, including interest income, interest expense, depreciation and amortization expense, expenses for stock-based compensation programs, certain unallowable costs as determined under Federal Acquisition Regulations and expenditures for segment assets are not applicable as we review those items on a consolidated basis.

Equity_Method_Investments

Equity Method Investments	9 Months Ended
	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Equity Method Investments	'
	Equity Method Investments
	On May 24, 2012, Fluor-ManTech Logistics Solutions, LLC (FMLS), a limited liability company, was created with Fluor International, Inc. and ManTech as the investees. Each investee has a 50% ownership interest in FMLS. Because we have the ability to exercise significant influence over FMLS we determined that the equity method of accounting will be used for our investment. Under the operating agreement, we are required to provide additional financial support for losses incurred by FMLS. We recorded $0.8 million and $0 in equity method losses for the nine months ended September 30, 2013 and 2012.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The net income available to common stockholders and weighted average number of common shares outstanding used to compute basic and diluted earnings per share for each class of common stock are as follows (in thousands, except per share amounts):
		Three months ended				Nine months ended
		September 30,				September 30,
		2013		2012		2013		2012
	Distributed earnings	$	7,804	$	7,771	$	23,389	$	23,272
	Undistributed earnings	9,914		16,656		36,060		51,542
	Net income	$	17,718	$	24,427	$	59,449	$	74,814
	Class A common stock:
	Basic net income available to common stockholders	$	11,424	$	15,707	$	38,302	$	48,061
	Basic weighted average common shares outstanding	23,944		23,760		23,896		23,700
	Basic earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Diluted net income available to common stockholders	$	11,430	$	15,711	$	38,324	$	48,092
	Effect of potential exercise of stock options	38		18		37		43
	Diluted weighted average common shares outstanding	23,982		23,778		23,933		23,743
	Diluted earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Class B common shares:
	Basic net income available to common stockholders	$	6,294	$	8,720	$	21,147	$	26,753
	Basic weighted average common shares outstanding	13,193		13,193		13,193		13,193
	Basic earnings per share	$	0.48	$	0.66	$	1.6	$	2.03
	Diluted net income available to common stockholders	$	6,288	$	8,716	$	21,125	$	26,722
	Effect of potential exercise of stock options	—		—		—		—
	Diluted weighted average common shares outstanding	13,193		13,193		13,193		13,193
	Diluted earnings per share	$	0.48	$	0.66	$	1.6	$	2.03

Receivables_Tables

Receivables (Tables)	9 Months Ended
	Sep. 30, 2013
Accounts Receivable, Net [Abstract]	'
Components of Contract Receivables	'
	The components of contract receivables are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Billed receivables	$	395,718		$	420,598
	Unbilled receivables:
	Amounts billable	96,113			119,893
	Revenues recorded in excess of funding	7,139			11,148
	Retainage	2,395			6,119
	Allowance for doubtful accounts	(10,090		)	(9,449		)
	Receivables-net	$	491,275		$	548,309

Property_And_Equipment_Tables

Property And Equipment (Tables)	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Major Classes Of Property And Equipment	'
	Major classes of property and equipment are summarized as follows (in thousands):
		September 30, 2013			December 31, 2012
	Furniture and equipment	$	50,934		$	94,934
	Leasehold improvements	31,034			28,932
		81,968			123,866
	Less: Accumulated depreciation and amortization	(52,915		)	(95,278		)
	Total property and equipment, net	$	29,053		$	28,588

Goodwill_And_Other_Intangible_1

Goodwill And Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes In Carrying Amounts Of Goodwill	'
	The changes in the carrying amounts of goodwill during the year ended December 31, 2012 and the period ended September 30, 2013 are as follows (in thousands):
		Goodwill Balance
	Balance at December 31, 2011	$	808,455
	Additional consideration for the acquisition of Worldwide Information Network Systems, Inc.	212
	Acquisition-Evolvent	33,175
	Acquisition-HBGary	20,070
	Balance at December 31, 2012	$	861,912
	Acquisition-ALTA	9,081
	Other	301
	Balance at September 30, 2013	$	871,294
Schedule Of Other Intangible Assets	'
	Other intangible assets consisted of the following (in thousands):
		September 30, 2013						December 31, 2012
		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Other intangible assets:
	Contract and program intangible assets	$	251,572	$	105,298	$	146,274	$	249,882	$	92,400	$	157,482
	Capitalized software cost for internal use	32,796		22,823		9,973		30,985		20,637		10,348
	Other	115		42		73		115		35		80
	Total other intangible assets, net	$	284,483	$	128,163	$	156,320	$	280,982	$	113,072	$	167,910
Schedule Of Future Period Amortization Expense	'
	We estimate that we will have the following amortization expense for the future periods indicated below (in thousands):
	For the remaining three months ending December 31, 2013	$	5,073
	For the year ending:
	December 31, 2014	$	18,254
	December 31, 2015	$	15,650
	December 31, 2016	$	13,650
	December 31, 2017	$	11,924
	December 31, 2018	$	10,754

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Components Of Long-term Debt	'
	Long-term debt consisted of the following (in thousands):
		September 30, 2013		December 31, 2012
	Revolving credit facility	$	—	$	—
	7.25% senior unsecured notes	200,000		200,000
	Long-term debt	$	200,000	$	200,000
Activity Under Revolving Credit Facility	'
	The following table summarizes the activity under our revolving credit facility for the nine months ended September 30, 2013 and 2012 (in thousands):
		Nine months ended
		September 30,
		2013		2012
	Borrowings under revolving credit facility	$	—	$	9,000
	Repayment of borrowings under revolving credit facility	$	—	$	(9,000	)

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation [Abstract]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
	The following table summarizes weighted-average assumptions used in our calculations of fair value for the nine months ended September 30, 2013 and 2012:
		Nine months ended
		September 30,
		2013		2012
	Volatility	32.45	%	30.49	%
	Expected life of options (in years)	3.14		3.04
	Risk-free interest rate	0.44	%	0.55	%
	Dividend yield	3	%	2.29	%
Schedule of Share-based Compensation, Stock Options, Activity	'
	The following table includes information with respect to stock option activity and stock options outstanding for the year ended December 31, 2012 and the nine months ended September 30, 2013:
		Number of Shares		Weighted Average Exercise Price				Aggregate Intrinsic Value
								(in thousands)
	Shares under option, December 31, 2011	2,886,110		$	41.14			$	1,096
	Options granted	986,650		$	29.24
	Options exercised	(38,542	)	$	28.93			$	215
	Options cancelled and expired	(413,022	)	$	39.27
	Shares under option, December 31, 2012	3,421,196		$	38.61			$	626
	Options granted	488,850		$	26.96
	Options exercised	(54,000	)	$	21.2			$	330
	Options cancelled and expired	(717,125	)	$	40.27
	Shares under option, September 30, 2013	3,138,921		$	36.72			$	2,631
Schedule of Non-Vested Share Activity	'
	The following table summarizes non-vested stock options for the nine months ended September 30, 2013:
		Number of Shares		Weighted Average Fair Value
	Non-vested stock options at December 31, 2012	1,697,992		$	7.37
	Options granted	488,850		$	4.81
	Vested during the period	(450,128	)	$	10.31
	Options cancelled	(275,481	)	$	6.66
	Non-vested stock options at September 30, 2013	1,461,233		$	5.74
Stock Options Exercisable And Expected To Vest	'
	The following table includes information concerning stock options exercisable and stock options expected to vest at September 30, 2013:
		Number of Shares		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Aggregate Intrinsic Value
				(years)						(in thousands)
	Stock options exercisable	1,677,688		1.6		$	42.62			$	575
	Stock options expected to vest	1,281,281		3.8		$	30.09			$	1,770
	Stock options exercisable and expected to vest	2,958,969
Schedule of Restricted Stock Activity	'
	The following table summarizes the restricted stock activity for the year ended December 31, 2012 and the nine months ended September 30, 2013:
		Number of Shares		Grant Date Fair Value
				(in thousands)
	Non-vested at December 31, 2011	30,667
	Granted	24,000		$	576
	Vested	(27,334	)	$	1,237
	Forfeited	—
	Non-vested at December 31, 2012	27,333
	Granted	24,000		$	664
	Vested	(27,333	)	$	742
	Forfeited	—
	Non-vested at September 30, 2013	24,000

Business_Segment_And_Geographi1

Business Segment And Geographic Area Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Schedule of Revenues by Geographic Customer and Related Percentage Of Total Revenues	'
	Revenues by geographic customer and the related percentages of total revenues for the three and nine months ended September 30, 2013 and 2012 were as follows (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	United States	$	566,261	99.8	%	$	643,853	99.8	%	$	1,815,078	99.8	%	$	1,956,844	99.8	%
	International	1,138		0.2	%	1,175		0.2	%	3,458		0.2	%	3,630		0.2	%
	Total	$	567,399			$	645,028			$	1,818,536			$	1,960,474
Contracts Exceeding 10% Of Revenues	'
	The following table includes contracts that exceeded 10% of our revenues for the three and nine months ended September 30, 2013 and 2012 (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	Revenues:
	Contract A	$	103,128	18.2	%	$	150,062	23.3	%	$	378,611	20.8	%	$	432,469	22.1	%
	All other contracts	464,271		81.8	%	494,966		76.7	%	1,439,925		79.2	%	1,528,005		77.9	%
	Total	$	567,399			$	645,028			$	1,818,536			$	1,960,474
Contracts Exceeding 10% Of Operating Income	'
	The following table includes contracts that exceeded 10% of our operating income for the three and nine months ended September 30, 2013 and 2012 (dollars in thousands):
		Three months ended								Nine months ended
		September 30,								September 30,
		2013				2012				2013				2012
	Operating Income:
	Contract A	$	3,894	12.2	%	$	8,889	20.8	%	$	15,690	14.7	%	$	27,737	20.8	%
	All other contracts	28,145		87.8	%	33,870		79.2	%	91,391		85.3	%	105,597		79.2	%
	Total	$	32,039			$	42,759			$	107,081			$	133,334
Contracts Exceeding 10% Of Receivables, net	'
	The following table includes contracts that exceeded 10% of our receivables, net at September 30, 2013 and December 31, 2012 (dollars in thousands):
		September 30, 2013				December 31, 2012
	Receivables-net:
	Contract C	$	58,563	11.9	%	$	10,738	2	%
	Contract A	51,561		10.5	%	90,752		16.6	%
	Contract B	8,947		1.8	%	62,709		11.4	%
	All other contracts	372,204		75.8	%	384,110		70	%
	Total	$	491,275			$	548,309

Introduction_and_Overview_Narr

Introduction and Overview (Narrative) (Details)	9 Months Ended
	Sep. 30, 2013
	contracts
	federalagenices
Introduction And Overview [Abstract]	'
Number Of Federal Agencies	50
Number Of Contracts	1,000

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
ALTA Systems, Inc [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Acquisition Related Costs	$0.10	'
Business Combination, Consideration Transferred	10.2	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	11.1	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0.9	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	0.7	'
Business Acquisition, Goodwill, Expected Tax Deductible Amount	9.1	'
Business Acquisition, Goodwill, Expected Tax Amortization Period	'15 years	'
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'17 years 1 month	'
ALTA Systems, Inc [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	0.6	'
Finite-Lived Intangible Asset, Useful Life	'20 years	'
ALTA Systems, Inc [Member] | Backlog [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	0.1	'
Finite-Lived Intangible Asset, Useful Life	'1 year	'
HBGary, Inc. [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Acquisition Related Costs	'	0.8
Business Combination, Consideration Transferred	'	23.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24.6	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0.8	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	3.1	'
Business Acquisition, Goodwill, Expected Tax Deductible Amount	20.1	'
Business Acquisition, Goodwill, Expected Tax Amortization Period	'15 years	'
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'2 years 6 months	'
HBGary, Inc. [Member] | Developed Technology [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	2	'
Finite-Lived Intangible Asset, Useful Life	'3 years	'
HBGary, Inc. [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	0.9	'
Finite-Lived Intangible Asset, Useful Life	'2 years	'
HBGary, Inc. [Member] | Trademarks [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	0.2	'
Finite-Lived Intangible Asset, Useful Life	'2 years	'
Evolvent Technologies, Inc. [Member]	'	'
Business Acquisition [Line Items]	'	'
Business Combination, Acquisition Related Costs	'	0.2
Business Combination, Consideration Transferred	'	39.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	46.9	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	7	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	3.7	'
Business Acquisition, Goodwill, Amount Not Tax Deductible	33.2	'
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'18 years 6 months	'
Evolvent Technologies, Inc. [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	3.4	'
Finite-Lived Intangible Asset, Useful Life	'20 years	'
Evolvent Technologies, Inc. [Member] | Backlog [Member]	'	'
Business Acquisition [Line Items]	'	'
Finite-lived Intangible Assets Acquired	$0.30	'
Finite-Lived Intangible Asset, Useful Life	'1 year	'

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Details) (USD $)	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
							dividends	dividends
Earnings Per Share [Abstract]	'	'	'	'	'	'	'	'	'
Number of Dividends Declared and Paid	'	'	'	'	'	'	3	3	'
Dividend Declared And Paid	$0.21	$0.21	$0.21	$0.21	$0.21	$0.21	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,000,000	'	'	2,900,000	'	'	3,300,000	2,900,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	'	'	'	'	'	'	54,000	36,542	38,542

Earnings_Per_Share_Schedule_of

Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components of Earnings Per Share, Basic and Diluted [Line Items]	'	'	'	'
Distributed earnings	$7,804	$7,771	$23,389	$23,272
Undistributed earnings	9,914	16,656	36,060	51,542
Net income	17,718	24,427	59,449	74,814
Class A Common Stock [Member]	'	'	'	'
Components of Earnings Per Share, Basic and Diluted [Line Items]	'	'	'	'
Basic net income available to common stockholders	11,424	15,707	38,302	48,061
Basic weighted average common shares outstanding	23,944	23,760	23,896	23,700
Basic earnings per share	$0.48	$0.66	$1.60	$2.03
Diluted net income available to common stockholders	11,430	15,711	38,324	48,092
Effect of potential exercise of stock options	38	18	37	43
Diluted weighted average common shares outstanding	23,982	23,778	23,933	23,743
Diluted earnings per share	$0.48	$0.66	$1.60	$2.03
Class B Common Stock [Member]	'	'	'	'
Components of Earnings Per Share, Basic and Diluted [Line Items]	'	'	'	'
Basic net income available to common stockholders	6,294	8,720	21,147	26,753
Basic weighted average common shares outstanding	13,193	13,193	13,193	13,193
Basic earnings per share	$0.48	$0.66	$1.60	$2.03
Diluted net income available to common stockholders	$6,288	$8,716	$21,125	$26,722
Effect of potential exercise of stock options	0	0	0	0
Diluted weighted average common shares outstanding	13,193	13,193	13,193	13,193
Diluted earnings per share	$0.48	$0.66	$1.60	$2.03

Receivables_Narrative_Details

Receivables (Narrative) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Accounts Receivable, Net [Abstract]	'
Accounts Receivable Not Expected to be Substantially Collected within One Year	$1.60
Percentage Of Accounts Receivable Not Expected to be Collected Within One Year related to Receivables from Direct Sales to U.S. Government	91.70%

Receivables_Components_of_Cont

Receivables (Components of Contract Receivables) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Receivable, Net [Abstract]	'	'
Billed receivables	$395,718	$420,598
Unbilled receivables, amounts billable	96,113	119,893
Unbilled receivables, revenues recorded in excess of funding	7,139	11,148
Unbilled receivables, retainage	2,395	6,119
Allowance for doubtful accounts	-10,090	-9,449
Receivables-net	$491,275	$548,309

Property_And_Equipment_Major_C

Property And Equipment (Major Classes Of Property And Equipment) (Table) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$81,968	$123,866
Less: Accumulated depreciation and amortization	-52,915	-95,278
Total property and equipment-net	29,053	28,588
Furniture and Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	50,934	94,934
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$31,034	$28,932

Goodwill_And_Other_Intangible_2

Goodwill And Other Intangible Assets (Changes In Carrying Amounts Of Goodwill) (Details) (USD $)	9 Months Ended		12 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2012	Sep. 30, 2013
			Worldwide Information Network Systems, Inc. [Member]	Evolvent Technologies, Inc. [Member]	HBGary, Inc. [Member]	ALTA Systems, Inc [Member]
Goodwill [Roll Forward]	'	'	'	'	'	'
Goodwill balance, period start	$861,912	$808,455	'	'	'	'
Additional consideration for the acquisition	'	'	212	'	'	'
Acquisition	'	'	'	33,175	20,070	9,081
Other	301	'	'	'	'	'
Goodwill balance, period end	$871,294	$808,455	'	'	'	'

Goodwill_And_Other_Intangible_3

Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$284,483	$280,982
Accumulated Amortization	128,163	113,072
Net Carrying Amount	156,320	167,910
Contract and program intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	251,572	249,882
Accumulated Amortization	105,298	92,400
Net Carrying Amount	146,274	157,482
Capitalized software cost for internal use [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	32,796	30,985
Accumulated Amortization	22,823	20,637
Net Carrying Amount	9,973	10,348
Other [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	115	115
Accumulated Amortization	42	35
Net Carrying Amount	$73	$80

Goodwill_And_Other_Intangible_4

Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Amortization expense related to intangible assets	$5.10	$5.30	$15.30	$15.20

Goodwill_And_Other_Intangible_5

Goodwill And Other Intangible Assets (Schedule of Future Period Amortization Expense) (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
For the remaining three months ending December 31, 2013	$5,073
For the year ending December 31, 2014	18,254
For the year ending December 31, 2015	15,650
For the year ending December 31, 2016	13,650
For the year ending December 31, 2017	11,924
For the year ending December 31, 2018	$10,754

LongTerm_Debt_Components_Of_Lo

Long-Term Debt (Components Of Long-term Debt) (Table) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Revolving credit facility	$0	$0
7.25% senior unsecured notes	200,000	200,000
Long-term debt	$200,000	$200,000

LongTerm_Debt_Revolving_Credit

Long-Term Debt (Revolving Credit Facility) (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013
	Minimum [Member]	Minimum [Member]	Maximum [Member]	Maximum [Member]	Bank of America Syndicate [Member]	Bank of America Syndicate [Member]	Bank of America Syndicate [Member]	Bank of America Syndicate [Member]
	London Interbank Offered Rate (LIBOR) [Member]	Bank of America [Member]	London Interbank Offered Rate (LIBOR) [Member]	Bank of America [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Letter of Credit [Member]	Revolving Credit Facility, Swing Line Loan [Member]
	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]	'	'	'	'	'	'	'	'
Line of Credit Facility, Maximum Borrowing Capacity	'	'	'	'	$500,000,000	'	$25,000,000	$30,000,000
Additional commitments with accordion feature	'	'	'	'	250,000,000	'	'	'
Debt Instrument, Basis Spread on Variable Rate	1.25%	0.25%	2.25%	1.25%	'	'	'	'
Line of Credit Facility, Amount Outstanding	'	'	'	'	0	0	200,000	'
Line of Credit Facility, Remaining Borrowing Capacity	'	'	'	'	$499,800,000	'	'	'

LongTerm_Debt_Activity_Under_R

Long-Term Debt (Activity Under Revolving Credit Facility) (Table) (Details) (Bank of America Syndicate [Member], Revolving Credit Facility [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Bank of America Syndicate [Member] | Revolving Credit Facility [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Borrowings under revolving credit facility	$0	$9,000
Repayment of borrowings under revolving credit facility	$0	($9,000)

LongTerm_Debt_Senior_Unsecured

Long-Term Debt (Senior Unsecured Notes) (Narrative) (Details) (USD $)	Sep. 30, 2013	Apr. 13, 2010
Debt Instrument [Line Items]	'	'
Wholly-owned Subsidiaries Percentage	100.00%	'
7.25% Senior Unsecured Notes [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, interest rate, stated percentage	7.25%	'
Debt instrument, face amount	$200,000,000	'
Debt instrument, fair value disclosure	$211,600,000	'
Issued percentage of aggregate principal amount	'	100.00%
Debt instrument, interest rate, effective percentage	7.67%	'
Holders of minimum percentage of principal amount	25.00%	'

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Jan. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Annual percentage increase in number of shares available for issuance	'	'	1.50%	'	'	'
Additional shares available for issuance under the plan	'	'	'	'	'	555,638
Number of Shares Authorized	3,808,122	'	3,808,122	'	'	'
Stock compensation expense	$1,200,000	$1,900,000	$4,000,000	$6,300,000	'	'
Compensation expense of employee with stock awards, including stock-based compensation expense, capitalized amount	0	0	0	0	'	'
Share-based Compensation, Tax Deficiency from Exercise of Stock Options, Vested Cancellations and Vesting of Restricted Stock	'	'	2,000,000	600,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'	'	'3 years	'3 years	'	'
Contractual Life Of Option Grants	'	'	'5 years	'5 years	'	'
Expected annual cash dividend	$0.84	'	$0.84	'	'	'
Share-based Payment Award, Options, Grants in Period	'	'	488,850	'	986,650	'
Options granted, weighted average exercise price	'	'	$26.96	'	$29.24	'
Options granted, Weighted Average Fair Value	'	'	$4.81	$5.91	'	'
Share-based Payment Award, Options, Vested in Period, Fair Value	'	'	4,600,000	6,900,000	'	'
Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized	$4,800,000	'	$4,800,000	'	'	'
Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized, Period for Recognition	'	'	'2 years	'	'	'
Restricted Stock Granted to Employees [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'	'	'3 years	'3 years	'	'
Restricted Stock Granted to Board of Directors [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'	'	'1 year	'1 year	'	'
Common Class A [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Number of shares issued and outstanding under plan	4,590,742	'	4,590,742	'	'	'
Maximum [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Contractual Life Of Option Grants	'	'	'8 years	'8 years	'	'

StockBased_Compensation_Schedu

Stock-Based Compensation (Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions) (Table) (Details)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation [Abstract]	'	'
Volatility	32.45%	30.49%
Expected life of options	'3 years 1 month 20 days	'3 years 0 months 14 days
Risk-free interest rate	0.44%	0.55%
Dividend yield	3.00%	2.29%

StockBased_Compensation_Schedu1

Stock-Based Compensation (Schedule of Share-based Compensation, Stock Options, Activity) (Table) (Details) (USD $)	9 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'	'
Shares under option, period start	3,421,196	2,886,110	2,886,110	'
Options granted, Number of Shares	488,850	'	986,650	'
Options exercised, Number of Shares	-54,000	-36,542	-38,542	'
Options cancelled and expired, Number of Shares	-717,125	'	-413,022	'
Shares under option, period end	3,138,921	'	3,421,196	'
Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'	'	'
Shares under option, weighted average exercise price start of period	$38.61	$41.14	$41.14	'
Options granted, weighted average exercise price	$26.96	'	$29.24	'
Options exercised, weighted average exercise price	$21.20	'	$28.93	'
Options cancelled and expired, weighted average exercise price	$40.27	'	$39.27	'
Shares under option, weighted average exercise price end of period	$36.72	'	$38.61	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'	'	'
Shares under option, aggregate intrinsic value	$2,631	'	$626	$1,096
Options exercised, aggregate intrinsic value	$330	'	$215	'

StockBased_Compensation_Schedu2

Stock-Based Compensation (Schedule Of Non-Vested Share Activity) (Table) (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested [Roll Forward]	'	'	'
Non-vested stock options, Number of Shares, Period Start	1,697,992	'	'
Options granted, Number of Shares	488,850	'	986,650
Vested during period, Number of Shares	-450,128	'	'
Options cancelled, Number of Shares	-275,481	'	'
Non-vested stock options, Number of Shares, Period End	1,461,233	'	1,697,992
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]	'	'	'
Non-vested stock options, Weighted Average Fair Value, Period Start	$7.37	'	'
Options granted, Weighted Average Fair Value	$4.81	$5.91	'
Vested during period, Weighted Average Fair Value	$10.31	'	'
Options cancelled, Weighted Average Fair Value	$6.66	'	'
Non-vested stock options, Weighted Average Fair Value, Period End	$5.74	'	$7.37

StockBased_Compensation_Stock_

Stock-Based Compensation (Stock Options Exercisable And Expected To Vest) (Table) (Details) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013
Share-based Compensation [Abstract]	'
Stock options exercisable, Number of Shares	1,677,688
Stock options expected to vest, Number of Shares	1,281,281
Stock options exercisable and expected to vest, Number of Shares	2,958,969
Stock options exercisable, Weighted Average Remaining Contractual Life	'1 year 7 months
Stock options exercisable, Weighted Average Exercise Price	$42.62
Stock options exercisable, Aggregate Intrinsic Value	$575
Stock options expected to vest, Weighted Average Remaining Contractual Life	'3 years 9 months
Stock options expected to vest, Weighted Average Exercise Price	$30.09
Stock options expected to vest, Aggregate Intrinsic Value	$1,770

StockBased_Compensation_Schedu3

Stock-Based Compensation (Schedule Of Restricted Stock Activity) (Table) (Details) (Restricted Stock [Member], USD $)	9 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Non-vested [Roll Forward]	'	'
Non-vested, Number of Shares, Period Start	27,333	30,667
Granted, Number of Shares	24,000	24,000
Vested, Number of Shares	-27,333	-27,334
Forfeited, Number of Shares	0	0
Non-vested, Number of Shares, Period End	24,000	27,333
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'
Granted, Grant Date Fair Value	$664	$576
Vested, Grant Date Fair Value	$742	$1,237

Business_Segment_And_Geographi2

Business Segment And Geographic Area Information (Narrative) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]	'	'	'	'	'
Number of reportable segments	'	'	1	'	'
Major Contract Benchmark	10.00%	10.00%	10.00%	10.00%	10.00%
Revenues [Member] | U.S. government under prime contracts and subcontracts [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Percentage	'	'	99.00%	99.20%	'

Business_Segment_And_Geographi3

Business Segment And Geographic Area Information (Schedule of Revenues by Geographic Customer and Related Percentage of Total Revenues) (Table) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	$567,399	$645,028	$1,818,536	$1,960,474
Revenues [Member] | United States	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	566,261	643,853	1,815,078	1,956,844
Percentage	99.80%	99.80%	99.80%	99.80%
Revenues [Member] | International [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	$1,138	$1,175	$3,458	$3,630
Percentage	0.20%	0.20%	0.20%	0.20%

Business_Segment_And_Geographi4

Business Segment And Geographic Area Information (Contracts Exceeding 10% Of Revenues) (Table) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues, Major Customer [Line Items]	'	'	'	'
Revenues	$567,399	$645,028	$1,818,536	$1,960,474
Revenues [Member] | Contract A [Member]	'	'	'	'
Revenues, Major Customer [Line Items]	'	'	'	'
Revenues	103,128	150,062	378,611	432,469
Percentage	18.20%	23.30%	20.80%	22.10%
Revenues [Member] | All Other Contracts [Member]	'	'	'	'
Revenues, Major Customer [Line Items]	'	'	'	'
Revenues	$464,271	$494,966	$1,439,925	$1,528,005
Percentage	81.80%	76.70%	79.20%	77.90%

Business_Segment_And_Geographi5

Business Segment And Geographic Area Information (Contract Exceeding 10% Of Operating Income) (Table) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Operating Income by Major Customer [Line Items]	'	'	'	'
Operating Income (Loss)	$32,039	$42,759	$107,081	$133,334
Operating Income [Member] | Contract A [Member]	'	'	'	'
Schedule of Operating Income by Major Customer [Line Items]	'	'	'	'
Operating Income (Loss)	3,894	8,889	15,690	27,737
Percentage	12.20%	20.80%	14.70%	20.80%
Operating Income [Member] | All Other Contracts [Member]	'	'	'	'
Schedule of Operating Income by Major Customer [Line Items]	'	'	'	'
Operating Income (Loss)	$28,145	$33,870	$91,391	$105,597
Percentage	87.80%	79.20%	85.30%	79.20%

Business_Segment_And_Geographi6

Business Segment And Geographic Area Information (Contract Exceeding 10% Of Receivables, net) (Table) (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Receivables, net by Major Customer [Line Items]	'	'
Receivables-net	$491,275	$548,309
Receivables [Member] | Contract C [Member]	'	'
Schedule of Receivables, net by Major Customer [Line Items]	'	'
Receivables-net	58,563	10,738
Percentage	11.90%	2.00%
Receivables [Member] | Contract A [Member]	'	'
Schedule of Receivables, net by Major Customer [Line Items]	'	'
Receivables-net	51,561	90,752
Percentage	10.50%	16.60%
Receivables [Member] | Contract B [Member]	'	'
Schedule of Receivables, net by Major Customer [Line Items]	'	'
Receivables-net	8,947	62,709
Percentage	1.80%	11.40%
Receivables [Member] | All Other Contracts [Member]	'	'
Schedule of Receivables, net by Major Customer [Line Items]	'	'
Receivables-net	$372,204	$384,110
Percentage	75.80%	70.00%

Equity_Method_Investments_Narr

Equity Method Investments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Equity in losses of unconsolidated subsidiaries	$750,000	$0	$750,000	$0
Fluor-ManTech Logistics Solutions, LLC [Member]	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Equity Method Investment, Ownership Percentage	50.00%	'	50.00%	'
Equity in losses of unconsolidated subsidiaries	'	'	$750,000	$0