Mantech International (MANT) 10-K21 Feb 142013 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information Document (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Feb. 19, 2014	Feb. 19, 2014
	Dec. 31, 2013	Jun. 30, 2013	Class A Common Stock [Member]	Class B Common Stock [Member]
Entity Information [Line Items]	'	'	'	'
Document Type	'10-K	'	'	'
Amendment Flag	'false	'	'	'
Document Period End Date	31-Dec-13	'	'	'
Document Fiscal Year Focus	'2013	'	'	'
Document Fiscal Period Focus	'FY	'	'	'
Trading Symbol	'MANT	'	'	'
Entity Registrant Name	'MANTECH INTERNATIONAL CORP	'	'	'
Entity Central Index Key	'0000892537	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'	'
Entity Voluntary Filers	'No	'	'	'
Entity Current Reporting Status	'Yes	'	'	'
Entity Filer Category	'Large Accelerated Filer	'	'	'
Entity Public Float	'	$623,683,461	'	'
Common Stock, Shares Outstanding	'	'	23,849,719	13,192,845

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS	'	'
Cash and cash equivalents	$269,001	$134,896
Receivables-net	457,898	548,309
Prepaid expenses and other	19,384	27,185
Contractual inventory	3,962	34,762
Total Current Assets	750,245	745,152
Goodwill	752,867	861,912
Other intangible assets-net	152,523	167,910
Property and equipment-net	30,156	28,588
Employee supplemental savings plan assets	31,765	27,352
Other assets	5,846	10,995
TOTAL ASSETS	1,723,402	1,841,909
LIABILITIES	'	'
Accounts payable and accrued expenses	226,287	315,582
Accrued salaries and related expenses	56,617	52,364
Billings in excess of revenue earned	13,781	15,031
Deferred income taxesbcurrent	0	4,266
Total Current Liabilities	296,685	387,243
Long-term debt	200,000	200,000
Deferred income taxes-non-current	48,093	50,645
Accrued retirement	33,565	29,390
Other long-term liabilities	11,288	9,403
TOTAL LIABILITIES	589,631	676,681
COMMITMENTS AND CONTINGENCIES	'	'
STOCKHOLDERS' EQUITY	'	'
Additional paid-in capital	423,787	417,917
Treasury stock	-9,158	-9,158
Retained earnings	718,892	756,241
Accumulated other comprehensive income (loss)	-124	-145
TOTAL STOCKHOLDERS' EQUITY	1,133,771	1,165,228
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,723,402	1,841,909
Class A Common Stock [Member]	'	'
STOCKHOLDERS' EQUITY	'	'
Common stock	242	241
TOTAL STOCKHOLDERS' EQUITY	242	241
Class B Common Stock [Member]	'	'
STOCKHOLDERS' EQUITY	'	'
Common stock	132	132
TOTAL STOCKHOLDERS' EQUITY	$132	$132

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet Parentheticals Consolidated Balance Sheet Parentheticals (USD $)	Dec. 31, 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	24,245,893	24,093,832
Common Stock, Shares Outstanding	24,001,780	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

Consolidated_Statements_of_Inc

Consolidated Statements of Income and Loss (USD $)	12 Months Ended
Consolidated Statements of Income and Loss (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues	$2,310,072,000	$2,582,295,000	$2,869,982,000
Cost of services	1,995,630,000	2,213,894,000	2,453,679,000
General and administrative expenses	173,772,000	197,413,000	188,949,000
Goodwill impairment	118,427,000	0	0
Operating income	22,243,000	170,988,000	227,354,000
Interest expense	-16,266,000	-16,304,000	-15,791,000
Interest income	608,000	344,000	332,000
Other income (expense), net	-32,000	-74,000	3,607,000
Income from operations before income taxes and equity method investments	6,553,000	154,954,000	215,502,000
Provision for income taxes	-11,842,000	-59,935,000	-82,196,000
Equity in losses of unconsolidated subsidiaries	-860,000	0	0
Net income (loss)	($6,149,000)	$95,019,000	$133,306,000
Class A Common Stock [Member]	'	'	'
BASIC EARNINGS (LOSS) PER SHARE:	'	'	'
Basic earnings (loss) per share	($0.17)	$2.57	$3.64
DILUTED EARNINGS (LOSS) PER SHARE:	'	'	'
Diluted earnings (loss) per share	($0.17)	$2.57	$3.63
Class B Common Stock [Member]	'	'	'
BASIC EARNINGS (LOSS) PER SHARE:	'	'	'
Basic earnings (loss) per share	($0.17)	$2.57	$3.64
DILUTED EARNINGS (LOSS) PER SHARE:	'	'	'
Diluted earnings (loss) per share	($0.17)	$2.57	$3.63

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income and Loss (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income (loss)	($6,149)	$95,019	$133,306
OTHER COMPREHENSIVE INCOME (LOSS):	'	'	'
Translation adjustments, net of tax	-15	134	-80
Actuarial gain (loss) on defined benefit pension plans, net of tax	36	32	-76
Total other comprehensive income (loss)	21	166	-156
Comprehensive Income (Loss)	($6,128)	$95,185	$133,150

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Class A Common Stock [Member]	Class B Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, unless otherwise specified	Total	Class A Common Stock [Member]	Class B Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
At beginning of year at Dec. 31, 2010	'	$234	$133	$385,407	($9,114)	$589,838	($155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Stock compensation expense	'	'	'	9,170	'	'	'
Stock options exercises	'	3	'	8,183	'	'	'
Conversion Class B to Class A common stock	'	1	'	'	'	'	'
Conversion Class B to Class A common stock	'	'	-1	'	'	'	'
Contribution of Class A common stock to Employee Stock Ownership Plan	'	1	'	3,559	'	'	'
Tax benefit (deficiency) from the exercise of stock options	'	'	'	-236	'	'	'
Treasury stock acquired	'	'	'	'	-44	'	'
Net income (loss)	133,306	'	'	'	'	133,306	'
Dividends	'	'	'	'	'	-30,872	'
Translation adjustments, net of tax	-80	'	'	'	'	'	-80
Actuarial gain (loss) on defined benefit pension plans, net of tax	'	'	'	'	'	'	-76
At end of year at Dec. 31, 2011	1,089,257	239	132	406,083	-9,158	692,272	-311
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Stock compensation expense	'	'	'	8,142	'	'	'
Stock options exercises	'	0	'	1,147	'	'	'
Conversion Class B to Class A common stock	'	0	'	'	'	'	'
Conversion Class B to Class A common stock	'	'	0	'	'	'	'
Contribution of Class A common stock to Employee Stock Ownership Plan	'	2	'	3,906	'	'	'
Tax benefit (deficiency) from the exercise of stock options	'	'	'	-1,361	'	'	'
Treasury stock acquired	'	'	'	'	0	'	'
Net income (loss)	95,019	'	'	'	'	95,019	'
Dividends	'	'	'	'	'	-31,050	'
Translation adjustments, net of tax	134	'	'	'	'	'	134
Actuarial gain (loss) on defined benefit pension plans, net of tax	'	'	'	'	'	'	32
At end of year at Dec. 31, 2012	1,165,228	241	132	417,917	-9,158	756,241	-145
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Stock compensation expense	'	'	'	5,236	'	'	'
Stock options exercises	'	1	'	1,766	'	'	'
Conversion Class B to Class A common stock	'	0	'	'	'	'	'
Conversion Class B to Class A common stock	'	'	0	'	'	'	'
Contribution of Class A common stock to Employee Stock Ownership Plan	'	0	'	1,200	'	'	'
Tax benefit (deficiency) from the exercise of stock options	'	'	'	-2,332	'	'	'
Treasury stock acquired	'	'	'	'	0	'	'
Net income (loss)	-6,149	'	'	'	'	-6,149	'
Dividends	'	'	'	'	'	-31,200	'
Translation adjustments, net of tax	-15	'	'	'	'	'	-15
Actuarial gain (loss) on defined benefit pension plans, net of tax	'	'	'	'	'	'	36
At end of year at Dec. 31, 2013	$1,133,771	$242	$132	$423,787	($9,158)	$718,892	($124)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income (loss)	($6,149)	$95,019	$133,306
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'
Goodwill impairment	118,427	0	0
Depreciation and amortization	30,504	52,742	55,189
Deferred income taxes	-10,915	17,539	-3,259
Stock-based compensation	5,236	8,142	9,170
Equity in losses of unconsolidated subsidiaries	860	0	0
Gain on sale of property and equipment	-402	0	0
Excess tax benefits from the exercise of stock options	-53	-46	-351
Gain on sale of investments	0	0	-3,745
Change in assets and liabilities-net of effects from acquired businesses:	'	'	'
Receivables-net	91,583	-1,081	6,131
Contractual inventory	30,800	-34,762	0
Prepaid expenses and other	9,334	-4,416	-5,179
Accounts payable and accrued expenses	-89,935	28,187	-1,907
Accrued salaries and related expenses	3,677	-22,053	5,261
Billings in excess of revenue earned	-1,291	-20,456	23,846
Accrued retirement	4,175	3,235	366
Other	2,428	4,208	2,527
Net cash flow from operating activities	188,279	126,258	221,355
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Acquisition of businesses-net of cash acquired	-11,382	-63,093	-109,043
Purchases of property and equipment	-11,087	-11,718	-54,460
Investment in capitalized software for internal use	-2,536	-3,182	-5,227
Investment in unconsolidated subsidiaries	-422	0	0
Proceeds from sale of property and equipment	402	0	0
Proceeds from sale of investment	239	185	3,255
Proceeds from disposition of a business	0	1,799	0
Net cash flow from investing activities	-24,786	-76,009	-165,475
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Dividends paid	-31,208	-31,029	-30,846
Proceeds from exercise of stock options	1,767	1,147	8,186
Excess tax benefits from the exercise of stock options	53	46	351
Debt issuance costs	0	0	-3,873
Treasury stock acquired	0	0	-44
Net cash flow from financing activities	-29,388	-29,836	-26,226
NET CHANGE IN CASH AND CASH EQUIVALENTS	134,105	20,413	29,654
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	134,896	114,483	84,829
CASH AND CASH EQUIVALENTS, END OF PERIOD	269,001	134,896	114,483
SUPPLEMENTAL CASH FLOW INFORMATION	'	'	'
Cash paid for interest	15,903	15,429	15,357
Noncash investing and financing activities:	'	'	'
Employee Stock Ownership Plan Contributions	$1,287	$3,868	$4,103

Description_of_the_Business_No

Description of the Business (Notes)	12 Months Ended
Description of the Business (Notes)	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of the Business [Text Block]	'
	Description of the Business

	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: cyber security; information technology (IT) modernization and sustainment; intelligence/counterintelligence solutions and support; systems engineering; healthcare analytics and IT; test and evaluation; command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) solutions and services; environmental, range and sustainability services; testing services; and global logistics support. 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 numerous locations internationally.

Summary_of_Significant_Account

Summary of Significant Accounting Policies (Notes)	12 Months Ended
Summary of Significant Accounting Policies (Notes)	Dec. 31, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	Summary of Significant Accounting Policies

	Principles of Consolidation-Our consolidated financial statements include the accounts of ManTech International Corporation, subsidiaries we control and variable interest entities that are required to be consolidated. All intercompany accounts and transactions have been eliminated. Investments in entities where we have significant influence, but not control, are accounted for using the equity method.

	Use of Accounting Estimates-We prepare our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, which require management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates involve judgments with respect to, among other things, various future economic factors that are difficult to predict and are beyond the control of the Company. Therefore, actual amounts could differ from these estimates.

	Revenue Recognition-We derive the majority of our revenues from cost-plus-fixed-fee, cost-plus-award-fee, firm-fixed-price or time-and-materials contracts. Revenues for cost-reimbursable contracts are recorded as reimbursable costs are incurred, including an estimated share of the applicable contractual fees earned. For performance-based fees under cost-reimbursable contracts, we recognize the relevant portion of the expected fee to be awarded by the customer at the time such fee can be reasonably estimated, based on factors such as our prior award experience and communications with the customer regarding performance, or upon approval by the customer. For time-and-materials contracts, revenues are recognized to the extent of billable rates times hours delivered plus materials and other reimbursable costs incurred. For long-term fixed-price production contracts, revenues are recognized at a rate per unit as the units are delivered or by other methods to measure services provided. Revenues from other long-term fixed-price contracts are recognized ratably over the contract period or by other appropriate methods to measure services provided. Contract costs are expensed as incurred except for certain limited long-term contracts noted below. For long-term contracts, specifically described in the scope section of ASC 605-35, we apply the percentage of completion method. Under the percentage of completion method, income is recognized at a consistent profit margin over the period of performance based on estimated profit margins at completion of the contract. This method of accounting requires estimating the total revenues and total contract cost at completion of the contract. During the performance of long-term contracts, these estimates are periodically reviewed and revisions are made as required using the cumulative catch-up method of accounting. The impact on revenues and contract profit as a result of these revisions is included in the periods in which the revisions are made. This method can result in the deferral of costs or the deferral of profit on these contracts. Because we assume the risk of performing a fixed-price contract at a set price, the failure to accurately estimate ultimate costs or to control costs during performance of the work could result, and in some instances has resulted, in reduced profits or losses for such contracts. Both the individual changes in contract estimates and aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting were not material to the consolidated statement of operations for all periods presented. Estimated losses on contracts at completion are recognized when identified. In certain circumstances, revenues are recognized when contract amendments have not been finalized.

	Cost of Services-Cost of services consists primarily of compensation expenses for program personnel, the fringe benefits associated with this compensation and other direct expenses incurred to complete programs, including cost of materials and subcontract efforts.

	Cash and Cash Equivalents-For the purpose of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and short-term investments with maturity dates of three months or less at the date of purchase. Due to the short maturity of cash equivalents, the carrying value on our consolidated balance sheets approximates fair value.

	Property and Equipment-Property and equipment are recorded at original cost. Upon sale or retirement, the costs and related accumulated depreciation or amortization are eliminated from the respective accounts and any resulting gain or loss is included in income. Maintenance and repairs are charged to expense as incurred.

	Depreciation and Amortization Method-Furniture and office equipment are depreciated using the straight-line method with estimated useful lives ranging from one to seven years. Leasehold improvements are amortized using the straight-line method over the term of the lease.

	Contractual Inventory-Inventory consists of finished goods purchased for a specific contract.

	Goodwill-Goodwill represents the excess of cost over the fair value of net tangible and identifiable intangible assets of acquired companies.

	Other Intangible Assets-Contract rights and other intangible assets are amortized primarily using the pattern of benefits method over periods ranging from one to twenty-five years.

	We accounted for the cost of computer software developed or obtained for internal use in accordance with ASC 350-985, Software. These capitalized software costs are included in other intangible assets, net.

	We account for software development costs related to software products for sale, lease or otherwise marketed in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed. For projects fully funded by us, development costs are capitalized from the point of demonstrated technological feasibility until the point in time that the product is available for general release to customers. Once the product is available for general release, capitalized costs are amortized based on units sold or on a straight-line basis over a five-year period or other such shorter period as may be required.

	Impairment of Long-Lived Assets-Whenever events or changes in circumstances indicate that the carrying amount of long-lived assets may not be fully recoverable, we evaluate the probability that future undiscounted net cash flows, without interest charges, will be less than the carrying amount of the assets. If any impairment were indicated as a result of this review, we would recognize a loss based on the amount by which the carrying amount exceeds the estimated fair value.

	We review goodwill at least annually for impairment, or whenever events or circumstances indicate that the carrying value of long-lived assets may not be fully recoverable. We have elected to perform our annual review during the second quarter of each calendar year. If any impairment was indicated as a result of a review, we would recognize a loss based on the amount by which the carrying amount exceeds the estimated fair value. As a result of interim analysis conducted in the fourth quarter of 2013, we recorded a non-cash goodwill impairment charge of $118.4 million for the period ending December 31, 2013. Furthermore, other intangible assets were tested for impairment in conjunction with the interim analysis and no impairment loss was identified.

	Employee Supplemental Savings Plan Assets-We maintain several non-qualified defined contribution supplemental retirement plans for certain key employees that are accounted for in accordance with ASC 710-10-05, Deferred Compensation - Rabbi Trusts, as the underlying assets are held in rabbi trusts with investments directed by the respective employee. A rabbi trust is a grantor trust generally set up to fund compensation for a select group of management and the assets of this trust are available to satisfy the claims of general creditors in the event of bankruptcy of the Company. The assets held by the rabbi trusts are recorded at cash surrender value in our consolidated financial statements as Employee Supplemental Savings Plan assets with a related liability to employees recorded as a deferred compensation liability in accrued retirement.

	Billings In Excess of Revenue Earned-We receive advances and milestone payments from customers that exceed the revenues earned to date. We classify such items as current liabilities.

	Stock-based Compensation-We account for stock-based compensation in accordance with ASC 718, Compensation - Stock Compensation. ASC 718 requires the use of a valuation model to calculate the fair value of stock-based awards. We have elected to use the Black-Scholes-Merton pricing model to determine fair value on the dates of grant. The fair value is included in operating expenses or capitalized, as appropriate, straight-line over the period in which service is provided in exchange for the award.

	Income Taxes-We account for income taxes in accordance with ASC 740, Income Taxes. Under this method, deferred income taxes are determined based on the estimated future tax effects of differences between the financial statement and tax bases of assets and liabilities given the provisions of enacted tax laws. Deferred income tax provisions and benefits are based on changes to the assets or liabilities from year-to-year. In providing for deferred taxes, we consider tax regulations of the jurisdictions in which we operate, estimates of future taxable income and available tax planning strategies. If tax regulations, operating results or the ability to implement tax-planning strategies vary, adjustments to the carrying value of deferred tax assets and liabilities may be required. Valuation allowances are recorded related to deferred tax assets based on the “more likely than not” criteria. We recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would “more likely than not” sustain the position following an audit. For tax positions meeting the “more likely than not” threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority.

	Foreign-Currency Translation-All assets and liabilities of foreign subsidiaries are translated into U.S. dollars at fiscal year-end exchange rates. Income and expense items are translated at average monthly exchange rates prevailing during the fiscal year. The resulting translation adjustments are recorded as a component of accumulated other comprehensive income (loss).

	Comprehensive Income (Loss)-Comprehensive income (loss) is presented in our consolidated statements of changes in stockholders' equity. Comprehensive income (loss) consists of net income (loss); translation adjustments, net of tax; and actuarial gain (loss) on defined benefit pension plan, net of tax.

	Fair Value of Financial Instruments-The carrying value of our cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair value because of the short-term nature of these amounts.

	Variable Interest Entities-We determine whether we have a controlling financial interest in a Variable Interest Entity (VIE). The reporting entity with a variable interest or interest that provides the reporting entity with a controlling financial interest in a VIE will have both (a) the power to direct the activities of a VIE that most significantly impact the VIE's economic performance and (b) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. We have one entity that has been consolidated as a VIE. The purpose of the entity is to perform on certain U.S. Navy contracts. The maximum amount of loss we are exposed to as of December 31, 2013 was not material to our consolidated financial statements.

	Equity Method Investments-Investments where we have the ability to exercise significant influence, but we do not control, are accounted for under the equity method of accounting and are included in other assets on our consolidated balance sheets. Significant influence typically exists if we have a 20% to 50% ownership interest in the investee. Under this method of accounting, our share of the net earnings or losses of the investee is included in equity in losses of unconsolidated subsidiaries on our consolidated statement of income and loss.

	Accounting Standards Updates

	In July 2013, Accounting Standard Update No. 2013-11, Income Taxes (Topic 740), was issued. This Update applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists at the reporting date. In accordance with this Update, an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. For example, an entity should not evaluate whether the deferred tax asset expires before the statute of limitations on the tax position or whether the deferred tax asset may be used prior to the unrecognized tax benefit being settled. The amendments in this Update do not require new recurring disclosures. The amendments in this Update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The adoption of Accounting Standard Update No. 2013-11 is not expected to have an impact on our results of operations, financial position or cash flows.

	In February 2013, Accounting Standard Update No. 2013-2, Other Comprehensive Income (Topic 220), was issued. The amendments in this Update apply to all entities that issue financial statements that are presented in conformity with U.S. GAAP and that report items of other comprehensive income. Public companies are required to comply with these amendments for all reporting periods presented, including interim periods. The amendments do not change the current requirements for reporting net income or other comprehensive income in financial statements. However, the amendments require an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. The adoption of Accounting Standard Update No. 2013-2 did not have an impact on our results of operations, financial position or cash flows.

Acquisitions_Notes

Acquisitions (Notes)	12 Months Ended
Acquisitions (Notes)	Dec. 31, 2013
Business Combinations [Abstract]	'
Acquisitions Disclosure [Text Block]	'
	Acquisitions

	ALTA Systems, Inc.-On January 8, 2013, we completed the acquisition of ALTA Systems, Inc. (ALTA). The result 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 of 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.

	Revenues were $6.2 million and net income was $0.1 million for the period from January 8, 2013 to December 31, 2013. For the year ended December 31, 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 consolidated statement of income and loss.

	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.

	Revenues were $3.2 million and net loss of $(3.2) million for the period from April 2, 2012 to December 31, 2012. For the year ended December 31, 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 consolidated statement of income and loss.

	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 intangibles 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 relationship 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 estimate 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.

	Revenues were $27.9 million and net income was $0.3 million for the period from January 6, 2012 to December 31, 2012. For the year ended December 31, 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 consolidated statement of income and loss.

	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.

	Worldwide Information Network Systems, Inc.-On November 15, 2011, we completed the acquisition of Worldwide Information Network Systems, Inc. (WINS). The results of WINS' operations have been included in our consolidated financial statements since that date. The acquisition was completed through a stock purchase agreement dated October 26, 2011, by and among a subsidiary of ManTech International Corporation, WINS and its sole shareholder. WINS provides IT solutions with network engineering and cyber security technical expertise to the Department of Defense, Department of State and other agencies. WINS' largest customer is the Defense Intelligence Agency (DIA) through its prime position on the Solutions for the Information Technology Enterprise (SITE) Indefinite Delivery/Indefinite Quantity contract vehicle. This acquisition broadened our footprint in the high-end defense and intelligence market. The addition of WINS' IT capabilities, its prime position on the DIA SITE contract, support of the Department of State and other contracts will enhance our positioning with important customers and further our growth prospects. ManTech funded the acquisition with cash on hand. The stock purchase agreement did not contain provisions for contingent consideration.

	Revenues were $8.5 million and net income was $0.7 million for the period from November 15, 2011 to December 31, 2011. The Company incurred in fiscal year 2011 approximately $0.6 million of acquisition costs related to the WINS transaction, which are included in general and administrative expense in our consolidated statement of income and loss for the year ended December 31, 2011.

	The purchase price of $90.4 million was allocated to the underlying assets and liabilities based on their fair values at the date of acquisition. Total assets were $100.5 million, including goodwill and intangible assets recognized in connection with the acquisition, and total liabilities were $10.1 million. Included in total assets were $18.7 million in acquired intangible assets. We recorded goodwill of $62.5 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 highly skilled employees and the value paid for WINS' capabilities in supporting high-end defense, intelligence and homeland security markets.

	In allocating the purchase price, we consider among other factors, analyses of historical financial performance and estimates of future performance of WINS' contracts. The components of other intangible assets associated with the acquisition were customer relationships and backlog valued at $18.0 million and $0.7 million, respectively. Customer contracts and related relationships represent the underlying relationships and agreements with WINS' 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 19.3 years.

	TranTech, Inc.-On February 11, 2011, we completed the acquisition of TranTech, Inc. (TranTech). The results of TranTech's operations have been included in our consolidated financial statements since that date. The acquisition was completed through a stock purchase agreement dated February 11, 2011, by and among ManTech International Corporation, TranTech and its sole shareholder. TranTech provides information technology, networking and cyber security services to the federal government. This acquisition allows us to continue extending our presence in the defense, security and intelligence communities, and to offer comprehensive solutions through a prime position on the Defense Information Systems Agency ENCORE II contract. ManTech funded the acquisition with cash on hand. The stock purchase agreement did not contain provisions for contingent consideration.

	Revenues were $12.5 million and net income was $0.9 million for the period from February 11, 2011 to December 31, 2011. The Company incurred in fiscal year 2011 approximately $0.3 million of acquisition costs related to the TranTech transaction, which are included in general and administrative expense in our consolidated statement of income and loss for the year ended December 31, 2011.

	The purchase price of $21.5 million was allocated to the underlying assets and liabilities based on their fair value at the date of acquisition. Total assets were $23.8 million, including goodwill and intangible assets recognized in connection with the acquisition, and total liabilities were $2.3 million. Included in total assets were $5.0 million in acquired intangible assets. We recorded goodwill of $14.6 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 TranTech's capabilities in supporting high-end defense, intelligence and homeland security markets.

	In allocating the purchase price, we consider among other factors, analyses of historical financial performance and estimates of future performance of TranTech's contracts. The components of other intangible assets associated with the acquisition were customer relationships and backlog valued at $4.6 million and $0.4 million, respectively. Customer contracts and related relationships represent the underlying relationships and agreements with TranTech'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 intangibles assets is 18.5 years.
	Pro Forma Financial Information-We calculated the following unaudited pro forma amounts as if our acquisitions had occurred on January 1, 2012. Our consolidated pro forma revenue would have been $2,310.2 million and $2,591.9 million and our consolidated pro forma net income (loss) would have been $(6.0) million and $95.7 million for the years ended December 31, 2013 and 2012, respectively.

Earnings_Loss_per_Share_Notes

Earnings (Loss) per Share (Notes)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings (Loss) Per Share [Text Block]	'
	Earnings (Loss) per Share

	Under ASC 260, Earnings per Share, the two-class method is an earnings (loss) allocation formula that determines earnings (loss) per share for each class of common stock according to dividends declared (or accumulated) and participation rights in undistributed earnings (loss). Under that method, basic and diluted earnings (loss) per share data are presented for each class of common stock.

	In applying the two-class method, we determined that undistributed earnings (loss) should be allocated equally on a per share basis between Class A and Class B common stock. Under our 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 the years ended December 31, 2013 and 2012, we declared and paid quarterly dividends, each in the amount of $0.21 per share on both classes of common stock. During December 31, 2011, we declared and paid semi-annual dividends, each in the amount of $0.42 per share on both classes of common stock.

	Basic earnings (loss) per share has been computed by dividing net income (loss) available to common stockholders by the weighted average number of shares of common stock 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 (loss) per share has been computed in a manner consistent with that of basic earnings (loss) per share while giving effect to all potentially dilutive common shares that were outstanding during each period.

	The net income (loss) available to common stockholders and weighted average number of common shares outstanding used to compute basic and diluted earnings (loss) per share for each class of common stock are as follows (in thousands, except per share amounts):



		Year Ended
		December 31,
		2013			2012		2011
	Distributed earnings	$	31,200		$	31,050	$	30,872

	Undistributed earnings (loss)	(37,349		)	63,969		102,434

	Net income (loss)	$	(6,149	)	$	95,019	$	133,306


	Class A common stock:
	Basic net income (loss) available to common stockholders	$	(3,963	)	$	61,065	$	85,172

	Basic weighted average common shares outstanding	23,913			23,727		23,415

	Basic earnings (loss) per share	$	(0.17	)	$	2.57	$	3.64


	Diluted net income (loss) available to common stockholders	$	(3,963	)	$	61,103	$	85,323

	Effect of potential exercise of stock options	—			41		115

	Diluted weighted average common shares outstanding	23,913			23,768		23,530

	Diluted earnings (loss) per share	$	(0.17	)	$	2.57	$	3.63


	Class B common stock:
	Basic net income (loss) available to common stockholders	$	(2,186	)	$	33,954	$	48,134

	Basic weighted average common shares outstanding	13,193			13,193		13,233

	Basic earnings (loss) per share	$	(0.17	)	$	2.57	$	3.64


	Diluted net income (loss) available to common stockholders	$	(2,186	)	$	33,916	$	47,983

	Effect of potential exercise of stock options	—			—		—

	Diluted weighted average common shares outstanding	13,193			13,193		13,233

	Diluted earnings (loss) per share	$	(0.17	)	$	2.57	$	3.63


	For the years ended December 31, 2013, 2012 and 2011, options to purchase 3.2 million, 2.9 million and 2.2 million shares, respectively, were outstanding but not included in the computation of diluted earnings (loss) per share because the options' effect would have been anti-dilutive. For the years ended December 31, 2013, 2012 and 2011, there were 79,567 shares, 38,542 shares, and 271,165 shares, respectively, issued from the exercise of stock options.

Receivables_Notes

Receivables (Notes)	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]	'
Receivables [Text Block]	'
	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):



		December 31,
		2013			2012
	Billed receivables	$	370,975		$	420,598

	Unbilled receivables:
	Amounts billable	84,582			119,893

	Revenues recorded in excess of funding	9,743			11,148

	Retainage	2,634			6,119

	Allowance for doubtful accounts	(10,036		)	(9,449		)
	Receivables-net	$	457,898		$	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 the contract performance and approval of final indirect expense rates by the government. There is a contract with the U.S. Army that represents 15.3% of receivables-net at December 31, 2013 and multiple contracts with the U.S. Army that represent 28.0% of receivables-net at December 31, 2012. Accounts receivable at December 31, 2013 are expected to be substantially collected within one year except for approximately $1.5 million, of which 91.2% is related to receivables from 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 our estimate for exposure to compliance, contractual issues and bad debts related to prime contractors.

Property_and_Equipment_Notes

Property and Equipment (Notes)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property And Equipment [Text Block]	'
	Property and Equipment

	Major classes of property and equipment are summarized as follows (in thousands):



		December 31,
		2013			2012
	Furniture and equipment	$	50,989		$	94,934

	Leasehold improvements	33,535			28,932

		84,524			123,866

	Accumulated depreciation and amortization	(54,368		)	(95,278		)
	Total property and equipment, net	$	30,156		$	28,588


	Depreciation and amortization expense related to property and equipment for the years ended December 31, 2013, 2012 and 2011 was $8.7 million, $30.9 million and $33.7 million, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets (Notes)	12 Months Ended
Goodwill and Other Intangible Assets (Notes)	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets Disclosure [Text Block]	'
	Goodwill and Other Intangible Assets

	Under ASC 350, Intangibles - Goodwill and Other, goodwill is to be reviewed at least annually for impairment and whenever events or circumstances indicate that the carrying value of goodwill may not be fully recoverable. We have elected to perform this review during the second quarter of each calendar year. The goodwill impairment test is a two-step process performed at the reporting unit level. The first step of the goodwill impairment test compares the fair value of a reporting unit with its carrying amount (including goodwill). If the reporting unit's fair value exceeds its carrying value, no further procedures are required. However, if the reporting unit's fair value is less than its carrying value, an impairment of goodwill may exist, requiring a second step to be performed. Step two of this test measures the amount of the impairment loss, if any. Step two of this test requires the allocation of the reporting unit's fair value to its assets and liabilities, including any unrecognized intangible assets, in a hypothetical analysis that calculates the implied fair value of goodwill as if the reporting unit were being acquired in a business combination. If the implied fair value of goodwill is less than the carrying value, the difference is recorded as a goodwill impairment charge in operations.

	The fair values of the reporting units are determined based on a weighting of the income approach, market approach and market transaction approach. The income approach is a valuation technique in which fair value is based from forecasted future cash flow discounted at the appropriate rate of return commensurate with the risk as well as current rates of return for equity and debt capital as of the valuation date. The forecast used in our estimation of fair value was developed by management based on a contract basis, incorporating adjustments to reflect known contract and market considerations (such as reductions and uncertainty in government spending, pricing pressure and opportunities). The discount rate utilizes a risk adjusted weighted average cost of capital. The market approach is a valuation technique in which the fair value is calculated based on market prices realized in an actual arm's length transaction. The technique consists of undertaking a detailed market analysis of publicly traded companies that provides a reasonable basis for comparison to the company. Valuation ratios, which relate market prices to selected financial statistics derived from comparable companies, are selected and applied to the company after consideration of adjustments for financial position, growth, market, profitability and other factors. The market transaction approach is a valuation technique in which the fair value is calculated based on market prices realized in actual arm's length transactions. The technique consists of undertaking a detailed market analysis of merged and acquired companies that provided a reasonable basis for comparison to the company. Valuation ratios, which relate market prices to selected financial statistics derived from comparable companies, are selected and applied to the company after consideration of adjustments for financial position, growth, market, profitability and other factors. To assess the reasonableness of the calculated reporting unit fair values, we compare the sum of the reporting units' fair values to the Company's market capitalization (per share stock price times the number of shares outstanding) and calculate an implied control premium (the excess of the sum of the reporting units' fair values over the market capitalization) and then assess the reasonableness of our implied control premium.

	During the second quarter, we completed our annual goodwill impairment test. The results of step one of this test showed the fair value of all reporting units were substantially in excess of their carrying value, therefore, no impairment loss was identified and performance of step two was not required.

	During the fourth quarter of 2013, multiple events and circumstances indicated a significant reduction in the operating performance outlook of one of our reporting units. These events included lower than expected contract awards on several competitive opportunities, changing mission priorities of the U.S. government in relation to our Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance (C4ISR) contracts and Overseas Contingency Operations (OCO)-related work (primarily on maintenance and sustainment of Mine-Resistant Ambush-Protected (MRAP) vehicles, delays in our customers' procurement cycle due, in part, to the U.S. government shutdown, and continued margin pressures on some of our contracts. The culmination of these events led us to conduct an interim goodwill impairment test. The results of step one of this test showed the carrying value of one reporting unit was in excess of its fair value, therefore we performed step two of the goodwill impairment test to measure the amount of the impairment loss. Based on the results of the step two analysis, we recorded a non-cash goodwill impairment charge of $118.4 million for the period ending December 31, 2013.

	The changes in the carrying amounts of goodwill during fiscal years 2013 and 2012 were as follows (in thousands):



		Goodwill Balance
	31-Dec-11	$	808,455
	31-Dec-11	$	808,455
	Acquisitions	53,245
	Acquisitions	53,245
	Additional consideration	212
	Additional consideration	212
	31-Dec-12	861,912
	31-Dec-12	861,912
	Impairment	(118,427		)
	Acquisitions	9,382
	Acquisitions	9,382
	31-Dec-13	$	752,867
	31-Dec-13	$	752,867

	Other intangible assets consisted of the following (in thousands):



		December 31, 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		$	109,586	$	141,986	$	249,882	$	92,400	$	157,482
	Contract and program intangible assets	$	251,572		$	109,586	$	141,986	$	249,882	$	92,400	$	157,482
	Capitalized software cost for internal use	34,083			23,617		10,466		30,985		20,637		10,348
	Capitalized software cost for internal use	34,083			23,617		10,466		30,985		20,637		10,348
	Other	115			44		71		115		35		80
	Other	115			44		71		115		35		80
	Total other intangible assets, net	$	285,770		$	133,247	$	152,523	$	280,982	$	113,072	$	167,910
	Total other intangible assets, net	$	285,770		$	133,247	$	152,523	$	280,982	$	113,072	$	167,910

	Amortization expense relating to intangible assets for the years ended December 31, 2013, 2012 and 2011 was $20.4 million, $20.5 million and $20.4 million, respectively. We estimate that we will have the following amortization expense for the future periods indicated below (in thousands):



	Year ending:
	December 31, 2014	$	18,304
	December 31, 2014	$	18,304
	December 31, 2015	$	15,695
	December 31, 2015	$	15,695
	December 31, 2016	$	13,694
	December 31, 2016	$	13,694
	December 31, 2017	$	11,977
	December 31, 2017	$	11,977
	December 31, 2018	$	10,786
	December 31, 2018	$	10,786

LongTerm_Debt_Notes

Long-Term Debt (Notes)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure [Text Block]	'
	Long-term Debt

	Long-term debt consisted of the following (in thousands):



		December 31,
		2013		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 our 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 spreads (1.25% to 2.25% based on our consolidated total leverage ratio) or Bank of America's base rate plus market spreads (0.25% to 1.25% based on our consolidated total leverage ratio). The aggregate annual weighted average interest rates were 0.00% and 0.05% for the years ended December 31, 2013 and 2012, respectively.

	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 a certain consolidated 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 additional actions. As of, and during, December 31, 2013 and 2012, we were in compliance with our financial covenants under the credit agreement.

	There was no outstanding balance on our revolving credit facility at December 31, 2013 and 2012. The weighted average borrowings under the revolving portion of the facility during the years ended December 31, 2013 and 2012 were $0 and $38 thousand, respectively. The maximum available borrowing under the revolving credit facility at December 31, 2013 was $499.8 million. At December 31, 2013 and 2012, we were contingently liable under letters of credit totaling $0.2 million and $0.2 million, respectively, which reduces our availability to borrow under our revolving credit facility.

	The following table summarizes the activity under our revolving credit facility for the years ended December 31, 2013, 2012 and 2011 (in thousands):



		Year Ended
		December 31,
		2013		2012			2011
	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 December 31, 2013 was approximately $210.0 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 our 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. We have determined that we will redeem these notes in accordance with their terms in April 2014. 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 guarantees debt obligations under our prior revolving credit facility or will guarantee 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 December 31, 2013 and 2012, the Company was in compliance with all required covenants under the indenture.

Commitments_and_Contingencies_

Commitments and Contingencies (Notes)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	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 our 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 our U.S. government contracts or conducted for other reasons, could result in administrative, civil or criminal liabilities, including repayments, fines or penalties being imposed upon the Company, or could lead to suspension or debarment from future U.S. government contracting. 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 2005, with no material adjustments. The remaining audits for 2006 through 2013 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.

	We lease office space and equipment under long-term operating leases. A number of the leases contain renewal options and escalation clauses. At December 31, 2013, aggregate future minimum rental commitments under these leases are as follows (in thousands):



		Office Space		Equipment		Total
	Year ending:
	December 31, 2014	$	30,403	$	641	$	31,044

	December 31, 2015	24,801		54		24,855

	December 31, 2016	21,555		—		21,555

	December 31, 2017	19,127		—		19,127

	December 31, 2018	19,321		—		19,321

	Thereafter	72,887		—		72,887

	Total	$	188,094	$	695	$	188,789


	Office space and equipment rent expense totaled approximately $47.6 million, $52.1 million and $55.2 million for the years ended December 31, 2013, 2012 and 2011, respectively.

	We had $11.0 million and $9.3 million of deferred rent liabilities resulting from recording rent expense on a straight-line basis over the life of the respective lease for the years ended December 31, 2013 and 2012, respectively.

Stockholders_Equity_and_StockB

Stockholders Equity and Stock-Based Compensation (Notes)	12 Months Ended
	Dec. 31, 2013
Stockholders Equity and Stock-Based Compensation [Abstract]	'
Stockholders Equity and Stock-Based Compensation [Text Block]	'
	Stockholders' Equity and Stock-Based Compensation

	Common Stock-We have 150,000,000 shares of authorized Class A common stock, par value $0.01 per share. We have 50,000,000 shares of authorized Class B common stock, par value $0.01 per share. On December 31, 2013, there were 24,001,780 shares of Class A common stock outstanding, 244,113 shares of Class A common stock recorded as treasury stock and 13,192,845 shares of Class B common stock outstanding.

	Holders of Class A common stock are entitled to one vote for each share held of record and holders of Class B common stock are entitled to ten votes for each share held of record, except with respect to any “going private transaction” (generally, a transaction in which George J. Pedersen (our Chairman of the Board and CEO), his affiliates, his direct and indirect permitted transferees or a group, generally including Mr. Pedersen, such affiliates and permitted transferees, seek to buy all outstanding shares), as to which each share of Class A common stock and Class B common stock are entitled to one vote per share. The Class A common stock and the Class B common stock vote together as a single class on all matters submitted to a vote of stockholders, including the election of directors, except as required by law. Holders of common stock do not have cumulative voting rights in the election of directors.

	Stockholders are entitled to receive, when and if declared by the Board of Directors from time-to-time, such dividends and other distributions in cash, stock or property from our assets or funds legally and contractually available for such purposes subject to any dividend preferences that may be attributable to preferred stock that may be authorized. Each share of Class A common stock and Class B common stock is equal in respect of dividends and other distributions in cash, stock or property, except that in the case of stock dividends, only shares of Class A common stock will be distributed with respect to the Class A common stock and only shares of Class B common stock will be distributed with respect to Class B common stock. In no event will either Class A common stock or Class B common stock be split, divided or combined unless the other class is proportionately split, divided or combined.

	The shares of Class A common stock are not convertible into any other series or class of securities. Each share of Class B common stock, however, is freely convertible into one share of Class A common stock at the option of the Class B stockholder. Upon the death or permanent mental incapacity of Mr. Pedersen, all outstanding shares of Class B common stock automatically convert to Class A common stock.

	Preferred Stock-We are authorized to issue an aggregate of 20,000,000 shares of preferred stock, $0.01 par value per share, the terms and conditions of which are determined by our Board of Directors upon issuance. The rights, preferences and privileges of holders of our common stock are subject to, and may be adversely affected by, the rights of holders of any shares of preferred stock that we may designate and issue in the future. At December 31, 2013 and 2012, no shares of preferred stock were outstanding and the Board of Directors currently has no plans to issue a series of preferred stock.

	Accounting for 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, 2014, there were 557,894 additional shares made available for issuance under the Plan. Through December 31, 2013, the remaining aggregate number of shares of our common stock authorized for issuance under the Plan was 3,521,356. Through December 31, 2013, there were 4,616,309 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 years ended December 31, 2013, 2012 and 2011, we recorded $5.2 million, $8.1 million and $9.2 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 years ended December 31, 2013, 2012 and 2011, the total recognized tax deficiency from the exercise of stock options, vested cancellations and the vesting of restricted stock were $2.3 million, $1.4 million and $0.2 million, respectively.

	Stock Options-We typically issue options that vest over three years in equal 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 years ended December 31, 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 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 years ended December 31, 2013, 2012 and 2011:

	Volatility-The expected volatility of the options granted was estimated based upon historical volatility of our share price through weekly observations of our trading history.

	Expected Term-The expected term of options granted to employees during fiscal years 2013, 2012 and 2011 was determined from historical exercises of the grantee population. For all grants valued during fiscal years 2013, 2012 and 2011, the options have graded vesting over three years in equal installments beginning on the first anniversary of the date of the 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 a numeric model to provide the equivalent risk-free rate to be used in the Black-Scholes-Merton model based on 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 years ended December 31, 2013, 2012 and 2011:



		Year Ended
		December 31,
		2013			2012			2011
	Volatility	31.92	%		31.68	%		35.08	%
	Expected life of options	3 years			3 years			3 years

	Risk-free interest rate	0.56	%		0.48	%		0.81	%
	Dividend yield	3	%		2.7	%		0.7	%

	Stock Option Activity-During the year ended December 31, 2013, we granted stock options to purchase 957,525 shares of Class A common stock at a weighted-average exercise price of $27.42 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 years ended December 31, 2013, 2012 and 2011, as determined under the Black-Scholes-Merton valuation model, was $4.84, $5.19 and $9.14, 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 years ended December 31, 2013, 2012 and 2011 had a combined fair value of $6.1 million, $8.3 million and $7.8 million, respectively.

	The following table summarizes stock option activity for the years ended December 31, 2013, 2012 and 2011:



		Number of Shares			Weighted Average Exercise Price				Aggregate Intrinsic Value
									(in thousands)
	Stock options at December 31, 2010	2,473,257			$	42.22			$	7,731

	Granted	986,000			$	38.56

	Exercised	(271,165	)		$	27.94			$	3,087

	Cancelled and expired	(301,982	)		$	45.07

Stock options at December 31, 2011	2,886,110			$	41.14			$	1,096

Granted	986,650			$	29.24

Exercised	(38,542	)		$	28.93			$	215

Cancelled and expired	(413,022	)		$	39.27

Stock options at December 31, 2012	3,421,196			$	38.61			$	626

Granted	957,525			$	27.42

Exercised	(79,567	)		$	22.75			$	400

Cancelled and expired	(899,034	)		$	39.84

Stock options at December 31, 2013	3,400,120			$	35.51			$	4,488


The following table summarizes non-vested stock options for the year ended December 31, 2013:



	Number of Shares			Weighted Average Fair Value
Non-vested stock options at December 31, 2012	1,697,992			$	7.37

Granted	957,525			$	4.84

Vested	(704,599	)		$	8.6

Cancelled	(382,973	)		$	6.4

Non-vested stock options at December 31, 2013	1,567,945			$	5.51


The following table includes information concerning stock options exercisable and stock options expected to vest at December 31, 2013:



	Number of Shares			Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Aggregate Intrinsic Value
				(years)						(in thousands)
Stock options exercisable	1,832,175			1.7		$	40.72			$	1,168

Stock options expected to vest	1,002,286			3.6		$	30.24			$	2,098

Stock options exercisable and expected to vest	2,834,461


Unrecognized compensation expense related to outstanding stock options expected to vest as of December 31, 2013 was $5.5 million, which is expected to be recognized over a weighted-average period of 1.6 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 granted to employees vest over three years in equal installments beginning on the first anniversary of the grant date, contingent upon employment with the Company on the vesting dates. Restricted shares granted to 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 during the years ended December 31, 2012 and 2013:



	Number of Shares			Grant Date
				Fair Value
				(in thousands)
Non-vested restricted stock at December 31, 2011	30,667

Granted	24,000			$	576

Vested	(27,334	)		$	1,237

Forfeited	—

Non-vested restricted stock at December 31, 2012	27,333

Granted	24,000			$	664

Vested	(30,333	)		$	825

Forfeited	—

Non-vested restricted stock at December 31, 2013	21,000

Retirement_Plans_Notes

Retirement Plans (Notes)	12 Months Ended
Retirement Plans (Notes)	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Retirement Plans [Text Block]	'
	Retirement Plans

	As of December 31, 2013, we maintained a qualified defined contribution plan. Our qualified defined contribution plan covers substantially all employees and complies with Section 401 of the Internal Revenue Code. Under this plan, we stipulated a basic matching contribution that matches a portion of the participants' contribution based upon a defined schedule. Additionally, this plan contains a discretionary contribution component where the Company may contribute additional amounts based on a percentage of eligible employees' compensation. Contributions are invested by an independent investment company. The choice of investment alternatives is at the election of each participating employee. Our contributions to the plan were approximately $19.3 million, $22.6 million and $23.8 million for the years ended December 31, 2013, 2012 and 2011, respectively.

	We maintained an Employee Stock Ownership Plan (ESOP) as of December 31, 2013. On December 18, 1998, the Board of Directors approved the establishment of a qualified ESOP, effective January 1, 1999, for the benefit of substantially all of our U.S. domestic-based employees and some overseas employees. The ESOP is non-leveraged and is funded entirely through Company contributions based on a percentage of eligible employee compensation, as defined in the plan. Participants must be employees of the Company or eligible Company subsidiaries and must meet minimum service requirements to be eligible for annual contributions. The ESOP specifies a five-year vesting schedule over which participants become vested in the Class A common stock allocated to their participant account. The amount of our annual contribution to the ESOP is at the discretion of our Board of Directors. For the years ended December 31, 2013, 2012 and 2011, we recorded $0.9 million, $3.8 million and $3.6 million, respectively, as compensation expense related to ESOP contributions. There were 31,653 shares, 146,589 shares and 116,087 shares of Class A common stock contributed to the ESOP for the years ended December 31, 2013, 2012 and 2011, respectively. There were no unearned ESOP shares at December 31, 2013 and 2012, respectively. As required under ASC 714-40, Employee Stock Ownership Plans, compensation expense is recorded for shares committed to be released to employees based on the fair market value of those shares in the period in which they are committed to be released. For the years ended December 31, 2013, 2012 and 2011, new shares were issued to satisfy this obligation.

	As of December 31, 2013, we also maintained an Employee Supplemental Savings Plan (ESSP), a non-qualified deferred compensation plan, for certain key employees. Under this plan, eligible employees may defer up to 75% of qualified annual base compensation and 100% of bonus. In the ESSP, participant deferral accounts are credited with a rate of return based on investment elections as selected by the participant. The assets related to the ESSP are held in a rabbi trust owned by the Company for benefit of the participating employees. The trust investments are in the form of variable universal life insurance products, which are owned by the Company. These investments seek to replicate the return of the participant investment elections. Employee contributions to this plan were approximately $3.2 million, $5.1 million and $4.5 million for the years ended December 31, 2013, 2012 and 2011, respectively.

	We maintained a nonqualified supplemental defined benefit pension plan for certain retired employees of an acquired company as of December 31, 2013. These plans were informally and partially funded beginning in 1999 through a rabbi trust. Assets held in a rabbi trust are not eligible to be included in the calculation of plan status. At both December 31, 2013 and 2012, 100% of the rabbi trust assets were invested in a money market account with a commercial bank. All covered employees retired prior to 1998. Our benefit obligation at December 31, 2013 and 2012 was $1.3 million and $1.4 million, respectively.

Income_Taxes_Notes

Income Taxes (Notes)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	Income Taxes

	The domestic and foreign components of income operations before income taxes and equity method investments were as follows (in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	Domestic	$	6,768			$	155,381			$	215,437

	Foreign	(215		)		(427		)		65

	Income from operations before income taxes and equity method investments	$	6,553			$	154,954			$	215,502


	The provision for income taxes was comprised of the following components (in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	Current provision (benefit):
	Federal	$	18,702			$	37,926			$	75,505

	State	4,011				5,780				10,601

	Foreign	86				123				293

		22,799				43,829				86,399

	Deferred provision (benefit):
	Federal	(6,557		)		15,241				(3,209		)

	State	(1,858		)		2,332				(97		)

		(8,415		)		17,573				(3,306		)

	Non-current provision (benefit) resulting from allocating tax benefits directly to additional paid in capital and changes in liabilities:
	Federal	(2,009		)		(1,306		)		(787		)
	State	(522		)		(161		)		(116		)
	Foreign	(11		)		—				6

		(2,542		)		(1,467		)		(897		)
	Provision for income taxes	$	11,842			$	59,935			$	82,196


	For the year ended December 31, 2013, the non-current benefit for income taxes includes $(2.4) million arising from the cancellation of vested stock options allocated to equity and valuation differences between grant and vesting dates on restricted stock allocated to equity and $(0.1) million related to liabilities for uncertain tax positions. For the year ended December 31, 2012, the non-current benefit for income taxes includes $(1.4) million arising from the cancellation of vested stock options allocated to equity and valuation differences between grant and vesting dates on restricted stock allocation to equity and $(0.1) million related to liabilities for uncertain tax positions (including $(0.1) million for use of a state net operating loss). For the year ended December 31, 2011, the non-current benefit for income taxes includes $0.2 million for amounts arising from the exercise of stock options allocated as equity; $(0.4) million arising from the cancellation of vested stock options allocated to equity and valuation differences between grant and vesting dates on restricted stock allocated to equity; and $(0.7) million related to liabilities for uncertain tax positions (including $(0.2) million for use of a state net operating loss).

	The schedule of effective income tax rate reconciliation is as follows:



		Year Ended
		December 31,
		2013			2012			2011
	Statutory U.S. Federal tax rate	35	%		35	%		35	%
	Increase (decrease) in tax rate resulting from:
	Goodwill impairment	200.1	%		—	%		—	%
	Deferred compensation (ESSP)	(24.6	)%		(0.5	)%		0.2	%
	State taxes—net of Federal benefit	18.6	%		3.3	%		3.1	%
	Excess executive compensation	16.7	%		0.8	%		0.3	%
Tax basis deduction of investment	(15.3	)%		—	%		—	%
Provisions of American Taxpayer Relief Act of 2012	(10.3	)%		—	%		—	%
Section 199 deductions	(6.5	)%		(0.2	)%		(0.1	)%
Acquisition working capital settlement	(5.0	)%		—	%		—	%
Other, net	(0.7	)%		0.3	%		(0.4	)%
Effective tax rate	208	%		38.7	%		38.1	%

The Company paid income taxes, net of refunds, of $14.9 million, $43.5 million and $92.9 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. A summary of the tax effect of the significant components of deferred income taxes is as follows (in thousands):



	December 31,
	2013				2012
Gross deferred tax liabilities:
Goodwill and other assets	$	68,940			$	87,713

Unbilled receivables	10,099				14,921

Property and equipment	5,442				—

Total	84,481				102,634


Gross deferred tax assets:
Retirement and other liabilities	(33,505		)		(32,110		)
Allowance for potential contract losses and other contract reserves	(3,687		)		(3,402		)
Federal and state operating loss carryforwards	(829		)		(3,306		)
Property and equipment	—				(8,905		)

Total	(38,021		)		(47,723		)
Net deferred tax liabilities	$	46,460			$	54,911


The tax benefits associated with nonqualified stock options and disqualifying dispositions of incentive stock options reduced the current taxes payable by $0.1 million for the year ended December 31, 2013. These benefits were recorded as an increase to additional paid-in capital.

At December 31, 2013, we had state net operating losses of approximately $0.3 million that expire beginning 2016 through 2032; and federal net operating losses of $1.6 million that expire in 2031 and 2032.

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows (in thousands):



	December 31,
	2013				2012				2011
Gross unrecognized tax benefits at beginning of year	$	1,376			$	1,440			$	2,519

Increases in tax positions for prior years	95				18				87

Decreases in tax positions for prior years	(26		)		—				(71		)

Increases in tax positions for current year	69				141				269

Lapse in statute of limitations	(307		)		(223		)		(961		)
Settlements	—				—				(508		)

Increase in tax positions resulting from acquisitions	—				—				105

Gross unrecognized tax benefits at end of year	$	1,207			$	1,376			$	1,440


The total liability for gross unrecognized tax benefits as of December 31, 2013, 2012 and 2011 includes $0.9 million, $1.0 million and $1.1 million, respectively, of unrecognized net tax benefits which, if ultimately recognized, would reduce our annual effective tax rate in a future period.

The Company is subject to income taxes in the U.S., various state and foreign jurisdictions. Tax statutes and regulations within each jurisdiction are subject to interpretation and require significant judgment to apply. The Company is no longer subject to U.S., state or non-U.S. income tax examinations by tax authorities for the years before 2009. The Company believes it is reasonably possible that $0.6 million of gross unrecognized tax benefits will be settled within the next year due to expirations of statute of limitations.

The Company recognizes interest related to unrecognized tax benefits within interest expense and penalties related to unrecognized tax benefits in general and administrative expenses. At December 31, 2013, 2012 and 2011, interest and penalties on the net unrecognized tax benefits were $0.2 million, $0.2 million and $0.2 million, respectively.

Business_Segment_and_Geographi

Business Segment and Geographic Area Information (Notes)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Business Segment And Geographic Area Information [Text Block]	'
	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. 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. The U.S. Army Tank-Automotive Armament Command (TACOM) contract accounted for 19.4%, 22.2% and 17.0% of our revenues and 12.8%, 19.3% and 17.3% of our operating income (excluding the goodwill impairment) for the years ended December 31, 2013, 2012 and 2011. Revenues from the U.S. government under prime contracts and subcontracts were approximately 99.0%, 99.2% and 99.2% of our total revenues for the years ended December 31, 2013, 2012 and 2011, 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 assets from continuing operations were held in the United States for the years ended December 31, 2013, 2012 and 2011.

	Disclosure items required under ASC 280, Segment Reporting, including goodwill impairment, interest income, interest expense, depreciation and amortization expense, costs 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.

	Revenues by geographic customer and the related percentages of total revenues for the years ended December 31, 2013, 2012 and 2011, were as follows (dollars in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	United States	$	2,305,325	99.8	%	$	2,577,495	99.8	%	$	2,861,038	99.7	%

	International	4,747		0.2	%	4,800		0.2	%	8,944		0.3	%

	Total	$	2,310,072			$	2,582,295			$	2,869,982

Equity_Method_Investments_Note

Equity Method Investments (Notes)	12 Months Ended
Equity Method Investments (Notes)	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Equity Method Investments [Text Block]	'
	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. FMLS had no assets at December 31, 2013 and 2012. FMLS liabilities were $1.7 million and $0 at December 31, 2013 and 2012, respectively. FMLS had no revenues for the years ended December 31, 2013 and 2012. FMLS net loss was $(1.7) million and no net loss for the years ended December 31, 2013 and 2012, respectively. We recorded $(0.9) million and $0 in equity method losses for the years ended December 31, 2013 and 2012, respectively.

Sale_of_Investment_Notes

Sale of Investment (Notes)	12 Months Ended
Sale of Investment (Notes)	Dec. 31, 2013
Sale of Investment [Abstract]	'
Sale of Investment [Text Block]	'
	Sale of Investment

	ManTech received $3.3 million, $0.2 million and $0.2 million in proceeds during the years ended December 31, 2011, 2012 and 2013, respectively, for the sale of our investment of less than 5% in NetWitness Corporation (NetWitness). At December 31, 2013, there was $0.1 million held in escrow, which we expect to collect next year. The transaction was consummated on April 1, 2011 pursuant to an agreement and plan of merger dated March 12, 2011 by and among EMC Corporation, NetWitness and certain persons acting as the representative for the shareholders of NetWitness. The sale of our investment resulted in a pre-tax gain of $3.7 million, which was recorded in other income in our consolidated statement of income and loss for the year ended December 31, 2011.

Quarterly_Financial_Informatio

Quarterly Financial Information (Unaudited) (Notes)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Financial Information [Text Block]	'
	Quarterly Financial Information (Unaudited)

	The quarterly financial data reflects, in the opinion of the Company, all normal and recurring adjustments to present fairly the results of operations for such periods. Results of any one or more quarters are not necessarily indicative of annual results or continuing trends. The following tables set forth selected unaudited quarterly financial data (the quarter ending December 31, 2013 contains a goodwill impairment charge of $118.4 million):



		2013
		March 31,			June 30,			September 30,			December 31,
		(in thousands, except per share data)
	Revenues	$	646,008		$	605,129		$	567,399		$	491,536

	Operating income (loss)	$	36,371		$	38,671		$	32,039		$	(84,838	)

	Income (loss) from operations before income taxes and equity method investments	$	32,479		$	34,632		$	28,082		$	(88,640	)

	Net income (loss)	$	20,180		$	21,551		$	17,718		$	(65,598	)


	Class A common stock:
	Basic weighted average common shares outstanding	23,832			23,910			23,944			23,963

	Basic earnings (loss) per share	$	0.55		$	0.58		$	0.48		$	(1.77	)

	Diluted weighted average common shares outstanding	23,876			23,940			23,982			23,963

	Diluted earnings (loss) per share	$	0.54		$	0.58		$	0.48		$	(1.77	)

	Class B common stock:
	Basic weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Basic earnings (loss) per share	$	0.55		$	0.58		$	0.48		$	(1.77	)

	Diluted weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Diluted earnings (loss) per share	$	0.54		$	0.58		$	0.48		$	(1.77	)


		2012
		March 31,			June 30,			September 30,			December 31,
		(in thousands, except per share data)
	Revenues	$	676,509		$	638,937		$	645,028		$	621,821

	Operating income	$	45,695		$	44,880		$	42,759		$	37,654

	Income from operations before income taxes	$	41,634		$	40,835		$	38,777		$	33,708

	Net income	$	25,642		$	24,745		$	24,427		$	20,205


	Class A common stock:
	Basic weighted average common shares outstanding	23,642			23,697			23,760			23,808

	Basic earnings per share	$	0.7		$	0.67		$	0.66		$	0.55

	Diluted weighted average common shares outstanding	23,716			23,736			23,778			23,842

	Diluted earnings per share	$	0.69		$	0.67		$	0.66		$	0.55

	Class B common stock:
	Basic weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Basic earnings per share	$	0.7		$	0.67		$	0.66		$	0.55

Diluted weighted average common shares outstanding	13,193			13,193			13,193			13,193

Diluted earnings per share	$	0.69		$	0.67		$	0.66		$	0.55

Subsequent_Events_Notes

Subsequent Events (Notes)	12 Months Ended
Subsequent Events (Notes)	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	Subsequent Events

	Management has evaluated subsequent events after the balance sheet date through the financial statements issuance date for appropriate accounting and disclosure.

	Acquisition of Allied Technology Group, Inc.

	On February 18, 2014, we completed the acquisition of Allied Technology Group, Inc. (ATG). ATG is an innovative engineering and information management solution company with strong customer relationships and strategic contracts with the Department of Homeland Security (DHS). ATG is a privately held company providing IT, engineering services, program management and training solutions to a variety of federal customers. The acquisition will enable us to deliver services through their unrestricted prime position on DHS's primary acquisition vehicles; the Technical, Acquisition and Business Support Services and the Enterprise Acquisition Gateway for Leading Edge Solutions II. We funded the acquisition with cash on hand. The purchase price was $45.0 million.

Schedule_II

Schedule II	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Valuation and Qualifying Accounts	'
	SCHEDULE II

	Valuation and Qualifying Accounts

	Activities in our allowance accounts for the years ended December 31, 2013, 2012 and 2011 were as follows (in thousands):



	Doubtful Accounts
		Balance at Beginning of Period		Charged to Costs and Expenses	Deductions		Other*		Balance at End of Period
	2011	$	8,946	5	(5	)	783		$	9,729

	2012	$	9,729	—	—		(280	)	$	9,449

	2013	$	9,449	—	—		587		$	10,036



	*	Other represents doubtful account reserves released or recorded as part of net revenues for estimated customer disallowances.



	Deferred Tax Asset Valuation
		Balance at Beginning of Period		Charged to Costs and Expenses	Deductions		Other		Balance at End of Period
	2011	$	—	—	—		—		$	—

	2012	$	—	—	—		—		$	—

	2013	$	—	191	—		—		$	191

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2013
Accounting Policies [Abstract]	'
Principles of Consolidation [Policy Text Block]	'
Principles of Consolidation [Policy Text Block]	Principles of Consolidation-Our consolidated financial statements include the accounts of ManTech International Corporation, subsidiaries we control and variable interest entities that are required to be consolidated. All intercompany accounts and transactions have been eliminated. Investments in entities where we have significant influence, but not control, are accounted for using the equity method.
Use of Accounting Estimates [Policy Text Block]	'
Use of Accounting Estimates [Policy Text Block]	Use of Accounting Estimates-We prepare our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, which require management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates involve judgments with respect to, among other things, various future economic factors that are difficult to predict and are beyond the control of the Company. Therefore, actual amounts could differ from these estimates.
Revenue Recognition [Policy Text Block]	'
Revenue Recognition [Policy Text Block]	Revenue Recognition-We derive the majority of our revenues from cost-plus-fixed-fee, cost-plus-award-fee, firm-fixed-price or time-and-materials contracts. Revenues for cost-reimbursable contracts are recorded as reimbursable costs are incurred, including an estimated share of the applicable contractual fees earned. For performance-based fees under cost-reimbursable contracts, we recognize the relevant portion of the expected fee to be awarded by the customer at the time such fee can be reasonably estimated, based on factors such as our prior award experience and communications with the customer regarding performance, or upon approval by the customer. For time-and-materials contracts, revenues are recognized to the extent of billable rates times hours delivered plus materials and other reimbursable costs incurred. For long-term fixed-price production contracts, revenues are recognized at a rate per unit as the units are delivered or by other methods to measure services provided. Revenues from other long-term fixed-price contracts are recognized ratably over the contract period or by other appropriate methods to measure services provided. Contract costs are expensed as incurred except for certain limited long-term contracts noted below. For long-term contracts, specifically described in the scope section of ASC 605-35, we apply the percentage of completion method. Under the percentage of completion method, income is recognized at a consistent profit margin over the period of performance based on estimated profit margins at completion of the contract. This method of accounting requires estimating the total revenues and total contract cost at completion of the contract. During the performance of long-term contracts, these estimates are periodically reviewed and revisions are made as required using the cumulative catch-up method of accounting. The impact on revenues and contract profit as a result of these revisions is included in the periods in which the revisions are made. This method can result in the deferral of costs or the deferral of profit on these contracts. Because we assume the risk of performing a fixed-price contract at a set price, the failure to accurately estimate ultimate costs or to control costs during performance of the work could result, and in some instances has resulted, in reduced profits or losses for such contracts. Both the individual changes in contract estimates and aggregate net changes in contract estimates recognized using the cumulative catch-up method of accounting were not material to the consolidated statement of operations for all periods presented. Estimated losses on contracts at completion are recognized when identified. In certain circumstances, revenues are recognized when contract amendments have not been finalized.
Cost of Services [Policy Text Block]	'
Cost of Services [Policy Text Block]	Cost of Services-Cost of services consists primarily of compensation expenses for program personnel, the fringe benefits associated with this compensation and other direct expenses incurred to complete programs, including cost of materials and subcontract efforts.
Cash and Cash Equivalents [Policy Text Block]	'
Cash and Cash Equivalents [Policy Text Block]	Cash and Cash Equivalents-For the purpose of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and short-term investments with maturity dates of three months or less at the date of purchase. Due to the short maturity of cash equivalents, the carrying value on our consolidated balance sheets approximates fair value.
Property and Equipment [Policy Text Block]	'
Property and Equipment [Policy Text Block]	Property and Equipment-Property and equipment are recorded at original cost. Upon sale or retirement, the costs and related accumulated depreciation or amortization are eliminated from the respective accounts and any resulting gain or loss is included in income. Maintenance and repairs are charged to expense as incurred.
Depreciation and Amortization Method [Policy Text Block]	'
Depreciation and Amortization Method [Policy Text Block]	Depreciation and Amortization Method-Furniture and office equipment are depreciated using the straight-line method with estimated useful lives ranging from one to seven years. Leasehold improvements are amortized using the straight-line method over the term of the lease.
Contractual Inventory [Policy Text Block]	'
Contractual Inventory [Policy Text Block]	Contractual Inventory-Inventory consists of finished goods purchased for a specific contract.
Goodwill [Policy Text Block]	'
Goodwill [Policy Text Block]	Goodwill-Goodwill represents the excess of cost over the fair value of net tangible and identifiable intangible assets of acquired companies.
Other Intangible Assets [Policy Text Block]	'
	Other Intangible Assets-Contract rights and other intangible assets are amortized primarily using the pattern of benefits method over periods ranging from one to twenty-five years.

	We accounted for the cost of computer software developed or obtained for internal use in accordance with ASC 350-985, Software. These capitalized software costs are included in other intangible assets, net.

	We account for software development costs related to software products for sale, lease or otherwise marketed in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed. For projects fully funded by us, development costs are capitalized from the point of demonstrated technological feasibility until the point in time that the product is available for general release to customers. Once the product is available for general release, capitalized costs are amortized based on units sold or on a straight-line basis over a five-year period or other such shorter period as may be required.
Impairment of Long-Lived Assets [Policy Text Block]	'
	Impairment of Long-Lived Assets-Whenever events or changes in circumstances indicate that the carrying amount of long-lived assets may not be fully recoverable, we evaluate the probability that future undiscounted net cash flows, without interest charges, will be less than the carrying amount of the assets. If any impairment were indicated as a result of this review, we would recognize a loss based on the amount by which the carrying amount exceeds the estimated fair value.

	We review goodwill at least annually for impairment, or whenever events or circumstances indicate that the carrying value of long-lived assets may not be fully recoverable. We have elected to perform our annual review during the second quarter of each calendar year. If any impairment was indicated as a result of a review, we would recognize a loss based on the amount by which the carrying amount exceeds the estimated fair value. As a result of interim analysis conducted in the fourth quarter of 2013, we recorded a non-cash goodwill impairment charge of $118.4 million for the period ending December 31, 2013. Furthermore, other intangible assets were tested for impairment in conjunction with the interim analysis and no impairment loss was identified.
Employee Supplemental Savings Plan Assets [Policy Text Block]	'
	Employee Supplemental Savings Plan Assets-We maintain several non-qualified defined contribution supplemental retirement plans for certain key employees that are accounted for in accordance with ASC 710-10-05, Deferred Compensation - Rabbi Trusts, as the underlying assets are held in rabbi trusts with investments directed by the respective employee. A rabbi trust is a grantor trust generally set up to fund compensation for a select group of management and the assets of this trust are available to satisfy the claims of general creditors in the event of bankruptcy of the Company. The assets held by the rabbi trusts are recorded at cash surrender value in our consolidated financial statements as Employee Supplemental Savings Plan assets with a related liability to employees recorded as a deferred compensation liability in accrued retirement.
Billings In Excess of Revenue Earned [Policy Text Block]	'
Billings In Excess of Revenue Earned [Policy Text Block]	Billings In Excess of Revenue Earned-We receive advances and milestone payments from customers that exceed the revenues earned to date. We classify such items as current liabilities.
Stock-based Compensation [Policy Text Block]	'
Stock-based Compensation [Policy Text Block]	Stock-based Compensation-We account for stock-based compensation in accordance with ASC 718, Compensation - Stock Compensation. ASC 718 requires the use of a valuation model to calculate the fair value of stock-based awards. We have elected to use the Black-Scholes-Merton pricing model to determine fair value on the dates of grant. The fair value is included in operating expenses or capitalized, as appropriate, straight-line over the period in which service is provided in exchange for the award.
Income Taxes [Policy Text Block]	'
Income Taxes [Policy Text Block]	Income Taxes-We account for income taxes in accordance with ASC 740, Income Taxes. Under this method, deferred income taxes are determined based on the estimated future tax effects of differences between the financial statement and tax bases of assets and liabilities given the provisions of enacted tax laws. Deferred income tax provisions and benefits are based on changes to the assets or liabilities from year-to-year. In providing for deferred taxes, we consider tax regulations of the jurisdictions in which we operate, estimates of future taxable income and available tax planning strategies. If tax regulations, operating results or the ability to implement tax-planning strategies vary, adjustments to the carrying value of deferred tax assets and liabilities may be required. Valuation allowances are recorded related to deferred tax assets based on the “more likely than not” criteria. We recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would “more likely than not” sustain the position following an audit. For tax positions meeting the “more likely than not” threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority.
Foreign-Currency Translation [Policy Text Block]	'
Foreign-Currency Translation [Policy Text Block]	Foreign-Currency Translation-All assets and liabilities of foreign subsidiaries are translated into U.S. dollars at fiscal year-end exchange rates. Income and expense items are translated at average monthly exchange rates prevailing during the fiscal year. The resulting translation adjustments are recorded as a component of accumulated other comprehensive income (loss).
Comprehensive Income (Loss) [Policy Text Block]	'
Comprehensive Income (Loss) [Policy Text Block]	Comprehensive Income (Loss)-Comprehensive income (loss) is presented in our consolidated statements of changes in stockholders' equity. Comprehensive income (loss) consists of net income (loss); translation adjustments, net of tax; and actuarial gain (loss) on defined benefit pension plan, net of tax.
Fair Value of Financial Instruments [Policy Text Block]	'
Fair Value of Financial Instruments [Policy Text Block]	Fair Value of Financial Instruments-The carrying value of our cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair value because of the short-term nature of these amounts.
Variable Interest Entities [Policy Text Block]	'
Variable Interest Entities [Policy Text Block]	Variable Interest Entities-We determine whether we have a controlling financial interest in a Variable Interest Entity (VIE). The reporting entity with a variable interest or interest that provides the reporting entity with a controlling financial interest in a VIE will have both (a) the power to direct the activities of a VIE that most significantly impact the VIE's economic performance and (b) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. We have one entity that has been consolidated as a VIE. The purpose of the entity is to perform on certain U.S. Navy contracts. The maximum amount of loss we are exposed to as of December 31, 2013 was not material to our consolidated financial statements.
Equity Method Investments [Policy Text Block]	'
Equity Method Investments [Policy Text Block]	Equity Method Investments-Investments where we have the ability to exercise significant influence, but we do not control, are accounted for under the equity method of accounting and are included in other assets on our consolidated balance sheets. Significant influence typically exists if we have a 20% to 50% ownership interest in the investee. Under this method of accounting, our share of the net earnings or losses of the investee is included in equity in losses of unconsolidated subsidiaries on our consolidated statement of income and loss.

Earnings_Loss_per_Share_Tables

Earnings (Loss) per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings (Loss) Per Share, Basic and Diluted [Table Text Block]	'
	The net income (loss) available to common stockholders and weighted average number of common shares outstanding used to compute basic and diluted earnings (loss) per share for each class of common stock are as follows (in thousands, except per share amounts):



		Year Ended
		December 31,
		2013			2012		2011
	Distributed earnings	$	31,200		$	31,050	$	30,872

	Undistributed earnings (loss)	(37,349		)	63,969		102,434

	Net income (loss)	$	(6,149	)	$	95,019	$	133,306


	Class A common stock:
	Basic net income (loss) available to common stockholders	$	(3,963	)	$	61,065	$	85,172

	Basic weighted average common shares outstanding	23,913			23,727		23,415

	Basic earnings (loss) per share	$	(0.17	)	$	2.57	$	3.64


	Diluted net income (loss) available to common stockholders	$	(3,963	)	$	61,103	$	85,323

	Effect of potential exercise of stock options	—			41		115

	Diluted weighted average common shares outstanding	23,913			23,768		23,530

	Diluted earnings (loss) per share	$	(0.17	)	$	2.57	$	3.63


	Class B common stock:
	Basic net income (loss) available to common stockholders	$	(2,186	)	$	33,954	$	48,134

	Basic weighted average common shares outstanding	13,193			13,193		13,233

	Basic earnings (loss) per share	$	(0.17	)	$	2.57	$	3.64


	Diluted net income (loss) available to common stockholders	$	(2,186	)	$	33,916	$	47,983

	Effect of potential exercise of stock options	—			—		—

	Diluted weighted average common shares outstanding	13,193			13,193		13,233

	Diluted earnings (loss) per share	$	(0.17	)	$	2.57	$	3.63

Receivables_Tables

Receivables (Tables)	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]	'
Schedule of Contract Receivables [Table Text Block]	'
	The components of contract receivables are as follows (in thousands):



		December 31,
		2013			2012
	Billed receivables	$	370,975		$	420,598

	Unbilled receivables:
	Amounts billable	84,582			119,893

	Revenues recorded in excess of funding	9,743			11,148

	Retainage	2,634			6,119

	Allowance for doubtful accounts	(10,036		)	(9,449		)
	Receivables-net	$	457,898		$	548,309

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property and Equipment [Table Text Block]	'
	Major classes of property and equipment are summarized as follows (in thousands):



		December 31,
		2013			2012
	Furniture and equipment	$	50,989		$	94,934

	Leasehold improvements	33,535			28,932

		84,524			123,866

	Accumulated depreciation and amortization	(54,368		)	(95,278		)
	Total property and equipment, net	$	30,156		$	28,588

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill [Table Text Block]	'
	The changes in the carrying amounts of goodwill during fiscal years 2013 and 2012 were as follows (in thousands):



		Goodwill Balance
	31-Dec-11	$	808,455
	31-Dec-11	$	808,455
	Acquisitions	53,245
	Acquisitions	53,245
	Additional consideration	212
	Additional consideration	212
	31-Dec-12	861,912
	31-Dec-12	861,912
	Impairment	(118,427		)
	Acquisitions	9,382
	Acquisitions	9,382
	31-Dec-13	$	752,867
	31-Dec-13	$	752,867
Schedule of Other Intangible Assets [Table Text Block]	'
	Other intangible assets consisted of the following (in thousands):



		December 31, 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		$	109,586	$	141,986	$	249,882	$	92,400	$	157,482
	Contract and program intangible assets	$	251,572		$	109,586	$	141,986	$	249,882	$	92,400	$	157,482
	Capitalized software cost for internal use	34,083			23,617		10,466		30,985		20,637		10,348
	Capitalized software cost for internal use	34,083			23,617		10,466		30,985		20,637		10,348
	Other	115			44		71		115		35		80
	Other	115			44		71		115		35		80
	Total other intangible assets, net	$	285,770		$	133,247	$	152,523	$	280,982	$	113,072	$	167,910
	Total other intangible assets, net	$	285,770		$	133,247	$	152,523	$	280,982	$	113,072	$	167,910
Schedule of Other Intangible Assets, Future Amortization Expense [Table Text Block]	'
	We estimate that we will have the following amortization expense for the future periods indicated below (in thousands):



	Year ending:
	December 31, 2014	$	18,304
	December 31, 2014	$	18,304
	December 31, 2015	$	15,695
	December 31, 2015	$	15,695
	December 31, 2016	$	13,694
	December 31, 2016	$	13,694
	December 31, 2017	$	11,977
	December 31, 2017	$	11,977
	December 31, 2018	$	10,786
	December 31, 2018	$	10,786

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Long-term Debt [Table Text Block]	'
	Long-term debt consisted of the following (in thousands):



		December 31,
		2013		2012
	Revolving credit facility	$	—	$	—

	7.25% senior unsecured notes	200,000		200,000

	Long-term debt	$	200,000	$	200,000

Revolving Credit Facility [Tabular Text Block]	'
	The following table summarizes the activity under our revolving credit facility for the years ended December 31, 2013, 2012 and 2011 (in thousands):



		Year Ended
		December 31,
		2013		2012			2011
	Borrowings under revolving credit facility	$	—	$	9,000		$	—

	Repayment of borrowings under revolving credit facility	$	—	$	(9,000	)	$	—

Commitments_and_Contingencies_1

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	At December 31, 2013, aggregate future minimum rental commitments under these leases are as follows (in thousands):



		Office Space		Equipment		Total
	Year ending:
	December 31, 2014	$	30,403	$	641	$	31,044

	December 31, 2015	24,801		54		24,855

	December 31, 2016	21,555		—		21,555

	December 31, 2017	19,127		—		19,127

	December 31, 2018	19,321		—		19,321

	Thereafter	72,887		—		72,887

	Total	$	188,094	$	695	$	188,789

Stockholders_Equity_and_StockB1

Stockholders Equity and Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders Equity and Stock-Based Compensation [Abstract]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
	The following table summarizes weighted-average assumptions used in our calculations of fair value for the years ended December 31, 2013, 2012 and 2011:



		Year Ended
		December 31,
		2013		2012			2011
	Volatility	31.92	%	31.68	%		35.08	%
	Expected life of options	3 years		3 years			3 years

	Risk-free interest rate	0.56	%	0.48	%		0.81	%
	Dividend yield	3	%	2.7	%		0.7	%
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
	The following table summarizes stock option activity for the years ended December 31, 2013, 2012 and 2011:



		Number of Shares		Weighted Average Exercise Price				Aggregate Intrinsic Value
								(in thousands)
	Stock options at December 31, 2010	2,473,257		$	42.22			$	7,731

	Granted	986,000		$	38.56

	Exercised	(271,165	)	$	27.94			$	3,087

	Cancelled and expired	(301,982	)	$	45.07

	Stock options at December 31, 2011	2,886,110		$	41.14			$	1,096

	Granted	986,650		$	29.24

	Exercised	(38,542	)	$	28.93			$	215

	Cancelled and expired	(413,022	)	$	39.27

	Stock options at December 31, 2012	3,421,196		$	38.61			$	626

	Granted	957,525		$	27.42

	Exercised	(79,567	)	$	22.75			$	400

	Cancelled and expired	(899,034	)	$	39.84

	Stock options at December 31, 2013	3,400,120		$	35.51			$	4,488

Schedule of Non-Vested Share Activity [Table Text Block]	'
	The following table summarizes non-vested stock options for the year ended December 31, 2013:



		Number of Shares		Weighted Average Fair Value
	Non-vested stock options at December 31, 2012	1,697,992		$	7.37

	Granted	957,525		$	4.84

	Vested	(704,599	)	$	8.6

	Cancelled	(382,973	)	$	6.4

	Non-vested stock options at December 31, 2013	1,567,945		$	5.51

Stock Options Exercisable And Expected To Vest [Table Text Block]	'
	The following table includes information concerning stock options exercisable and stock options expected to vest at December 31, 2013:



		Number of Shares		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Aggregate Intrinsic Value
				(years)						(in thousands)
	Stock options exercisable	1,832,175		1.7		$	40.72			$	1,168

	Stock options expected to vest	1,002,286		3.6		$	30.24			$	2,098

	Stock options exercisable and expected to vest	2,834,461

Schedule of Share-based Compensation, Restricted Stock Activity [Table Text Block]	'
	The following table summarizes the restricted stock activity during the years ended December 31, 2012 and 2013:



		Number of Shares		Grant Date
				Fair Value
				(in thousands)
	Non-vested restricted stock at December 31, 2011	30,667

	Granted	24,000		$	576

	Vested	(27,334	)	$	1,237

	Forfeited	—

	Non-vested restricted stock at December 31, 2012	27,333

	Granted	24,000		$	664

	Vested	(30,333	)	$	825

	Forfeited	—

	Non-vested restricted stock at December 31, 2013	21,000

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	'
	The domestic and foreign components of income operations before income taxes and equity method investments were as follows (in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	Domestic	$	6,768			$	155,381			$	215,437

	Foreign	(215		)		(427		)		65

	Income from operations before income taxes and equity method investments	$	6,553			$	154,954			$	215,502

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
	The provision for income taxes was comprised of the following components (in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	Current provision (benefit):
	Federal	$	18,702			$	37,926			$	75,505

	State	4,011				5,780				10,601

	Foreign	86				123				293

		22,799				43,829				86,399

	Deferred provision (benefit):
	Federal	(6,557		)		15,241				(3,209		)

	State	(1,858		)		2,332				(97		)

		(8,415		)		17,573				(3,306		)

	Non-current provision (benefit) resulting from allocating tax benefits directly to additional paid in capital and changes in liabilities:
	Federal	(2,009		)		(1,306		)		(787		)
	State	(522		)		(161		)		(116		)
	Foreign	(11		)		—				6

		(2,542		)		(1,467		)		(897		)
	Provision for income taxes	$	11,842			$	59,935			$	82,196

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
	The schedule of effective income tax rate reconciliation is as follows:



		Year Ended
		December 31,
		2013			2012			2011
	Statutory U.S. Federal tax rate	35	%		35	%		35	%
	Increase (decrease) in tax rate resulting from:
	Goodwill impairment	200.1	%		—	%		—	%
	Deferred compensation (ESSP)	(24.6	)%		(0.5	)%		0.2	%
	State taxes—net of Federal benefit	18.6	%		3.3	%		3.1	%
	Excess executive compensation	16.7	%		0.8	%		0.3	%
	Tax basis deduction of investment	(15.3	)%		—	%		—	%
	Provisions of American Taxpayer Relief Act of 2012	(10.3	)%		—	%		—	%
	Section 199 deductions	(6.5	)%		(0.2	)%		(0.1	)%
	Acquisition working capital settlement	(5.0	)%		—	%		—	%
	Other, net	(0.7	)%		0.3	%		(0.4	)%
	Effective tax rate	208	%		38.7	%		38.1	%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	'
	A summary of the tax effect of the significant components of deferred income taxes is as follows (in thousands):



		December 31,
		2013				2012
	Gross deferred tax liabilities:
	Goodwill and other assets	$	68,940			$	87,713

	Unbilled receivables	10,099				14,921

	Property and equipment	5,442				—

	Total	84,481				102,634


	Gross deferred tax assets:
	Retirement and other liabilities	(33,505		)		(32,110		)
	Allowance for potential contract losses and other contract reserves	(3,687		)		(3,402		)
	Federal and state operating loss carryforwards	(829		)		(3,306		)
	Property and equipment	—				(8,905		)

	Total	(38,021		)		(47,723		)
	Net deferred tax liabilities	$	46,460			$	54,911

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	'
	A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows (in thousands):



		December 31,
		2013				2012				2011
	Gross unrecognized tax benefits at beginning of year	$	1,376			$	1,440			$	2,519

	Increases in tax positions for prior years	95				18				87

	Decreases in tax positions for prior years	(26		)		—				(71		)

	Increases in tax positions for current year	69				141				269

	Lapse in statute of limitations	(307		)		(223		)		(961		)
	Settlements	—				—				(508		)

	Increase in tax positions resulting from acquisitions	—				—				105

	Gross unrecognized tax benefits at end of year	$	1,207			$	1,376			$	1,440

Business_Segment_and_Geographi1

Business Segment and Geographic Area Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Schedule of Revenues By Geographic Customer and Related Percentage of Total Revenues [Table Text Block]	'
	Revenues by geographic customer and the related percentages of total revenues for the years ended December 31, 2013, 2012 and 2011, were as follows (dollars in thousands):



		Year Ended
		December 31,
		2013				2012				2011
	United States	$	2,305,325	99.8	%	$	2,577,495	99.8	%	$	2,861,038	99.7	%

	International	4,747		0.2	%	4,800		0.2	%	8,944		0.3	%

	Total	$	2,310,072			$	2,582,295			$	2,869,982

Quarterly_Financial_Informatio1

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Information [Table Text Block]	'
	The following tables set forth selected unaudited quarterly financial data (the quarter ending December 31, 2013 contains a goodwill impairment charge of $118.4 million):



		2013
		March 31,			June 30,			September 30,			December 31,
		(in thousands, except per share data)
	Revenues	$	646,008		$	605,129		$	567,399		$	491,536

	Operating income (loss)	$	36,371		$	38,671		$	32,039		$	(84,838	)

	Income (loss) from operations before income taxes and equity method investments	$	32,479		$	34,632		$	28,082		$	(88,640	)

	Net income (loss)	$	20,180		$	21,551		$	17,718		$	(65,598	)


	Class A common stock:
	Basic weighted average common shares outstanding	23,832			23,910			23,944			23,963

	Basic earnings (loss) per share	$	0.55		$	0.58		$	0.48		$	(1.77	)

	Diluted weighted average common shares outstanding	23,876			23,940			23,982			23,963

	Diluted earnings (loss) per share	$	0.54		$	0.58		$	0.48		$	(1.77	)

	Class B common stock:
	Basic weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Basic earnings (loss) per share	$	0.55		$	0.58		$	0.48		$	(1.77	)

	Diluted weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Diluted earnings (loss) per share	$	0.54		$	0.58		$	0.48		$	(1.77	)


		2012
		March 31,			June 30,			September 30,			December 31,
		(in thousands, except per share data)
	Revenues	$	676,509		$	638,937		$	645,028		$	621,821

	Operating income	$	45,695		$	44,880		$	42,759		$	37,654

	Income from operations before income taxes	$	41,634		$	40,835		$	38,777		$	33,708

	Net income	$	25,642		$	24,745		$	24,427		$	20,205


	Class A common stock:
	Basic weighted average common shares outstanding	23,642			23,697			23,760			23,808

	Basic earnings per share	$	0.7		$	0.67		$	0.66		$	0.55

	Diluted weighted average common shares outstanding	23,716			23,736			23,778			23,842

	Diluted earnings per share	$	0.69		$	0.67		$	0.66		$	0.55

	Class B common stock:
	Basic weighted average common shares outstanding	13,193			13,193			13,193			13,193

	Basic earnings per share	$	0.7		$	0.67		$	0.66		$	0.55

	Diluted weighted average common shares outstanding	13,193			13,193			13,193			13,193

Diluted earnings per share	$	0.69		$	0.67		$	0.66		$	0.55

Description_of_the_Business_Na

Description of the Business (Narrative) (Details)	12 Months Ended
	Dec. 31, 2013
	contracts
	federalagenices
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Number of Federal Agencies	50
Number of Contracts	1,000

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Jun. 30, 2013	Entities	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]	'	'	'	'
Goodwill impairment	$0	$118,427	$0	$0
Other intangible asset impairment	'	$0	'	'
More Likely Than Not Threshold	'	50.00%	'	'
Number of Consolidated Variable Interest Entities	'	1	'	'
Minimum [Member]	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'1 year	'	'
Equity Method Investment, Ownership Percentage	'	20.00%	'	'
Maximum [Member]	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'
Maturity Threshold For Including In Cash And Cash Equivalent	'	'3 months	'	'
Property, Plant and Equipment, Useful Life	'	'7 years	'	'
Equity Method Investment, Ownership Percentage	'	50.00%	'	'
Other Intangible Assets [Member] \| Minimum [Member]	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'1 year	'	'
Other Intangible Assets [Member] \| Maximum [Member]	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'25 years	'	'
Capitalized Software Cost For Sale [Member]	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'5 years	'	'

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details) (USD $)

12 Months Ended

9 Months Ended

12 Months Ended

2 Months Ended

12 Months Ended

11 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

ALTA Systems, Inc [Member]

HBGary, Inc. [Member]

Evolvent Technologies, Inc. [Member]

Worldwide Information Network Systems, Inc. [Member]

Tran Tech, Inc [Member]