V2X (VVX) 10-K 26 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 19, 2019	Jun. 29, 2018
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	VEC
Entity Registrant Name	Vectrus, Inc.
Entity Central Index Key	1,601,548
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		11,266,906
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 340,106,528
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue									$ 1,279,304	$ 1,114,788	$ 1,190,519
Cost of revenue									1,164,609	1,012,840	1,083,607
Selling, general and administrative expenses									66,372	60,728	64,086
Operating income	$ 12,648	$ 14,006	$ 12,998	$ 8,671	$ 10,277	$ 10,090	$ 9,204	$ 11,649	48,323	41,220	42,826
Interest expense, net									(5,071)	(4,640)	(5,639)
Income from operations before income taxes									43,252	36,580	37,187
Income tax expense (benefit)									7,956	(22,917)	13,532
Net income	$ 10,124	$ 9,866	$ 9,195	$ 6,111	$ 41,568	$ 5,800	$ 5,461	$ 6,668	$ 35,296	$ 59,497	$ 23,655
Earnings Per Share
Basic (in dollars per share)	$ 0.90	$ 0.88	$ 0.82	$ 0.55	$ 3.77	$ 0.52	$ 0.50	$ 0.61	$ 3.14	$ 5.40	$ 2.21
Diluted (in dollars per share)	$ 0.89	$ 0.86	$ 0.81	$ 0.54	$ 3.70	$ 0.51	$ 0.49	$ 0.60	$ 3.10	$ 5.31	$ 2.16
Weighted average common shares outstanding - basic (in shares)	11,262	11,248	11,235	11,146	11,026	11,075	10,987	10,909	11,224	11,021	10,714
Weighted average common shares outstanding - diluted (in shares)	11,369	11,406	11,383	11,338	11,234	11,272	11,191	11,075	11,378	11,209	10,974

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 35,296	$ 59,497	$ 23,655
Changes in derivative instrument:
Net change in fair value of interest rate swaps	292	(240)	216
Net change in fair value of foreign currency forwards	(358)	(1)	(2)
Tax benefit (expense)	14	86	(76)
Net change in derivative instrument	(52)	(155)	138
Foreign currency translation adjustments	(1,426)	3,052	(975)
Other comprehensive (loss) income, net of tax	(1,478)	2,897	(837)
Total comprehensive income	$ 33,818	$ 62,394	$ 22,818

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash	$ 66,145	$ 77,453
Receivables	232,119	174,995
Costs incurred in excess of billings	0	12,751
Other current assets	15,063	6,747
Total current assets	313,327	271,946
Property, plant, and equipment, net	13,419	3,733
Goodwill	233,619	216,930
Intangible assets, net	8,630	121
Other non-current assets	3,248	2,821
Total non-current assets	258,916	223,605
Total Assets	572,243	495,551
Current liabilities
Accounts payable	156,393	115,899
Billings in excess of costs	0	3,766
Compensation and other employee benefits	41,790	39,304
Short-term debt	4,500	4,000
Other accrued liabilities	22,303	19,209
Total current liabilities	224,986	182,178
Non-current liabilities
Long-term debt	69,137	73,211
Deferred tax liability	55,358	55,329
Other non-current liabilities	1,462	1,461
Total non-current liabilities	125,957	130,001
Total liabilities	350,943	312,179
Commitments and contingencies (Note 17)
Shareholders' Equity
Preferred stock; $0.01 par value; 10,000,000 shares authorized; No shares issued and outstanding	0	0
Common stock; $0.01 par value; 100,000,000 shares authorized; 11,266,906 and 11,120,528 shares issued and outstanding as of December 31, 2018 and 2017, respectively	113	111
Additional paid in capital	71,729	67,526
Retained earnings	152,616	117,415
Accumulated other comprehensive loss	(3,158)	(1,680)
Total shareholders' equity	221,300	183,372
Total Liabilities and Shareholders' Equity	$ 572,243	$ 495,551

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	11,266,906	11,120,528
Common stock, shares outstanding (in shares)	11,266,906	11,120,528

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net income	$ 35,296	$ 59,497	$ 23,655
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	1,798	1,686	1,920
Amortization of intangible assets	1,999	0	0
Loss on disposal of property, plant, and equipment	348	0	405
Stock-based compensation	4,096	4,467	4,649
Amortization of debt issuance costs	426	1,464	1,198
Changes in assets and liabilities:
Receivables	(24,646)	178	37,814
Other assets	(8,193)	3,455	(13,903)
Accounts payable	29,960	(4,346)	(3,766)
Billings in excess of costs	0	2,345	(4,605)
Deferred taxes	475	(35,321)	(2,163)
Compensation and other employee benefits	178	3,256	(1,808)
Other liabilities	(1,681)	(1,271)	(6,778)
Net cash provided by operating activities	40,056	35,410	36,618
Investing activities
Purchases of capital assets	(10,025)	(2,344)	(741)
Proceeds from the disposition of assets	33	0	116
Acquisition of business, net of cash acquired	(36,855)	0	0
Distributions from equity investment	0	0	573
Net cash (used in) investing activities	(46,847)	(2,344)	(52)
Financing activities
Proceeds from issuance of long-term debt	0	80,000	0
Repayments of long-term debt	(4,000)	(86,000)	(29,000)
Proceeds from revolver	207,000	42,500	74,000
Repayments of revolver	(207,000)	(42,500)	(74,000)
Proceeds from exercise of stock options	1,595	2,031	2,146
Payment of debt issuance costs	0	(1,844)	(221)
Payments of employee withholding taxes on share-based compensation	(880)	(1,317)	(987)
Net cash (used in) financing activities	(3,285)	(7,130)	(28,062)
Exchange rate effect on cash	(1,232)	3,866	(848)
Net change in cash	(11,308)	29,802	7,656
Cash-beginning of year	77,453	47,651	39,995
Cash-end of year	66,145	77,453	47,651
Supplemental Disclosure of Cash Flow Information:
Interest paid	4,973	5,886	5,278
Income taxes paid	11,588	4,802	26,068
Purchase of capital assets on account	$ 1,128	$ 0	$ 0

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Issued	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2015		10,612
Balance at Dec. 31, 2015	$ 89,310	$ 106	$ 58,640	$ 34,304	$ (3,740)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,655			23,655
Foreign currency translation adjustments	(975)				(975)
Unrealized gain (loss) on cash flow hedge	138				138
Employee stock awards and stock options (in shares)		283
Employee stock awards and stock options	1,291	$ 3	1,288
Stock-based compensation	3,982		3,982
Balance (in shares) at Dec. 31, 2016		10,895
Balance at Dec. 31, 2016	117,401	$ 109	63,910	57,959	(4,577)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU			41	(41)
Net income	59,497			59,497
Foreign currency translation adjustments	3,052				3,052
Unrealized gain (loss) on cash flow hedge	(155)				(155)
Employee stock awards and stock options (in shares)		226
Employee stock awards and stock options	714	$ 2	712
Stock-based compensation	2,863		2,863
Balance (in shares) at Dec. 31, 2017		11,121
Balance at Dec. 31, 2017	183,372	$ 111	67,526	117,415	(1,680)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU	(95)			(95)
Net income	35,296			35,296
Foreign currency translation adjustments	(1,426)				(1,426)
Unrealized gain (loss) on cash flow hedge	(52)				(52)
Employee stock awards and stock options (in shares)		146
Employee stock awards and stock options	715	$ 2	713
Stock-based compensation	3,490		3,490
Balance (in shares) at Dec. 31, 2018		11,267
Balance at Dec. 31, 2018	$ 221,300	$ 113	$ 71,729	$ 152,616	$ (3,158)

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Summary of Significant Accounting Policies	DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business and Basis of Presentation Our Business Vectrus, Inc. is a leading provider of services to the U.S. government worldwide. We operate as one segment and offer facility and logistics services and information technology and network communications services. Vectrus was incorporated in the State of Indiana on February 4, 2014. On September 27, 2014, Exelis Inc. (Exelis) completed the spin-off (the Spin-off) of Vectrus and Vectrus became an independent, publicly traded company. The Consolidated Financial Statements reflect the consolidated operations of Vectrus as a separate stand-alone entity. Unless the context otherwise requires, references in these notes to "Vectrus", "we," "us," "our," "the Company" and "our Company" refer to Vectrus, Inc. References in these notes to Exelis or "Former Parent" refer to Exelis Inc., an Indiana corporation, and its consolidated subsidiaries (other than Vectrus). Exelis was acquired by Harris Corporation in May 2015. Equity Investment In 2011, we entered into a joint venture agreement with Shaw Environmental & Infrastructure, Inc., which is now Aptim Federal Services LLC. Pursuant to the joint venture agreement, High Desert Support Services, LLC (HDSS) was established to pursue and perform work on the Ft. Irwin Installation Support Services Contract, which was awarded to HDSS in October 2012. We account for our investment in HDSS under the equity method as we have the ability to exercise significant influence, but do not hold a controlling interest. We record our proportionate 40% share of income or losses, which has historically been insignificant, in the Consolidated Statements of Income. Our investment in HDSS is recorded in other non-current assets in the Consolidated Balance Sheets. When we receive cash distributions from HDSS, the cash distribution is compared to cumulative earnings and any excess is recorded as a distribution from equity investment in the Consolidated Statements of Cash Flows. Any remaining cash distribution is recorded in other assets in the Consolidated Statements of Cash Flows. As of December 31, 2018 and December 31, 2017, our investment balance in HDSS was $2.4 million and $1.7 million , respectively. Summary of Significant Accounting Policies Principles of Consolidation Vectrus consolidates companies in which it has a controlling financial interest. All intercompany transactions and balances have been eliminated. Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Estimates are revised as additional information becomes available. Estimates and assumptions are used for, but not limited to, revenue recognition, income taxes, fair value and impairment of goodwill and valuation of assets and certain contingent liabilities. Actual results could differ from these estimates. Reclassifications Certain reclassifications have been made to the presentation of amounts in our Consolidated Balance Sheet as of December 31, 2017 to conform to the current year presentation. Specifically, certain intangible assets were reclassified from non-current assets and are now presented separately on our Consolidated Balance Sheets. Revenue Recognition In 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606). Several ASUs have been issued since the issuance of ASU 2014-09, which modify certain sections of ASU 2014-09 and are intended to promote a more consistent interpretation and application of the principles outlined in the standard. We adopted the new standard, Accounting Standards Codification (ASC) Topic 606, on January 1, 2018, using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings. See Note 3, "Revenue," for the quantification of these adjustments. As a defense contractor engaging in long-term contracts, substantially all of our revenue is derived from long-term service contracts. The unit of account for revenue in ASC Topic 606 is a performance obligation. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. To determine the proper revenue recognition method, consideration is given as to whether a single contract should be accounted for as more than one performance obligation. For most of our contracts, the customer contracts with us to perform an integrated set of tasks and deliverables as a single service solution, whereby each service is not separately identifiable from other promises in the contract and therefore is not distinct. As a result, when this integrated set of tasks exists, the contract is accounted for as one performance obligation. The vast majority of our contracts have a single performance obligation. Unexercised contract options and indefinite delivery and indefinite quantity (IDIQ) contracts are considered to be separate contracts when the option or IDIQ task order is exercised or awarded. Our performance obligations are satisfied over time as services are provided throughout the contract term. We recognize revenue over time using the input method (e.g., costs incurred to date relative to total estimated costs at completion) to measure progress. Our over time recognition is reinforced by the fact that our customers simultaneously receive and consume the benefits of our services as they are performed. For most U.S. Government contracts, this continuous transfer of control to the customer is supported by clauses in the contract that allow the customer to unilaterally terminate the contract for convenience, pay us for costs incurred plus a reasonable profit and take control of any work in process. This continuous transfer of control requires that we track progress towards completion of performance obligations in order to measure and recognize revenue. Accounting for contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events. These assumptions include labor productivity and availability; the complexity of the services being performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including award and incentive fees, inspection of supplies and services, and fluctuation in allowable indirect reimbursable costs. We include award or incentive fees in the estimated transaction price when there is certainty and a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. The inspection of supplies and services is a factor because the U.S. government can reduce the transaction price if we do not perform the services in compliance with contract requirements. The fluctuation of allowable indirect reimbursable costs is a factor because the U.S. government has the right to review our accounting records and retroactively adjust the reimbursable rate. Any prior adjustments are reflected in the U.S. government reserve amounts recorded in our financial statements. We estimate variable consideration at the most likely amount that we expect to be entitled to receive. Refer to Note 17, "Commitments and Contingencies" for additional information regarding U.S. government reserve amounts. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract estimates regularly. We recognize adjustments in estimated profit on executed contracts cumulatively. The impact of the adjustments on profit recorded to date is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the quarter it is identified. Contracts are often modified to account for changes in contract specifications and requirements. If the modification either creates new enforceable rights and obligations or changes the existing enforceable rights and obligations, the modification will be treated as a separate contract. Historically, our contract modifications have not been distinct from the existing contract and have been accounted for as if they were part of that existing contract. The impact of adjustments in contract estimates on our operating income can be reflected in either revenue or cost of revenue. Cumulative adjustments for the years ended December 31, 2018 , 2017 and 2016 are presented in the following table: Year Ended December 31, (In thousands) 2018 2017 2016 Favorable adjustments $ 14,962 $ 18,256 $ 15,296 Unfavorable adjustments (13,359 ) (6,704 ) (7,837 ) Net favorable adjustments $ 1,603 $ 11,552 $ 7,459 The timing of revenue recognition, billings and cash collections results in billed and unbilled accounts receivable (contract assets) and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheets. Amounts are billed as work progresses in accordance with agreed-upon contractual terms at periodic intervals (e.g., biweekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we may receive advances or deposits from our customers, before revenue is recognized, resulting in contract liabilities. These advance billings and payments are not considered significant financing components because they are frequently intended to fund current operating expenses under the contract. These assets and liabilities are reported on the Consolidated Balance Sheets on a contract-by-contract basis at the end of each reporting period. Our primary customer is the U.S. Department of Defense, with a high concentration in the U.S. Army. For the year ended December 31, 2018 , 2017 and 2016, we had total revenue of $1.3 billion , $1.1 billion , and $1.2 billion , all of which was derived from U.S. government customers. For the years ended December 31, 2018 , 2017 and 2016 , we generated approximately 73% , 82% and 84% , respectively, of our total revenue from the U.S. Army. Income Taxes We determine the provision or benefit for income taxes using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. In assessing the need for a valuation allowance, we look to the future reversal of existing taxable temporary differences, taxable income in carryback years, the feasibility of tax planning strategies, and estimated future taxable income. The valuation allowance can be affected by changes to tax laws, changes to statutory tax rates and changes to future taxable income estimates. Goodwill Goodwill represents purchase consideration paid in a business combination that exceeds the fair values assigned to the net assets of acquired businesses. Goodwill is not amortized, but instead is tested for impairment annually (or more frequently if impairment indicators arise, such as changes to the reporting unit structure or significant adverse changes in the business climate). We conduct our annual impairment testing during the fourth fiscal quarter. In reviewing goodwill for impairment, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the estimated fair value of a reporting unit is less than its carrying amount. If we elect to perform a qualitative assessment and determine that an impairment is more likely than not, the entity is then required to perform the existing two-step quantitative impairment test as described below. Otherwise, no further analysis is required. We also may elect not to perform the qualitative assessment and, instead, proceed directly to the two-step quantitative impairment test. The quantitative impairment test is a two-step test. In the first step, the estimated fair value of the reporting unit is developed and compared to the carrying value of the reporting unit. If the estimated fair value of the reporting unit exceeds its carrying value, goodwill is not impaired and the second step of the impairment test is not performed. If the carrying value of the reporting unit exceeds its estimated fair value, then the second step of the impairment test is performed in order to measure the impairment loss to be recorded. If the carrying value of the reporting unit's goodwill exceeds its implied fair value, then we record an impairment loss equal to the difference. We estimate the fair value of our reporting unit using an income approach and a market approach. Under the income approach, we estimate fair value based on the present value of estimated future cash flows. Under the market approach, we compare our company to select reasonably similar publicly traded companies. We acquired SENTEL in 2018. See Note 5, "SENTEL Acquisition" for further discussion of goodwill recognized in the SENTEL acquisition. Intangible Assets We recognize an acquired intangible asset apart from goodwill whenever the intangible arises from contractual or other legal rights, or whenever it can be separated or divided from the acquired entity and sold, transferred, licensed, rented or exchanged, either individually or in combination with a related contract, asset or liability. Such intangibles are amortized over their estimated useful lives unless the estimated useful life is determined to be indefinite. Amortizable intangible assets are being amortized over useful lives of four to eight years. The straight-line method of amortization is used as it has been determined to approximate the use pattern of the assets. Severance Expense We periodically initiate management approved restructuring activities to achieve cost savings through reduced operational redundancies and to strategically position ourselves in the market in response to prevailing economic conditions and associated customer demand. Costs associated with restructuring actions can include severance and related benefit charges. For involuntary separation plans, a liability is recognized when it is probable, reasonably estimable, and communicated to employees. For voluntary separation plans, a liability is recognized when the employee irrevocably accepts the termination. Foreign Currency Translation The financial statements of programs for which the functional currency is not the U.S. dollar are translated into U.S. dollars. Balance sheet accounts are translated at the exchange rate in effect at the end of each period; income statement accounts are translated at the average rates of exchange prevailing during the period. Gains and losses on foreign currency translations are recorded as translation adjustments to other comprehensive (loss) income. Net gains or losses from foreign currency transactions are reported in selling, general and administrative (SG&A) expenses and have historically been immaterial. Receivables Receivables include amounts billed and currently due from customers, amounts unbilled, certain estimated contract change amounts, estimates related to expected award fees, claims or requests for equitable adjustment in negotiation that are probable of recovery, and amounts retained by the customer pending contract completion. Property, Plant and Equipment, Net Property, plant and equipment, net are stated at cost less accumulated depreciation. Major improvements are capitalized at cost while expenditures for maintenance, repairs and minor improvements are expensed. For asset sales or retirements, the assets and related accumulated depreciation and amortization are eliminated from the accounts and any resulting gain or loss is reflected in operating income. Depreciation and amortization is generally computed using either an accelerated or straight-line method and is based on estimated useful lives or lease term as follows: Years Building improvements 3 – 10 Machinery, equipment and vehicles 3 – 12 Furniture, fixtures, and office equipment 3 – 7 Operating Leases Many of our real property lease agreements contain incentives for tenant improvements, rent holidays, or rent escalation clauses. For incentives for tenant improvements, the Company records a deferred rent liability and amortizes the deferred rent over the term of the lease as a reduction to rent expense. For rent holidays and rent escalation clauses during the lease term, the Company records minimum rental expenses on a straight-line basis over the term of the lease. Leasehold improvements capitalized in property, plant and equipment are amortized over the lesser of the remaining life of the lease or the estimated useful life of the improvement. Long-Lived Asset Impairment Long-lived assets are tested for impairment whenever events or changes in circumstances indicate their carrying value may not be recoverable. We assess the recoverability of long-lived assets based on the undiscounted future cash flow the assets are expected to generate and recognize an impairment loss when estimated undiscounted future cash flows expected to result from the use of the asset plus net proceeds expected from disposition of the asset, if any, are less than the carrying value of the asset. When an impairment is identified, we reduce the carrying value of the asset to its estimated fair value based on a discounted cash flow approach or, when available and appropriate, to comparable market values. Stock-Based Compensation We recognize stock-based compensation expense primarily within selling, general and administrative expenses based on the grant date fair values for all share-based awards granted over the requisite service periods of the awards, which is generally equivalent to the vesting terms. Fair Value Measurements We determine fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In measuring fair value, a fair value hierarchy is applied which categorizes and prioritizes the inputs used to estimate fair value into three levels. The fair value hierarchy is based on maximizing the use of observable inputs and minimizing the use of unobservable inputs when measuring fair value. Classification within the fair value hierarchy is based on the lowest level input that is significant to the fair value measurement. There are three levels of the fair value hierarchy. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are other than quoted prices included within level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices (in nonactive markets or in active markets for similar assets or liabilities), inputs other than quoted prices that are observable, and inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 inputs are unobservable inputs for the assets or liabilities. Segment Information Management has concluded that the Company operates as one segment based upon the information used by the chief operating decision maker in evaluating the performance of the Company’s business and allocating resources and capital. Although we perform services worldwide, all of our revenue for the years ended December 31, 2018 , 2017 and 2016 was with the U.S. government. Commitments and Contingencies We record accruals for commitments and loss contingencies when they are probable of occurrence and the amounts can be reasonably estimated. In addition, legal fees are accrued for cases where a loss is probable and the related fees can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount of loss. We review these accruals quarterly and adjust the accruals to reflect the impact of negotiations, settlements, rulings, advice of legal counsel and other updated information. Earnings Per Share We compute earnings per common share on the basis of the weighted average number of common shares, and, where dilutive, common share equivalents, outstanding during the indicated periods. Derivative Instruments Derivative instruments are recognized as either an asset or liability at fair value in our Consolidated Balance Sheets and are classified as current or long-term based on the scheduled maturity of the instrument. Our derivative instruments have been formally designated and qualify as part of a cash flow hedging relationship under applicable accounting standards. The interest rate derivative instruments are adjusted to fair value through accumulated other comprehensive income (loss). If we were to determine that a derivative was no longer highly effective as a hedge, we would discontinue the hedge accounting prospectively. Gains or losses would be immediately reclassified from accumulated other comprehensive income (loss) to earnings relating to hedged forecasted transactions that are no longer probable of occurring. Gains or losses relating to terminations of effective cash flow hedges in which the forecasted transactions would still be probable of occurring would be deferred and recognized consistent with the income or loss recognition of the underlying hedged item. Refer to Note 9, "Derivative Instruments," for additional information regarding our derivative activities.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Standards Issued But Not Yet Effective In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). The objective of ASU 2016-02 is to recognize lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. ASU 2016-02 requires lessees to account for leases as finance leases or operating leases. Both finance and operating leases will result in the lessee recognizing a right-of-use asset and corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset and, for operating leases, the lessee would recognize a straight-line lease expense. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. We have substantially completed our implementation plan. We have revised our controls and processes to address the lease standard and have completed the implementation and data input for our lease accounting software tool. We have elected the package of practical expedients, which, among other things, allows us to carry forward our prior lease classifications under ASC 840. We have not elected, however, to adopt the hindsight practical expedient and are therefore maintaining the lease terms we previously determined under ASC 840. Adoption of the standard is expected to have an impact of approximately $10 million on our Consolidated Balance Sheet for the addition of lease assets and liabilities related to operating leases. ASU 2016-02 also requires expanded disclosure regarding the amounts, timing and uncertainties of cash flows related to our lease portfolio. We are incorporating the collection of relevant data into our processes in preparation for disclosure in 2019. We do not expect ASU 2016-02 to have a material impact on our results of operations or cash flows. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption of ASU 2017-04 is permitted on goodwill impairment tests performed after January 1, 2017. ASU 2017-04 should be applied on a prospective basis. The standard is not expected to have a material impact on our consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). The objective of ASU 2017-12 is to improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities, and to reduce the complexity of and simplify the application of hedge accounting by preparers. The standard is effective in annual periods beginning after December 15, 2018, and interim periods within those periods. The standard is not expected to have a material impact on our consolidated financial statements. Accounting Standards That Were Adopted In 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Several ASUs have been issued since the issuance of ASU 2014-09, which modify certain sections of ASU 2014-09 and are intended to promote a more consistent interpretation and application of the principles outlined in the standard. We adopted the new revenue recognition standard, ASC Topic 606, using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings as of January 1, 2018. See Note 1, "Description of Business and Summary of Significant Accounting Policies," and Note 3, "Revenue" for a discussion of this new standard. Other new pronouncements issued but not effective until after December 31, 2018 are not expected to have a material impact on our financial position, results of operations or cash flows.

Revenue

Revenue	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account for revenue in ASC Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. To determine the proper revenue recognition method, consideration is given as to whether a single contract should be accounted for as more than one performance obligation. For most of our contracts, the customer contracts with us to perform an integrated set of tasks and deliverables as a single service solution, whereby each service is not separately identifiable from other promises in the contract and therefore is not distinct. As a result, when this integrated set of tasks exists, the contract is accounted for as one performance obligation. The vast majority of our contracts have a single performance obligation. Unexercised contract options and indefinite delivery and indefinite quantity (IDIQ) contracts are considered to be separate contracts when the option or IDIQ task order is exercised or awarded. Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are not distinct, and therefore, are accounted for as part of the existing contract. Our performance obligations are satisfied over time as services are provided throughout the contract term. We recognize revenue over time using the input method (e.g., costs incurred to date relative to total estimated costs at completion) to measure progress. Our over time recognition is reinforced by the fact that our customers simultaneously receive and consume the benefits of our services as they are performed. This continuous transfer of control requires that we track progress towards completion of performance obligations in order to measure and recognize revenue. Determining progress on performance obligations requires us to make judgments that affect the timing of revenue recognition. Remaining performance obligations represent firm orders by the customer and excludes potential orders under IDIQ contracts, unexercised contract options and contracts awarded to us that are being protested by competitors with the U.S. Government Accountability Office (GAO) or in the U.S. Court of Federal Claims. The level of order activity related to programs can be affected by the timing of government funding authorizations and their project evaluation cycles. Year-over-year comparisons could, at times, be impacted by these factors, among others. Our contracts are multi-year contracts and typically include an initial period of one year or less with annual one-year (or less) option periods. The number of option periods varies by contract, and there is no guarantee that an option period will be exercised. The right to exercise an option period is at the sole discretion of the U.S. government when we are the prime contractor or of the prime contractor when we are a subcontractor. We expect to recognize a substantial portion of our performance obligations as revenue within the next 12 months. However, the U.S. government or the prime contractor may cancel any contract at any time through a termination for convenience or for cause. Substantially all of our contracts have terms that would permit us to recover all or a portion of our incurred costs and fees for work performed in the event of a termination for convenience. Remaining performance obligations increased by $139.1 million as of December 31, 2018 as compared to December 31, 2017 . We expect to recognize approximately 100% of the remaining performance obligations as of December 31, 2018 as revenue in 2019. Remaining performance obligations as of December 31, 2018 and December 31, 2017 are presented in the following table: Year Ended December 31, (In millions) 2018 2017 Performance Obligations $ 858 $ 719 Contract Estimates Accounting for contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events. These assumptions include labor productivity and availability; the complexity of the services being performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The impact of adjustments in contract estimates on our operating income can be reflected in either revenue or cost of revenue. Cumulative adjustments to operating income for the years ended December 31, 2018 , December 31, 2017 and December 31, 2016 are presented in the following table: Year Ended December 31, (In thousands) 2018 2017 2016 Favorable adjustments $ 14,962 $ 18,256 $ 15,296 Unfavorable adjustments (13,359 ) (6,704 ) (7,837 ) Net favorable adjustments $ 1,603 $ 11,552 $ 7,459 For the years ended December 31, 2018 , 2017 , and 2016 , the net favorable adjustments to operating income increased revenue by $0.8 million, $9.7 million and $7.2 million , respectively. Revenue by Category Generally, the sales price elements for our contracts are cost-plus, cost-reimbursable or firm-fixed-price. We commonly have elements of cost-plus, cost-reimbursable and firm-fixed-price contracts on a single contract. On a cost-plus type contract, we are paid our allowable incurred costs plus a profit, which can be fixed or variable depending on the contract’s fee arrangement, up to funding levels predetermined by our customers. On cost-plus type contracts, we do not bear the risks of unexpected cost overruns, provided that we do not incur costs that exceed the predetermined funded amounts. Most of our cost-plus contracts also contain a firm-fixed-price element. Cost-plus type contracts with award and incentive fee provisions are our primary variable contract fee arrangement. Award fees provide for a fee based on actual performance relative to contractually specified performance criteria. Incentive fees provide for a fee based on the relationship between total allowable and target cost. On most of our contracts, a cost-reimbursable element captures consumable materials required for the program. Typically, these costs do not bear fees. On a firm-fixed-price type contract, we agree to perform the contractual statement of work for a predetermined contract price. A firm-fixed-price type contract typically offers higher profit margin potential than a cost-plus type contract, which is commensurate with the greater levels of risk we assume on a firm-fixed-price type contract. Although a firm-fixed-price type contract generally permits us to retain profits if the total actual contract costs are less than the estimated contract costs, we bear the risk that increased or unexpected costs may reduce our profit or cause us to sustain losses on the contract. Although the overall scope of work required under the contract may not change, profit may be adjusted as experience is gained and as efficiencies are realized or costs are incurred. The following tables present our revenue disaggregated by different categories. Revenue by contract type for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Cost-plus and cost-reimbursable ¹ $ 995,415 $ 818,908 $ 892,842 Firm-fixed-price 283,889 295,880 297,677 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 ¹ Includes time and material contracts Revenue by geographic region in which the contract is performed for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Middle East $ 889,620 $ 871,821 $ 976,586 United States 269,750 168,003 157,161 Europe 119,934 74,964 56,772 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 Revenue by contract relationship for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Prime contractor $ 1,200,726 $ 1,083,485 $ 1,131,773 Subcontractor 78,578 31,303 58,746 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 Revenue by customer for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Army $ 934,427 $ 915,554 $ 1,004,842 Air Force 259,511 177,338 165,611 Navy 38,802 21,896 20,066 Other 46,564 — — Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 Contract Balances The timing of revenue recognition, billings and cash collections results in billed and unbilled accounts receivable (contract assets) and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheets. Amounts are billed as work progresses in accordance with agreed-upon contractual terms at periodic intervals (e.g., biweekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we may receive advances or deposits from our customers, before revenue is recognized, resulting in contract liabilities. These advance billings and payments are not considered significant financing components because they are frequently intended to ensure that both parties are in conformance with the primary contract terms. These assets and liabilities are reported on the Consolidated Balance Sheets on a contract-by-contract basis at the end of each reporting period. During the year ended December 31, 2018 , we recognized $0.9 million in revenue from performance obligations that were satisfied in prior periods. As of December 31, 2018 , we had contract assets of $181.0 million . Refer to Note 7, "Receivables," for additional information regarding the composition of our receivables balances. As of December 31, 2018 , our contract liabilities were insignificant. ASC Topic 606 Impact We adopted ASC Topic 606 on January 1, 2018, using the modified retrospective method with an unfavorable cumulative-effect adjustment of $0.1 million to opening retained earnings. The new ASC Topic 606 guidance was applied to contracts that were not completed as of the effective date of the guidance. During implementation of the standard, we identified performance obligations on the basis of the current version of the executed contract, including any contract modifications since inception; determined the transaction price, including any variable consideration, as of the effective date; and allocated the transaction price determined to the performance obligation identified. ASC Topic 606 differs from former ASC Topic 605 as we no longer recognize adjustments in estimated costs at completion as costs incurred in excess of billings on the balance sheet for firm-fixed price contracts. Adjustments in contract estimates for firm-fixed price contracts will result in more variability to revenue from period to period. The cumulative impact of an adjustment in estimated profit recorded to date on a contract will continue to be recognized in the period it is identified. We determined that certain incentive bonuses met the criteria of incremental costs of acquiring contracts. We capitalize these bonuses and recognize these costs ratably over the terms of the related contracts, including the base year and any subsequent anticipated option years. Prior to the adoption of ASC 606, we recognized these costs as they were incurred. As of December 31, 2018 , we have capitalized $0.4 million and recognized less than $0.1 million of amortization expense related to certain incentive bonuses for the year ended December 31, 2018 . The adoption of ASC Topic 606 had the most significant impact to our accounting for firm-fixed-price contracts. Under ASC Topic 606 guidance, our firm-fixed-price contracts recognize revenue and earnings over time with the continuous transfer of services to the customer, using an input measure (e.g., costs incurred to date relative to total estimated costs at completion) to reflect progress. Adjustments in estimated costs at completion were previously recorded as costs incurred in excess of billings or billings in excess of costs on the Consolidated Balance Sheets. Adjustments in contract estimates for firm-fixed-price contracts are now recorded as unbilled receivables. This change will result in more variability to revenue from period to period. Despite this variability, a firm-fixed-price contract’s cash flows and overall profitability at contract completion are the same. The effects of the adoption of ASC Topic 606, using the modified retrospective method on January 1, 2018, are outlined in the following table: (In thousands) Year Ended December 31, 2017 Impact January 1, 2018 Receivables (unbilled) $ 121,601 $ 10,457 $ 132,058 Costs incurred in excess of billings $ 12,751 $ (12,751 ) $ — Billings in excess of costs $ 3,766 $ (3,766 ) $ — Impact to contract liabilities $ — $ 1,621 $ 1,621 Retained earnings, net of tax $ 117,415 $ (95 ) $ 117,320 The following table reflects the balances of financial statement line items under the ASC Topic 606 revenue recognition guidance compared to the former ASC Topic 605 revenue guidance for the year ended December 31, 2018 : Year Ended December 31, 2018 New Guidance Former Guidance (In thousands) ASC Topic 606 ASC Topic 605 Revenue $ 1,279,304 $ 1,269,560 Cost of revenue $ 1,164,609 $ 1,148,199 Selling, general and administrative expenses $ 66,372 $ 66,372 Operating income $ 48,323 $ 54,989

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We determine the provision for income taxes using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. In assessing the need for a valuation allowance, we look to the future reversal of existing taxable temporary differences, taxable income in carryback years, the feasibility of tax planning strategies and estimated future taxable income. The valuation allowance can be affected by changes to tax laws, changes to statutory tax rates and changes to future taxable income estimates. For the year ended December 31, 2018 , we did not establish or release an additional valuation allowance. We provide for U.S. deferred taxes on the excess of financial reporting basis over the U.S. tax basis for our foreign earnings when we do not plan to reinvest such earnings indefinitely outside the United States. The sources of pre-tax income and the components of income tax expense for the years ended December 31, 2018 , 2017 and 2016 , respectively, are as follows: (in thousands) 2018 2017 2016 Income Components United States $ 41,449 $ 34,386 $ 37,276 Foreign 1,803 2,194 (89 ) Total pre-tax income from continuing operations $ 43,252 $ 36,580 $ 37,187 Income tax expense components Current income tax provision United States-Federal $ 6,305 $ 11,952 $ 15,106 United States-State and local 653 206 311 Foreign 515 758 371 Total current income tax provision 7,473 12,916 15,788 Deferred income tax provision (benefit) United States-Federal (79 ) (35,486 ) (1,733 ) United States-State and local 52 (260 ) (278 ) Foreign 510 (87 ) (245 ) Total deferred income tax provision (benefit) 483 (35,833 ) (2,256 ) Total income tax expense (benefit) $ 7,956 $ (22,917 ) $ 13,532 Effective income tax rate 18.4 % (62.6 )% 36.4 % A reconciliation of the income tax provision at the U.S. statutory rate to the effective income tax rate as reported is as follows: 2018 2017 2016 Tax provision at U.S. statutory rate 21.0 % 35.0 % 35.0 % State and local income tax, net of federal benefit 1.3 % (0.1 )% 0.1 % Foreign taxes 0.3 % (2.5 )% — % Uncertain tax positions 3.4 % — % — % Prior year true-ups 0.4 % 0.3 % — % Foreign derived intangible income deduction (2.9 )% — % — % Credits (0.8 )% — % — % Other 0.4 % 1.7 % 1.3 % Impact of federal rate change (4.7 )% (97.0 )% — % Effective income tax rate 18.4 % (62.6 )% 36.4 % Deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and tax bases of assets and liabilities, applying enacted tax rates in effect for the year in which we expect the differences will reverse. Deferred tax assets and liabilities include the following: (in thousands) 2018 2017 Deferred Tax Assets Costs incurred in excess of billings $ — $ 814 Compensation and benefits 4,444 4,667 Reserves 3,028 2,473 Other 802 854 Net operating losses 295 133 Total deferred tax assets $ 8,569 $ 8,941 Deferred Tax Liabilities Goodwill and intangibles $ (46,832 ) $ (46,890 ) Unbilled receivables (15,112 ) (16,635 ) Property, plant and equipment, net (709 ) 774 Other liabilities (1,192 ) (1,169 ) Total deferred tax liabilities (63,845 ) (63,920 ) Net deferred tax liabilities $ (55,276 ) $ (54,979 ) Uncertain Tax Position A reconciliation of the beginning and ending amount of unrecognized tax benefits as of December 31, 2018 , 2017 and 2016 is as follows: (in thousands) 2018 2017 2016 Unrecognized tax benefits-January 1, $ — $ 429 $ — Additions for: Current year tax positions 1,275 — 429 Prior year tax positions 480 — — Reductions for: Settlements with tax authorities — (429 ) — Prior year tax positions — — — Unrecognized tax benefits-December 31, $ 1,755 $ — $ 429 As of December 31, 2018 , 2017 and 2016 , unrecognized tax benefits from uncertain tax positions were $1.8 million , $0.0 million and $0.4 million , respectively. We generated $1.3 million of unrecognized benefits during the year ended December 31, 2018 related to a current year position, as we are awaiting further guidance on the foreign derived intangible income (FDII) deduction. We generated $0.5 million of unrecognized tax benefits during the year ended December 31, 2018 related to prior year positions as a result of timing differences that were included on our 2017 income tax return that will be reversed and effectively settled with the filing of our 2018 income tax return. We effectively settled $0.4 million of unrecognized tax benefits during the year ended December 31, 2017 with the filing of our 2016 income tax returns during 2017. We classify interest relating to tax matters as a component of interest expense and tax penalties as a component of income tax expense in our Consolidated Statements of Income. During 2018 , 2017 and 2016 , we recognized interest expense related to tax matters of $0.0 million , $0.0 million and $0.0 million , respectively. The Company's earliest open tax year in the U.S. is 2015. Tax Cuts and Jobs Act As the result of the passage of the Tax Cuts and Jobs Act (the Tax Act), on December 22, 2017 the Securities and Exchange Commission released Staff Accounting Bulletin 118 (SAB 118) to provide guidance for companies that had not completed accounting for the income tax effects of the Tax Act prior to the release of their financial statements. SAB 118 provides guidance regarding disclosure on positions taken in the financial reports under three scenarios; (i) where the accounting for the income tax effects is complete, (ii) where the accounting for the income tax effects is incomplete but a reasonable estimate is available, and (iii) where the accounting for the income tax effects is incomplete and a reasonable estimate is not available. We have concluded our analysis of the tax impacts of the Tax Act as of December 31, 2018 with respect to the currently available guidance. In addition to the tax benefit of $35.1 million recorded as of December 31, 2017 , we have recorded an additional benefit of $2.0 million . This additional benefit relates to tax planning with regard to the impact of the federal rate change as included in the filing of the 2017 income tax returns in 2018. We analyzed further the adjustments to our stock compensation deferred tax assets for the changes to Section 162(m) of the Internal Revenue Code, as well as the final calculations of earnings and profits for our transition tax calculation. The changes to both calculations resulting from the additional analysis were minimal and are included in the tax provision. Under GAAP, we are allowed to make an accounting policy choice of either (i) treating taxes due on future U.S. inclusions in taxable income related to global intangible low taxed income (GILTI) as a current-period expense when incurred (the “period cost method”) or (ii) factoring such amounts into a company’s measurement of its deferred taxes (the “deferred method”). We have chosen to account for GILTI under the period cost method as an accounting policy, and therefore the anticipated future expense associated with GILTI is not reflected in our financial statements. As of the close of the SAB 118 period, there are impacts of the Tax Act regarding both federal and state income taxes that we expect will require additional analysis due to the lack of guidance. As such, we will continue to re-evaluate the impacts of these provisions as additional guidance is released. Such guidance may affect our federal and state tax liabilities in the future. Any additional income tax benefit or expense recorded will occur outside of the SAB 118 period. In addition to the Tax Act items analyzed as part of SAB 118, we included the impacts of GILTI and foreign derived FDII as part of the income tax provision. For the year ended December 31, 2018, GILTI resulted in additional income tax expense of $0.1 million and FDII resulted in an income tax benefit of $1.3 million . We have provided for a full reserve on the FDII until the U.S. Treasury issues additional guidance in this area. We will continue to analyze further guidance on these topics as it is released at both the federal and state level.

SENTEL Acquisition

SENTEL Acquisition	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
SENTEL Acquisition	SENTEL ACQUISITION On January 23, 2018, we acquired 100% of the outstanding common stock of SENTEL. In accordance with ASC Topic 805, Business Combinations, we accounted for this transaction using the acquisition method. We conducted valuations of certain acquired assets and assumed liabilities for inclusion in our Consolidated Balance Sheets as of the date of acquisition. Assets that normally would not be recorded in ordinary operations (i.e., intangibles related to contractual relationships) were recorded at their estimated fair values. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. The total net consideration paid for the acquisition was $36.9 million , consisting of the purchase price of $36.0 million and $0.9 million in excess of the working capital requirement agreed upon in the stock purchase agreement entered into among our wholly-owned subsidiary VSC, SENTEL, R&R Enterprises, Inc. and Russell T. Wright. The acquisition was funded by utilizing cash on hand and available capacity from our Amended Revolver (as defined in Note 8, "Debt"). (In thousands) Allocation of Purchase Price Receivables $ 23,339 Property, plant and equipment 810 Goodwill 16,689 Intangible assets 10,500 Other current assets 975 Accounts payable (10,012 ) Other current liabilities (5,446 ) Purchase price, net of cash acquired $ 36,855 We completed the purchase accounting for this acquisition as of December 31, 2018. We recognized two intangible assets related to customer contracts, the backlog and the contract re-competes arising from the acquisition. The fair value of the backlog was $6.5 million and the fair value of the contract re-competes was $4.0 million with amortization periods of 4.0 years and 8.0 years, respectively. The weighted-average remaining useful life of these two intangible assets is 4.7 years. During the year ended December 31, 2018 , we recorded amortization expense of $2.0 million . The amortization expense is included in cost of revenue in our Consolidated Statements of Income. Additionally, we recognized goodwill of $16.7 million arising from the acquisition, which relates primarily to growth opportunities based on a broader service offering in the converging physical and digital infrastructure market, and enhancing our information technology, technical solutions and logistics capabilities, while expanding our client base to customers in the U.S. intelligence community. The goodwill recognized for the SENTEL acquisition is fully deductible for income tax purposes. Through December 31, 2018 , we have recorded acquisition-related costs of $0.8 million , which are included in selling, general and administrative expenses in our Consolidated Statements of Income. We do not believe that any additional costs related to the acquisition will be significant. These costs do not reflect internal non-recurring integration costs. SENTEL’s results of operations for 2018 have been included in our Consolidated Statements of Income for the period subsequent to the acquisition on January 23, 2018. For the year ended December 31, 2018 , SENTEL contributed $112.3 million of revenue. For the year ended December 31, 2017 , SENTEL recognized revenue of $107.0 million . Income from operations before income taxes for SENTEL was insignificant in both years.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Basic earnings per share (EPS) is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted EPS reflects potential dilution that could occur if securities to issue common stock were exercised or converted into common stock. Diluted EPS includes the dilutive effect of share-based compensation outstanding after application of the treasury stock method. Year Ended December 31, (In thousands, except per share data) 2018 2017 2016 Net Income $ 35,296 $ 59,497 $ 23,655 Weighted average common shares outstanding 11,224 11,021 10,714 Add: Dilutive impact of stock options 63 67 97 Add: Dilutive impact of restricted stock units 91 121 163 Diluted weighted average common shares outstanding 11,378 11,209 10,974 Earnings per share Basic $ 3.14 $ 5.40 $ 2.21 Diluted $ 3.10 $ 5.31 $ 2.16 The table below provides a summary of securities that could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the period presented. Year Ended December 31, (In thousands) 2018 2017 2016 Anti-dilutive stock options 3 8 — Anti-dilutive restricted stock units — — 9 Total 3 8 9

Receivables

Receivables	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Receivables	RECEIVABLES Receivables were comprised of the following: December 31, (In thousands) 2018 2017 Billed receivables $ 44,868 $ 50,595 Unbilled receivables (contract assets) 181,009 121,601 Other 6,242 2,799 Receivables $ 232,119 $ 174,995 As of December 31, 2018 and 2017 , all billed receivables are due from the U.S. government, either directly as prime contractor to the U.S. government or as subcontractor to another prime contractor to the U.S. government. Because the Company’s billed receivables are with the U.S. government, the Company does not believe it has a material credit risk exposure. Unbilled receivables are contract assets that represent revenue recognized on long-term contracts in excess of amounts billed as of the balance sheet date. We estimate that approximately $0.9 million of our unbilled receivables as of December 31, 2018 may not be collected within the next twelve months. These amounts relate to the timing of the U.S. government review of indirect rates and contract line item realignments with our customers. Changes in the balance of receivables are primarily due to the timing differences between our performance and customer payments. Refer to Note 3, "Revenue," for a discussion of the impact of the adoption of ASC Topic 606 on our receivables.

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT Senior Secured Credit Facilities Term Loan and Revolver. In September 2014, we and our wholly-owned subsidiary, VSC, entered into a credit agreement with a group of lenders, including JPMorgan Chase Bank, N.A. as administrative agent. The credit agreement was amended as of April 19, 2016, to modify certain financial and negative covenants (as so amended, the Credit Agreement). On November 15, 2017, we and VSC entered into an Amendment and Restatement Agreement (the Amendment Agreement) with a group of lenders including JPMorgan Chase Bank, N.A., as administrative agent, which provides for the amendment and restatement of the Credit Agreement. The Amendment Agreement provides for $200.0 million in senior secured financing, consisting of a $80.0 million five -year term loan facility (the Amended Term Loan) and a $120.0 million five -year senior secured revolving credit facility (the Amended Revolver, and together with the Amended Term Loan, the Amended Credit Facilities). We used $74.6 million from the Amended Term Loan to repay principal and accrued but unpaid interest on the Credit Agreement. We also used $1.8 million from the Amended Term Loan to pay debt financing fees, which are included in "Long-term debt, net" in the Consolidated Balance Sheets and are being amortized as an adjustment to interest expense over the life of the Amendment Agreement. Amortization expense relating to debt issuance costs on the Amendment Agreement was $0.4 million for the year ended December 31, 2018 . Amortization expense relating to debt issuance costs on the Credit Agreement was $1.4 million for the year ended December 31, 2017 , which included $0.8 million of unamortized debt issuance costs as of the date of the Amendment Agreement. Amortization expense relating to debt issuance costs on the Credit Agreement was $ 1.2 million for the year ended December 31, 2016 . All debt issuance amortization costs are included in interest expense in the Consolidated Statements of Income. The Amended Term Loan amortizes in an amount equal to $1.0 million per quarter for the fiscal quarters ending December 31, 2017 through September 30, 2019, $1.5 million per quarter for the fiscal quarters ending December 31, 2019 through September 30, 2020, $2.0 million per quarter for the fiscal quarters ending December 31, 2020 through September 30, 2021, $2.6 million for the fiscal quarters ending December 31, 2021 through September 30, 2022, with the balance of $47.6 million due on November 15, 2022. Amounts borrowed under the Amended Term Loan that are repaid or prepaid may not be re-borrowed. Any unpaid amounts must be repaid by the maturity dates. As of December 31, 2018 , the balance outstanding under the Amended Term Loan was $75.0 million . The Amended Revolver is available for working capital, capital expenditures, and other general corporate purposes. The Amended Revolver will mature and the commitments thereunder will terminate on November 15, 2022. There were no outstanding borrowings under the Amended Revolver at December 31, 2018. Up to $25.0 million of the Amended Revolver is available for the issuance of letters of credit. As of December 31, 2018 , there were six letters of credit outstanding in the aggregate amount of $10.1 million , which reduced our borrowing availability under the Amended Revolver to $109.9 million . The Company's aggregate scheduled maturities of the Amended Term Loan as of December 31, 2018 , are as follows: (In thousands) Payments due 2019 $ 4,500 2020 6,500 2021 8,600 2022 55,400 Total $ 75,000 Guarantees and Collateral . The indebtedness and other obligations under the Amended Credit Facilities are unconditionally guaranteed jointly and severally on a senior secured basis by us and certain of our restricted subsidiaries and are secured, subject to permitted liens and other exceptions, by a first-priority lien on substantially all of our tangible and intangible assets and those of each domestic guarantor. Voluntary Prepayments . We may voluntarily prepay the Amended Term Loan in whole or in part at any time without premium or penalty, subject to the payment of customary breakage costs under certain conditions. Voluntary prepayments of the Amended Term Loan will be applied to the remaining installments thereof as directed by us. We may reduce the commitments under the Amended Revolver in whole or in part at any time without premium or penalty. Covenants . The Amended Credit Facilities contain customary covenants, including covenants that, under certain circumstances and subject to certain qualifications and exceptions: limit or restrict our ability to incur additional indebtedness; merge, dissolve, liquidate or consolidate; make acquisitions, investments, advances or loans; dispose of or transfer assets; pay dividends; redeem or repurchase certain debt; and enter into certain restrictive agreements. As of December 31, 2018 , the maximum amount of dividends we could pay was $19.3 million . In addition, we are required to comply with (a) a maximum ratio of total consolidated indebtedness to consolidated earnings before interest, tax, depreciation and amortization (EBITDA) of 3.00 to 1.00 (or 3.25 to 1.00 for the 12 months following a qualified acquisition), and (b) a minimum ratio of consolidated EBITDA to consolidated interest expense (net of cash interest income) of 4.50 to 1.00 . As of December 31, 2018 , we had a ratio of total consolidated indebtedness to EBITDA of 1.25 to 1.00 and a ratio of consolidated EBITDA to consolidated interest expense of 11.61 to 1.00 . We were in compliance with all covenants related to the Amended Credit Facilities as of December 31, 2018 . Interest Rates and Fees . Outstanding borrowings under the Amended Credit Facilities accrue interest, at our option, at a per annum rate of (i) LIBOR plus the applicable margin, which ranges from 1.75% to 2.50% depending on the leverage ratio, or (ii) a base rate plus the applicable margin, which ranges from 0.75% to 1.50% depending on the leverage ratio. The interest rate under the Amended Credit Facilities at December 31, 2018 was 4.53% . We pay a commitment fee on the undrawn portion of the Amended Revolver ranging from 0.30% to 0.45% , depending on the leverage ratio. Carrying Value and Fair Value . The fair value of the Amended Credit Facilities approximates the carrying value as of December 31, 2018 because the debt bears interest at a floating rate of interest. The fair value is based on observable inputs of interest rates that are currently available to us for debt with similar terms and maturities for non-public debt. Carrying values and fair values of the Amended Term Loan on the Consolidated Balance Sheet as of December 31, 2018 were as follows: December 31, 2018 (In thousands) Carrying Amount Fair Value Short-term debt $ 4,500 $ 4,500 Long-term debt 70,500 70,500 Total debt 75,000 $ 75,000 Debt financing fees (1,363 ) Total debt with debt financing fees $ 73,637 Carrying values and fair values of the Amended Term Loan on the Consolidated Balance Sheet as of December 31, 2017 were as follows: December 31, 2017 (In thousands) Carrying Amount Fair Value Short-term debt $ 4,000 $ 4,000 Long-term debt 75,000 75,000 Total debt 79,000 $ 79,000 Debt financing fees (1,789 ) Total debt with debt financing fees $ 77,211

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS Interest Rate Derivative Instruments We are exposed to the risk that our earnings and cash flows could be adversely impacted due to fluctuations in interest rates. We will periodically enter into interest rate swaps to manage interest costs in which we agree to exchange, at specified intervals, the difference between variable and fixed interest amounts calculated by reference to an agreed-upon notional amount. Derivative instruments are not used for trading purposes or to manage exposure to changes in interest rates for investment securities, and our outstanding derivative instruments do not contain credit risk related contingent features. Collateral is generally not required. In December 2017, we terminated the derivative instruments entered into during May 2016 and May 2015 and entered into a new derivative instrument to hedge a portion of our exposure to interest rate risk under the Amended Term Loan. As a result of terminating the derivatives, we received $0.4 million in cash for the fair value of the derivative instruments, reduced other current and other non-current assets by $0.4 million , and reduced accumulated other comprehensive loss by $0.4 million on the Consolidated Balance Sheet as of December 31, 2017. In addition, we decreased interest expense on the Consolidated Statements of Income by $0.4 million for the year ended December 31, 2017. No other derivative gains or losses were recognized in 2017. In addition to the new hedge entered into during December 2017, during February 2018, and April 2018 we entered into additional derivative instruments to hedge a portion of our exposure to interest rate risk under the variable-rate portion of the Amended Term Loan (the interest rate swaps). The interest rate swaps are designated and qualify as effective cash flow hedges. The contracts, with a notional amount totaling $56.4 million at December 31, 2018 and expiration dates through November 2022, are recorded at fair value. The interest rate swaps are measured at fair value on a recurring basis and are determined using the income approach based on a discounted cash flow model to determine the present value of future cash flows over the remaining term of the contract incorporating observable market inputs such as prevailing interest rates as of the reporting date (Level 2). Changes in fair value of the interest rate swap are recorded, net of tax, as a component of accumulated other comprehensive loss in the accompanying Consolidated Balance Sheets. We reclassify the effective gain or loss from accumulated other comprehensive loss, net of tax, to interest expense on the Consolidated Statements of Income as the interest expense is recognized on the related debt. The ineffective portion of the change in fair value of the interest rate swap, if any, is recognized directly in earnings in interest expense. Net interest rate derivative losses of approximately $0.2 million were reclassified from accumulated other comprehensive loss to interest expense in our Consolidated Statements of Income during 2018. The following table summarizes the amount at fair value and location of the derivative instrument in the Consolidated Balance Sheet as of December 31, 2018 : Fair Value (In thousands) Balance sheet caption Amount Interest rate swap designated as cash flow hedge Other current assets $ 121 Interest rate swap designated as cash flow hedge Other non-current assets $ 104 The following table summarizes the amount at fair value and location of the terminated derivative instruments in the Consolidated Balance Sheet as of December 31, 2017 : Fair Value (In thousands) Balance sheet caption Amount Interest rate swap designated as cash flow hedge Other accrued liabilities $ 127 Interest rate swap designated as cash flow hedge Other non-current assets $ 60 By utilizing interest rate swaps, we are exposed to credit-related losses in the event that the counterparty fails to perform under the terms of the derivative contract. To mitigate this risk, we entered into the interest rate swap with a major financial institution based upon credit ratings and other factors. We regularly assess the creditworthiness of the counterparty. As of December 31, 2018 , the counterparty to the interest rate swap had performed in accordance with its contractual obligations. Both the counterparty credit risk and our credit risk were considered in the fair value determination. Foreign Currency Derivative Instrument We transact business in various foreign countries and are therefore exposed to foreign currency exchange rate risk that impacts the reported U.S. dollar amounts of revenues, costs, and certain foreign currency monetary assets and liabilities. In order to manage exposure to fluctuations in foreign currency and to reduce the volatility in cash flows and earnings caused by fluctuations in foreign exchange rates, we entered into forward contracts to buy and sell foreign currency. By policy, we do not enter into these contracts for trading purposes or speculation. As of December 31, 2018, we had economically hedged certain portions of our foreign currency risk in anticipated transactions using derivative instruments with expiration dates through May 2020. Counterparty default risk is considered low because the forward contracts that we entered into are over-the-counter instruments transacted with highly-rated financial institutions. We were not required to, and did not, post collateral as of December 31, 2018. Our foreign currency derivative instruments are recorded at fair value as a derivative asset or liability in the Consolidated Balance Sheets. The foreign currency forward contracts are measured at fair value on a recurring basis and are determined using the income approach based on a discounted cash flow model to determine the present value of future cash flows over the remaining term of the contract incorporating observable market inputs such as prevailing foreign currency exchange rates as of the reporting date (Level 2). Forward contracts acquired prior to December 31, 2017 were not designated as hedging instruments and changes in fair value of these contracts were recognized within selling, general and administrative expense in the Consolidated Statements of Income. Forward contracts entered into after December 31, 2017 were designated and qualify as hedging instruments. Changes in the fair value of these instruments are recorded, net of tax, as a component of accumulated other comprehensive loss in the accompanying Consolidated Balance Sheets. We reclassify the effective gain or loss from accumulated other comprehensive loss, net of tax, within selling, general and administrative expense on the Consolidated Statements of Income as the forward contracts are settled. The ineffective portion of the change in fair value of the forward contracts, if any, is recognized directly in earnings in selling, general and administrative expense. In the Consolidated Statements of Cash Flows, we classify cash flows from foreign currency derivative instruments at settlement in the same category as the cash flows from the related hedged item, generally within cash provided by operating activities. During 2018, net foreign currency derivative losses of less than $0.1 million were recognized in selling, general and administrative expense. These losses related to our non-designated hedges, all of which were settled in 2018. During 2017 no foreign currency derivative gains or losses were recognized in our Consolidated Statements of Income. The following table summarizes the amount at fair value and location of the derivative instruments used for our forward contract hedges in the Consolidated Balance Sheet as of December 31, 2018. Fair Value (In thousands) Balance sheet caption Amount Foreign currency forward contracts designated as cash flow hedge Other accrued liabilities $ 351 Foreign currency forward contracts designated as cash flow hedge Other non-current liabilities $ 7 At December 31, 2018, the notional amount of our outstanding foreign currency foreign exchange contracts, all of which were for the exchange of U.S. dollars and Euros, was $7.4 million .

Composition of Certain Financia

Composition of Certain Financial Statement Captions	12 Months Ended
	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Composition of Certain Financial Statement Captions	COMPOSITION OF CERTAIN FINANCIAL STATEMENT CAPTIONS The following tables present financial information underlying certain balance sheet captions. Compensation and other employee benefits Compensation and other employee benefits are affected by short-term fluctuations in the timing of payments and were comprised of the following at December 31: (In thousands) 2018 2017 Accrued salaries and wages $ 20,435 $ 21,879 Accrued bonus 7,261 4,210 Accrued employee benefits 14,094 13,215 Total $ 41,790 $ 39,304 Other accrued liabilities Other accrued liabilities were comprised of the following at December 31: (In thousands) 2018 2017 Workers' compensation, auto and general liability reserve $ 5,369 $ 4,615 Contract related reserves 7,133 7,426 Other accrued liabilities 9,801 7,168 Total $ 22,303 $ 19,209

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Plant, Property and Equipment, Net	PROPERTY, PLANT AND EQUIPMENT, NET Property, plant and equipment, net consisted of the following at December 31 : (In thousands) 2018 2017 Buildings and improvements $ 1,168 $ 5,197 Machinery and equipment 14,242 5,556 Furniture, fixtures and office equipment 5,877 4,895 Property, plant and equipment, gross 21,287 15,648 Less: accumulated depreciation and amortization (7,868 ) (11,915 ) Property, plant and equipment, net $ 13,419 $ 3,733 Depreciation expense of property, plant and equipment was $1.8 million , $1.7 million and $1.9 million in 2018 , 2017 , and 2016 , respectively.

Leases and Rentals

Leases and Rentals	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Leases and Rentals	LEASES AND RENTALS Operating Leases The Company leases certain offices, buildings, automobiles, computers, land and other equipment under operating leases. As of December 31, 2018, such leases expire at various dates through 2028 and may include renewal and payment escalation clauses. The Company often pays maintenance, insurance and tax expense related to leased assets. Rental expenses under our operating leases were approximately $6.3 million , $3.5 million and $6.0 million for 2018 , 2017 and 2016 , respectively. Future operating lease payments under non-cancellable operating leases with an initial term in excess of one year as of December 31, 2018 are shown below: (In thousands) Payments due 2019 $ 3,480 2020 2,986 2021 1,730 2022 894 2023 893 2024 and later 3,872 Total minimum lease payments $ 13,855

Post Employment Benefit Plans

Post Employment Benefit Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Post Employment Benefit Plans	POST EMPLOYMENT BENEFIT PLANS We sponsor two defined contribution savings plans, with the addition of SENTEL, which allow employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. The Company matches a percentage of the employee contributions up to certain limits of employee base pay. Our portion of the matching contributions charged to income amounted to $5.2 million and $3.0 million for the years ended December 31, 2018 and 2017 , respectively. On September 11, 2014, our Board of Directors adopted and approved the Vectrus Systems Corporation Excess Savings Plan (the Excess Savings Plan). Since federal law limits the amount of compensation that can be used to determine employee and employer contribution amounts to our tax-qualified plans, we established the Excess Savings Plan to allow for Company contributions based on an eligible employee's base salary in excess of these limits. No employee contributions are permitted. All balances under the Excess Savings Plan are maintained on the books of the Company and credits and deductions are made to the accumulated savings under the plan based on the earnings or losses attributable to a stable value fund as defined in the Excess Savings Plan. Benefits will be paid in a lump sum generally in the seventh month following the date on which the employee's separation from service occurs. Employees are 100% vested at all times in any amounts credited to their accounts. As of both December 31, 2018 and December 31, 2017, we had accrued $0.1 million of contributions under the Excess Savings Plan. On November 9, 2016, the Compensation Committee approved an amendment and restatement of the Company’s Senior Executive Severance Pay Plan (as amended and restated, the “Amended Plan”), effective as of November 9, 2016. The Amended Plan removed (i) a provision that disallowed severance pay in the event of a termination of the executive’s employment by the Company with a scheduled termination date after the executive’s “Normal Retirement Date” (i.e., the first of the month which coincides with or follows the executive’s 65th birthday) and (ii) a provision that used the executive’s Normal Retirement Date in determining the maximum period of time for which severance pay is calculated. The Amended Plan did not change the schedule of severance pay. Termination benefits offered under the Company’s Amended Plan are other post employment benefits as defined by ASC 712-10 - Compensation - Nonretirement Postemployment Benefits. Benefits under the Amended Plan vest or accumulate with the employee’s years of service; however, the payment of benefits is not probable and the Company does not have the ability to reliably estimate when there will be an involuntary termination without cause under the Amended Plan. Accordingly, the Company does not accrue a benefit obligation for severance costs under the Amended Plan over the duration of executive employment.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION The Company maintains an equity incentive plan, the 2014 Omnibus Incentive Plan, as amended and restated effective as of May 13, 2016 (the 2014 Omnibus Plan), to govern awards granted to Vectrus employees and directors, including nonqualified stock options (NQOs), restricted stock units (RSUs), total shareholder return (TSR) awards and other awards. We account for NQOs and stock-settled RSUs as equity-based compensation awards. TSR awards, described below, and cash-settled RSUs are accounted for as liability-based compensation awards. The maximum number of shares of the Company's common stock authorized for issuance under the 2014 Omnibus Plan is 2.6 million shares. As of December 31, 2018 , there were 1.1 million shares remaining available for future awards. Stock-based compensation expense and the associated tax benefits impacting our Consolidated Statements of Income were as follows: Year Ended December 31, (In thousands) 2018 2017 Compensation costs for equity-based awards $ 3,490 $ 2,863 Compensation costs for liability-based awards 606 1,604 Total compensation costs, pre-tax $ 4,096 $ 4,467 Future tax benefit $ 888 $ 965 Liability-based awards are revalued at the end of each reporting period to reflect changes in fair value. The Company paid $1.0 million and $0.1 million related to liability-based compensation awards during the years ended December 31, 2018 and 2017 , respectively. At December 31, 2018 , total unrecognized compensation costs related to equity-based awards and liability-based awards were $4.1 million and $1.3 million , respectively, which are expected to be recognized ratably over a weighted average period of 1.75 years and 1.69 years, respectively. Non-Qualified Stock Options NQOs vest in one-third increments on the first, second and third anniversaries of the grant date and expire 10 years from the date of grant. A summary of the status of our NQOs as of December 31, 2018 , 2017 and 2016 and changes during the years then ended is presented below: Year Ended December 31, 2018 2017 2016 (In thousands, except per share data) Shares Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share Outstanding at January 1, 325 $22.74 384 $21.47 486 $19.25 Granted — $0.00 75 $22.82 87 $20.06 Exercised (73 ) $21.87 (110 ) $18.41 (158 ) $13.63 Forfeited, canceled or expired (1 ) $20.62 (24 ) $22.61 (31 ) $22.51 Outstanding at December 31, 251 $23.00 325 $22.74 384 $21.47 Options exercisable 184 $23.35 201 $22.57 214 $20.35 The following table summarizes information about NQOs outstanding and exercisable as of December 31, 2018 : (In thousands, except per share data) Options Outstanding Options Exercisable Range of Exercise Prices Per Share Number Weighted Average Remaining Contractual Life (In Years) Weighted Average Exercise Price Per Share Aggregate Intrinsic Value Number Weighted Average Remaining Contractual Life (In Years) Weighted Average Exercise Price Per Share Aggregate Intrinsic Value $12.94 - $21.98 172 6.80 $ 20.25 $ 250 112 6.24 $ 19.69 $ 211 $22.16 - $32.49 79 6.12 29.00 — 72 5.90 29.03 — Total options and aggregate intrinsic value 251 6.58 $ 23.00 $ 250 184 6.11 $ 23.35 $ 211 The aggregate intrinsic value in the preceding table represents the total pre-tax intrinsic value, based on our closing stock price of $21.58 per share on December 31, 2018 , which would have been received by the option holders if all option holders had exercised their options as of that date. There were approximately 0.1 million exercisable options "out of the money" as of December 31, 2018 . The aggregate intrinsic value of options exercised during the years ended December 31, 2018 , 2017 and 2016 was $0.1 million , $1.4 million and $1.6 million , respectively. As of December 31, 2018 , the total number of stock options expected to vest (including those that have already vested) was 0.3 million . These stock options have a weighted-average exercise price of $23.00 per share, an aggregate intrinsic value of $0.2 million and a weighted average remaining contractual life of 6.6 years . The fair value of stock options is determined on the date of grant utilizing a Black-Scholes valuation model. No stock options were granted in 2018. The following weighted-average assumptions were utilized in deriving the fair value for NQOs: Year Ended December 31, 2017 2016 Expected volatility 30.8 % 30.2 % Expected life (in years) 7 7 Risk-free rates 2.30 % 1.69 % Weighted-average grant date fair value per share $ 8.48 $ 7.06 Black-Scholes model volatility is based on daily average volatility of our peer group over seven years , which is consistent with the expected term. Peer group companies were selected from companies within the aerospace and defense industry that most closely match our business, including size, diversification, and customer base. The expected term of the stock option represents the estimated period of time until exercise and is based on the vesting period of the award and the estimated exercise patterns of employees. The risk-free rate is based on the U.S. Treasury stripped coupon rates with maturities corresponding to the expected term of 7 years, measured as of the grant date. Restricted Stock Units The fair value of RSUs is determined based on the closing price of Vectrus common stock on the date of the grant. In general, under the 2014 Omnibus Plan, for employee RSUs granted in 2014 and after, one-third of the award vests on each of the three anniversary dates following the grant date. Director RSUs are granted on the date of the annual meeting and vest the business day immediately prior to the next annual meeting. RSUs have no voting rights. If an employee leaves the Company prior to vesting, whether through resignation or termination for cause, the RSUs are forfeited. If an employee retires or is terminated by the Company other than for cause, all or a pro rata portion of the RSUs may vest. The table below provides a roll-forward of outstanding RSUs for the years ended December 31, 2018, 2017, and 2016. Year Ended December 31, 2018 2017 2016 (In thousands, except per share data) Shares Weighted Average Grant Date Fair Value Per Share Shares Weighted Average Grant Date Fair Value Per Share Shares Weighted Average Grant Date Fair Value Per Share Outstanding at January 1, 221 $ 23.58 285 $ 23.01 350 $22.47 Granted 163 $ 33.08 144 $ 23.74 181 $21.25 Vested (110 ) $ 24.93 (171 ) $ 23.18 (206 ) $20.56 Forfeited or canceled (17 ) $ 25.54 (37 ) $ 21.69 (40 ) $22.68 Outstanding at December 31, 257 $ 28.90 221 $ 23.58 285 $23.01 The total grant date fair value of RSUs that vested during the years ended December 31, 2018 , 2017 and 2016 was $3.3 million , $4.5 million and $3.4 million , respectively. Total Shareholder Return Awards TSR awards are performance-based cash awards that are subject to a three -year performance period. Any payments earned are made in cash following completion of the performance period according to the achievement of specified performance goals. During the years ended December 31, 2018 , 2017 , and 2016 , we granted TSR awards with aggregate target TSR values of $2.2 million , $1.5 million , and $1.5 million , respectively. The fair value of TSR awards is measured quarterly and is based on the Company’s performance relative to the performance of the Aerospace and Defense Companies in the S&P 1500 Index. Depending on the Company’s performance during the three -year performance period, payments can range from 0% to 200% of the target value. For the years ended December 31, 2018 , 2017, and 2016, we recorded $0.3 million , $1.0 million and $0.6 million , respectively, in compensation expense related to TSR awards. Payments of $0.5 million were made in January 2019 for the 2016 TSR awards, and payments of $0.6 million were made in January 2018 for the 2015 TSR awards. Payments, if any, for the 2017 and 2018 TSR awards are expected to be made in January 2020 and January 2021, respectively. As of December 31, 2018 and 2017 , we had $1.5 million and $1.9 million , respectively, recorded as a liability related to TSR awards in compensation and other employee benefits and other non-current liabilities on the Consolidated Balance Sheets.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS' EQUITY In connection with the Spin-off, each of the shareholders of our Former Parent received one share of Vectrus common stock for every 18 shares of common stock of our Former Parent held on the record date resulting in the distribution of 10.5 million shares of Vectrus common stock to our Former Parent shareholders. As of December 31, 2018 , our authorized capital was comprised of 100.0 million shares of common stock and 10.0 million shares of preferred stock. At December 31, 2018 , there were 11.3 million shares of common stock issued and outstanding. No preferred stock was issued and outstanding at December 31, 2018 and 2017 . We issue shares of our common stock in connection with our 2014 Omnibus Plan. There are 2.6 million shares of common stock authorized under this plan. At December 31, 2018 , we had a remaining balance of 1.1 million shares of common stock available for future grants under this plan. Any shares related to awards that terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of shares, are settled in cash in lieu of shares or are exchanged with the Committee's permission for awards not involving shares and are available again for grant under the 2014 Omnibus Plan.

Agreements With Former Parent

Agreements With Former Parent	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Agreements With Former Parent	AGREEMENTS WITH FORMER PARENT Agreements with Former Parent Following the Spin-off, Vectrus and our Former Parent began operating independently of each other, and neither has any ownership interest in the other. In order to govern certain ongoing relationships between Vectrus and our Former Parent following the Spin-off and to provide mechanisms for an orderly transition, on September 27, 2014, Vectrus and our Former Parent executed various agreements that govern the ongoing relationships between the companies after the Spin-off and provide for the allocation of employee benefits, income taxes, and certain other liabilities and obligations attributable to periods prior to the Spin-off. The executed agreements include a Distribution Agreement, Employee Matters Agreement, Tax Matters Agreement, Master Transition Services Agreement, Technology License Agreement and Transitional Trademark License Agreement.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES General From time to time, we are involved in legal proceedings that are incidental to the operation of our business. Some of these proceedings seek remedies relating to employment matters, matters in connection with our contracts and matters arising under laws relating to the protection of the environment. Additionally, U.S. government customers periodically advise the Company of claims and penalties concerning certain potential disallowed costs. When such findings are presented, Vectrus and the U.S. government representatives engage in discussions to enable Vectrus to evaluate the merits of these claims as well as to assess the amounts being claimed. Where appropriate, provisions are made to reflect probable losses related to the matters raised by the U.S. government representatives. Such assessments, along with any assessments regarding provisions for legal proceedings, are reviewed on a quarterly basis for sufficiency based on the most recent information available to us. We have estimated and accrued $7.8 million and $5.8 million as of December 31, 2018 and 2017 , respectively, in other accrued liabilities in the Consolidated Balance Sheets for legal proceedings and for claims with respect to our government contracts as discussed below, including years where the U.S. government has not completed its incurred cost audits. Although the ultimate outcome of any legal matter or claim cannot be predicted with certainty, based on present information, including our assessment of the merits of the particular claim, we do not expect that any asserted or unasserted legal or contractual claims or proceedings, individually or in the aggregate, will have a material adverse effect on our cash flow, results of operations or financial condition. Legal Proceedings We recently settled a class action employment lawsuit that was initiated in the United States District Court for the Western District of Washington in April 2010 against the predecessor of our Former Parent by individuals who worked on a particular contract in Kuwait after April 12, 2009. The plaintiffs alleged a breach of employment contract by the predecessor of our Former Parent due to an alleged violation of Kuwait labor law. Although we disputed the liability, the parties have negotiated a settlement, the terms of which include a settlement fund of up to $3.75 million , plus payroll taxes for wages paid to class members. The settlement fund includes the judge’s award of attorney’s fees, costs and class representative fees, with the remainder available to eligible class members pursuant to an allocation formula. The Company received final approval of the settlement by the District Court following a fairness hearing on October 16, 2018. Payments to eligible class members were made on February 1, 2019. U.S. Government Contracts, Investigations and Claims We have U.S. government contracts that are funded incrementally on a year-to-year basis. Changes in government policies, priorities or funding levels through agency or program budget reductions by the U.S. Congress or executive agencies could have a material adverse effect on our financial condition or results of operations. Furthermore, our contracts with the U.S. government may be terminated or suspended by the U.S. government at any time, with or without cause. Such contract suspensions or terminations could result in unreimbursable expenses or charges or otherwise adversely affect our financial condition and results of operations. Departments and agencies of the U.S. government have the authority to investigate various transactions and operations of the Company, and the results of such investigations may lead to administrative, civil or criminal proceedings, the ultimate outcome of which could be fines, penalties, repayments or compensatory or treble damages. U.S. government regulations provide that certain findings against a contractor may lead to suspension or debarment from future U.S. government contracts or the loss of export privileges for a company or an operating division or subdivision. Suspension or debarment could have a material adverse effect on the Company because of its reliance on U.S. government contracts. U.S. government agencies, including the Defense Contract Audit Agency (DCAA), the Defense Contract Management Agency (DCMA) and others, routinely audit and review our performance on government contracts, indirect rates and pricing practices, and compliance with applicable contracting and procurement laws, regulations and standards. Accordingly, costs billed or billable to U.S. government customers are subject to potential adjustment upon audit by such agencies. The U.S. government agencies also review the adequacy of our compliance with government standards for our business systems, including our accounting, earned value management, estimating, materials management and accounting, purchasing, and property management systems. As a result of final indirect rate negotiations between the U.S. government and our Former Parent, we may be subject to potential adjustments to costs previously allocated by our Former Parent to our business, which was formerly Exelis’ Mission Systems Business, from 2007 through 2014. Because we do not participate in indirect rate negotiations between the U.S. government and our Former Parent, we cannot reasonably predict the likelihood of such adjustments or the ultimate responsible party. We have recently been in discussions with our Former Parent regarding the negotiated adjustments for 2007-2012 and believe our potential cumulative liability for these years is insignificant. We currently do not have insight into the 2013 and 2014 negotiations or potential adjustments.

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) The following table comprises selected financial data for the years ended December 31, 2018 and 2017 : 2018 QUARTERS 2017 QUARTERS (In thousands, except per share data) 1st 2nd 3rd 4th 1st 2nd 3rd 4th Total revenue $ 320,516 $ 321,132 $ 308,095 $ 329,561 $ 290,063 $ 259,318 $ 269,625 $ 295,782 Gross Profit 26,466 29,068 29,131 30,030 25,362 25,735 24,406 26,445 Operating income 8,671 12,998 14,006 12,648 11,649 9,204 10,090 10,277 Net income 6,111 9,195 9,866 10,124 6,668 5,461 5,800 41,568 Basic earnings per share $ 0.55 $ 0.82 $ 0.88 $ 0.90 $ 0.61 $ 0.50 $ 0.52 $ 3.77 Diluted earnings per share $ 0.54 $ 0.81 $ 0.86 $ 0.89 $ 0.60 $ 0.49 $ 0.51 $ 3.70 Weighted average number of shares outstanding Basic 11,146 11,235 11,248 11,262 10,909 10,987 11,075 11,026 Diluted 11,338 11,383 11,406 11,369 11,075 11,191 11,272 11,234

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Our Business	Our Business Vectrus, Inc. is a leading provider of services to the U.S. government worldwide. We operate as one segment and offer facility and logistics services and information technology and network communications services. Vectrus was incorporated in the State of Indiana on February 4, 2014. On September 27, 2014, Exelis Inc. (Exelis) completed the spin-off (the Spin-off) of Vectrus and Vectrus became an independent, publicly traded company. The Consolidated Financial Statements reflect the consolidated operations of Vectrus as a separate stand-alone entity. Unless the context otherwise requires, references in these notes to "Vectrus", "we," "us," "our," "the Company" and "our Company" refer to Vectrus, Inc. References in these notes to Exelis or "Former Parent" refer to Exelis Inc., an Indiana corporation, and its consolidated subsidiaries (other than Vectrus). Exelis was acquired by Harris Corporation in May 2015.
Equity Investments	Equity Investment In 2011, we entered into a joint venture agreement with Shaw Environmental & Infrastructure, Inc., which is now Aptim Federal Services LLC. Pursuant to the joint venture agreement, High Desert Support Services, LLC (HDSS) was established to pursue and perform work on the Ft. Irwin Installation Support Services Contract, which was awarded to HDSS in October 2012. We account for our investment in HDSS under the equity method as we have the ability to exercise significant influence, but do not hold a controlling interest. We record our proportionate 40% share of income or losses, which has historically been insignificant, in the Consolidated Statements of Income. Our investment in HDSS is recorded in other non-current assets in the Consolidated Balance Sheets. When we receive cash distributions from HDSS, the cash distribution is compared to cumulative earnings and any excess is recorded as a distribution from equity investment in the Consolidated Statements of Cash Flows. Any remaining cash distribution is recorded in other assets in the Consolidated Statements of Cash Flows.
Principles of Consolidation	Principles of Consolidation Vectrus consolidates companies in which it has a controlling financial interest. All intercompany transactions and balances have been eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Estimates are revised as additional information becomes available. Estimates and assumptions are used for, but not limited to, revenue recognition, income taxes, fair value and impairment of goodwill and valuation of assets and certain contingent liabilities. Actual results could differ from these estimates.
Reclassifications	Reclassifications Certain reclassifications have been made to the presentation of amounts in our Consolidated Balance Sheet as of December 31, 2017 to conform to the current year presentation. Specifically, certain intangible assets were reclassified from non-current assets and are now presented separately on our Consolidated Balance Sheets.
Revenue Recognition	Revenue Recognition In 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606). Several ASUs have been issued since the issuance of ASU 2014-09, which modify certain sections of ASU 2014-09 and are intended to promote a more consistent interpretation and application of the principles outlined in the standard. We adopted the new standard, Accounting Standards Codification (ASC) Topic 606, on January 1, 2018, using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings. See Note 3, "Revenue," for the quantification of these adjustments. As a defense contractor engaging in long-term contracts, substantially all of our revenue is derived from long-term service contracts. The unit of account for revenue in ASC Topic 606 is a performance obligation. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. To determine the proper revenue recognition method, consideration is given as to whether a single contract should be accounted for as more than one performance obligation. For most of our contracts, the customer contracts with us to perform an integrated set of tasks and deliverables as a single service solution, whereby each service is not separately identifiable from other promises in the contract and therefore is not distinct. As a result, when this integrated set of tasks exists, the contract is accounted for as one performance obligation. The vast majority of our contracts have a single performance obligation. Unexercised contract options and indefinite delivery and indefinite quantity (IDIQ) contracts are considered to be separate contracts when the option or IDIQ task order is exercised or awarded. Our performance obligations are satisfied over time as services are provided throughout the contract term. We recognize revenue over time using the input method (e.g., costs incurred to date relative to total estimated costs at completion) to measure progress. Our over time recognition is reinforced by the fact that our customers simultaneously receive and consume the benefits of our services as they are performed. For most U.S. Government contracts, this continuous transfer of control to the customer is supported by clauses in the contract that allow the customer to unilaterally terminate the contract for convenience, pay us for costs incurred plus a reasonable profit and take control of any work in process. This continuous transfer of control requires that we track progress towards completion of performance obligations in order to measure and recognize revenue. Accounting for contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events. These assumptions include labor productivity and availability; the complexity of the services being performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including award and incentive fees, inspection of supplies and services, and fluctuation in allowable indirect reimbursable costs. We include award or incentive fees in the estimated transaction price when there is certainty and a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. The inspection of supplies and services is a factor because the U.S. government can reduce the transaction price if we do not perform the services in compliance with contract requirements. The fluctuation of allowable indirect reimbursable costs is a factor because the U.S. government has the right to review our accounting records and retroactively adjust the reimbursable rate. Any prior adjustments are reflected in the U.S. government reserve amounts recorded in our financial statements. We estimate variable consideration at the most likely amount that we expect to be entitled to receive. Refer to Note 17, "Commitments and Contingencies" for additional information regarding U.S. government reserve amounts. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract estimates regularly. We recognize adjustments in estimated profit on executed contracts cumulatively. The impact of the adjustments on profit recorded to date is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the quarter it is identified. Contracts are often modified to account for changes in contract specifications and requirements. If the modification either creates new enforceable rights and obligations or changes the existing enforceable rights and obligations, the modification will be treated as a separate contract. Historically, our contract modifications have not been distinct from the existing contract and have been accounted for as if they were part of that existing contract. The impact of adjustments in contract estimates on our operating income can be reflected in either revenue or cost of revenue. Cumulative adjustments for the years ended December 31, 2018 , 2017 and 2016 are presented in the following table: Year Ended December 31, (In thousands) 2018 2017 2016 Favorable adjustments $ 14,962 $ 18,256 $ 15,296 Unfavorable adjustments (13,359 ) (6,704 ) (7,837 ) Net favorable adjustments $ 1,603 $ 11,552 $ 7,459 The timing of revenue recognition, billings and cash collections results in billed and unbilled accounts receivable (contract assets) and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheets. Amounts are billed as work progresses in accordance with agreed-upon contractual terms at periodic intervals (e.g., biweekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we may receive advances or deposits from our customers, before revenue is recognized, resulting in contract liabilities. These advance billings and payments are not considered significant financing components because they are frequently intended to fund current operating expenses under the contract. These assets and liabilities are reported on the Consolidated Balance Sheets on a contract-by-contract basis at the end of each reporting period. Our primary customer is the U.S. Department of Defense, with a high concentration in the U.S. Army. For the year ended December 31, 2018 , 2017 and 2016, we had total revenue of $1.3 billion , $1.1 billion , and $1.2 billion , all of which was derived from U.S. government customers. For the years ended December 31, 2018 , 2017 and 2016 , we generated approximately 73% , 82% and 84% , respectively, of our total revenue from the U.S. Army.
Income Taxes	Income Taxes We determine the provision or benefit for income taxes using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. In assessing the need for a valuation allowance, we look to the future reversal of existing taxable temporary differences, taxable income in carryback years, the feasibility of tax planning strategies, and estimated future taxable income. The valuation allowance can be affected by changes to tax laws, changes to statutory tax rates and changes to future taxable income estimates.
Goodwill	Goodwill Goodwill represents purchase consideration paid in a business combination that exceeds the fair values assigned to the net assets of acquired businesses. Goodwill is not amortized, but instead is tested for impairment annually (or more frequently if impairment indicators arise, such as changes to the reporting unit structure or significant adverse changes in the business climate). We conduct our annual impairment testing during the fourth fiscal quarter. In reviewing goodwill for impairment, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the estimated fair value of a reporting unit is less than its carrying amount. If we elect to perform a qualitative assessment and determine that an impairment is more likely than not, the entity is then required to perform the existing two-step quantitative impairment test as described below. Otherwise, no further analysis is required. We also may elect not to perform the qualitative assessment and, instead, proceed directly to the two-step quantitative impairment test. The quantitative impairment test is a two-step test. In the first step, the estimated fair value of the reporting unit is developed and compared to the carrying value of the reporting unit. If the estimated fair value of the reporting unit exceeds its carrying value, goodwill is not impaired and the second step of the impairment test is not performed. If the carrying value of the reporting unit exceeds its estimated fair value, then the second step of the impairment test is performed in order to measure the impairment loss to be recorded. If the carrying value of the reporting unit's goodwill exceeds its implied fair value, then we record an impairment loss equal to the difference. We estimate the fair value of our reporting unit using an income approach and a market approach. Under the income approach, we estimate fair value based on the present value of estimated future cash flows. Under the market approach, we compare our company to select reasonably similar publicly traded companies. We acquired SENTEL in 2018. See Note 5, "SENTEL Acquisition" for further discussion of goodwill recognized in the SENTEL acquisition.
Intangible Assets	Intangible Assets We recognize an acquired intangible asset apart from goodwill whenever the intangible arises from contractual or other legal rights, or whenever it can be separated or divided from the acquired entity and sold, transferred, licensed, rented or exchanged, either individually or in combination with a related contract, asset or liability. Such intangibles are amortized over their estimated useful lives unless the estimated useful life is determined to be indefinite. Amortizable intangible assets are being amortized over useful lives of four to eight years. The straight-line method of amortization is used as it has been determined to approximate the use pattern of the assets.
Severance Expense	Severance Expense We periodically initiate management approved restructuring activities to achieve cost savings through reduced operational redundancies and to strategically position ourselves in the market in response to prevailing economic conditions and associated customer demand. Costs associated with restructuring actions can include severance and related benefit charges. For involuntary separation plans, a liability is recognized when it is probable, reasonably estimable, and communicated to employees. For voluntary separation plans, a liability is recognized when the employee irrevocably accepts the termination.
Foreign Currency Transactions	Foreign Currency Translation The financial statements of programs for which the functional currency is not the U.S. dollar are translated into U.S. dollars. Balance sheet accounts are translated at the exchange rate in effect at the end of each period; income statement accounts are translated at the average rates of exchange prevailing during the period. Gains and losses on foreign currency translations are recorded as translation adjustments to other comprehensive (loss) income. Net gains or losses from foreign currency transactions are reported in selling, general and administrative (SG&A) expenses and have historically been immaterial.
Receivables	Receivables Receivables include amounts billed and currently due from customers, amounts unbilled, certain estimated contract change amounts, estimates related to expected award fees, claims or requests for equitable adjustment in negotiation that are probable of recovery, and amounts retained by the customer pending contract completion.
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net are stated at cost less accumulated depreciation. Major improvements are capitalized at cost while expenditures for maintenance, repairs and minor improvements are expensed. For asset sales or retirements, the assets and related accumulated depreciation and amortization are eliminated from the accounts and any resulting gain or loss is reflected in operating income. Depreciation and amortization is generally computed using either an accelerated or straight-line method and is based on estimated useful lives or lease term as follows: Years Building improvements 3 – 10 Machinery, equipment and vehicles 3 – 12 Furniture, fixtures, and office equipment 3 – 7
Operating Leases	Operating Leases Many of our real property lease agreements contain incentives for tenant improvements, rent holidays, or rent escalation clauses. For incentives for tenant improvements, the Company records a deferred rent liability and amortizes the deferred rent over the term of the lease as a reduction to rent expense. For rent holidays and rent escalation clauses during the lease term, the Company records minimum rental expenses on a straight-line basis over the term of the lease. Leasehold improvements capitalized in property, plant and equipment are amortized over the lesser of the remaining life of the lease or the estimated useful life of the improvement.
Long-Lived Asset Impairment	Long-Lived Asset Impairment Long-lived assets are tested for impairment whenever events or changes in circumstances indicate their carrying value may not be recoverable. We assess the recoverability of long-lived assets based on the undiscounted future cash flow the assets are expected to generate and recognize an impairment loss when estimated undiscounted future cash flows expected to result from the use of the asset plus net proceeds expected from disposition of the asset, if any, are less than the carrying value of the asset. When an impairment is identified, we reduce the carrying value of the asset to its estimated fair value based on a discounted cash flow approach or, when available and appropriate, to comparable market values.
Share-Based Compensation	Stock-Based Compensation We recognize stock-based compensation expense primarily within selling, general and administrative expenses based on the grant date fair values for all share-based awards granted over the requisite service periods of the awards, which is generally equivalent to the vesting terms.
Fair Value Measurements	Fair Value Measurements We determine fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In measuring fair value, a fair value hierarchy is applied which categorizes and prioritizes the inputs used to estimate fair value into three levels. The fair value hierarchy is based on maximizing the use of observable inputs and minimizing the use of unobservable inputs when measuring fair value. Classification within the fair value hierarchy is based on the lowest level input that is significant to the fair value measurement. There are three levels of the fair value hierarchy. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are other than quoted prices included within level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices (in nonactive markets or in active markets for similar assets or liabilities), inputs other than quoted prices that are observable, and inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 inputs are unobservable inputs for the assets or liabilities.
Segment Information	Segment Information Management has concluded that the Company operates as one segment based upon the information used by the chief operating decision maker in evaluating the performance of the Company’s business and allocating resources and capital. Although we perform services worldwide, all of our revenue for the years ended December 31, 2018 , 2017 and 2016 was with the U.S. government.
Commitments and Contingencies	Commitments and Contingencies We record accruals for commitments and loss contingencies when they are probable of occurrence and the amounts can be reasonably estimated. In addition, legal fees are accrued for cases where a loss is probable and the related fees can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount of loss. We review these accruals quarterly and adjust the accruals to reflect the impact of negotiations, settlements, rulings, advice of legal counsel and other updated information.
Earnings Per Share	Earnings Per Share We compute earnings per common share on the basis of the weighted average number of common shares, and, where dilutive, common share equivalents, outstanding during the indicated periods.
Derivative Instruments	Derivative Instruments Derivative instruments are recognized as either an asset or liability at fair value in our Consolidated Balance Sheets and are classified as current or long-term based on the scheduled maturity of the instrument. Our derivative instruments have been formally designated and qualify as part of a cash flow hedging relationship under applicable accounting standards. The interest rate derivative instruments are adjusted to fair value through accumulated other comprehensive income (loss). If we were to determine that a derivative was no longer highly effective as a hedge, we would discontinue the hedge accounting prospectively. Gains or losses would be immediately reclassified from accumulated other comprehensive income (loss) to earnings relating to hedged forecasted transactions that are no longer probable of occurring. Gains or losses relating to terminations of effective cash flow hedges in which the forecasted transactions would still be probable of occurring would be deferred and recognized consistent with the income or loss recognition of the underlying hedged item.
Recent Accounting Pronouncements	Accounting Standards Issued But Not Yet Effective In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). The objective of ASU 2016-02 is to recognize lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. ASU 2016-02 requires lessees to account for leases as finance leases or operating leases. Both finance and operating leases will result in the lessee recognizing a right-of-use asset and corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset and, for operating leases, the lessee would recognize a straight-line lease expense. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. We have substantially completed our implementation plan. We have revised our controls and processes to address the lease standard and have completed the implementation and data input for our lease accounting software tool. We have elected the package of practical expedients, which, among other things, allows us to carry forward our prior lease classifications under ASC 840. We have not elected, however, to adopt the hindsight practical expedient and are therefore maintaining the lease terms we previously determined under ASC 840. Adoption of the standard is expected to have an impact of approximately $10 million on our Consolidated Balance Sheet for the addition of lease assets and liabilities related to operating leases. ASU 2016-02 also requires expanded disclosure regarding the amounts, timing and uncertainties of cash flows related to our lease portfolio. We are incorporating the collection of relevant data into our processes in preparation for disclosure in 2019. We do not expect ASU 2016-02 to have a material impact on our results of operations or cash flows. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption of ASU 2017-04 is permitted on goodwill impairment tests performed after January 1, 2017. ASU 2017-04 should be applied on a prospective basis. The standard is not expected to have a material impact on our consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). The objective of ASU 2017-12 is to improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities, and to reduce the complexity of and simplify the application of hedge accounting by preparers. The standard is effective in annual periods beginning after December 15, 2018, and interim periods within those periods. The standard is not expected to have a material impact on our consolidated financial statements. Accounting Standards That Were Adopted In 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Several ASUs have been issued since the issuance of ASU 2014-09, which modify certain sections of ASU 2014-09 and are intended to promote a more consistent interpretation and application of the principles outlined in the standard. We adopted the new revenue recognition standard, ASC Topic 606, using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings as of January 1, 2018. See Note 1, "Description of Business and Summary of Significant Accounting Policies," and Note 3, "Revenue" for a discussion of this new standard. Other new pronouncements issued but not effective until after December 31, 2018 are not expected to have a material impact on our financial position, results of operations or cash flows.

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary Cumulative Catch-Up Adjustments	Cumulative adjustments for the years ended December 31, 2018 , 2017 and 2016 are presented in the following table: Year Ended December 31, (In thousands) 2018 2017 2016 Favorable adjustments $ 14,962 $ 18,256 $ 15,296 Unfavorable adjustments (13,359 ) (6,704 ) (7,837 ) Net favorable adjustments $ 1,603 $ 11,552 $ 7,459
Schedule of Useful Lives	Depreciation and amortization is generally computed using either an accelerated or straight-line method and is based on estimated useful lives or lease term as follows: Years Building improvements 3 – 10 Machinery, equipment and vehicles 3 – 12 Furniture, fixtures, and office equipment 3 – 7 Property, plant and equipment, net consisted of the following at December 31 : (In thousands) 2018 2017 Buildings and improvements $ 1,168 $ 5,197 Machinery and equipment 14,242 5,556 Furniture, fixtures and office equipment 5,877 4,895 Property, plant and equipment, gross 21,287 15,648 Less: accumulated depreciation and amortization (7,868 ) (11,915 ) Property, plant and equipment, net $ 13,419 $ 3,733

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Summary Impact of Adoption of new ASU	The effects of the adoption of ASC Topic 606, using the modified retrospective method on January 1, 2018, are outlined in the following table: (In thousands) Year Ended December 31, 2017 Impact January 1, 2018 Receivables (unbilled) $ 121,601 $ 10,457 $ 132,058 Costs incurred in excess of billings $ 12,751 $ (12,751 ) $ — Billings in excess of costs $ 3,766 $ (3,766 ) $ — Impact to contract liabilities $ — $ 1,621 $ 1,621 Retained earnings, net of tax $ 117,415 $ (95 ) $ 117,320 The following table reflects the balances of financial statement line items under the ASC Topic 606 revenue recognition guidance compared to the former ASC Topic 605 revenue guidance for the year ended December 31, 2018 : Year Ended December 31, 2018 New Guidance Former Guidance (In thousands) ASC Topic 606 ASC Topic 605 Revenue $ 1,279,304 $ 1,269,560 Cost of revenue $ 1,164,609 $ 1,148,199 Selling, general and administrative expenses $ 66,372 $ 66,372 Operating income $ 48,323 $ 54,989

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation	Remaining performance obligations as of December 31, 2018 and December 31, 2017 are presented in the following table: Year Ended December 31, (In millions) 2018 2017 Performance Obligations $ 858 $ 719
Contract with Customer, Asset and Liability	Cumulative adjustments to operating income for the years ended December 31, 2018 , December 31, 2017 and December 31, 2016 are presented in the following table: Year Ended December 31, (In thousands) 2018 2017 2016 Favorable adjustments $ 14,962 $ 18,256 $ 15,296 Unfavorable adjustments (13,359 ) (6,704 ) (7,837 ) Net favorable adjustments $ 1,603 $ 11,552 $ 7,459
Summary Impact of Adoption of new ASU	The effects of the adoption of ASC Topic 606, using the modified retrospective method on January 1, 2018, are outlined in the following table: (In thousands) Year Ended December 31, 2017 Impact January 1, 2018 Receivables (unbilled) $ 121,601 $ 10,457 $ 132,058 Costs incurred in excess of billings $ 12,751 $ (12,751 ) $ — Billings in excess of costs $ 3,766 $ (3,766 ) $ — Impact to contract liabilities $ — $ 1,621 $ 1,621 Retained earnings, net of tax $ 117,415 $ (95 ) $ 117,320 The following table reflects the balances of financial statement line items under the ASC Topic 606 revenue recognition guidance compared to the former ASC Topic 605 revenue guidance for the year ended December 31, 2018 : Year Ended December 31, 2018 New Guidance Former Guidance (In thousands) ASC Topic 606 ASC Topic 605 Revenue $ 1,279,304 $ 1,269,560 Cost of revenue $ 1,164,609 $ 1,148,199 Selling, general and administrative expenses $ 66,372 $ 66,372 Operating income $ 48,323 $ 54,989
Disaggregation of Revenue	The following tables present our revenue disaggregated by different categories. Revenue by contract type for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Cost-plus and cost-reimbursable ¹ $ 995,415 $ 818,908 $ 892,842 Firm-fixed-price 283,889 295,880 297,677 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 ¹ Includes time and material contracts Revenue by geographic region in which the contract is performed for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Middle East $ 889,620 $ 871,821 $ 976,586 United States 269,750 168,003 157,161 Europe 119,934 74,964 56,772 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 Revenue by contract relationship for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Prime contractor $ 1,200,726 $ 1,083,485 $ 1,131,773 Subcontractor 78,578 31,303 58,746 Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519 Revenue by customer for the years 2018 , 2017 and 2016 are as follows: Year Ended December 31, (In thousands) 2018 2017 2016 Army $ 934,427 $ 915,554 $ 1,004,842 Air Force 259,511 177,338 165,611 Navy 38,802 21,896 20,066 Other 46,564 — — Total revenue $ 1,279,304 $ 1,114,788 $ 1,190,519

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense	The sources of pre-tax income and the components of income tax expense for the years ended December 31, 2018 , 2017 and 2016 , respectively, are as follows: (in thousands) 2018 2017 2016 Income Components United States $ 41,449 $ 34,386 $ 37,276 Foreign 1,803 2,194 (89 ) Total pre-tax income from continuing operations $ 43,252 $ 36,580 $ 37,187 Income tax expense components Current income tax provision United States-Federal $ 6,305 $ 11,952 $ 15,106 United States-State and local 653 206 311 Foreign 515 758 371 Total current income tax provision 7,473 12,916 15,788 Deferred income tax provision (benefit) United States-Federal (79 ) (35,486 ) (1,733 ) United States-State and local 52 (260 ) (278 ) Foreign 510 (87 ) (245 ) Total deferred income tax provision (benefit) 483 (35,833 ) (2,256 ) Total income tax expense (benefit) $ 7,956 $ (22,917 ) $ 13,532 Effective income tax rate 18.4 % (62.6 )% 36.4 %
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the income tax provision at the U.S. statutory rate to the effective income tax rate as reported is as follows: 2018 2017 2016 Tax provision at U.S. statutory rate 21.0 % 35.0 % 35.0 % State and local income tax, net of federal benefit 1.3 % (0.1 )% 0.1 % Foreign taxes 0.3 % (2.5 )% — % Uncertain tax positions 3.4 % — % — % Prior year true-ups 0.4 % 0.3 % — % Foreign derived intangible income deduction (2.9 )% — % — % Credits (0.8 )% — % — % Other 0.4 % 1.7 % 1.3 % Impact of federal rate change (4.7 )% (97.0 )% — % Effective income tax rate 18.4 % (62.6 )% 36.4 %
Schedule of Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities include the following: (in thousands) 2018 2017 Deferred Tax Assets Costs incurred in excess of billings $ — $ 814 Compensation and benefits 4,444 4,667 Reserves 3,028 2,473 Other 802 854 Net operating losses 295 133 Total deferred tax assets $ 8,569 $ 8,941 Deferred Tax Liabilities Goodwill and intangibles $ (46,832 ) $ (46,890 ) Unbilled receivables (15,112 ) (16,635 ) Property, plant and equipment, net (709 ) 774 Other liabilities (1,192 ) (1,169 ) Total deferred tax liabilities (63,845 ) (63,920 ) Net deferred tax liabilities $ (55,276 ) $ (54,979 )
Schedule of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits as of December 31, 2018 , 2017 and 2016 is as follows: (in thousands) 2018 2017 2016 Unrecognized tax benefits-January 1, $ — $ 429 $ — Additions for: Current year tax positions 1,275 — 429 Prior year tax positions 480 — — Reductions for: Settlements with tax authorities — (429 ) — Prior year tax positions — — — Unrecognized tax benefits-December 31, $ 1,755 $ — $ 429

SENTEL Acquisition (Tables)

SENTEL Acquisition (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(In thousands) Allocation of Purchase Price Receivables $ 23,339 Property, plant and equipment 810 Goodwill 16,689 Intangible assets 10,500 Other current assets 975 Accounts payable (10,012 ) Other current liabilities (5,446 ) Purchase price, net of cash acquired $ 36,855

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Weighted Average Shares Outstanding	Year Ended December 31, (In thousands, except per share data) 2018 2017 2016 Net Income $ 35,296 $ 59,497 $ 23,655 Weighted average common shares outstanding 11,224 11,021 10,714 Add: Dilutive impact of stock options 63 67 97 Add: Dilutive impact of restricted stock units 91 121 163 Diluted weighted average common shares outstanding 11,378 11,209 10,974 Earnings per share Basic $ 3.14 $ 5.40 $ 2.21 Diluted $ 3.10 $ 5.31 $ 2.16
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The table below provides a summary of securities that could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the period presented. Year Ended December 31, (In thousands) 2018 2017 2016 Anti-dilutive stock options 3 8 — Anti-dilutive restricted stock units — — 9 Total 3 8 9

Receivables (Tables)

Receivables (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Receivables	Receivables were comprised of the following: December 31, (In thousands) 2018 2017 Billed receivables $ 44,868 $ 50,595 Unbilled receivables (contract assets) 181,009 121,601 Other 6,242 2,799 Receivables $ 232,119 $ 174,995

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Maturities of Term Facility	The Company's aggregate scheduled maturities of the Amended Term Loan as of December 31, 2018 , are as follows: (In thousands) Payments due 2019 $ 4,500 2020 6,500 2021 8,600 2022 55,400 Total $ 75,000
Schedule of Carrying Values and Fair Values of Term Facility	Carrying values and fair values of the Amended Term Loan on the Consolidated Balance Sheet as of December 31, 2018 were as follows: December 31, 2018 (In thousands) Carrying Amount Fair Value Short-term debt $ 4,500 $ 4,500 Long-term debt 70,500 70,500 Total debt 75,000 $ 75,000 Debt financing fees (1,363 ) Total debt with debt financing fees $ 73,637 Carrying values and fair values of the Amended Term Loan on the Consolidated Balance Sheet as of December 31, 2017 were as follows: December 31, 2017 (In thousands) Carrying Amount Fair Value Short-term debt $ 4,000 $ 4,000 Long-term debt 75,000 75,000 Total debt 79,000 $ 79,000 Debt financing fees (1,789 ) Total debt with debt financing fees $ 77,211

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Liabilities at Fair Value	The following table summarizes the amount at fair value and location of the derivative instrument in the Consolidated Balance Sheet as of December 31, 2018 : Fair Value (In thousands) Balance sheet caption Amount Interest rate swap designated as cash flow hedge Other current assets $ 121 Interest rate swap designated as cash flow hedge Other non-current assets $ 104 The following table summarizes the amount at fair value and location of the terminated derivative instruments in the Consolidated Balance Sheet as of December 31, 2017 : Fair Value (In thousands) Balance sheet caption Amount Interest rate swap designated as cash flow hedge Other accrued liabilities $ 127 Interest rate swap designated as cash flow hedge Other non-current assets $ 60
Schedule of Foreign Exchange Contracts	The following table summarizes the amount at fair value and location of the derivative instruments used for our forward contract hedges in the Consolidated Balance Sheet as of December 31, 2018. Fair Value (In thousands) Balance sheet caption Amount Foreign currency forward contracts designated as cash flow hedge Other accrued liabilities $ 351 Foreign currency forward contracts designated as cash flow hedge Other non-current liabilities $ 7

Composition of Certain Financ_2

Composition of Certain Financial Statement Captions (Tables)	12 Months Ended
	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Schedule of Compensation and Other Employee Benefits	Compensation and other employee benefits are affected by short-term fluctuations in the timing of payments and were comprised of the following at December 31: (In thousands) 2018 2017 Accrued salaries and wages $ 20,435 $ 21,879 Accrued bonus 7,261 4,210 Accrued employee benefits 14,094 13,215 Total $ 41,790 $ 39,304
Schedule of Other Accrued Liabilities	Other accrued liabilities were comprised of the following at December 31: (In thousands) 2018 2017 Workers' compensation, auto and general liability reserve $ 5,369 $ 4,615 Contract related reserves 7,133 7,426 Other accrued liabilities 9,801 7,168 Total $ 22,303 $ 19,209

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Depreciation and amortization is generally computed using either an accelerated or straight-line method and is based on estimated useful lives or lease term as follows: Years Building improvements 3 – 10 Machinery, equipment and vehicles 3 – 12 Furniture, fixtures, and office equipment 3 – 7 Property, plant and equipment, net consisted of the following at December 31 : (In thousands) 2018 2017 Buildings and improvements $ 1,168 $ 5,197 Machinery and equipment 14,242 5,556 Furniture, fixtures and office equipment 5,877 4,895 Property, plant and equipment, gross 21,287 15,648 Less: accumulated depreciation and amortization (7,868 ) (11,915 ) Property, plant and equipment, net $ 13,419 $ 3,733

Leases and Rentals (Tables)

Leases and Rentals (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of Future Operating Lease Payments Under Non-Cancellable Operating Leases	Future operating lease payments under non-cancellable operating leases with an initial term in excess of one year as of December 31, 2018 are shown below: (In thousands) Payments due 2019 $ 3,480 2020 2,986 2021 1,730 2022 894 2023 893 2024 and later 3,872 Total minimum lease payments $ 13,855

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Impact of Stock-Based Compensation in Consolidated and Combined Statements of Income	Stock-based compensation expense and the associated tax benefits impacting our Consolidated Statements of Income were as follows: Year Ended December 31, (In thousands) 2018 2017 Compensation costs for equity-based awards $ 3,490 $ 2,863 Compensation costs for liability-based awards 606 1,604 Total compensation costs, pre-tax $ 4,096 $ 4,467 Future tax benefit $ 888 $ 965
Schedule of Non-Qualified Stock Options, Activity	A summary of the status of our NQOs as of December 31, 2018 , 2017 and 2016 and changes during the years then ended is presented below: Year Ended December 31, 2018 2017 2016 (In thousands, except per share data) Shares Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share Outstanding at January 1, 325 $22.74 384 $21.47 486 $19.25 Granted — $0.00 75 $22.82 87 $20.06 Exercised (73 ) $21.87 (110 ) $18.41 (158 ) $13.63 Forfeited, canceled or expired (1 ) $20.62 (24 ) $22.61 (31 ) $22.51 Outstanding at December 31, 251 $23.00 325 $22.74 384 $21.47 Options exercisable 184 $23.35 201 $22.57 214 $20.35
Schedule of Non-Qualified Stock Options Outstanding and Exercisable	The following table summarizes information about NQOs outstanding and exercisable as of December 31, 2018 : (In thousands, except per share data) Options Outstanding Options Exercisable Range of Exercise Prices Per Share Number Weighted Average Remaining Contractual Life (In Years) Weighted Average Exercise Price Per Share Aggregate Intrinsic Value Number Weighted Average Remaining Contractual Life (In Years) Weighted Average Exercise Price Per Share Aggregate Intrinsic Value $12.94 - $21.98 172 6.80 $ 20.25 $ 250 112 6.24 $ 19.69 $ 211 $22.16 - $32.49 79 6.12 29.00 — 72 5.90 29.03 — Total options and aggregate intrinsic value 251 6.58 $ 23.00 $ 250 184 6.11 $ 23.35 $ 211
Schedule of Weighted Average Assumptions	The following weighted-average assumptions were utilized in deriving the fair value for NQOs: Year Ended December 31, 2017 2016 Expected volatility 30.8 % 30.2 % Expected life (in years) 7 7 Risk-free rates 2.30 % 1.69 % Weighted-average grant date fair value per share $ 8.48 $ 7.06
Schedule of Restricted Stock Units, Activity	The table below provides a roll-forward of outstanding RSUs for the years ended December 31, 2018, 2017, and 2016. Year Ended December 31, 2018 2017 2016 (In thousands, except per share data) Shares Weighted Average Grant Date Fair Value Per Share Shares Weighted Average Grant Date Fair Value Per Share Shares Weighted Average Grant Date Fair Value Per Share Outstanding at January 1, 221 $ 23.58 285 $ 23.01 350 $22.47 Granted 163 $ 33.08 144 $ 23.74 181 $21.25 Vested (110 ) $ 24.93 (171 ) $ 23.18 (206 ) $20.56 Forfeited or canceled (17 ) $ 25.54 (37 ) $ 21.69 (40 ) $22.68 Outstanding at December 31, 257 $ 28.90 221 $ 23.58 285 $23.01

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The following table comprises selected financial data for the years ended December 31, 2018 and 2017 : 2018 QUARTERS 2017 QUARTERS (In thousands, except per share data) 1st 2nd 3rd 4th 1st 2nd 3rd 4th Total revenue $ 320,516 $ 321,132 $ 308,095 $ 329,561 $ 290,063 $ 259,318 $ 269,625 $ 295,782 Gross Profit 26,466 29,068 29,131 30,030 25,362 25,735 24,406 26,445 Operating income 8,671 12,998 14,006 12,648 11,649 9,204 10,090 10,277 Net income 6,111 9,195 9,866 10,124 6,668 5,461 5,800 41,568 Basic earnings per share $ 0.55 $ 0.82 $ 0.88 $ 0.90 $ 0.61 $ 0.50 $ 0.52 $ 3.77 Diluted earnings per share $ 0.54 $ 0.81 $ 0.86 $ 0.89 $ 0.60 $ 0.49 $ 0.51 $ 3.70 Weighted average number of shares outstanding Basic 11,146 11,235 11,248 11,262 10,909 10,987 11,075 11,026 Diluted 11,338 11,383 11,406 11,369 11,075 11,191 11,272 11,234

Description of Business and S_4

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)	Sep. 28, 2018USD ($)	Jun. 29, 2018USD ($)	Mar. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 29, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounting Policies [Line Items]
Revenue									$ 1,279,304	$ 1,114,788	$ 1,190,519
Number of reportable segments | segment									1
Revenue	$ 329,561	$ 308,095	$ 321,132	$ 320,516	$ 295,782	$ 269,625	$ 259,318	$ 290,063
Goodwill impairment charges									$ 0	0	0
Goodwill, acquired									$ 0	0	0
Buildings improvements | Minimum
Accounting Policies [Line Items]
Estimated useful life									3 years
Buildings improvements | Maximum
Accounting Policies [Line Items]
Estimated useful life									10 years
Machinery, equipment and vehicles | Minimum
Accounting Policies [Line Items]
Estimated useful life									3 years
Machinery, equipment and vehicles | Maximum
Accounting Policies [Line Items]
Estimated useful life									12 years
Furniture, fixtures, and office equipment | Minimum
Accounting Policies [Line Items]
Estimated useful life									3 years
Furniture, fixtures, and office equipment | Maximum
Accounting Policies [Line Items]
Estimated useful life									7 years
Government customers
Accounting Policies [Line Items]
Revenue										$ 1,100,000	$ 1,200,000
Total revenue | Credit risk | U.S. Army
Accounting Policies [Line Items]
Concentration risk, percentage									73.00%	82.00%	84.00%
High Desert Support Services (HDSS)
Accounting Policies [Line Items]
Ownership percentage	40.00%								40.00%
Equity investment balance	$ 2,400				$ 1,700				$ 2,400	$ 1,700

Description of Business and S_5

Description of Business and Summary of Significant Accounting Policies - Summary of Cumulative Catch-Up Adjustments (Details) - Contracts accounted for under percentage of completion - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Concentration Risk [Line Items]
Favorable adjustments	$ 14,962	$ 18,256	$ 15,296
Unfavorable adjustments	(13,359)	(6,704)	(7,837)
Net favorable adjustments	$ 1,603	$ 11,552	$ 7,459

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements Recent Accounting Pronouncements (Details) - Subsequent Event - Scenario, Forecast - Accounting Standards Update 2016-02 $ in Millions	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 10
Operating lease liability	$ 10

Revenue - Performance Obligatio

Revenue - Performance Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Performance obligation timing	Our contracts are multi-year contracts and typically include an initial period of one year or less with annual one-year (or less) option periods.
Increase in remaining performance obligations	$ 139.1
Performance Obligations	$ 858	$ 719

Revenue - Performance Obligat_2

Revenue - Performance Obligations (Percentage and Remaining Period of Time) (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01	Dec. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	100.00%
Remaining performance obligation, expected timing of satisfaction, period	1 year

Revenue - Contract Estimates (D

Revenue - Contract Estimates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer [Abstract]
Favorable adjustments	$ 14,962	$ 18,256	$ 15,296
Unfavorable adjustments	(13,359)	(6,704)	(7,837)
Net favorable adjustments	1,603	11,552	7,459
Net favorable adjustment to operating income	$ (800)	$ (9,700)	$ (7,200)

Revenue - Revenue by Contract T

Revenue - Revenue by Contract Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,279,304	$ 1,114,788	$ 1,190,519
Cost-plus and cost-reimbursable
Disaggregation of Revenue [Line Items]
Total revenue	995,415	818,908	892,842
Firm-fixed-price
Disaggregation of Revenue [Line Items]
Total revenue	$ 283,889	$ 295,880	$ 297,677

Revenue - Revenue by Geographic

Revenue - Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,279,304	$ 1,114,788	$ 1,190,519
Middle East
Disaggregation of Revenue [Line Items]
Total revenue	889,620	871,821	976,586
United States
Disaggregation of Revenue [Line Items]
Total revenue	269,750	168,003	157,161
Europe
Disaggregation of Revenue [Line Items]
Total revenue	$ 119,934	$ 74,964	$ 56,772

Revenue - Revenue by Contract R

Revenue - Revenue by Contract Relationship (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,279,304	$ 1,114,788	$ 1,190,519
Prime contractor
Disaggregation of Revenue [Line Items]
Total revenue	1,200,726	1,083,485	1,131,773
Subcontractor
Disaggregation of Revenue [Line Items]
Total revenue	$ 78,578	$ 31,303	$ 58,746

Revenue - Revenue by Customer (

Revenue - Revenue by Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,279,304	$ 1,114,788	$ 1,190,519
Army
Disaggregation of Revenue [Line Items]
Total revenue	934,427	915,554	1,004,842
Air Force
Disaggregation of Revenue [Line Items]
Total revenue	259,511	177,338	165,611
Navy
Disaggregation of Revenue [Line Items]
Total revenue	38,802	21,896	20,066
Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 46,564	$ 0	$ 0

Revenue - Contract Balances (De

Revenue - Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018
Revenue from Contract with Customer [Abstract]
Revnue from performance obligations, satisfied in previous period	$ 900
Contract assets	181,000
Contract liability	$ 0	$ 1,621

Revenue - ASC Topic 606 Impact

Revenue - ASC Topic 606 Impact (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Capitalized bonus incentives	$ 400								$ 400
Costs incurred in excess of billings									100
Effects of the Adoption of ASC 606 compared to Former ASC Topic 605 [Abstract]
Receivables (unbilled)												$ 132,058
Costs incurred in excess of billings	0				$ 12,751				0	$ 12,751		0
Billings in excess of costs	0				3,766				0	3,766		0
Impact to contract liabilities	0								0			1,621
Retained earnings, net of tax	152,616				117,415				152,616	117,415		117,320
Revenue									1,279,304	1,114,788	$ 1,190,519
Cost of revenue									1,164,609	1,012,840	1,083,607
Selling, general and administrative expenses									66,372	60,728	64,086
Operating income	$ 12,648	$ 14,006	$ 12,998	$ 8,671	10,277	$ 10,090	$ 9,204	$ 11,649	48,323	41,220	$ 42,826
Calculated under Revenue Guidance in Effect before Topic 606
Effects of the Adoption of ASC 606 compared to Former ASC Topic 605 [Abstract]
Receivables (unbilled)					121,601					121,601
Costs incurred in excess of billings					12,751					12,751
Billings in excess of costs					3,766					3,766
Impact to contract liabilities					0					0
Retained earnings, net of tax					$ 117,415					$ 117,415
Revenue									1,269,560
Cost of revenue									1,148,199
Selling, general and administrative expenses									66,372
Operating income									$ 54,989
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Effects of the Adoption of ASC 606 compared to Former ASC Topic 605 [Abstract]
Receivables (unbilled)												10,457
Costs incurred in excess of billings												(12,751)
Billings in excess of costs												(3,766)
Impact to contract liabilities												1,621
Retained earnings, net of tax												$ (95)

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Components
United States	$ 41,449	$ 34,386	$ 37,276
Foreign	1,803	2,194	(89)
Income from operations before income taxes	43,252	36,580	37,187
Current income tax provision
United States-Federal	6,305	11,952	15,106
United States-State and local	653	206	311
Foreign	515	758	371
Total current income tax provision	7,473	12,916	15,788
Deferred income tax provision (benefit)
United States-Federal	(79)	(35,486)	(1,733)
United States-State and local	52	(260)	(278)
Foreign	510	(87)	(245)
Total deferred income tax provision (benefit)	483	(35,833)	(2,256)
Total income tax expense (benefit)	$ 7,956	$ (22,917)	$ 13,532
Effective income tax rate	18.40%	(62.60%)	36.40%

SENTEL Acquisition - Additional

SENTEL Acquisition - Additional Information (Details) - USD ($) $ in Thousands	Jan. 23, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase price, net of cash acquired		$ 36,855	$ 0	$ 0
Amortization of intangible assets		1,999	0	$ 0
Goodwill		$ 233,619	216,930
SENTEL
Acquired Finite-Lived Intangible Assets [Line Items]
Percentage of outstanding common stock acquired	100.00%
Purchase price, net of cash acquired	$ 36,855
Consideration transferred	36,000
Working capital adjustment	900
Weighted average remaining useful life		4 years 8 months 20 days
Amortization of intangible assets		$ 2,000
Goodwill	16,689
Acquisition related costs		800
Revenue of acquiree since acquisition date		$ 112,300
Order or Production Backlog | SENTEL
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	6,500
Amortization period		4 years
Contract Re-competes | SENTEL
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 4,000
Amortization period		8 years
SENTEL
Acquired Finite-Lived Intangible Assets [Line Items]
Recognized revenue from acquired entity			$ 107,000

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax provision at U.S. statutory rate	21.00%	35.00%	35.00%
State and local income tax, net of federal benefit	1.30%	(0.10%)	0.10%
Foreign taxes	0.30%	(2.50%)	0.00%
Uncertain tax positions	3.40%	0.00%	0.00%
Prior year true-ups	0.40%	0.30%	0.00%
Foreign derived intangible income deduction	(2.90%)	(0.00%)	(0.00%)
Credits	(0.80%)	(0.00%)	(0.00%)
Other	0.40%	1.70%	1.30%
Impact of federal rate change	(4.70%)	(97.00%)	0.00%
Effective income tax rate	18.40%	(62.60%)	36.40%

SENTEL Acquisition - Business A

SENTEL Acquisition - Business Acquisition (Details) - USD ($) $ in Thousands	Jan. 23, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 233,619	$ 216,930
Purchase price, net of cash acquired		$ 36,855	$ 0	$ 0
SENTEL
Business Acquisition [Line Items]
Receivables	$ 23,339
Property, plant and equipment	810
Goodwill	16,689
Intangible assets	10,500
Other current assets	975
Accounts payable	(10,012)
Other current liabilities	(5,446)
Purchase price, net of cash acquired	$ 36,855

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets
Costs incurred in excess of billings	$ 0	$ 814
Compensation and benefits	4,444	4,667
Reserves	3,028	2,473
Other	802	854
Net operating losses	295	133
Total deferred tax assets	8,569	8,941
Deferred Tax Liabilities
Goodwill and intangibles	(46,832)	(46,890)
Unbilled receivables	(15,112)	(16,635)
Property, plant and equipment, net	(709)	774
Other liabilities	(1,192)	(1,169)
Total deferred tax liabilities	(63,845)	(63,920)
Deferred Tax Liabilities, Net	$ 55,276	$ 54,979

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits-January 1,	$ 0	$ 429	$ 0
Additions for:
Current year tax positions	1,275	0	429
Prior year tax positions	480	0	0
Reductions for:
Settlements with tax authorities	0	(429)	0
Prior year tax positions	0	0	0
Unrecognized tax benefits-December 31,	$ 1,755	$ 0	$ 429

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits	$ 1,755	$ 0	$ 429	$ 0
Unrecognized tax benefits, resulting from current year tax positions	1,275	0	429
Settlements with tax authorities	0	429	0
Interest expense related to tax matters	0	0	$ 0
Tax Cuts and Jobs Act of 2017, income tax benefit		35,100
Tax Cuts and Jobs Act of 2017, additional income tax benefit		$ 2,000
GILTI income tax benefit	100
FDII income tax expense benefit	$ 1,300

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of Basic and Diluted Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 10,124	$ 9,866	$ 9,195	$ 6,111	$ 41,568	$ 5,800	$ 5,461	$ 6,668	$ 35,296	$ 59,497	$ 23,655
Weighted average common shares outstanding - basic (in shares)	11,262	11,248	11,235	11,146	11,026	11,075	10,987	10,909	11,224	11,021	10,714
Add: Dilutive impact of stock options (in shares)									63	67	97
Weighted average number of shares outstanding - diluted (in shares)	11,369	11,406	11,383	11,338	11,234	11,272	11,191	11,075	11,378	11,209	10,974
Basic earnings per share (in dollars per share)	$ 0.90	$ 0.88	$ 0.82	$ 0.55	$ 3.77	$ 0.52	$ 0.50	$ 0.61	$ 3.14	$ 5.40	$ 2.21
Diluted earnings per share (in dollars per share)	$ 0.89	$ 0.86	$ 0.81	$ 0.54	$ 3.70	$ 0.51	$ 0.49	$ 0.60	$ 3.10	$ 5.31	$ 2.16
Anti-dilutive restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Add: Dilutive impact of restricted stock units (in shares)									91	121	163

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share - Anti-dilutive Options (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	3	8	9
Anti-dilutive stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	3	8	0
Anti-dilutive restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	0	0	9

Receivables - Schedule of Recei

Receivables - Schedule of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Billed receivables	$ 44,868	$ 50,595
Unbilled receivables (contract assets)	181,009	121,601
Other	6,242	2,799
Receivables	232,119	$ 174,995
Estimated contract receivables	$ 900

Debt - Additional Information (

Debt - Additional Information (Details)	Nov. 15, 2017USD ($)	Dec. 31, 2018USD ($)letters_of_credit	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Payments of debt issuance costs		$ 0	$ 1,844,000	$ 221,000
Amortization expense		$ 426,000	1,464,000	1,198,000
Letters of credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 25,000,000
Number of letters of credit outstanding | letters_of_credit		6
Letters of credit outstanding		$ 10,100,000
Senior secured credit facilities
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	200,000,000
Maximum allowed dividend distribution		$ 19,300,000
Covenant terms, ratio of total indebtedness to combined EBITDA		3
Covenant terms, maximum debt to EBITDA ratio, 12 months following purchase		3.25
Covenant terms, ratio of combined EBITDA to combined interest expense		4.50
Ratio of total indebtedness to combined EBITDA		1.25
Ratio of combined EBITDA to combined interest expense		11.61
Interest rate		4.53%
Senior secured credit facilities | Minimum
Debt Instrument [Line Items]
Undrawn portion of revolving facility, commitment fee percentage		0.30%
Senior secured credit facilities | Maximum
Debt Instrument [Line Items]
Undrawn portion of revolving facility, commitment fee percentage		0.45%
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Spread on variable rate		1.75%
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Spread on variable rate		2.50%
Senior secured credit facilities | Base rate | Minimum
Debt Instrument [Line Items]
Spread on variable rate		0.75%
Senior secured credit facilities | Base rate | Maximum
Debt Instrument [Line Items]
Spread on variable rate		1.50%
Senior secured credit facilities | Line of Credit
Debt Instrument [Line Items]
Amortization expense			1,400,000	$ 1,200,000
Write off of deferred debt issuance costs			$ 800,000
Term facility
Debt Instrument [Line Items]
Line of credit		$ 75,000,000
Term facility | Line of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 80,000,000
Debt instrument, term	5 years
Distribution to subsidiary of Exelis	$ 74,600,000
Payments of debt issuance costs	1,800,000
Amortization expense		400,000
Revolver | Line of Credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 120,000,000
Debt instrument, term	5 years
Available borrowing capacity		109,900,000
Quarterly Through September 30, 2019 | Term facility
Debt Instrument [Line Items]
Line of credit		1,000,000
Quarterly December 31, 2019 | Term facility
Debt Instrument [Line Items]
Line of credit		1,500,000
Quarterly Fiscal Quarters December 31, 2020 Through September 30, 2021 | Term facility
Debt Instrument [Line Items]
Line of credit		2,000,000
Quarterly December 31, 2021 Through September 30, 2022 | Term facility
Debt Instrument [Line Items]
Line of credit		2,600,000
Due November 15, 2022 | Term facility
Debt Instrument [Line Items]
Line of credit		$ 47,600,000

Debt - Schedule of Maturities o

Debt - Schedule of Maturities of Term Facility (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total	$ 73,637	$ 77,211
Term facility
Debt Instrument [Line Items]
2,019	4,500
2,020	6,500
2,021	8,600
2,022	55,400
Total	$ 75,000

Debt - Schedule of Carrying Val

Debt - Schedule of Carrying Values and Fair Values of Term Facility (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt financing fees	$ (1,363)	$ (1,789)
Total	73,637	77,211
Carrying Amount | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	75,000	79,000
Carrying Amount | Short-term debt | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	4,500	4,000
Carrying Amount | Long-term debt | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	70,500	75,000
Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	75,000	79,000
Fair Value | Short-term debt | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	4,500	4,000
Fair Value | Long-term debt | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	$ 70,500	$ 75,000

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Reduction of accumulated other comprehensive loss		$ 358	$ 1	$ 2
Decreased interest expense on sale of derivatives		(5,071)	$ (4,640)	$ (5,639)
Interest rate swap | Cash flow hedging
Derivative [Line Items]
Proceeds from sale of derivative instrument	$ 400
Increase (decrease) in derivative assets	(400)
Reduction of accumulated other comprehensive loss	400
Interest rate swap | Cash flow hedging | Designated as hedging instrument
Derivative [Line Items]
Derivative, notional amount		56,400
Foreign exchange forward
Derivative [Line Items]
Derivative, notional amount		7,400
Gain (loss) on derivative instruments		100
Reclassification out of Accumulated Other Comprehensive Income | Interest rate swap
Derivative [Line Items]
Gain (loss) on derivative instruments		$ 200
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swap | Cash flow hedging
Derivative [Line Items]
Decreased interest expense on sale of derivatives	$ 400

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments - Interest Rate Hedges in the Consolidated Balance Sheets (Details) - Designated as hedging instrument - Cash flow hedging - Interest rate swap - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other current assets
Derivative [Line Items]
Interest rate swap liabilities designated as cash flow hedge	$ 121
Other non-current assets
Derivative [Line Items]
Interest rate swap assets designated as cash flow hedge	$ 104	$ 60
Other accrued liabilities
Derivative [Line Items]
Interest rate swap liabilities designated as cash flow hedge		$ 127

Derivative Instruments Deriva_2

Derivative Instruments Derivative instruments - Forward Contract Hedges in the Consolidated Balance Sheets (Details) - Foreign exchange forward - Designated as hedging instrument - Cash flow hedging $ in Thousands	Dec. 31, 2018USD ($)
Other accrued liabilities
Derivative [Line Items]
Foreign currency forward contracts designated as cash flow hedge	$ 351
Other non-current liabilities
Derivative [Line Items]
Foreign currency forward contracts designated as cash flow hedge	$ 7

Composition of Certain Financ_3

Composition of Certain Financial Statement Captions - Schedule of Compensation and Other Employee Benefits (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Compensation and Other Employee Benefits
Accrued salaries and wages	$ 20,435	$ 21,879
Accrued bonus	7,261	4,210
Accrued employee benefits	14,094	13,215
Total	$ 41,790	$ 39,304

Composition of Certain Financ_4

Composition of Certain Financial Statement Captions - Schedule of Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Accrued Liabilities
Workers' compensation, auto and general liability reserve	$ 5,369	$ 4,615
Contract related reserves	7,133	7,426
Other accrued liabilities	9,801	7,168
Total	$ 22,303	$ 19,209

Property, Plant and Equipment_3

Property, Plant and Equipment, Net - Plant, Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 21,287	$ 15,648
Less: accumulated depreciation and amortization	(7,868)	(11,915)
Property, plant and equipment, net	13,419	3,733
Buildings improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,168	5,197
Machinery, equipment and vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,242	5,556
Furniture, fixtures, and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,877	$ 4,895

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 1,798	$ 1,686	$ 1,920

Leases and Rentals - Schedule o

Leases and Rentals - Schedule of Future Operating Lease Payments Under Non-Cancellable Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases [Abstract]
Operating leases, rental expenses	$ 6,300	$ 3,500	$ 6,000
2,019	3,480
2,020	2,986
2,021	1,730
2,022	894
2,023	893
2024 and later	3,872
Total minimum lease payments	$ 13,855

Post Employment Benefit Plans (

Post Employment Benefit Plans (Details) - USD ($) $ in Millions	Sep. 11, 2014	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Portion of contributions charged to income		$ 5.2	$ 3
Benefits plan vesting percentage	100.00%
Benefit contributions accrued		$ 0.1

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options, out of the money (less than 0.1 million)			0.1
Vested or expected to vest (in shares)			0.3
Vested or expected to vest, weighted average exercise price (in dollars per share)			$ 23
Vested or expected to vest, aggregate intrinsic value			$ 200
Vested or expected to vest, weighted average remaining contractual life			6 years 6 months 29 days
Expected life			7 years
Compensation cost for awards			$ 4,096	$ 4,467
Equity Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs			$ 4,100
Unrecognized compensation costs, period for recognition			1 year 9 months
Compensation cost for awards			$ 3,490	2,863
Liability Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based liabilities paid			1,000	100
Unrecognized compensation costs			$ 1,300
Unrecognized compensation costs, period for recognition			1 year 8 months 9 days
Compensation cost for awards			$ 606	1,604
Non-Qualified Stock Options (NQO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration from the date of grant			10 years
Stock price (in dollars per share)			$ 21.58
Options exercised in period, intrinsic value			$ 100	$ 1,400	$ 1,600
Expected life			7 years	7 years	7 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU's vested in period, fair value			$ 3,300	$ 4,500	$ 3,400
Key Employees | Total Shareholder Return Awards (TSR)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Aggregate award target value			$ 2,200	1,500	1,500
Compensation cost for awards			300	1,000	$ 600
Cash paid to settle awards		$ 600
Compensation and other employee benefits non-current			$ 1,500	$ 1,900
Key Employees | Minimum | Total Shareholder Return Awards (TSR)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shareholder return award target			0.00%
Key Employees | Maximum | Total Shareholder Return Awards (TSR)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shareholder return award target			200.00%
2014 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of Company's common stock authorized for issuance (in shares)			2.6
Shares available (in shares)			1.1
Share-based Compensation Award, Tranche One | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Share-based Compensation Award, Tranche One | Capital lease obligations | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Share-based Compensation Award, Tranche Two | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Share-based Compensation Award, Tranche Two | Capital lease obligations | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Share-based Compensation Award, Tranche Three | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Share-based Compensation Award, Tranche Three | Capital lease obligations | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increments			33.33%
Subsequent event | Key Employees | Total Shareholder Return Awards (TSR)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash paid to settle awards	$ 500

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Impact of Stock-Based Compensation in Consolidated and Combined Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation cost for awards	$ 4,096	$ 4,467
Future tax benefit	888	965
Compensation costs for equity-based awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation cost for awards	3,490	2,863
Compensation costs for liability-based awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation cost for awards	$ 606	$ 1,604

Stock-Based Compensation - Sc_2

Stock-Based Compensation - Schedule of Non-Qualified Stock Options, Activity (Details) - Non-Qualified Stock Options (NQO) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Outstanding at beginning of year (in shares)	325	384	486
Granted (in shares)	0	75	87
Exercised (in shares)	(73)	(110)	(158)
Forfeited, canceled or expired (in shares)	(1)	(24)	(31)
Outstanding at end of year (in shares)	251	325	384
Options exercisable (in shares)	184	201	214
Weighted Average Exercise Price Per Share
Outstanding at beginning of year (in dollars per share)	$ 22.74	$ 21.47	$ 19.25
Granted (in dollars per share)	0	22.82	20.06
Exercised (in dollars per share)	21.87	18.41	13.63
Forfeited, canceled or expired (in dollars per share)	20.62	22.61	22.51
Outstanding at end of year (in dollars per share)	23	22.74	21.47
Options exercisable (in dollars per share)	$ 23.35	$ 22.57	$ 20.35

Stock-Based Compensation - Sc_3

Stock-Based Compensation - Schedule of Non-Qualified Stock Options Outstanding and Exercisable (Details) - Non-Qualified Stock Options (NQO) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	251	325	384	486
Options outstanding, weighted average remaining contractual life	6 years 6 months 29 days
Options outstanding, weighted average price per share (in dollars per share)	$ 23	$ 22.74	$ 21.47	$ 19.25
Options outstanding, aggregate intrinsic value	$ 250
Options exercisable (in shares)	184	201	214
Options exercisable, weighted average remaining contractual life	6 years 1 month 10 days
Options exercisable, weighted average exercise price per share (in dollars per share)	$ 23.35	$ 22.57	$ 20.35
Options exercisable, aggregate intrinsic value	$ 211
Range of exercise prices one
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	172
Options outstanding, weighted average remaining contractual life	6 years 9 months 18 days
Options outstanding, weighted average price per share (in dollars per share)	$ 20.25
Options outstanding, aggregate intrinsic value	$ 250
Options exercisable (in shares)	112
Options exercisable, weighted average remaining contractual life	6 years 2 months 27 days
Options exercisable, weighted average exercise price per share (in dollars per share)	$ 19.69
Options exercisable, aggregate intrinsic value	$ 211
Exercise price per share, lower range (in dollars per share)	$ 12.94
Exercise price per share, upper range (in dollars per share)	$ 21.98
Range of exercise prices two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	79
Options outstanding, weighted average remaining contractual life	6 years 1 month 13 days
Options outstanding, weighted average price per share (in dollars per share)	$ 29
Options outstanding, aggregate intrinsic value	$ 0
Options exercisable (in shares)	72
Options exercisable, weighted average remaining contractual life	5 years 10 months 24 days
Options exercisable, weighted average exercise price per share (in dollars per share)	$ 29.03
Options exercisable, aggregate intrinsic value	$ 0
Exercise price per share, lower range (in dollars per share)	$ 22.16
Exercise price per share, upper range (in dollars per share)	$ 32.49

Stock-Based Compensation - Sc_4

Stock-Based Compensation - Schedule of Weighted Average Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	7 years
Non-Qualified Stock Options (NQO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility		30.80%	30.20%
Expected life (in years)	7 years	7 years	7 years
Risk-free rates		2.30%	1.69%
Weighted-average grant date fair value per share (in dollars per share)		$ 8.48	$ 7.06

Stock-Based Compensation - Sc_5

Stock-Based Compensation - Schedule of Restricted Stock Units, Activity (Details) - Restricted Stock Units (RSUs) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Outstanding at beginning of year (in shares)	221	285	350
Granted (in shares)	163	144	181
Vested (in shares)	(110)	(171)	(206)
Forfeited or canceled (in shares)	(17)	(37)	(40)
Outstanding at end of year (in shares)	257	221	285
Weighted Average Exercise Price Per Share
Outstanding at beginning of year (in dollars per share)	$ 23.58	$ 23.01	$ 22.47
Granted (in dollars per share)	33.08	23.74	21.25
Vested (in dollars per share)	24.93	23.18	20.56
Forfeited or canceled (in dollars per share)	25.54	21.69	22.68
Outstanding at end of year (in dollars per share)	$ 28.90	$ 23.58	$ 23.01

Shareholders' Equity (Details)

Shareholders' Equity (Details)	Dec. 31, 2018shares	Dec. 31, 2017shares	Sep. 18, 2014
Class of Stock [Line Items]
Common stock, shares issued (in shares)	11,266,906	11,120,528
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Vectrus, Inc.
Class of Stock [Line Items]
Common stock, distribution basis for issued and outstanding shares			0.0556
Former parent
Class of Stock [Line Items]
Common stock, shares issued (in shares)	10,474,268
2014 Omnibus Plan
Class of Stock [Line Items]
Maximum number of shares of Company's common stock authorized for issuance (in shares)	2,600,000
Shares available (in shares)	1,100,000

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Feb. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Contract compliance
Loss Contingencies [Line Items]
Contracts loss contingency accrual		$ 7,800	$ 5,800
Subsequent event
Loss Contingencies [Line Items]
Payments for legal settlements	$ 3,750

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 329,561	$ 308,095	$ 321,132	$ 320,516	$ 295,782	$ 269,625	$ 259,318	$ 290,063
Gross Profit	30,030	29,131	29,068	26,466	26,445	24,406	25,735	25,362
Operating income	12,648	14,006	12,998	8,671	10,277	10,090	9,204	11,649	$ 48,323	$ 41,220	$ 42,826
Net income	$ 10,124	$ 9,866	$ 9,195	$ 6,111	$ 41,568	$ 5,800	$ 5,461	$ 6,668	$ 35,296	$ 59,497	$ 23,655
Basic earnings per share (in dollars per share)	$ 0.90	$ 0.88	$ 0.82	$ 0.55	$ 3.77	$ 0.52	$ 0.50	$ 0.61	$ 3.14	$ 5.40	$ 2.21
Diluted earnings per share (in dollars per share)	$ 0.89	$ 0.86	$ 0.81	$ 0.54	$ 3.70	$ 0.51	$ 0.49	$ 0.60	$ 3.10	$ 5.31	$ 2.16
Weighted average number of shares outstanding - basic (in shares)	11,262	11,248	11,235	11,146	11,026	11,075	10,987	10,909	11,224	11,021	10,714
Weighted average number of shares outstanding - diluted (in shares)	11,369	11,406	11,383	11,338	11,234	11,272	11,191	11,075	11,378	11,209	10,974