NN (NNBR) 10-K 2 Apr 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Mar. 27, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	NNBR
Entity Registrant Name	NN INC
Entity Central Index Key	918,541
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		27,579,873
Entity Public Float			$ 473

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 619,793	$ 584,954	$ 405,443
Cost of sales (exclusive of depreciation and amortization shown separately below)	459,080	428,843	320,632
Selling, general and administrative expense	74,112	64,144	34,873
Acquisition related costs excluded from selling, general and administrative expense	344	0	11,682
Depreciation and amortization	52,406	50,721	32,973
Other operating expense (income)	351	809	(24)
Restructuring and integration expense	386	5,658	5,249
Income from operations	33,114	34,779	58
Interest expense	52,085	62,870	29,582
Loss on extinguishment of debt and write-off of unamortized debt issuance costs	42,087	2,589	19,173
Derivative payments on interest rate swap		609
Derivative loss (gain) on change in interest rate swap fair value	(101)	2,448
Other (income) expense, net	(2,084)	(2,871)	521
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(58,873)	(30,866)	(49,218)
Benefit for income taxes	79,026	15,438	19,842
Share of net income from joint venture	5,211	5,938	5,001
Income (loss) from continuing operations	25,364	(9,490)	(24,375)
Income from discontinued operations, net of tax (Note 2)	137,688	16,153	17,889
Net income (loss)	163,052	6,663	(6,486)
Other comprehensive income (loss):
Change in fair value of interest rate swap		1,910	(1,637)
Reclassification adjustment for discontinued operations	(9,243)
Foreign currency translation gain (loss)	22,094	(10,623)	(24,903)
Other comprehensive income (loss):	12,851	(8,713)	(26,540)
Comprehensive income (loss)	$ 175,903	$ (2,050)	$ (33,026)
Basic net income (loss) per share:
Income (loss) from continuing operations per share	$ 0.92	$ (0.35)	$ (1.15)
Income from discontinued operations per share	5.02	0.60	0.84
Net income (loss) per share	$ 5.94	$ 0.25	$ (0.31)
Weighted average shares outstanding	27,433	27,016	21,181
Diluted net income (loss) per share:
Income (loss) from continuing operations per share	$ 0.91	$ (0.35)	$ (1.15)
Income from discontinued operations per share	4.96	0.60	0.84
Net income (loss) per share	$ 5.87	$ 0.25	$ (0.31)
Diluted shares outstanding	27,755	27,016	21,181
Cash dividends per common share	$ 0.28	$ 0.28	$ 0.28

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 224,446	$ 6,271
Accounts receivable, net	108,446	93,433
Inventories	82,617	67,137
Income tax receivable	43,253	1,741
Current assets of discontinued operations		106,717
Other current assets	18,518	7,029
Total current assets	477,280	282,328
Property, plant and equipment, net	259,280	230,093
Goodwill	454,612	443,529
Intangible assets, net	237,702	254,263
Investment in joint venture	39,822	36,008
Non-current assets of discontinued operations		103,940
Other non-current assets	6,307	8,113
Total assets	1,475,003	1,358,274
Current liabilities:
Accounts payable	52,990	44,690
Accrued salaries, wages and benefits	21,145	17,226
Current maturities of long-term debt	17,283	12,751
Current liabilities of discontinued operations		45,249
Other current liabilities	17,003	20,325
Total current liabilities	108,421	140,241
Deferred tax liabilities	71,564	96,018
Non-current income tax payable	5,593
Long-term debt, net of current portion	790,805	785,713
Non-current liabilities of discontinued operations		12,611
Other non-current liabilities	12,516	14,300
Total liabilities	988,899	1,048,883
Commitments and contingencies (Note 14)
Stockholders' equity:
Common stock - $0.01 par value, authorized 45,000 shares, issued and outstanding 27,572 in 2017 and 27,249 in 2016	275	272
Additional paid-in capital	292,494	284,508
Retained earnings	211,080	55,175
Accumulated other comprehensive income (loss)	(17,745)	(30,596)
Non-controlling interest		32
Total stockholders' equity	486,104	309,391
Total liabilities and stockholders' equity	$ 1,475,003	$ 1,358,274

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	45,000	45,000
Common Stock, shares issued	27,572	27,572
Common Stock, shares outstanding	27,249	27,249

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Non-controlling Interest [Member]
Beginning Balance at Dec. 31, 2014	$ 172,989	$ 190	$ 99,095	$ 69,015	$ 4,657	$ 32
Beginning Balance, Shares at Dec. 31, 2014		18,983
Net income (loss)	(6,486)			(6,486)
Dividends declared	(6,433)			(6,433)
Share-based compensation expense	4,039	$ 1	4,038
Share-based compensation expense, shares		115
Shares issued for option exercises	2,041	$ 2	2,039
Shares issued for option exercises, shares		179
Shares issued in public offering	173,052	$ 76	172,976
Shares issued in public offering, shares		7,590
Restricted shares forgiven for taxes	(231)		(231)
Restricted shares forgiven for taxes and forfeited, shares		(18)
Foreign currency translation gain (loss)	(24,903)				(24,903)
Change in fair value of interest rate swap	(1,637)				(1,637)
Ending Balance at Dec. 31, 2015	312,431	$ 269	277,917	56,096	(21,883)	32
Ending Balance, Shares at Dec. 31, 2015		26,849
Net income (loss)	6,663			6,663
Dividends declared	(7,584)			(7,584)
Share-based compensation expense	3,935		3,935
Share-based compensation expense, shares		142
Shares issued for option exercises	2,832	$ 3	2,829
Shares issued for option exercises, shares		270
Restricted shares forgiven for taxes	(173)		(173)
Restricted shares forgiven for taxes and forfeited, shares		(12)
Foreign currency translation gain (loss)	(10,623)				(10,623)
Change in fair value of interest rate swap	1,910				1,910
Ending Balance at Dec. 31, 2016	309,391	$ 272	284,508	55,175	(30,596)	32
Ending Balance, Shares at Dec. 31, 2016		27,249
Net income (loss)	163,052			163,052
Dividends declared	(7,887)			(7,887)
Share-based compensation expense	5,496	$ 1	5,495
Share-based compensation expense, shares		85
Shares issued for option exercises	$ 3,110	$ 2	3,108
Shares issued for option exercises, shares	263	263
Sale of PBC Business (Note 2)	$ (9,275)				(9,243)	$ (32)
Restricted shares forgiven for taxes	(617)		(617)
Restricted shares forgiven for taxes and forfeited, shares		(25)
Foreign currency translation gain (loss)	22,094				22,094
Adoption of new accounting standard (Note 1)	740			740
Ending Balance at Dec. 31, 2017	$ 486,104	$ 275	$ 292,494	$ 211,080	$ (17,745)
Ending Balance, Shares at Dec. 31, 2017		27,572

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)		$ 163,052	$ 6,663	$ (6,486)
Adjustments to reconcile net income to net cash provided by (used by) operating activities:
Depreciation and amortization of continuing operations		52,406	50,721	32,973
Depreciation and amortization of discontinued operations		7,722	11,852	11,496
Amortization of debt issuance costs		4,296	4,168	1,754
Write-off of debt issuance costs		10,502	2,589	19,173
Total derivative mark-to-market loss (gain), net of cash settlements		(1,483)	2,563
Allowance for doubtful accounts		699	142	745
Share of net income from joint venture, net of cash dividends received		(1,284)	(2,232)	(3,672)
Loss (gain) on disposals of property, plant and equipment		(54)	288	(687)
Gain on disposal of discontinued operations, net of tax and cost to sell		(133,665)
Compensation expense from issuance of share-based awards		4,730	3,935	4,039
Deferred income taxes		(23,195)	(15,526)	(19,143)
Other		(545)	(122)
Changes in operating assets and liabilities:
Accounts receivable		(11,374)	(18,505)	(2,492)
Inventories		(10,278)	4,377	(1,843)
Other current assets		(1,389)	(522)	(79)
Other non-current assets		(3)	2,381	(559)
Accounts payable		4,118	7,633	(7,963)
Income taxes payable (receivable)		(124,389)	(217)	2,631
Other liabilities		316	9,164	3,441
Net cash provided by (used by) operating activities		(59,818)	69,352	33,328
Cash flows from investing activities:
Acquisition of property, plant and equipment		(43,722)	(43,820)	(38,553)
Proceeds from measurement period adjustments to previous acquisition			1,635
Proceeds from disposals of property, plant and equipment		646	839	2,995
Short term investment		(8,000)
Proceeds from sale of business, net of cash sold		371,436
Cash paid to acquire businesses, net of cash received		(38,434)		(628,281)
Capital contributions to joint venture				(1,999)
Proceeds from insurance claim		545	122
Net cash provided by (used by) investing activities		282,471	(41,224)	(665,838)
Cash flows from financing activities:
Debt issue costs paid		(8,650)	(3,952)	(35,189)
Dividends paid		(7,695)	(7,584)	(6,433)
Proceeds from long-term debt		322,000	44,000	885,000
Repayment of long-term debt		(314,313)	(55,000)	(401,438)
Proceeds from (repayments of) short-term debt, net		(4,211)	(456)	(84)
Proceeds from shares issued				173,052
Proceeds from exercise of stock options		3,110	2,832	2,041
Shares withheld to satisfy income tax withholding		(617)	(173)	(231)
Principal payments on capital leases		(3,875)	(4,148)	(5,098)
Net cash provided by (used by) financing activities		(14,251)	(24,481)	611,620
Effect of exchange rate changes on cash flows		1,639	(4,329)	(1,340)
Net change in cash and cash equivalents		210,041	(682)	(22,230)
Cash and cash equivalents at beginning of period (1)	[1]	14,405	15,087	37,317
Cash and cash equivalents at end of period (1)	[1]	224,446	14,405	15,087
Supplemental schedule of non-cash operating, investing and financing activities:
Dividends accrued for performance share units		192
Property, plant and equipment acquired with capital leases		1,436
Restructuring charges in other current and non-current liabilities		222	3,238	2,959
Supplemental disclosures:
Cash paid for interest		52,083	59,158	20,146
Cash paid for income taxes		$ 72,294	$ 889	$ 6,377
[1]	(1) Cash and cash equivalents includes $8.1 million, $3.7 million, and $9.1 million of cash and cash equivalents that was included in current assets of discontinued operations as of December 31, 2016, 2015, and 2014, respectively.

Consolidated Statements of Cas7

Consolidated Statements of Cash Flows (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
Cash included in current assets of discontinued operations	$ 8,134,000	$ 3,700,000	$ 9,100,000

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1. Significant Accounting Policies Nature of Business NN, Inc. is a global diversified industrial company that combines advanced engineering and production capabilities with in-depth Form 10-K, the Basis of Presentation The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”). Certain prior period amounts have been reclassified to conform to the current year’s presentation. Historical periods presented reflect discontinued operations (see Note 2). Historical periods also reflect revisions related to prior period misstatements (see Prior Periods’ Financial Statement Revision) identified in the current year (see Note 21). In management’s opinion, the accompanying consolidated financial statements reflect all adjustments necessary to fairly present our results of operations, financial position, and cash flows for the periods presented. Except for per share data or as otherwise indicated, all dollar amounts presented in the tables in these Notes to Consolidated Financial Statements are in thousands of U.S. dollars. Principles of Consolidation Our consolidated financial statements include the accounts of NN, Inc. and its wholly owned subsidiaries. We own a 49% interest in a joint venture which we account for using the equity method (see Note 10). All intercompany transactions and balances have been eliminated in consolidation. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of certain assets and liabilities, disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Prior Periods’ Financial Statement Revision In connection with the preparation of our consolidated financial statements for the year ended December 31, 2017, and the preparation of our interim financial statements, we identified various misstatements in our previously issued 2016 and 2015 annual financial statements and interim periods in 2016 and 2017. These prior period errors relate primarily to the (i) accounting for income and franchise taxes, (ii) accounting for the gain on the disposition of PBC Business, (iii) accounting for indemnification assets related to a prior acquisition, (iv) accounting for foreign currency transactions, (v) accounting for the translation of foreign subsidiary assets and joint venture, and (vi) other immaterial errors, including errors that had previously been adjusted for as out of period corrections in the period identified. We have assessed the materiality of the misstatements on the 2016 and 2015 financial statements in accordance with SEC Staff Accounting Bulletin (“SAB”) Topic 1.M, Materiality Accounting Changes and Error Corrections Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements The accompanying notes to the consolidated financial statements reflect the impact of this revision. We have also reflected the impact of the revision in the applicable unaudited quarterly financial results. Refer to Note 20 and 21 for reconciliations between as originally reported and as revised annual and quarterly amounts, respectively. Accounting Standards Recently Adopted Stock Compensation. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. paid-in 2016-09. Inventory. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory, 2015-11 2015-11 Tax Reform Estimates. one-time one-year Accounting Standards Not Yet Adopted Revenue Recognition. The standard is effective for us beginning January 1, 2018, with full retrospective or modified retrospective adoption permitted. We will adopt the standard utilizing the modified retrospective transition method. Under this transition method, we will recognize the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2018, and will apply the new standard beginning with the most current period presented to contracts that are not completed at the date of initial application. We expect the adoption adjustment to be less than $0.1 million, which represents the net profit on certain contracts that were accounted for on a consignment basis prior to the new guidance but do not meet the consignment criteria under the new standard. We expect to utilize certain practical expedients allowed by the new standard. We intend to utilize the portfolio approach practical expedient to evaluate sales-related discounts on a portfolio basis to contracts with similar characteristics. We expect that the effect on our financial statements of applying the portfolio approach would not differ materially from applying the new standard to individual contracts. Leases. 2016-02, Leases 2016-02 Leases, Leases. 2016-02 right-of-use off-balance Statement of Cash Flows. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) The new cash flow guidance states that cash payments for debt prepayment costs should be classified as cash outflows for financing activities. We paid $31.6 million for debt prepayment costs in 2017 as discussed in Note 12. These debt prepayment costs are classified as cash outflows from operating activities in 2017. Under the new guidance, these costs will be reclassified to cash outflows from financing activities. The new guidance also requires entities to make an accounting policy election regarding classification of distributions received from equity method investees. Existing guidance does not currently address how an entity should determine which distributions represent returns on versus returns of investment. The lack of specific guidance has resulted in diversity in practice. The two allowable approaches are the “cumulative earnings” approach and the “nature of the distribution” approach, as defined by ASU 2016-15. Goodwill. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, Effects of Tax Reform in Other Comprehensive Income. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, 2018-02 Definition of a Business. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business, Cash and Cash Equivalents Cash and cash equivalents include cash and highly liquid investments with original maturities of three months or less. Fair Value Measurements Fair value principles prioritize valuation inputs across three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the assumptions used to measure assets and liabilities at fair value. An asset or liability’s classification within the various levels is determined based on the lowest level input that is significant to the fair value measurement. Accounts Receivable and Allowance for Doubtful Accounts Trade accounts receivable are recorded at the invoiced amount upon recognition of a sale of goods when ownership and risk of loss is assumed by the customer. We maintain allowances for doubtful accounts for estimated losses resulting from the inability of our customers to make required payments. The allowances are based on the number of days an individual receivable is past the invoice due date and on regular credit evaluations of our customers. In evaluating the credit worthiness of our customers, we consider numerous inputs including but not limited to the customers’ financial position, past payment history, relevant industry trends, cash flows, management capability, historical loss experience and economic conditions and prospects. Allowances are established when customer accounts are at risk of being uncollectible. Accounts receivable are written off at the time a customer receivable is deemed uncollectible. Inventories Inventories are stated at the lower of cost or net realizable value. Cost is determined using standard costs, which approximates the average cost method. Our policy is to expense abnormal amounts of idle facility expense, freight, handling cost, and waste included in cost of products sold. In addition, we allocate fixed production overheads based on the normal production capacity of our facilities. Inventory valuations were developed using normalized production capacities for each of our manufacturing locations. The costs from excess capacity or under-utilization of fixed production overheads were expensed in the period incurred and are not included as a component of inventory. Inventories also include tools, molds and dies in progress that we are producing and will ultimately sell to our customers. These inventories are also carried at the lower of cost or net realizable value. Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation. Assets to be disposed of are stated at the lower of depreciated cost or fair market value less estimated selling costs. Expenditures for maintenance and repairs are charged to expense as incurred. Major renewals and betterments are capitalized. When a property item is retired, its cost and related accumulated depreciation are removed from the property accounts and any gain or loss is recorded in the consolidated Statements of Operations and Comprehensive Income (Loss). We review the carrying values of long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Property, plant and equipment also includes tools, molds and dies used in manufacturing. Depreciation is calculated based on historical cost using the straight-line method over the estimated useful lives of the depreciable assets. Estimated useful lives for buildings generally range from 15 to 40 years. Estimated useful lives for machinery and equipment generally range from 3 to 12 years. We depreciate leasehold improvements and buildings under capital lease over the shorter of the leased asset’s useful life or the lease term. Goodwill and Other Indefinite Lived Intangible Assets Goodwill is tested for impairment on an annual basis in the fourth quarter and between annual tests if a triggering event occurs. The impairment analysis is performed at the reporting unit level. We have the option to make a qualitative assessment of whether it is more-likely-than-not two-step two-step two-step If the qualitative assessment indicates it is more likely than not that the fair value is less than the carrying value, GAAP prescribes a two-step If the carrying value of the reporting unit including goodwill is less than fair value of the reporting unit, the goodwill is not considered impaired. If the carrying value is greater than fair value then the potential for impairment of goodwill exists. The potential impairment is determined by allocating the fair value of the reporting unit among the assets and liabilities based on a purchase price allocation methodology as if the reporting unit was acquired in a business combination. The fair value of the goodwill is implied from this allocation and compared to the carrying value with an impairment loss recognized if the carrying value is greater than the implied fair value. We base our fair value estimates, in large part, on management business plans and projected financial information which are subject to a high degree of management judgment and complexity. Actual results may differ from projections, and the differences may be material. Impairment of Long-Lived Assets Long-lived tangible and intangible assets subject to amortization are tested for recoverability when changes in circumstances indicate the carrying value of these assets may not be recoverable. A test for recoverability is also performed when management has committed to a plan to dispose of a reporting unit or asset group. Assets to be held and used are tested for recoverability when indications of impairment are evident. Recoverability of a long-lived tangible or intangible asset is evaluated by comparing its carrying value to the future estimated undiscounted cash flows expected to be generated by the asset or asset group. If the asset is not recoverable the asset is considered impaired and adjusted to fair value which is then depreciated or amortized over its remaining useful life. Assets to be disposed of are recorded at the lesser of carrying value or fair value less costs of disposal. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. Provision has not been made for income taxes on unremitted earnings of foreign subsidiaries as these earnings are deemed to be permanently reinvested. We recognize income tax positions that meet the more likely than not threshold and accrue interest and potential penalties related to unrecognized income tax positions which are recorded as a component of the provision (benefit) for income taxes. Revenue Recognition We recognize revenues based on the stated shipping terms with customers when these terms are satisfied and the risks of ownership are transferred to the customers. We have an inventory management program for certain customers whereby revenue is recognized when products are used by customers from consigned stock rather than at the time of shipment. Under both circumstances, revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the sellers’ price is fixed and determinable, and collectability is reasonably assured. Share Based Compensation The cost of stock options, restricted stock and performance share units are recognized as compensation expense over the vesting periods based on the grant date fair value, net of expected forfeitures. We determine grant date fair value using the Black Scholes financial pricing model for our stock options and a Monte Carlo simulation for the performance share units because these awards are not traded in open markets. We account for restricted stock by recognizing compensation expense ratably over the vesting period as specified in the award agreement. Compensation expense to be recognized is based on the closing stock price on the date of grant. Upon the adoption of ASU 2016-09 Foreign Currency Translation Assets and liabilities of our foreign subsidiaries are translated at current exchange rates. Revenue, costs and expenses are translated at average rates prevailing during each reporting period. Translation adjustments arising from the translation of foreign subsidiary financial statements are reported as a component of other comprehensive income and accumulated other comprehensive income (“AOCI”) within stockholders’ equity. Transactions denominated in foreign currencies, including intercompany transactions, are initially recorded at the current exchange rate at the date of the transaction. The balances are adjusted to the current exchange rate as of each balance sheet date and as of the date when the transaction is consummated. Transaction gains or losses, excluding intercompany loan transactions, are expensed as incurred in either cost of products sold or selling, general and administrative expense in the Consolidated Statements of Operations and Comprehensive Income (Loss) and were immaterial to the years ended December 31, 2017, 2016 and 2015. Transaction gains or losses on intercompany loan transactions are recognized as incurred in the “Other (income) expense, net” line in the Consolidated Statements of Operations and Comprehensive Income (Loss). Net Income Per Common Share Basic income per share reflects reported earnings divided by the weighted average number of common shares outstanding. Diluted income per share includes the effect of dilutive stock options and the respective tax benefits, unless inclusion would not be dilutive. Business Combinations We allocate the total purchase price of tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the business combination date, with the excess purchase price recorded as goodwill. The purchase price allocation process requires us to use significant estimates and assumptions, including fair value estimates, as of the business combination date. Although we believe the assumptions and estimates we have made are reasonable and appropriate, they are based in part on historical experience and information obtained from management of the acquired company. Our assumptions and estimates are also partially based on valuation models that incorporate projections of expected future cash flows and operating plans and are inherently uncertain. Valuations are performed by management or third-party valuation specialists under management’s supervision. In determining the fair value of assets acquired and liabilities assumed in business combinations, as appropriate, we may use one of the following recognized valuation methods: the income approach (including discounted cash flows from relief from royalty and excess earnings model), the market approach, or the replacement cost approach. Examples of significant estimates used to value certain intangible assets acquired include but are not limited to: • sales volume, pricing and future cash flows of the business overall; • future expected cash flows from customer relationships, and other identifiable intangible assets, including future price levels, rates of increase in revenue and appropriate attrition rate; • the acquired company’s brand and competitive position, royalty rate quantum, as well as assumptions about the period of time the acquired brand will continue to benefit to the combined company’s product portfolio; and • cost of capital, risk-adjusted discount rates and income tax rates. Different assumptions regarding projected performance and other factors associated with the acquired assets may affect the amount recorded under each type of asset and liability. The valuations of property, plant and equipment, intangible assets, goodwill and deferred income tax liabilities depend heavily on assumptions. Subsequent assessment could result in future impairment charges. We refine these estimates over a measurement period not to exceed one year to reflect new information obtained surrounding facts and circumstances existing at the acquisition date.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Note 2. Discontinued Operations On August 17, 2017, we completed the sale of our PBC Business to TSUBAKI NAKASHIMA, Co., Ltd. for a base purchase price of $375.0 million in cash, subject to certain adjustments. After working capital and other closing adjustments, the final cash purchase price was approximately $388.5 million. We received cash proceeds at closing of $387.6 million and recorded a $0.8 million receivable at December 31, 2017, for the balance. The PBC Business included all our facilities that were engaged in the production of precision steel balls, steel rollers, and metal retainers and automotive specialty products used primarily in the bearing industry. The sale of the PBC Business furthers management’s long-term strategy to build a diversified industrial business with a comprehensive geographic footprint in attractive high-growth market segments. The PBC Business represented all of the PBC reportable segment disclosed in our historical financial statements. Under the terms of a transition services agreement, we are providing certain support services for twelve months from the closing date of the sale. We recorded an after-tax non-controlling In accordance with ASC 205-20, Presentation of Financial Statements – Discontinued Operations, The following table summarizes the major line items included in the results of operations of the discontinued operations. Year Ended December 31, 2017 (1) 2016 2015 Net sales $ 168,287 $ 248,534 $ 261,837 Cost of products sold (exclusive of depreciation and 130,555 192,994 205,361 Selling, general and administrative expense 11,818 16,992 17,468 Depreciation and amortization 7,722 11,852 11,496 (Gain) loss on disposal of assets — 27 — Restructuring and integration expense 429 4,366 2,019 Income from operations 17,763 22,303 25,493 Interest income (expense) (181 ) (284 ) (317 ) Interest and other income (expense) (84 ) 503 (654 ) Income from discontinued operations before gain on disposal 17,498 22,522 24,522 Provision for income taxes on discontinued operations (7,461 ) (6,369 ) (6,633 ) Income from discontinued operations before gain on disposal 10,037 16,153 17,889 Gain on disposal of discontinued operations 213,503 — — Provision for income taxes on gain on disposal (85,852 ) — — Income from discontinued operations, net of tax $ 137,688 $ 16,153 $ 17,889 (1) Includes the results of operations of the PBC Business from January 1 to August 17, 2017. The following table summarizes the carrying amounts of major classes of assets and liabilities of discontinued operations for each of the periods presented. As of December 31, 2017 2016 Cash $ — $ 8,134 Accounts receivable, net — 46,114 Inventories — 47,714 Other current assets — 4,755 Total current assets of discontinued operations — 106,717 Property, plant and equipment, net — 92,373 Goodwill — 8,909 Intangible assets, net — 1,718 Other non-current — 940 Total non-current — 103,940 Total assets of discontinued operations $ — $ 210,657 Accounts payable $ — $ 31,014 Accrued salaries, wages and benefits — 9,234 Income taxes payable — 2,825 Other current liabilities — 2,176 Total current liabilities of discontinued operations — 45,249 Deferred tax liabilities — 4,173 Accrued post-employment benefits — 4,707 Other non-current — 3,731 Total non-current — 12,611 Total liabilities of discontinued operations $ — $ 57,860 The following table presents the significant noncash items and cash paid for capital expenditures of discontinued operations for each period presented. Year Ended December 31, 2017 2016 2015 Depreciation and amortization $ 7,722 $ 11,852 $ 11,496 Acquisition of property, plant and equipment $ 7,316 $ 11,926 $ 15,111

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Acquisitions	Note 3. Acquisitions NN Life Sciences – Vandalia LLC, Formerly Known as DRT Medical, LLC On October 2, 2017, we acquired 100% of the membership interests of DRT Medical, LLC, which we subsequently renamed NN Life Sciences – Vandalia, LLC (“Vandalia”) for approximately $38.7 million in cash, after preliminary working capital post-closing adjustments of $0.3 million. Vandalia is a supplier of precision manufactured medical instruments and orthopedic implants with locations in Ohio and Pennsylvania. Operating results of Vandalia after the acquisition date are included in our PEP segment. We accounted for the Vandalia acquisition using the acquisition method of accounting. The preliminary allocation of the purchase price was determined by management with the assistance of third-party valuation specialists and was based on estimates of the fair value of assets acquired and liabilities assumed as of October 2, 2017. The purchase price allocation for the acquisition is preliminary and subject to completion of working capital adjustments. The following table summarizes the components of the preliminary purchase price allocation for the Vandalia Acquisition. Fair value of assets acquired and liabilities assumed As of Current assets $ 10,166 Property, plant and equipment 13,981 Intangible assets subject to amortization 6,900 Other non-current 29 Goodwill 9,452 Total assets acquired 40,528 Current liabilities 1,794 Total liabilities assumed 1,794 Net assets acquired $ 38,734 A combination of income, market, and cost approaches were used for the valuation where appropriate, depending on the asset or liability being valued. Valuation inputs in these models and analyses gave consideration to market participant assumptions. Acquired intangible assets are primarily customer relationships, and trade names. As of December 31, 2017, intangible assets in connection with Vandalia were $6.9 million. In connection with the Vandalia acquisition, we recorded goodwill, which represents the excess of the purchase price over the estimated fair value of tangible and intangible assets acquired, net of liabilities assumed. As of December 31, 2017, goodwill in connection with Vandalia was approximately $9.5 million. The goodwill is attributed primarily to the assembled workforce. All of the goodwill is expected to be deducted for tax purposes. Property, plant and equipment acquired primarily included machinery and equipment for use in manufacturing operations. Additionally, manufacturing sites and related facilities including leasehold improvements were acquired. Property, plant and equipment has been valued using both the cost approach and the market approach supported where available by observable market data which includes consideration of obsolescence. Intangible assets have been valued using the relief from royalty and multi-period excess earnings methods, both forms of the income approach supported by market data. We incurred approximately $0.3 million in acquisition related costs with respect to Vandalia during the year ended December 31, 2017. Transaction costs were expensed as incurred and are included in the “Acquisition related costs excluded from selling, general and administrative expense” line item in the Consolidated Statements of Operations and Comprehensive Income (Loss). As required by the acquisition method of accounting, acquired inventories were recorded at their estimated fair value. Beginning October 2, 2017, our consolidated results of operations include the results of Vandalia. Since the date of the acquisition, sales revenue of $6.7 million and loss from continuing operations of $0.5 million has been included in our consolidated financial statements. Precision Engineered Products Holdings, Inc. We completed the acquisition (the “PEP Acquisition”) of Precision Engineered Products Holdings, Inc. (“PEP”) on October 19, 2015. During 2016, we finalized all issues related to customary working capital adjustments, fixed assets and income taxes. The changes primarily arose from differences noted during acquisition integration and finalizing return to provision adjustments. As a result, we adjusted the preliminary allocation of the purchase price initially recorded at the PEP Acquisition date to reflect these measurement period adjustments. The following table summarizes the final purchase price allocation for the PEP Acquisition. As of Subsequent Final as of Consideration: Cash paid $ 621,196 $ — $ 621,196 Cash adjustment — (1,635 ) (1,635 ) Total consideration $ 621,196 $ (1,635 ) $ 619,561 Fair value of assets acquired and liabilities assumed Current assets $ 69,331 $ 452 $ 69,783 Property, plant and equipment 56,163 (962 ) 55,201 Intangible assets subject to amortization 240,490 — 240,490 Other non-current 1,500 — 1,500 Goodwill (1) 372,709 (1,805 ) 370,904 Total assets acquired 740,193 (2,315 ) 737,878 Current liabilities (2) 21,354 — 21,354 Non-current 95,435 (680 ) 94,755 Other non-current 2,208 — 2,208 Total liabilities assumed 118,997 (680 ) 118,317 Net assets acquired $ 621,196 $ (1,635 ) $ 619,561 (1) Goodwill includes $8.3 million of prior period revisions (Note 1 and Note 21). (2) Current liabilities include $0.2 million of prior period revisions (Note 1 and Note 21). (3) Non-current (4) Other non-current

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	Note 4. Segment Information We determined our reportable segments under the provisions of U.S. GAAP related to disclosures about segments of an enterprise. Our reportable segments are based on differences in product lines. Our business has historically been aggregated into three reportable segments: PBC, APC, and PEP. See Note 2 for information regarding the sale of the PBC Business on August 17, 2017. The results of the PBC Business are classified as discontinued operations for all periods in the consolidated financial statements and accompanying notes unless otherwise stated. Accordingly, results of the PBC Business are not included in the tabular presentation below. Within our APC segment, we manufacture highly engineered, difficult-to-manufacture Within our PEP segment, we combine materials science expertise with advanced engineering and production capabilities to design and manufacture a broad range of high-precision metal and plastic components, assemblies, and finished devices for the medical and life sciences, electrical, automotive, general industrial and aerospace and defense end markets. Note 22 includes discussion of our announcement subsequent to December 31, 2017, to implement a new enterprise and management structure by organizing our business into three segments beginning in 2018. The following table presents results of continuing operations for each reportable segment. There were no significant inter-segment transactions during the periods presented. Autocam Precision Corporate Total Year Ended December 31, 2017 Net sales $ 336,852 $ 282,941 $ — $ 619,793 Depreciation and amortization $ 24,491 $ 26,745 $ 1,170 $ 52,406 Income from operations $ 34,405 $ 36,711 $ (38,002 ) $ 33,114 Interest expense (52,085 ) Other (39,902 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (58,873 ) Share of net income from joint venture $ 5,211 $ 5,211 Expenditures for long-lived assets $ 24,056 $ 5,443 $ 6,907 $ 36,406 Year Ended December 31, 2016 Net sales $ 326,138 $ 258,816 $ — $ 584,954 Depreciation and amortization $ 22,189 $ 28,105 $ 427 $ 50,721 Income from operations $ 29,490 $ 33,900 $ (28,611 ) $ 34,779 Interest expense (62,870 ) Other (2,775 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (30,866 ) Share of net income from joint venture $ 5,938 $ 5,938 Expenditures for long-lived assets $ 23,077 $ 5,352 $ 3,465 $ 31,894 Year Ended December 31, 2015 Net sales $ 328,260 $ 77,183 $ — $ 405,443 Depreciation and amortization $ 21,472 $ 11,282 $ 219 $ 32,973 Income from operations $ 30,810 $ (3,806 ) $ (26,946 ) $ 58 Interest expense (29,582 ) Other (19,694 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (49,218 ) Share of net income from joint venture $ 5,001 $ 5,001 Expenditures for long-lived assets $ 21,341 $ 728 $ 1,373 $ 23,442 Total Assets as of December 31, 2017 2016 2015 Autocam Precision Components Group (1) $ 428,321 $ 412,692 $ 416,504 Precision Engineered Products Group 738,766 720,362 747,804 Corporate and Consolidations 307,916 225,220 224,029 Total $ 1,475,003 $ 1,358,274 $ 1,388,337 (1) Total assets of our APC segment include $39.8 million, $36.0 million, and $36.3 million as of December 31, 2017, 2016, and 2015, respectively, related to the investment in our 49% owned joint venture (Note 10). Acquisition related costs for the Vandalia acquisition in 2017 and the PEP and Caprock acquisitions in 2015 are reported under Corporate and Consolidations. These costs impacted income from operations at Corporate by $0.3 million and $10.9 million for the years ended December 31, 2017 and 2015, respectively. We incurred no acquisition related costs in 2016. Beginning October 2, 2017, our PEP segment includes the results of the Vandalia acquisition. During 2017 since the date of the Vandalia acquisition, net sales revenue of $6.7 million and loss from operations of $0.5 million (including $0.9 million for a one-time step-up) one-time step-up, The following table summarizes sales to external customers and long-lived tangible assets by geographical region. Net Sales Year Ended December 31, Property, Plant, and Equipment, Net 2017 2016 2015 2017 2016 United States $ 437,838 $ 407,917 $ 275,152 $ 173,269 $ 155,784 Europe $ 40,334 $ 36,481 $ 32,736 $ 25,288 $ 21,069 Asia 62,657 64,177 46,092 26,078 19,936 Canada 2,176 1,921 861 — — Mexico 40,937 45,863 27,023 7,544 5,821 S. America 35,845 28,595 23,558 27,101 27,483 Other 6 — 21 — — All foreign countries $ 181,955 $ 177,037 $ 130,291 $ 86,011 $ 74,309 Total $ 619,793 $ 584,954 $ 405,443 $ 259,280 $ 230,093

Accounts Receivable and Sales C

Accounts Receivable and Sales Concentrations	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Accounts Receivable and Sales Concentrations	Note 5. Accounts Receivable and Sales Concentrations Accounts receivable, net, are comprised of the following amounts: As of December 31, 2017 2016 Trade $ 110,165 $ 94,502 Less - allowance for doubtful accounts 1,719 1,069 Accounts receivable, net $ 108,446 $ 93,433 The following table presents activity in the allowance for doubtful accounts. Balance at Additions Write- Currency Balance at Year Ended December 31, 2017 $ 1,069 $ 648 $ (101 ) $ 103 $ 1,719 Year Ended December 31, 2016 $ 1,055 $ 153 $ (59 ) $ (80 ) $ 1,069 Year Ended December 31, 2015 $ 362 $ 729 $ (8 ) $ (28 ) $ 1,055 No customers accounted for more than 10% of our net sales in 2017. For the years ended December 31, 2016 and 2015, sales to Robert Bosch Automotive Systems (“Bosch”) amounted to $59.2 million, and $73.0 million, respectively, or 10%, and 18% of consolidated net sales, respectively. All revenues related to Bosch are in the APC segment. No customers represented more than 10% of accounts receivable as of December 31, 2017 or 2016.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2017
Inventory Disclosure [Abstract]
Inventories	Note 6. Inventories Inventories are comprised of the following amounts: As of December 31, 2017 2016 Raw materials $ 37,337 $ 36,080 Work in process 27,669 22,645 Finished goods 17,611 8,412 Inventories $ 82,617 $ 67,137

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 7. Property, Plant and Equipment Property, plant and equipment are comprised of the following amounts: As of December 31, 2017 2016 Land and buildings $ 54,833 $ 51,992 Machinery and equipment 302,470 251,295 Construction in progress 14,346 10,786 371,649 314,073 Less—accumulated depreciation 112,369 83,980 Property, plant and equipment, net $ 259,280 $ 230,093 During the year ended December 31, 2017, we acquired $14.0 million in property, plant and equipment with the Vandalia acquisition. During the year ended December 31, 2015, we acquired $58.1 million in property, plant and equipment with the two acquisitions completed during 2015. For the years ended December 31, 2017, 2016, and 2015, depreciation expense was $28.9 million, $24.7 million, and $20.1 million, respectively.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Note 8. Goodwill We completed our annual goodwill impairment review during the fourth quarters of 2017, 2016 and 2015. For the years ended December 31, 2017, 2016 and 2015, we concluded that there were no indicators of impairment at the reporting units with goodwill. The following table shows changes in the carrying amount of goodwill, for the years ended December 31, 2017, 2016 and 2015. Autocam Precision Total Balance as of December 31, 2015 $ 73,864 $ 374,535 $ 448,399 Currency impacts (601 ) (2,464 ) (3,065 ) Adjustments to goodwill — (1,805 ) (1,805 ) Balance as of December 31, 2016 $ 73,263 $ 370,266 $ 443,529 Currency impacts 884 747 1,631 Goodwill acquired in acquisition — 9,452 9,452 Balance as of December 31, 2017 $ 74,147 $ 380,465 $ 454,612 As of December 31, 2017, 2016 and 2015, the balance of goodwill reported in the table above included accumulated impairment charges of $4.3 million and $11.7 million in our APC and PEP segments, respectively, all of which were recorded during the year ended December 31, 2008. The goodwill acquired in 2017 is related to the Vandalia acquisition as described in Note 3 and is derived from the value of the businesses acquired. This fair value was based on management business plans and future performance estimates which are subject to a high degree of management judgment and complexity. Actual results may differ from these projections and the differences may be material, leading to a potential impairment of this goodwill if this reporting unit’s future results are not as forecasted.

Intangible Assets, Net

Intangible Assets, Net	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	Note 9. Intangible Assets, Net Intangible assets are tested for impairment when changes in circumstances indicate the carrying value of those assets may not be recoverable. As of December 31, 2017 and 2016, there were no indications of impairment. As disclosed in Note 3, we added $6.9 million of intangible assets in 2017 related to customer relationships acquired in the Vandalia acquisition with an estimated useful life of 15 years. The following table presents the carrying amount of intangible assets by segment and by major asset class. Autocam Precision Total Balance as of December 31, 2015 $ 46,417 $ 233,800 $ 280,217 Amortization (3,533 ) (22,465 ) (25,998 ) Currency impacts 44 — 44 Balance as of December 31, 2016 $ 42,928 $ 211,335 $ 254,263 Additions — 6,900 6,900 Amortization (3,481 ) (19,979 ) (23,460 ) Currency impacts (1 ) — (1 ) Balance as of December 31, 2017 $ 39,446 $ 198,256 $ 237,702 December 31, 2017 December 31, 2016 Estimated Useful Gross Accumulated Net Gross Accumulated Net Customer relationships 12 - 15 $ 282,030 $ (52,408 ) $ 229,622 $ 275,130 $ (30,137 ) $ 244,993 Other 1 - 15 19,200 (11,120 ) 8,080 19,217 (9,947 ) 9,270 Total identified intangible assets $ 301,230 $ (63,528 ) $ 237,702 $ 294,347 $ (40,084 ) $ 254,263 The following table summarizes estimated amortization expense for the next five years: Year Ending December 31, 2018 $ 23,878 2019 23,810 2020 23,670 2021 23,678 2022 23,678

Investment in Joint Venture

Investment in Joint Venture	12 Months Ended
	Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investment in Joint Venture	Note 10. Investment in Joint Venture We own a 49% investment in a joint venture located in Wuxi, China, called Wuxi Weifu Autocam Precision Machinery Company, Ltd. (the “JV”). The JV is jointly controlled and managed, and we account for it under the equity method. The following table summarizes activity related to our investment in the JV. Balance as of December 31, 2016 $ 36,008 Our share of cumulative earnings 5,582 Dividends declared and paid by joint venture (4,156 ) Accretion of basis difference from purchase accounting (371 ) Foreign currency translation gain 2,759 Balance as of December 31, 2017 $ 39,822 The following tables present summarized financial information of the unconsolidated JV. As of December 31, 2017 2016 Current assets $ 47,600 $ 31,295 Non-current 24,763 22,522 Total assets $ 72,363 $ 53,817 Current liabilities $ 26,165 $ 13,549 Total liabilities $ 26,165 $ 13,549 Year Ended December 31, 2017 2016 2015 Net sales $ 74,805 $ 65,756 $ 55,962 Cost of sales $ 57,514 $ 44,530 $ 37,283 Income from operations $ 13,659 $ 16,268 $ 13,972 Net income $ 11,442 $ 13,702 $ 11,525 We had sales to the JV of $0.2 million, $0.1 million, and $0.2 million in each of the years ended December 31, 2017, 2016, and 2015. Amounts due to us from the JV were $0.1 million, $0.1 million, and $0.2 million as of December 31, 2017, 2016, and 2015, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes On December 22, 2017, the U. S. government enacted comprehensive tax legislation. The U.S. Tax Cuts and Jobs Act of 2017 reduces the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred, and creates new taxes on certain foreign sourced earnings. As a result of the U.S. Tax Cuts and Jobs Act of 2017, we recognized a $51.8 million net tax benefit in 2017. At December 31, 2017, we have made a reasonable estimate of the effects of the one-time transition tax and included this in our provisional amount. The ultimate impact could differ materially from this provisional amount due to, among other things, additional analysis, changes in interpretations and assumptions we have made, and additional interpretive regulatory guidance which may be issued. In accordance with SAB 118, we may record additional provisional amounts during a measurement period not to extend beyond one year of the enactment date of the U.S. Tax Cuts and Jobs Act of 2017. The accounting is expected to be complete when our 2017 U.S. corporate income tax return is filed in 2018, and any measurement period adjustments will be recognized as income tax expense or benefit in 2018. Loss from continuing operations before benefit for income taxes was as follows: Year ended December 31, 2017 2016 2015 Income / (Loss) from continuing operations before expense / (benefit) for income taxes and share of net income from joint venture United States (71,603 ) (39,160 ) (50,831 ) Foreign 12,730 8,294 1,613 Total (58,873 ) (30,866 ) (49,218 ) Total income tax benefit was as follows: Year ended December 31, 2017 2016 2015 Tax Expense: Current: U.S. Federal (47,916 ) (2,595 ) (2,228 ) State (12,226 ) 679 189 Foreign 4,310 2,004 1,340 Total current expense (55,832 ) 88 (699 ) Deferred: U.S. Federal (25,017 ) (9,679 ) (16,007 ) State 3,009 (6,406 ) (1,913 ) Deferred tax valuation allowance 710 1,882 — Foreign (1,896 ) (1,323 ) (1,223 ) Total deferred expense (benefit) (23,194 ) (15,526 ) (19,143 ) Total expense (benefit) (79,026 ) (15,438 ) (19,842 ) A reconciliation of income taxes based on the U.S. federal statutory rate is summarized as follows: Year ended December 31, 2017 2016 2015 Rate Rec: Percentages Income taxes at the federal statutory rate 35.0 % 34.0 % 34.0 % Change in valuation allowance -1.2 % -6.1 % 0.0 % Foreign tax credits, exclusive of tax reform -13.8 % 8.2 % 2.7 % State taxes, net of federal taxes, exclusive of tax reform 9.1 % 5.7 % 3.6 % Non-U.S. earnings taxed at different rates 1.7 % 4.8 % 3.2 % Non-deductible mergers and acquisitions costs 0.0 % 0.0 % -2.6 % R&D Tax credit 0.3 % 0.9 % 1.3 % Change in uncertain tax positions -0.4 % 3.2 % 0.0 % Impact of Tax Reform Toll Charge, net of foreign tax credit -11.5 % 0.0 % 0.0 % Remeasurement of deferred taxes pursuant to tax reform 65.6 % 0.0 % 0.0 % Tax Reform impact on divestiture of business segment 33.9 % 0.0 % 0.0 % Section 199/Domestic Production Deduction 0.8 % 0.0 % 0.0 % Divestiture of Business Segment, exclusive of tax reform 13.6 % 0.0 % 0.0 % Prior period revisions 0.5 % 4.2 % 1.8 % Foreign JV Net Income 0.0 % -4.1 % -2.3 % Other adjustments, net 0.7 % -0.8 % -1.3 % 134.2 % 50.0 % 40.3 % The 2017 effective tax rate of 134.2% was heavily influenced by the remeasurement of our ending domestic deferred balances, an estimate of the one-time transition tax (net of foreign tax credits) on earnings of our foreign subsidiaries in accordance with the U.S. Tax Cuts and Jobs Act of 2017, and the impact of the U.S. Tax Cuts and Jobs Act of 2017 on the divestiture of the PBC Business. The principal components of the deferred tax assets and liabilities are as follows: Summary of Deferred’s Deferred income tax liabilities: Tax in excess of book depreciation 34,143 40,389 39,447 Goodwill 58 23 — Intangible assets 50,688 86,492 91,947 Other deferred tax liabilities 389 720 (0 ) Total deferred income tax liabilities 85,278 127,624 131,394 Deferred income tax assets: Goodwill 2,067 1,165 1,697 Inventories 2,248 740 4,370 Pension/Personnel accruals 1,596 1,395 2,669 Net operating loss carry forwards 6,950 10,297 6,289 Foreign tax credits — 5,759 3,242 Guarantee claim deduction — 414 1,141 Credit carry forwards 3,427 4,581 4,958 Accruals and reserves 2,015 1,151 0 Other deferred tax assets 3,019 10,193 2,084 Deferred income tax assets before Valuation Allowance 21,322 35,695 26,451 Valuation allowance on deferred tax assets (7,608 ) (4,090 ) (2,376 ) Total deferred income tax assets 13,714 31,605 24,075 Net deferred income tax liabilities (1) 71,564 96,019 107,319 (1) In accordance with the U.S. Tax Cuts and Jobs Act of 2017, our ending domestic deferred balances have been remeasured to 21% for the year ended December 31, 2017. As realization of certain deferred tax assets is not assured, management believes it is more likely than not that those net deferred tax assets will be realized. However, the amount of the deferred tax assets considered realizable could be reduced based on changing conditions. The following table summarizes our total valuation allowances: Balance at Additions Recoveries Reprice Balance at Year ended December 31, 2017 $ 4,090 $ 3,518 $ — $ — $ 7,608 Year ended December 31, 2016 $ 2,376 $ 1,882 $ (168 ) $ — $ 4,090 Year ended December 31, 2015 $ — $ 2,376 $ — $ — $ 2,376 During 2017, the valuation allowance increased by approximately $3.5 million. This consisted of a $2.3 million increase due to the uncertainty of realizing certain state net operating loss (NOL) carryforwards, and a $1.2 million increase for foreign NOL’s. During 2016, the valuation allowance increased by approximately $1.7 million, consisting of a $1.9 million increase due to the uncertainty of realizing certain state NOL carryforwards and a decrease of $0.2 million. The decrease reflects the Company’s expectation that it is more likely than not that it will generate future taxable income to utilize this amount of net deferred tax assets. During 2015, the valuation allowance increased by approximately $2.4 million, consisting solely of an increase due to the uncertainty of realizing certain local tax credits of a foreign subsidiary. There has been no change in our long term international expansion plans as of December 31, 2017, and our intent and ability is to indefinitely reinvest our foreign earnings. We base this assertion on two factors. The first factor is our intention to invest in foreign countries that are strategically important to our PEP and APC businesses. Due to the acquisitions completed in 2015 and 2014, we have operations in Mexico, Brazil, Poland, France and China which will require more foreign investment. Second, we have sufficient access to funds in the U.S. through projected free cash flows and the availability of our U.S. credit facilities to fund currently anticipated domestic operational and investment needs. With respect to accumulated earnings of foreign subsidiaries, no additional US federal income taxes have been provided as all accumulated earnings of foreign subsidiaries are deemed to have been remitted as part of the one-time transition tax. The Company continues to evaluate its indefinite reinvestment assertion in light of the U.S. Tax Cuts and Jobs Act of 2017, as the Company could still be subject to foreign withholding taxes, US state taxes, and foreign currency adjustments if this assertion is not maintained. The accounting is expected to be completed within the one-year measurement period as allowed by SAB 118. A reconciliation of the beginning and ending amounts of unrecognized tax benefits, excluding interest and penalties, is as follows: Year Ended December 31, 2017 2016 2015 Beginning balance $ 4,741 $ 5,724 $ 3,834 Additions for tax positions of prior years 1,404 179 2,516 Reductions for tax positions of prior years (490 ) (1,162 ) (626 ) Ending balance $ 5,655 $ 4,741 $ 5,724 As of December 31, 2017, the $5.7 million of unrecognized tax benefits would, if recognized, impact our effective tax rate by $5.2 million. The 2017 addition is related to a foreign NOL. Interest and penalties related to federal, state, and foreign income tax matters are recorded as a component of the provision for income taxes in our Consolidated Statements of Operations. During 2017, we released $0.2 million of previously accrued U.S. interest. During 2016, we released less than $0.1 million of previously accrued foreign interest and accrued $0.2 million in U.S. interest. During 2015, we accrued less than $0.1 million in foreign interest and $0.3 million in U.S. interest. Management believes that it is reasonably possible that the amount of unrecognized income benefits and interest may decrease during the next 12 months by approximately $1.0 million, related to the expiration of the statutes of limitations. As of December 31, 2017, the Company has $81.4 million of state NOL carryovers. The state NOL’s begin to expire in 2030. We also have $26.6 million of foreign NOL carryovers at December 31, 2017. The foreign NOL’s have an indefinite life. The Company has $18.0 million of tax credits in foreign jurisdictions at December 31, 2017. The tax credits in foreign jurisdictions begin to expire in 2026. The state NOL’s and foreign credits have a full valuation allowance. These amounts are included in the valuation allowance table on the previous page. We or our subsidiaries file income tax returns in the U.S. federal jurisdiction, and in various states and foreign jurisdictions. During the third quarter of 2017, the Internal Revenue Service commenced an examination of the federal tax return for the pre-acquisition period of January 1, 2015, through October 19, 2015, for Precision Engineered Products. The Company is no longer subject to federal examinations by tax authorities for years before 2010. The Company is also subject to examination by various state and international tax authorities. The tax years subject to examination vary by jurisdiction. The Company regularly assesses the outcomes of both ongoing and future examinations for the current or prior years to ensure the Company’s provision for income taxes is sufficient. The Company recognizes liabilities based on estimates of whether additional taxes will be due and believes its reserves are adequate in relation to any potential assessments. The outcome of any one examination, some of which may conclude during the next 12 months, is not expected to have a material impact on the Company’s financial position or results of operations. We operate under tax holidays in other countries, which are effective through December 31, 2026, and may be extended if certain additional requirements are satisfied. The tax holidays are conditional upon our meeting certain employment and investment thresholds. The impact of these tax holidays decreased foreign taxes by $0.8 million, $0.7 million, and $0.2 million for 2017, 2016, and 2015, respectively. The benefit of the tax holidays on net income per share (diluted) was $0.03, $0.03, and $0.01 for 2017, 2016, and 2015, respectively.

Debt

Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Debt	Note 12. Debt The following table presents debt balances as of December 31, 2017 and 2016. As of December 31, 2017 2016 $545.0 million Senior Secured Term Loan B (“Senior Secured Term Loan”) bearing interest at the greater of 0.75% or one-month $ 534,250 $ 543,563 $300.0 million Incremental Term Loan (“Incremental Term Loan”) bearing interest at one-month 291,000 — $143.0 million Senior Secured Revolver (“Senior Secured Revolver”) bearing interest at one-month — 27,977 $250.0 million Senior Notes (“Senior Notes”) bearing interest at 10.25% — 250,000 French Safeguard Obligations 290 358 Brazilian lines of credit and equipment notes 257 573 Chinese line of credit 2,768 2,619 Total 828,565 825,090 Less current maturities of long-term debt 17,283 12,751 Principal, net of current portion 811,282 812,339 Less unamortized debt issuance costs 20,477 26,626 Long-term debt, net of current portion $ 790,805 $ 785,713 We capitalized interest costs amounting to $1.1 million, $1.6 million, and $1.4 million in the years ended December 31, 2017, 2016, and 2015, related to construction in progress. On April 3, 2017, we redeemed the Senior Notes for $281.6 million resulting in a loss on debt extinguishment of $36.3 million, including $31.6 million cash paid for the call premium and a $4.7 million non-cash write-off On November 24, 2017, we further amended our existing credit facility to reduce the interest rate by 50 basis points on the Senior Secured Term Loan and the Incremental Term Loan. The interest rate on the Senior Secured Term Loan decreased from LIBOR plus 4.25% to LIBOR plus 3.75%. The interest rate on the Incremental Term loan decreased from LIBOR plus 3.75% to LIBOR plus 3.25%. In connection with the amendment, we paid $2.1 million in debt issuance costs which we recorded as a loss on modification of debt. Debt issuance costs related to the amendment were paid with cash on hand. Also in connection with the amendment, we wrote off $0.3 million of unamortized debt issuance costs related to the modification. We used cash generated from operations and a portion of the cash proceeds from the sale of the PBC Business to pay down the Senior Secured Revolver on August 17, 2017, which had a balance of $33.2 million outstanding at that time. We continue to utilize the Senior Secured Revolver for daily working capital needs. Our credit facility established the Senior Secured Term Loan, the Incremental Term Loan, and the Senior Secured Revolver. All other debt is subordinated in favor of obligations outstanding under the credit facility. The credit facility is collateralized by all of our assets. We pay a quarterly commitment fee at an annual rate of 0.5% on the Senior Secured Revolver for unused capacity. As of December 31, 2017, we were in compliance with all covenants under our credit facility. We have foreign credit facilities with financial institutions in France, Brazil, and China. These facilities are used to fund working capital and equipment purchases for our manufacturing plants in those countries. Our French operation has liabilities with certain creditors subject to Safeguard protection. The liabilities are being paid annually over a 10-year 10-year The following table lists aggregate maturities of long-term debt for the next five years and thereafter. Year Ending December 31, Aggregate 2018 $ 17,283 2019 17,968 2020 17,752 2021 260,750 2022 514,812 Thereafter — Total outstanding principal $ 828,565

Restructuring and Integration

Restructuring and Integration	12 Months Ended
	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Integration	Note 13. Restructuring and Integration The following tables summarize restructuring and integration charges for the years ended December 31, 2017, 2016, and 2015. Year Ended December 31, 2017 APC PEP Corporate and Total Severance and other costs $ 17 $ — $ — $ 17 Site closure and other associated costs 369 — — 369 Total $ 386 $ — $ — $ 386 Year Ended December 31, 2016 APC PEP Corporate and Total Severance and other costs $ 851 $ 836 $ — $ 1,687 Site closure and other associated costs 3,488 483 — 3,971 Total $ 4,339 $ 1,319 $ — $ 5,658 Year Ended December 31, 2015 APC PEP Corporate and Total Severance and other costs $ 672 $ 850 $ — $ 1,522 Site closure and other associated costs 1,962 — 1,765 3,727 Total $ 2,634 $ 850 $ 1,765 $ 5,249 The following tables summarize restructuring and integration reserve activity for the years ended December 31, 2017, 2016, and 2015. Reserve Charges Non-cash Cash Reserve Severance and other costs $ 1,000 $ 17 $ (164 ) $ (853 ) $ — Site closure and other associated costs 1,625 369 — (895 ) 1,099 Total $ 2,625 $ 386 $ (164 ) $ (1,748 ) $ 1,099 Reserve Charges Non-cash Cash Reserve Severance and other costs $ 887 $ 1,687 $ (278 ) $ (1,296 ) $ 1,000 Site closure and other associated costs 1,845 3,971 (2,142 ) (2,049 ) 1,625 Total $ 2,732 $ 5,658 $ (2,420 ) $ (3,345 ) $ 2,625 Reserve Charges Non-cash Cash Reserve Severance and other costs $ — $ 1,522 $ (408 ) $ (227 ) $ 887 Site closure and other associated costs — 3,727 (1,882 ) — 1,845 Total $ — $ 5,249 $ (2,290 ) $ (227 ) $ 2,732 In 2017, we recognized restructuring and integration expense of $0.4 million in our APC segment related primarily to the closure of a plant in Wheeling, Illinois, which was a part of our integration plan after the acquisition of Autocam Corporation in 2014. In 2016, we recognized restructuring and integration expense of $4.3 million in our APC segment primarily related to the closure of the Wheeling plant. These charges consisted of $0.8 million of severance costs, fixed asset impairment of $0.3 million, and site closure costs of $3.2 million. We also recognized $1.3 million related to initiatives within our PEP segment related to integration costs, rebranding, site moving costs for two plants, and associated employee costs. In 2015, we recognized $2.6 million of restructuring and integration expense in our APC segment related to the closure of the Wheeling plant. This charge consisted of severance costs of $0.7 million, one-time We are continually identifying restructuring and impairment costs at our segments. Future filings will include updates to these activities along with a reconciliation of beginning and ending liabilities. As of December 31, 2017, the entire reserve balance relates to the Wheeling plant closure. Within the next twelve months we expect to pay $1.0 million of the reserve balance, with the remaining reserve of $0.1 million expected to be paid in January 2019. We do not expect to incur any additional costs related to the closure of the Wheeling plant.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 14. Commitments and Contingencies Rental Payments We have operating lease commitments for machinery, office equipment, vehicles, manufacturing and office space which expire on varying dates. Rent expense for 2017, 2016 and 2015 was $7.6 million, $7.2 million, and $4.7 million, respectively. The following table summarizes future minimum lease payments as of December 31, 2017, under operating leases that have initial or remaining non-cancelable Year Ending December 31, Minimum 2018 $ 8,616 2019 9,576 2020 8,670 2021 7,255 2022 6,937 Thereafter 36,075 Total minimum payments $ 77,129 Brazil ICMS Tax Matter Prior to the Autocam acquisition, Autocam’s Brazilian subsidiary received notification from the Brazilian tax authorities regarding ICMS (state value added tax or VAT) tax credits claimed on intermediary materials (tooling and perishable items) used in the manufacturing process. The Brazilian tax authority notification disallowed state ICMS credits claimed on intermediary materials based on the argument that these items are not intrinsically related to the manufacturing processes. Autocam Brazil filed an administrative defense with the Brazilian tax authority arguing, among other matters, that it should qualify for an ICMS tax credit, contending that the intermediary materials are directly related to the manufacturing process. We believe that we have substantial legal and factual defenses, and we plan to defend our interests in this matter vigorously. While we believe a loss is not probable, we estimate the range of possible losses related to this assessment is from $0 to $6.0 million. No amount was accrued at December 31, 2017 or 2016, for this matter. We are entitled to indemnification from the former shareholders of Autocam, subject to the limitations and procedures set forth in the agreement and plan of merger relating to the Autocam acquisition. Management believes the indemnification would include amounts owed for the tax, interest and penalties related to this matter. All Other Legal Matters All other legal proceedings are of an ordinary and routine nature and are incidental to our operations. Management believes that such proceedings should not, individually or in the aggregate, have a material adverse effect on our business, financial condition, results of operations or cash flows. In making that determination, we analyze the facts and circumstances of each case at least quarterly in consultation with our attorneys and determine a range of reasonably possible outcomes.

Equity Offering

Equity Offering	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Equity Offering	Note 15. Equity Offering On July 1, 2015, we closed an underwritten registered public offering of common stock offered pursuant to a shelf registration statement on Form S-3

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Note 16. Share-Based Compensation We recognize compensation expense of all employee and non-employee Share-based compensation cost is recognized in the “Selling, general and administrative expense” line in the Consolidated Statements of Operations and Comprehensive Income (Loss) except for $1.0 million, $0.5 million, and $0.7 million attributable to discontinued operations for the years ended December 31, 2017, 2016 and 2015, respectively. The following table lists the components of share-based compensation cost by type of award. Year Ended December 31, 2017 2016 2015 Stock options $ 1,078 $ 687 $ 984 Restricted stock 1,968 2,061 2,623 Performance share units 2,450 1,187 432 Share-based compensation $ 5,496 $ 3,935 $ 4,039 The total tax benefit for share-based compensation cost was $1.6 million, $0.6 million, and $0.6 million for the years ended December 31, 2017, 2016, and 2015, respectively. Unrecognized compensation cost related to unvested awards was $4.6 million as of December 31, 2017. We expect that cost to be recognized over a weighted-average period of 2.0 years. Stock Options Option awards are typically granted to key employees on an annual basis. A single option grant is typically awarded to eligible employees each year by the Compensation Committee of the Board of Directors. The Compensation Committee occasionally awards additional individual grants to eligible employees. All employees are awarded options at an exercise price equal to the closing price of our stock on the date of grant. The term life of options is ten years with a vesting period of generally three years. During 2017, 2016 and 2015, we granted options to purchase 125,700, 167,000, and 54,100 shares, respectively, to certain key employees. The weighted average grant date fair value of the options granted during 2017, 2016 and 2015 was $11.84, $5.02, and $12.61 per share, respectively. The fair value of our options cannot be determined by market value because they are not traded in an open market. Accordingly, we utilized the Black Scholes financial pricing model to estimate the fair value. The following table shows the weighted average assumptions relevant to determining the fair value of stock options granted in each year. 2017 2016 2015 Expected term 6 years 6 years 6 years Risk free interest rate 2.03 % 1.43 % 1.43 % Dividend yield 1.16 % 2.48 % 1.11 % Expected volatility 56.56 % 59.23 % 59.22 % Expected forfeiture rate 3.00 % 3.00 % 3.00 % The expected term is derived from using the simplified method of determining stock option terms as described under the Securities and Exchange Commission’s Staff Accounting Bulletin Topic 14, Share-based payment The average risk-free interest rate is derived from United States Department of Treasury published interest rates of daily yield curves for the same time period as the expected term. The expected dividend yield is derived by a mathematical formula which uses the expected annual dividends over the expected term divided by the fair market value of our common stock at the grant date. The expected volatility rate is derived from our actual common stock historical volatility over the same time period as the expected term. The volatility rate is derived by mathematical formula utilizing daily closing price data. The forfeiture rate is determined from examining the historical pre-vesting The following table summarizes option activity for the year ended December 31, 2017. Options Shares Weighted- Weighted- Aggregate Outstanding at January 1, 2017 897 $ 12.22 Granted 126 24.20 Exercised (263 ) 11.84 $ 3,784 Forfeited or expired (14 ) 14.34 Outstanding at December 31, 2017 746 $ 14.33 6.2 $ 9,900 (1) Exercisable at December 31, 2017 573 $ 12.75 5.5 $ 8,506 (1) (1) The intrinsic value is the amount by which the closing market price of our stock as of December 31, 2017, was greater than the exercise price of any individual option grant. Cash proceeds from the exercise of options in the years ended December 31, 2017, 2016, and 2015 totaled approximately $3.1 million, $2.6 million, and $2.0 million, respectively. The tax benefit recognized from stock option exercises was $0.2 million, less than $0.1 million, and $0.1 million in the years ended December 31, 2017, 2016, and 2015, respectively. For the years ended December 31, 2017, 2016 and 2015, proceeds from stock options are presented exclusive of tax benefits in cash flows from financing activities in the Consolidated Statements of Cash Flows. The total intrinsic value of options exercised during the years ended December 31, 2017, 2016 and 2015 was $3.8 million, $2.9 million, and $2.6 million, respectively. Restricted Stock During 2017, 2016, and 2015 we granted 85,393, 152,510, and 114,475 restricted stock awards to non-executive pro-rata non-executive Nonvested Weighted Nonvested at January 1, 2017 202 $ 15.01 Granted 85 $ 24.29 Vested (135 ) $ 15.63 Forfeited — $ — Nonvested at December 31, 2017 152 $ 19.21 Total grant-date fair value of restricted stock that vested in the years ended December 31, 2017, 2016, and 2015, was $2.1 million, $2.6 million, and $ 1.2 million, respectively. Performance Share Units Performance Share Units (“PSUs”) are a form of long-term incentive compensation awarded to executive officers and certain other key employees designed to directly align the interests of employees to the interests of our stockholders, and to create long-term stockholder value. PSU awards granted in 2017 were made pursuant to the NN, Inc. 2016 Omnibus Incentive Plan and a Performance Share Unit Agreement. PSU awards granted in 2015 and 2016 were made pursuant to the NN, Inc. 2011 Stock Incentive Plan and a Performance Share Unit Agreement. Some PSUs are based on total shareholder return (“TSR Awards”), and other PSUs are based on return on invested capital (“ROIC Awards”). The TSR Awards vest, if at all, upon our achieving a specified relative total shareholder return, which will be measured against the total shareholder return of the S&P SmallCap 600 Index during specified performance periods as defined in the award agreements. Each performance period generally begins on January 1 of the year of grant and ends 36 months later on December 31. The ROIC Awards will vest, if at all, upon our achieving a specified average return on invested capital during the performance periods. We recognize compensation expense over the performance period in which the performance and market conditions are measured. If the PSUs do not vest at the end of the performance periods, then the PSUs will expire automatically. Upon vesting, the PSUs will be settled by the issuance of shares of our common stock, subject to the executive officer’s continued employment. The actual number of shares of common stock will be issued to each award recipient at the end of the performance periods will be interpolated between a threshold and maximum payout amount based on actual performance results. No dividends will be paid on outstanding PSUs during the performance period; however, dividend equivalents will be paid based on the number of shares of common stock that are ultimately earned at the end of the Performance Periods. With respect to the TSR Awards, a participant will earn 50% of the target number of PSUs for “Threshold Performance,” 100% of the target number of PSUs for “Target Performance,” and 150% of the target number of PSUs for “Maximum Performance.” With respect to the ROIC Awards, a participant will earn 35% of the target number of PSUs for “Threshold Performance,” 100% of the target number of PSUs for “Target Performance,” and 150% of the target number of PSUs for “Maximum Performance. For performance levels falling between the values shown below, the percentages will be determined by interpolation. The following table presents the goals with respect to TSR and ROIC for each award. TSR: Threshold Performance (50% of Shares) Target Performance (100% of Shares) Maximum Performance (150% of Shares) 2017 grants 35th Percentile 50th Percentile 75th Percentile 2016 grants 35th Percentile 50th Percentile 75th Percentile 2015 grants 35th Percentile 50th Percentile 75th Percentile ROIC: Threshold Performance (35% of Shares) Target Performance (100% of Shares) Maximum Performance (150% of Shares) 2017 grants 15 % 17.5 % 20 % 2016 grants 15.5 % 18 % 20.5 % 2015 grants 11 % 12.5 % 14 % We estimate the grant date fair value of TSR Awards using the Monte Carlo simulation model, as the total shareholder return metric is considered a market condition under ASC Topic 718, Compensation – stock compensation TSR Awards ROIC Awards Award Year Shares Grant Date Shares (in Grant Date 2017 46 $ 29.84 53 $ 24.20 2016 101 $ 9.38 101 $ 11.31 2015 36 $ 28.61 36 $ 25.16 We generally recognize expense for ROIC Awards based on the Target Performance threshold of 100% because, at the date of grant, the Target Performance is the probable level of performance achievement. In 2017, we determined that it was probable that the ROIC Awards granted in 2015 would vest at the Maximum Performance level of 150% rather than 100%. Accordingly, we recorded a cumulative catch-up paid-in The following table summarizes the status of unvested PSU awards as of December 31, 2017, and changes during the year then ended. Nonvested TSR Awards Nonvested ROIC Awards Shares Weighted Grant-Date Shares Weighted Grant-Date Nonvested at January 1, 2017 124 $ 14.33 124 $ 14.87 Change in Vesting Estimate (1) — $ — 16 $ 25.16 Granted 46 $ 29.84 53 $ 24.20 Vested (32 ) $ 28.61 (48 ) $ 25.16 Forfeited (8 ) $ 19.19 (9 ) $ 18.03 Nonvested at December 31, 2017 130 $ 16.60 136 $ 16.27 (1) Represents additional shares expected to be issued in settlement of ROIC Awards that were granted in 2015. Acceleration of Vesting Prior to the sale of the PBC Business, our board of directors approved the acceleration of vesting of share-based awards to 19 members of PBC management in recognition of their service to the Company. The vesting date was accelerated to August 17, 2017, and the term was changed to two years for 58,094 option awards. The vesting date for 25,564 restricted stock awards was accelerated to August 17, 2017. We accounted for the acceleration of vesting as a modification of share-based awards. Accordingly, we recognized in discontinued operations approximately $0.8 million of incremental share-based compensation expense.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Accumulated Other Comprehensive Income	Note 17. Accumulated Other Comprehensive Income The majority of our AOCI relates to foreign currency translation of our foreign subsidiary balances. During the year ended December 31, 2017, we had other comprehensive income of 22.1 million due to foreign currency translations. In connection with the sale of the PBC Business, we reclassified $9.2 million out of AOCI to discontinued operations on the Consolidated Statement of Operations in 2017. During the year ended December 31, 2016, we had other comprehensive loss of $10.6 million due to foreign currency translations and a net $1.9 million gain due to change in fair value of the interest rate swap and discontinuation of hedge accounting. Amounts related to the interest rate swap were reclassified out of AOCI during 2016 upon discontinuation of hedge accounting. During the year ended December 31, 2015, we had other comprehensive loss of $24.9 million due to foreign currency translations and a $1.6 million other comprehensive loss due to change in fair value of the interest rate swap.

Net Income (Loss) Per Share

Net Income (Loss) Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	Note 18. Net Income (Loss) Per Share The following summarizes the computation of basic and diluted net income (loss) per share. Year Ended December 31, 2017 2016 2015 Income (loss) from continuing operations $ 25,364 $ (9,490 ) $ (24,375 ) Income from discontinued operations, net of tax 137,688 16,153 17,889 Net income (loss) $ 163,052 $ 6,663 $ (6,486 ) Weighted average shares outstanding 27,433 27,016 21,181 Effect of dilutive stock options 322 — — Diluted shares outstanding 27,755 27,016 21,181 Basic income (loss) from continuing operations per share $ 0.92 $ (0.35 ) $ (1.15 ) Basic income from discontinued operations per share 5.02 0.60 0.84 Basic net income (loss) per share $ 5.94 $ 0.25 $ (0.31 ) Diluted income (loss) from continuing operations per share $ 0.91 $ (0.35 ) $ (1.15 ) Diluted income from discontinued operations per share 4.96 0.60 0.84 Diluted net income (loss) per share $ 5.87 $ 0.25 $ (0.31 ) The calculations of diluted income (loss) from continuing operations per share for the years ended December 31, 2017, 2016, and 2015, exclude 0.4 million, 0.8 million, and 1.0 million stock options which had the effect of being anti-dilutive. Given the net loss from continuing operations in 2016 and 2015, all options are considered anti-dilutive in those years. Stock options excluded from the calculations of diluted income (loss) from continuing operations per share for the years ended December 31, 2017, 2016, and 2015, had a per share exercise price ranging from $4.42 to $25.16 in each respective year.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 19. Fair Value Measurements Fair value is an exit price representing the expected amount that an entity would receive to sell an asset or pay to transfer a liability in an orderly transaction with market participants at the measurement date. We followed consistent methods and assumptions to estimate fair values as more fully described in Note 1. Our financial instruments that are subject to fair value disclosure consist of cash and cash equivalents, accounts receivable, accounts payable, derivatives, short-term investments and long-term debt. As of December 31, 2017, the carrying values of these financial instruments approximated fair value. The fair value of floating-rate debt approximates the carrying amount because the interest rates paid are based on short-term maturities. As of December 31, 2017, we had no fixed-rate debt outstanding. Nonrecurring Fair Value Measurements We completed the Vandalia acquisition on October 2, 2017. In connection with our accounting for this acquisition, it was necessary for us to estimate the values of the assets acquired and liabilities assumed, which involved the use of various assumptions discussed in Note 3. The following table summarizes the fair value estimates for financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis by category as of the acquisition date: Fair Value Measurements During 2017, Using Description Fair Value Quoted Prices in Significant Other Significant Vandalia current assets $ 10,166 $ — $ — $ 10,166 Vandalia property, plant and equipment 13,981 — — 13,981 Vandalia intangible assets subject to amortization 6,900 — — 6,900 Vandalia other non-current 29 — — 29 Vandalia goodwill 9,452 — — 9,452 Vandalia non-current (1,794 ) — — (1,794 ) $ 38,734 $ — $ — $ 38,734 Recurring Fair Value Measurements Fair value principles prioritize valuation inputs across three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the assumptions used to measure assets and liabilities at fair value. An asset or liability’s classification within the various levels is determined based on the lowest level input that is significant to the fair value measurement. Our policy is to manage interest expense using a mix of fixed and variable rate debt. To manage this mix effectively, we may enter into interest rate swaps in which we agree to exchange the difference between fixed and variable interest amounts calculated by reference to an agreed upon notional principal amount. At December 31, 2016, we had a $150 million interest rate swap that fixed the interest rate on a portion of our variable rate debt at 6.466%. The objective of the interest rate swap was to eliminate the variability of cash flows in interest payments on the first $150 million of variable interest debt. At the inception of the interest rate swap, the variable rate benchmark was three-month LIBOR for both the variable rate debt and the interest rate swap. The changes in cash flows of the interest rate swap were expected to exactly offset the changes in cash flows of the variable rate debt. The hedged risk was the interest rate risk exposure to changes in the interest payments, attributable to changes in the benchmark three-month LIBOR interest rates (subject to a 1.0% LIBOR index floor) through December 31, 2018. During 2016, the LIBOR floor index on our Senior Secured Term Loan was lowered to 0.75%, and our intent regarding future interest rate resets changed. Three-month LIBOR was above the floor, and it was more economical to use one-month mark-to-market The following table summarizes assets and liabilities measured at fair value on a recurring basis for the interest rate swap derivative financial instrument as of December 31, 2016. Fair Value Measurements as of December 31, 2016 Description December 31, Quoted Prices in Significant Other Significant Derivative asset—current $ 69 $ — $ 69 $ — Derivative asset—noncurrent 6 — 6 — Derivative liability—current (1,903 ) — (1,903 ) — Derivative liability—noncurrent (1,028 ) — (1,028 ) — $ (2,856 ) $ — $ (2,856 ) $ — The inputs for determining fair value of the interest rate swap are classified as Level 2 inputs. Level 2 fair value is based on estimates using standard pricing models. These standard pricing models use inputs which are derived from or corroborated by observable market data such as interest rate yield curves, index forward curves, discount curves, and volatility surfaces. Counterparties to these derivative contracts are highly rated financial institutions which management believes carry only a minimal risk of nonperformance. We have elected to present the derivative contracts on a gross basis in the Consolidated Balance Sheets included within other current assets, other non-current non-current As of December 31, 2017, we had no gains or losses in AOCI related to the interest rate swap. In connection with lowering the LIBOR index floor from 1.0% to 0.75% within the $150 million interest rate swap, we received a $0.3 million payment in 2016 that reduced the net liability position on the $150 million interest rate swap. The payment was reported in the “Derivative payments on interest rate swap” line in the Consolidated Statement of Operations and Comprehensive Income (Loss) for the year ended December 31, 2016. Additionally, during the portion of 2016 when the interest rate swap was accounted for in accordance with hedge accounting, the periodic settlements and related reclassification of other comprehensive income were recognized as $1.4 million of net hedging losses on the interest rate swap in the “Interest expense” line on the Consolidated Statements of Operations and Comprehensive Income (Loss). The “Derivative loss (gain) on change in interest rate swap fair value” line on the Consolidated Statements of Operations and Comprehensive Income (Loss) includes interest rate swap settlements of $1.4 million in both 2017 and 2016. Derivatives’ Hedging Relationships As of December 31, 2017 and 2016, we did not own derivative instruments that were classified as fair value hedges or trading securities. In addition, as of December 31, 2017 and 2016, we did not own derivative instruments containing credit risk contingencies.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Note 20. Quarterly Results of Operations (Unaudited) The effect of the revision discussed within Note 1 to the 2017 and 2016 previously issued unaudited quarterly financial results is as follows (in thousands, except per share data). The 2017 quarterly revisions will be affected in connection with the future 2018 unaudited interim condensed consolidated financial statement filings on Form 10-Q. The following summarizes the unaudited quarterly results of operations for the fourth quarter ended December 31, 2017. Fourth Quarter 2017 Net sales $ 156,135 Cost of sales (exclusive of depreciation and amortization) 118,814 Income (loss) from continuing operations 53,325 Income from discontinued operations, net of tax (2,507 ) Net income (loss) 50,818 Comprehensive income (loss) 51,885 Basic income (loss) from continuing operations per share $ 1.93 Basic net income (loss) per share $ 1.84 Diluted income (loss) from continuing operations per share $ 1.91 Diluted net income (loss) per share $ 1.82 The effect of recasting the prior periods for the PBC discontinued operations as described in Note 2 is also reflected below. As Reported Adjustment Discontinued As Revised Third Quarter 2017 Net sales $ 148,156 $ — $ 148,156 Cost of sales (exclusive of depreciation and amortization) 110,836 436 111,272 Income (loss) from continuing operations (2,930 ) (550 ) (3,480 ) Income from discontinued operations, net of tax 135,825 (6,384 ) 129,441 Net income (loss) 132,895 (6,934 ) 125,961 Comprehensive income (loss) 129,735 (6,606 ) 123,129 Basic income (loss) from continuing operations per share $ (0.11 ) $ (0.02 ) $ (0.13 ) Basic net income (loss) per share $ 4.82 $ (0.25 ) $ 4.57 Diluted income (loss) from continuing operations per share $ (0.11 ) $ (0.02 ) $ (0.13 ) Diluted net income (loss) per share $ 4.82 $ (0.25 ) $ 4.57 Second Quarter 2017 Net sales $ 225,875 $ — $ (67,928 ) $ 157,947 Cost of sales (exclusive of depreciation and amortization) 166,040 — (51,526 ) 114,514 Income (loss) from continuing operations (21,529 ) 391 (5,236 ) (26,374 ) Income from discontinued operations, net of tax — — 5,236 5,236 Net income (loss) (21,529 ) 391 (21,138 ) Comprehensive income (loss) (12,289 ) 662 (11,627 ) Basic income (loss) from continuing operations per share $ (0.78 ) $ 0.01 $ (0.19 ) $ (0.96 ) Basic net income (loss) per share $ (0.78 ) $ 0.01 $ (0.77 ) Diluted income (loss) from continuing operations per share $ (0.78 ) $ 0.01 $ (0.19 ) $ (0.96 ) Diluted net income (loss) per share $ (0.78 ) $ 0.01 $ (0.77 ) First Quarter 2017 Net sales $ 226,314 $ — $ (68,759 ) $ 157,555 Cost of sales (exclusive of depreciation and amortization) 166,954 485 (52,959 ) 114,480 Income (loss) from continuing operations 7,407 4 (5,518 ) 1,893 Income from discontinued operations, net of tax — — 5,518 5,518 Net income (loss) 7,407 4 7,411 Comprehensive income (loss) 12,113 403 12,516 Basic income (loss) from continuing operations per share $ 0.27 $ 0.00 $ (0.20 ) $ 0.07 Basic net income (loss) per share $ 0.27 $ 0.00 $ 0.27 Diluted income (loss) from continuing operations per share $ 0.27 $ 0.00 $ (0.20 ) $ 0.07 Diluted net income (loss) per share $ 0.27 $ 0.00 $ 0.27 As Originally Reported Adjustment Discontinued As Revised Fourth Quarter 2016 Net sales $ 202,029 $ — $ (60,385 ) $ 141,644 Cost of sales (exclusive of depreciation and amortization) 151,936 466 (47,597 ) 104,805 Income (loss) from continuing operations 3,063 (1,512 ) (3,737 ) (2,186 ) Income from discontinued operations, net of tax — — 3,737 3,737 Net income (loss) 3,063 (1,512 ) 1,551 Comprehensive income (loss) (10,212 ) (90 ) (10,302 ) Basic income (loss) from continuing operations per share $ 0.11 $ (0.06 ) $ (0.14 ) $ (0.08 ) Basic net income (loss) per share $ 0.11 $ (0.06 ) $ 0.06 Diluted income (loss) from continuing operations per share $ 0.11 $ (0.06 ) $ (0.14 ) $ (0.08 ) Diluted net income (loss) per share $ 0.11 $ (0.06 ) $ 0.06 Third Quarter 2016 Net sales $ 204,961 $ — $ (58,247 ) $ 146,714 Cost of sales (exclusive of depreciation and amortization) 152,538 91 (45,353 ) 107,276 Income (loss) from continuing operations 4,147 419 (3,622 ) 944 Income from discontinued operations, net of tax — — 3,622 3,622 Net income (loss) 4,147 419 4,566 Comprehensive income (loss) 8,740 (2,938 ) 5,802 Basic income (loss) from continuing operations per share $ 0.15 $ 0.02 $ (0.13 ) $ 0.03 Basic net income (loss) per share $ 0.15 $ 0.02 $ 0.17 Diluted income (loss) from continuing operations per share $ 0.15 $ 0.02 $ (0.13 ) $ 0.03 Diluted net income (loss) per share $ 0.15 $ 0.02 $ 0.17 Second Quarter 2016 Net sales $ 214,272 $ — $ (65,157 ) $ 149,115 Cost of sales (exclusive of depreciation and amortization) 156,794 114 (49,580 ) 107,328 Income (loss) from continuing operations 2,031 (172 ) (4,326 ) (2,467 ) Income from discontinued operations, net of tax — — 4,326 4,326 Net income (loss) 2,031 (172 ) 1,859 Comprehensive income (loss) (973 ) (1,879 ) (2,852 ) Basic income (loss) from continuing operations per share $ 0.08 $ (0.01 ) $ (0.16 ) $ (0.09 ) Basic net income (loss) per share $ 0.08 $ (0.01 ) $ 0.07 Diluted income (loss) from continuing operations per share $ 0.07 $ (0.01 ) $ (0.16 ) $ (0.09 ) Diluted net income (loss) per share $ 0.07 $ (0.01 ) $ 0.07 First Quarter 2016 Net sales $ 212,226 $ — $ (64,745 ) $ 147,481 Cost of sales (exclusive of depreciation and amortization) 159,754 144 (50,464 ) 109,434 Income (loss) from continuing operations (1,299 ) (14 ) (4,468 ) (5,781 ) Income from discontinued operations, net of tax — — 4,468 4,468 Net income (loss) (1,299 ) (14 ) (1,313 ) Comprehensive income (loss) 4,418 884 5,302 Basic income (loss) from continuing operations per share $ (0.05 ) $ (0.00 ) $ (0.17 ) $ (0.22 ) Basic net income (loss) per share $ (0.05 ) $ (0.00 ) $ (0.05 ) Diluted income (loss) from continuing operations per share $ (0.05 ) $ (0.00 ) $ (0.17 ) $ (0.22 ) Diluted net income (loss) per share $ (0.05 ) $ (0.00 ) $ (0.05 ) The fourth quarter of 2017 was impacted by acquisition related costs of $0.2 million pre-tax, after-tax after-tax The second quarter of 2017 includes $39.6 million loss on extinguishment of debt and write-offs of unamortized debt issuance costs incurred in connection with the April 3, 2017, redemption of Senior Notes and amendment of our credit facility as disclosed in Note 12. The fourth quarter of 2017 includes an additional $2.4 million of loss on extinguishment of debt and write-offs of unamortized debt issuance costs incurred in connection with the November 24, 2017, amendment of the credit facility to reduce interest rates as disclosed in Note 12.

Prior Periods' Financial Statem

Prior Periods' Financial Statement Revision	12 Months Ended
	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Prior Periods' Financial Statement Revision	Note 21. Prior Periods’ Financial Statement Revision The following tables present the effect of the correction of the misstatements and the revision on the Consolidated Statements of Operations and Comprehensive Income (Loss), as further described in Note 1. Also, as further described in Note 2, due to the disposition of PBC and the related discontinued operations treatment, the tables below present separately the impact of the correction of the misstatements as well as the effect of recasting the prior periods for the PBC discontinued operations. Year Ended December 31, 2016 As Originally Adjustment Discontinued As Revised Cost of sales (exclusive of depreciation and amortization) $ 621,022 $ 815 $ (192,994 ) $ 428,843 Selling, general and administrative expense 80,266 870 (16,992 ) 64,144 Depreciation and amortization 62,488 85 (11,852 ) 50,721 Other operating expense (income) 288 548 (27 ) 809 Income from operations 59,400 (2,318 ) (22,303 ) 34,779 Loss on extinguishment of debt and write-off of unamortized debt issuance costs 3,089 (500 ) — 2,589 Other (income) expense, net (2,591 ) (783 ) 503 (2,871 ) Income (loss) from continuing operations before (7,309 ) (1,035 ) (22,522 ) (30,866 ) Provision (benefit) for income taxes (9,313 ) 244 (6,369 ) (15,438 ) Income (loss) from continuing operations 7,942 (1,279 ) (16,153 ) (9,490 ) Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Other comprehensive income (loss): Change in fair value of interest rate swap 3,015 (1,105 ) 1,910 Foreign currency translation loss (8,984 ) (1,639 ) (10,623 ) Other comprehensive loss (5,969 ) (2,744 ) (8,713 ) Comprehensive income (loss) $ 1,973 $ (4,023 ) $ (2,050 ) Basic net income (loss) per share $ 0.29 $ (0.05 ) $ 0.25 Diluted net income (loss) per share $ 0.29 $ (0.05 ) $ 0.25 Year Ended December 31, 2015 As Originally Adjustment Discontinued As Revised Selling, general and administrative expense $ 51,745 $ 596 $ (17,468 ) $ 34,873 Depreciation and amortization 44,482 (13 ) (11,496 ) 32,973 Other operating expense (income) (687 ) 663 — (24 ) Income (loss) from operations 26,797 (1,246 ) (25,493 ) 58 Loss on extinguishment of debt and write-off of unamortized debt issuance costs 18,673 500 — 19,173 Income (loss) from continuing operations before (22,950 ) (1,746 ) (24,522 ) (49,218 ) Provision (benefit) for income taxes (10,518 ) (2,691 ) (6,633 ) (19,842 ) Income (loss) from continuing operations (7,431 ) 945 (17,889 ) (24,375 ) Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Other comprehensive income (loss): Change in fair value of interest rate swap (2,584 ) 947 (1,637 ) Foreign currency translation loss (21,936 ) (2,967 ) (24,903 ) Other comprehensive loss (24,520 ) (2,020 ) (26,540 ) Comprehensive income (loss) $ (31,951 ) $ (1,075 ) $ (33,026 ) Basic net income (loss) per share $ (0.35 ) $ 0.04 $ (0.31 ) Diluted net income (loss) per share $ (0.35 ) $ 0.04 $ (0.31 ) The following table presents the effect of the correction of the misstatements on the Consolidated Balance Sheet as well as the effect of recasting the prior periods for the PBC discontinued operations. As of December 31, 2016 As Originally Adjustment Discontinued As Revised Income tax receivable $ — $ 1,041 $ 700 $ 1,741 Other current assets 11,752 32 (4,755 ) 7,029 Total current assets 280,555 1,073 700 282,328 Property, plant and equipment, net 322,953 (487 ) (92,373 ) 230,093 Goodwill 450,311 2,127 (8,909 ) 443,529 Investment in joint venture 40,694 (4,686 ) — 36,008 Other non-current 9,892 (839 ) (940 ) 8,113 Total assets 1,360,386 (2,812 ) 700 1,358,274 Accounts payable 75,719 (15 ) (31,014 ) 44,690 Accrued salaries, wages and benefits 24,996 1,464 (9,234 ) 17,226 Income tax payable 2,125 — (2,125 ) — Other current liabilities 23,025 (524 ) (2,176 ) 20,325 Total current liabilities 138,616 925 700 140,241 Deferred tax liabilities 99,591 600 (4,173 ) 96,018 Other non-current 21,267 1,471 (8,438 ) 14,300 Total liabilities 1,045,187 2,996 700 1,048,883 Retained earnings 55,509 (334 ) 55,175 Accumulated other comprehensive loss (25,122 ) (5,474 ) (30,596 ) Total stockholders’ equity 315,199 (5,808 ) 309,391 Total liabilities and stockholders’ equity 1,360,386 (2,812 ) 700 1,358,274 The following tables present the effect of the correction of the misstatements on our Consolidated Statements of Changes in Stockholders’ Equity. As of and for the Year Ended December 31, 2016 As Previously Adjustment As Revised Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Retained earnings 55,509 (334 ) 55,175 Change in fair value of interest rate swap 3,015 (1,105 ) 1,910 Share-based compensation expense 4,270 (335 ) 3,935 Foreign currency translation loss (8,984 ) (1,639 ) (10,623 ) Accumulated other comprehensive loss (25,122 ) (5,474 ) (30,596 ) Total stockholders’ equity 315,199 (5,808 ) 309,391 As of and for the Year Ended December 31, 2015 As Previously Adjustment As Revised Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Retained earnings 55,151 945 56,096 Change in fair value of interest rate swap (2,584 ) 947 (1,637 ) Share-based compensation expense 3,704 335 4,039 Foreign currency translation loss (21,936 ) (2,967 ) (24,903 ) Accumulated other comprehensive loss (19,153 ) (2,730 ) (21,883 ) Additional paid-in 277,582 335 277,917 Total stockholders’ equity 313,881 (1,450 ) 312,431 The following tables present the effect of the correction of the misstatements on our Consolidated Statements of Cash Flows. Year Ended December 31, 2016 As Adjustment Reclasses (1) As Revised Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Adjustments to reconcile net income to net cash provided by (used by) operating activities: Depreciation and amortization 62,488 85 62,573 Write-off of debt issuance costs 3,089 (500 ) 2,589 Compensation expense from issuance of share-based awards 4,270 (335 ) 3,935 Deferred income taxes (10,430 ) (5,096 ) (15,526 ) Other — (122 ) (122 ) Changes in operating assets and liabilities: Other current assets (269 ) (253 ) (522 ) Other non-current assets 1,833 548 2,381 Income taxes payable (receivable) — (501 ) 284 (217 ) Other liabilities 1,946 6,828 390 9,164 Net cash provided by (used by) operating activities 69,303 (625 ) 674 69,352 Cash flows from investing activities Proceeds from insurance claim — 122 122 Net cash provided by (used by) investing activities (41,346 ) 122 — (41,224 ) Cash flows from financing activities Proceeds from long-term debt (2) — 44,000 44,000 Repayment of long-term debt (2) (30,000 ) (25,000 ) (55,000 ) Proceeds from (repayment of) short-term debt, net 18,544 (19,000 ) (456 ) Proceeds from shares issued 2,832 (2,832 ) — Proceeds from issuance of stock and exercise of stock options — 2,832 2,832 Shares withheld to satisfy income tax withholding — (173 ) (173 ) Net cash provided by (used by) financing activities (24,308 ) — (173 ) (24,481 ) Effect of exchange rate changes on cash flows (4,331 ) — 2 (4,329 ) Net change in cash and cash equivalents (682 ) (503 ) 503 (682 ) Cash and cash equivalents at beginning of period 15,087 15,087 Cash and cash equivalents at end of period 14,405 (503 ) 503 14,405 Year Ended December 31, 2015 As Adjustment Reclasses (1) As Revised Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Adjustments to reconcile net income to net cash provided by (used by) operating activities: Depreciation and amortization 44,482 (13 ) 44,469 Write-off of debt issuance costs 18,673 500 19,173 Compensation expense from issuance of share-based awards 3,704 335 4,039 Deferred income taxes (16,878 ) (2,265 ) (19,143 ) Changes in operating assets and liabilities: Accounts receivable (1,343 ) (1,149 ) (2,492 ) Other current assets (944 ) 865 (79 ) Other non-current assets (1,501 ) 942 (559 ) Income taxes payable (receivable) — (540 ) 3,171 2,631 Other liabilities 4,999 (307 ) (1,251 ) 3,441 Accounts payable (6,748 ) (1,215 ) (7,963 ) Net cash provided by (used by) operating activities 33,310 (753 ) 771 33,328 Net cash provided by (used by) investing activities (665,838 ) — — (665,838 ) Cash flows from financing activities Shares withheld to satisfy income tax withholding — (231 ) (231 ) Net cash provided by (used by) financing activities 611,851 — (231 ) 611,620 Effect of exchange rate changes on cash flows (1,553 ) 215 (2 ) (1,340 ) Net change in cash and cash equivalents (22,230 ) (538 ) 538 (22,230 ) Cash and cash equivalents at beginning of period 37,317 37,317 Cash and cash equivalents at end of period 15,087 (538 ) 538 15,087 (1) Includes the reclassification of prior period amounts to reflect current period presentation for the adoption of ASU 2016-09 (see Note 1), as well as for the addition of the income taxes payable (receivable) line item. (2) The 2016 presentation of proceeds from and repayments of long-term debt were shown net. The adjustments made are to present these amounts gross for each activity (proceeds from and repayments of) during 2016.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Note 22. Subsequent Events New Business Structure On January 2, 2018, we announced plans to implement a new enterprise and management structure designed to accelerate growth and further balance our portfolio by aligning our strategic assets and businesses. Under the new structure, our businesses will be organized into three segments based principally on the end markets they serve. Our segments will be known as Mobile Solutions, Power Solutions, and Life Sciences. Mobile Solutions will be focused on growth in the industrial and automotive end markets. Power Solutions will be focused on growth in the electrical and aerospace and defense end markets. Life Sciences will be focused on growth in the medical end market. As a result of the changes in our organizational structure, we expect to reallocate goodwill in relation to our operating segments. We are in the process of determining the impact of the new structure on our financial statements. Beginning in the first quarter of 2018, our segment disclosures will reflect our new organizational structure. Bridgemedica Acquisition On February 22, 2018, we completed the acquisition of 100% of the assets of Bridgemedica, LLC (“Bridgemedica”) for $15.0 million cash. Bridgemedica is a medical device company that provides concept to supply solutions through design, development engineering and manufacturing. Operating results of Bridgemedica will be reported prospectively in our Life Sciences segment. The effects of this acquisition are not reflected in the consolidated financial statements presented in this Annual Report because the acquisition occurred subsequent to December 31, 2017. We are in the process of analyzing the opening balance sheet and purchase price allocation.

Significant Accounting Polici30

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Nature of Business	Nature of Business NN, Inc. is a global diversified industrial company that combines advanced engineering and production capabilities with in-depth Form 10-K, the
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”). Certain prior period amounts have been reclassified to conform to the current year’s presentation. Historical periods presented reflect discontinued operations (see Note 2). Historical periods also reflect revisions related to prior period misstatements (see Prior Periods’ Financial Statement Revision) identified in the current year (see Note 21). In management’s opinion, the accompanying consolidated financial statements reflect all adjustments necessary to fairly present our results of operations, financial position, and cash flows for the periods presented. Except for per share data or as otherwise indicated, all dollar amounts presented in the tables in these Notes to Consolidated Financial Statements are in thousands of U.S. dollars.
Principles of Consolidation	Principles of Consolidation Our consolidated financial statements include the accounts of NN, Inc. and its wholly owned subsidiaries. We own a 49% interest in a joint venture which we account for using the equity method (see Note 10). All intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of certain assets and liabilities, disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates.
Prior Periods' Financial Statement Revision	Prior Periods’ Financial Statement Revision In connection with the preparation of our consolidated financial statements for the year ended December 31, 2017, and the preparation of our interim financial statements, we identified various misstatements in our previously issued 2016 and 2015 annual financial statements and interim periods in 2016 and 2017. These prior period errors relate primarily to the (i) accounting for income and franchise taxes, (ii) accounting for the gain on the disposition of PBC Business, (iii) accounting for indemnification assets related to a prior acquisition, (iv) accounting for foreign currency transactions, (v) accounting for the translation of foreign subsidiary assets and joint venture, and (vi) other immaterial errors, including errors that had previously been adjusted for as out of period corrections in the period identified. We have assessed the materiality of the misstatements on the 2016 and 2015 financial statements in accordance with SEC Staff Accounting Bulletin (“SAB”) Topic 1.M, Materiality Accounting Changes and Error Corrections Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements The accompanying notes to the consolidated financial statements reflect the impact of this revision. We have also reflected the impact of the revision in the applicable unaudited quarterly financial results. Refer to Note 20 and 21 for reconciliations between as originally reported and as revised annual and quarterly amounts, respectively.
Accounting Standards Recently Adopted	Accounting Standards Recently Adopted Stock Compensation. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. paid-in 2016-09. Inventory. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory, 2015-11 2015-11 Tax Reform Estimates. one-time one-year
Accounting Standards Not Yet Adopted	Accounting Standards Not Yet Adopted Revenue Recognition. The standard is effective for us beginning January 1, 2018, with full retrospective or modified retrospective adoption permitted. We will adopt the standard utilizing the modified retrospective transition method. Under this transition method, we will recognize the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2018, and will apply the new standard beginning with the most current period presented to contracts that are not completed at the date of initial application. We expect the adoption adjustment to be less than $0.1 million, which represents the net profit on certain contracts that were accounted for on a consignment basis prior to the new guidance but do not meet the consignment criteria under the new standard. We expect to utilize certain practical expedients allowed by the new standard. We intend to utilize the portfolio approach practical expedient to evaluate sales-related discounts on a portfolio basis to contracts with similar characteristics. We expect that the effect on our financial statements of applying the portfolio approach would not differ materially from applying the new standard to individual contracts. Leases. 2016-02, Leases 2016-02 Leases, Leases. 2016-02 right-of-use off-balance Statement of Cash Flows. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) The new cash flow guidance states that cash payments for debt prepayment costs should be classified as cash outflows for financing activities. We paid $31.6 million for debt prepayment costs in 2017 as discussed in Note 12. These debt prepayment costs are classified as cash outflows from operating activities in 2017. Under the new guidance, these costs will be reclassified to cash outflows from financing activities. The new guidance also requires entities to make an accounting policy election regarding classification of distributions received from equity method investees. Existing guidance does not currently address how an entity should determine which distributions represent returns on versus returns of investment. The lack of specific guidance has resulted in diversity in practice. The two allowable approaches are the “cumulative earnings” approach and the “nature of the distribution” approach, as defined by ASU 2016-15. Goodwill. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, Effects of Tax Reform in Other Comprehensive Income. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, 2018-02 Definition of a Business. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business,
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash and highly liquid investments with original maturities of three months or less.
Fair Value Measurements	Fair Value Measurements Fair value principles prioritize valuation inputs across three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the assumptions used to measure assets and liabilities at fair value. An asset or liability’s classification within the various levels is determined based on the lowest level input that is significant to the fair value measurement.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts Trade accounts receivable are recorded at the invoiced amount upon recognition of a sale of goods when ownership and risk of loss is assumed by the customer. We maintain allowances for doubtful accounts for estimated losses resulting from the inability of our customers to make required payments. The allowances are based on the number of days an individual receivable is past the invoice due date and on regular credit evaluations of our customers. In evaluating the credit worthiness of our customers, we consider numerous inputs including but not limited to the customers’ financial position, past payment history, relevant industry trends, cash flows, management capability, historical loss experience and economic conditions and prospects. Allowances are established when customer accounts are at risk of being uncollectible. Accounts receivable are written off at the time a customer receivable is deemed uncollectible.
Inventories	Inventories Inventories are stated at the lower of cost or net realizable value. Cost is determined using standard costs, which approximates the average cost method. Our policy is to expense abnormal amounts of idle facility expense, freight, handling cost, and waste included in cost of products sold. In addition, we allocate fixed production overheads based on the normal production capacity of our facilities. Inventory valuations were developed using normalized production capacities for each of our manufacturing locations. The costs from excess capacity or under-utilization of fixed production overheads were expensed in the period incurred and are not included as a component of inventory. Inventories also include tools, molds and dies in progress that we are producing and will ultimately sell to our customers. These inventories are also carried at the lower of cost or net realizable value.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation. Assets to be disposed of are stated at the lower of depreciated cost or fair market value less estimated selling costs. Expenditures for maintenance and repairs are charged to expense as incurred. Major renewals and betterments are capitalized. When a property item is retired, its cost and related accumulated depreciation are removed from the property accounts and any gain or loss is recorded in the consolidated Statements of Operations and Comprehensive Income (Loss). We review the carrying values of long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Property, plant and equipment also includes tools, molds and dies used in manufacturing. Depreciation is calculated based on historical cost using the straight-line method over the estimated useful lives of the depreciable assets. Estimated useful lives for buildings generally range from 15 to 40 years. Estimated useful lives for machinery and equipment generally range from 3 to 12 years. We depreciate leasehold improvements and buildings under capital lease over the shorter of the leased asset’s useful life or the lease term.
Goodwill and Other Indefinite Lived Intangible Assets	Goodwill and Other Indefinite Lived Intangible Assets Goodwill is tested for impairment on an annual basis in the fourth quarter and between annual tests if a triggering event occurs. The impairment analysis is performed at the reporting unit level. We have the option to make a qualitative assessment of whether it is more-likely-than-not two-step two-step two-step If the qualitative assessment indicates it is more likely than not that the fair value is less than the carrying value, GAAP prescribes a two-step If the carrying value of the reporting unit including goodwill is less than fair value of the reporting unit, the goodwill is not considered impaired. If the carrying value is greater than fair value then the potential for impairment of goodwill exists. The potential impairment is determined by allocating the fair value of the reporting unit among the assets and liabilities based on a purchase price allocation methodology as if the reporting unit was acquired in a business combination. The fair value of the goodwill is implied from this allocation and compared to the carrying value with an impairment loss recognized if the carrying value is greater than the implied fair value. We base our fair value estimates, in large part, on management business plans and projected financial information which are subject to a high degree of management judgment and complexity. Actual results may differ from projections, and the differences may be material.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets Long-lived tangible and intangible assets subject to amortization are tested for recoverability when changes in circumstances indicate the carrying value of these assets may not be recoverable. A test for recoverability is also performed when management has committed to a plan to dispose of a reporting unit or asset group. Assets to be held and used are tested for recoverability when indications of impairment are evident. Recoverability of a long-lived tangible or intangible asset is evaluated by comparing its carrying value to the future estimated undiscounted cash flows expected to be generated by the asset or asset group. If the asset is not recoverable the asset is considered impaired and adjusted to fair value which is then depreciated or amortized over its remaining useful life. Assets to be disposed of are recorded at the lesser of carrying value or fair value less costs of disposal.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. Provision has not been made for income taxes on unremitted earnings of foreign subsidiaries as these earnings are deemed to be permanently reinvested. We recognize income tax positions that meet the more likely than not threshold and accrue interest and potential penalties related to unrecognized income tax positions which are recorded as a component of the provision (benefit) for income taxes.
Revenue Recognition	Revenue Recognition We recognize revenues based on the stated shipping terms with customers when these terms are satisfied and the risks of ownership are transferred to the customers. We have an inventory management program for certain customers whereby revenue is recognized when products are used by customers from consigned stock rather than at the time of shipment. Under both circumstances, revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the sellers’ price is fixed and determinable, and collectability is reasonably assured.
Share Based Compensation	Share Based Compensation The cost of stock options, restricted stock and performance share units are recognized as compensation expense over the vesting periods based on the grant date fair value, net of expected forfeitures. We determine grant date fair value using the Black Scholes financial pricing model for our stock options and a Monte Carlo simulation for the performance share units because these awards are not traded in open markets. We account for restricted stock by recognizing compensation expense ratably over the vesting period as specified in the award agreement. Compensation expense to be recognized is based on the closing stock price on the date of grant. Upon the adoption of ASU 2016-09
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of our foreign subsidiaries are translated at current exchange rates. Revenue, costs and expenses are translated at average rates prevailing during each reporting period. Translation adjustments arising from the translation of foreign subsidiary financial statements are reported as a component of other comprehensive income and accumulated other comprehensive income (“AOCI”) within stockholders’ equity. Transactions denominated in foreign currencies, including intercompany transactions, are initially recorded at the current exchange rate at the date of the transaction. The balances are adjusted to the current exchange rate as of each balance sheet date and as of the date when the transaction is consummated. Transaction gains or losses, excluding intercompany loan transactions, are expensed as incurred in either cost of products sold or selling, general and administrative expense in the Consolidated Statements of Operations and Comprehensive Income (Loss) and were immaterial to the years ended December 31, 2017, 2016 and 2015. Transaction gains or losses on intercompany loan transactions are recognized as incurred in the “Other (income) expense, net” line in the Consolidated Statements of Operations and Comprehensive Income (Loss).
Net Income Per Common Share	Net Income Per Common Share Basic income per share reflects reported earnings divided by the weighted average number of common shares outstanding. Diluted income per share includes the effect of dilutive stock options and the respective tax benefits, unless inclusion would not be dilutive.
Business Combinations	Business Combinations We allocate the total purchase price of tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the business combination date, with the excess purchase price recorded as goodwill. The purchase price allocation process requires us to use significant estimates and assumptions, including fair value estimates, as of the business combination date. Although we believe the assumptions and estimates we have made are reasonable and appropriate, they are based in part on historical experience and information obtained from management of the acquired company. Our assumptions and estimates are also partially based on valuation models that incorporate projections of expected future cash flows and operating plans and are inherently uncertain. Valuations are performed by management or third-party valuation specialists under management’s supervision. In determining the fair value of assets acquired and liabilities assumed in business combinations, as appropriate, we may use one of the following recognized valuation methods: the income approach (including discounted cash flows from relief from royalty and excess earnings model), the market approach, or the replacement cost approach. Examples of significant estimates used to value certain intangible assets acquired include but are not limited to: • sales volume, pricing and future cash flows of the business overall; • future expected cash flows from customer relationships, and other identifiable intangible assets, including future price levels, rates of increase in revenue and appropriate attrition rate; • the acquired company’s brand and competitive position, royalty rate quantum, as well as assumptions about the period of time the acquired brand will continue to benefit to the combined company’s product portfolio; and • cost of capital, risk-adjusted discount rates and income tax rates. Different assumptions regarding projected performance and other factors associated with the acquired assets may affect the amount recorded under each type of asset and liability. The valuations of property, plant and equipment, intangible assets, goodwill and deferred income tax liabilities depend heavily on assumptions. Subsequent assessment could result in future impairment charges. We refine these estimates over a measurement period not to exceed one year to reflect new information obtained surrounding facts and circumstances existing at the acquisition date.

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Summary of Discontinued Operations	The following table summarizes the major line items included in the results of operations of the discontinued operations. Year Ended December 31, 2017 (1) 2016 2015 Net sales $ 168,287 $ 248,534 $ 261,837 Cost of products sold (exclusive of depreciation and 130,555 192,994 205,361 Selling, general and administrative expense 11,818 16,992 17,468 Depreciation and amortization 7,722 11,852 11,496 (Gain) loss on disposal of assets — 27 — Restructuring and integration expense 429 4,366 2,019 Income from operations 17,763 22,303 25,493 Interest income (expense) (181 ) (284 ) (317 ) Interest and other income (expense) (84 ) 503 (654 ) Income from discontinued operations before gain on disposal 17,498 22,522 24,522 Provision for income taxes on discontinued operations (7,461 ) (6,369 ) (6,633 ) Income from discontinued operations before gain on disposal 10,037 16,153 17,889 Gain on disposal of discontinued operations 213,503 — — Provision for income taxes on gain on disposal (85,852 ) — — Income from discontinued operations, net of tax $ 137,688 $ 16,153 $ 17,889 (1) Includes the results of operations of the PBC Business from January 1 to August 17, 2017. The following table summarizes the carrying amounts of major classes of assets and liabilities of discontinued operations for each of the periods presented. As of December 31, 2017 2016 Cash $ — $ 8,134 Accounts receivable, net — 46,114 Inventories — 47,714 Other current assets — 4,755 Total current assets of discontinued operations — 106,717 Property, plant and equipment, net — 92,373 Goodwill — 8,909 Intangible assets, net — 1,718 Other non-current — 940 Total non-current — 103,940 Total assets of discontinued operations $ — $ 210,657 Accounts payable $ — $ 31,014 Accrued salaries, wages and benefits — 9,234 Income taxes payable — 2,825 Other current liabilities — 2,176 Total current liabilities of discontinued operations — 45,249 Deferred tax liabilities — 4,173 Accrued post-employment benefits — 4,707 Other non-current — 3,731 Total non-current — 12,611 Total liabilities of discontinued operations $ — $ 57,860 The following table presents the significant noncash items and cash paid for capital expenditures of discontinued operations for each period presented. Year Ended December 31, 2017 2016 2015 Depreciation and amortization $ 7,722 $ 11,852 $ 11,496 Acquisition of property, plant and equipment $ 7,316 $ 11,926 $ 15,111

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2017
Precision Engineered Products Group [Member]
Summary of Final Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the final purchase price allocation for the PEP Acquisition. As of Subsequent Final as of Consideration: Cash paid $ 621,196 $ — $ 621,196 Cash adjustment — (1,635 ) (1,635 ) Total consideration $ 621,196 $ (1,635 ) $ 619,561 Fair value of assets acquired and liabilities assumed Current assets $ 69,331 $ 452 $ 69,783 Property, plant and equipment 56,163 (962 ) 55,201 Intangible assets subject to amortization 240,490 — 240,490 Other non-current 1,500 — 1,500 Goodwill (1) 372,709 (1,805 ) 370,904 Total assets acquired 740,193 (2,315 ) 737,878 Current liabilities (2) 21,354 — 21,354 Non-current 95,435 (680 ) 94,755 Other non-current 2,208 — 2,208 Total liabilities assumed 118,997 (680 ) 118,317 Net assets acquired $ 621,196 $ (1,635 ) $ 619,561 (1) Goodwill includes $8.3 million of prior period revisions (Note 1 and Note 21). (2) Current liabilities include $0.2 million of prior period revisions (Note 1 and Note 21). (3) Non-current (4) Other non-current
DRT Medical, LLC, ("DRT Medical") [Member]
Summary of Final Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the components of the preliminary purchase price allocation for the Vandalia Acquisition. Fair value of assets acquired and liabilities assumed As of Current assets $ 10,166 Property, plant and equipment 13,981 Intangible assets subject to amortization 6,900 Other non-current 29 Goodwill 9,452 Total assets acquired 40,528 Current liabilities 1,794 Total liabilities assumed 1,794 Net assets acquired $ 38,734

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	he following table presents results of continuing operations for each reportable segment. There were no significant inter-segment transactions during the periods presented. Autocam Precision Corporate Total Year Ended December 31, 2017 Net sales $ 336,852 $ 282,941 $ — $ 619,793 Depreciation and amortization $ 24,491 $ 26,745 $ 1,170 $ 52,406 Income from operations $ 34,405 $ 36,711 $ (38,002 ) $ 33,114 Interest expense (52,085 ) Other (39,902 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (58,873 ) Share of net income from joint venture $ 5,211 $ 5,211 Expenditures for long-lived assets $ 24,056 $ 5,443 $ 6,907 $ 36,406 Year Ended December 31, 2016 Net sales $ 326,138 $ 258,816 $ — $ 584,954 Depreciation and amortization $ 22,189 $ 28,105 $ 427 $ 50,721 Income from operations $ 29,490 $ 33,900 $ (28,611 ) $ 34,779 Interest expense (62,870 ) Other (2,775 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (30,866 ) Share of net income from joint venture $ 5,938 $ 5,938 Expenditures for long-lived assets $ 23,077 $ 5,352 $ 3,465 $ 31,894 Year Ended December 31, 2015 Net sales $ 328,260 $ 77,183 $ — $ 405,443 Depreciation and amortization $ 21,472 $ 11,282 $ 219 $ 32,973 Income from operations $ 30,810 $ (3,806 ) $ (26,946 ) $ 58 Interest expense (29,582 ) Other (19,694 ) Loss from continuing operations before benefit for income taxes and share of net income from joint venture $ (49,218 ) Share of net income from joint venture $ 5,001 $ 5,001 Expenditures for long-lived assets $ 21,341 $ 728 $ 1,373 $ 23,442 Total Assets as of December 31, 2017 2016 2015 Autocam Precision Components Group (1) $ 428,321 $ 412,692 $ 416,504 Precision Engineered Products Group 738,766 720,362 747,804 Corporate and Consolidations 307,916 225,220 224,029 Total $ 1,475,003 $ 1,358,274 $ 1,388,337 (1) Total assets of our APC segment include $39.8 million, $36.0 million, and $36.3 million as of December 31, 2017, 2016, and 2015, respectively, related to the investment in our 49% owned joint venture (Note 10).
Summary of Sales to External Customers and Long-Lived Tangible Assets by Geographical Region	The following table summarizes sales to external customers and long-lived tangible assets by geographical region. Net Sales Year Ended December 31, Property, Plant, and Equipment, Net 2017 2016 2015 2017 2016 United States $ 437,838 $ 407,917 $ 275,152 $ 173,269 $ 155,784 Europe $ 40,334 $ 36,481 $ 32,736 $ 25,288 $ 21,069 Asia 62,657 64,177 46,092 26,078 19,936 Canada 2,176 1,921 861 — — Mexico 40,937 45,863 27,023 7,544 5,821 S. America 35,845 28,595 23,558 27,101 27,483 Other 6 — 21 — — All foreign countries $ 181,955 $ 177,037 $ 130,291 $ 86,011 $ 74,309 Total $ 619,793 $ 584,954 $ 405,443 $ 259,280 $ 230,093

Accounts Receivable and Sales34

Accounts Receivable and Sales Concentrations (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Summary of Accounts Receivables	Accounts receivable, net, are comprised of the following amounts: As of December 31, 2017 2016 Trade $ 110,165 $ 94,502 Less - allowance for doubtful accounts 1,719 1,069 Accounts receivable, net $ 108,446 $ 93,433
Summary of Activity in the Allowance for Doubtful Accounts	The following table presents activity in the allowance for doubtful accounts. Balance at Additions Write- Currency Balance at Year Ended December 31, 2017 $ 1,069 $ 648 $ (101 ) $ 103 $ 1,719 Year Ended December 31, 2016 $ 1,055 $ 153 $ (59 ) $ (80 ) $ 1,069 Year Ended December 31, 2015 $ 362 $ 729 $ (8 ) $ (28 ) $ 1,055

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2017
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories are comprised of the following amounts: As of December 31, 2017 2016 Raw materials $ 37,337 $ 36,080 Work in process 27,669 22,645 Finished goods 17,611 8,412 Inventories $ 82,617 $ 67,137

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment	Property, plant and equipment are comprised of the following amounts: As of December 31, 2017 2016 Land and buildings $ 54,833 $ 51,992 Machinery and equipment 302,470 251,295 Construction in progress 14,346 10,786 371,649 314,073 Less—accumulated depreciation 112,369 83,980 Property, plant and equipment, net $ 259,280 $ 230,093

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The following table shows changes in the carrying amount of goodwill, for the years ended December 31, 2017, 2016 and 2015. Autocam Precision Total Balance as of December 31, 2015 $ 73,864 $ 374,535 $ 448,399 Currency impacts (601 ) (2,464 ) (3,065 ) Adjustments to goodwill — (1,805 ) (1,805 ) Balance as of December 31, 2016 $ 73,263 $ 370,266 $ 443,529 Currency impacts 884 747 1,631 Goodwill acquired in acquisition — 9,452 9,452 Balance as of December 31, 2017 $ 74,147 $ 380,465 $ 454,612

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Carrying Amount of Intangible Assets by Segment and by Major Asset Class	The following table presents the carrying amount of intangible assets by segment and by major asset class. Autocam Precision Total Balance as of December 31, 2015 $ 46,417 $ 233,800 $ 280,217 Amortization (3,533 ) (22,465 ) (25,998 ) Currency impacts 44 — 44 Balance as of December 31, 2016 $ 42,928 $ 211,335 $ 254,263 Additions — 6,900 6,900 Amortization (3,481 ) (19,979 ) (23,460 ) Currency impacts (1 ) — (1 ) Balance as of December 31, 2017 $ 39,446 $ 198,256 $ 237,702 December 31, 2017 December 31, 2016 Estimated Useful Gross Accumulated Net Gross Accumulated Net Customer relationships 12 - 15 $ 282,030 $ (52,408 ) $ 229,622 $ 275,130 $ (30,137 ) $ 244,993 Other 1 - 15 19,200 (11,120 ) 8,080 19,217 (9,947 ) 9,270 Total identified intangible assets $ 301,230 $ (63,528 ) $ 237,702 $ 294,347 $ (40,084 ) $ 254,263
Summary of Estimated Amortization Expense	The following table summarizes estimated amortization expense for the next five years: Year Ending December 31, 2018 $ 23,878 2019 23,810 2020 23,670 2021 23,678 2022 23,678

Investment in Joint Venture (Ta

Investment in Joint Venture (Tables)	12 Months Ended
	Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Summarized Activity Related to Investment in Joint Venture	The following table summarizes activity related to our investment in the JV. Balance as of December 31, 2016 $ 36,008 Our share of cumulative earnings 5,582 Dividends declared and paid by joint venture (4,156 ) Accretion of basis difference from purchase accounting (371 ) Foreign currency translation gain 2,759 Balance as of December 31, 2017 $ 39,822
Summarized Balance Sheet Information of Unconsolidated Joint Venture	The following tables present summarized financial information of the unconsolidated JV. As of December 31, 2017 2016 Current assets $ 47,600 $ 31,295 Non-current 24,763 22,522 Total assets $ 72,363 $ 53,817 Current liabilities $ 26,165 $ 13,549 Total liabilities $ 26,165 $ 13,549
Summarized Income Statement Information of Unconsolidated Joint Venture	Year Ended December 31, 2017 2016 2015 Net sales $ 74,805 $ 65,756 $ 55,962 Cost of sales $ 57,514 $ 44,530 $ 37,283 Income from operations $ 13,659 $ 16,268 $ 13,972 Net income $ 11,442 $ 13,702 $ 11,525

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Loss from Continuing Operations Before Benefit for Income Taxes	Loss from continuing operations before benefit for income taxes was as follows: Year ended December 31, 2017 2016 2015 Income / (Loss) from continuing operations before expense / (benefit) for income taxes and share of net income from joint venture United States (71,603 ) (39,160 ) (50,831 ) Foreign 12,730 8,294 1,613 Total (58,873 ) (30,866 ) (49,218 )
Income Tax Benefit	Total income tax benefit was as follows: Year ended December 31, 2017 2016 2015 Tax Expense: Current: U.S. Federal (47,916 ) (2,595 ) (2,228 ) State (12,226 ) 679 189 Foreign 4,310 2,004 1,340 Total current expense (55,832 ) 88 (699 ) Deferred: U.S. Federal (25,017 ) (9,679 ) (16,007 ) State 3,009 (6,406 ) (1,913 ) Deferred tax valuation allowance 710 1,882 — Foreign (1,896 ) (1,323 ) (1,223 ) Total deferred expense (benefit) (23,194 ) (15,526 ) (19,143 ) Total expense (benefit) (79,026 ) (15,438 ) (19,842 )
Reconciliation of Income Taxes Based on U.S. Federal Statutory Rate	A reconciliation of income taxes based on the U.S. federal statutory rate is summarized as follows: Year ended December 31, 2017 2016 2015 Rate Rec: Percentages Income taxes at the federal statutory rate 35.0 % 34.0 % 34.0 % Change in valuation allowance -1.2 % -6.1 % 0.0 % Foreign tax credits, exclusive of tax reform -13.8 % 8.2 % 2.7 % State taxes, net of federal taxes, exclusive of tax reform 9.1 % 5.7 % 3.6 % Non-U.S. earnings taxed at different rates 1.7 % 4.8 % 3.2 % Non-deductible mergers and acquisitions costs 0.0 % 0.0 % -2.6 % R&D Tax credit 0.3 % 0.9 % 1.3 % Change in uncertain tax positions -0.4 % 3.2 % 0.0 % Impact of Tax Reform Toll Charge, net of foreign tax credit -11.5 % 0.0 % 0.0 % Remeasurement of deferred taxes pursuant to tax reform 65.6 % 0.0 % 0.0 % Tax Reform impact on divestiture of business segment 33.9 % 0.0 % 0.0 % Section 199/Domestic Production Deduction 0.8 % 0.0 % 0.0 % Divestiture of Business Segment, exclusive of tax reform 13.6 % 0.0 % 0.0 % Prior period revisions 0.5 % 4.2 % 1.8 % Foreign JV Net Income 0.0 % -4.1 % -2.3 % Other adjustments, net 0.7 % -0.8 % -1.3 % 134.2 % 50.0 % 40.3 %
Principal Components of Deferred Tax Assets and Liabilities	The principal components of the deferred tax assets and liabilities are as follows: Summary of Deferred’s Deferred income tax liabilities: Tax in excess of book depreciation 34,143 40,389 39,447 Goodwill 58 23 — Intangible assets 50,688 86,492 91,947 Other deferred tax liabilities 389 720 (0 ) Total deferred income tax liabilities 85,278 127,624 131,394 Deferred income tax assets: Goodwill 2,067 1,165 1,697 Inventories 2,248 740 4,370 Pension/Personnel accruals 1,596 1,395 2,669 Net operating loss carry forwards 6,950 10,297 6,289 Foreign tax credits — 5,759 3,242 Guarantee claim deduction — 414 1,141 Credit carry forwards 3,427 4,581 4,958 Accruals and reserves 2,015 1,151 0 Other deferred tax assets 3,019 10,193 2,084 Deferred income tax assets before Valuation Allowance 21,322 35,695 26,451 Valuation allowance on deferred tax assets (7,608 ) (4,090 ) (2,376 ) Total deferred income tax assets 13,714 31,605 24,075 Net deferred income tax liabilities (1) 71,564 96,019 107,319 (1) In accordance with the U.S. Tax Cuts and Jobs Act of 2017, our ending domestic deferred balances have been remeasured to 21% for the year ended December 31, 2017.
Summary of Activity in Total Valuation Allowances	The following table summarizes our total valuation allowances: Balance at Additions Recoveries Reprice Balance at Year ended December 31, 2017 $ 4,090 $ 3,518 $ — $ — $ 7,608 Year ended December 31, 2016 $ 2,376 $ 1,882 $ (168 ) $ — $ 4,090 Year ended December 31, 2015 $ — $ 2,376 $ — $ — $ 2,376
Summary of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits, Excluding Interest and Penalties	A reconciliation of the beginning and ending amounts of unrecognized tax benefits, excluding interest and penalties, is as follows: Year Ended December 31, 2017 2016 2015 Beginning balance $ 4,741 $ 5,724 $ 3,834 Additions for tax positions of prior years 1,404 179 2,516 Reductions for tax positions of prior years (490 ) (1,162 ) (626 ) Ending balance $ 5,655 $ 4,741 $ 5,724

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Summary of Debt	The following table presents debt balances as of December 31, 2017 and 2016. As of December 31, 2017 2016 $545.0 million Senior Secured Term Loan B (“Senior Secured Term Loan”) bearing interest at the greater of 0.75% or one-month $ 534,250 $ 543,563 $300.0 million Incremental Term Loan (“Incremental Term Loan”) bearing interest at one-month 291,000 — $143.0 million Senior Secured Revolver (“Senior Secured Revolver”) bearing interest at one-month — 27,977 $250.0 million Senior Notes (“Senior Notes”) bearing interest at 10.25% — 250,000 French Safeguard Obligations 290 358 Brazilian lines of credit and equipment notes 257 573 Chinese line of credit 2,768 2,619 Total 828,565 825,090 Less current maturities of long-term debt 17,283 12,751 Principal, net of current portion 811,282 812,339 Less unamortized debt issuance costs 20,477 26,626 Long-term debt, net of current portion $ 790,805 $ 785,713
Aggregate Maturities of Long-Term Debt	The following table lists aggregate maturities of long-term debt for the next five years and thereafter. Year Ending December 31, Aggregate 2018 $ 17,283 2019 17,968 2020 17,752 2021 260,750 2022 514,812 Thereafter — Total outstanding principal $ 828,565

Restructuring and Integration (

Restructuring and Integration (Tables)	12 Months Ended
	Dec. 31, 2017
Wheeling Plant [Member]
Summary of Restructuring and Integration Charges and Reserve Activity	The following tables summarize restructuring and integration charges for the years ended December 31, 2017, 2016, and 2015. Year Ended December 31, 2017 APC PEP Corporate and Total Severance and other costs $ 17 $ — $ — $ 17 Site closure and other associated costs 369 — — 369 Total $ 386 $ — $ — $ 386 Year Ended December 31, 2016 APC PEP Corporate and Total Severance and other costs $ 851 $ 836 $ — $ 1,687 Site closure and other associated costs 3,488 483 — 3,971 Total $ 4,339 $ 1,319 $ — $ 5,658 Year Ended December 31, 2015 APC PEP Corporate and Total Severance and other costs $ 672 $ 850 $ — $ 1,522 Site closure and other associated costs 1,962 — 1,765 3,727 Total $ 2,634 $ 850 $ 1,765 $ 5,249 The following tables summarize restructuring and integration reserve activity for the years ended December 31, 2017, 2016, and 2015. Reserve Charges Non-cash Cash Reserve Severance and other costs $ 1,000 $ 17 $ (164 ) $ (853 ) $ — Site closure and other associated costs 1,625 369 — (895 ) 1,099 Total $ 2,625 $ 386 $ (164 ) $ (1,748 ) $ 1,099 Reserve Charges Non-cash Cash Reserve Severance and other costs $ 887 $ 1,687 $ (278 ) $ (1,296 ) $ 1,000 Site closure and other associated costs 1,845 3,971 (2,142 ) (2,049 ) 1,625 Total $ 2,732 $ 5,658 $ (2,420 ) $ (3,345 ) $ 2,625 Reserve Charges Non-cash Cash Reserve Severance and other costs $ — $ 1,522 $ (408 ) $ (227 ) $ 887 Site closure and other associated costs — 3,727 (1,882 ) — 1,845 Total $ — $ 5,249 $ (2,290 ) $ (227 ) $ 2,732

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule by Year of Future Minimum Lease Payments	The following table summarizes future minimum lease payments as of December 31, 2017, under operating leases that have initial or remaining non-cancelable Year Ending December 31, Minimum 2018 $ 8,616 2019 9,576 2020 8,670 2021 7,255 2022 6,937 Thereafter 36,075 Total minimum payments $ 77,129

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Components of Share-Based Compensation Expense by Type of Award	The following table lists the components of share-based compensation cost by type of award. Year Ended December 31, 2017 2016 2015 Stock options $ 1,078 $ 687 $ 984 Restricted stock 1,968 2,061 2,623 Performance share units 2,450 1,187 432 Share-based compensation $ 5,496 $ 3,935 $ 4,039
Weighted Average Assumptions Relevant to Determining the Fair Value at the Dates of Grant and Stock Option Modification	The following table shows the weighted average assumptions relevant to determining the fair value of stock options granted in each year. 2017 2016 2015 Expected term 6 years 6 years 6 years Risk free interest rate 2.03 % 1.43 % 1.43 % Dividend yield 1.16 % 2.48 % 1.11 % Expected volatility 56.56 % 59.23 % 59.22 % Expected forfeiture rate 3.00 % 3.00 % 3.00 %
Reconciliation of Option Activity	The following table summarizes option activity for the year ended December 31, 2017. Options Shares Weighted- Weighted- Aggregate Outstanding at January 1, 2017 897 $ 12.22 Granted 126 24.20 Exercised (263 ) 11.84 $ 3,784 Forfeited or expired (14 ) 14.34 Outstanding at December 31, 2017 746 $ 14.33 6.2 $ 9,900 (1) Exercisable at December 31, 2017 573 $ 12.75 5.5 $ 8,506 (1) (1) The intrinsic value is the amount by which the closing market price of our stock as of December 31, 2017, was greater than the exercise price of any individual option grant.
Reconciliation of Restricted Stock Option Activity	The following table summarizes the status of unvested restricted stock awards as of December 31, 2017, and changes during the year then ended. Nonvested Weighted Nonvested at January 1, 2017 202 $ 15.01 Granted 85 $ 24.29 Vested (135 ) $ 15.63 Forfeited — $ — Nonvested at December 31, 2017 152 $ 19.21
Schedule of Performance Based Awards Goals with Respect to TSR and ROIC	The following table presents the goals with respect to TSR and ROIC for each award. TSR: Threshold Performance (50% of Shares) Target Performance (100% of Shares) Maximum Performance (150% of Shares) 2017 grants 35th Percentile 50th Percentile 75th Percentile 2016 grants 35th Percentile 50th Percentile 75th Percentile 2015 grants 35th Percentile 50th Percentile 75th Percentile ROIC: Threshold Performance (35% of Shares) Target Performance (100% of Shares) Maximum Performance (150% of Shares) 2017 grants 15 % 17.5 % 20 % 2016 grants 15.5 % 18 % 20.5 % 2015 grants 11 % 12.5 % 14 %
Schedule of Number of Awards Granted and Grant Date Fair Value of Each Award in Periods	The following table presents the number of awards granted and the grant date fair value of each award in the periods presented. TSR Awards ROIC Awards Award Year Shares Grant Date Shares (in Grant Date 2017 46 $ 29.84 53 $ 24.20 2016 101 $ 9.38 101 $ 11.31 2015 36 $ 28.61 36 $ 25.16
Summary of Status of Unvested PSU Awards	The following table summarizes the status of unvested PSU awards as of December 31, 2017, and changes during the year then ended. Nonvested TSR Awards Nonvested ROIC Awards Shares Weighted Grant-Date Shares Weighted Grant-Date Nonvested at January 1, 2017 124 $ 14.33 124 $ 14.87 Change in Vesting Estimate (1) — $ — 16 $ 25.16 Granted 46 $ 29.84 53 $ 24.20 Vested (32 ) $ 28.61 (48 ) $ 25.16 Forfeited (8 ) $ 19.19 (9 ) $ 18.03 Nonvested at December 31, 2017 130 $ 16.60 136 $ 16.27 (1) Represents additional shares expected to be issued in settlement of ROIC Awards that were granted in 2015.

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Summary of Net Income (Loss) Per Share	The following summarizes the computation of basic and diluted net income (loss) per share. Year Ended December 31, 2017 2016 2015 Income (loss) from continuing operations $ 25,364 $ (9,490 ) $ (24,375 ) Income from discontinued operations, net of tax 137,688 16,153 17,889 Net income (loss) $ 163,052 $ 6,663 $ (6,486 ) Weighted average shares outstanding 27,433 27,016 21,181 Effect of dilutive stock options 322 — — Diluted shares outstanding 27,755 27,016 21,181 Basic income (loss) from continuing operations per share $ 0.92 $ (0.35 ) $ (1.15 ) Basic income from discontinued operations per share 5.02 0.60 0.84 Basic net income (loss) per share $ 5.94 $ 0.25 $ (0.31 ) Diluted income (loss) from continuing operations per share $ 0.91 $ (0.35 ) $ (1.15 ) Diluted income from discontinued operations per share 4.96 0.60 0.84 Diluted net income (loss) per share $ 5.87 $ 0.25 $ (0.31 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Summary Of Fair Value Estimates For Financial And Nonfinancial Assets And Liabilities Measured At Fair Value On Nonrecurring Basis	The following table summarizes the fair value estimates for financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis by category as of the acquisition date: Fair Value Measurements During 2017, Using Description Fair Value Quoted Prices in Significant Other Significant Vandalia current assets $ 10,166 $ — $ — $ 10,166 Vandalia property, plant and equipment 13,981 — — 13,981 Vandalia intangible assets subject to amortization 6,900 — — 6,900 Vandalia other non-current 29 — — 29 Vandalia goodwill 9,452 — — 9,452 Vandalia non-current (1,794 ) — — (1,794 ) $ 38,734 $ — $ — $ 38,734
Summay of Fair Value Estimates for Financial and Nonfinancial Assets and Liabilities Measured at Fair Value on Nonrecurring basis	The following table summarizes assets and liabilities measured at fair value on a recurring basis for the interest rate swap derivative financial instrument as of December 31, 2016. Fair Value Measurements as of December 31, 2016 Description December 31, Quoted Prices in Significant Other Significant Derivative asset—current $ 69 $ — $ 69 $ — Derivative asset—noncurrent 6 — 6 — Derivative liability—current (1,903 ) — (1,903 ) — Derivative liability—noncurrent (1,028 ) — (1,028 ) — $ (2,856 ) $ — $ (2,856 ) $ —

Quarterly Results of Operatio47

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Summary of Unaudited Quarterly Results of Operations	The following summarizes the unaudited quarterly results of operations for the fourth quarter ended December 31, 2017. Fourth Quarter 2017 Net sales $ 156,135 Cost of sales (exclusive of depreciation and amortization) 118,814 Income (loss) from continuing operations 53,325 Income from discontinued operations, net of tax (2,507 ) Net income (loss) 50,818 Comprehensive income (loss) 51,885 Basic income (loss) from continuing operations per share $ 1.93 Basic net income (loss) per share $ 1.84 Diluted income (loss) from continuing operations per share $ 1.91 Diluted net income (loss) per share $ 1.82 The effect of recasting the prior periods for the PBC discontinued operations as described in Note 2 is also reflected below. As Reported Adjustment Discontinued As Revised Third Quarter 2017 Net sales $ 148,156 $ — $ 148,156 Cost of sales (exclusive of depreciation and amortization) 110,836 436 111,272 Income (loss) from continuing operations (2,930 ) (550 ) (3,480 ) Income from discontinued operations, net of tax 135,825 (6,384 ) 129,441 Net income (loss) 132,895 (6,934 ) 125,961 Comprehensive income (loss) 129,735 (6,606 ) 123,129 Basic income (loss) from continuing operations per share $ (0.11 ) $ (0.02 ) $ (0.13 ) Basic net income (loss) per share $ 4.82 $ (0.25 ) $ 4.57 Diluted income (loss) from continuing operations per share $ (0.11 ) $ (0.02 ) $ (0.13 ) Diluted net income (loss) per share $ 4.82 $ (0.25 ) $ 4.57 Second Quarter 2017 Net sales $ 225,875 $ — $ (67,928 ) $ 157,947 Cost of sales (exclusive of depreciation and amortization) 166,040 — (51,526 ) 114,514 Income (loss) from continuing operations (21,529 ) 391 (5,236 ) (26,374 ) Income from discontinued operations, net of tax — — 5,236 5,236 Net income (loss) (21,529 ) 391 (21,138 ) Comprehensive income (loss) (12,289 ) 662 (11,627 ) Basic income (loss) from continuing operations per share $ (0.78 ) $ 0.01 $ (0.19 ) $ (0.96 ) Basic net income (loss) per share $ (0.78 ) $ 0.01 $ (0.77 ) Diluted income (loss) from continuing operations per share $ (0.78 ) $ 0.01 $ (0.19 ) $ (0.96 ) Diluted net income (loss) per share $ (0.78 ) $ 0.01 $ (0.77 ) First Quarter 2017 Net sales $ 226,314 $ — $ (68,759 ) $ 157,555 Cost of sales (exclusive of depreciation and amortization) 166,954 485 (52,959 ) 114,480 Income (loss) from continuing operations 7,407 4 (5,518 ) 1,893 Income from discontinued operations, net of tax — — 5,518 5,518 Net income (loss) 7,407 4 7,411 Comprehensive income (loss) 12,113 403 12,516 Basic income (loss) from continuing operations per share $ 0.27 $ 0.00 $ (0.20 ) $ 0.07 Basic net income (loss) per share $ 0.27 $ 0.00 $ 0.27 Diluted income (loss) from continuing operations per share $ 0.27 $ 0.00 $ (0.20 ) $ 0.07 Diluted net income (loss) per share $ 0.27 $ 0.00 $ 0.27 As Originally Reported Adjustment Discontinued As Revised Fourth Quarter 2016 Net sales $ 202,029 $ — $ (60,385 ) $ 141,644 Cost of sales (exclusive of depreciation and amortization) 151,936 466 (47,597 ) 104,805 Income (loss) from continuing operations 3,063 (1,512 ) (3,737 ) (2,186 ) Income from discontinued operations, net of tax — — 3,737 3,737 Net income (loss) 3,063 (1,512 ) 1,551 Comprehensive income (loss) (10,212 ) (90 ) (10,302 ) Basic income (loss) from continuing operations per share $ 0.11 $ (0.06 ) $ (0.14 ) $ (0.08 ) Basic net income (loss) per share $ 0.11 $ (0.06 ) $ 0.06 Diluted income (loss) from continuing operations per share $ 0.11 $ (0.06 ) $ (0.14 ) $ (0.08 ) Diluted net income (loss) per share $ 0.11 $ (0.06 ) $ 0.06 Third Quarter 2016 Net sales $ 204,961 $ — $ (58,247 ) $ 146,714 Cost of sales (exclusive of depreciation and amortization) 152,538 91 (45,353 ) 107,276 Income (loss) from continuing operations 4,147 419 (3,622 ) 944 Income from discontinued operations, net of tax — — 3,622 3,622 Net income (loss) 4,147 419 4,566 Comprehensive income (loss) 8,740 (2,938 ) 5,802 Basic income (loss) from continuing operations per share $ 0.15 $ 0.02 $ (0.13 ) $ 0.03 Basic net income (loss) per share $ 0.15 $ 0.02 $ 0.17 Diluted income (loss) from continuing operations per share $ 0.15 $ 0.02 $ (0.13 ) $ 0.03 Diluted net income (loss) per share $ 0.15 $ 0.02 $ 0.17 Second Quarter 2016 Net sales $ 214,272 $ — $ (65,157 ) $ 149,115 Cost of sales (exclusive of depreciation and amortization) 156,794 114 (49,580 ) 107,328 Income (loss) from continuing operations 2,031 (172 ) (4,326 ) (2,467 ) Income from discontinued operations, net of tax — — 4,326 4,326 Net income (loss) 2,031 (172 ) 1,859 Comprehensive income (loss) (973 ) (1,879 ) (2,852 ) Basic income (loss) from continuing operations per share $ 0.08 $ (0.01 ) $ (0.16 ) $ (0.09 ) Basic net income (loss) per share $ 0.08 $ (0.01 ) $ 0.07 Diluted income (loss) from continuing operations per share $ 0.07 $ (0.01 ) $ (0.16 ) $ (0.09 ) Diluted net income (loss) per share $ 0.07 $ (0.01 ) $ 0.07 First Quarter 2016 Net sales $ 212,226 $ — $ (64,745 ) $ 147,481 Cost of sales (exclusive of depreciation and amortization) 159,754 144 (50,464 ) 109,434 Income (loss) from continuing operations (1,299 ) (14 ) (4,468 ) (5,781 ) Income from discontinued operations, net of tax — — 4,468 4,468 Net income (loss) (1,299 ) (14 ) (1,313 ) Comprehensive income (loss) 4,418 884 5,302 Basic income (loss) from continuing operations per share $ (0.05 ) $ (0.00 ) $ (0.17 ) $ (0.22 ) Basic net income (loss) per share $ (0.05 ) $ (0.00 ) $ (0.05 ) Diluted income (loss) from continuing operations per share $ (0.05 ) $ (0.00 ) $ (0.17 ) $ (0.22 ) Diluted net income (loss) per share $ (0.05 ) $ (0.00 ) $ (0.05 )

Prior Periods' Financial Stat48

Prior Periods' Financial Statement Revision (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Schedule of Correction of Misstatements and Revision on Consolidated Statements	The following tables present the effect of the correction of the misstatements and the revision on the Consolidated Statements of Operations and Comprehensive Income (Loss), as further described in Note 1. Also, as further described in Note 2, due to the disposition of PBC and the related discontinued operations treatment, the tables below present separately the impact of the correction of the misstatements as well as the effect of recasting the prior periods for the PBC discontinued operations. Year Ended December 31, 2016 As Originally Adjustment Discontinued As Revised Cost of sales (exclusive of depreciation and amortization) $ 621,022 $ 815 $ (192,994 ) $ 428,843 Selling, general and administrative expense 80,266 870 (16,992 ) 64,144 Depreciation and amortization 62,488 85 (11,852 ) 50,721 Other operating expense (income) 288 548 (27 ) 809 Income from operations 59,400 (2,318 ) (22,303 ) 34,779 Loss on extinguishment of debt and write-off of unamortized debt issuance costs 3,089 (500 ) — 2,589 Other (income) expense, net (2,591 ) (783 ) 503 (2,871 ) Income (loss) from continuing operations before (7,309 ) (1,035 ) (22,522 ) (30,866 ) Provision (benefit) for income taxes (9,313 ) 244 (6,369 ) (15,438 ) Income (loss) from continuing operations 7,942 (1,279 ) (16,153 ) (9,490 ) Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Other comprehensive income (loss): Change in fair value of interest rate swap 3,015 (1,105 ) 1,910 Foreign currency translation loss (8,984 ) (1,639 ) (10,623 ) Other comprehensive loss (5,969 ) (2,744 ) (8,713 ) Comprehensive income (loss) $ 1,973 $ (4,023 ) $ (2,050 ) Basic net income (loss) per share $ 0.29 $ (0.05 ) $ 0.25 Diluted net income (loss) per share $ 0.29 $ (0.05 ) $ 0.25 Year Ended December 31, 2015 As Originally Adjustment Discontinued As Revised Selling, general and administrative expense $ 51,745 $ 596 $ (17,468 ) $ 34,873 Depreciation and amortization 44,482 (13 ) (11,496 ) 32,973 Other operating expense (income) (687 ) 663 — (24 ) Income (loss) from operations 26,797 (1,246 ) (25,493 ) 58 Loss on extinguishment of debt and write-off of unamortized debt issuance costs 18,673 500 — 19,173 Income (loss) from continuing operations before (22,950 ) (1,746 ) (24,522 ) (49,218 ) Provision (benefit) for income taxes (10,518 ) (2,691 ) (6,633 ) (19,842 ) Income (loss) from continuing operations (7,431 ) 945 (17,889 ) (24,375 ) Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Other comprehensive income (loss): Change in fair value of interest rate swap (2,584 ) 947 (1,637 ) Foreign currency translation loss (21,936 ) (2,967 ) (24,903 ) Other comprehensive loss (24,520 ) (2,020 ) (26,540 ) Comprehensive income (loss) $ (31,951 ) $ (1,075 ) $ (33,026 ) Basic net income (loss) per share $ (0.35 ) $ 0.04 $ (0.31 ) Diluted net income (loss) per share $ (0.35 ) $ 0.04 $ (0.31 ) The following table presents the effect of the correction of the misstatements on the Consolidated Balance Sheet as well as the effect of recasting the prior periods for the PBC discontinued operations. As of December 31, 2016 As Originally Adjustment Discontinued As Revised Income tax receivable $ — $ 1,041 $ 700 $ 1,741 Other current assets 11,752 32 (4,755 ) 7,029 Total current assets 280,555 1,073 700 282,328 Property, plant and equipment, net 322,953 (487 ) (92,373 ) 230,093 Goodwill 450,311 2,127 (8,909 ) 443,529 Investment in joint venture 40,694 (4,686 ) — 36,008 Other non-current 9,892 (839 ) (940 ) 8,113 Total assets 1,360,386 (2,812 ) 700 1,358,274 Accounts payable 75,719 (15 ) (31,014 ) 44,690 Accrued salaries, wages and benefits 24,996 1,464 (9,234 ) 17,226 Income tax payable 2,125 — (2,125 ) — Other current liabilities 23,025 (524 ) (2,176 ) 20,325 Total current liabilities 138,616 925 700 140,241 Deferred tax liabilities 99,591 600 (4,173 ) 96,018 Other non-current 21,267 1,471 (8,438 ) 14,300 Total liabilities 1,045,187 2,996 700 1,048,883 Retained earnings 55,509 (334 ) 55,175 Accumulated other comprehensive loss (25,122 ) (5,474 ) (30,596 ) Total stockholders’ equity 315,199 (5,808 ) 309,391 Total liabilities and stockholders’ equity 1,360,386 (2,812 ) 700 1,358,274 The following tables present the effect of the correction of the misstatements on our Consolidated Statements of Changes in Stockholders’ Equity. As of and for the Year Ended December 31, 2016 As Previously Adjustment As Revised Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Retained earnings 55,509 (334 ) 55,175 Change in fair value of interest rate swap 3,015 (1,105 ) 1,910 Share-based compensation expense 4,270 (335 ) 3,935 Foreign currency translation loss (8,984 ) (1,639 ) (10,623 ) Accumulated other comprehensive loss (25,122 ) (5,474 ) (30,596 ) Total stockholders’ equity 315,199 (5,808 ) 309,391 As of and for the Year Ended December 31, 2015 As Previously Adjustment As Revised Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Retained earnings 55,151 945 56,096 Change in fair value of interest rate swap (2,584 ) 947 (1,637 ) Share-based compensation expense 3,704 335 4,039 Foreign currency translation loss (21,936 ) (2,967 ) (24,903 ) Accumulated other comprehensive loss (19,153 ) (2,730 ) (21,883 ) Additional paid-in 277,582 335 277,917 Total stockholders’ equity 313,881 (1,450 ) 312,431 The following tables present the effect of the correction of the misstatements on our Consolidated Statements of Cash Flows. Year Ended December 31, 2016 As Adjustment Reclasses (1) As Revised Net income (loss) $ 7,942 $ (1,279 ) $ 6,663 Adjustments to reconcile net income to net cash provided by (used by) operating activities: Depreciation and amortization 62,488 85 62,573 Write-off of debt issuance costs 3,089 (500 ) 2,589 Compensation expense from issuance of share-based awards 4,270 (335 ) 3,935 Deferred income taxes (10,430 ) (5,096 ) (15,526 ) Other — (122 ) (122 ) Changes in operating assets and liabilities: Other current assets (269 ) (253 ) (522 ) Other non-current assets 1,833 548 2,381 Income taxes payable (receivable) — (501 ) 284 (217 ) Other liabilities 1,946 6,828 390 9,164 Net cash provided by (used by) operating activities 69,303 (625 ) 674 69,352 Cash flows from investing activities Proceeds from insurance claim — 122 122 Net cash provided by (used by) investing activities (41,346 ) 122 — (41,224 ) Cash flows from financing activities Proceeds from long-term debt (2) — 44,000 44,000 Repayment of long-term debt (2) (30,000 ) (25,000 ) (55,000 ) Proceeds from (repayment of) short-term debt, net 18,544 (19,000 ) (456 ) Proceeds from shares issued 2,832 (2,832 ) — Proceeds from issuance of stock and exercise of stock options — 2,832 2,832 Shares withheld to satisfy income tax withholding — (173 ) (173 ) Net cash provided by (used by) financing activities (24,308 ) — (173 ) (24,481 ) Effect of exchange rate changes on cash flows (4,331 ) — 2 (4,329 ) Net change in cash and cash equivalents (682 ) (503 ) 503 (682 ) Cash and cash equivalents at beginning of period 15,087 15,087 Cash and cash equivalents at end of period 14,405 (503 ) 503 14,405 Year Ended December 31, 2015 As Adjustment Reclasses (1) As Revised Net income (loss) $ (7,431 ) $ 945 $ (6,486 ) Adjustments to reconcile net income to net cash provided by (used by) operating activities: Depreciation and amortization 44,482 (13 ) 44,469 Write-off of debt issuance costs 18,673 500 19,173 Compensation expense from issuance of share-based awards 3,704 335 4,039 Deferred income taxes (16,878 ) (2,265 ) (19,143 ) Changes in operating assets and liabilities: Accounts receivable (1,343 ) (1,149 ) (2,492 ) Other current assets (944 ) 865 (79 ) Other non-current assets (1,501 ) 942 (559 ) Income taxes payable (receivable) — (540 ) 3,171 2,631 Other liabilities 4,999 (307 ) (1,251 ) 3,441 Accounts payable (6,748 ) (1,215 ) (7,963 ) Net cash provided by (used by) operating activities 33,310 (753 ) 771 33,328 Net cash provided by (used by) investing activities (665,838 ) — — (665,838 ) Cash flows from financing activities Shares withheld to satisfy income tax withholding — (231 ) (231 ) Net cash provided by (used by) financing activities 611,851 — (231 ) 611,620 Effect of exchange rate changes on cash flows (1,553 ) 215 (2 ) (1,340 ) Net change in cash and cash equivalents (22,230 ) (538 ) 538 (22,230 ) Cash and cash equivalents at beginning of period 37,317 37,317 Cash and cash equivalents at end of period 15,087 (538 ) 538 15,087 (1) Includes the reclassification of prior period amounts to reflect current period presentation for the adoption of ASU 2016-09 (see Note 1), as well as for the addition of the income taxes payable (receivable) line item. (2) The 2016 presentation of proceeds from and repayments of long-term debt were shown net. The adjustments made are to present these amounts gross for each activity (proceeds from and repayments of) during 2016.

Significant Accounting Polici49

Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)SegmentFacility	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Significant Accounting Policies [Line Items]
Number of reportable segments | Segment	3
Number of manufacturing facilities | Facility	44
Income tax expense	$ 6,800
Net profit change on contracts	163,052	$ 6,663	$ (6,486)
Cash paid for debt prepayment	$ 31,600
Maturity period of highly liquid investments	Three months or less
Land and Buildings [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	15 years
Land and Buildings [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	40 years
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	12 years
Joint Venture [Member]
Significant Accounting Policies [Line Items]
Investment in joint venture	49.00%
ASU 2016-09 [Member]
Significant Accounting Policies [Line Items]
Reclassification of tax benefits from deferred taxes to retained earnings	$ 700
Accounting Standards Update 2014-09 [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Net profit change on contracts	$ 100

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands	Aug. 17, 2017	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses		$ 371,436
Proceeds from divestiture of businesses other than cash			$ 46,114
Precision Bearing Components Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration of disposal group	$ 375,000
Proceeds from divestiture of businesses		387,600
Cash proceeds from divestiture of businesses		388,500
Proceeds from divestiture of businesses other than cash		800
Estimated after-tax gain on sale		$ 127,700
Gain on cumulative foreign currency translation	$ 9,300

Discontinued Operations - Summa

Discontinued Operations - Summary of Major Line Items Included in Results of Operations of Discontinued Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales	$ 168,287	$ 248,534	$ 261,837
Cost of products sold (exclusive of depreciation and amortization shown separately below)	130,555	192,994	205,361
Selling, general and administrative expense	11,818	16,992	17,468
Depreciation and amortization	7,722	11,852	11,496
(Gain) loss on disposal of assets		27
Restructuring and integration expense	429	4,366	2,019
Income from operations	17,763	22,303	25,493
Interest income (expense)	(181)	(284)	(317)
Interest and other income (expense)	(84)	503	(654)
Income from discontinued operations before gain on disposal and provision for income taxes	17,498	22,522	24,522
Provision for income taxes on discontinued operations	(7,461)	(6,369)	(6,633)
Income from discontinued operations before gain on disposal	10,037	16,153	17,889
Gain on disposal of discontinued operations	213,503
Provision for income taxes on gain on disposal	(85,852)
Income from discontinued operations, net of tax	$ 137,688	$ 16,153	$ 17,889

Discontinued Operations - Sum52

Discontinued Operations - Summary of Carrying Amounts of Major Classes of Assets and Liabilities of Discontinued Operations (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disposal Groups Including Discontinued Operations Income Statement Balance Sheet and Additional Disclosures [Abstract]
Cash	$ 8,134,000	$ 3,700,000	$ 9,100,000
Accounts receivable, net	46,114,000
Inventories	47,714,000
Other current assets	4,755,000
Total current assets of discontinued operations	106,717,000
Property, plant and equipment, net	92,373,000
Goodwill	8,909,000
Intangible assets, net	1,718,000
Other non-current assets	940,000
Total non-current assets of discontinued operations	103,940,000
Total assets of discontinued operations	210,657,000
Accounts payable	31,014,000
Accrued salaries, wages and benefits	9,234,000
Income taxes payable	2,825,000
Other current liabilities	2,176,000
Total current liabilities of discontinued operations	45,249,000
Deferred tax liabilities	4,173,000
Accrued post-employment benefits	4,707,000
Other non-current liabilities	3,731,000
Total non-current liabilities of discontinued operations	12,611,000
Total liabilities of discontinued operations	$ 57,860,000

Discontinued Operations - Sum53

Discontinued Operations - Summary of Significant Noncash Items and Cash Paid for Capital Expenditures of Discontinued Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operation, Alternative Cash Flow Information [Abstract]
Depreciation and amortization	$ 7,722	$ 11,852	$ 11,496
Acquisition of property, plant and equipment	$ 7,316	$ 11,926	$ 15,111

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 02, 2017	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Intangible assets		$ 6,900	$ 6,900
Goodwill		454,612	454,612	$ 443,529	$ 448,399
Acquisition related costs			344	0	11,682
Sales revenue			619,793	584,954	405,443
Net income			$ (163,052)	(6,663)	6,486
NN Life Sciences Vandalia LLC [Member]
Business Acquisition [Line Items]
Date of acquisition			Oct. 2, 2017
Cash payment to acquire business	$ 38,700
Acquisition percentage	100.00%
Working capital post-closing adjustment	$ 300
Intangible assets	6,900	6,900	$ 6,900
Goodwill	$ 9,452	9,452	9,452
Acquisition related costs		200	$ 300
Sales revenue		6,700
Net income		$ 500
Precision Engineered Products Group [Member]
Business Acquisition [Line Items]
Date of acquisition			Oct. 19, 2015
Cash payment to acquire business				621,196	621,196
Intangible assets				240,490	240,490
Goodwill				$ 370,904	$ 372,709

Acquisitions - Summary of Final

Acquisitions - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Oct. 02, 2017	Oct. 19, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Consideration:
Property, plant and equipment				$ 58,100	$ 14,000
Intangible assets subject to amortization					6,900
Goodwill			$ 443,529	448,399	454,612
NN Life Sciences Vandalia LLC [Member]
Consideration:
Cash paid	$ 38,700
Current assets	10,166				10,166
Property, plant and equipment	13,981				13,981
Intangible assets subject to amortization	6,900				6,900
Other non-current assets	29				29
Goodwill	9,452				9,452
Total assets acquired	40,528
Current liabilities	1,794
Total liabilities assumed	1,794				1,794
Net assets acquired	$ 38,734				$ 38,734
Precision Engineered Products Group [Member]
Consideration:
Cash paid			621,196	621,196
Cash adjustment			(1,635)
Total consideration			619,561	621,196
Current assets			69,783	69,331
Property, plant and equipment			55,201	56,163
Intangible assets subject to amortization			240,490	240,490
Other non-current assets			1,500	1,500
Goodwill			370,904	372,709
Total assets acquired			737,878	740,193
Current liabilities			21,354	21,354
Non-current deferred tax liabilities			94,755	95,435
Other non-current liabilities			2,208	2,208
Total liabilities assumed			118,317	118,997
Net assets acquired			$ 619,561	$ 621,196
Precision Engineered Products Group [Member] | Subsequent Adjustments to Fair Value [Member]
Consideration:
Cash adjustment		$ (1,635)
Total consideration		(1,635)
Current assets		452
Property, plant and equipment		(962)
Goodwill		(1,805)
Total assets acquired		(2,315)
Non-current deferred tax liabilities		(680)
Total liabilities assumed		(680)
Net assets acquired		$ (1,635)

Acquisitions - Summary of Fin56

Acquisitions - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Acquisition Date [Line Items]
Goodwill	$ 454,612	$ 443,529	$ 448,399
As Previously Reported [Member]
Acquisition Date [Line Items]
Goodwill		450,311
Precision Engineered Products Group [Member]
Acquisition Date [Line Items]
Goodwill		370,904	372,709
Current liabilities		21,354	21,354
Non-current deferred tax liabilities		94,755	95,435
Other non-current liabilities		2,208	$ 2,208
Precision Engineered Products Group [Member] | As Previously Reported [Member]
Acquisition Date [Line Items]
Goodwill		8,300
Current liabilities		200
Non-current deferred tax liabilities		7,900
Other non-current liabilities		$ 200

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017USD ($)Segment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment		3
Acquisition related costs		$ 344	$ 0	$ 11,682
Amortization of backlog intangibles		23,460	$ 25,998
NN Life Sciences Vandalia LLC [Member]
Segment Reporting Information [Line Items]
Acquisition related costs	$ 200	300
Business combinations revenue during period from acquired business		6,700
Business combinations net income (loss) during period from acquired business		(500)
Increase in cost of sales for inventory step-up		900
Precision Engineered Products Group [Member]
Segment Reporting Information [Line Items]
Business combinations revenue during period from acquired business				40,700
Business combinations net income (loss) during period from acquired business				(5,100)
Increase in cost of sales for inventory step-up				4,300
Amortization of backlog intangibles				5,200
Corporate and Consolidations [Member] | NN Life Sciences Vandalia LLC [Member]
Segment Reporting Information [Line Items]
Acquisition related costs		$ 300
Corporate and Consolidations [Member] | Precision Engineered Products Group [Member]
Segment Reporting Information [Line Items]
Non-recurring costs related to acquisition				$ 10,900

Segment Information - Segment I

Segment Information - Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 619,793	$ 584,954	$ 405,443
Depreciation and amortization	52,406	50,721	32,973
Income from operations	33,114	34,779	58
Interest expense	(52,085)	(62,870)	(29,582)
Other	(39,902)	(2,775)	(19,694)
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(58,873)	(30,866)	(49,218)
Share of net income from joint venture	5,211	5,938	5,001
Expenditures for long-lived assets	43,722	43,820	38,553
Total assets	1,475,003	1,358,274	1,388,337
Autocam Precision Components Group [Member]
Segment Reporting Information [Line Items]
Total assets	428,321	412,692	416,504
Autocam Precision Components Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	336,852	326,138	328,260
Depreciation and amortization	24,491	22,189	21,472
Income from operations	34,405	29,490	30,810
Share of net income from joint venture	5,211	5,938	5,001
Expenditures for long-lived assets	24,056	23,077	21,341
Precision Engineered Products Group [Member]
Segment Reporting Information [Line Items]
Total assets	738,766	720,362	747,804
Precision Engineered Products Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	282,941	258,816	77,183
Depreciation and amortization	26,745	28,105	11,282
Income from operations	36,711	33,900	(3,806)
Expenditures for long-lived assets	5,443	5,352	728
Corporate and Consolidations [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	1,170	427	219
Income from operations	(38,002)	(28,611)	(26,946)
Expenditures for long-lived assets	6,907	3,465	1,373
Total assets	$ 307,916	$ 225,220	$ 224,029

Segment Information - Summary o

Segment Information - Summary of Sales to External Customers and Long-Lived Tangible Assets by Geographical Region (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 619,793	$ 584,954	$ 405,443
Property, plant and equipment, net	259,280	230,093
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	437,838	407,917	275,152
Property, plant and equipment, net	173,269	155,784
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	40,334	36,481	32,736
Property, plant and equipment, net	25,288	21,069
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	62,657	64,177	46,092
Property, plant and equipment, net	26,078	19,936
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,176	1,921	861
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	40,937	45,863	27,023
Property, plant and equipment, net	7,544	5,821
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	35,845	28,595	23,558
Property, plant and equipment, net	27,101	27,483
Other Country [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6		21
All Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	181,955	177,037	$ 130,291
Property, plant and equipment, net	$ 86,011	$ 74,309

Accounts Receivable and Sales60

Accounts Receivable and Sales Concentrations - Summary of Accounts Receivables (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Trade	$ 110,165	$ 94,502
Less - allowance for doubtful accounts	1,719	1,069	$ 1,055	$ 362
Accounts receivable, net	$ 108,446	$ 93,433

Accounts Receivable and Sales61

Accounts Receivable and Sales Concentrations - Summary of Activity in the Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Balance at Beginning of Year	$ 1,069	$ 1,055	$ 362
Additions	699	142	745
Write- offs	(101)	(59)	(8)
Currency Impacts	103	(80)	(28)
Balance at End of Year	$ 1,719	$ 1,069	$ 1,055

Accounts Receivable and Sales62

Accounts Receivable and Sales Concentrations - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net sales	$ 619,793,000	$ 584,954,000	$ 405,443,000
Bosch [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net sales		$ 59.2	$ 73
Net Sales [Member] | Customer Concentration Risk [Member] | Bosch [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of consolidated sales		10.00%	18.00%
Accounts Receivable [Member] | Bosch [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable concentrations in excess	10.00%	10.00%

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 37,337	$ 36,080
Work in process	27,669	22,645
Finished goods	17,611	8,412
Inventories	$ 82,617	$ 67,137

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 371,649	$ 314,073
Less-accumulated depreciation	112,369	83,980
Property, plant and equipment, net	259,280	230,093
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	54,833	51,992
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	302,470	251,295
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 14,346	$ 10,786

Property, Plant and Equipment65

Property, Plant and Equipment - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)Business
Property, Plant and Equipment [Abstract]
Property, plant and equipment acquired	$ 14		$ 58.1
Number of businesses acquired | Business			2
Depreciation expense	$ 28.9	$ 24.7	$ 20.1

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Impairment of goodwill	$ 0	$ 0	$ 0
Autocam Precision Components Group [Member]
Goodwill [Line Items]
Accumulated Impairment of goodwill	4,300,000	4,300,000	4,300,000
Precision Engineered Products Group [Member]
Goodwill [Line Items]
Accumulated Impairment of goodwill	$ 11,700,000	$ 11,700,000	$ 11,700,000

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Beginning Balance	$ 443,529	$ 448,399
Currency impacts	1,631	(3,065)
Adjustments to goodwill		(1,805)
Goodwill acquired in acquisition	9,452
Ending Balance	454,612	443,529
Autocam Precision Components Group [Member]
Goodwill [Line Items]
Beginning Balance	73,263	73,864
Currency impacts	884	(601)
Ending Balance	74,147	73,263
Precision Engineered Products Group [Member]
Goodwill [Line Items]
Beginning Balance	370,266	374,535
Currency impacts	747	(2,464)
Adjustments to goodwill		(1,805)
Goodwill acquired in acquisition	9,452
Ending Balance	$ 380,465	$ 370,266

Intangible Assets, Net - Additi

Intangible Assets, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Oct. 02, 2017
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible asset	$ 0	$ 0
Intangible assets	6,900,000
NN Life Sciences Vandalia LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 6,900,000		$ 6,900,000
Estimated intangible assets useful life	15 years

Intangible Assets, Net - Summar

Intangible Assets, Net - Summary of Carrying Amount of Intangible Assets by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Beginning balance	$ 254,263	$ 280,217
Additions	6,900
Amortization	(23,460)	(25,998)
Currency impacts	(1)	44
Ending balance	237,702	254,263
Autocam Precision Components Group [Member]
Finite-Lived Intangible Assets [Line Items]
Beginning balance	42,928	46,417
Amortization	(3,481)	(3,533)
Currency impacts	(1)	44
Ending balance	39,446	42,928
Precision Engineered Products Group [Member]
Finite-Lived Intangible Assets [Line Items]
Beginning balance	211,335	233,800
Additions	6,900
Amortization	(19,979)	(22,465)
Ending balance	$ 198,256	$ 211,335

Intangible Assets, Net - Summ70

Intangible Assets, Net - Summary of Carrying Amount of Intangible Assets by Major Asset Class (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 301,230	$ 294,347
Accumulated Amortization	(63,528)	(40,084)
Net Carrying Value	237,702	254,263	$ 280,217
Customer Relationship [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	282,030	275,130
Accumulated Amortization	(52,408)	(30,137)
Net Carrying Value	229,622	244,993
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,200	19,217
Accumulated Amortization	(11,120)	(9,947)
Net Carrying Value	$ 8,080	$ 9,270
Minimum [Member] | Customer Relationship [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life in Years	12 years
Minimum [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life in Years	1 year
Maximum [Member] | Customer Relationship [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life in Years	15 years
Maximum [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life in Years	15 years

Intangible Assets, Net - Schedu

Intangible Assets, Net - Schedule of Finite Lived Intangible Assets Future Amortization Expense Table (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 23,878
2,019	23,810
2,020	23,670
2,021	23,678
2,022	$ 23,678

Investment in Joint Venture - A

Investment in Joint Venture - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Net sales	$ 619,793	$ 584,954	$ 405,443
Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Investment in joint venture	49.00%
Net sales	$ 200	100	200
Amount due from joint venture	$ 100	$ 100	$ 200
Wuxi Weifu Autocam Precision Machinery Company, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Investment in joint venture	49.00%

Investment in Joint Venture - S

Investment in Joint Venture - Summarized Activity Related to Investment in Joint Venture (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Beginning Balance	$ 36,008
Our share of cumulative earnings	5,211	$ 5,938	$ 5,001
Ending Balance	39,822	36,008
Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Beginning Balance	36,008
Our share of cumulative earnings	5,582
Dividends declared and paid by joint venture	(4,156)
Accretion of basis difference from purchase accounting	(371)
Foreign currency translation gain	2,759
Ending Balance	$ 39,822	$ 36,008

Investment in Joint Venture -74

Investment in Joint Venture - Summarized Balance Sheet Information of Unconsolidated Joint Venture (Detail) - Joint Venture [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Current assets	$ 47,600	$ 31,295
Non-current assets	24,763	22,522
Total assets	72,363	53,817
Current liabilities	26,165	13,549
Total liabilities	$ 26,165	$ 13,549

Investment in Joint Venture -75

Investment in Joint Venture - Summarized Income Statement Information of Unconsolidated Joint Venture (Detail) - Joint Venture [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Net sales	$ 74,805	$ 65,756	$ 55,962
Cost of sales	57,514	44,530	37,283
Income from operations	13,659	16,268	13,972
Net income	$ 11,442	$ 13,702	$ 11,525

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Federal corporate income tax rate		35.00%	34.00%	34.00%
Net tax benefit		$ 51,800,000
Effective tax rate on non deductible expense		134.20%	50.00%	40.30%
Deferred tax asset valuation allowance change in amount net		$ 3,500,000	$ 1,700,000
Deferred tax asset valuation allowance amount decrease			200,000
Valuation allowance on foreign tax credits				$ 2,400,000
Amount of unrecognized tax benefits would, if recognized, impact effective tax rate		5,700,000
Interest accrued on income taxes		1,000,000
Impact of these tax holidays decreased foreign taxes		$ 800,000	$ 700,000	$ 200,000
Benefit of the tax holidays on net income per share (diluted)		$ 0.03	$ 0.03	$ 0.01
Scenario, Plan [Member]
Income Taxes [Line Items]
Federal corporate income tax rate	21.00%
State Net Operating Loss Carryforwards [Member]
Income Taxes [Line Items]
Deferred tax asset valuation allowance amount increase		$ 2,300,000	$ 1,900,000
Foreign Net Operating Loss Carryforwards [Member]
Income Taxes [Line Items]
Deferred tax asset valuation allowance amount increase		1,200,000
Amount of unrecognized tax benefits would, if recognized, impact effective tax rate		5,200,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Interest accrued on income taxes		200,000
NOL carryovers		26,600,000
Tax credits in foreign jurisdictions		$ 18,000,000
Tax credits in foreign jurisdictions expiration beginning year		2,026
Foreign Tax Authority [Member] | Maximum [Member]
Income Taxes [Line Items]
Interest accrued on income taxes			100,000	$ 100,000
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Interest accrued on income taxes			$ 200,000	$ 300,000
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
NOL carryovers		$ 81,400,000
NOL carryovers expiration beginning year		2,030

Income Taxes - Loss from Contin

Income Taxes - Loss from Continuing Operations Before Benefit for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income / (Loss) from continuing operations before expense / (benefit) for income taxes and share of net income from joint venture
United States	$ (71,603)	$ (39,160)	$ (50,831)
Foreign	12,730	8,294	1,613
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	$ (58,873)	$ (30,866)	$ (49,218)

Income Taxes - Income Tax Benef

Income Taxes - Income Tax Benefit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
U.S. Federal	$ (47,916)	$ 2,595	$ (2,228)
State	(12,226)	679	189
Foreign	4,310	2,004	1,340
Total current expense	(55,832)	88	(699)
Deferred:
U.S. Federal	(25,017)	(9,679)	(16,007)
State	3,009	(6,406)	(1,913)
Deferred tax valuation allowance	710	1,882
Foreign	(1,896)	(1,323)	(1,223)
Total deferred expense (benefit)	(23,194)	(15,526)	(19,143)
Total expense (benefit)	$ (79,026)	$ (15,438)	$ (19,842)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Taxes Based on U.S. Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rate Rec: Percentages
Income taxes at the federal statutory rate	35.00%	34.00%	34.00%
Change in valuation allowance	(1.20%)	(6.10%)	0.00%
Foreign tax credits, exclusive of tax reform	(13.80%)	8.20%	2.70%
State taxes, net of federal taxes, exclusive of tax reform	9.10%	5.70%	3.60%
Non-U.S. earnings taxed at different rates	1.70%	4.80%	3.20%
Non-deductible mergers and acquisitions costs	0.00%	0.00%	(2.60%)
R&D Tax credit	0.30%	0.90%	1.30%
Change in uncertain tax positions	(0.40%)	3.20%	0.00%
Impact of Tax Reform
Toll Charge, net of foreign tax credit	(11.50%)	0.00%	0.00%
Remeasurement of deferred taxes pursuant to tax reform	65.60%	0.00%	0.00%
Tax Reform impact on divestiture of business segment	33.90%	0.00%	0.00%
Section 199/Domestic Production Deduction	0.80%	(0.00%)	(0.00%)
Divestiture of Business Segment, exclusive of tax reform	13.60%	0.00%	0.00%
Prior period revisions	0.50%	4.20%	1.80%
Foreign JV Net Income	0.00%	(4.10%)	(2.30%)
Other adjustments, net	0.70%	(0.80%)	(1.30%)
Total expense (benefit)	134.20%	50.00%	40.30%

Income Taxes - Principal Compon

Income Taxes - Principal Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred income tax liabilities:
Tax in excess of book depreciation	$ 34,143	$ 40,389	$ 39,447
Goodwill	58	23
Intangible assets	50,688	86,492	91,947
Other deferred tax liabilities	389	720	0
Total deferred income tax liabilities	85,278	127,624	131,394
Deferred income tax assets:
Goodwill	2,067	1,165	1,697
Inventories	2,248	740	4,370
Pension/Personnel accruals	1,596	1,395	2,669
Net operating loss carry forwards	6,950	10,297	6,289
Foreign tax credits		5,759	3,242
Guarantee claim deduction		414	1,141
Credit carry forwards	3,427	4,581	4,958
Accruals and reserves	2,015	1,151	0
Other deferred tax assets	3,019	10,193	2,084
Deferred income tax assets before Valuation Allowance	21,322	35,695	26,451
Valuation allowance on deferred tax assets	(7,608)	(4,090)	(2,376)
Total deferred income tax assets	13,714	31,605	24,075
Net deferred income tax liabilities	$ 71,564	$ 96,019	$ 107,319

Income Taxes - Principal Comp81

Income Taxes - Principal Components of Deferred Tax Assets and Liabilities (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
U.S. federal statutory rate		35.00%	34.00%	34.00%
Scenario, Plan [Member]
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
U.S. federal statutory rate	21.00%

Income Taxes - Summary of Activ

Income Taxes - Summary of Activity in Total Valuation Allowances (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Balance at Beginning of Year	$ 4,090	$ 2,376
Additions	3,518	1,882	$ 2,376
Recoveries		(168)
Reprice	0	0	0
Balance at End of Year	$ 7,608	$ 4,090	$ 2,376

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Beginning balance	$ 4,741	$ 5,724	$ 3,834
Additions for tax positions of prior years	1,404	179	2,516
Reductions for tax positions of prior years	(490)	(1,162)	(626)
Ending balance	$ 5,655	$ 4,741	$ 5,724

Debt - Summary of Debt (Detail)

Debt - Summary of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Aug. 17, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total	$ 828,565		$ 825,090
Less current maturities of long-term debt	17,283		12,751
Principal, net of current portion	811,282		812,339
Less unamortized debt issuance costs	20,477		26,626
Long-term debt, net of current portion	790,805		785,713
Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Senior debt			250,000
French Safeguard [Member]
Debt Instrument [Line Items]
French Safeguard Obligations	290		358
Brazilian [Member]
Debt Instrument [Line Items]
Line of credit	257		573
Chinese [Member]
Debt Instrument [Line Items]
Line of credit	2,768		2,619
Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Senior debt	534,250		543,563
Incremental Term Loan [Member]
Debt Instrument [Line Items]
Senior debt	$ 291,000
Senior Secured Revolving Facility [Member]
Debt Instrument [Line Items]
Line of credit		$ 33,200	$ 27,977

Debt - Summary of Debt (Parenth

Debt - Summary of Debt (Parenthetical) (Detail) - USD ($)	Nov. 24, 2017	Nov. 23, 2017	Dec. 31, 2017	Sep. 30, 2017	Apr. 03, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Interest rate	50.00%
Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Borrowings			$ 250,000,000
Interest rate			10.25%
Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Borrowings			$ 545,000,000
Interest rate			1.56%
Applicable margin			3.75%
LIBOR Period			1 month
Debt maturity date			Oct. 19, 2022
Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Applicable margin	3.75%	4.25%
Senior Secured Term Loan B [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate			0.75%
Senior Secured Term Loan B [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate						0.75%
Incremental Term Loan [Member]
Debt Instrument [Line Items]
Borrowings			$ 300,000,000		$ 300,000,000
Interest rate			1.56%
Applicable margin			3.25%
LIBOR Period			1 month
Debt maturity date			Apr. 3, 2021
Incremental Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Applicable margin	3.25%	3.75%
Senior Secured Revolving Facility [Member]
Debt Instrument [Line Items]
Debt maturity date			Oct. 19, 2020
Borrowings			$ 143,000,000	$ 143,000,000
Senior Secured Revolving Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate			1.56%
Applicable margin			3.50%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Nov. 24, 2017	Nov. 23, 2017	Apr. 03, 2017	Dec. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 17, 2017
Line of Credit Facility [Line Items]
Capitalized interest costs							$ 1,100,000	$ 1,600,000	$ 1,400,000
Loss on debt extinguishment				$ 2,400,000	$ 39,600,000		42,087,000	2,589,000	19,173,000
Cash paid for call premium							31,600,000
Write-off of unamortized debt issuance costs	$ 300,000						$ 10,502,000	2,589,000	$ 19,173,000
Debt issuance costs	$ 2,100,000
Interest rate	50.00%
French Safeguard [Member]
Line of Credit Facility [Line Items]
Interest rate				0.00%			0.00%
French Safeguard Obligations				$ 290,000			$ 290,000	358,000
Current maturities of French Safeguard obligations				100,000			100,000
Noncurrent maturities of French Safeguard obligations				200,000			200,000
Brazilian [Member]
Line of Credit Facility [Line Items]
Outstanding balance				257,000			257,000	573,000
Chinese [Member]
Line of Credit Facility [Line Items]
Outstanding balance				2,768,000			$ 2,768,000	2,619,000
Lines of credit annual interest rate							4.60%
Minimum [Member] | French Safeguard [Member]
Line of Credit Facility [Line Items]
Creditor's claim period							10 years
Minimum [Member] | Brazilian [Member]
Line of Credit Facility [Line Items]
Lines of credit annual interest rate							2.50%
Maximum [Member] | Brazilian [Member]
Line of Credit Facility [Line Items]
Lines of credit annual interest rate							6.00%
Incremental Term Loan [Member]
Line of Credit Facility [Line Items]
Debt instrument face amount			$ 300,000,000	300,000,000			$ 300,000,000
Debt maturity date						Apr. 3, 2021
Debt instrument periodic payment			3,000,000
Debt instrument frequency of periodic payment						Quarterly
Basis spread on variable rate							3.25%
Incremental Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.25%	3.75%
Senior Secured Revolving Facility [Member]
Line of Credit Facility [Line Items]
Loss on debt extinguishment			2,500,000
Write-off of unamortized debt issuance costs			800,000
Borrowings				143,000,000		$ 143,000,000	$ 143,000,000
Senior secured revolving credit facility current borrowing capacity			100,000,000
Debt issuance costs			6,500,000
Direct reduction to carrying amount of debt			4,000,000
Outstanding balance								$ 27,977,000		$ 33,200,000
Commitment fee rate							0.50%
Senior Secured Revolving Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate							3.50%
Senior Secured Term Loan B [Member]
Line of Credit Facility [Line Items]
Debt instrument face amount				$ 545,000,000			$ 545,000,000
Basis spread on variable rate							3.75%
Senior Secured Term Loan B [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate				0.75%			0.75%
Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.75%	4.25%
Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate								0.75%
Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate								1.00%
Senior Notes [Member]
Line of Credit Facility [Line Items]
Outstanding amount of notes redeemed			281,600,000
Loss on debt extinguishment			36,300,000
Cash paid for call premium			31,600,000
Write-off of unamortized debt issuance costs			$ 4,700,000

Debt - Aggregate Maturities of

Debt - Aggregate Maturities of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
2,018	$ 17,283
2,019	17,968
2,020	17,752
2,021	260,750
2,022	514,812
Thereafter	0
Total outstanding principal	$ 828,565	$ 825,090

Restructuring and Integration -

Restructuring and Integration - Summary of Restructuring and Integration Charges and Reserve Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Severance and other costs	$ 17	$ 1,687	$ 1,522
Site closure and other associated costs	369	3,971	3,727
Total	386	5,658	5,249
Reserve beginning balance	2,625	2,732
Charges	386	5,658	5,249
Non-cash Adjustments	(164)	(2,420)	(2,290)
Cash Reductions	(1,748)	(3,345)	(227)
Reserve ending balance	1,099	2,625	2,732
Severance and Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reserve beginning balance	1,000	887
Charges	17	1,687	1,522
Non-cash Adjustments	(164)	(278)	(408)
Cash Reductions	(853)	(1,296)	(227)
Reserve ending balance		1,000	887
Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reserve beginning balance	1,625	1,845
Charges	369	3,971	3,727
Non-cash Adjustments		(2,142)	(1,882)
Cash Reductions	(895)	(2,049)
Reserve ending balance	1,099	1,625	1,845
Autocam Precision Components [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other costs	17	851	672
Site closure and other associated costs	369	3,488	1,962
Total	$ 386	4,339	2,634
Precision Engineered Products Group [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other costs		836	850
Site closure and other associated costs		483
Total		$ 1,319	850
Corporate and Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Site closure and other associated costs			1,765
Total			$ 1,765

Restructuring and Integration89

Restructuring and Integration - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense	$ 386	$ 5,658	$ 5,249
Severance and restructuring cost	386	5,658	5,249
Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost	369	3,971	3,727
Severance and Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost	17	1,687	1,522
Autocam Precision Components Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense	400
Corporate and Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense			1,765
Wheeling Plant [Member] | Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected payment on reserve balance within next twelve months	1,000
Remaining reserve balance to be paid in 2019	$ 100
Wheeling Plant [Member] | Precision Engineered Products Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense		1,300
Severance and restructuring cost			900
Wheeling Plant [Member] | Autocam Precision Components Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense		4,300	2,600
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		3,200	900
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Severance and Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		800	700
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		$ 300
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Inventory Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost			1,000
Wheeling Plant [Member] | Corporate and Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost			$ 1,800

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Contingencies And Commitments [Line Items]
Rent expenses	$ 7,600,000	$ 7,200,000	$ 4,700,000
Amount accrued for estimation of loss	0	$ 0
Minimum [Member]
Contingencies And Commitments [Line Items]
Possible loss estimated	0
Maximum [Member]
Contingencies And Commitments [Line Items]
Possible loss estimated	$ 6,000,000

Commitments and Contingencies91

Commitments and Contingencies - Schedule by Year of Future Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
Minimum Rental Commitments, 2018	$ 8,616
Minimum Rental Commitments, 2019	9,576
Minimum Rental Commitments, 2020	8,670
Minimum Rental Commitments, 2021	7,255
Minimum Rental Commitments, 2022	6,937
Minimum Rental Commitments, Thereafter	36,075
Total minimum payments	$ 77,129

Equity Offering - Additional In

Equity Offering - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity Offering [Abstract]
Number of shares of common stock sold	7,590,000
Public offering price per share	$ 24
Net proceeds to NN from the offering	$ 173,100
Repayment of term loan and ABL facilities	$ 148,700	$ 314,313	$ 55,000	$ 401,438

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	Aug. 17, 2017USD ($)Membershares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized to issued as options | shares		1,900,000	1,900,000
Share-based compensation expense | $			$ 5,496,000	$ 3,935,000	$ 4,039,000
Tax benefit for share-based compensation cost | $			1,600,000	$ 600,000	$ 600,000
Unrecognized compensation costs related to unvested awards | $		$ 4,600,000	$ 4,600,000
Unrecognized compensation costs, period for recognition			2 years
Term life of options			10 years
Stock awards granted vesting period	2 years		3 years
Number of options granted | shares			126,000	167,000	54,100
Weighted average grant date fair value of the options granted | $ / shares			$ 11.84	$ 5.02	$ 12.61
Cash proceeds from the exercise of options | $			$ 3,110,000	$ 2,832,000	$ 2,041,000
Total intrinsic value of options exercised | $			3,784,000	2,900,000	2,600,000
Tax benefit recognized from stock option exercises | $			200,000		100,000
Options awards vested | shares	58,094
Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $			$ 1,000,000	$ 500,000	$ 700,000
Discontinued Operations, Disposed of by Sale [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental compensation costs | $	$ 800,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted vesting period			3 years
Stock units issued | shares			85,000	152,510	114,475
Fair value assumptions, exercise price | $ / shares		$ 24.29	$ 24.29
Options awards vested | shares			2,100,000	2,600,000	1,200,000
Restricted stock awards accelerated | shares	25,564
TSR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units issued | shares			46,000
Options awards vested | shares			1,200,000
Percentage of shares issuable based on threshold performance			50.00%	50.00%	50.00%
Percentage of shares issuable based on target performance			100.00%	100.00%	100.00%
Percentage of shares issuable based on maximum performance			150.00%	150.00%	150.00%
ROIC Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units issued | shares			53,000
Options awards vested | shares			900,000
Percentage of shares issuable based on threshold performance			35.00%	35.00%	35.00%
Percentage of shares issuable based on target performance			100.00%	100.00%	100.00%
Percentage of shares issuable based on maximum performance			150.00%	150.00%	150.00%
ROIC Awards [Member] | Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $		$ 400,000
Officers and Key Employees [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted vesting period			3 years
Non-executive Directors [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted vesting period			1 year
Executive Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of members who got vesting of share-based awards | Member	19
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit recognized from stock option exercises | $				$ 100,000

Share-Based Compensation - Comp

Share-Based Compensation - Components of Share-Based Compensation Expense by Type of Award (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 5,496	$ 3,935	$ 4,039
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	1,078	687	984
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock	1,968	2,061	2,623
Performance Based Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 2,450	$ 1,187	$ 432

Share-Based Compensation - Weig

Share-Based Compensation - Weighted Average Assumptions Relevant to Determining the Fair Value at the Dates of Grant and Stock Option Modification (Detail) - Stock Option [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	6 years	6 years	6 years
Risk free interest rate	2.03%	1.43%	1.43%
Dividend yield	1.16%	2.48%	1.11%
Expected volatility	56.56%	59.23%	59.22%
Expected forfeiture rate	3.00%	3.00%	3.00%

Share-Based Compensation - Reco

Share-Based Compensation - Reconciliation of Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of options, Outstanding, Beginning Balance	897,000
Number of Options, Granted	126,000	167,000	54,100
Number of Options, Exercised	(263,000)
Number of Options, Forfeited or expired	(14,000)
Number of Options, Outstanding, Ending Balance	746,000	897,000
Number of Options, Options Exercisable	573,000
Weighted-Average Exercise Price, Outstanding, Beginning Balance	$ 12.22
Weighted-Average Exercise Price, Granted	24.20
Weighted-Average Exercise Price, Exercised	11.84
Weighted-Average Exercise Price, Forfeited or expired	14.34
Weighted-Average Exercise Price, Outstanding, Ending Balance	14.33	$ 12.22
Weighted-Average Exercise Price, Options exercisable	$ 12.75
Weighted-Average Remaining Contractual Term, Outstanding	6 years 2 months 12 days
Weighted- Average Remaining Contractual Term, Options exercisable	5 years 6 months
Aggregate Intrinsic Value, Exercised	$ 3,784	$ 2,900	$ 2,600
Aggregate Intrinsic Value, Outstanding	9,900
Aggregate Intrinsic Value, Options exercisable	$ 8,506

Share-Based Compensation - Re97

Share-Based Compensation - Reconciliation of Restricted Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Restricted Shares, Beginning Balance	202,000
Nonvested Restricted Shares, Granted	85,000	152,510	114,475
Nonvested Restricted Shares, Vested	(135,000)
Nonvested Restricted Shares, Ending balance	152,000	202,000
Weighted Average Grant-Date Fair Value, Beginning Balance	$ 15.01
Weighted Average Grant-Date Fair Value, Granted	24.29
Weighted Average Grant-Date Fair Value, Vested	15.63
Weighted Average Grant-Date Fair Value, Ending balance	$ 19.21	$ 15.01
TSR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Restricted Shares, Beginning Balance	124,000
Nonvested Restricted Shares, Granted	46,000
Nonvested Restricted Shares, Vested	(32,000)
Nonvested Restricted Shares, Forfeited	(8,000)
Nonvested Restricted Shares, Ending balance	130,000	124,000
Weighted Average Grant-Date Fair Value, Beginning Balance	$ 14.33
Weighted Average Grant-Date Fair Value, Granted	29.84
Weighted Average Grant-Date Fair Value, Vested	28.61
Weighted Average Grant-Date Fair Value, Forfeited	19.19
Weighted Average Grant-Date Fair Value, Ending balance	$ 16.60	$ 14.33
ROIC Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Restricted Shares, Beginning Balance	124,000
Shares, Change in Vesting Estimate	16,000
Nonvested Restricted Shares, Granted	53,000
Nonvested Restricted Shares, Vested	(48,000)
Nonvested Restricted Shares, Forfeited	(9,000)
Nonvested Restricted Shares, Ending balance	136,000	124,000
Weighted Average Grant-Date Fair Value, Beginning Balance	$ 14.87
Weighted Average Grant-Date Fair Value, Change in Vesting Estimate	25.16
Weighted Average Grant-Date Fair Value, Granted	24.20
Weighted Average Grant-Date Fair Value, Vested	25.16
Weighted Average Grant-Date Fair Value, Forfeited	18.03
Weighted Average Grant-Date Fair Value, Ending balance	$ 16.27	$ 14.87

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of Performance Based Awards Goals with Respect to TSR and ROIC (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
TSR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold Performance of Shares, percentage	50.00%	50.00%	50.00%
Target Performance of Shares, percentage	100.00%	100.00%	100.00%
Maximum Performance of Shares, percentage	150.00%	150.00%	150.00%
Threshold Performance, percentage	35.00%	35.00%	35.00%
Target Performance, percentage	50.00%	50.00%	50.00%
Maximum Performance, percentage	75.00%	75.00%	75.00%
ROIC Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold Performance of Shares, percentage	35.00%	35.00%	35.00%
Target Performance of Shares, percentage	100.00%	100.00%	100.00%
Maximum Performance of Shares, percentage	150.00%	150.00%	150.00%
Threshold Performance, percentage	15.00%	15.50%	11.00%
Target Performance, percentage	17.50%	18.00%	12.50%
Maximum Performance, percentage	20.00%	20.50%	14.00%

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Number of Awards Granted and Grand Date Fair Value (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets Valuation Allowance [Line Items]
Grant Date Fair Value	$ 24.20
TSR Awards [Member]
Deferred Tax Assets Valuation Allowance [Line Items]
Number of awards granted in fair values, Shares	46	101	36
Grant Date Fair Value	$ 29.84	$ 9.38	$ 28.61
ROIC Awards [Member]
Deferred Tax Assets Valuation Allowance [Line Items]
Number of awards granted in fair values, Shares	53	101	36
Grant Date Fair Value	$ 24.20	$ 11.31	$ 25.16

Accumulated Other Comprehens100

Accumulated Other Comprehensive Income - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) due to foreign currency translations	$ 22,100	$ 10,600	$ 24,900
Change in fair value of interest rate hedge		$ 1,910	$ (1,637)
Reclassification adjustment for discontinued operations	9,243
Precision Bearing Components Group [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment for discontinued operations	$ 9,200

Net Income (Loss) Per Share - S

Net Income (Loss) Per Share - Summary of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 25,364	$ (9,490)	$ (24,375)
Income from discontinued operations, net of tax	137,688	16,153	17,889
Net income (loss)	$ 163,052	$ 6,663	$ (6,486)
Weighted average shares outstanding	27,433	27,016	21,181
Effect of dilutive stock options	322
Diluted shares outstanding	27,755	27,016	21,181
Basic income (loss) from continuing operations per share	$ 0.92	$ (0.35)	$ (1.15)
Basic income from discontinued operations per share	5.02	0.60	0.84
Basic net income (loss) per share	5.94	0.25	(0.31)
Diluted income (loss) from continuing operations per share	0.91	(0.35)	(1.15)
Diluted income from discontinued operations per share	4.96	0.60	0.84
Diluted net income (loss) per share	$ 5.87	$ 0.25	$ (0.31)

Net Income (Loss) Per Share - A

Net Income (Loss) Per Share - Additional Information (Detail) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Income Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share minimum price range	$ 4.42	$ 4.42	$ 4.42
Anti-dilutive securities excluded from computation of earnings per share maximum price range one	$ 25.16	$ 25.16	$ 25.16
Stock Option [Member]
Net Income Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of diluted earnings per share from continuing operation	0.4	0.8	1

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Oct. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Nov. 24, 2017
Derivatives, Fair Value [Line Items]
Fair value of fixed-rate debt		$ 0
Amount of interest rate swap			$ 150,000,000
Locked interest rate			6.466%
Derivative maturity date			Dec. 31, 2018
Interest rate				50.00%
Cash payments related to the interest rate swap	$ 1,300,000		$ 300,000
Interest rate swaps outstanding		0
Net hedging losses on the interest rate swaps		1,400,000	1,400,000
Derivative in Net liability position		150,000,000
Interest rate swap settlements in derivative loss (gain)			$ (609,000)
Accumulated Other Comprehensive Income (loss) [Member]
Derivatives, Fair Value [Line Items]
Gain or loss related to interest rate swaps		$ 0
Minimum [Member] | Senior Secured Term Loan B [Member]
Derivatives, Fair Value [Line Items]
Interest rate		0.75%
Minimum [Member] | Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivatives, Fair Value [Line Items]
Interest rate			0.75%
Maximum [Member] | Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivatives, Fair Value [Line Items]
Interest rate			1.00%

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value Estimates for Financial and Nonfinancial Assets and Liabilities Measured at Fair Value on Nonrecurring basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Oct. 02, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Vandalia property, plant and equipment	$ 14,000			$ 58,100
Vandalia intangible assets subject to amortization	6,900
Vandalia goodwill	454,612		$ 443,529	$ 448,399
NN Life Sciences Vandalia LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Vandalia current assets	10,166	$ 10,166
Vandalia property, plant and equipment	13,981	13,981
Vandalia intangible assets subject to amortization	6,900	6,900
Vandalia other non-current assets	29	29
Vandalia goodwill	9,452	9,452
Vandalia non-current liabilities	(1,794)	(1,794)
Net assets acquired	38,734	$ 38,734
Significant Unobservable Inputs (Level 3) [Member] | NN Life Sciences Vandalia LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Vandalia current assets	10,166
Vandalia property, plant and equipment	13,981
Vandalia intangible assets subject to amortization	6,900
Vandalia other non-current assets	29
Vandalia goodwill	9,452
Vandalia non-current liabilities	(1,794)
Net assets acquired	$ 38,734

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities Valued on Recurring Basis (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Derivatives, Fair Value [Line Items]
Derivative asset - current	$ 69
Derivative asset - noncurrent	6
Derivative liability - current	(1,903)
Derivative liability - noncurrent	(1,028)
Derivative assets and liabilities, Total	(2,856)
Significant Other Observable Inputs (Level 2) [Member]
Derivatives, Fair Value [Line Items]
Derivative asset - current	69
Derivative asset - noncurrent	6
Derivative liability - current	(1,903)
Derivative liability - noncurrent	(1,028)
Derivative assets and liabilities, Total	$ (2,856)

Quarterly Results of Operati106

Quarterly Results of Operations (Unaudited) - Summary of Unaudited Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Line Items]
Net sales									$ 619,793	$ 584,954	$ 405,443
Cost of sales (exclusive of depreciation and amortization)									459,080	428,843	320,632
Income (loss) from continuing operations									25,364	(9,490)	(24,375)
Income from discontinued operations, net of tax									137,688	16,153	17,889
Comprehensive income (loss)									$ 175,903	$ (2,050)	$ (33,026)
Basic income (loss) from continuing operations per share									$ 0.92	$ (0.35)	$ (1.15)
Basic net income (loss) per share									5.94	0.25	(0.31)
Diluted income (loss) from continuing operations per share									0.91	(0.35)	(1.15)
Diluted net income (loss) per share									$ 5.87	$ 0.25	$ (0.31)
As Previously Reported [Member]
Selected Quarterly Financial Information [Line Items]
Net sales		$ 148,156	$ 225,875	$ 226,314	$ 202,029	$ 204,961	$ 214,272	$ 212,226
Cost of sales (exclusive of depreciation and amortization)		110,836	166,040	166,954	151,936	152,538	156,794	159,754		$ 621,022
Income (loss) from continuing operations		(2,930)	(21,529)	7,407	3,063	4,147	2,031	(1,299)		7,942	$ (7,431)
Income from discontinued operations, net of tax		135,825
Net income (loss)		132,895	(21,529)	7,407	3,063	4,147	2,031	(1,299)
Comprehensive income (loss)		$ 129,735	$ (12,289)	$ 12,113	$ (10,212)	$ 8,740	$ (973)	$ 4,418		$ 1,973	$ (31,951)
Basic income (loss) from continuing operations per share		$ (0.11)	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.08	$ (0.05)
Basic net income (loss) per share		4.82	(0.78)	0.27	0.11	0.15	0.08	(0.05)		$ 0.29	$ (0.35)
Diluted income (loss) from continuing operations per share		(0.11)	(0.78)	0.27	0.11	0.15	0.07	(0.05)
Diluted net income (loss) per share		$ 4.82	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.07	$ (0.05)		$ 0.29	$ (0.35)
Adjustment [Member]
Selected Quarterly Financial Information [Line Items]
Cost of sales (exclusive of depreciation and amortization)		$ 436		$ 485	$ 466	$ 91	$ 114	$ 144		$ 815
Income (loss) from continuing operations		(550)	$ 391	4	(1,512)	419	(172)	(14)		(1,279)	$ 945
Income from discontinued operations, net of tax		(6,384)
Net income (loss)		(6,934)	391	4	(1,512)	419	(172)	(14)
Comprehensive income (loss)		$ (6,606)	$ 662	$ 403	$ (90)	$ (2,938)	$ (1,879)	$ 884		$ (4,023)	$ (1,075)
Basic income (loss) from continuing operations per share		$ (0.02)	$ 0.01	$ 0	$ (0.06)	$ 0.02	$ (0.01)	$ 0
Basic net income (loss) per share		(0.25)	0.01	0	(0.06)	0.02	(0.01)	0		$ (0.05)	$ 0.04
Diluted income (loss) from continuing operations per share		(0.02)	0.01	0	(0.06)	0.02	(0.01)	0
Diluted net income (loss) per share		$ (0.25)	$ 0.01	$ 0	$ (0.06)	$ 0.02	$ (0.01)	$ 0		$ (0.05)	$ 0.04
Discontinued Operations [Member]
Selected Quarterly Financial Information [Line Items]
Net sales			$ (67,928)	$ (68,759)	$ (60,385)	$ (58,247)	$ (65,157)	$ (64,745)
Cost of sales (exclusive of depreciation and amortization)			(51,526)	(52,959)	(47,597)	(45,353)	(49,580)	(50,464)		$ (192,994)
Income (loss) from continuing operations			(5,236)	(5,518)	(3,737)	(3,622)	(4,326)	(4,468)		(16,153)	$ (17,889)
Income from discontinued operations, net of tax			$ 5,236	$ 5,518	$ 3,737	$ 3,622	$ 4,326	$ 4,468
Basic income (loss) from continuing operations per share			$ (0.19)	$ (0.20)	$ (0.14)	$ (0.13)	$ (0.16)	$ (0.17)
Diluted income (loss) from continuing operations per share			$ (0.19)	$ (0.20)	$ (0.14)	$ (0.13)	$ (0.16)	$ (0.17)
Continuing Operations As Revised [Member]
Selected Quarterly Financial Information [Line Items]
Net sales	$ 156,135	$ 148,156	$ 157,947	$ 157,555	$ 141,644	$ 146,714	$ 149,115	$ 147,481
Cost of sales (exclusive of depreciation and amortization)	118,814	111,272	114,514	114,480	104,805	107,276	107,328	109,434		428,843
Income (loss) from continuing operations	53,325	(3,480)	(26,374)	1,893	(2,186)	944	(2,467)	(5,781)		(9,490)	(24,375)
Income from discontinued operations, net of tax	(2,507)	129,441	5,236	5,518	3,737	3,622	4,326	44,687
Net income (loss)	50,818	125,961	(21,138)	7,411	1,551	4,566	1,859	(1,313)
Comprehensive income (loss)	$ 51,885	$ 123,129	$ (11,627)	$ 12,516	$ (10,302)	$ 5,802	$ (2,852)	$ 5,302		$ (2,050)	$ (33,026)
Basic income (loss) from continuing operations per share	$ 1.93	$ (0.13)	$ (0.96)	$ 0.07	$ (0.08)	$ 0.03	$ (0.09)	$ (0.22)
Basic net income (loss) per share	1.84	4.57	(0.77)	0.27	0.06	0.17	0.07	(0.05)		$ 0.25	$ (0.31)
Diluted income (loss) from continuing operations per share	1.91	(0.13)	(0.96)	0.07	(0.08)	0.03	(0.09)	(0.22)
Diluted net income (loss) per share	$ 1.82	$ 4.57	$ (0.77)	$ 0.27	$ 0.06	$ 0.17	$ 0.07	$ (0.05)		$ 0.25	$ (0.31)

Quarterly Results of Operati107

Quarterly Results of Operations (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 02, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Line Items]
Merger and acquisition related costs before tax					$ 344	$ 0	$ 11,682
Loss on extinguishment of debt and write-off of unamortized debt issuance costs		$ 2,400		$ 39,600	42,087	$ 2,589	$ 19,173
NN Life Sciences Vandalia LLC [Member]
Selected Quarterly Financial Information [Line Items]
Merger and acquisition related costs before tax		200			300
Merger and acquisition related costs after tax		100
Net loss attributable to Vandalia acquisition		$ 500
Working capital adjustment and revisions	$ 300
Precision Bearing Components Group [Member]
Selected Quarterly Financial Information [Line Items]
Merger and acquisition related costs after tax			$ 129,400
Working capital adjustment and revisions			$ 1,500
Discontinued operations final gain					$ 127,700

Prior Periods Financial Stateme

Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements and Revision on Consolidated Statements of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	Nov. 24, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Changes And Error Corrections [Line Items]
Cost of sales (exclusive of depreciation and amortization)										$ 459,080	$ 428,843	$ 320,632
Selling, general and administrative expense										74,112	64,144	34,873
Depreciation and amortization										52,406	50,721	32,973
Other operating expense (income)										(351)	(809)	24
Income (loss) from operations										33,114	34,779	58
Loss on extinguishment of debt and write-off of unamortized debt issuance costs	$ 300									10,502	2,589	19,173
Other (income) expense, net										2,084	2,871	(521)
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture										(58,873)	(30,866)	(49,218)
Provision (benefit) for income taxes										(79,026)	(15,438)	(19,842)
Income (loss) from continuing operations										25,364	(9,490)	(24,375)
Net income (loss)										163,052	6,663	(6,486)
Other comprehensive income (loss):
Change in fair value of interest rate swap											1,910	(1,637)
Foreign currency translation loss										22,094	(10,623)	(24,903)
Other comprehensive loss										12,851	(8,713)	(26,540)
Comprehensive income (loss)										$ 175,903	$ (2,050)	$ (33,026)
Basic net income (loss) per share										$ 5.94	$ 0.25	$ (0.31)
Diluted net income (loss) per share										$ 5.87	$ 0.25	$ (0.31)
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Cost of sales (exclusive of depreciation and amortization)			$ 110,836	$ 166,040	$ 166,954	$ 151,936	$ 152,538	$ 156,794	$ 159,754		$ 621,022
Selling, general and administrative expense											80,266	$ 51,745
Depreciation and amortization											62,488	44,482
Other operating expense (income)											288	(687)
Income (loss) from operations											59,400	26,797
Loss on extinguishment of debt and write-off of unamortized debt issuance costs											3,089	18,673
Other (income) expense, net											(2,591)
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture											(7,309)	(22,950)
Provision (benefit) for income taxes											(9,313)	(10,518)
Income (loss) from continuing operations			(2,930)	(21,529)	7,407	3,063	4,147	2,031	(1,299)		7,942	(7,431)
Net income (loss)											7,942	(7,431)
Other comprehensive income (loss):
Change in fair value of interest rate swap											3,015	(2,584)
Foreign currency translation loss											(8,984)	(21,936)
Other comprehensive loss											(5,969)	(24,520)
Comprehensive income (loss)			$ 129,735	$ (12,289)	$ 12,113	$ (10,212)	$ 8,740	$ (973)	$ 4,418		$ 1,973	$ (31,951)
Basic net income (loss) per share			$ 4.82	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.08	$ (0.05)		$ 0.29	$ (0.35)
Diluted net income (loss) per share			$ 4.82	$ (0.78)	$ 0.27	$ 0.11	$ 0.15	$ 0.07	$ (0.05)		$ 0.29	$ (0.35)
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Cost of sales (exclusive of depreciation and amortization)			$ 436		$ 485	$ 466	$ 91	$ 114	$ 144		$ 815
Selling, general and administrative expense											870	$ 596
Depreciation and amortization											85	(13)
Other operating expense (income)											548	663
Income (loss) from operations											(2,318)	(1,246)
Loss on extinguishment of debt and write-off of unamortized debt issuance costs											(500)	500
Other (income) expense, net											(783)
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture											(1,035)	(1,746)
Provision (benefit) for income taxes											244	(2,691)
Income (loss) from continuing operations			(550)	$ 391	4	(1,512)	419	(172)	(14)		(1,279)	945
Net income (loss)											(1,279)	945
Other comprehensive income (loss):
Change in fair value of interest rate swap											(1,105)	947
Foreign currency translation loss											(1,639)	(2,967)
Other comprehensive loss											(2,744)	(2,020)
Comprehensive income (loss)			$ (6,606)	$ 662	$ 403	$ (90)	$ (2,938)	$ (1,879)	$ 884		$ (4,023)	$ (1,075)
Basic net income (loss) per share			$ (0.25)	$ 0.01	$ 0	$ (0.06)	$ 0.02	$ (0.01)	$ 0		$ (0.05)	$ 0.04
Diluted net income (loss) per share			$ (0.25)	$ 0.01	$ 0	$ (0.06)	$ 0.02	$ (0.01)	$ 0		$ (0.05)	$ 0.04
Discontinued Operations [Member]
Accounting Changes And Error Corrections [Line Items]
Cost of sales (exclusive of depreciation and amortization)				$ (51,526)	$ (52,959)	$ (47,597)	$ (45,353)	$ (49,580)	$ (50,464)		$ (192,994)
Selling, general and administrative expense											(16,992)	$ (17,468)
Depreciation and amortization											(11,852)	(11,496)
Other operating expense (income)											(27)
Income (loss) from operations											(22,303)	(25,493)
Other (income) expense, net											503
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture											(22,522)	(24,522)
Provision (benefit) for income taxes											(6,369)	(6,633)
Income (loss) from continuing operations				(5,236)	(5,518)	(3,737)	(3,622)	(4,326)	(4,468)		(16,153)	(17,889)
Continuing Operations As Revised [Member]
Accounting Changes And Error Corrections [Line Items]
Cost of sales (exclusive of depreciation and amortization)		$ 118,814	$ 111,272	114,514	114,480	104,805	107,276	107,328	109,434		428,843
Selling, general and administrative expense											64,144	34,873
Depreciation and amortization											50,721	32,973
Other operating expense (income)											809	(24)
Income (loss) from operations											34,779	58
Loss on extinguishment of debt and write-off of unamortized debt issuance costs											2,589	19,173
Other (income) expense, net											(2,871)
Income (loss) from continuing operations before provision (benefit) for income taxes and share of net income from joint venture											(30,866)	(49,218)
Provision (benefit) for income taxes											(15,438)	(19,842)
Income (loss) from continuing operations		53,325	(3,480)	(26,374)	1,893	(2,186)	944	(2,467)	(5,781)		(9,490)	(24,375)
Net income (loss)											6,663	(6,486)
Other comprehensive income (loss):
Change in fair value of interest rate swap											1,910	(1,637)
Foreign currency translation loss											(10,623)	(24,903)
Other comprehensive loss											(8,713)	(26,540)
Comprehensive income (loss)		$ 51,885	$ 123,129	$ (11,627)	$ 12,516	$ (10,302)	$ 5,802	$ (2,852)	$ 5,302		$ (2,050)	$ (33,026)
Basic net income (loss) per share		$ 1.84	$ 4.57	$ (0.77)	$ 0.27	$ 0.06	$ 0.17	$ 0.07	$ (0.05)		$ 0.25	$ (0.31)
Diluted net income (loss) per share		$ 1.82	$ 4.57	$ (0.77)	$ 0.27	$ 0.06	$ 0.17	$ 0.07	$ (0.05)		$ 0.25	$ (0.31)

Prior Periods Financial Stat109

Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements and Revision on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Changes And Error Corrections [Line Items]
Income tax receivable	$ 43,253	$ 1,741
Other current assets	18,518	7,029
Total current assets	477,280	282,328
Property, plant and equipment, net	259,280	230,093
Goodwill	454,612	443,529	$ 448,399
Investment in joint venture	39,822	36,008
Other non-current assets	6,307	8,113
Total assets	1,475,003	1,358,274	1,388,337
Accounts payable	52,990	44,690
Accrued salaries, wages and benefits	21,145	17,226
Other current liabilities	17,003	20,325
Total current liabilities	108,421	140,241
Deferred tax liabilities	71,564	96,018
Other non-current liabilities	12,516	14,300
Total liabilities	988,899	1,048,883
Retained earnings	211,080	55,175	56,096
Accumulated other comprehensive loss	(17,745)	(30,596)	(21,883)
Total stockholders' equity	486,104	309,391	312,431	$ 172,989
Total liabilities and stockholders' equity	$ 1,475,003	1,358,274
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Other current assets		11,752
Total current assets		280,555
Property, plant and equipment, net		322,953
Goodwill		450,311
Investment in joint venture		40,694
Other non-current assets		9,892
Total assets		1,360,386
Accounts payable		75,719
Accrued salaries, wages and benefits		24,996
Income tax payable		2,125
Other current liabilities		23,025
Total current liabilities		138,616
Deferred tax liabilities		99,591
Other non-current liabilities		21,267
Total liabilities		1,045,187
Retained earnings		55,509	55,151
Accumulated other comprehensive loss		(25,122)	(19,153)
Total stockholders' equity		315,199	313,881
Total liabilities and stockholders' equity		1,360,386
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Income tax receivable		1,041
Other current assets		32
Total current assets		1,073
Property, plant and equipment, net		(487)
Goodwill		2,127
Investment in joint venture		(4,686)
Other non-current assets		(839)
Total assets		(2,812)
Accounts payable		(15)
Accrued salaries, wages and benefits		1,464
Other current liabilities		(524)
Total current liabilities		925
Deferred tax liabilities		600
Other non-current liabilities		1,471
Total liabilities		2,996
Retained earnings		(334)	945
Accumulated other comprehensive loss		(5,474)	(2,730)
Total stockholders' equity		(5,808)	$ (1,450)
Total liabilities and stockholders' equity		(2,812)
Discontinued Operations [Member]
Accounting Changes And Error Corrections [Line Items]
Income tax receivable		700
Other current assets		(4,755)
Total current assets		700
Property, plant and equipment, net		(92,373)
Goodwill		(8,909)
Other non-current assets		(940)
Total assets		700
Accounts payable		(31,014)
Accrued salaries, wages and benefits		(9,234)
Income tax payable		(2,125)
Other current liabilities		(2,176)
Total current liabilities		700
Deferred tax liabilities		(4,173)
Other non-current liabilities		(8,438)
Total liabilities		700
Total liabilities and stockholders' equity		700
Continuing Operations As Revised [Member]
Accounting Changes And Error Corrections [Line Items]
Income tax receivable		1,741
Other current assets		7,029
Total current assets		282,328
Property, plant and equipment, net		230,093
Goodwill		443,529
Investment in joint venture		36,008
Other non-current assets		8,113
Total assets		1,358,274
Accounts payable		44,690
Accrued salaries, wages and benefits		17,226
Other current liabilities		20,325
Total current liabilities		140,241
Deferred tax liabilities		96,018
Other non-current liabilities		14,300
Total liabilities		1,048,883
Retained earnings		55,175
Accumulated other comprehensive loss		(30,596)
Total stockholders' equity		309,391
Total liabilities and stockholders' equity		$ 1,358,274

Prior Periods Financial Stat110

Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements on Consolidated Statements of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Changes And Error Corrections [Line Items]
Net income (loss)	$ 163,052	$ 6,663	$ (6,486)
Retained earnings	211,080	55,175	56,096
Change in fair value of interest rate swap		1,910	(1,637)
Foreign currency translation loss	22,094	(10,623)	(24,903)
Accumulated other comprehensive loss	(17,745)	(30,596)	(21,883)
Additional paid-in capital	292,494	284,508	277,917
Total stockholders' equity	$ 486,104	309,391	312,431	$ 172,989
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)		7,942	(7,431)
Retained earnings		55,509	55,151
Change in fair value of interest rate swap		3,015	(2,584)
Foreign currency translation loss		(8,984)	(21,936)
Accumulated other comprehensive loss		(25,122)	(19,153)
Additional paid-in capital			277,582
Total stockholders' equity		315,199	313,881
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)		(1,279)	945
Retained earnings		(334)	945
Change in fair value of interest rate swap		(1,105)	947
Foreign currency translation loss		(1,639)	(2,967)
Accumulated other comprehensive loss		(5,474)	(2,730)
Additional paid-in capital			335
Total stockholders' equity		$ (5,808)	$ (1,450)

Prior Periods Financial Stat111

Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements on Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Changes And Error Corrections [Line Items]
Share-based compensation expense	$ 5,496	$ 3,935	$ 4,039
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Share-based compensation expense		4,270	3,704
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Share-based compensation expense		$ (335)	$ 335

Prior Periods Financial Stat112

Prior Periods Financial Statement Revision - Schedule of Correction of Misstatements on Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands		Nov. 24, 2017	Jul. 01, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Changes And Error Corrections [Line Items]
Net income (loss)				$ 163,052	$ 6,663	$ (6,486)
Adjustments to reconcile net income to net cash provided by (used by) operating activities:
Depreciation and amortization				52,406	50,721	32,973
Write-off of debt issuance costs		$ 300		10,502	2,589	19,173
Compensation expense from issuance of share-based awards				4,730	3,935	4,039
Deferred income taxes				(23,195)	(15,526)	(19,143)
Other				(545)	(122)
Changes in operating assets and liabilities:
Accounts receivable				(11,374)	(18,505)	(2,492)
Other current assets				(1,389)	(522)	(79)
Other non-current assets				(3)	2,381	(559)
Income taxes payable (receivable)				(124,389)	(217)	2,631
Other liabilities				316	9,164	3,441
Accounts payable				4,118	7,633	(7,963)
Net cash provided by (used by) operating activities				(59,818)	69,352	33,328
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations				282,471	(41,224)	(665,838)
Cash flows from investing activities
Proceeds from insurance claim				545	122
Net cash provided by (used by) investing activities				282,471	(41,224)	(665,838)
Cash flows from financing activities
Proceeds from long-term debt				322,000	44,000	885,000
Repayment of long-term debt			$ (148,700)	(314,313)	(55,000)	(401,438)
Proceeds from (repayment of) short-term debt, net				(4,211)	(456)	(84)
Proceeds from shares issued						173,052
Proceeds from issuance of stock and exercise of stock options				3,110	2,832	2,041
Shares withheld to satisfy income tax witholding				(617)	(173)	(231)
Net cash provided by (used by) financing activities				(14,251)	(24,481)	611,620
Effect of exchange rate changes on cash flows				1,639	(4,329)	(1,340)
Net change in cash and cash equivalents				210,041	(682)	(22,230)
Cash and cash equivalents at beginning of period (1)	[1]			14,405	15,087	37,317
Cash and cash equivalents at end of period (1)	[1]			224,446	14,405	15,087
ASU 2016-09 [Member]
Changes in operating assets and liabilities:
Accounts receivable						(1,149)
Income taxes payable (receivable)					284	3,171
Other liabilities					390	(1,251)
Net cash provided by (used by) operating activities					674	771
Cash flows from financing activities
Shares withheld to satisfy income tax witholding					(173)	(231)
Net cash provided by (used by) financing activities					(173)	(231)
Effect of exchange rate changes on cash flows					2	2
Net change in cash and cash equivalents					503	538
Cash and cash equivalents at beginning of period (1)				503	538
Cash and cash equivalents at end of period (1)					503	538
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)					7,942	(7,431)
Adjustments to reconcile net income to net cash provided by (used by) operating activities:
Depreciation and amortization					62,488	44,482
Write-off of debt issuance costs					3,089	18,673
Compensation expense from issuance of share-based awards					4,270	3,704
Deferred income taxes					(10,430)	(16,878)
Changes in operating assets and liabilities:
Accounts receivable						(1,343)
Other current assets					(269)	(944)
Other non-current assets					1,833	(1,501)
Other liabilities					1,946	4,999
Accounts payable						(6,748)
Net cash provided by (used by) operating activities					69,603	33,310
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations					(41,346)	(665,838)
Cash flows from investing activities
Net cash provided by (used by) investing activities					(41,346)	(665,838)
Cash flows from financing activities
Repayment of long-term debt					(30,000)
Proceeds from (repayment of) short-term debt, net					18,544
Proceeds from shares issued					2,832
Net cash provided by (used by) financing activities					24,308	611,851
Effect of exchange rate changes on cash flows					(4,331)	(1,553)
Net change in cash and cash equivalents					(682)	(22,230)
Cash and cash equivalents at beginning of period (1)				14,405	15,087	37,317
Cash and cash equivalents at end of period (1)					14,405	15,087
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)					(1,279)	945
Adjustments to reconcile net income to net cash provided by (used by) operating activities:
Depreciation and amortization					85	(13)
Write-off of debt issuance costs					(500)	500
Compensation expense from issuance of share-based awards					(335)	335
Deferred income taxes					(5,096)	(2,265)
Other					(122)
Changes in operating assets and liabilities:
Other current assets					(253)	865
Other non-current assets					548	942
Income taxes payable (receivable)					(217)	(540)
Other liabilities					7,045	(307)
Accounts payable						(1,251)
Net cash provided by (used by) operating activities					(625)	(753)
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations					122
Cash flows from investing activities
Proceeds from insurance claim					122
Net cash provided by (used by) investing activities					122
Cash flows from financing activities
Proceeds from long-term debt					44,000
Repayment of long-term debt					(25,000)
Proceeds from (repayment of) short-term debt, net					(19,000)
Proceeds from shares issued					(2,832)
Proceeds from issuance of stock and exercise of stock options					2,832
Effect of exchange rate changes on cash flows						215
Net change in cash and cash equivalents					(503)	(538)
Cash and cash equivalents at beginning of period (1)				$ (503)	(538)
Cash and cash equivalents at end of period (1)					$ (503)	$ (538)
[1]	(1) Cash and cash equivalents includes $8.1 million, $3.7 million, and $9.1 million of cash and cash equivalents that was included in current assets of discontinued operations as of December 31, 2016, 2015, and 2014, respectively.

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Bridgemedica, LLC [Member] - USD ($) $ in Millions	Feb. 22, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Date of acquisition		Feb. 22, 2018
Subsequent Event [Member]
Subsequent Event [Line Items]
Acquisition percentage	100.00%
Cash payment to acquire business	$ 15