CTS (CTS) 10-Q 26 Apr 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 23, 2018
Document and Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	CTS
Entity Registrant Name	CTS CORP
Entity Central Index Key	26,058
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		33,018,206

Consolidated Statements of Earn

Consolidated Statements of Earnings - Unaudited - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 113,530	$ 100,154
Cost of goods sold	75,097	65,930
Gross Margin	38,433	34,224
Selling, general and administrative expenses	17,372	15,248
Research and development expenses	6,507	6,003
Restructuring charges	1,195	777
Operating earnings	13,359	12,196
Other income (expense):
Interest expense	(541)	(684)
Interest income	482	253
Other income, net	2,004	460
Total other income	1,945	29
Earnings before income taxes	15,304	12,225
Income tax expense	3,756	3,741
Net earnings	$ 11,548	$ 8,484
Earnings per share:
Basic (in dollars per share)	$ 0.35	$ 0.26
Diluted (in dollars per share)	$ 0.34	$ 0.25
Basic weighted - average common shares outstanding (in shares):	32,975	32,802
Effect of dilutive securities (in shares)	540	560
Diluted weighted - average common shares outstanding (in shares)	33,515	33,362
Cash dividends declared per share (in dollars per share)	$ 0.04	$ 0.04

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Earnings - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 11,548	$ 8,484
Other comprehensive income:
Changes in fair market value of derivatives, net of tax	807	760
Changes in unrealized pension cost, net of tax	1,107	816
Cumulative translation adjustment, net of tax	243	88
Other comprehensive income	2,157	1,664
Comprehensive earnings	$ 13,705	$ 10,148

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - Unaudited - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 121,383	$ 113,572
Accounts receivable, net	69,948	70,584
Inventories, net	37,941	36,596
Other current assets	13,266	12,857
Total current assets	242,538	233,609
Property, plant and equipment, net	90,685	88,247
Other Assets
Prepaid pension asset	58,494	57,050
Goodwill	71,057	71,057
Other intangible assets, net	65,246	66,943
Deferred income taxes	18,428	20,694
Other	2,244	2,096
Total other assets	215,469	217,840
Total Assets	548,692	539,696
Current Liabilities
Accounts payable	51,937	49,201
Accrued payroll and benefits	8,497	11,867
Accrued liabilities	42,027	41,344
Total current liabilities	102,461	102,412
Long-term debt	74,000	76,300
Long-term pension obligations	7,148	7,201
Deferred Tax Liabilities, Net, Noncurrent	3,398	3,802
Other long-term obligations	5,953	6,176
Total Liabilities	192,960	195,891
Shareholders’ Equity
Common stock	305,722	304,777
Additional contributed capital	39,681	41,084
Retained earnings	430,388	420,160
Accumulated other comprehensive loss	(76,803)	(78,960)
Total shareholders’ equity before treasury stock	698,988	687,061
Treasury stock	(343,256)	(343,256)
Total shareholders’ equity	355,732	343,805
Total Liabilities and Shareholders’ Equity	$ 548,692	$ 539,696

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 11,548	$ 8,484
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	5,483	4,708
Pension and Other Postretirement Expense (Income)	107	(417)
Stock-based compensation	923	880
Deferred income taxes	1,289	2,313
Gain (Loss) on Disposition of Assets	(1)	(2)
Gain on foreign currency hedges, net of cash	(56)	0
Changes in assets and liabilities:
Accounts receivable	1,435	7
Inventories	(788)	(2,076)
Other assets	147	(16)
Accounts payable	2,855	942
Accrued payroll and benefits	(3,596)	(5,169)
Accrued expenses	(69)	(2,280)
Income taxes payable	1,179	248
Other liabilities	(224)	2,232
Pension and other post-retirement plans	(80)	(79)
Net cash provided by operating activities	20,154	9,779
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(6,912)	(3,806)
Proceeds from sale of assets	0	1
Net cash used in investing activities	(6,912)	(3,805)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of long-term debt	(334,100)	(373,000)
Proceeds from borrowings of long-term debt	331,800	377,900
Dividends paid	(1,318)	(1,310)
Net cash (used in) provided by financing activities	(5,041)	2,024
Payments Related to Tax Withholding for Share-based Compensation	(1,423)	(1,566)
Effect of exchange rate changes on cash and cash equivalents	(390)	16
Net increase in cash and cash equivalents	7,811	8,014
Cash and cash equivalents at beginning of period	113,572	113,805
Cash and cash equivalents at end of period	121,383	121,819
Supplemental cash flow information:
Cash paid for interest	486	529
Cash paid for income taxes, net	$ 809	$ 1,386

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements have been prepared by CTS Corporation (“CTS” "we", "our", "us" or the "Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been omitted pursuant to such rules and regulations. The unaudited condensed consolidated financial statements should be read in conjunction with the financial statements, notes thereto, and other information included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2017 . The accompanying unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments (consisting of normal recurring items) necessary for a fair statement, in all material respects, of the financial position and results of operations for the periods presented. The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ materially from those estimates. The results of operations for the interim periods are not necessarily indicative of the results for the entire year. Change in Accounting Principle In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)". The guidance in this ASU affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). This guidance requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. Beginning in January 2018, CTS adopted the provisions of Topic 606 under the modified retrospective method, which requires a cumulative effect adjustment to the opening balance of retained earnings on the date of adoption. This approach was applied to contracts not completed as of December 31, 2017. At date of adoption, there was no significant change to our past revenue recognition practices and therefore no adjustment to the opening balance of retained earnings was required. Subsequent Events We have evaluated subsequent events and transactions for potential recognition or disclosure in the financial statements through the date the consolidated financial statements are issued.

Revenue Recognition (Notes)

Revenue Recognition (Notes)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition The core principle of Topic 606 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five-step process to achieve that core principle: • Identify the contract(s) with a customer • Identify the performance obligations • Determine the transaction price • Allocate the transaction price • Recognize revenue when the performance obligations are met We recognize revenue when the performance obligations specified in our contracts have been satisfied, after considering the impact of variable consideration and other factors that may affect the transaction price. Our contracts normally contain a single performance obligation that is fulfilled on the date of delivery based on shipping terms stipulated in the contract. We usually expect payment within 30 to 90 days from the shipping date, depending on our terms with the customer. None of our contracts as of March 31, 2018 , contained a significant financing component. Differences between the amount of revenue recognized and the amount invoiced, collected from, or paid to our customers are recognized as contract assets or liabilities. Contract assets will be reviewed for impairment when events or circumstances indicate that they may not be recoverable. To the extent the transaction price includes variable consideration, we estimate the amount of variable consideration that should be included in the transaction price utilizing the most likely amount method based on an analysis of historical experience and current facts and circumstances, which requires significant judgment. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Contract Assets and Liabilities Contract assets and liabilities included in our Condensed Consolidated Balance Sheets are as follows: As of March 31, December 31, 2018 2017 Contract Assets Prepaid rebates included in Other current assets $ 41 $ 52 Prepaid rebates included in Other assets 465 465 Total Contract Assets $ 506 $ 517 Contract Liabilities Customer discounts and price concessions included in Accrued liabilities $ (1,972 ) $ (1,133 ) Customer rights of return included in Accrued liabilities (249 ) (462 ) Total Contract Liabilities $ (2,221 ) $ (1,595 ) During the three months period ended March 31, 2018 , we recognized revenues of $ 131 that were included in contract liabilities at the beginning of the period. The increase in contract liabilities during the three months ended March 31, 2018 is primarily due to net increases in estimated future discounts and price concessions, offset by net settlements of products sold with rights of return. Disaggregated Revenue The following table presents revenues disaggregated by the major markets we serve: Three Months Ended March 31, 2018 March 31, 2017 Aero & Defense $ 5,103 $ 4,657 Industrial 20,356 17,112 Medical 9,241 6,814 Telecom & IT 4,525 5,178 Transportation 74,305 66,393 Total $ 113,530 $ 100,154

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Accounts Receivable	Accounts Receivable The components of accounts receivable are as follows: As of March 31, December 31, 2018 2017 Accounts receivable, gross $ 70,432 $ 70,941 Less: Allowance for doubtful accounts (484 ) (357 ) Accounts receivable, net $ 69,948 $ 70,584

Inventories

Inventories	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consist of the following: As of March 31, December 31, 2018 2017 Finished goods $ 10,678 $ 9,203 Work-in-process 12,089 12,065 Raw materials 21,294 21,150 Less: Inventory reserves (6,120 ) (5,822 ) Inventories, net $ 37,941 $ 36,596

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment is comprised of the following: As of March 31, December 31, 2018 2017 Land $ 1,137 $ 1,130 Buildings and improvements 64,457 64,201 Machinery and equipment 229,041 223,650 Less: Accumulated depreciation (203,950 ) (200,734 ) Property, plant and equipment, net $ 90,685 $ 88,247 Depreciation expense for the three months ended March 31, 2018 $ 3,763 Depreciation expense for the three months ended March 31, 2017 $ 3,172

Retirement Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans Pension Plans Net pension expense (income) for our domestic and foreign plans was as follows: Three Months Ended March 31, March 31, 2018 2017 Net pension expense (income) $ 79 $ (433 ) The components of net pension expense (income) for our domestic and foreign plans include the following: Domestic Pension Plans Foreign Pension Plans Three Months Ended Three Months Ended March 31, March 31, March 31, March 31, 2018 2017 2018 2017 Service cost $ — $ — $ 11 $ 12 Interest cost 1,781 2,068 11 8 Expected return on plan assets (1) (3,225 ) (4,061 ) (7 ) (5 ) Amortization of loss 1,466 1,446 42 38 Other cost due to retirement — 61 — — Expense (income), net $ 22 $ (486 ) $ 57 $ 53 (1) Expected return on plan assets is net of expected investment expenses and certain administrative expenses. Other Post-retirement Benefit Plan Net post-retirement expense for our other post-retirement plan includes the following components: Three Months Ended March 31, March 31, 2018 2017 Service cost $ 1 $ 1 Interest cost 39 40 Amortization of gain (12 ) (25 ) Post-retirement expense $ 28 $ 16

Other Intangible Assets

Other Intangible Assets	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Other Intangible Assets	Other Intangible Assets Intangible assets consist of the following components: As of March 31, 2018 Gross Accumulated Net Amount Customer lists/relationships $ 64,323 $ (34,536 ) $ 29,787 Patents 10,319 (10,319 ) — Technology and other intangibles 44,460 (11,201 ) 33,259 In process research and development 2,200 — 2,200 Other intangible assets, net $ 121,302 $ (56,056 ) $ 65,246 Amortization expense for the three months ended March 31, 2018 $ 1,720 As of December 31, 2017 Gross Accumulated Net Amount Customer lists/relationships $ 64,323 $ (33,685 ) $ 30,638 Patents 10,319 (10,319 ) — Technology and other intangibles 44,460 (10,355 ) 34,105 In process research and development 2,200 — 2,200 Other intangible assets, net $ 121,302 $ (54,359 ) $ 66,943 Amortization expense for the three months ended March 31, 2017 $ 1,536 Remaining amortization expense for other intangible assets as of March 31, 2018 is as follows: Amortization 2018 $ 5,066 2019 6,754 2020 6,624 2021 6,467 2022 6,230 Thereafter 34,105 Total amortization expense $ 65,246

Costs Associated with Exit and

Costs Associated with Exit and Restructuring Activities	3 Months Ended
	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Costs Associated with Exit and Restructuring Activities	Costs Associated with Exit and Restructuring Activities Costs associated with exit and restructuring activities are recorded in the Condensed Consolidated Statement of Earnings as a separate component of Operating earnings. Total restructuring charges, all related to the June 2016 Plan described below, were as follows: Three Months Ended March 31, 2018 March 31, 2017 Restructuring charges $ 1,195 $ 777 In June 2016, we announced plans to restructure operations by phasing out production at our Elkhart facility by the end of 2018 and transitioning it into a research and development center supporting our global operations ("June 2016 Plan"). Additional organizational changes will also occur in various other locations. During the third quarter of 2017, we revised the June 2016 Plan. The amendment added an additional $1,100 in planned costs related to the relocation of our corporate headquarters in Lisle, IL and our plant in Bolingbrook, IL, both of which will be consolidated into a single facility. The amendment does not impact any additional employees. The total cost of the plan is expected to be approximately $13,400 and will impact approximately 230 employees. The total restructuring liability related to severance and other one-time benefit arrangements under the June 2016 Plan was $1,279 at March 31, 2018 , and $ 1,460 at December 31, 2017 . Additional costs related to line movements, equipment charges, and other costs will be expensed as incurred. The following table displays the planned restructuring charges associated with the June 2016 Plan as well as a summary of the actual costs incurred through March 31, 2018 : Actual costs Planned incurred through June 2016 Plan Costs March 31, 2018 Workforce reduction $ 3,075 $ 3,089 Building and equipment relocation 9,025 4,548 Other charges 1,300 745 Total restructuring charges $ 13,400 $ 8,382 In April 2014, we announced plans to restructure our operations and consolidate our Canadian operations into other existing facilities as part of our overall plan to simplify its business model and rationalize our global footprint (“April 2014 Plan”). These restructuring actions, which were completed during 2015, impacted approximately 120 positions. The remaining restructuring liability related to the April 2014 Plan was $445 at March 31, 2018 , and $ 453 at December 31, 2017 . The following table displays the restructuring liability activity for all plans for the three months ended March 31, 2018 : Combined Plans Restructuring liability at January 1, 2018 $ 1,913 Restructuring charges 1,195 Cost paid (1,376 ) Other activity (1) (8 ) Restructuring liability at March 31, 2018 $ 1,724 (1) Other activity includes the effects of currency translation and other charges that do not flow through restructuring expense.

Accrued Liabilities

Accrued Liabilities	3 Months Ended
	Mar. 31, 2018
Other Liabilities Disclosure [Abstract]
Accrued Liabilities	Accrued Liabilities The components of accrued liabilities are as follows: As of March 31, December 31, 2018 2017 Accrued product related costs $ 5,008 $ 5,297 Accrued income taxes 6,770 5,475 Accrued property and other taxes 2,404 997 Accrued professional fees 2,730 2,228 Contract liabilities 2,221 1,595 Dividends payable 1,321 1,318 Remediation reserves 15,119 17,067 Other accrued liabilities 6,454 7,367 Total accrued liabilities $ 42,027 $ 41,344

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Certain processes in the manufacture of our current and past products create by-products classified as hazardous waste. We have been notified by the U.S. Environmental Protection Agency, state environmental agencies, and in some cases, groups of potentially responsible parties, that we may be potentially liable for environmental contamination at several sites currently and formerly owned or operated by us. Some sites, such as Asheville, North Carolina and Mountain View, California, are designated National Priorities List sites under the U.S. Environmental Protection Agency’s Superfund program. We reserve for probable remediation activities and for claims and proceedings against us with respect to other environmental matters. We record reserves on an undiscounted basis. In the opinion of management, based upon presently available information relating to such matters, adequate provision for probable and estimable costs have been recorded. We do not have any known environmental obligations where a loss is probable or reasonably possible of occurring for which we do not have a reserve, nor do we have any amounts for which we have not reserved because the amount of the loss cannot be reasonably estimated. Due to the inherent nature of environmental obligations, we cannot provide assurance that our ultimate environmental liability will not materially exceed the amount of its current reserve. Our reserve and disclosures will be adjusted accordingly if additional information becomes available in the future. A roll forward of remediation reserves included in accrued liabilities on the balance sheet is comprised of the following: As of March 31, 2018 December 31, 2017 Balance at beginning of period $ 17,067 $ 18,176 Remediation expense 85 307 Net remediation payments (2,033 ) (1,416 ) Balance at end of the period $ 15,119 $ 17,067 Unrelated to the environmental claims described above, certain other claims are pending against us with respect to matters arising in the ordinary conduct of our business. Although the ultimate outcome of any potential litigation resulting from these claims cannot be predicted with certainty, and some may be disposed of unfavorably to us, we believe that adequate provision for anticipated costs have been established based upon all presently available information. Except as noted herein, we do not believe we have any pending loss contingencies that are probable or reasonably possible of having a material impact on our consolidated financial position, results of operations, or cash flows.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt Long-term debt was comprised of the following: As of March 31, December 31, 2018 2017 Total credit facility $ 300,000 $ 300,000 Balance outstanding $ 74,000 $ 76,300 Standby letters of credit $ 2,065 $ 2,065 Amount available $ 223,935 $ 221,635 Weighted-average interest rate 2.90 % 2.30 % Commitment fee percentage per annum 0.25 % 0.25 % On August 10, 2015, we entered into a new five -year credit agreement (“Revolving Credit Facility”) with a group of banks in order to support our financing needs. The Revolving Credit Facility originally provided for a credit line of $200,000 . On May 23, 2016, we requested and received a $100,000 increase in the aggregate revolving credit commitments under the existing credit agreement, which increased the credit line from $200,000 to $300,000 . The Revolving Credit Facility includes a swing line sublimit of $15,000 and a letter of credit sublimit of $10,000 . Borrowings under the Revolving Credit Facility bear interest, at our option, at the base rate plus the applicable margin for base rate loans or LIBOR plus the applicable margin for LIBOR loans. We also pay a quarterly commitment fee on the unused portion of the Revolving Credit Facility. The commitment fee ranges from 0.20% to 0.40% based on the our total leverage ratio. The Revolving Credit Facility requires, among other things, that we comply with a maximum total leverage ratio and a minimum fixed charge coverage ratio. Failure to comply with these covenants could reduce the borrowing availability under the Revolving Credit Facility. We were in compliance with all debt covenants at March 31, 2018 . The Revolving Credit Facility requires that we deliver quarterly financial statements, annual financial statements, auditor certifications, and compliance certificates within a specified number of days after the end of a quarter and year. Additionally, the Revolving Credit Facility contains restrictions limiting our ability to: dispose of assets; incur certain additional debt; repay other debt or amend subordinated debt instruments; create liens on assets; make investments, loans or advances; make acquisitions or engage in mergers or consolidations; engage in certain transactions with our subsidiaries and affiliates; and make stock repurchases and dividend payments. Interest rates on the Revolving Credit Facility fluctuate based upon the London Interbank Offered Rate and the Company’s quarterly total leverage ratio. We have debt issuance costs related to our long-term debt that are being amortized using the straight-line method over the life of the debt. These costs are included in interest expense in our Condensed Consolidated Statement of Earnings. Amortization expense was approximately $46 for both the three months ended March 31, 2018 and March 31, 2017 .

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Our earnings and cash flows are subject to fluctuations due to changes in foreign currency exchange rates and interest rates. We selectively use derivative financial instruments including foreign currency forward contracts and interest rate swaps to manage our exposure to these risks. The use of derivative financial instruments exposes the Company to credit risk, which relates to the risk of nonperformance by a counterparty to the derivative contracts. We manage our credit risk by entering into derivative contracts with only highly rated financial institutions and by using netting agreements. Foreign Currency Hedges In January of 2016, we began using forward contracts to mitigate currency risk related to a portion of our forecasted foreign currency revenues and costs. The currency forward contracts are designed as cash flow hedges and are recorded in the Condensed Consolidated Balance Sheets at fair value. At least quarterly, we assess the effectiveness of these hedging relationships based on the total change in their fair value using regression analysis. The effective portion of derivative gains and losses are recorded in accumulated other comprehensive income (loss) until the hedged transaction affects earnings upon settlement, at which time they are reclassified to cost of goods sold or net sales. Ineffectiveness is recorded in other income (expense) in our Condensed Consolidated Statement of Earnings. If it becomes probable that an anticipated transaction that is hedged will not occur by the end of the originally specified time period, we reclassify the gains or losses related to that hedge from accumulated other comprehensive income (loss) to other income (expense). We continue to monitor the Company’s overall currency exposure and may elect to add cash flow hedges in the future. At March 31, 2018 , we had a net unrealized gain of $ 37 in accumulated other comprehensive loss, of which $ 34 is expected to be reclassified to income within the next 12 months. At March 31, 2017 we had a net unrealized gain of $ 486 in accumulated other comprehensive income (loss). The notional amount of foreign currency forward contracts outstanding was $25.2 million at March 31, 2018 . Interest Rate Swaps We use interest rate swaps to convert the revolving credit facility’s variable rate of interest into a fixed rate. In the second quarter of 2012, CTS entered into four separate interest rate swap agreements to fix interest rates on $50,000 of long-term debt for the periods January 2013 to January 2017. In the third quarter of 2012, we entered into four additional interest rate swap agreements to fix interest rates on $25,000 of long-term debt for the periods January 2013 to January 2017. In the third quarter of 2016, we entered into three additional interest rate swap agreements to fix interest rates on $50,000 of long-term debt for the periods August 2017 to August 2020. The difference to be paid or received under the terms of the swap agreements will be recognized as an adjustment to interest expense when settled. These swaps are treated as cash flow hedges and consequently, the changes in fair value were recorded in other comprehensive income (loss). The estimated net amount of the existing gains or losses that are reported in accumulated other comprehensive income (loss) that is expected to be reclassified into earnings within the next twelve months is approximately $424 . The location and fair values of derivative instruments designated as hedging instruments in the Condensed Consolidated Balance Sheets as of March 31, 2018 , are shown in the following table: As of March 31, December 31, 2018 2017 Interest rate swaps reported in Other current assets $ 424 $ 278 Interest rate swaps reported in Other assets $ 870 $ 693 Foreign currency hedges reported in Other current assets $ 34 $ — Foreign currency hedges reported in Accrued liabilities $ — $ (742 ) The Company has elected to net its foreign currency derivative assets and liabilities in the balance sheet in accordance with ASC 210-20 (Balance Sheet, Offsetting). On a gross basis, there were foreign currency derivative assets of $351 and foreign currency derivative liabilities of $317 . The effect of derivative instruments on the Condensed Consolidated Statements of Earnings is as follows: Three Months Ended March 31, March 31, 2018 2017 Foreign Exchange Contracts: Loss recognized in Net sales $ (58 ) $ (2 ) Gain (loss) recognized in Cost of goods sold 108 (144 ) Loss recognized in Selling, general and administrative expense (1 ) (3 ) Loss recognized in Other income (1 ) (8 ) Interest Rate Swaps: Benefit recorded in Interest expense $ 65 $ — Total gain (loss) $ 113 $ (157 )

Accumulated Other Comprehensive

Accumulated Other Comprehensive (Loss) Income	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income Shareholders’ equity includes certain items classified as accumulated other comprehensive (loss) income (“AOCI”) in the Condensed Consolidated Balance Sheets, including: Unrealized gains (losses) on hedges relate to interest rate swaps to convert the revolving credit facility's variable rate of interest into a fixed rate and foreign currency forward contracts used to hedge our exposure to changes in exchange rates affecting certain revenues and costs denominated in foreign currencies. These hedges are designated as cash flow hedges, and we have deferred income statement recognition of gains and losses until the hedged transactions occur, at which time amounts are reclassified into earnings. Further information related to CTS’ derivative financial instruments is included in Note 12 - Derivative Financial Instruments and Note 16 – Fair Value Measurements. Unrealized gains (losses) on pension obligations are deferred from income statement recognition until the gains or losses are realized. Amounts reclassified to income from AOCI are included in net periodic pension income / (expense). Further information related to our pension obligations is included in Note 6 – Retirement Plans. Cumulative translation adjustments relate to our non-U.S. subsidiary companies that have designated a functional currency other than the U.S. dollar. We are required to translate the subsidiary functional currency financial statements to dollars using a combination of historical, period-end, and average foreign exchange rates. This combination of rates creates the foreign currency translation adjustment component of other comprehensive (loss) income. Changes in exchange rates between the functional currency and the currency in which a transaction is denominated are foreign exchange transaction gains or losses. Transaction gains for the three months ended March 31, 2018 and March 31, 2017 were $1,996 and $395 , respectively, which have been included in other income (expense) in the Condensed Consolidated Statement of Earnings. The components of accumulated other comprehensive (loss) income for the three months ended March 31, 2018 , are as follows: Gain (Loss) As of Gain (Loss) Reclassified As of December 31, Recognized from AOCI March 31, 2017 in OCI to Income 2018 Changes in fair market value of hedges: Gross $ 289 $ 1,157 $ (114 ) $ 1,332 Income tax (benefit) expense (105 ) (261 ) 25 (341 ) Net 184 896 (89 ) 991 Changes in unrealized pension cost: Gross (130,096 ) — 1,424 (128,672 ) Income tax expense (benefit) 52,837 — (317 ) 52,520 Net (77,259 ) — 1,107 (76,152 ) Cumulative translation adjustment: Gross (1,985 ) 238 — (1,747 ) Income tax expense 100 5 — 105 Net (1,885 ) 243 — (1,642 ) Total accumulated other comprehensive (loss) income $ (78,960 ) $ 1,139 $ 1,018 $ (76,803 ) The components of accumulated other comprehensive (loss) income for the three months ended March 31, 2017 , are as follows: Gain (Loss) As of Gain (Loss) Reclassified As of December 31, Recognized from AOCI March 31, 2016 in OCI to Income 2017 Changes in fair market value of hedges: Gross $ 116 $ 1,042 $ 150 $ 1,308 Income tax (benefit) expense (42 ) (378 ) (54 ) (474 ) Net 74 664 96 834 Changes in unrealized pension cost: Gross (151,618 ) — 1,296 (150,322 ) Income tax expense (benefit) 60,672 — (480 ) 60,192 Net (90,946 ) — 816 (90,130 ) Cumulative translation adjustment: Gross (2,414 ) 86 — (2,328 ) Income tax expense 92 2 — 94 Net (2,322 ) 88 — (2,234 ) Total accumulated other comprehensive (loss) income $ (93,194 ) $ 752 $ 912 $ (91,530 )

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Share count and par value data related to shareholders’ equity are as follows: As of March 31, December 31, 2018 2017 Preferred Stock Par value per share No par value No par value Shares authorized 25,000,000 25,000,000 Shares outstanding — — Common Stock Par value per share No par value No par value Shares authorized 75,000,000 75,000,000 Shares issued 56,711,792 56,632,488 Shares outstanding 33,017,770 32,938,466 Treasury stock Shares held 23,694,022 23,694,022 No common stock repurchases were made during the three months ended March 31, 2018 . Through March 31, 2018 , we had purchased an aggregate of $7,446 under a previously board-authorized share repurchase plan allowing for up to $25,000 in stock repurchases. Approximately $17,554 is available for future purchases. A roll-forward of common shares outstanding is as follows: Three Months Ended March 31, March 31, 2018 2017 Balance at the beginning of the year 32,938,466 32,762,494 Repurchases — — Shares issued upon exercise of stock options — — Restricted share issuances 79,304 88,225 Balance at the end of the period 33,017,770 32,850,719 Certain potentially dilutive restricted stock units are excluded from diluted earning per share because they are anti-dilutive. The number of awards that were anti-dilutive at March 31, 2018 and March 31, 2017 were 78,317 and 88,592 , respectively.

Equity-Based Compensation

Equity-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity-Based Compensation	-Based Compensation At March 31, 2018 , we had four active stock-based compensation plans: the Nonemployee Directors’ Stock Retirement Plan (“Directors’ Plan”), the 2004 Omnibus Long-Term Incentive Plan (“2004 Plan”), the 2009 Omnibus Equity and Performance Incentive Plan (“2009 Plan”), and the 2014 Performance & Incentive Plan (“2014 Plan”). Future grants can only be made under the 2014 Plan. The following table summarizes the compensation expense included in selling, general and administrative expenses in the Condensed Consolidated Statements of Earnings related to stock-based compensation plans: Three Months Ended March 31, March 31, 2018 2017 Service-Based RSUs $ 455 $ 550 Performance-Based RSUs 510 384 Cash-settled RSUs (42 ) (54 ) Total $ 923 $ 880 Income tax benefit 209 331 Net $ 714 $ 549 The following table summarizes the unrecognized compensation expense related to non-vested RSUs by type and the weighted-average period in which the expense is to be recognized: Unrecognized Compensation Weighted- Expense at Average March 31, 2018 Period Service-Based RSUs $ 2,496 1.93 Performance-Based RSUs 3,874 1.89 Total $ 6,370 1.91 We recognize expense on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. The following table summarizes the status of these plans as of March 31, 2018 : 2014 Plan 2009 Plan 2004 Plan Directors' Plan Awards originally available 1,500,000 3,400,000 6,500,000 N/A Performance-based options outstanding 295,000 — — — Maximum potential RSU and cash settled awards outstanding 745,978 122,600 57,391 9,620 Maximum potential awards outstanding 1,040,978 122,600 57,391 9,620 RSUs and cash settled awards vested and released 315,792 — — — Awards available for grant 143,230 — — — Stock Options We have no stock options exercisable or outstanding as of March 31, 2018 , other than the performance-based stock options described below. Performance-Based Stock Options During 2015 and 2016, the Compensation Committee of the Board of Directors of the Company (the “Committee”) granted a total of 350,000 performance-based stock option awards (“Performance-Based Option Awards”) for certain employees under the 2014 Plan, of which 295,000 remain outstanding after considering forfeitures. The Performance-Based Option Awards have an exercise price of $18.37 , a term of five years , and generally will become exercisable (provided the optionee remains employed by the Company or an affiliate) upon our attainment of at least $600,000 in revenues during any of our trailing four quarterly periods (as determined by the Committee) during the term. We have not recognized any expense on these Performance-Based Option Awards for the three -month periods ended March 31, 2018 and 2017 , since the revenue target was not deemed likely to be attained based on our current forecast. Service-Based Restricted Stock Units The following table summarizes the service-based RSU activity as of and for the three months ended March 31, 2018 : Units Weighted Outstanding at January 1, 2018 399,347 $ 14.60 Granted 71,722 26.20 Vested and released (60,797 ) 16.43 Forfeited (515 ) 14.83 Outstanding at March 31, 2018 409,757 $ 16.36 Releasable at March 31, 2018 260,478 $ 12.48 Performance and Market-Based Restricted Stock Units The following table summarizes the performance and market-based RSU activity as of and for the three months ended March 31, 2018 : Units Weighted Outstanding at January 1, 2018 271,305 $ 18.77 Granted 72,043 28.75 Attained by performance 18,600 17.66 Released (72,456 ) 18.66 Forfeited (21,700 ) 17.66 Outstanding at March 31, 2018 267,792 $ 21.44 Releasable at March 31, 2018 — $ — The following table summarizes each grant of performance awards outstanding at March 31, 2018 . Description Grant Date Vesting Year Vesting Dependency Target Units Outstanding Maximum Number of Units to be Granted 2016 - 2018 Performance RSUs February 16, 2016 2018 35% RTSR, 35% sales growth, 30% cash flow 92,840 185,680 2017 - 2019 Performance RSUs February 9, 2017 2019 35% RTSR, 35% sales growth, 30% cash flow 71,796 143,592 2017 - 2019 Performance RSUs February 9, 2017 2018 - 2020 Operating Income 27,113 27,113 2018 - 2020 Performance RSUs February 8, 2018 2020 35% RTSR, 35% sales growth, 30% cash flow 40,223 80,446 2018 - 2020 Performance RSUs February 16, 2018 2020 35% RTSR, 35% sales growth, 30% cash flow 31,820 63,640 Single Crystal Performance RSUs March 31, 2016 2018 Various 4,000 8,000 Cash-Settled Restricted Stock Units Cash-Settled RSUs entitle the holder to receive the cash equivalent of one share of common stock for each unit when the unit vests. These RSUs are issued to key employees residing in foreign locations as direct compensation. Generally, these RSUs vest over a three-year period. Cash-Settled RSUs are classified as liabilities and are remeasured at each reporting date until settled. At March 31, 2018 and December 31, 2017 we had 17,361 and 14,082 cash-settled RSUs outstanding, respectively. At March 31, 2018 and December 31, 2017, liabilities of $ 127 and $ 241 , respectively were included in Accrued liabilities on our Condensed Consolidated Balance Sheets.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We use interest rate swaps to convert our Revolving Credit Facility’s variable rate of interest into a fixed rate and foreign currency forward contracts to hedge the effect of foreign currency changes on certain revenues and costs denominated in foreign currencies. These derivative financial instruments are measured at fair value on a recurring basis. The table below summarizes our financial assets that were measured at fair value on a recurring basis at March 31, 2018 : Quoted Prices Asset in Active Significant Carrying Markets for Other Significant Value at Identical Observable Unobservable March 31, Instruments Inputs Inputs 2018 (Level 1) (Level 2) (Level 3) Interest rate swaps $ 1,294 $ — $ 1,294 $ — Foreign currency hedges $ 34 $ — $ 34 $ — The table below summarizes the financial assets (liabilities) that were measured at fair value on a recurring basis as of December 31, 2017 : Quoted Asset Prices (Liability) in Active Significant Carrying Markets for Other Significant Value at Identical Observable Unobservable December 31, Instruments Inputs Inputs 2017 (Level 1) (Level 2) (Level 3) Interest rate swaps $ 971 $ — $ 971 $ — Foreign currency hedges $ (742 ) $ — $ (742 ) $ — The fair value of our interest rate swaps and foreign currency hedges were measured using standard valuation models using market-based observable inputs over the contractual terms, including forward yield curves, among others. There is a readily determinable market for these derivative instruments, but that market is not active and therefore they are classified within Level 2 of the fair value hierarchy. The table below provides a reconciliation of the recurring financial assets (liabilities) for our derivative instruments: Foreign Interest Currency Total gains (losses) for the period: Rate Swaps Hedges Balance at January 1, 2017 $ 753 $ (601 ) Settled in cash — (132 ) Included in earnings — 38 Included in other comprehensive earnings 218 (47 ) Balance at December 31, 2017 $ 971 $ (742 ) Settled in cash — 8 Included in earnings (65 ) 48 Included in other comprehensive earnings 388 720 Balance at March 31, 2018 $ 1,294 $ 34 Our long-term debt consists of the Revolving Credit Facility which is recorded at its carrying value. There is a readily determinable market for our long-term debt and it is classified within Level 2 of the fair value hierarchy as the market is not deemed to be active. The fair value of long-term debt approximates carrying value and was determined by valuing a similar hypothetical coupon bond and attributing that value to our long-term debt under the Revolving Credit Facility.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rates for the three -month periods ended March 31, 2018 and 2017 were: Three Months Ended March 31, March 31, 2018 2017 Effective tax rate 24.5 % 30.6 % Our effective income tax rate was 24.5% and 30.6% in the first quarters of 2018 and 2017 , respectively. The decrease in the effective tax rate for the three months ended March 31, 2018 , compared with the same period in 2017, was primarily attributed to the impact of the Tax Cuts and Jobs Act (the "Act"), which reduced the U.S. federal corporate income tax rate from 35 percent to 21 percent effective January 1, 2018. Our effective tax rate is higher than the U.S. statutory federal tax rate primarily due to state taxes and foreign earnings that are taxed at higher rates. The tax rate in the first quarter of 2017 was lower than the U.S. statutory federal tax rate primarily due to lower foreign tax rates applicable on foreign earnings during that period. We recognized the income tax effects of the Act in the audited consolidated financial statements included in our 2017 Annual Report on Form 10-K. Staff Accounting Bulletin No. 118 provides Securities and Exchange Commission staff guidance for the application of ASC Topic 740, Income Taxes, which allows for a measurement period of up to one year from the enactment date for companies to complete their accounting for the U.S. tax law changes. As such, our 2017 financial results reflected a provisional amount of $6,267 that was recorded as deferred tax expense related to the revaluation of deferred tax assets and liabilities, and a provisional amount of $11,734 that was recorded as current tax expense related to the transition tax on the mandatory deemed repatriation of foreign earnings. During the three-months ended March 31, 2018 , we recognized measurement period adjustments that resulted in additional tax expense of $ 241 . Any subsequent adjustments to our provisional estimated amounts will be recorded to tax expense in the quarter when the analysis is complete. For the calendar year beginning in 2018, we are subject to several new provisions of the Act including but not limited to the Global Intangible Low-Taxed Income (GILTI) tax. We have provisionally elected to account for any GILTI tax in the period in which it is incurred, and therefore have not provided any deferred tax impacts in our consolidated financial statements. For these computations, we have recorded an estimate in our effective tax rate for the three-months ended March 31, 2018 . The company will continue to refine our estimates as additional guidance and information becomes available. In general, outside of Canada and the U.K., it has been our historical practice to permanently reinvest the earnings of our non-U.S. subsidiaries into those operations. However, as a result of the Act, we can repatriate our cumulative undistributed foreign earnings to the U.S. as needed with minimal U.S. income tax consequences other than the one-time deemed repatriation tax. We will continue to evaluate whether to repatriate all or a portion of the cumulative undistributed foreign earnings based on expansion needs and as circumstances change. We are still evaluating whether to change our indefinite reinvestment assertion in light of the Act and consider that conclusion to be incomplete under guidance issued by SAB 118. If we subsequently change our assertion during the measurement period, we will account for the change in assertion as part of the Act enactment. Our continuing practice is to recognize interest and/or penalties related to income tax matters as income tax expense. For the three months ended March 31, 2018 , and 2017 , we recorded $14 and $176 , respectively of interest or penalties in income tax expense.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Change in Accounting Principle In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)". The guidance in this ASU affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). This guidance requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. Beginning in January 2018, CTS adopted the provisions of Topic 606 under the modified retrospective method, which requires a cumulative effect adjustment to the opening balance of retained earnings on the date of adoption. This approach was applied to contracts not completed as of December 31, 2017. At date of adoption, there was no significant change to our past revenue recognition practices and therefore no adjustment to the opening balance of retained earnings was required.
Basis of Presentation	The accompanying condensed consolidated financial statements have been prepared by CTS Corporation (“CTS” "we", "our", "us" or the "Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been omitted pursuant to such rules and regulations. The unaudited condensed consolidated financial statements should be read in conjunction with the financial statements, notes thereto, and other information included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2017 . The accompanying unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments (consisting of normal recurring items) necessary for a fair statement, in all material respects, of the financial position and results of operations for the periods presented. The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ materially from those estimates. The results of operations for the interim periods are not necessarily indicative of the results for the entire year.
Recent Accounting Pronouncements	NOTE 18 — Recent Accounting Pronouncements ASU 2018-02 "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2018-02 "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income". This ASU allows for a reclassification from accumulated comprehensive income to retained earnings for the stranded tax effects resulting from the Tax Cuts and Jobs Act enacted in December 2017. This ASU is effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted in any interim period for which financial statements have not been issued. We are evaluating the impact this ASU may have on our financial statements. ASU 2017-12 "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities" In August 2017, the FASB issued ASU No. 2017-12 "Derivatives and Hedging (Topic 815): Target Improvements to Accounting for Hedging Activities" . This ASU is meant to better align an entity's risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This ASU is effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted in any interim period after issuance. Any changes should be applied to all hedging relationships that exist at the date of adoption by applying a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year of adoption. Presentation and disclosure guidance is to be applied prospectively. We are still evaluating the impact this ASU may have on our financial statements. ASU 2017-07 "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost" In March 2017, the FASB issued ASU No. 2017-07 "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and net Periodic Post-retirement Benefit Cost" . This ASU is meant to improve the presentation of net periodic pension and net periodic post-retirement benefits costs. Currently, pension and post-retirement benefit costs are comprised of several components reflecting the different aspects of an employer's financial arrangements and cost of providing benefits to employees. These components are aggregated for reporting, but prior guidance does not prescribe where the net cost should be presented in the income statement or capitalized in assets. This ASU requires disaggregation of the service cost component from other components of net benefit cost and provides explicit guidance on how to present the service cost and other components in the income statement, allowing only the service cost component of net benefit costs to be eligible for capitalization. These amendments should be applied retrospectively for the presentation of service cost and other components of net periodic pension and net post-retirement benefit cost in the income statement and prospectively for the capitalization of service cost and net periodic pension cost and periodic post-retirement benefit in assets. We adopted this ASU as of January 1, 2018. It did not have a material impact on our financial statements because the service cost component of our pension cost is immaterial to our financial results on a prospective basis. ASU 2017-04 "Intangibles -Goodwill and Other (Topic 305): Simplifying the Test for Goodwill Impairment" In January 2017, the FASB issued ASU No. 2017-04 "Intangibles - Goodwill and Other (Topic 305): Simplifying the Test for Goodwill Impairment" . This ASU is meant to simplify the subsequent measurement of goodwill for impairment by eliminating the current Step 2 analysis in computing the implied fair value of goodwill. In addition, this ASU requires an entity to consider income tax effects on any tax deductible goodwill on the carrying amount of the reporting unit when measuring an impairment loss, if applicable. Under this ASU, impairment is determined by comparing the reporting unit's fair value to the carrying value. This amendment is effective for fiscal years beginning after December 15, 2019, with early adoption permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We do not expect this guidance to have an impact on our financial statements. ASU 2017-01 "Business Combinations (Topic 805): Clarifying the Definition of Business" In January 2017, the FASB issued ASU No. 2017-01 "Business Combinations (Topic 805): Clarifying the Definition of Business" . This ASU is meant to clarify the definition of a business to add guidance when determining when an acquisition or disposal should be accounted for as a sale of assets or business. This ASU provides a more robust framework to use in determining when a set of assets or activities should be classified as a business, providing more consistency in accounting for business or asset acquisitions. This ASU is effective for public companies, for fiscal years beginning after December 15, 2017, including interim periods within those periods. The ASU will be applied prospectively. ASU 2016-16 "Income Taxes (Topic 740) Intra-Entity Transfers of Assets Other Than Inventory" In October 2016, the FASB issued ASU No. 2016-16, "Intra-Entity Transfers of Assets Other Than Inventory" . This ASU is meant to improve the accounting for the income tax effect of intra-entity transfers of assets other than inventory. Currently, US GAAP prohibits the recognition of current and deferred income taxes for intra-entity asset transfers until the asset is sold to a third party. This ASU will now require companies to recognize the income tax effect of an intra-entity asset transfer (other than inventory) when the transaction occurs. This ASU is effective for public companies, for fiscal years beginning after December 15, 2019 and interim periods within those annual reporting periods. Early adoption is permitted and is to be applied on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. This guidance is not expected to have a material impact on our consolidated financial statements. ASU 2016-15 "Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments" In August 2016, the FASB issued ASU No. 2016-15, "Classification of Certain Cash Receipts and Cash Payments". This ASU reduces the diversity in reporting of eight specific cash flow issues due to accounting guidance that is unclear or does not exist. The eight issues relate to certain debt activities, business combination activities, insurance settlements and other various activities. We adopted this ASU as of January 1, 2018 and it did not have an impact on our financial statements. ASU 2016-02 "Leases (Topic 842)" In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)". This amendment created a new Topic under the accounting standards codification to account for the provisions of the ASU. This amendment is meant to provide transparency and to improve comparability between entities. The ASU requires companies to record an asset and liability on the balance sheet for leases that were formerly designated as operating leases as well as leases designated as financing leases. The provisions of the ASU predominately change the recognition of leases for lessees; the provisions do not substantially change the accounting for lessors. This ASU will supersede the provisions of Topic 840 Leases. The liability recorded for a lease is meant to recognize the lease payments and the asset as a right to use the underlying asset for the lease, including optional periods if it is reasonably certain the option will be exercised. Recording of the liability should be based on the present value of the lease payments. If a lease term is less than twelve months, a company is allowed to elect not to record the asset and liability. Expense related to these leases are to be amortized on a straight-line basis over the expected term of the lease. Additionally, the provisions of this ASU provide additional guidance on separating lease terms from maintenance and other type of provisions that provide a good or service, accounting for sale-leaseback provisions, and leveraged leases. Reporting in the cash flow statement remains virtually unchanged. Additional qualitative and quantitative disclosures are required. These updates are required to be applied under a modified retrospective approach from the beginning of the earliest period presented in our financial statements upon adoption. The modified approach provides optional practical expedients that may be elected, which will allow companies to continue to account for leases under the previous guidance for leases that commenced prior to the effective date. The provisions of this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those periods. Early adoption is allowed. We have not yet commenced the process for evaluating the impact of this ASU on our financial statements, and therefore it's impact has not yet been determined.

Revenue Recognition Contract As

Revenue Recognition Contract Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Contract Assets and Liabilities [Abstract]
Contract with Customer, Asset and Liability [Table Text Block]	Contract assets and liabilities included in our Condensed Consolidated Balance Sheets are as follows: As of March 31, December 31, 2018 2017 Contract Assets Prepaid rebates included in Other current assets $ 41 $ 52 Prepaid rebates included in Other assets 465 465 Total Contract Assets $ 506 $ 517 Contract Liabilities Customer discounts and price concessions included in Accrued liabilities $ (1,972 ) $ (1,133 ) Customer rights of return included in Accrued liabilities (249 ) (462 ) Total Contract Liabilities $ (2,221 ) $ (1,595 )

Revenue Recognition Disaggregat

Revenue Recognition Disaggregated Revenue (Tables)	3 Months Ended
	Mar. 31, 2018
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents revenues disaggregated by the major markets we serve: Three Months Ended March 31, 2018 March 31, 2017 Aero & Defense $ 5,103 $ 4,657 Industrial 20,356 17,112 Medical 9,241 6,814 Telecom & IT 4,525 5,178 Transportation 74,305 66,393 Total $ 113,530 $ 100,154

Accounts Receivable (Tables)

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Components of Accounts Receivable	The components of accounts receivable are as follows: As of March 31, December 31, 2018 2017 Accounts receivable, gross $ 70,432 $ 70,941 Less: Allowance for doubtful accounts (484 ) (357 ) Accounts receivable, net $ 69,948 $ 70,584

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories consist of the following: As of March 31, December 31, 2018 2017 Finished goods $ 10,678 $ 9,203 Work-in-process 12,089 12,065 Raw materials 21,294 21,150 Less: Inventory reserves (6,120 ) (5,822 ) Inventories, net $ 37,941 $ 36,596

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment	Property, plant and equipment is comprised of the following: As of March 31, December 31, 2018 2017 Land $ 1,137 $ 1,130 Buildings and improvements 64,457 64,201 Machinery and equipment 229,041 223,650 Less: Accumulated depreciation (203,950 ) (200,734 ) Property, plant and equipment, net $ 90,685 $ 88,247 Depreciation expense for the three months ended March 31, 2018 $ 3,763 Depreciation expense for the three months ended March 31, 2017 $ 3,172

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Net Pension Income or Postretirement Expense	Net pension expense (income) for our domestic and foreign plans was as follows: Three Months Ended March 31, March 31, 2018 2017 Net pension expense (income) $ 79 $ (433 ) The components of net pension expense (income) for our domestic and foreign plans include the following: Domestic Pension Plans Foreign Pension Plans Three Months Ended Three Months Ended March 31, March 31, March 31, March 31, 2018 2017 2018 2017 Service cost $ — $ — $ 11 $ 12 Interest cost 1,781 2,068 11 8 Expected return on plan assets (1) (3,225 ) (4,061 ) (7 ) (5 ) Amortization of loss 1,466 1,446 42 38 Other cost due to retirement — 61 — — Expense (income), net $ 22 $ (486 ) $ 57 $ 53 (1) Expected return on plan assets is net of expected investment expenses and certain administrative expenses. Net post-retirement expense for our other post-retirement plan includes the following components: Three Months Ended March 31, March 31, 2018 2017 Service cost $ 1 $ 1 Interest cost 39 40 Amortization of gain (12 ) (25 ) Post-retirement expense $ 28 $ 16

Other Intangible Assets (Tables

Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of other intangible assets	Intangible assets consist of the following components: As of March 31, 2018 Gross Accumulated Net Amount Customer lists/relationships $ 64,323 $ (34,536 ) $ 29,787 Patents 10,319 (10,319 ) — Technology and other intangibles 44,460 (11,201 ) 33,259 In process research and development 2,200 — 2,200 Other intangible assets, net $ 121,302 $ (56,056 ) $ 65,246 Amortization expense for the three months ended March 31, 2018 $ 1,720 As of December 31, 2017 Gross Accumulated Net Amount Customer lists/relationships $ 64,323 $ (33,685 ) $ 30,638 Patents 10,319 (10,319 ) — Technology and other intangibles 44,460 (10,355 ) 34,105 In process research and development 2,200 — 2,200 Other intangible assets, net $ 121,302 $ (54,359 ) $ 66,943 Amortization expense for the three months ended March 31, 2017 $ 1,536
Summary of amortization expense remaining for other intangible assets	mortization expense for other intangible assets as of March 31, 2018 is as follows: Amortization 2018 $ 5,066 2019 6,754 2020 6,624 2021 6,467 2022 6,230 Thereafter 34,105 Total amortization expense $ 65,246

Costs Associated with Exit an31

Costs Associated with Exit and Restructuring Activities (Tables)	3 Months Ended
	Mar. 31, 2018
Restructuring Reserve Activity	The following table displays the restructuring liability activity for all plans for the three months ended March 31, 2018 : Combined Plans Restructuring liability at January 1, 2018 $ 1,913 Restructuring charges 1,195 Cost paid (1,376 ) Other activity (1) (8 ) Restructuring liability at March 31, 2018 $ 1,724 (1) Other activity includes the effects of currency translation and other charges that do not flow through restructuring expense.
June 2016 Plan
Restructuring and Restructuring Related Charges of Actual Costs	Total restructuring charges, all related to the June 2016 Plan described below, were as follows: Three Months Ended March 31, 2018 March 31, 2017 Restructuring charges $ 1,195 $ 777
Schedule of Planned and Actual Costs Incurred to Date	The following table displays the planned restructuring charges associated with the June 2016 Plan as well as a summary of the actual costs incurred through March 31, 2018 : Actual costs Planned incurred through June 2016 Plan Costs March 31, 2018 Workforce reduction $ 3,075 $ 3,089 Building and equipment relocation 9,025 4,548 Other charges 1,300 745 Total restructuring charges $ 13,400 $ 8,382

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Other Liabilities Disclosure [Abstract]
Components of Accrued Liabilities	The components of accrued liabilities are as follows: As of March 31, December 31, 2018 2017 Accrued product related costs $ 5,008 $ 5,297 Accrued income taxes 6,770 5,475 Accrued property and other taxes 2,404 997 Accrued professional fees 2,730 2,228 Contract liabilities 2,221 1,595 Dividends payable 1,321 1,318 Remediation reserves 15,119 17,067 Other accrued liabilities 6,454 7,367 Total accrued liabilities $ 42,027 $ 41,344

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Summary of Long-Term Debt	Long-term debt was comprised of the following: As of March 31, December 31, 2018 2017 Total credit facility $ 300,000 $ 300,000 Balance outstanding $ 74,000 $ 76,300 Standby letters of credit $ 2,065 $ 2,065 Amount available $ 223,935 $ 221,635 Weighted-average interest rate 2.90 % 2.30 % Commitment fee percentage per annum 0.25 % 0.25 %

Derivative Financial Instrume34

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The location and fair values of derivative instruments designated as hedging instruments in the Condensed Consolidated Balance Sheets as of March 31, 2018 , are shown in the following table: As of March 31, December 31, 2018 2017 Interest rate swaps reported in Other current assets $ 424 $ 278 Interest rate swaps reported in Other assets $ 870 $ 693 Foreign currency hedges reported in Other current assets $ 34 $ — Foreign currency hedges reported in Accrued liabilities $ — $ (742 )
Derivative Instruments, Gain (Loss)	The effect of derivative instruments on the Condensed Consolidated Statements of Earnings is as follows: Three Months Ended March 31, March 31, 2018 2017 Foreign Exchange Contracts: Loss recognized in Net sales $ (58 ) $ (2 ) Gain (loss) recognized in Cost of goods sold 108 (144 ) Loss recognized in Selling, general and administrative expense (1 ) (3 ) Loss recognized in Other income (1 ) (8 ) Interest Rate Swaps: Benefit recorded in Interest expense $ 65 $ — Total gain (loss) $ 113 $ (157 ) The table below provides a reconciliation of the recurring financial assets (liabilities) for our derivative instruments: Foreign Interest Currency Total gains (losses) for the period: Rate Swaps Hedges Balance at January 1, 2017 $ 753 $ (601 ) Settled in cash — (132 ) Included in earnings — 38 Included in other comprehensive earnings 218 (47 ) Balance at December 31, 2017 $ 971 $ (742 ) Settled in cash — 8 Included in earnings (65 ) 48 Included in other comprehensive earnings 388 720 Balance at March 31, 2018 $ 1,294 $ 34

Accumulated Other Comprehensi35

Accumulated Other Comprehensive (Loss) Income (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive (Loss) Income	The components of accumulated other comprehensive (loss) income for the three months ended March 31, 2018 , are as follows: Gain (Loss) As of Gain (Loss) Reclassified As of December 31, Recognized from AOCI March 31, 2017 in OCI to Income 2018 Changes in fair market value of hedges: Gross $ 289 $ 1,157 $ (114 ) $ 1,332 Income tax (benefit) expense (105 ) (261 ) 25 (341 ) Net 184 896 (89 ) 991 Changes in unrealized pension cost: Gross (130,096 ) — 1,424 (128,672 ) Income tax expense (benefit) 52,837 — (317 ) 52,520 Net (77,259 ) — 1,107 (76,152 ) Cumulative translation adjustment: Gross (1,985 ) 238 — (1,747 ) Income tax expense 100 5 — 105 Net (1,885 ) 243 — (1,642 ) Total accumulated other comprehensive (loss) income $ (78,960 ) $ 1,139 $ 1,018 $ (76,803 ) The components of accumulated other comprehensive (loss) income for the three months ended March 31, 2017 , are as follows: Gain (Loss) As of Gain (Loss) Reclassified As of December 31, Recognized from AOCI March 31, 2016 in OCI to Income 2017 Changes in fair market value of hedges: Gross $ 116 $ 1,042 $ 150 $ 1,308 Income tax (benefit) expense (42 ) (378 ) (54 ) (474 ) Net 74 664 96 834 Changes in unrealized pension cost: Gross (151,618 ) — 1,296 (150,322 ) Income tax expense (benefit) 60,672 — (480 ) 60,192 Net (90,946 ) — 816 (90,130 ) Cumulative translation adjustment: Gross (2,414 ) 86 — (2,328 ) Income tax expense 92 2 — 94 Net (2,322 ) 88 — (2,234 ) Total accumulated other comprehensive (loss) income $ (93,194 ) $ 752 $ 912 $ (91,530 )

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Summary of Share Count and Par Value Data Related to Shareholders' Equity	Share count and par value data related to shareholders’ equity are as follows: As of March 31, December 31, 2018 2017 Preferred Stock Par value per share No par value No par value Shares authorized 25,000,000 25,000,000 Shares outstanding — — Common Stock Par value per share No par value No par value Shares authorized 75,000,000 75,000,000 Shares issued 56,711,792 56,632,488 Shares outstanding 33,017,770 32,938,466 Treasury stock Shares held 23,694,022 23,694,022
Summary of Common Shares Outstanding	A roll-forward of common shares outstanding is as follows: Three Months Ended March 31, March 31, 2018 2017 Balance at the beginning of the year 32,938,466 32,762,494 Repurchases — — Shares issued upon exercise of stock options — — Restricted share issuances 79,304 88,225 Balance at the end of the period 33,017,770 32,850,719 Certain potentially dilutive restricted stock units are excluded from diluted earning per share because they are anti-dilutive. The number of awards that were anti-dilutive at March 31, 2018 and March 31, 2017 were 78,317 and 88,592 , respectively.

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Equity-Based Compensation Expense	The following table summarizes the compensation expense included in selling, general and administrative expenses in the Condensed Consolidated Statements of Earnings related to stock-based compensation plans: Three Months Ended March 31, March 31, 2018 2017 Service-Based RSUs $ 455 $ 550 Performance-Based RSUs 510 384 Cash-settled RSUs (42 ) (54 ) Total $ 923 $ 880 Income tax benefit 209 331 Net $ 714 $ 549
Schedule of Unrecognized Equity-Based Compensation Expense	The following table summarizes the unrecognized compensation expense related to non-vested RSUs by type and the weighted-average period in which the expense is to be recognized: Unrecognized Compensation Weighted- Expense at Average March 31, 2018 Period Service-Based RSUs $ 2,496 1.93 Performance-Based RSUs 3,874 1.89 Total $ 6,370 1.91
Summary of Status of Equity-Based Compensation Plans	The following table summarizes the status of these plans as of March 31, 2018 : 2014 Plan 2009 Plan 2004 Plan Directors' Plan Awards originally available 1,500,000 3,400,000 6,500,000 N/A Performance-based options outstanding 295,000 — — — Maximum potential RSU and cash settled awards outstanding 745,978 122,600 57,391 9,620 Maximum potential awards outstanding 1,040,978 122,600 57,391 9,620 RSUs and cash settled awards vested and released 315,792 — — — Awards available for grant 143,230 — — —
Summary of Service-Based Restricted Stock Units	summarizes the service-based RSU activity as of and for the three months ended March 31, 2018 : Units Weighted Outstanding at January 1, 2018 399,347 $ 14.60 Granted 71,722 26.20 Vested and released (60,797 ) 16.43 Forfeited (515 ) 14.83 Outstanding at March 31, 2018 409,757 $ 16.36 Releasable at March 31, 2018 260,478 $ 12.48
Schedule of Components of Performance-Based RSU's	The following table summarizes the performance and market-based RSU activity as of and for the three months ended March 31, 2018 : Units Weighted Outstanding at January 1, 2018 271,305 $ 18.77 Granted 72,043 28.75 Attained by performance 18,600 17.66 Released (72,456 ) 18.66 Forfeited (21,700 ) 17.66 Outstanding at March 31, 2018 267,792 $ 21.44 Releasable at March 31, 2018 — $ — The following table summarizes each grant of performance awards outstanding at March 31, 2018 . Description Grant Date Vesting Year Vesting Dependency Target Units Outstanding Maximum Number of Units to be Granted 2016 - 2018 Performance RSUs February 16, 2016 2018 35% RTSR, 35% sales growth, 30% cash flow 92,840 185,680 2017 - 2019 Performance RSUs February 9, 2017 2019 35% RTSR, 35% sales growth, 30% cash flow 71,796 143,592 2017 - 2019 Performance RSUs February 9, 2017 2018 - 2020 Operating Income 27,113 27,113 2018 - 2020 Performance RSUs February 8, 2018 2020 35% RTSR, 35% sales growth, 30% cash flow 40,223 80,446 2018 - 2020 Performance RSUs February 16, 2018 2020 35% RTSR, 35% sales growth, 30% cash flow 31,820 63,640 Single Crystal Performance RSUs March 31, 2016 2018 Various 4,000 8,000

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Financial Liability Measured at Fair Value on a Recurring Basis	The table below summarizes our financial assets that were measured at fair value on a recurring basis at March 31, 2018 : Quoted Prices Asset in Active Significant Carrying Markets for Other Significant Value at Identical Observable Unobservable March 31, Instruments Inputs Inputs 2018 (Level 1) (Level 2) (Level 3) Interest rate swaps $ 1,294 $ — $ 1,294 $ — Foreign currency hedges $ 34 $ — $ 34 $ — The table below summarizes the financial assets (liabilities) that were measured at fair value on a recurring basis as of December 31, 2017 : Quoted Asset Prices (Liability) in Active Significant Carrying Markets for Other Significant Value at Identical Observable Unobservable December 31, Instruments Inputs Inputs 2017 (Level 1) (Level 2) (Level 3) Interest rate swaps $ 971 $ — $ 971 $ — Foreign currency hedges $ (742 ) $ — $ (742 ) $ —
Reconciliation of Recurring Financial Liability Related to Interest Rate Swaps	The effect of derivative instruments on the Condensed Consolidated Statements of Earnings is as follows: Three Months Ended March 31, March 31, 2018 2017 Foreign Exchange Contracts: Loss recognized in Net sales $ (58 ) $ (2 ) Gain (loss) recognized in Cost of goods sold 108 (144 ) Loss recognized in Selling, general and administrative expense (1 ) (3 ) Loss recognized in Other income (1 ) (8 ) Interest Rate Swaps: Benefit recorded in Interest expense $ 65 $ — Total gain (loss) $ 113 $ (157 ) The table below provides a reconciliation of the recurring financial assets (liabilities) for our derivative instruments: Foreign Interest Currency Total gains (losses) for the period: Rate Swaps Hedges Balance at January 1, 2017 $ 753 $ (601 ) Settled in cash — (132 ) Included in earnings — 38 Included in other comprehensive earnings 218 (47 ) Balance at December 31, 2017 $ 971 $ (742 ) Settled in cash — 8 Included in earnings (65 ) 48 Included in other comprehensive earnings 388 720 Balance at March 31, 2018 $ 1,294 $ 34

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Reconciliation of Effective Income Taxes Rate	The effective tax rates for the three -month periods ended March 31, 2018 and 2017 were: Three Months Ended March 31, March 31, 2018 2017 Effective tax rate 24.5 % 30.6 %

Revenue Recognition Contract 40

Revenue Recognition Contract Assets and Liabilities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Contract Assets and Liabilities [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 131
Contract with Customer, Asset, Net, Current	41,000	$ 52,000
Contract with Customer, Asset, Net, Noncurrent	465,000	465,000
Contract with Customer, Asset, Net	506,000	517,000
Customer Contract Liability Discounts	(1,972,000)	(1,133,000)
Customer Contract Liability Rights of Return	(249,000)	(462,000)
Contract with Customer, Liability, Current	$ (2,221,000)	$ (1,595,000)

Revenue Recognition Disaggreg41

Revenue Recognition Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table presents revenues disaggregated by the major markets we serve: Three Months Ended March 31, 2018 March 31, 2017 Aero & Defense $ 5,103 $ 4,657 Industrial 20,356 17,112 Medical 9,241 6,814 Telecom & IT 4,525 5,178 Transportation 74,305 66,393 Total $ 113,530 $ 100,154
Revenues	$ 113,530	$ 100,154
Aerospace and Defense [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	5,103	4,657
Industrial [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	20,356	17,112
Medical [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	9,241	6,814
Telecommunications & IT [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	4,525	5,178
Transportation [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	74,305	66,393

Accounts Receivable - Component

Accounts Receivable - Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts Receivable
Accounts receivable, gross	$ 70,432	$ 70,941
Less: Allowance for doubtful accounts	(484)	(357)
Accounts receivable, net	$ 69,948	$ 70,584

Inventories - Summary of Invent

Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventories
Finished goods	$ 10,678	$ 9,203
Work-in-process	12,089	12,065
Raw materials	21,294	21,150
Less: Inventory reserves	(6,120)	(5,822)
Inventories, net	$ 37,941	$ 36,596

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Property, plant and equipment
Less: Accumulated depreciation	$ (203,950)		$ (200,734)
Property, plant and equipment, net	90,685		88,247
Depreciation	3,763	$ 3,172
Land
Property, plant and equipment
Property, plant and equipment gross	1,137		1,130
Buildings and improvements
Property, plant and equipment
Property, plant and equipment gross	64,457		64,201
Machinery and equipment
Property, plant and equipment
Property, plant and equipment gross	$ 229,041		$ 223,650

Retirement Plans - Net Pension

Retirement Plans - Net Pension Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Pension Plans
Defined Benefit Plan Disclosure
Net pension expense (income)	$ 79	$ (433)

Retirement Plans - Net Pensio46

Retirement Plans - Net Pension Income Domestic and Foreign (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Pension Plans
Net pension expense (income)
(Income) expense, net	$ 79	$ (433)
Foreign Plan [Member]
Net pension expense (income)
Service cost	11	12
Interest cost	11	8
Defined Benefit Plan, Expected Return on Plan Assets, Net of Expenses	(7)	(5)
Amortization of loss	42	38
(Income) expense, net	57	53
Domestic Plan [Member]
Net pension expense (income)
Interest cost	1,781	2,068
Defined Benefit Plan, Expected Return on Plan Assets, Net of Expenses	(3,225)	(4,061)
Amortization of loss	1,466	1,446
Other cost due to retirement	0	61
(Income) expense, net	$ 22	$ (486)

Retirement Plans - Other Postre

Retirement Plans - Other Postretirement Benefit Plan (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure
Service cost	$ 1	$ 1
Interest cost	39	40
Amortization of gain	(12)	(25)
(Income) expense, net	$ 28	$ 16

Other Intangible Assets - Summa

Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Other Intangible Assets
Gross Carrying Amount	$ 121,302		$ 121,302
Accumulated Amortization	(56,056)		(54,359)
Total amortization expense	65,246		66,943
Amortization expense	1,720	$ 1,536
Customer lists/relationships
Other Intangible Assets
Gross Carrying Amount	64,323		64,323
Accumulated Amortization	(34,536)		(33,685)
Total amortization expense	29,787		30,638
Patents
Other Intangible Assets
Gross Carrying Amount	10,319		10,319
Accumulated Amortization	(10,319)		(10,319)
Total amortization expense	0		0
Technology and other intangibles
Other Intangible Assets
Gross Carrying Amount	44,460		44,460
Accumulated Amortization	(11,201)		(10,355)
Total amortization expense	33,259		34,105
In process research and development
Other Intangible Assets
Gross Carrying Amount			2,200
Total amortization expense	2,200		$ 2,200
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 2,200

Other Intangible Assets - Sum49

Other Intangible Assets - Summary of Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule
2,016	$ 5,066
2,017	6,754
2,018	6,624
2,019	6,467
2,020	6,230
Thereafter	34,105
Total amortization expense	$ 65,246	$ 66,943

Costs Associated with Exit an50

Costs Associated with Exit and Restructuring Activities - Summary (Details) - Operating Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
June 2013 Plan, April 2014 Plan and June 2016 Plan
Total restructuring, impairment and restructuring related charges
Restructuring and impairment charges	$ 1,195
June 2013 Plan, April 2014 Plan and June 2016
Total restructuring, impairment and restructuring related charges
Restructuring and impairment charges		$ 777

Costs Associated with Exit an51

Costs Associated with Exit and Restructuring Activities Costs Associated with Exit and Restructuring Activities - June 2016 Plan (Details) - June 2016 Plan $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)employee	Dec. 31, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated | employee	230
Actual costs incurred	$ 4,548
Total restructuring, impairment and restructuring related charges
Restructuring Reserve	1,279	$ 1,460
Operating Earnings
Restructuring Cost and Reserve [Line Items]
Planned Costs	13,400
Actual costs incurred	8,382
Equipment relocation
Restructuring Cost and Reserve [Line Items]
Planned Costs	9,025
Other charges
Restructuring Cost and Reserve [Line Items]
Planned Costs	1,300
Other charges | Operating Earnings
Restructuring Cost and Reserve [Line Items]
Actual costs incurred	745
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Planned Costs	3,075
Workforce reduction | Operating Earnings
Restructuring Cost and Reserve [Line Items]
Actual costs incurred	3,089
Minimum
Restructuring Cost and Reserve [Line Items]
Planned Costs	$ 13,400

Costs Associated with Exit an52

Costs Associated with Exit and Restructuring Activities - April 2014 Plan (Details) - April 2014 Plan $ in Thousands	3 Months Ended
	Mar. 31, 2016employee	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve | $		$ 445	$ 453
Restructuring charges
Elimination of workforce | employee	120

Costs Associated with Exit an53

Costs Associated with Exit and Restructuring Activities - Restructuring Reserve Activity (Details) - June 2013 Plan, April 2014 Plan and June 2016 Plan $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Restructuring reserve activity
Restructuring liability at beginning	$ 1,913
Restructuring and restructuring-related charges	1,195
Cost paid	(1,376)
Restructuring liability at ending	1,724
Restructuring Reserve, Translation and Other Adjustment	$ (8)

Accrued Liabilities - Component

Accrued Liabilities - Components of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities
Accrued product related costs	$ 5,008	$ 5,297
Accrued income taxes	6,770	5,475
Accrued property and other taxes	2,404	997
Accrued professional fees	2,730	2,228
Contract with Customer, Liability	2,221	1,595
Dividends payable	1,321	1,318
Remediation reserves	15,119	17,067	$ 18,176
Other accrued liabilities	6,454	7,367
Total accrued liabilities	$ 42,027	$ 41,344

Contingencies Remediation Liabi

Contingencies Remediation Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Accrued Environmental Loss Contingencies, Current	$ 15,119		$ 17,067	$ 18,176
Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses	85	$ 307
Accrual for Environmental Loss Contingencies Payments, Net of Reimbursements	$ (2,033)	$ 1,416

Debt - Long-Term Debt (Details)

Debt - Long-Term Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	May 23, 2016	May 22, 2016	Aug. 10, 2015
Long-term debt
Total credit facility	$ 300,000,000
Amount available	223,935,000		$ 221,635,000
Long-term Line of Credit, Noncurrent	74,000,000		76,300,000
Letters of Credit Outstanding, Amount	2,065,000		2,065,000
Line of Credit | Revolving Credit Facility Due 2020
Long-term debt
Total credit facility			300,000,000	$ 300,000,000	$ 200,000,000	$ 200,000,000
Long-term Line of Credit, Noncurrent	$ 74,000,000		$ 76,300,000
Weighted-average interest rate	2.90%		2.30%
Commitment fee percentage per annum	0.25%	0.25%

Debt - Narratives (Details)

Debt - Narratives (Details) - USD ($)	Aug. 10, 2015	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	May 23, 2016	May 22, 2016
Line of Credit Facility
Line of credit maximum borrowing amount		$ 300,000,000
Debt amortization expense		46,000	$ 46,000
Long-term Line of Credit, Noncurrent		$ 74,000,000		$ 76,300,000
Line of Credit | Revolving Credit Facility Due 2020
Line of Credit Facility
Debt instrument, term	5 years
Line of credit maximum borrowing amount	$ 200,000,000			300,000,000	$ 300,000,000	$ 200,000,000
Line of credit facility contingent increase to maximum borrowing capacity					$ 100,000,000
Commitment fee percentage per annum		0.25%	0.25%
Long-term Line of Credit, Noncurrent		$ 74,000,000		$ 76,300,000
Line of Credit | Revolving Credit Facility Due 2020 Swingline Sublimit
Line of Credit Facility
Line of credit maximum borrowing amount	15,000,000
Line of Credit | Revolving Credit Facility Due 2020 Letter Of Credit Sublimit
Line of Credit Facility
Line of credit maximum borrowing amount	$ 10,000,000
Minimum | Line of Credit | Revolving Credit Facility Due 2020
Line of Credit Facility
Commitment fee percentage per annum	0.20%
Maximum | Line of Credit | Revolving Credit Facility Due 2020
Line of Credit Facility
Commitment fee percentage per annum	0.40%

Derivative Financial Instrume58

Derivative Financial Instruments - Narratives (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)instrument	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2012USD ($)instrument	Jun. 24, 2012USD ($)instrument
Derivative
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax	$ 37	$ 0
Foreign exchange derivative
Derivative
Derivative Asset	351
Derivative Liability	317
Cash Flow Hedge | Designated As Hedging | Foreign currency forward contracts
Derivative
Foreign currency cash flow hedge gain to be reclassified during next 12 months	34
Derivative, notional amount	25,200
Derivative Asset	34
Derivative Liability			$ (742)	$ (601)
Cash Flow Hedge | Designated As Hedging | Interest rate swap
Derivative
Derivative, notional amount					$ 25,000	$ 50,000
Number of derivative instruments held | instrument		3			4	4
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months	424
Derivative Asset	$ 1,294		$ 971	$ 753

Derivative Financial Instrume59

Derivative Financial Instruments - Fair Value of Derivative Instruments (Details) - Cash Flow Hedge - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest rate swap | Other Current Assets [Member]
Derivative Liability
Derivative Asset	$ 424	$ 278
Interest rate swap | Other Noncurrent Assets [Member]
Derivative Liability
Derivative Asset	870	693
Foreign currency hedges | Other Current Liabilities [Member]
Derivative Liability
Derivative Liability	0	(742)
Foreign currency hedges | Other Current Assets [Member]
Derivative Liability
Derivative Asset	34	0
Designated as Hedging Instrument [Member] | Interest rate swap
Derivative Liability
Derivative Asset	1,294	971	$ 753
Designated as Hedging Instrument [Member] | Foreign currency hedges
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	34
Derivative Liability
Derivative Liability		$ (742)	$ (601)
Derivative Asset	$ 34

Derivative Financial Instrume60

Derivative Financial Instruments - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	$ 113	$ (157)
Foreign exchange derivative | Net sales | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	(58)	(2)
Foreign exchange derivative | Cost of goods sold | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	108	(144)
Foreign exchange derivative | Selling, general and administrative expenses | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	(1)	(3)
Foreign exchange derivative | Other income and expenses | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	(1)	(8)
Interest rate swap | Interest expense | Designated As Hedging
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net	$ 65	$ 0

Accumulated Other Comprehensi61

Accumulated Other Comprehensive (Loss) Income - Summary of Components of Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Foreign currency transaction loss
Foreign currency transaction gain (loss)	$ 1,996	$ 395
AOCI Attributable to Parent, Net of Tax
Total accumulated other comprehensive (loss) income, beginning of period	(78,960)
Total accumulated other comprehensive (loss) income, end of period	(76,803)
Accumulated other comprehensive (loss) income
AOCI Attributable to Parent, Net of Tax
Total accumulated other comprehensive (loss) income, beginning of period	(78,960)	(93,194)
Gain (Loss) recognized in OCI, Net	1,139	752
Gain (Loss) reclassified from AOCI to income, Net	1,018	912
Total accumulated other comprehensive (loss) income, end of period	(76,803)	(91,530)
Changes in fair market value of hedges
Changes in AOCI, Gross
Gross, beginning of the period	289	116
Other Comprehensive Income (Loss), before Reclassifications, before Tax	1,157	1,042
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(114)	150
Gross, ending balance	1,332	1,308
Changes in AOCI, Income tax (benefit)
Income tax (benefit), beginning of period	(105)	(42)
Income tax (benefit), Gain (Loss) recognized in OCI	(261)	(378)
Income tax (benefit), Gain (Loss) reclassified from AOCI to income	25	(54)
Income tax (benefit), ending of period	(341)	(474)
AOCI Attributable to Parent, Net of Tax
Total accumulated other comprehensive (loss) income, beginning of period	184	74
Gain (Loss) recognized in OCI, Net	896	664
Gain (Loss) reclassified from AOCI to income, Net	(89)	96
Total accumulated other comprehensive (loss) income, end of period	991	834
Changes in unrealized pension cost
Changes in AOCI, Gross
Gross, beginning of the period	(130,096)	(151,618)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	1,424	1,296
Gross, ending balance	(128,672)	(150,322)
Changes in AOCI, Income tax (benefit)
Income tax (benefit), beginning of period	52,837	60,672
Income tax (benefit), Gain (Loss) recognized in OCI	0	0
Income tax (benefit), Gain (Loss) reclassified from AOCI to income	(317)	(480)
Income tax (benefit), ending of period	52,520	60,192
AOCI Attributable to Parent, Net of Tax
Total accumulated other comprehensive (loss) income, beginning of period	(77,259)	(90,946)
Gain (Loss) recognized in OCI, Net	0	0
Gain (Loss) reclassified from AOCI to income, Net	1,107	816
Total accumulated other comprehensive (loss) income, end of period	(76,152)	(90,130)
Cumulative translation adjustment
Changes in AOCI, Gross
Gross, beginning of the period	(1,985)	(2,414)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	238	86
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0
Gross, ending balance	(1,747)	(2,328)
Changes in AOCI, Income tax (benefit)
Income tax (benefit), beginning of period	100	92
Income tax (benefit), Gain (Loss) recognized in OCI	5	2
Income tax (benefit), Gain (Loss) reclassified from AOCI to income	0	0
Income tax (benefit), ending of period	105	94
AOCI Attributable to Parent, Net of Tax
Total accumulated other comprehensive (loss) income, beginning of period	(1,885)	(2,322)
Gain (Loss) recognized in OCI, Net	243	88
Gain (Loss) reclassified from AOCI to income, Net	0	0
Total accumulated other comprehensive (loss) income, end of period	$ (1,642)	$ (2,234)

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Share Count and Par Value Data Related to Shareholders' Equity (Details) - $ / shares	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Preferred Stock
Preferred stock, par value per share
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares outstanding	0	0
Common Stock
Common stock, par value per share
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	56,711,792	56,632,488
Common stock, shares outstanding	33,017,770	32,938,466	32,850,719	32,762,494
Treasury stock
Treasury stock, shares held	23,694,022	23,694,022

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Common stock repurchased, shares	0	0
Common stock repurchased, value	$ 7,446
Shares are available for future issuances	$ 17,554
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	0	0
Antidilutive securities excluded from computation of earnings per share (shares)	78,317	88,592

Shareholders' Equity - Summar64

Shareholders' Equity - Summary of Common Shares Outstanding (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Roll forward of common shares outstanding
Balance at the beginning of the year	32,938,466	32,762,494
Restricted share issuances	79,304	88,225
Balance at the end of the period	33,017,770	32,850,719

Equity-Based Compensation - Sum

Equity-Based Compensation - Summary of Equity-Based Compensation Expense (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)plan$ / sharesshares	Mar. 31, 2017USD ($)shares	Dec. 31, 2017$ / sharesshares
Share-based Compensation
Number of Equity-Based Compensation Plans | plan	4
Restricted stock units	$ 923	$ 880
Allocated Share-based Compensation Expense, Net of Tax	714	549
Service-Based RSUs
Share-based Compensation
Restricted stock units	455	550
Performance and market-based RSU's
Share-based Compensation
Restricted stock units	$ 510	$ 384
Cash Settled Awards
Share-based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | shares	17,361	14,082
Restricted stock expense (reversal)	$ 42	$ (54)
RSUs
Share-based Compensation
Restricted stock units	923	880
Income tax benefit	$ 209	$ 331
Officers, key employees, and non-employee directors | Service-Based RSUs
Share-based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures | shares	515
Releasable - weighted average fair value | $ / shares	$ 12.48
Granted - shares | shares	71,722
Forfeited - weighted average fair value | $ / shares	$ 14.83
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Released Number | shares	60,797
Granted - weighted average fair value | $ / shares	$ 26.20
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares	16.36		$ 14.60
Converted - weighted average fair value | $ / shares	$ 16.43
Releasable - shares | shares	260,478
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | shares	409,757		399,347

Equity-Based Compensation - S66

Equity-Based Compensation - Summary of Equity-Based Compensation Expense related to Non-Vested RSUs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Service-Based RSUs
Share-based Compensation
Unrecognized compensation cost	$ 2,496
Weighted average period	1 year 11 months 5 days
Performance and market-based RSU's
Share-based Compensation
Unrecognized compensation cost	$ 3,874
Weighted average period	1 year 10 months 20 days
RSUs
Share-based Compensation
Unrecognized compensation cost	$ 6,370
Weighted average period	1 year 10 months 28 days

Equity-Based Compensation - S67

Equity-Based Compensation - Summary of Status of Equity-Based Compensation Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Summary of Status of Equity-Based Compensation Plans
Other accrued liabilities	$ 6,454	$ 7,367
2014 Plan
Summary of Status of Equity-Based Compensation Plans
Awards originally available	1,500,000
Shares outstanding	745,978
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	1,040,978
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Released Number	315,792
Awards available for grant	143,230
2009 Plan
Summary of Status of Equity-Based Compensation Plans
Awards originally available	3,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	122,600
Awards available for grant	0
2004 Plan
Summary of Status of Equity-Based Compensation Plans
Awards originally available	6,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	57,391
Awards available for grant	0
Directors' Plan
Summary of Status of Equity-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	9,620
Awards available for grant	0
RSUs | 2009 Plan
Summary of Status of Equity-Based Compensation Plans
Shares outstanding	122,600
RSUs | 2004 Plan
Summary of Status of Equity-Based Compensation Plans
Shares outstanding	57,391
RSUs | Directors' Plan
Summary of Status of Equity-Based Compensation Plans
Shares outstanding	9,620
Performance-Based Stock Options | 2014 Plan
Summary of Status of Equity-Based Compensation Plans
Awards originally available	350,000
Shares outstanding	295,000
Stock options outstanding	295,000
Cash Settled Awards
Summary of Status of Equity-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	17,361		14,082
Other accrued liabilities	$ 127		$ 241
Officers, key employees, and non-employee directors | Service-Based RSUs
Share-based Compensation
Releasable - weighted average fair value	$ 12.48
Summary of Status of Equity-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	409,757	399,347

Equity-Based Compensation - Per

Equity-Based Compensation - Performance-Based Stock Options (Details) - USD ($)	May 26, 2015	Mar. 31, 2018
Performance and Market-based Restricted Stock Units
Share-based Compensation
Attained by performance - weighted average fair value		$ 17.66
2014 Plan
Share-based Compensation
Awards granted (in shares)		1,500,000
2014 Plan | Performance-Based Stock Options
Share-based Compensation
Awards granted (in shares)		350,000
Grant date fair value (in dollars per share)	$ 18.37
Option term (in years)	5 years
Revenue threshold for award	$ 600,000

Equity-Based Compensation - S69

Equity-Based Compensation - Summary of Service-Based Restricted Stock Units (Details) - Officers, key employees, and non-employee directors - Service-Based RSUs	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Units
Outstanding at beginning of year - shares | shares	399,347
Granted - shares | shares	71,722
Released - shares | shares	(60,797)
Forfeited - shares | shares	(515)
Outstanding at end of year - shares | shares	409,757
Releasable - shares | shares	260,478
Weighted Average Grant Date Fair Value
Beginning of year - weighted average fair value | $ / shares	$ 14.60
Granted - weighted average fair value | $ / shares	26.20
Converted - weighted average fair value | $ / shares	16.43
Forfeited - weighted average fair value | $ / shares	14.83
End of year - weighted average fair value | $ / shares	16.36
Releasable - weighted average fair value | $ / shares	$ 12.48

Equity-Based Compensation - Dir

Equity-Based Compensation - Directors Plan (Details)	3 Months Ended
	Mar. 31, 2018shares
Directors' Plan
Units
Outstanding at end of year - shares	9,620

Equity-Based Compensation - Sch

Equity-Based Compensation - Schedule of Performance-Based RSUs (Details) - shares	Mar. 31, 2018	Feb. 16, 2018	Feb. 08, 2018	Feb. 09, 2017	Mar. 31, 2016	Feb. 16, 2016
Performance and Market-based Restricted Stock Units
Share-based Compensation
Maximum potential units outstanding at June 30, 2016 - shares	0
Performance-Based RSUs
Share-based Compensation
Target Units Outstanding		31,820	40,223	71,796	4,000	92,840
Shared Based Compensation Maximum Potential Awards		63,640	80,446	143,592	8,000	185,680
Performance Shares [Member]
Share-based Compensation
Target Units Outstanding				27,113
Shared Based Compensation Maximum Potential Awards				27,113

Equity-Based Compensation Equit

Equity-Based Compensation Equity-Based Compensation - Performance and Market Based RSUs (Details) - Performance and Market-based Restricted Stock Units	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Units
Outstanding at beginning of year - shares | shares	271,305
Granted - shares | shares	72,043
Attained by performance - shares | shares	18,600
Vested and released - shares | shares	(72,456)
Forfeited - shares | shares	(21,700)
Outstanding at end of year - shares | shares	267,792
Maximum potential units outstanding at June 30, 2016 - shares | shares	0
Weighted Average Grant Date Fair Value
Beginning of year - weighted average fair value | $ / shares	$ 18.77
Granted - weighted average fair value | $ / shares	28.75
Attained by performance - weighted average fair value | $ / shares	17.66
Vested and released - weighted average fair value | $ / shares	18.66
Forfeited - weighted average fair value | $ / shares	17.66
End of year - weighted average fair value | $ / shares	21.44
Maximum potential units outstanding at June 30, 2016 - weighted average fair value | $ / shares	$ 0

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Liability Measured at Fair Value on a Recurring Basis (Details) - Designated As Hedging - Cash Flow Hedge - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest rate swap
Recurring financial liability that was measured at carrying value
Realized gain (loss) on cash flow hedge	$ (65)	$ 0
Derivative Asset	1,294	971	$ 753
Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		742	$ 601
Realized gain (loss) on cash flow hedge	48	38
Derivative Asset	34
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap
Recurring financial liability that was measured at carrying value
Derivative liability	(1,294)	(971)
Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		742
Derivative Asset	34
Recurring | Carrying Value | Interest rate swap
Recurring financial liability that was measured at carrying value
Derivative liability	(1,294)	(971)
Recurring | Carrying Value | Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		$ 742
Derivative Asset	$ 34

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Recurring Financial Liability Related to Interest Rate Swaps (Details) - Designated As Hedging - Cash Flow Hedge - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Cost of Hedge Net of Cash Received	$ 0
Reconciliation of the recurring financial derivatives
Beginning balance, derivative asset	971	$ 753
Total gains/(losses) for the period:
Included in earnings	(65)	0
Included in other comprehensive income	388	218
Ending balance, derivative asset	1,294	971
Foreign currency hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Cost of Hedge Net of Cash Received	8	(132)
Reconciliation of the recurring financial derivatives
Beginning balance, derivative liability	742	601
Total gains/(losses) for the period:
Included in earnings	48	38
Included in other comprehensive income	720	(47)
Ending balance, derivative liability		$ 742
Ending balance, derivative asset	$ 34

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate	24.50%	30.60%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of effective income taxes rate
Effective income tax rate	24.50%	30.60%
Accrued for interest and penalties related to uncertain income tax	$ 14,000	$ 176,000
U.S. Federal Tax and Jobs Act [Member]
Income Taxes [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	$ 241

Business Combinations - Narrati

Business Combinations - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition
Cost of goods sold	$ 75,097	$ 65,930

Business Combinations - Acquisi

Business Combinations - Acquisition (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Business Acquisition
Goodwill	$ 71,057	$ 71,057

Business Combinations - Income

Business Combinations - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition
Net sales	$ 113,530	$ 100,154
Net earnings	$ 11,548	$ 8,484