Altra Industrial Motion (AIMC) 10-Q 2 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 28, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	Altra Industrial Motion Corp.
Entity Central Index Key	1,374,535
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding (in shares)		29,309,448

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 52,937	$ 69,118
Trade receivables, less allowance for doubtful accounts of $3,193 and $3,114 at March 31, 2017 and December 31, 2016, respectively	132,618	120,319
Inventories	139,444	139,840
Income tax receivable	2,714	607
Prepaid expenses and other current assets	17,448	10,429
Assets held for sale	3,907	3,874
Total current assets	349,068	344,187
Property, plant and equipment, net	178,504	177,043
Intangible assets, net	153,373	154,683
Goodwill	192,861	188,841
Deferred income taxes	1,333	2,510
Other non-current assets, net	2,389	2,560
Total assets	877,528	869,824
Current liabilities:
Accounts payable	60,942	60,845
Accrued payroll	24,010	31,302
Accruals and other current liabilities	35,882	35,080
Income tax payable	6,992	706
Current portion of long-term debt	340	43,690
Total current liabilities	128,166	171,623
Long-term debt - less current portion and net of unaccreted discount	317,649	325,969
Deferred income taxes	52,767	61,084
Pension liabilities	24,474	23,691
Other long-term liabilities	7,025	4,109
Stockholders’ equity:
Common stock ($0.001 par value, 90,000,000 shares authorized, 28,985,171 and 27,206,162 issued and outstanding at March 31, 2017 and December 31, 2016, respectively)	29	27
Additional paid-in capital	221,736	168,299
Retained earnings	197,038	191,108
Accumulated other comprehensive loss	(71,356)	(76,086)
Total stockholders’ equity	347,447	283,348
Total liabilities, and stockholders’ equity	$ 877,528	$ 869,824

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,193	$ 3,114
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	28,985,171	27,206,162
Common stock, shares outstanding (in shares)	28,985,171	27,206,162

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 215,435	$ 180,453
Cost of sales	149,268	125,823
Gross profit	66,167	54,630
Operating expenses:
Selling, general and administrative expenses	40,384	33,536
Research and development expenses	6,223	4,564
Restructuring costs	1,898	1,553
Total operating expenses	48,505	39,653
Income from operations	17,662	14,977
Other non-operating income and expense:
Interest expense, net	1,705	2,896
Other non-operating income, net	(530)	(278)
Loss on extinguishment of convertible debt	1,797
Total other non-operating (income) expense, net	2,972	2,618
Income before income taxes	14,690	12,359
Provision for income taxes	4,364	3,549
Net income	$ 10,326	$ 8,810
Weighted average shares, basic	28,763	25,740
Weighted average shares, diluted	28,897	25,759
Net income per share:
Basic net income	$ 0.36	$ 0.34
Diluted net income	0.36	0.34
Cash dividend declared	$ 0.15	$ 0.15

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 10,326	$ 8,810
Other Comprehensive income:
Foreign currency translation adjustment	3,912	4,189
Change in fair value of derivative financial instruments, net of tax	818	0
Other comprehensive loss	4,730	4,189
Comprehensive income	$ 15,056	$ 12,999

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net Income	$ 10,326	$ 8,810
Adjustments to reconcile net income to net cash flows:
Depreciation	6,461	5,119
Amortization of intangible assets	2,345	2,119
Amortization of deferred financing costs	149	196
Loss/(Gain) on foreign currency, net	(144)	217
Accretion of debt discount, net		968
(Gain)/Loss on disposal / impairment of fixed assets	(58)	448
Loss on extinguishment of convertible debt	1,797
Stock based compensation	1,751	1,163
Amortization of inventory fair value adjustment	2,347
Changes in assets and liabilities:
Trade receivables	(11,348)	(8,087)
Inventories	(1,365)	2,929
Accounts payable and accrued liabilities	(6,997)	(6,832)
Other current assets and liabilities	(4,052)	(1,311)
Other operating assets and liabilities	1,810	311
Net cash provided by operating activities	3,022	6,050
Cash flows from investing activities
Purchase of property, plant and equipment	(7,333)	(5,653)
Net cash used in investing activities	(7,333)	(5,653)
Cash flows from financing activities
Payments on 2015 Revolving Credit Facility	(13,459)	(4,447)
Dividend payments	(3,904)
Borrowing under 2015 Revolving Credit Facility	5,000
Payments of equipment, working capital notes, mortgages and other debt	(267)	(1,281)
Cash paid to redeem Convertible Notes	(954)
Proceeds from mortgages and other debt		3,351
Shares surrendered for tax withholding	(163)	(91)
Purchases of common stock under share repurchase program		(2,159)
Net cash used in financing activities	(13,747)	(4,627)
Effect of exchange rate changes on cash and cash equivalents	1,877	(1,247)
Net change in cash and cash equivalents	(16,181)	(5,477)
Cash and cash equivalents at beginning of year	69,118	50,320
Cash and cash equivalents at end of period	52,937	44,843
Cash paid during the period for:
Interest	1,797	2,354
Income taxes	2,937	$ 1,784
Non-cash Financing and Investing
Conversion of Convertible Notes to common stock	$ 51,851

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2015	$ 242,567	$ 26	$ 124,834	$ 181,539	$ (63,832)
Beginning balance (in shares) at Dec. 31, 2015		25,773
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock	1,072		1,072
Stock-based compensation and vesting of restricted stock (in shares)		12
Net income	8,810			8,810
Dividends declared	(3,908)			(3,908)
Change in fair value of interest rate swap, net of tax	0
Cumulative foreign currency translation adjustment	4,189				4,189
Repurchases of common stock	(2,159)		(2,159)
Repurchases of common stock (in shares)		(91)
Ending balance at Mar. 31, 2016	250,571	$ 26	123,747	186,441	(59,643)
Ending balance (in shares) at Mar. 31, 2016		25,694
Beginning balance at Dec. 31, 2016	283,348	$ 27	168,299	191,108	(76,086)
Beginning balance (in shares) at Dec. 31, 2016		27,206
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock	1,588		1,588
Stock-based compensation and vesting of restricted stock (in shares)		31
Net income	10,326			10,326
Conversion of Convertible Debt	51,851	$ 2	51,849
Conversion of Convertible Debt (in shares)		1,748
Dividends declared	(4,396)			(4,396)
Change in fair value of interest rate swap, net of tax	818				818
Cumulative foreign currency translation adjustment	3,912				3,912
Ending balance at Mar. 31, 2017	$ 347,447	$ 29	$ 221,736	$ 197,038	$ (71,356)
Ending balance (in shares) at Mar. 31, 2017		28,985

Organization and Nature of Oper

Organization and Nature of Operations	3 Months Ended
	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Nature of Operations	1. Organization and Nature of Operations Headquartered in Braintree, Massachusetts, Altra Industrial Motion Corp. (the “Company”, “we”, or “our”) is a leading multi-national designer, producer and marketer of a wide range of electro-mechanical power transmission products. The Company brings together strong brands covering over 42 product lines with production facilities in twelve countries. Altra’s leading brands include Ameridrives Couplings, Bauer Gear Motor, Bibby Turboflex, Boston Gear, Delroyd Worm Gear, Formsprag Clutch, Guardian Couplings, Huco, Industrial Clutch, Inertia Dynamics, Kilian Manufacturing, Lamiflex Couplings, Marland Clutch, Matrix, Nuttall Gear, Stieber Clutch, Stromag, Svendborg Brakes, TB Wood’s, Twiflex, Warner Electric, Warner Linear, and Wichita Clutch.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	2. Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America. These statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary to present fairly the Company’s financial position for the interim periods presented, and cash flows for the interim periods presented. The results are not necessarily indicative of future results. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure.

Recent Accounting Standards

Recent Accounting Standards	3 Months Ended
	Mar. 31, 2017
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Standards	3. Recent Accounting Standards In October 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In August 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230): Classification of certain cash receipts and cash payments (a consensus of the emerging issues task force) In February 2015, the FASB issued ASU 2016-02, Leases (Topic 842) In May 2014, the FASB issued ASU No. 2014-09 Revenue from Contracts with Customers Recently Adopted Accounting Standards In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory Under this guidance, entities utilizing the first-in-first-out (“FIFO”) or average cost method should measure inventory at the lower of cost or net realizable value, whereas net realizable value is defined as the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The Company adopted this guidance on January 1, 2017. The adoption of this ASU did not have a material impact to our Condensed Consolidated Financial Statements.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	4. Fair Value of Financial Instruments Fair value is determined based upon the exit price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants, as determined by either the principal market or the most advantageous market. Inputs used in the valuation techniques to derive fair values are classified based on a three-level hierarchy, as follows: • Level 1- Quoted prices in active markets for identical assets or liabilities. • Level 2- Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived, • Level 3- Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities. The Company considers all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents. The carrying values of financial instruments, including accounts receivable, cash equivalents, accounts payable, and other accrued liabilities approximate fair value. Debt under the Company’s 2015 Credit Agreement approximates the fair value due to the variable rate nature at current market rates. The Company determines the fair value of financial instruments using quoted market prices whenever available. When quoted market prices are not available for various types of financial instruments (such as forwards, options and swaps), the Company uses standard models with market-based inputs, which take into account the present value of estimated future cash flows and the ability of the Company or the financial counterparty to perform. For interest rate and cross currency swaps, the significant inputs to these models are interest rate curves for discounting future cash flows and are adjusted for credit risk. For forward foreign currency contracts, the significant inputs are interest rate curves for discounting future cash flows, and exchange rate curves of the foreign currency for translating future cash flows. See additional discussion of the Company’s use of financial instruments including a cross-currency swap included in Note 15

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Loss by Component	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component	5. Changes in Accumulated Other Comprehensive Loss by Component The following is a reconciliation of changes in accumulated other comprehensive loss by component for the periods presented: Gains and Losses on Cash Flow Hedges Defined Benefit Pension Plans Cumulative Foreign Currency Translation Adjustment Total Accumulated Other Comprehensive Loss by Component, January 1, 2017 $ (646 ) $ (5,668 ) $ (69,772 ) $ (76,086 ) Net current-period Other Comprehensive Income (Loss) 818 (234 ) 4,146 4,730 Accumulated Other Comprehensive Income (Loss) by Component, March 31, 2017 $ 172 $ (5,902 ) $ (65,626 ) $ (71,356 ) Gains and Losses on Cash Flow Hedges Defined Benefit Pension Plans Cumulative Foreign Currency Translation Adjustment Total Accumulated Other Comprehensive Loss by Component, January 1, 2016 $ (140 ) $ (5,807 ) $ (57,885 ) $ (63,832 ) Net current-period Other Comprehensive Income — 110 4,079 4,189 Accumulated Other Comprehensive Loss by Component, March 31, 2016 $ (140 ) $ (5,697 ) $ (53,806 ) $ (59,643 )

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	6. Acquisitions On December 30, 2016, we acquired the shares and certain assets and liabilities of the Stromag business from GKN plc., and as a result, the Company’s condensed consolidated financial statements reflect Stromag’s results of operations from the beginning of business on December 30, 2016 forward. Stromag is a leading global manufacturer of highly engineered clutches and brakes, couplings, and limit switches for use in a variety of end markets including renewable energy, crane & hoist, and marine. We refer to this transaction as the Stromag Acquisition. As of March 31, 2017, the allocation of the purchase price for the Stromag Acquisition is preliminary. The fair value of all the acquired identifiable assets and liabilities is provisional pending finalization of the Company’s acquisition accounting. The Company believes that such preliminary allocations provide a reasonable basis for estimating the fair values of assets acquired and liabilities assumed, but the Company is waiting for additional information necessary to finalize fair value. The Company recorded certain immaterial measurement period adjustments during the quarter ended March 31, 2017. The preliminary purchase price allocations include such adjustments. Preliminary Purchase Price Allocation Total purchase price, excluding acquisition costs of approximately $2.9 million $ 194,736 Cash and cash equivalents 8,758 Trade receivables 24,014 Inventories 23,558 Property, plant and equipment 40,343 Intangible assets 74,795 Prepaid expenses and other current assets 778 Total assets acquired $ 172,246 Accounts payable (15,370 ) Accrued payroll (7,171 ) Accrued expenses and other current liabilities (4,357 ) Income tax payable (2,525 ) Deferred tax liability (26,880 ) Other long-term liabilities (1,255 ) Pension liability (15,283 ) Total liabilities assumed $ (72,841 ) Net assets acquired 99,406 Excess purchase price over fair value of net assets acquired $ 95,330 The excess of the purchase price over the fair value of the net assets acquired was recorded as goodwill. This goodwill is not deductible for income tax purposes. The Company expects to develop synergies, such as lower cost country sourcing, global procurement, the ability to cross-sell product, and the ability to penetrate certain geographic areas, as a result of the acquisition of Stromag. Intangible assets acquired consist of: Customer relationships $ 56,019 Trade names and trademarks 18,776 Total intangible assets $ 74,795 Customer relationships are subject to amortization which will be amortized on a straight-line basis over their estimated useful lives of 15 years, which represents the anticipated period over which the Company estimates it will benefit from the acquired assets. The following table sets forth the unaudited pro forma results of operations of the Company for the quarter to date period ended March 31, 2016, as if the Company had acquired Stromag at the beginning of the period. The pro forma information contains the actual operating results of the Company, including Stromag, adjusted to include the pro forma impact of (i) additional depreciation expense as a result of estimated depreciation based on the fair value of fixed assets and; (ii) additional expense as a result of the estimated amortization of identifiable intangible assets; (iii) additional interest expense for borrowings under the Credit Agreement associated with the Stromag Acquisition. These pro forma amounts do not purport to be indicative of the results that would have actually been obtained if the acquisition occurred at the beginning of the period or that may be obtained in the future. Proforma (unaudited) Quarter Ended March 31, 2016 Total revenues $ 216,876 Net income $ 10,887 Basic earnings per share $ 0.42 Diluted earnings per share $ 0.42

Net Income per Share

Net Income per Share	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Net Income per Share	7. Net Income per Share Basic earnings per share is based on the weighted average number of shares of common stock outstanding, and diluted earnings per share is based on the weighted average number of shares of common stock outstanding and all potentially dilutive common stock equivalents outstanding. Common stock equivalents are included in the per share calculations when the effect of their inclusion is dilutive. The following is a reconciliation of basic to diluted net income per share: Quarter Ended March 31, 2017 March 31, 2016 Net income $ 10,326 $ 8,810 Shares used in net income per common share - basic 28,763 25,740 Incremental shares of unvested restricted common stock 134 19 Shares used in net income per common share - diluted 28,897 25,759 Earnings per share: Basic net income $ 0.36 $ 0.34 Diluted net income $ 0.36 $ 0.34

Inventories

Inventories	3 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventories	8. Inventories Inventories at March 31, 2017 and December 31, 2016 consisted of the following: March 31, 2017 December 31, 2016 Raw materials $ 44,623 $ 45,507 Work in process 21,933 20,128 Finished goods 72,888 74,205 $ 139,444 $ 139,840

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9. Goodwill and Intangible Assets Changes in goodwill from January 1, 2017 through March 31, 2017 were as follows: Couplings, Clutches & Brakes Electromagnetic Clutches & Brakes Gearing Total Net goodwill balance January 1, 2017 $ 104,465 $ 37,161 $ 47,215 $ 188,841 Measurement period adjustment related to acquisition of Stromag (See Note 6) $ 1,865 $ 340 $ - 2,205 Impact of changes in foreign currency and other 1,596 114 105 1,815 Net goodwill balance March 31, 2017 $ 107,926 $ 37,615 $ 47,320 $ 192,861 Other intangible assets as of March 31, 2017 and December 31, 2016 consisted of the following: March 31, 2017 December 31, 2016 Cost Accumulated Amortization Net Cost Accumulated Amortization Net Other intangible assets Intangible assets not subject to amortization: Tradenames and trademarks $ 50,910 $ — $ 50,910 $ 50,416 $ — $ 50,416 Intangible assets subject to amortization: Customer relationships 165,243 63,378 $ 101,865 164,406 60,761 103,645 Product technology and patents 6,450 5,852 $ 598 6,090 5,468 622 Total intangible assets $ 222,603 $ 69,230 $ 153,373 $ 220,912 $ 66,229 $ 154,683 The Company recorded $2.3 million and $2.1 million of amortization expense in the quarters ended March 31, 2017 and 2016, respectively. The estimated amortization expense for intangible assets is approximately $6.7 million for the remainder of 2017, $9.6 million in each of the next four years and then $57.6 million thereafter.

Warranty Costs

Warranty Costs	3 Months Ended
	Mar. 31, 2017
Guarantees [Abstract]
Warranty Costs	10. Warranty Costs The contractual warranty period of the Company's products generally ranges from three months to two years with certain warranties extending for longer periods. Estimated expenses related to product warranties are accrued at the time products are sold to customers and are recorded in accruals and other current liabilities on the unaudited condensed consolidated balance sheet. Estimates are established using historical information as to the nature, frequency and average costs of warranty claims. Changes in the carrying amount of accrued product warranty costs for each of the quarters ended March 31, 2017 and March 31, 2016 are as follows: March 31, 2017 March 31, 2016 Balance at beginning of period $ 9,158 $ 9,468 Accrued current period warranty expense 122 133 Payments and adjustments (110 ) (104 ) Balance at end of period $ 9,170 $ 9,497

Debt

Debt	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt	11. Debt Outstanding debt obligations at March 31, 2017 and December 31, 2016 were as follows. March 31, 2017 December 31, 2016 Debt: Revolving Credit Facility $ 305,407 $ 313,620 Convertible Notes — 45,656 Mortgages 12,269 12,755 Capital leases 313 363 Total debt 317,989 372,394 Less: debt discount, net of accretion — (2,735 ) Total debt, net of unaccreted discount $ 317,989 $ 369,659 Less current portion of long-term debt (340 ) (43,690 ) Total long-term debt, net of unaccreted discount $ 317,649 $ 325,969 Second Amended and Restated Credit Agreement On October 22, 2015, the Company entered into a Second Amended and Restated Credit Agreement, which may be amended from time to time (the “2015 Credit Agreement”). Under the 2015 Credit Agreement, the amount of the Company’s prior revolving credit facility was increased to $350 million (the “2015 Revolving Credit Facility”). The amounts available under the 2015 Revolving Credit Facility can be used for general corporate purposes, including acquisitions, and to repay existing indebtedness. The stated maturity of the 2015 Revolving Credit Facility is October 22, 2020. The amounts available under the 2015 Revolving Credit Facility may be drawn upon in accordance with the terms of the 2015 Credit Agreement. All amounts outstanding under the 2015 Revolving Credit Facility are due on the stated maturity or such earlier time, if any, required under the 2015 Credit Agreement. The amounts owed under the 2015 Revolving Credit Facility may be prepaid at any time, subject to usual notification and breakage payment provisions. Interest on the amounts outstanding under the 2015 Revolving Credit Facility is calculated using either an ABR Rate or Eurodollar Rate, plus the applicable margin. The applicable margins for Eurodollar Loans are between 1.25% to 2.00%, and for ABR Loans are between 0.25% and 1.00%. The amounts of the margins are calculated based on either a consolidated total net leverage ratio (as defined in the 2015 Credit Agreement), or the then applicable rating(s) of the Company’s debt and then to the extent as provided in the 2015 Credit Agreement. The rate at December 31, 2015 was 1.5%. A portion of the 2015 Revolving Credit Facility may also be used for the issuance of letters of credit, and a portion of the amount of the 2015 Revolving Credit Facility is available for borrowings in certain agreed upon foreign currencies. The 2015 Credit Agreement contains various affirmative and negative covenants and restrictions, which among other things, will require the Borrowers to provide certain financial reports to the Lenders, require the Company to maintain certain financial covenants relating to consolidated leverage and interest coverage, limit maximum annual capital expenditures, and limit the ability of the Company and its subsidiaries to incur or guarantee additional indebtedness, pay dividends or make other equity distributions, purchase or redeem capital stock or debt, make certain investments, sell assets, engage in certain transactions, and effect a consolidation or merger. The 2015 Credit Agreement also contains customary events of default. On October 21, 2016, the Company entered into an agreement to amend the 2015 Credit Agreement. This amendment, which became effective upon closing of the purchase of Stromag, which was December 30, 2016, increased the 2015 Revolving Credit Facility by $75 million to $425 million. The Company used additional borrowings under the increased facility to finance its purchase of Stromag. In addition, the amendment increased the multicurrency sublimit to $250 million and adjusted certain financial covenants. The pricing terms and maturity date under the 2015 Credit Agreement remain unchanged. The Company paid $0.6 million in fees in connection with the October 2016 amendment, which is recorded in other non-current assets. As of March 31, 2017 we had $305.4 million outstanding on our 2015 Revolving Credit Facility, including $297.9 million outstanding on our USD tranche at an interest rate of 2.54% and $7.5 million outstanding on our Euro tranche at an interest rate of 1.75%. As of March 31, 2017 and December 31, 2016, we had $4.5 million and $4.1 million in letters of credit outstanding, respectively. We had $115.1 million available to borrow under the 2015 Revolving Credit Facility at March 31, 2017 and may borrow an additional $150 million under certain circumstances. Convertible Senior Notes In March 2011, the Company issued Convertible Senior Notes (the “Convertible Notes”) due March 1, 2031. The Convertible Notes were guaranteed by the Company’s U.S. domestic subsidiaries. Interest on the Convertible Notes was payable semi-annually in arrears, on March 1 and September 1 of each year, commencing on September 1, 2011 at an annual rate of 2.75%. Proceeds from the offering were $81.3 million, net of fees and expenses that were capitalized. On December 12, 2016 the Company gave notice to the holders of the Convertible Notes of its intention to redeem all of the Convertible Notes outstanding on January 12, 2017 (the “Redemption Date”), pursuant to the optional redemption provisions in the Indenture. The redemption price for the Convertible Notes was 100% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the Redemption Date plus a Make-Whole Premium equal to the present values of the remaining scheduled payments of interest on any Convertible Notes through March 1, 2018 (excluding interest accrued to, but excluding, the Redemption Date). In lieu of receiving the redemption price, holders of the Notes could surrender their Convertible Notes for conversion at any time before January 9, 2017. The conversion rate of the Convertible Notes was 39.0809 shares of the Company’s common stock, for each $1,000 of outstanding principal of the Convertible Notes. As of December 31, 2016, Convertible Notes with an outstanding principal of approximately $39.3 million were converted resulting in the issuance of 1.5 million shares of the Company’s common stock. As a result of the conversion, the Company incurred a loss on extinguishment of debt of approximately $1.9 million and the carrying value of the Convertible Notes was $42.9 million as of December 31, 2016. In January 2017, additional Convertible Notes with an outstanding principal of approximately $44.7 million were converted resulting in the issuance of 1.7 million shares of the Company’s common stock, and $0.9 million of Convertible Notes were redeemed for cash. The Company incurred an additional loss on extinguishment of debt of approximately $1.8 million during the quarter ended March 31, 2017. All Convertible Notes were converted or redeemed as of January 12, 2017. Mortgages Heidelberg Germany During 2015, a foreign subsidiary of the Company entered into a mortgage with a bank for €1.5 million, or $1.7 million, secured by its facility in Heidelberg, Germany to replace its previously existing mortgage. The mortgage has an interest rate of 1.79%, which is payable in monthly installments through August 2023. The mortgage has a remaining principal balance of € 1.3 million, or $1.4 million, at March 31, 2017. Esslingen Germany During 2015, a foreign subsidiary of the Company entered into a mortgage with a bank for €6.0 million, or $6.7 million, secured by its facility in Esslingen, Germany. The mortgage has an interest rate of 2.5% per year, which is payable in annual interest payments of €0.1 million, or $0.1 million, to be paid in monthly installments. The mortgage had a remaining principal balance of €6.0 million, or $6.3 million, at March 31, 2017. The principal portion of the mortgage will be due in a lump-sum payment in May 2019. During the quarter ended March 31, 2016, a foreign subsidiary of the Company entered in to a loan with a bank to equip its facility in Zlate Moravce, Slovakia. As of March 31, 2017, the total principal outstanding was €2.7 million, or $2.5 million, and is guaranteed by land security at its parent company facility in Esslingen, Germany. The loan is due in installments from 2016 through 2020, with an interest rate of 1.95%. Angers France During 2015, a foreign subsidiary of the Company entered into a mortgage with a bank for €2.1 million, or $2.3 million, secured by its facility in in Angers, France. The mortgage has an interest rate of 1.85% per year which is payable in monthly installments from June 2016 until May 2025. The mortgage had a balance of €1.9 million, or $2.0 million, at March 31, 2017. Capital Leases The Company leases certain equipment under capital lease arrangements, whose obligations are included in both short-term and long-term debt. Capital lease obligations amounted to approximately $0.3 million at March 31, 2017 and approximately $0.4 million at December 31, 2016. Assets subject to capital leases are included in property, plant and equipment with the related amortization recorded as depreciation expense. Overdraft Agreements Certain of our foreign subsidiaries maintain overdraft agreements with financial institutions. There were no borrowings as of March 31, 2017 or December 31, 2016 under any of the overdraft agreements.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2017
Stockholders Equity Note [Abstract]
Stockholders' Equity	12. Stockholders’ Equity Stock-Based Compensation The Company’s 2004 Equity Incentive Plan (the “2004 Plan”) permitted the grant of various forms of stock based compensation to our officers and senior level employees. The 2004 Plan expired in 2014 and, upon expiration, there were 750,576 shares subject to outstanding awards under the 2004 Plan. The 2014 Omnibus Incentive Plan (the “2014 Plan”) was approved by the Company’s shareholders at its 2014 annual meeting. The 2014 Plan provides for various forms of stock based compensation to our directors, executive personnel and other key employees and consultants. Under the 2014 Plan, the total number of shares of common stock available for delivery pursuant to the grant of awards (“Awards”) was originally 750,000. Shares of our common stock subject to Awards awarded under the 2004 Plan and outstanding as of the effective date of the 2014 Plan (except for substitute awards) that terminate without being exercised, expire, are forfeited or canceled, are exchanged for Awards that did not involve shares of common stock, are not issued on the stock settlement of a stock appreciation right, are withheld by the Company or tendered by a participant (either actually or by attestation) to pay an option exercise price or to pay the withholding tax on any Award, or are settled in cash in lieu of shares will again be available for Awards under the 2014 Plan. The restricted shares issued pursuant to the 2014 Plan generally vest ratably over a period ranging from immediately to five years from the date of grant, provided, that the vesting of the restricted shares may accelerate upon the occurrence of certain events. Common stock awarded under the 2014 Plan is generally subject to restrictions on transfer, repurchase rights, and other limitations and rights as set forth in the applicable award agreements. The fair value of the shares repurchased are measured based on the share price on the date of grant. The 2014 Plan permits the Company to grant, among other things, restricted stock, restricted stock units, and performance share awards to key employees and other persons who make significant contributions to the success of the Company. The restrictions and vesting schedule for restricted stock granted under the 2014 Plan are determined by the Personnel and Compensation Committee of the Board of Directors. Stock-based compensation expense recorded during the quarters ended March 31, 2017 and March 31, 2016, was $1.8 million and $1.2 million, respectively. The Company recognizes stock-based compensation expense on a straight-line basis for the shares vesting ratably under the plan and uses the graded-vesting method of recognizing stock-based compensation expense for the performance share awards based on the probability of the specific performance metrics being achieved over the requisite service period. The following table sets forth the activity of the Company’s restricted stock and performance share grants in the quarter ended March 31, 2017: Shares Weighted-average grant date fair value Shares unvested January 1, 2017 199,712 $ 24.68 Shares granted 142,304 39.19 Shares for which restrictions lapsed (19,504 ) 38.59 Shares unvested March 31, 2017 322,512 $ 30.83 Total remaining unrecognized compensation cost was $6.3 million as of March 31, 2017, which will be recognized over a weighted average remaining period of 3 years. The fair market value of the shares for which the restrictions have lapsed during the quarter ended March 31, 2017 was $0.8 million. Restricted shares granted are valued based on the fair market value of the stock on the date of grant. Share Repurchase Program In May 2014, our board of directors approved a share repurchase program (the “2014 Program”) authorizing the buyback of up to $50.0 million of the Company’s common stock. Under the 2014 program, the Company was authorized to purchase shares on the open market, through block trades, in privately negotiated transactions, in compliance with SEC Rule 10b-18 (including through Rule 10b5-1 plans), or in any other appropriate manner. The timing of the shares repurchased was at the discretion of management and depended on a number of factors, including price, market conditions and regulatory requirements. Shares acquired through the repurchase program were retired. On October 19, 2016, our board of directors approved a new share repurchase program authorizing the buyback of up to $30.0 million of the Company's common stock through December 31, 2019. This plan replaces the 2014 Program which was terminated. The Company expects to purchase shares on the open market, through block trades, in privately negotiated transactions, in compliance with SEC Rule 10b-18 (including through Rule 10b5-1 plans), or in any other appropriate manner. The timing of the shares repurchased will be at the discretion of management and will depend on a number of factors, including price, market conditions and regulatory requirements. Shares acquired through the repurchase program will be retired. The Company retains the right to limit, terminate or extend the share repurchase program at any time without prior notice. The Company expects to fund any further repurchases of its common stock through a combination of cash on hand and cash generated by operations. During the quarter ended March 31, 2017, the Company did not repurchase any of its common stock under the share repurchase program. Dividends The Company declared a dividend of $0.15 per share of common stock related to the quarter ended March 31, 2017. The dividend for the quarter ended March 31, 2017 was accrued in the balance sheet at March 31, 2017. Future declarations of quarterly cash dividends are subject to approval by the Board of Directors and to the Board’s continuing determination that the declaration of dividends are in the best interest of the Company’s stockholders and are in compliance with all laws and agreements of the Company applicable to the declaration and payment of cash dividends.

Restructuring, Asset Impairment

Restructuring, Asset Impairment, and Transition Expenses	3 Months Ended
	Mar. 31, 2017
Restructuring And Related Activities [Abstract]
Restructuring, Asset Impairment, and Transition Expenses	13. Restructuring, Asset Impairment, and Transition Expenses From time to time, the Company has initiated various restructuring programs and incurred severance and other restructuring costs. In the quarter ended March 31, 2015, the Company commenced a restructuring plan (“2015 Altra Plan”) as a result of weak demand in Europe and to make certain adjustments to improve business effectiveness, reduce the number of facilities and streamline the Company's cost structure. The actions taken pursuant to the 2015 Altra Plan included reducing headcount, facility consolidations and related asset impairments, and limiting discretionary spending to improve profitability. The following table details restructuring charges incurred by segment for the periods presented. Quarter Ended March 31, 2017 March 31, 2016 Couplings, Clutches & Brakes $ 1,361 $ 404 Electromagnetic Clutches & Brakes — 673 Gearing 296 16 Corporate (1) 241 460 Total $ 1,898 $ 1,553 (1) Certain expenses are maintained at the corporate level and not allocated to the segments. These include various administrative expenses related to corporate headquarters, depreciation on capitalized software costs, non-capitalizable software implementation costs and acquisition related expenses and non-cash partial pension settlements. The amounts for the quarter ended March 31, 2017 were comprised of approximately $0.1 million in severance, $0.7 million in consolidation costs, $0.7 million in moving and relocation costs, and $0.4 million in travel-related and other restructuring costs. The amounts for the quarter ended March 31, 2016 were comprised of approximately $1.0 million in severance, $0.2 million in building impairments, and $0.3 million in other restructuring costs, and are classified in the accompanying unaudited condensed consolidated statement of income as restructuring costs. The following is a reconciliation of the accrued restructuring costs between January 1, 2017 and March 31, 2017. All Plans Balance at January 1, 2017 $ 1,971 Restructuring expense incurred 1,898 Cash payments (2,472 ) Balance at March 31, 2017 $ 1,397 The total accrued restructuring reserve as of March 31, 2017 relates to severance costs to be paid to former employees which are expected to be paid during 2017 and are recorded in accruals and other current liabilities on the accompanying unaudited condensed consolidated balance sheet. The Company expects to incur between approximately $1.0 and $3.5 million in additional restructuring expenses between 2017 and 2018 under the 2015 Altra Plan, primarily in the Couplings, Clutches & Brakes and Gearing business segments.

Segments, Concentrations and Ge

Segments, Concentrations and Geographic Information	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Segments, Concentrations and Geographic Information	14. Segments, Concentrations and Geographic Information Segments The Company currently operates through three business segments that are aligned with key product types and end markets served: • Couplings, Clutches & Brakes. Couplings are the interface between two shafts, which enable power to be transmitted from one shaft to the other. Clutches in this segment are devices which use mechanical, hydraulic, pneumatic, or friction type connections to facilitate engaging or disengaging two rotating members. Brakes are combinations of interacting parts that work to slow or stop machinery. Products in this segment are generally used in heavy industrial applications and energy markets. • Electromagnetic Clutches & Brakes. Products in this segment include brakes and clutches that are used to electronically slow, stop, engage or disengage equipment utilizing electromagnetic friction type connections. Products in this segment are used in industrial and commercial markets including agricultural machinery, material handling, motion control, and turf & garden. • Gearing. Gears are utilized to reduce the speed and increase the torque of an electric motor or engine to the level required to drive a particular piece of equipment. Gears produced by the Company are primarily utilized in industrial applications. Segment financial information and a reconciliation of segment results to consolidated results follows: Quarter Ended March 31, 2017 2016 Net Sales: Couplings, Clutches & Brakes $ 106,232 $ 75,623 Electromagnetic Clutches & Brakes 63,878 57,349 Gearing 47,028 48,920 Inter-segment eliminations (1,703 ) (1,439 ) Net sales $ 215,435 $ 180,453 Income from operations: Segment earnings: Couplings, Clutches & Brakes $ 8,345 $ 6,291 Electromagnetic Clutches & Brakes 7,593 6,463 Gearing 5,525 5,762 Restructuring (1,898 ) (1,553 ) Corporate expenses (1) (1,903 ) (1,986 ) Income from operations $ 17,662 $ 14,977 Other non-operating (income) expense: Net interest expense $ 1,705 $ 2,896 Other non-operating expense (income), net (530 ) (278 ) Loss on extinguishment of convertible debt 1,797 - 2,972 2,618 Income before income taxes 14,690 12,359 Provision for income taxes 4,364 3,549 Net income $ 10,326 $ 8,810 (1) Certain expenses are maintained at the corporate level and not allocated to the segments. These include various administrative expenses related to corporate headquarters, depreciation on capitalized software costs, non-capitalizable software implementation costs and acquisition related expenses and non-cash partial pension settlements. Selected information by segment (continued) Quarter Ended March 31, 2017 March 31, 2016 Depreciation and amortization: Couplings, Clutches & Brakes $ 5,137 $ 3,688 Electromagnetic Clutches & Brakes 1,215 1,148 Gearing 1,651 1,671 Corporate 803 731 Total depreciation and amortization $ 8,806 $ 7,238 March 31, 2017 March 31, 2016 Total assets: Couplings, Clutches & Brakes $ 541,343 $ 333,595 Electromagnetic Clutches & Brakes 176,167 130,038 Gearing 132,971 135,231 Corporate (2) 27,047 37,066 Total assets $ 877,528 $ 635,930 (2) Corporate assets are primarily cash and cash equivalents, tax related asset accounts, certain capitalized software costs, property, plant and equipment and deferred financing costs. Net sales to third parties by geographic region are as follows: Net Sales Quarter Ended March 31, 2017 March 31, 2016 North America (primarily U.S.) $ 115,140 $ 112,183 Europe 83,294 52,113 Asia and other 17,001 16,157 Total $ 215,435 $ 180,453 Net sales to third parties are attributed to the geographic regions based on the country in which the shipment originates. Amounts attributed to the geographic regions for property, plant and equipment are based on the location of the entity which holds such assets. Concentrations Financial instruments, which are potentially subject to counter party performance and concentrations of credit risk, consist primarily of trade accounts receivable. The Company manages these risks by conducting credit evaluations of customers prior to delivery or commencement of services. When the Company enters into a sales contract, collateral is normally not required from the customer. Payments are typically due within 30 days of billing. An allowance for potential credit losses is maintained, and losses have historically been within management’s expectations. While the Company did not have any customers that represented total sales greater than 10% for each of the quarters ended March 31, 2017 and 2016, the Gearing business had one customer that approximated 10% of total sales for that segment during the quarter ended March 31, 2017. The Company is also subject to counter party performance risk of loss in the event of non-performance by counterparties to financial instruments, such as cash and investments. Cash and cash equivalents are held by well-established financial institutions and invested in AAA rated mutual funds. The Company is exposed to swap counterparty credit risk with well-established financial institutions.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	15. Derivative Financial Instruments The Company enters into contractual derivative arrangements to manage changes in market conditions related to interest on debt obligations, and foreign currency exposures. Derivative instruments utilized during the period include interest rate swap agreements and foreign currency contracts. All derivative instruments are recognized as either assets or liabilities on the balance sheet at fair value at the end of each period. The counterparties to the Company's contractual derivative agreements are all major international financial institutions. The Company is exposed to credit loss in the event of nonperformance by these counterparties. The Company continually monitors its positions and the credit ratings of its counterparties, and does not anticipate nonperformance by the counterparties. For designated hedging relationships, the Company formally documents the hedging relationship and its risk management objective and strategy for undertaking the hedge, the hedging instrument, the hedged item, the nature of the risk being hedged, how the hedging instrument's effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method of measuring ineffectiveness. The Company also formally assesses, both at the hedge's inception and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting cash flows of hedged items. Cross Currency Interest Rate Swaps The Company is exposed to foreign currency and interest rate cash flow exposure related to non-functional currency long-term debt of the Company’s wholly owned Dutch subsidiary. To manage this foreign currency and interest rate cash flow exposure, the Company entered into a cross-currency interest rate swap that converts $100.0 million of U.S. dollar denominated floating interest payments to functional currency (euro) fixed interest payments during the life of the hedging instrument. In addition, the Company entered into two cross-currency interest rate swaps that convert an additional $70.0 million of the U.S. dollar denominated floating interest payments to functional currency (euro) floating interest payments during the life of the hedging instruments. As changes in foreign exchange and interest rates impact the future cash flow of interest payments, the hedges are intended to offset changes in cash flows attributable to interest rate and foreign exchange movements. The Company designated the $100.0 million swap as a cash flow hedge, with the effective portion of the gain or loss on the derivative reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction impacts earnings. There were no amounts recorded for ineffectiveness for the periods reported herein related to the cross-currency interest rate swaps. Changes in the fair value of the derivatives that are not designated as a cash flow hedge are recorded in other operating (income) expense, net. Changes in the fair value of a derivative that is designated as and meets all the required criteria for a cash flow hedge are recorded in accumulated other comprehensive income and reclassified into earnings as the underlying hedged item affects earnings. As of March 31, 2017, approximately $0.1 million of net unrealized gains related to the cross-currency interest rate swaps were included in accumulated other comprehensive income (loss). Interest Rate Swap In January 2017, the Company entered into an interest rate swap agreement designed to fix the variable interest rate payable on a portion of its outstanding borrowings under the 2015 Credit Agreement, for a notional value of $50.0 million, at 1.625%. The effective date was January 31, 2017 and the maturity date is January 31, 2020. The interest rate swap agreement was designed to manage exposure to interest rates on the Company’s variable rate indebtedness. The Company recognizes all derivatives on its balance sheet at fair value. The Company has designated this interest rate swap agreement as a cash flow hedge. Changes in the fair value of the swap will be recognized in other comprehensive income until the hedged items are recognized in earnings. Hedge ineffectiveness, if any, associated with the swap will be reported by the Company in interest expense. As of March 31, 2017, approximately $10 thousand of unrealized gain related to the interest rate swap was included in accumulated other comprehensive income (loss). The following table summarizes outstanding swaps which the Company has recorded at March 31, 2017. Initial US$ Date Derivative Notional Entered Financial Amount Floating Leg Floating Leg Settlement Effective into Instrument (thousands) (swap counterparty) Fixed Rate (Company) Dates Period of swap 12/21/2016 Cross currency interest rate swap $ 100,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter 1.027% EUR N/A Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 12/31/2019 12/21/2016 Cross currency interest rate swap 40,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter N/A Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.920% Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 12/31/2018 12/21/2016 Cross currency interest rate swap 30,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter N/A Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.721% Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 6/30/2017 1/31/2017 Interest rate swap 50,000 Variable rate 1-month USD Libor 1.625% USD N/A Monthly on the last banking day of each month commencing February 28, 2017 1/31/2017 - 1/31/2020 The following table summarizes the location and fair value, using Level 2 inputs (see Note 4 for a description of the fair value levels), of the Company's derivatives designated and not designated as hedging instruments in the Condensed Consolidated Balance Sheets (in thousands). March 31, December, Balance Sheet Location 2017 2016 Designated as hedging instruments: Cross currency swap agreements Other long-term liabilities $ 2,355 $ 1,642 Interest rate swap agreement Other long-term assets 10 - Not designated as hedging instruments: Cross currency swap agreements Other long-term liabilities 1,672 889 $ 4,017 $ 2,531 The following table summarizes the location of (gain) loss reclassified from Accumulated other comprehensive loss into earnings for derivatives designated as hedging instruments and the location of (gain) loss for our derivatives not designated as hedging instruments in the Consolidated Statements of Income (in thousands). March, 31 Income Statement Location 2017 Designated as hedging instruments: Cross currency swap agreements Other non-operating (income) expense, net $ 1,521 Not designated as hedging instruments: Cross currency swap agreements Other non-operating (income) expense, net 783 $ 2,304

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	16. Commitments and Contingencies General Litigation The Company is involved in various pending legal proceedings arising out of the ordinary course of business. These proceedings primarily involve commercial claims, product liability claims, personal injury claims, and workers’ compensation claims. None of these legal proceedings are expected to have a material adverse effect on the results of operations, cash flows, or financial condition of the Company. Wi th respect to these proceedings, management believes that the Company will prevail, has adequate insurance coverage or has established appropriate reserves to cover potential liabilities. Any costs that management estimates may be paid related to these proceedings or claims are accrued when the liability is considered probable and the amount can be reasonably estimated. There can be no assurance, however, as to the ultimate outcome of any of these matters, and if all or substantially all of these legal proceedings were to be determined adversely to the Company, there could be a material adverse effect on the results of operations, cash flows, or financial condition of the Company. We have established loss provisions for matters in which losses are probable and can be reasonably estimated. There were no material amounts accrued in the accompanying unaudited condensed consolidated balance sheet for potential litigation as of March 31, 2017 or December 31, 2016. For matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, we believe that such losses, individually and in the aggregate, will not have a material effect on our unaudited condensed consolidated financial statements. The Company also risks exposure to product liability claims in connection with products it has sold and those sold by businesses that the Company acquired. Although in some cases third parties have retained responsibility for product liability claims relating to products manufactured or sold prior to the acquisition of the relevant business and in other cases the persons from whom the Company has acquired a business may be required to indemnify the Company for certain product liability claims subject to certain caps or limitations on indemnification, the Company cannot assure that those third parties will in fact satisfy their obligations with respect to liabilities retained by them or their indemnification obligations. If those third parties become unable to or otherwise do not comply with their respective obligations including indemnity obligations, or if certain product liability claims for which the Company is obligated were not retained by third parties or are not subject to these indemnities, the Company could become subject to significant liabilities or other adverse consequences. Moreover, even in cases where third parties retain responsibility for product liability claims or are required to indemnify the Company, significant claims arising from products that have been acquired could have a material adverse effect on the Company’s ability to realize the benefits from an acquisition, could result in the reduction of the value of goodwill that the Company recorded in connection with an acquisition, or could otherwise have a material adverse effect on the Company’s business, financial condition, or operations.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events Dividend On April 26, 2017, the Company declared a dividend of $0.17 per share for the quarter ended June 30, 2017, payable on July 6, 2017 to shareholders of record as of June 16, 2017.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America. These statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary to present fairly the Company’s financial position for the interim periods presented, and cash flows for the interim periods presented. The results are not necessarily indicative of future results. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure.
Recent Accounting Standards	3. Recent Accounting Standards In October 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In August 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230): Classification of certain cash receipts and cash payments (a consensus of the emerging issues task force) In February 2015, the FASB issued ASU 2016-02, Leases (Topic 842) In May 2014, the FASB issued ASU No. 2014-09 Revenue from Contracts with Customers Recently Adopted Accounting Standards In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory Under this guidance, entities utilizing the first-in-first-out (“FIFO”) or average cost method should measure inventory at the lower of cost or net realizable value, whereas net realizable value is defined as the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The Company adopted this guidance on January 1, 2017. The adoption of this ASU did not have a material impact to our Condensed Consolidated Financial Statements.
Fair Value of Financial Instruments	Fair value is determined based upon the exit price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants, as determined by either the principal market or the most advantageous market. Inputs used in the valuation techniques to derive fair values are classified based on a three-level hierarchy, as follows: • Level 1- Quoted prices in active markets for identical assets or liabilities. • Level 2- Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived, • Level 3- Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities. The Company considers all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents. The carrying values of financial instruments, including accounts receivable, cash equivalents, accounts payable, and other accrued liabilities approximate fair value. Debt under the Company’s 2015 Credit Agreement approximates the fair value due to the variable rate nature at current market rates. The Company determines the fair value of financial instruments using quoted market prices whenever available. When quoted market prices are not available for various types of financial instruments (such as forwards, options and swaps), the Company uses standard models with market-based inputs, which take into account the present value of estimated future cash flows and the ability of the Company or the financial counterparty to perform. For interest rate and cross currency swaps, the significant inputs to these models are interest rate curves for discounting future cash flows and are adjusted for credit risk. For forward foreign currency contracts, the significant inputs are interest rate curves for discounting future cash flows, and exchange rate curves of the foreign currency for translating future cash flows. See additional discussion of the Company’s use of financial instruments including a cross-currency swap included in Note 15
Warranty Costs	Warranty Costs The contractual warranty period of the Company's products generally ranges from three months to two years with certain warranties extending for longer periods. Estimated expenses related to product warranties are accrued at the time products are sold to customers and are recorded in accruals and other current liabilities on the unaudited condensed consolidated balance sheet. Estimates are established using historical information as to the nature, frequency and average costs of warranty claims.

Changes in Accumulated Other 26

Changes in Accumulated Other Comprehensive Loss by Component (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Reconciliation of Changes in Accumulated Other Comprehensive Loss by Component	The following is a reconciliation of changes in accumulated other comprehensive loss by component for the periods presented: Gains and Losses on Cash Flow Hedges Defined Benefit Pension Plans Cumulative Foreign Currency Translation Adjustment Total Accumulated Other Comprehensive Loss by Component, January 1, 2017 $ (646 ) $ (5,668 ) $ (69,772 ) $ (76,086 ) Net current-period Other Comprehensive Income (Loss) 818 (234 ) 4,146 4,730 Accumulated Other Comprehensive Income (Loss) by Component, March 31, 2017 $ 172 $ (5,902 ) $ (65,626 ) $ (71,356 ) Gains and Losses on Cash Flow Hedges Defined Benefit Pension Plans Cumulative Foreign Currency Translation Adjustment Total Accumulated Other Comprehensive Loss by Component, January 1, 2016 $ (140 ) $ (5,807 ) $ (57,885 ) $ (63,832 ) Net current-period Other Comprehensive Income — 110 4,079 4,189 Accumulated Other Comprehensive Loss by Component, March 31, 2016 $ (140 ) $ (5,697 ) $ (53,806 ) $ (59,643 )

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Schedule of Purchase Price Allocation for Estimated Fair Values of Assets Acquired and Liabilities Assumed	As of March 31, 2017, the allocation of the purchase price for the Stromag Acquisition is preliminary. The fair value of all the acquired identifiable assets and liabilities is provisional pending finalization of the Company’s acquisition accounting. The Company believes that such preliminary allocations provide a reasonable basis for estimating the fair values of assets acquired and liabilities assumed, but the Company is waiting for additional information necessary to finalize fair value. The Company recorded certain immaterial measurement period adjustments during the quarter ended March 31, 2017. The preliminary purchase price allocations include such adjustments. Preliminary Purchase Price Allocation Total purchase price, excluding acquisition costs of approximately $2.9 million $ 194,736 Cash and cash equivalents 8,758 Trade receivables 24,014 Inventories 23,558 Property, plant and equipment 40,343 Intangible assets 74,795 Prepaid expenses and other current assets 778 Total assets acquired $ 172,246 Accounts payable (15,370 ) Accrued payroll (7,171 ) Accrued expenses and other current liabilities (4,357 ) Income tax payable (2,525 ) Deferred tax liability (26,880 ) Other long-term liabilities (1,255 ) Pension liability (15,283 ) Total liabilities assumed $ (72,841 ) Net assets acquired 99,406 Excess purchase price over fair value of net assets acquired $ 95,330
Schedule of Intangible Assets Acquired	Intangible assets acquired consist of: Customer relationships $ 56,019 Trade names and trademarks 18,776 Total intangible assets $ 74,795
Schedule of Unaudited Pro Forma Results of Operation	The following table sets forth the unaudited pro forma results of operations of the Company for the quarter to date period ended March 31, 2016, as if the Company had acquired Stromag at the beginning of the period. The pro forma information contains the actual operating results of the Company, including Stromag, adjusted to include the pro forma impact of (i) additional depreciation expense as a result of estimated depreciation based on the fair value of fixed assets and; (ii) additional expense as a result of the estimated amortization of identifiable intangible assets; (iii) additional interest expense for borrowings under the Credit Agreement associated with the Stromag Acquisition. These pro forma amounts do not purport to be indicative of the results that would have actually been obtained if the acquisition occurred at the beginning of the period or that may be obtained in the future. Proforma (unaudited) Quarter Ended March 31, 2016 Total revenues $ 216,876 Net income $ 10,887 Basic earnings per share $ 0.42 Diluted earnings per share $ 0.42

Net Income per Share (Tables)

Net Income per Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Reconciliation of Basic to Diluted Net Income per Share	The following is a reconciliation of basic to diluted net income per share: Quarter Ended March 31, 2017 March 31, 2016 Net income $ 10,326 $ 8,810 Shares used in net income per common share - basic 28,763 25,740 Incremental shares of unvested restricted common stock 134 19 Shares used in net income per common share - diluted 28,897 25,759 Earnings per share: Basic net income $ 0.36 $ 0.34 Diluted net income $ 0.36 $ 0.34

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories at March 31, 2017 and December 31, 2016 consisted of the following: March 31, 2017 December 31, 2016 Raw materials $ 44,623 $ 45,507 Work in process 21,933 20,128 Finished goods 72,888 74,205 $ 139,444 $ 139,840

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Goodwill	Changes in goodwill from January 1, 2017 through March 31, 2017 were as follows: Couplings, Clutches & Brakes Electromagnetic Clutches & Brakes Gearing Total Net goodwill balance January 1, 2017 $ 104,465 $ 37,161 $ 47,215 $ 188,841 Measurement period adjustment related to acquisition of Stromag (See Note 6) $ 1,865 $ 340 $ - 2,205 Impact of changes in foreign currency and other 1,596 114 105 1,815 Net goodwill balance March 31, 2017 $ 107,926 $ 37,615 $ 47,320 $ 192,861
Other Intangible Assets	Other intangible assets as of March 31, 2017 and December 31, 2016 consisted of the following: March 31, 2017 December 31, 2016 Cost Accumulated Amortization Net Cost Accumulated Amortization Net Other intangible assets Intangible assets not subject to amortization: Tradenames and trademarks $ 50,910 $ — $ 50,910 $ 50,416 $ — $ 50,416 Intangible assets subject to amortization: Customer relationships 165,243 63,378 $ 101,865 164,406 60,761 103,645 Product technology and patents 6,450 5,852 $ 598 6,090 5,468 622 Total intangible assets $ 222,603 $ 69,230 $ 153,373 $ 220,912 $ 66,229 $ 154,683

Warranty Costs (Tables)

Warranty Costs (Tables)	3 Months Ended
	Mar. 31, 2017
Guarantees [Abstract]
Changes in Carrying Amount of Accrued Product Warranty Costs	Changes in the carrying amount of accrued product warranty costs for each of the quarters ended March 31, 2017 and March 31, 2016 are as follows: March 31, 2017 March 31, 2016 Balance at beginning of period $ 9,158 $ 9,468 Accrued current period warranty expense 122 133 Payments and adjustments (110 ) (104 ) Balance at end of period $ 9,170 $ 9,497

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Outstanding Debt Obligations	Outstanding debt obligations at March 31, 2017 and December 31, 2016 were as follows. March 31, 2017 December 31, 2016 Debt: Revolving Credit Facility $ 305,407 $ 313,620 Convertible Notes — 45,656 Mortgages 12,269 12,755 Capital leases 313 363 Total debt 317,989 372,394 Less: debt discount, net of accretion — (2,735 ) Total debt, net of unaccreted discount $ 317,989 $ 369,659 Less current portion of long-term debt (340 ) (43,690 ) Total long-term debt, net of unaccreted discount $ 317,649 $ 325,969

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2017
Stockholders Equity Note [Abstract]
Company's Restricted Stock Grants	The following table sets forth the activity of the Company’s restricted stock and performance share grants in the quarter ended March 31, 2017: Shares Weighted-average grant date fair value Shares unvested January 1, 2017 199,712 $ 24.68 Shares granted 142,304 39.19 Shares for which restrictions lapsed (19,504 ) 38.59 Shares unvested March 31, 2017 322,512 $ 30.83

Restructuring, Asset Impairme34

Restructuring, Asset Impairment, and Transition Expenses (Tables)	3 Months Ended
	Mar. 31, 2017
Restructuring And Related Activities [Abstract]
Summary of Total Restructuring Expense	The following table details restructuring charges incurred by segment for the periods presented. Quarter Ended March 31, 2017 March 31, 2016 Couplings, Clutches & Brakes $ 1,361 $ 404 Electromagnetic Clutches & Brakes — 673 Gearing 296 16 Corporate (1) 241 460 Total $ 1,898 $ 1,553
Reconciliation of Accrued Restructuring Costs	The following is a reconciliation of the accrued restructuring costs between January 1, 2017 and March 31, 2017. All Plans Balance at January 1, 2017 $ 1,971 Restructuring expense incurred 1,898 Cash payments (2,472 ) Balance at March 31, 2017 $ 1,397

Segments, Concentrations and 35

Segments, Concentrations and Geographic Information (Tables)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	Segment financial information and a reconciliation of segment results to consolidated results follows: Quarter Ended March 31, 2017 2016 Net Sales: Couplings, Clutches & Brakes $ 106,232 $ 75,623 Electromagnetic Clutches & Brakes 63,878 57,349 Gearing 47,028 48,920 Inter-segment eliminations (1,703 ) (1,439 ) Net sales $ 215,435 $ 180,453 Income from operations: Segment earnings: Couplings, Clutches & Brakes $ 8,345 $ 6,291 Electromagnetic Clutches & Brakes 7,593 6,463 Gearing 5,525 5,762 Restructuring (1,898 ) (1,553 ) Corporate expenses (1) (1,903 ) (1,986 ) Income from operations $ 17,662 $ 14,977 Other non-operating (income) expense: Net interest expense $ 1,705 $ 2,896 Other non-operating expense (income), net (530 ) (278 ) Loss on extinguishment of convertible debt 1,797 - 2,972 2,618 Income before income taxes 14,690 12,359 Provision for income taxes 4,364 3,549 Net income $ 10,326 $ 8,810 (1) Certain expenses are maintained at the corporate level and not allocated to the segments. These include various administrative expenses related to corporate headquarters, depreciation on capitalized software costs, non-capitalizable software implementation costs and acquisition related expenses and non-cash partial pension settlements.
Reconciliation of Assets from Segment to Consolidated	Selected information by segment (continued) Quarter Ended March 31, 2017 March 31, 2016 Depreciation and amortization: Couplings, Clutches & Brakes $ 5,137 $ 3,688 Electromagnetic Clutches & Brakes 1,215 1,148 Gearing 1,651 1,671 Corporate 803 731 Total depreciation and amortization $ 8,806 $ 7,238 March 31, 2017 March 31, 2016 Total assets: Couplings, Clutches & Brakes $ 541,343 $ 333,595 Electromagnetic Clutches & Brakes 176,167 130,038 Gearing 132,971 135,231 Corporate (2) 27,047 37,066 Total assets $ 877,528 $ 635,930 (1) Corporate assets are primarily cash and cash equivalents, tax related asset accounts, certain capitalized software costs, property, plant and equipment and deferred financing costs.
Revenue from External Customers by Geographic Areas	Net sales to third parties by geographic region are as follows: Net Sales Quarter Ended March 31, 2017 March 31, 2016 North America (primarily U.S.) $ 115,140 $ 112,183 Europe 83,294 52,113 Asia and other 17,001 16,157 Total $ 215,435 $ 180,453

Derivative Financial Instrume36

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Outstanding Swaps	The following table summarizes outstanding swaps which the Company has recorded at March 31, 2017. Initial US$ Date Derivative Notional Entered Financial Amount Floating Leg Floating Leg Settlement Effective into Instrument (thousands) (swap counterparty) Fixed Rate (Company) Dates Period of swap 12/21/2016 Cross currency interest rate swap $ 100,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter 1.027% EUR N/A Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 12/31/2019 12/21/2016 Cross currency interest rate swap 40,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter N/A Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.920% Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 12/31/2018 12/21/2016 Cross currency interest rate swap 30,000 Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter N/A Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.721% Monthly on the last banking day of each month commencing December 30, 2016 12/23/2016 - 6/30/2017 1/31/2017 Interest rate swap 50,000 Variable rate 1-month USD Libor 1.625% USD N/A Monthly on the last banking day of each month commencing February 28, 2017 1/31/2017 - 1/31/2020
Summary of Fair Value Level 2 Inputs of Company's Derivatives	The following table summarizes the location and fair value, using Level 2 inputs (see Note 4 for a description of the fair value levels), of the Company's derivatives designated and not designated as hedging instruments in the Condensed Consolidated Balance Sheets (in thousands). March 31, December, Balance Sheet Location 2017 2016 Designated as hedging instruments: Cross currency swap agreements Other long-term liabilities $ 2,355 $ 1,642 Interest rate swap agreement Other long-term assets 10 - Not designated as hedging instruments: Cross currency swap agreements Other long-term liabilities 1,672 889 $ 4,017 $ 2,531
Summary of (Gain) Loss Reclassified From Accumulated Other Comprehensive Loss Earnings For Derivatives	The following table summarizes the location of (gain) loss reclassified from Accumulated other comprehensive loss into earnings for derivatives designated as hedging instruments and the location of (gain) loss for our derivatives not designated as hedging instruments in the Consolidated Statements of Income (in thousands). March, 31 Income Statement Location 2017 Designated as hedging instruments: Cross currency swap agreements Other non-operating (income) expense, net $ 1,521 Not designated as hedging instruments: Cross currency swap agreements Other non-operating (income) expense, net 783 $ 2,304

Organization and Nature of Op37

Organization and Nature of Operations - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017productcountry
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of product lines (more than) | product	42
Number of countries in which the company has production facilities | country	12

Changes in Accumulated Other 38

Changes in Accumulated Other Comprehensive Loss by Component - Reconciliation of Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) by component, beginning balance	$ (76,086)	$ (63,832)
Net current-period Other Comprehensive Income (Loss)	4,730	4,189
Accumulated other comprehensive income (loss) by component, ending balance	(71,356)	(59,643)
Gains and Losses on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) by component, beginning balance	(646)	(140)
Net current-period Other Comprehensive Income (Loss)	818	0
Accumulated other comprehensive income (loss) by component, ending balance	172	(140)
Defined Benefit Pension Plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) by component, beginning balance	(5,668)	(5,807)
Net current-period Other Comprehensive Income (Loss)	(234)	110
Accumulated other comprehensive income (loss) by component, ending balance	(5,902)	(5,697)
Cumulative Foreign Currency Translation Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) by component, beginning balance	(69,772)	(57,885)
Net current-period Other Comprehensive Income (Loss)	4,146	4,079
Accumulated other comprehensive income (loss) by component, ending balance	$ (65,626)	$ (53,806)

Acquisitions - Schedule of Purc

Acquisitions - Schedule of Purchase Price Allocation for Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Excess purchase price over fair value of net assets acquired	$ 192,861	$ 188,841
Stromag [Member]
Business Acquisition [Line Items]
Total purchase price, excluding acquisition costs of approximately $2.9 million	194,736
Cash and cash equivalents	8,758
Trade receivables	24,014
Inventories	23,558
Property, plant and equipment	40,343
Intangible assets	74,795
Prepaid expenses and other current assets	778
Total assets acquired	172,246
Accounts payable	(15,370)
Accrued payroll	(7,171)
Accrued expenses and other current liabilities	(4,357)
Income tax payable	(2,525)
Deferred tax liability	(26,880)
Other long-term liabilities	(1,255)
Pension liability	(15,283)
Total liabilities assumed	(72,841)
Net assets acquired	99,406
Excess purchase price over fair value of net assets acquired	$ 95,330

Acquisitions - Schedule of Pu40

Acquisitions - Schedule of Purchase Price Allocation for Estimated Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) $ in Millions	Dec. 30, 2016USD ($)
Stromag [Member]
Business Acquisition [Line Items]
Acquisition costs	$ 2.9

Acquisitions - Schedule of Inta

Acquisitions - Schedule of Intangible Assets Acquired (Detail) - Stromag [Member] $ in Thousands	Mar. 31, 2017USD ($)
Intangible assets acquired consist of:
Customer relationships	$ 56,019
Trade names and trademarks	18,776
Total intangible assets	$ 74,795

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017
Customer Relationships [Member] | Stromag [Member]
Business Acquisition [Line Items]
Amortization period	15 years

Acquisitions - Schedule of Prof

Acquisitions - Schedule of Proforma Amount on Acquisition Occurred (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)$ / shares
Business Combinations [Abstract]
Total revenues | $	$ 216,876
Net income | $	$ 10,887
Basic earnings per share | $ / shares	$ 0.42
Diluted earnings per share | $ / shares	$ 0.42

Net Income per Share - Reconcil

Net Income per Share - Reconciliation of Basic to Diluted Net Income per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 10,326	$ 8,810
Shares used in net income per common share - basic (in shares)	28,763	25,740
Incremental shares of unvested restricted common stock (in shares)	134	19
Shares used in net income per common share - diluted (in shares)	28,897	25,759
Earnings per share:
Basic net income	$ 0.36	$ 0.34
Diluted net income	$ 0.36	$ 0.34

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 44,623	$ 45,507
Work in process	21,933	20,128
Finished goods	72,888	74,205
Inventories, net	$ 139,444	$ 139,840

Goodwill and Intangible Asset46

Goodwill and Intangible Assets - Changes in Goodwill (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Goodwill [Roll Forward]
Net goodwill, beginning balance	$ 188,841
Measurement period adjustment related to acquisition of Stromag	2,205
Impact of changes in foreign currency and other	1,815
Net goodwill, ending balance	192,861
Couplings, Clutches and Brakes [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance	104,465
Measurement period adjustment related to acquisition of Stromag	1,865
Impact of changes in foreign currency and other	1,596
Net goodwill, ending balance	107,926
Electromagnetic Clutches and Brakes [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance	37,161
Measurement period adjustment related to acquisition of Stromag	340
Impact of changes in foreign currency and other	114
Net goodwill, ending balance	37,615
Gearing [Member]
Goodwill [Roll Forward]
Net goodwill, beginning balance	47,215
Impact of changes in foreign currency and other	105
Net goodwill, ending balance	$ 47,320

Goodwill and Intangible Asset47

Goodwill and Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Total intangible assets, accumulated amortization	$ 69,230	$ 66,229
Total intangible assets, cost	222,603	220,912
Total intangible assets, net	153,373	154,683
Customer Relationships [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	165,243	164,406
Total intangible assets, accumulated amortization	63,378	60,761
Intangible assets subject to amortization, net	101,865	103,645
Product Technology and Patents [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, cost	6,450	6,090
Total intangible assets, accumulated amortization	5,852	5,468
Intangible assets subject to amortization, net	598	622
Tradenames and Trademarks [Member]
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, cost	$ 50,910	$ 50,416

Goodwill and Intangible Asset48

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 2,345	$ 2,119
Estimated Amortization Expense for Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Remainder 2,017	6,700
Year 2,018	9,600
Year 2,019	9,600
Year 2,020	9,600
Year 2,021	9,600
Thereafter	$ 57,600

Warranty Costs - Additional Inf

Warranty Costs - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017
Minimum [Member]
Guarantor Obligations [Line Items]
Product warranty period	3 months
Maximum [Member]
Guarantor Obligations [Line Items]
Product warranty period	2 years

Warranty Costs - Changes in Car

Warranty Costs - Changes in Carrying Amount of Accrued Product Warranty Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Balance at beginning of period	$ 9,158	$ 9,468
Accrued current period warranty expense	122	133
Payments and adjustments	(110)	(104)
Balance at end of period	$ 9,170	$ 9,497

Debt - Outstanding Debt Obligat

Debt - Outstanding Debt Obligations (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 317,989	$ 372,394
Less: debt discount, net of accretion		(2,735)
Total debt, net of unaccreted discount	317,989	369,659
Less current portion of long-term debt	(340)	(43,690)
Total long-term debt, net of unaccreted discount	317,649	325,969
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	305,407	313,620
Convertible Notes [Member]
Debt Instrument [Line Items]
Total debt		45,656
Mortgages [Member]
Debt Instrument [Line Items]
Total debt	12,269	12,755
Capital Leases [Member]
Debt Instrument [Line Items]
Total debt	$ 313	$ 363

Debt - Additional Information (

Debt - Additional Information (Detail)

Dec. 31, 2016USD ($)shares

Dec. 12, 2016USD ($)

Oct. 21, 2016USD ($)

Dec. 31, 2015USD ($)

Oct. 22, 2015USD ($)

Sep. 01, 2011USD ($)

Jan. 31, 2017USD ($)shares

Mar. 31, 2011

Mar. 31, 2017USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2015EUR (€)

Mar. 31, 2017EUR (€)

Dec. 30, 2016USD ($)

Dec. 31, 2015EUR (€)

Debt Instrument [Line Items]

Loss on extinguishment of convertible debt

$ 1,797,000

Carrying amount of financial instruments

$ 325,969,000

317,649,000

Borrowings under overdraft agreements

0

$ 0

Zlate Moravce, Slovakia [Member]

Debt Instrument [Line Items]

Interest rate

1.95%

Loan amount principal outstanding

$ 2,500,000

€ 2,700,000

Description about maturity date of debt instrument

loan is due in installments from 2016 through 2020

Line of Credit [Member] | Multicurrency [Member]

Debt Instrument [Line Items]

Availability under credit facility agreement

$ 250,000,000

Convertible Notes [Member]

Debt Instrument [Line Items]

Debt instrument, maturity date

Mar. 1, 2031

Coupon interest rate

2.75%

Proceeds from the offering

$ 81,300,000

Notes redemption date

Jan. 12, 2017

Percentage of convertible notes redeemable

100.00%

Surrender of notes for conversion end date

Jan. 9, 2017

Conversion of notes into shares (in shares)

0.390809

Principal amount of notes

$ 1,000

Conversion of notes into shares, amount

$ 39,300,000

$ 44,700,000

Conversion of notes into shares (in shares) | shares

1,500,000

1,700,000

Loss on extinguishment of convertible debt

$ 1,900,000

$ 1,800,000

Carrying amount of financial instruments

42,900,000

Redemption of debt

$ 900,000

Mortgages [Member] | Heidelberg Germany [Member]

Debt Instrument [Line Items]

Interest rate

1.79%

New mortgage amount

$ 1,700,000

$ 1,400,000

$ 1,700,000

1,300,000

€ 1,500,000

Mortgages [Member] | Esslingen Germany [Member]

Debt Instrument [Line Items]

Construction loan

6,700,000

$ 6,300,000

$ 6,700,000

6,000,000

6,000,000

Mortgage interest rate

2.50%

2.50%

Monthly installments

$ 100,000

€ 100,000

Mortgages [Member] | Angers France [Member]

Debt Instrument [Line Items]

Interest rate

1.85%

Construction loan

$ 2,300,000

$ 2,000,000

$ 2,300,000

€ 1,900,000

€ 2,100,000

Capital Leases [Member]

Debt Instrument [Line Items]

Principal amount of debt

400,000

300,000

2015 Credit Agreement [Member]

Debt Instrument [Line Items]

Amendment fee included in other non-current assets

600,000

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Availability under credit facility agreement

$ 350,000,000

$ 425,000,000

Debt instrument, maturity date

Oct. 22, 2020

Outstanding on revolving credit facility

305,400,000

Amount available under credit facility

115,100,000

Credit facility additional borrowing capacity

$ 75,000,000

150,000,000

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member] | Eurodollar Loan [Member]

Debt Instrument [Line Items]

Applicable margins for loans

1.50%

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member] | Minimum [Member] | Eurodollar Loan [Member]

Debt Instrument [Line Items]

Applicable margins for loans

1.25%

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member] | Minimum [Member] | ABR Based Loans [Member]

Debt Instrument [Line Items]

Applicable margins for loans

0.25%

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member] | Maximum [Member] | Eurodollar Loan [Member]

Debt Instrument [Line Items]

Applicable margins for loans

2.00%

2015 Credit Agreement [Member] | Line of Credit [Member] | 2015 Revolving Credit Facility [Member] | Maximum [Member] | ABR Based Loans [Member]

Debt Instrument [Line Items]

Applicable margins for loans

1.00%

2015 Credit Agreement [Member] | Line of Credit [Member] | Letter of Credit [Member]

Debt Instrument [Line Items]

Letters of credit outstanding

$ 4,100,000

4,500,000

2015 Credit Agreement [Member] | Domestic Line of Credit [Member] | 2015 Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Outstanding on revolving credit facility

$ 297,900,000

Interest rate

2.54%

2015 Credit Agreement [Member] | Foreign Line of Credit [Member] | 2015 Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Outstanding on revolving credit facility

$ 7,500,000

Interest rate

1.75%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Oct. 19, 2016	Mar. 31, 2017	Mar. 31, 2016	May 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1,800,000	$ 1,200,000
Unrecognized compensation cost		$ 6,300,000
Weighted average remaining period		3 years
Fair market value of the shares		$ 800,000
Stock repurchase program, authorized amount				$ 50,000,000
Stock repurchase program, expiration period	Dec. 31, 2019
Repurchased shares of common stock		0
Cash dividends declared (in USD per share)		$ 0.15	$ 0.15
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount	$ 30,000,000
2004 Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares subject to outstanding awards (in shares)		750,576
2014 Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for delivery pursuant to the grant of awards (in shares)		750,000
Restricted shares for vesting period		5 years

Stockholders' Equity - Company'

Stockholders' Equity - Company's Unvested Restricted Stock Grants (Detail) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares unvested, beginning balance | shares	199,712
Shares granted | shares	142,304
Shares for which restrictions lapsed | shares	(19,504)
Shares unvested, ending balance | shares	322,512
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-average grant date fair value, beginning balance | $ / shares	$ 24.68
Weighted-average grant date fair value, shares granted | $ / shares	39.19
Weighted-average grant date fair value, shares for which restrictions lapsed | $ / shares	38.59
Weighted-average grant date fair value, ending balance | $ / shares	$ 30.83

Restructuring, Asset Impairme55

Restructuring, Asset Impairment, and Transition Expenses - Summary of Total Restructuring Expense (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 1,898	$ 1,553
Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,898	1,553
Operating Segments [Member] | Couplings, Clutches and Brakes [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,361	404
Operating Segments [Member] | Electromagnetic Clutches and Brakes [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			673
Operating Segments [Member] | Gearing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs		296	16
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	$ 241	$ 460
[1]	Certain expenses are maintained at the corporate level and not allocated to the segments. These include various administrative expenses related to corporate headquarters, depreciation on capitalized software costs, non-capitalizable software implementation costs and acquisition related expenses and non-cash partial pension settlements.

Restructuring, Asset Impairme56

Restructuring, Asset Impairment, and Transition Expenses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,898,000	$ 1,553,000
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost remaining	1,000,000
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost remaining	3,500,000
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	100,000	1,000,000
Consolidation costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	700,000
Moving and relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	700,000
Building impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs		200,000
Travel-related and other restructuring costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 400,000	$ 300,000

Restructuring, Asset Impairme57

Restructuring, Asset Impairment, and Transition Expenses - Reconciliation of Accrued Restructuring Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 1,971
Restructuring expense incurred	1,898	$ 1,553
Cash payments	(2,472)
Ending Balance	$ 1,397

Segments, Concentrations and 58

Segments, Concentrations and Geographic Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017segmentcustomer	Mar. 31, 2016customer
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of business segments | segment	3
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of major customers	0	0
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (as percent)	10.00%	10.00%
Gearing [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of major customers	1
Concentration risk (as percent)	10.00%

Segments, Concentrations and 59

Segments, Concentrations and Geographic Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		$ 215,435	$ 180,453
Income from operations		17,662	14,977
Restructuring		(1,898)	(1,553)
Net interest expense		1,705	2,896
Other non-operating income, net		(530)	(278)
Loss on extinguishment of convertible debt		1,797
Total other non-operating (income) expense, net		2,972	2,618
Income before income taxes		14,690	12,359
Provision for income taxes		4,364	3,549
Net income		10,326	8,810
Total depreciation and amortization		8,806	7,238
Total assets		877,528	635,930	$ 869,824
North America (primarily U.S.) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		115,140	112,183
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		83,294	52,113
Asia And Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		17,001	16,157
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Restructuring		(1,898)	(1,553)
Operating Segments [Member] | Couplings, Clutches and Brakes [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		106,232	75,623
Income from operations		8,345	6,291
Restructuring		(1,361)	(404)
Total depreciation and amortization		5,137	3,688
Total assets		541,343	333,595
Operating Segments [Member] | Electromagnetic Clutches and Brakes [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		63,878	57,349
Income from operations		7,593	6,463
Restructuring			(673)
Total depreciation and amortization		1,215	1,148
Total assets		176,167	130,038
Operating Segments [Member] | Gearing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		47,028	48,920
Income from operations		5,525	5,762
Restructuring		(296)	(16)
Total depreciation and amortization		1,651	1,671
Total assets		132,971	135,231
Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales		(1,703)	(1,439)
Corporate [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Income from operations	[1]	(1,903)	(1,986)
Restructuring	[1]	(241)	(460)
Total depreciation and amortization		803	731
Total assets	[2]	$ 27,047	$ 37,066
[1]	Certain expenses are maintained at the corporate level and not allocated to the segments. These include various administrative expenses related to corporate headquarters, depreciation on capitalized software costs, non-capitalizable software implementation costs and acquisition related expenses and non-cash partial pension settlements.
[2]	Corporate assets are primarily cash and cash equivalents, tax related asset accounts, certain capitalized software costs, property, plant and equipment and deferred financing costs.

Derivative Financial Instrume60

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Jan. 31, 2017
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Effective portion of gain (loss) on derivative	$ 100,000,000
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Nineteen [Member]
Derivative [Line Items]
Notional Amount	$ 100,000,000
Effective date of interest rate swap	Dec. 21, 2016
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen and December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member]
Derivative [Line Items]
Notional Amount	$ 70,000,000
Cross Currency Interest Rate Swap [Member]
Derivative [Line Items]
Unrealized gain related to interest rate swaps in accumulated other comprehensive income (loss)	100,000
Interest Rate Swap Effective Period Of Swap January Thirty One Two Thousand Seventeen To January Thirty One Two Thousand Twenty [Member]
Derivative [Line Items]
Notional Amount	$ 50,000,000
Effective date of interest rate swap	Jan. 31, 2017
Interest Rate Swap Effective Period Of Swap January Thirty One Two Thousand Seventeen To January Thirty One Two Thousand Twenty [Member] | Two Thousand Fifteen Credit Agreement [Member]
Derivative [Line Items]
Notional Amount		$ 50,000,000
Fixed Rate		1.625%
Effective date of interest rate swap	Jan. 31, 2017
Maturity date of interest rate swap	Jan. 31, 2020
Interest Rate Swap [Member]
Derivative [Line Items]
Unrealized gain related to interest rate swaps in accumulated other comprehensive income (loss)	$ 10,000

Derivative Financial Instrume61

Derivative Financial Instruments - Summary of Outstanding Swaps (Detail)	3 Months Ended
	Mar. 31, 2017USD ($)
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Nineteen [Member]
Derivative [Line Items]
Derivative Entered into	Dec. 21, 2016
Notional Amount	$ 100,000,000
Settlement Dates	Monthly on the last banking day of each month commencing December 30, 2016
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Nineteen [Member] | USD [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Nineteen [Member] | Euro [Member]
Derivative [Line Items]
Floating Leg	N/A
Fixed Rate	1.027%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Nineteen [Member] | 1-Month Libor [Member]
Derivative [Line Items]
Derivative basis spread on variable rate	1.50%
Derivative basis spread on variable rate, thereafter	1.75%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen [Member]
Derivative [Line Items]
Derivative Entered into	Dec. 21, 2016
Notional Amount	$ 40,000,000
Settlement Dates	Monthly on the last banking day of each month commencing December 30, 2016
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen [Member] | USD [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen [Member] | Euro [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.920%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen [Member] | 1-Month Libor [Member]
Derivative [Line Items]
Derivative basis spread on variable rate	1.50%
Derivative basis spread on variable rate, thereafter	1.75%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To December Thirty One Two Thousand Eighteen [Member] | 1-month EURIBOR [Member]
Derivative [Line Items]
Derivative floor interest rate	0.00%
Derivative variable interest rate	0.92%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member]
Derivative [Line Items]
Derivative Entered into	Dec. 21, 2016
Notional Amount	$ 30,000,000
Settlement Dates	Monthly on the last banking day of each month commencing December 30, 2016
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member] | USD [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month USD Libor plus 1.50% to 3/31/17 and 1.75% thereafter
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member] | Euro [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month EURIBOR, floored at 0.00%, plus 0.721%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member] | 1-Month Libor [Member]
Derivative [Line Items]
Derivative basis spread on variable rate	1.50%
Derivative basis spread on variable rate, thereafter	1.75%
Cross Currency Interest Rate Swap Effective Period of Swap December Twenty Three Two Thousand Sixteen To June Thirty Two Thousand Seventeen [Member] | 1-month EURIBOR [Member]
Derivative [Line Items]
Derivative floor interest rate	0.00%
Derivative variable interest rate	0.721%
Interest Rate Swap Effective Period Of Swap January Thirty One Two Thousand Seventeen To January Thirty One Two Thousand Twenty [Member]
Derivative [Line Items]
Derivative Entered into	Jan. 31, 2017
Notional Amount	$ 50,000,000
Settlement Dates	Monthly on the last banking day of each month commencing February 28, 2017
Interest Rate Swap Effective Period Of Swap January Thirty One Two Thousand Seventeen To January Thirty One Two Thousand Twenty [Member] | USD [Member]
Derivative [Line Items]
Floating Leg	Variable rate 1-month USD Libor
Fixed Rate	1.625%
Interest Rate Swap Effective Period Of Swap January Thirty One Two Thousand Seventeen To January Thirty One Two Thousand Twenty [Member] | Euro [Member]
Derivative [Line Items]
Floating Leg	N/A

Derivative Financial Instrume62

Derivative Financial Instruments - Summary of Fair Value Level 2 Inputs of Company's Derivatives (Detail) - Level 2 [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative liability	$ 4,017	$ 2,531
Designated as Hedging Instrument [Member] | Other Long-Term Liabilities | Cross Currency Swap Agreements [Member]
Derivative [Line Items]
Derivative liability	2,355	1,642
Designated as Hedging Instrument [Member] | Other Long-Term Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative assets	10
Not Designated as Hedging Instrument [Member] | Other Long-Term Liabilities | Cross Currency Swap Agreements [Member]
Derivative [Line Items]
Derivative liability	$ 1,672	$ 889

Derivative Financial Instrume63

Derivative Financial Instruments - Summary of (Gain) Loss Reclassified From Accumulated Other Comprehensive Loss Earnings For Derivatives (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on derivative hedging instruments	$ 2,304
Cross Currency Swap Agreements [Member] | Designated as Hedging Instrument [Member] | Other Non-operating (Income) Expense, Net [Member]
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on derivative hedging instruments	1,521
Cross Currency Swap Agreements [Member] | Not Designated as Hedging Instrument [Member] | Other Non-operating (Income) Expense, Net [Member]
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on derivative hedging instruments	$ 783

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Loss Contingency Accrual	$ 0	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	Apr. 26, 2017	Mar. 31, 2017	Mar. 31, 2016
Subsequent Event [Line Items]
Cash dividends declared (in USD per share)		$ 0.15	$ 0.15
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividends declared (in USD per share)	$ 0.17
Dividend declaration date	Apr. 26, 2017
Dividend payable date	Jul. 6, 2017
Dividend record date	Jun. 16, 2017