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Total other intangible assets Net

160,908

111,522

Accumulated amortization

(77,622)

(53,965)

83,286

57,557

Accrued liabilities:

Tax accruals

16,169

51,197

Accrued warranty

5,382

5,443

$ 4,558

Accrued employee liabilities

25,503

21,323

Liabilities from discounts and rebates

16,057

13,413

Other accrued liabilities

14,098

14,249

Total accrued liabilities

77,209

105,625

Customer relationships

101,213

66,542

Technology

Product development costs

47,641

35,378

Accumulated Other Comprehensive Income Loss [Line Items]

$ 12,054

$ 9,602

[1]	Includes accumulated amortization of capital lease obligations.

Etratech Acquisition - Additional Information (Detail) - USD ($) $ in Thousands			2 Months Ended
	Nov. 01, 2017	Nov. 01, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 69,685	$ 51,735	$ 27,765
Etratech Inc.
Business Acquisition [Line Items]
Product revenues			8,398
Net loss			510
Net assets acquired	$ 64,994	$ 64,994
Cash acquired on acquisition	670	$ 670
Gross contractual amount due of accounts receivable	12,654
Goodwill	14,866
Goodwill not deductible for income taxes	8,651
Intangible assets before foreign currency adjustment	$ 33,362
Amortization of intangibles			$ 635

Etratech Acquisition - Summary of Preliminary Allocation (Detail) - USD ($) $ in Thousands			12 Months Ended
	Nov. 01, 2017	Nov. 01, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 69,685	$ 51,735	$ 27,765
Purchase price			66,994	$ 73,593	$ (107)
Etratech Inc.
Business Acquisition [Line Items]
Accounts receivable	$ 12,654
Inventory	7,014
Prepaid expenses and other assets	535
Property and equipment	6,205		$ 6,205
Goodwill	14,866
Assumed liabilities	(9,642)
Net assets acquired	64,994	$ 64,994
Cash acquired on acquisition	670	$ 670
Purchase price	65,664
Etratech Inc. \| Customer relationships
Business Acquisition [Line Items]
Intangible assets	24,774
Etratech Inc. \| Technology
Business Acquisition [Line Items]
Intangible assets	$ 8,588

Etratech Acquisition - Supplemental Pro Forma Information (Detail) - Etratech Inc. - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Product revenues	$ 1,032,273	$ 966,355
Net income	$ 35,911	$ 77,577
Basic earnings per share	$ 0.98	$ 2.13
Diluted earnings per share	$ 0.98	$ 2.12

Etratech Acquisition - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	$ 160,908	$ 111,522
Accumulated Amortization	77,622	53,965
Total other intangible assets Net	83,286	57,557
Customer relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	101,213	66,542
Technology
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	47,641	$ 35,378
Etratech Inc.
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	33,362
Accumulated Amortization	635
Total other intangible assets Net	32,727
Etratech Inc. \| Customer relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	24,774
Accumulated Amortization	358
Total other intangible assets Net	$ 24,416
Etratech Inc. \| Customer relationships \| Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	8 years
Etratech Inc. \| Customer relationships \| Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	12 years
Etratech Inc. \| Technology
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Value	$ 8,588
Accumulated Amortization	277
Total other intangible assets Net	$ 8,311
Etratech Inc. \| Technology \| Minimum
Finite And Indefinite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	5 years
Etratech Inc. \| Technology \| Maximum
Finite And Indefinite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	6 years

Etratech Acquisition - Summary of Amortization Expense (Detail) - Etratech Inc. - USD ($) $ in Thousands	2 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Amortization of intangibles	$ 635
Product revenues
Business Acquisition [Line Items]
Amortization of intangibles		$ 358	$ 358
Research and development expenses
Business Acquisition [Line Items]
Amortization of intangibles		$ 277	$ 277

Etratech Acquisition - Summary of Amortization Expense for Prospective Years (Detail) - Etratech Inc. $ in Thousands	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
2018	$ 3,769
2019	3,769
2020	3,769
2021	3,706
2022	$ 3,278

Etratech Acquisition - Summary of Property and Equipment (Detail) - Etratech Inc. - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Nov. 01, 2017
Property Plant And Equipment [Line Items]
Property and equipment	$ 6,205	$ 6,205
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	10 years
Property and equipment	$ 342
Machinery and equipment
Property Plant And Equipment [Line Items]
Property and equipment	$ 5,248
Machinery and equipment \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	4 years
Machinery and equipment \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	11 years
Furniture and fittings
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	4 years
Property and equipment	$ 230
Motor vehicles
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	3 years
Property and equipment	$ 25
Computer hardware and software
Property Plant And Equipment [Line Items]
Property and equipment, Useful life	1 year
Property and equipment	$ 360

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Jan. 01, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Statutory Federal income tax rate				34.00%	34.00%	34.00%
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense				$ 20,153
Tax cuts and jobs act of 2017, incomplete accounting, change in tax rate, deferred tax balances, provisional income tax expense				5,808
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense related to onetime transition tax liability of foreign subsidiaries				23,923
Tax cuts and jobs act of 2017, incomplete accounting, benefit included in provision for income taxes to offset one-time transition tax related to previous deferred tax liability that existed for undistributed foreign earnings that were not permanently reinvested				$ 9,578
Statutory Federal income tax rate				34.00%	34.00%	34.00%
Adjustment to retained earnings due to adoption				$ 1,496
Income tax holiday, amount of corporate income tax savings realized				34,028	$ 33,965	$ 33,545
Total unrecognized tax benefits				$ 4,522	4,486	$ 4,443	$ 4,651
Macedonia
Income Taxes [Line Items]
Income tax holiday, description				The government of Macedonia granted the Company a tax holiday that released the Company from the obligation to pay corporate income taxes for a ten year period, subject to certain limitations.
Income tax holiday, period				10 years
Income tax holiday, amount of corporate income tax savings realized				$ 0	$ 0
ASU 2016-09
Income Taxes [Line Items]
Adjustment to retained earnings due to adoption	$ 1,496	$ 1,496
Reduction of effective tax rate				2.00%
Preferred Financing
Income Taxes [Line Items]
Net operating loss carryforward annual limitation				$ 591
Net operating loss carryforward expected to expire				6,025
Net operating loss expired				$ 13,324
U.S. State \| Earliest Tax Year
Income Taxes [Line Items]
Operating loss carryforward, year of expiration				2018
U.S. State \| Latest Tax Year
Income Taxes [Line Items]
Operating loss carryforward, year of expiration				2036
Non-U.S. Subsidiaries
Income Taxes [Line Items]
Operating loss carryforward, amount				$ 37,410
Operating loss valuation allowance				22,294
Foreign Jurisdictions
Income Taxes [Line Items]
Operating loss carryforward, amount				$ 12,499
Foreign Jurisdictions \| Earliest Tax Year
Income Taxes [Line Items]
Operating loss carryforward, year of expiration				2018
Foreign Jurisdictions \| Latest Tax Year
Income Taxes [Line Items]
Operating loss carryforward, year of expiration				2037
Indefinite
Income Taxes [Line Items]
Operating loss carryforward, amount				$ 24,911
Net operating loss carryforward, year of expiration				no expiration date
Scenario, Forecast
Income Taxes [Line Items]
Statutory Federal income tax rate			21.00%
Statutory Federal income tax rate			21.00%

Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating losses	$ 12,731	$ 13,643
Research and development credits	27,257	23,012
Depreciation	5,571	5,457
Valuation reserves and accrued liabilities	6,020	9,667
Foreign tax credit		6,926
Stock compensation	3,955	4,508
Inventory	2,062	1,571
Patents	163	218
Defined benefit obligation	1,977	2,306
Other credits	589	639
Unrealized foreign currency exchange loss	2,556
Other	36	116
Deferred tax assets, gross	62,917	68,063
Valuation allowance	(27,578)	(19,304)
Deferred tax liabilities:
Intangible assets	(2,925)	(8,442)
Unrealized foreign currency exchange gains		(285)
Undistributed profits of subsidiary	(6,450)	(12,002)
Property and equipment	(1,611)	(470)
Other	(548)	(319)
Deferred tax liabilities, gross	(11,534)	(21,518)
Net deferred tax asset	$ 23,805	$ 27,241

Reconciliations Between Statutory Federal Income Tax Rate and Effective Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Statutory Federal income tax rate	34.00%	34.00%	34.00%
Increase (Decrease) resulting from:
U.S. Taxes on foreign income, net of taxes paid credit		1.30%	1.00%
Change in valuation allowance	10.60%	5.30%	(1.90%)
Foreign, state and local tax, net of Federal benefit	0.80%	1.10%	1.60%
Nondeductible expenses	2.40%	2.40%	1.80%
Stock option compensation	(2.20%)		(0.10%)
Research and development credits	(4.60%)	(0.70%)	(0.90%)
Effect of different tax rates of foreign jurisdictions	(20.80%)	(15.00%)	(12.10%)
Undistributed profits of subsidiaries	5.80%	7.90%	2.40%
Tax reform items	29.10%
Other tax exempt income			(0.10%)
Tax effects of intercompany transfers	(5.00%)	(5.30%)
Other	(1.00%)	(0.30%)	0.30%
Effective rate	49.10%	30.70%	26.00%

Net Operating Loss Carryforwards (Detail) $ in Thousands	12 Months Ended
Net Operating Loss Carryforwards (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
U.S. Federal and state income tax
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 61,302
U.S. Federal and state income tax \| Minimum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2018
U.S. Federal and state income tax \| Maximum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2036
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 12,499
Foreign \| Minimum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2018
Foreign \| Maximum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2037
Indefinite
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 24,911
Operating loss carryforward, year of expiration	Indefinite

Earnings Before Income Taxes and Tax Provisions - (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income before income taxes:
Domestic	$ 1,258	$ 12,981	$ 25,508
Foreign	67,997	97,582	103,430
Earnings before income tax	$ 69,255	$ 110,563	$ 128,938

Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current income tax expense:
Federal	$ 4,140	$ 9,215	$ 8,428
State and local	150	749	606
Foreign	24,672	32,844	24,622
Total current income tax expense	28,962	42,808	33,656
Deferred income tax expense (benefit):
Federal	15,207	(10,597)	(3,051)
State and local	2,308	(742)	(183)
Foreign	(12,449)	2,496	3,123
Total deferred income tax expense	5,066	(8,843)	(111)
Total tax expense	$ 34,028	$ 33,965	$ 33,545

Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 4,486	$ 4,443	$ 4,651
Additions based on tax position related to current year	1,758	80
Additions based on tax positions related to prior year	(4)	366	262
Reductions from settlements and statute of limitation expiration	(2,247)	(299)	(19)
Effect of foreign currency translation	529	(104)	(451)
Balance at end of year	$ 4,522	$ 4,486	$ 4,443

Debt - Additional Information (Detail)	12 Months Ended
Debt - Additional Information (Detail)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Maximum percentage of stock of non US subsidiaries pledge to secure obligation	66.00%
Federal Funds Rate \| Minimum
Debt Instrument [Line Items]
Interest rate	0.50%
Federal Funds Rate \| Maximum
Debt Instrument [Line Items]
Interest rate	1.33%
London Interbank Offered Rate
Debt Instrument [Line Items]
Interest rate	1.56%
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Undrawn borrowing capacity	$ 220,859,000
United State Bank Of America Credit Facility
Debt Instrument [Line Items]
Interest rate	4.50%
Euro Currency Rate Loans \| Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
Euro Currency Rate Loans \| Minimum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	1.25%
Euro Currency Rate Loans \| Maximum
Debt Instrument [Line Items]
Interest rate	1.00%
Euro Currency Rate Loans \| Maximum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	2.00%
Base Rate Loans \| Minimum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	0.25%
Base Rate Loans \| Maximum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	1.00%
DEG Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date	2015-03
Semi-annual principal payments latest date	2019-09
DEG Vietnam Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date	2017-11
Semi-annual principal payments latest date	2023-05
Revolving Credit Facility \| Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 350,000,000

Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 144,669	$ 171,525
Current portion	(3,460)	(2,092)
Long-term debt, less current maturities	$ 141,209	$ 169,433
U.S. Revolving Note (U.S. Dollar Denominations)
Debt Instrument [Line Items]
Interest Rate	3.07%	2.27%
Total debt	$ 129,000	$ 154,000
DEG China Loan
Debt Instrument [Line Items]
Interest Rate	4.25%	4.25%
Total debt	$ 1,919	$ 2,525
DEG Vietnam Loan
Debt Instrument [Line Items]
Interest Rate	5.21%	5.21%
Total debt	$ 13,750	$ 15,000

Principal Maturities of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt maturing in 2018	$ 3,460
Debt maturing in 2019	3,459
Debt maturing in 2020	2,500
Debt maturing in 2021	131,500
Debt maturing in 2022	2,500
Thereafter	1,250
Total debt	144,669	$ 171,525
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Debt maturing in 2021	129,000
Total debt	129,000	154,000
DEG China Loan
Debt Instrument [Line Items]
Debt maturing in 2018	960
Debt maturing in 2019	959
Total debt	1,919	2,525
DEG Vietnam Loan
Debt Instrument [Line Items]
Debt maturing in 2018	2,500
Debt maturing in 2019	2,500
Debt maturing in 2020	2,500
Debt maturing in 2021	2,500
Debt maturing in 2022	2,500
Thereafter	1,250
Total debt	$ 13,750	$ 15,000

Accounting for Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	May 19, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014	May 16, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option grant expiration period					10 years
Number of performance based unvested stock options, restricted stock outstanding		282,100	210,481	179,026		177,084
Unrecognized compensation cost related to nonvested options and restricted options		$ 18,593	$ 17,258
Unrecognized share-based compensation cost recognition period		3 years
Share based compensation expense		$ 12,727	$ 8,147	$ 12,316
Weighted average grant date fair value of options granted		$ 9.11	$ 10.74	$ 10.60
Total intrinsic value of options exercised		$ 4,715	$ 2,456	$ 18,745
Total fair value of restricted shares vested		$ 6,006	3,865	4,088
Stock Appreciation Rights (SARs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of performance based unvested stock options, SARs outstanding		0
Total intrinsic value of options exercised		$ 1,495	$ 261	$ 4,185
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of performance based unvested stock options, restricted stock outstanding		0
Employee and Consultants \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, requisite service period		3 years
Employee and Consultants \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, requisite service period		5 years
Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, requisite service period		1 year
2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for grant		1,751,554
Number of shares authorized for grant							3,500,000
Number of increased shares available for grant	2,000,000
Equity Incentive Plan Twenty Eleven and Two Thousand and Six
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for grant							0

Summarizes Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Options Outstanding, beginning balance, Shares	2,103,470	1,530,845	1,674,534
Granted, Shares	808,500	862,000	524,534
Exercised, Shares	(202,328)	(112,875)	(571,723)
Forfeited, Shares	(57,500)	(176,500)	(96,500)
Stock Options Outstanding, ending balance, Shares	2,652,142	2,103,470	1,530,845
Stock Options Exercisable, Shares	984,374	675,152	439,561
Stock Options Outstanding, beginning balance, Weighted-Average Exercise Price	$ 32.72	$ 27.46	$ 19.14
Granted, Weighted-Average Exercise Price	37.23	40.87	41.97
Exercised, Weighted-Average Exercise Price	13.62	13.24	16.21
Forfeited, Weighted-Average Exercise Price	42.54	39.32	28.47
Stock Options Outstanding, ending balance, Weighted-Average Exercise Price	35.34	32.72	27.46
Exercisable, Weighted-Average Exercise Price	$ 29.84	$ 21.40	$ 12.18
Stock Options Outstanding, Weighted-Average Remaining Contractual Term	4 years 9 months 3 days	4 years 10 months 9 days	4 years 11 months 19 days
Exercisable, Weighted-Average Remaining Contractual Term	3 years 5 months 8 days	3 years 5 months 12 days	3 years 6 months 3 days
Stock Options Outstanding, Aggregate Intrinsic Value	$ 6,964	$ 12,265	$ 30,573
Exercisable, Aggregate Intrinsic Value	$ 6,534	$ 9,646	$ 15,480

Fair Value of Option on date of grant (Detail)	12 Months Ended
Fair Value of Option on date of grant (Detail)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Of Stockholders Equity [Abstract]
Expected volatility	33.00%	37.00%	35.00%
Weighted average expected volatility	33.00%	37.00%	35.00%
Expected lives	3 years	3 years	3 years
Risk-free interest rate	1.49%	0.90%
Risk-free interest rate	1.93%	1.07%
Risk-free interest rate			1.00%
Expected dividend yield	0.00%	0.00%	0.00%

Summarizes Restricted Stock Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Nonvested at beginning of period, Shares	210,481	179,026	177,084
Granted, Shares	237,542	141,784	108,026
Vested, Shares	(165,923)	(100,330)	(82,084)
Forfeited, Shares		(9,999)	(24,000)
Nonvested at end of period, Shares	282,100	210,481	179,026
Nonvested at beginning of period, Weighted-Average Grant Date Fair Value	$ 39.02	$ 34.92	$ 23.70
Granted, Weighted-Average Grant Date Fair Value	37.30	39.73	44.01
Vested, Weighted-Average Grant Date Fair Value	37.99	32.47	23.86
Forfeited, Weighted-Average Grant Date Fair Value		40.99	30.87
Nonvested at end of period, Weighted-Average Grant Date Fair Value	$ 38.06	$ 39.02	$ 34.92

Summarizes Stock Appreciation Rights (SARs) Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options Outstanding, beginning balance, Shares	2,103,470	1,530,845	1,674,534
Granted, Shares	808,500	862,000	524,534
Exercised, Shares	(202,328)	(112,875)	(571,723)
Forfeited, Shares	(57,500)	(176,500)	(96,500)
Stock Options Outstanding, ending balance, Shares	2,652,142	2,103,470	1,530,845
Exercisable, Ending Balance	984,374	675,152	439,561
Stock Options Outstanding, beginning balance, Weighted-Average Exercise Price	$ 32.72	$ 27.46	$ 19.14
Granted, Weighted-Average Exercise Price	37.23	40.87	41.97
Exercised, Weighted-Average Exercise Price	13.62	13.24	16.21
Forfeited, Weighted-Average Exercise Price	42.54	39.32	28.47
Stock Options Outstanding, ending balance, Weighted-Average Exercise Price	35.34	32.72	27.46
Exercisable, Weighted Average Exercise Price	$ 29.84	$ 21.40	$ 12.18
Stock Options Outstanding, Weighted-Average Remaining Contractual Term	4 years 9 months 3 days	4 years 10 months 9 days	4 years 11 months 19 days
Exercisable, Weighted-Average Remaining Contractual Term	3 years 5 months 8 days	3 years 5 months 12 days	3 years 6 months 3 days
Outstanding, Aggregate Intrinsic Value	$ 6,964	$ 12,265	$ 30,573
Exercisable, Aggregate Intrinsic Value	$ 6,534	$ 9,646	$ 15,480
Stock Appreciation Rights (SARs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options Outstanding, beginning balance, Shares	1,244,600	1,049,850	1,060,250
Granted, Shares	235,000	244,000	259,600
Exercised, Shares	(94,250)	(18,750)	(167,500)
Forfeited, Shares	(193,000)	(30,500)	(102,500)
Stock Options Outstanding, ending balance, Shares	1,192,350	1,244,600	1,049,850
Exercisable, Ending Balance	613,808	424,992	153,575
Stock Options Outstanding, beginning balance, Weighted-Average Exercise Price	$ 36.11	$ 34.61	$ 29.97
Granted, Weighted-Average Exercise Price	38.05	40.64	43.97
Exercised, Weighted-Average Exercise Price	22.21	24.28	23.90
Forfeited, Weighted-Average Exercise Price	32.53	28.23	27.82
Stock Options Outstanding, ending balance, Weighted-Average Exercise Price	38.17	36.11	34.61
Exercisable, Weighted Average Exercise Price	$ 37.68	$ 34.49	$ 38.12
Stock Options Outstanding, Weighted-Average Remaining Contractual Term	4 years 4 months 9 days	4 years 9 months 18 days	5 years 5 months 15 days
Exercisable, Weighted-Average Remaining Contractual Term	3 years 8 months 19 days	4 years 4 months 20 days	5 years 7 months 2 days
Outstanding, Aggregate Intrinsic Value	$ 2,278	$ 3,511	$ 13,425
Exercisable, Aggregate Intrinsic Value	$ 1,904	$ 2,315	$ 1,425

Earnings Per Share (Detail) - shares	12 Months Ended
Earnings Per Share (Detail) - shares	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS – Common Stock	36,720,749	36,448,138	36,031,792
Stock options under equity incentive plans	92,970	152,665	443,310
Weighted average number of shares for calculation of diluted EPS – Common Stock	36,813,719	36,600,803	36,475,102
Stock options outstanding for equity incentive plans
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock that have been excluded from the diluted shares calculation	2,055,784	1,314,784	17,534

Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Lease arrangements with related parties	$ 0
Outstanding capital lease agreements that exceed one year	0
Purchase obligations that exceed one year	0
Rent expense under company's operating leases	$ 8,424,000	$ 7,479,000	$ 6,660,000

Future Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2018	$ 10,630
2019	6,966
2020	3,629
2021	2,106
2022	1,916
2023 or later	3,811
Total	$ 29,058

Shareholder Rights Plan - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Class Of Warrant Or Right [Line Items]
Number of shares of preferred stock authorized \| shares	4,991,000
Stockholder rights plan expiration date	2019-01
Exercise price of preferred stock purchase right \| $ / shares	$ 20.00
Percentage of Common Stock ownership to make rights exercisable	15.00%
Series B Preferred Stock
Class Of Warrant Or Right [Line Items]
Preferred shares entitled to be purchased per right	0.001

Segment Reporting - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Customer	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Nov. 01, 2017 USD ($)
Segment Reporting Information [Line Items]
Goodwill	$ 69,685	$ 51,735	$ 27,765
Reimbursed research and development costs	12,037	6,660	9,607
Selling, general and administrative costs	130,522	115,252	95,456
Acquisition transaction expenses	$ 789	743
Number of customers \| Customer	3
United States
Segment Reporting Information [Line Items]
Number of customers \| Customer	2
Foreign
Segment Reporting Information [Line Items]
Number of customers \| Customer	1
Automotive Segments
Segment Reporting Information [Line Items]
Goodwill	$ 38,912	20,962
Industrial Segments
Segment Reporting Information [Line Items]
Goodwill	30,773	30,773
Reimbursed research and development costs	2,116	641	2,483
Selling, general and administrative costs	43,457	39,059	32,116
Acquisition transaction expenses	$ 789	$ 743	$ 0
Etratech Inc.
Segment Reporting Information [Line Items]
Date of acquisition	Nov. 01, 2017
Goodwill				$ 14,866

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Product revenues	$ 985,683	$ 917,600	$ 856,445
Depreciation and amortization	44,972	37,764	31,029
Operating income (loss)	97,324	106,119	121,319
Operating Segments \| Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	879,457	847,428	810,567
Depreciation and amortization	36,801	31,826	27,251
Operating income (loss)	166,604	174,027	170,358
Operating Segments \| Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	106,226	70,172	45,878
Depreciation and amortization	5,399	3,789	1,726
Operating income (loss)	(14,751)	(16,702)	(2,461)
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	2,772	2,149	2,052
Operating income (loss)	$ (54,529)	$ (51,206)	$ (46,578)

Segment Reporting (Detail) - USD ($) $ in Thousands	12 Months Ended
Segment Reporting (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Product revenues	$ 985,683	$ 917,600	$ 856,445
Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Product revenues	$ 454,669	$ 449,065	$ 393,206
United States \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	46.00%	49.00%	46.00%
China
Segment Reporting Information [Line Items]
Product revenues	$ 93,645	$ 80,493	$ 76,864
China \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	9.00%	9.00%	9.00%
Germany
Segment Reporting Information [Line Items]
Product revenues	$ 71,768	$ 70,258	$ 74,003
Germany \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	8.00%	9.00%
South Korea
Segment Reporting Information [Line Items]
Product revenues	$ 64,715	$ 75,396	$ 84,758
South Korea \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	8.00%	10.00%
Japan
Segment Reporting Information [Line Items]
Product revenues	$ 57,467	$ 45,103	$ 46,058
Japan \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	6.00%	5.00%	5.00%
Canada
Segment Reporting Information [Line Items]
Product revenues	$ 46,368	$ 37,954	$ 27,076
Canada \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	5.00%	4.00%	3.00%
Czech Republic
Segment Reporting Information [Line Items]
Product revenues	$ 38,828	$ 38,164	$ 28,273
Czech Republic \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	4.00%	3.00%
United Kingdom
Segment Reporting Information [Line Items]
Product revenues	$ 36,033	$ 28,540	$ 25,952
United Kingdom \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	3.00%	3.00%
Mexico
Segment Reporting Information [Line Items]
Product revenues	$ 22,684	$ 22,767	$ 28,274
Mexico \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	2.00%	2.00%	3.00%
Other
Segment Reporting Information [Line Items]
Product revenues	$ 99,506	$ 69,860	$ 71,981
Other \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	10.00%	8.00%	9.00%
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 531,014	$ 468,535	$ 463,239
Non U.S. \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	54.00%	51.00%	54.00%

Percentage of Total Product Revenues Generated from Customers (Detail) - Sales Revenue, Net - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Lear
Segment Reporting Information [Line Items]
Total product revenues in percentage	20.00%	21.00%	22.00%
Adient
Segment Reporting Information [Line Items]
Total product revenues in percentage	18.00%	21.00%	23.00%
Bosch
Segment Reporting Information [Line Items]
Total product revenues in percentage	8.00%	8.00%	9.00%

Pension and Other Post Retirement Benefit Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 USD ($) Payment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, amendment date	Dec. 04, 2017
Discount rate for net periodic service cost	3.25%	3.40%	3.25%
Discount rate for benefit obligation	2.95%	3.25%	3.40%
Insurance policy value	$ 2,353,000	$ 2,112,000
Tax (expense) benefit recognized in other comprehensive income	26,000	14,000	$ (23,000)
Pretax unrecognized actuarial losses recorded in accumulated other comprehensive income (loss)	380,000	302,000
Expected pretax unrecognized actuarial losses recorded in accumulated other comprehensive income (loss ) in next fiscal year	0
Contributions to 401(k) plan	$ 1,396,000	$ 1,289,000	$ 959,000
Gentherm GmbH
Defined Benefit Plan Disclosure [Line Items]
Discount rate for benefit obligation	1.93%	1.69%	2.21%
Tax (expense) benefit recognized in other comprehensive income	$ (86,000)	$ 171,000	$ (211,000)
Pretax unrecognized actuarial losses recorded in accumulated other comprehensive income (loss)	2,416,000	2,406,000
Expected pretax unrecognized actuarial losses recorded in accumulated other comprehensive income (loss ) in next fiscal year	74,000
Pension benefit obligation	4,036,000	4,000,000
Underfunded defined benefit plan	4,036,000	$ 4,000,000
Defined benefit plan, expected employer contribution in next fiscal year	0
Former Chief Executive Officer
Defined Benefit Plan Disclosure [Line Items]
Annual retirement payment	$ 300,000,000
Number of expected annual retirement benefit payments \| Payment	15
Annual retirement benefit payments, earliest date	Jan. 01, 2018
Former Chief Executive Officer \| Plan Amendment
Defined Benefit Plan Disclosure [Line Items]
Expected annual retirement payments	$ 342,000,000
Defined benefit plan amendment description	On May 10, 2017 the Company amended (the “Plan Amendment”) the Plan. Prior to the Plan Amendment, the Plan provided for 15 annual retirement benefit payments of $300,000 each beginning January 1, 2018. Mr. Coker became fully vested in the benefits under the Benefit Plan on April 1, 2017. The Plan Amendment provided that if Mr. Coker continued to provide employment service to the Company through and including January 1, 2018, the fifteen annual retirement benefit payments would be increased to $342,000, otherwise the 15 annual retirement benefits would remain at $300,000.
Former Chief Executive Officer \| Retirement Agreement
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan amendment description	On June 28, 2017, the same day a leader transition plan leading up to Mr. Coker’s retirement was announced, the Company entered into a Retirement Agreement with Mr. Coker (the “Retirement Agreement”). The Retirement Agreement provided that if Mr. Coker’s retirement date was prior to January 1, 2018, the Company would amend the terms of the Plan, as amended, to accelerate the in-service vesting date to ensure an increase in the annual accrued benefit from $300,000 to $342,000. Mr. Coker became fully vested in the incremental benefit, as described in the Plan Amendment, on December 4, 2017.
Annual accrued benefit payments	$ 300,000,000
Expected annual accrued benefit payments	$ 342,000,000

Benefit Obligation, Amounts Recognized Company's Financial Statements and Principal Assumptions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in projected benefit obligation:
Benefit obligation at beginning of year	$ 3,419	$ 2,898
Service cost	101	387	$ 379
Interest cost	111	98	80
Actuarial (gain) loss	78	36
Prior service cost	509
Benefit obligation at end of year	4,218	3,419	2,898
Gentherm GmbH
Change in projected benefit obligation:
Benefit obligation at beginning of year	7,326	6,980
Interest cost	130	154	142
Paid pension distributions	(272)	(261)
Actuarial (gain) loss	(257)	691
Exchange rate impact	1,000	(238)
Prior service cost			572
Benefit obligation at end of year	$ 7,927	$ 7,326	$ 6,980

Components of Net Periodic Pension Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 101	$ 387	$ 379
Interest cost	111	98	80
Amortization of actuarial loss (gains)			27
Amortization of prior service cost	509
Net periodic benefit cost	721	485	486
Gentherm GmbH
Defined Benefit Plan Disclosure [Line Items]
Interest cost	130	154	142
Return on plan assets	(121)	(125)	(126)
Amortization of actuarial loss (gains)	78	48	59
Amortization of prior service cost			572
Net periodic benefit cost	$ 87	$ 77	$ 647

Pretax Amounts Recognized in Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Actuarial Losses/(gains)	$ 78	$ 36	$ (35)
Amortization of actuarial losses			(27)
Establish prior service cost	509
Amortization prior service cost	(509)
Pretax amounts recognized in other comprehensive (loss) income	78	36	(62)
Gentherm GmbH
Defined Benefit Plan Disclosure [Line Items]
Actuarial Losses/(gains)	(229)	718	(154)
Amortization of actuarial losses	(78)	(48)	(59)
Amortization prior service cost			(572)
Pretax amounts recognized in other comprehensive (loss) income	$ (307)	$ 670	$ (785)

Fair Value of Plan Assets (Detail) - Gentherm GmbH - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Change in plan assets:
Plan assets at beginning of year	$ 3,326	$ 3,333
Actual return on plan assets	121	125
Contributions	272	261
Paid pension distributions	(272)	(261)
Actuarial losses	(28)	(27)
Exchange rate impact	472	(105)
Plan assets at end of year	$ 3,891	$ 3,326

Actuarial Assumptions Used to Determine Benefit Obligation and Net Periodic Service Cost (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.95%	3.25%	3.40%
Gentherm GmbH
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.93%	1.69%	2.21%
Expected long term rate of return on plan assets	3.40%	3.40%	3.70%

Schedule of Expected Pension Payments (Detail) - Gentherm GmbH $ in Thousands	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2018	$ 293
2019	291
2020	289
2021	287
2022	283
2023 - 2027	1,392
Total	$ 2,835

Fair Value Measurement - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	$ 0	$ 0
Financial liabilities, fair value	0	0
Carrying value	144,669,000	171,525,000
Changes to fair value of assets, realized	0	0
DEG Vietnam Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	13,750,000	15,000,000
Fair value	13,600,000	14,900,000
DEG China Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	1,919,000	2,525,000
Fair value	$ 2,000,000	$ 2,600,000

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2008	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Maximum length of time to hedge exposure to foreign currency exchange risk			1 year
Maximum length of time to hedge exposure to price fluctuations in material commodities			2 years
One-time pre-tax gain			$ 2,180,000	$ (1,762,000)
Final cash settlement payment					$ 7,593,000
Foreign Currency Derivatives
Derivative [Line Items]
Notional Value			29,273,000	29,538,000
Commodity Derivatives
Derivative [Line Items]
Notional Value			404,000	407,000
One-time pre-tax gain			256,000	77,000
Interest Rate Swap
Derivative [Line Items]
Hedge Ineffectiveness Incurred			$ 0	$ 0
Interest Rate Swap \| Automotive Segments
Derivative [Line Items]
Derivative maturity period	10 years
Currency Related Swap
Derivative [Line Items]
One-time pre-tax gain		$ 9,949,000
Final cash settlement payment		$ 7,593,000

Information Related to Recurring Fair Value Measurement of Derivative Financial Instruments in Our Consolidated Balance Sheet (Detail) - Fair Value, Inputs, Level 2 - Designated as Hedging Instrument - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	$ (909)
Foreign Currency Derivatives \| Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	141
Foreign Currency Derivatives \| Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	(1,050)	$ (1,395)
Net Asset/ (Liabilities)		(1,395)
Commodity Derivatives \| Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	72	18
Net Asset/ (Liabilities)	$ 72	$ 18

Information Related to Effect of Derivative Instrument's on Our Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 2,180	$ (1,762)
Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	256	77
Other comprehensive (loss) income \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	302	(1,395)
Other comprehensive (loss) income \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	54	743
Product Revenues \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(3)
Cost of sales \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	2,209	(608)
Cost of sales \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	202	(666)
Selling, general and administrative expense \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(216)	139
Foreign currency gain \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ (112)	$ 102

New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 01, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment directly to retained earnings				$ 1,496
ASU 2016-16 \| Scenario, Forecast
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment directly to retained earnings		$ 27,771
ASU 2016-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment directly to retained earnings	$ 1,496		$ 1,496
ASU 2014-09 \| Scenario, Forecast
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative-effect adjustment directly to retained earnings		$ 3,600

Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Other comprehensive income (loss) before reclassifications

$ (69,091)

$ (51,670)

$ (25,743)

50,602

(18,598)

(27,738)

Income tax effect of other comprehensive income (loss) before reclassifications

(575)

788

365

Amounts reclassified from accumulated other comprehensive income (loss) into net income

(1,943)

593

1,966

Income taxes reclassified into net income

563

(204)

(520)

48,647

(17,421)

(25,927)

Defined Benefit Pension Plans

(20,444)

(69,091)

(51,670)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

(2,550)

(2,060)

(2,673)

166

(723)

761

Income tax effect of other comprehensive income (loss) before reclassifications

(60)

185

(234)

Amounts reclassified from accumulated other comprehensive income (loss) into net income

184

(490)

613

Foreign Currency Translation Adjustments

(2,366)

(2,550)

(2,060)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

(65,762)

(49,381)

(23,060)

48,059

(16,678)

(25,904)

Income tax effect of other comprehensive income (loss) before reclassifications

148

297

(417)

48,207

(16,381)

(26,321)

Commodity Hedge Derivatives

(17,555)

(65,762)

(49,381)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

241

(229)

254

154

(849)

Income tax effect of other comprehensive income (loss) before reclassifications

(93)

(57)

543

Amounts reclassified from accumulated other comprehensive income (loss) into net income

^[1]

(199)

589

124

Income taxes reclassified into net income

(216)

(47)

470

(229)

Foreign Currency Hedge Derivatives

277

241

(229)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

(1,020)

(10)

2,123

(1,351)

(1,746)

Income tax effect of other comprehensive income (loss) before reclassifications

(570)

363

473

Amounts reclassified from accumulated other comprehensive income (loss) into net income

^[1]

(1,822)

(44)

1,756

Income taxes reclassified into net income

489

(473)

220

(1,020)

$ 10