Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Currently (receivable) payable [Abstract]
Federal	[1]		$ (9,071)	$ 15,513	$ 12,145
State			205	642	2,631
Foreign			23,187	25,254	19,168
Current income tax (expense), total			14,321	41,409	33,944
Deferred expense (benefit) [Abstract]
Federal			3,977	18,458	7,630
State			3,164	215	1,656
Foreign			2,703	(1,259)	1,142
Deferred income tax (expense), total			9,844	17,414	10,428
Income taxes			24,165	58,823	$ 44,372
Transition tax for accumulated foreign earnings, Income tax (benefit) expense			(3,900)	7,400
Transition tax for accumulated foreign earnings, Liability, Noncurrent		$ 5,100	0	5,100
Deferred tax assets [Abstract]
Benefit plans		8,440	6,788	8,440
Liabilities and reserves		11,141	12,563	11,141
Operating loss and credit carryovers		40,164	65,392	40,164
Other		1,007	1,404	1,007
Gross deferred tax assets		60,752	86,147	60,752
Valuation allowance		(38,366)	(50,702)	(38,366)
Deferred tax assets		22,386	35,445	22,386
Deferred tax liabilities [Abstract]
Property, plant and equipment		(12,458)	(29,372)	(12,458)
Goodwill		(20,345)	(21,372)	(20,345)
Other		(422)	(4,488)	(422)
Deferred tax liabilities		(33,225)	(55,232)	(33,225)
Net deferred tax liabilities		(10,839)	(19,787)	$ (10,839)
2017 Tax Act [Abstract]
Provisional income tax expense		18,400
Provisional income tax expense, change in amount			(6,600)
Income tax expense			$ 11,800
Effective tax rate reconciliation [Abstract]
Taxes at statutory rate			21.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit			1.10%	0.30%	1.40%
Tax credits			(1.50%)	(1.10%)	(1.80%)
Taxes on foreign earnings			(0.40%)	0.20%	(4.40%)
Global Intangible Low-Taxed Income			0.60%	0.00%	0.00%
Resolution of prior years' tax matters			(0.30%)	0.10%	0.00%
U.S. manufacturing deduction			(0.00%)	(1.40%)	(2.00%)
Valuation allowance adjustments			0.40%	0.00%	(0.30%)
2017 Tax Legislation			(0.037)	0.124	0.000
Loss on foreign branch remittances			0.00%	(5.20%)	0.00%
U.S. tax accounting method changes			(2.90%)	0.00%	0.00%
Other, net			(1.00%)	(0.70%)	(1.40%)
Effective tax rate			13.30%	39.60%	26.50%
Earnings from continuing operations before income taxes [Abstract]
United States			$ 80,641	$ 88,479	$ 96,963
Foreign			100,884	59,944	70,322
Total			181,525	148,423	167,285
Reconciliation of change in liability for unrecognized tax benefits [Roll Forward]
Balance at beginning of year			6,276	4,947
Increases for tax positions taken in the current year			834	871
Increases for tax positions taken in prior years			271	553
Decreases related to settlements with tax authorities			(177)	(76)
Decreases as a result of lapse of the applicable statutes of limitations			(920)	(607)
Foreign currency exchange rate changes			(258)	588
Balance at the end of year		6,276	6,026	6,276	$ 4,947
Income tax uncertainties [Abstract]
Unrecognized tax benefits that would impact the effective tax rate, if recognized			4,800
Income tax interest and penalties accrued		$ 500	500	$ 500
Expected decrease in liability for unrecognized tax benefits in the next fiscal year			900
Unrecognized tax benefits that would impact the effective tax rate in the next fiscal year			900
Undistributed earnings			553,000
Withholding of tax liability			24,900
Foreign [Member]
Operating Loss Carryforwards [Abstract]
Operating loss carryovers			122,900
Operating loss carryovers, subject to expiration			25,200
Operating loss carryovers, not subject to expiration			97,700
State [Member]
Operating Loss Carryforwards [Abstract]
Operating loss carryovers			138,400
Operating loss carryovers, subject to expiration			$ 137,300

[1] In 2018 and 2017, this amount includes $(3.9) million and $7.4 million, respectively, of income tax (benefit) expense related to the one-time transition tax on earnings of foreign subsidiaries enacted by the 2017 Tax Legislation (See discussion below). There was no liability for this amount recorded as of December 31, 2018. As of December 31, 2017, $5.1 million of this amount was reported in Other liabilities on the Consolidated Balance Sheet.