Income Taxes (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) countries	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Tax Disclosure [Line Items]
Number of countries in which operations constitute a taxable presence | countries	18
Net increase (decrease) in valuation allowance	$ (200)
Tax rates	21.00%	35.00%	35.00%
Federal tax rate of deferred tax assets and liabilities	21.00%
Net operating loss carryforwards	$ 103,200
Net operating loss carryforwards, deferred tax asset	23,100
Net operating loss carryforwards, valuation allowance	7,800
Provisional transition tax	1,600	$ 600
Current year and prior year earnings of Company's foreign operations	82,400
Foreign withholding taxes	3,000
Accumulated undistributed earnings intended to remain permanently invested	171,300
Recognized interest and penalties related to unrecognized tax benefits	200	200	$ 200
Accrued interest and penalties related to unrecognized tax benefits	100	400	300
Taxes paid, net of refunds	28,100	23,700	23,400
Reduction in provisional transition tax	1,000
Federal tax benefit attributable to adjustments discovered	10,700	1,881	$ 2,138
State tax charge	$ 100
Decreased in effective tax rate	0.90%
Foreign tax credits	$ 24,300
Foreign tax credits available	$ 2,400
Percentager of Foreign tax credits	2.30%
Foreign-derived intangible income deduction	$ 3,400
Percentage of decreased effective rate	0.60%
Net decrease in tax audit settlements	$ 1,600
Brazil [Member]
Income Tax Disclosure [Line Items]
Tax rates	34.00%
China [Member]
Income Tax Disclosure [Line Items]
Tax rates	25.00%
Mexico [Member]
Income Tax Disclosure [Line Items]
Tax rates	30.00%
Valuation Allowance Deferred Tax Assets [Member]
Income Tax Disclosure [Line Items]
Net increase (decrease) in valuation allowance	$ (6,600)
Credit refunded years	2018 to 2022
Valuation Allowance due to Foreign Currency Translation [Member]
Income Tax Disclosure [Line Items]
Net increase (decrease) in valuation allowance	$ (900)
Tax Attributes With Limited Lives [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	$ 31,700
Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Open tax years	2007
Earliest Tax Year [Member] | Research and Development [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards, expiration date	Jan. 01, 2025
Latest Tax Year [Member]
Income Tax Disclosure [Line Items]
Open tax years	2018
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 19,400
AMT credit carryforward [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	1,300
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	24,300
Net deferred tax asset	18,973	13,978
Non-U.S. [Member] | Research and Development [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	$ 1,200
Non-U.S. [Member] | Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards, expiration date	Jan. 01, 2020
United States [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	$ 36,100
Domestic Tax Authority [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	36,103	$ 45,097
Domestic Tax Authority [Member] | Research and Development [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	$ 6,200