Income Taxes (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) countries	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Income Tax Disclosure [Line Items]
Number of countries in which operations constitute a taxable presence | countries	18
Net increase (decrease) in valuation allowance	$ (900)
Tax rates	35.00%	35.00%	35.00%
Net operating loss carryforwards	$ 143,000
Net operating loss carryforwards, deferred tax asset	27,800
Net operating loss carryforwards, valuation allowance	19,700
Unrepatriated foreign earnings	1,600
Non-U.S. earnings that have been targeted for future repatriation	24,900
Income tax expense recorded due to expected repatriation of foreign earnings	1,100
Accumulated undistributed earnings intended to remain permanently invested	164,000
Recognized interest and penalties related to unrecognized tax benefits	(100)	$ (100)	$ 1,000
Accrued interest and penalties related to unrecognized tax benefits	300	400	400
Estimated range of change, net increase	100
Estimated range of change, net decrease	600
Taxes paid, net of refunds	23,400	18,300	17,600
Recognized current and deferred tax benefits	$ 14,029	42	32
China [Member]
Income Tax Disclosure [Line Items]
Tax rates	25.00%
Mexico [Member]
Income Tax Disclosure [Line Items]
Tax rates	30.00%
Switzerland [Member]
Income Tax Disclosure [Line Items]
Tax rates	8.00%
Valuation Allowance Deferred Tax Assets [Member]
Income Tax Disclosure [Line Items]
Net increase (decrease) in valuation allowance	$ (300)
Valuation Allowance due to Foreign Currency Translation [Member]
Income Tax Disclosure [Line Items]
Net increase (decrease) in valuation allowance	(400)
Tax Attributes With Limited Lives [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	$ 52,400
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	2016
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 23,000
Non-U.S. [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	41,400
Net deferred tax asset	12,308	10,672
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, 2022
United States [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	$ 45,400
Domestic Tax Authority [Member]
Income Tax Disclosure [Line Items]
Net deferred tax asset	45,369	82,531
Domestic Tax Authority [Member] | Research and Development [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward	7,900
German Tax Authority [Member]
Income Tax Disclosure [Line Items]
Payment to taxing authority to pursue litigation	14,500
Taxes and interest along with deferred tax assets adjusted with anticipation of settlement	$ 3,700	$ 6,400	$ 6,300