Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Valuation allowance	$ 6,734		$ 6,418	$ 6,734
Valuation allowance decreased			300
Net current period other comprehensive income (loss)			$ (10)	$ (126)	$ 394
Tax at federal statutory rate			21.00%	21.00%	35.00%
Tax Cuts and Jobs Act of 2017 - provisional income tax expense		$ 48,300	$ 6,500	$ 6,500
Tax Cuts and Jobs Act of 2017 - provisional income tax expense related to remeasurement of DTA		26,600
Tax Cuts and Jobs Act of 2017 - provisional income tax expense, deemed repatriation of foreign earnings		$ 21,700
Tax Cuts And Jobs Act Of 2017 - provisional income tax expense, adjustment	6,700
Tax Cuts and Jobs Act of 2017, deferred tax liabilities, undistributed foreign earnings, Global Intangible Low-Taxed Income, Foreign Derived Intangible Income and Base Erosion and Anti-abuse (GILTI, FDII and BEAT)			1,700
Possible reduction in liabilities for uncertain tax positions			600
Unrecognized tax benefits that would impact effective tax rate			6,700
Unrecognized tax benefits, income tax penalties and interest expense			(1,400)	100	$ (400)
Unrecognized tax benefits, income tax penalties and interest accrued	$ 3,400		2,000	$ 3,400
Undistributed earnings			5,100
Associated tax without consideration of foreign tax credit			1,100
US Federal
Income Tax Disclosure [Line Items]
Operating loss carryforwards			$ 6,000
Operating loss carryforwards expiration year			2021
State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Tax credit carryforwards			$ 900
ITALY | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2004
ITALY | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2012
GERMANY | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2014
GERMANY | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2016
UNITED KINGDOM | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2014
UNITED KINGDOM | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2017
UNITED KINGDOM | Tax Year 2015
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2015
UNITED KINGDOM | Tax Year 2016
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2016
FRANCE | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2015
FRANCE | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination			2016