Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Examination
One-time non-cash charge related to TCJA	$ 600
Provisional income tax expense related to TCJA		$ 13,200
Net operating loss and interest carryforwards - foreign	1,300
Valuation allowance	1,261	0
Accrued interest and penalties related to taxes	200	200	$ 200
Unrecognized tax benefits, net of federal income tax benefits	3,900	3,700	$ 2,900
Federal
Income Tax Examination
Taxes payable		2,300
Income taxes receivable	10,200
State
Income Tax Examination
Taxes payable		1,700
Income taxes receivable	400
Foreign
Income Tax Examination
Taxes payable	600
Income taxes receivable		500
Deferred tax liabilities	8,500	7,800
Valuation allowance	$ 1,300
Tax Authority, Italy | Foreign
Income Tax Examination
Valuation allowance		800
Decrease in deferred tax assets, valuation allowance		$ 800