Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Examination
One-time non-cash charge related to TCJA	$ 600
Provisional income tax expense related to TCJA		$ 13,200
Deferred tax liabilities	35,740
Net operating loss carryforwards - foreign	2,600
Valuation allowance	1,662	1,261
Increase in deferred tax assets, valuation allowance	400
Net operating loss carryforwards - domestic	300
Deferred tax asset, interest limitation	4,400
Accrued interest and penalties related to taxes	400	200	$ 200
Unrecognized tax benefits, net of federal income tax benefits	7,900	3,900	$ 3,700
Federal
Income Tax Examination
Income taxes receivable	7,100
Taxes payable		10,200
State
Income Tax Examination
Income taxes receivable	4,600
Taxes payable		400
Foreign
Income Tax Examination
Income taxes receivable		600
Taxes payable	500
Deferred tax liabilities	9,700	8,500
Valuation allowance	1,700	$ 1,300
Tax Authority, UK
Income Tax Examination
Net operating loss carryforwards - foreign	1,700
Tax Authority, Italy
Income Tax Examination
Net operating loss carryforwards - foreign	$ 900