Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Examination
Cash and cash equivalents	$ 62,896	$ 51,821
Deferred tax liabilities	39,291	53,832
Net operating loss carryforwards - foreign	10,100
Valuation allowance	1,054	2,809
Increase in deferred tax assets, valuation allowance	1,700
Accrued interest and penalties related to taxes	800	700	$ 400
Unrecognized tax benefits, net of federal income tax benefits	$ 20,500	$ 8,800	$ 7,900
Geographic Concentration Risk | Cash and Cash Equivalents | Int'l
Income Tax Examination
Consolidated risk, percentage	71.00%	66.00%
Federal
Income Tax Examination
Taxes payable	$ 8,500
Income taxes receivable		$ 7,200
State
Income Tax Examination
Taxes payable	1,600
Income taxes receivable		1,900
Foreign
Income Tax Examination
Taxes payable		1,800
Income taxes receivable	1,600
Deferred tax liabilities	26,200	17,300
Valuation allowance	900	$ 2,600
Tax Authority, UK
Income Tax Examination
Net operating loss carryforwards - foreign	1,200
Tax Authority, Italy
Income Tax Examination
Net operating loss carryforwards - foreign	2,400
Tax Authority, Hong Kong
Income Tax Examination
Net operating loss carryforwards - foreign	$ 6,500