Income Taxes (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	$ 38,800
Foreign tax credit carry forwards	31,000
Valuation allowance increase (decrease)	(31,000)
Federal and state net operating loss carryforward	23,400
Second component of tax deductible goodwill, net of tax	1,300
Liability for uncertain tax positions	9,700
Accrued interest liability	2,700
Deferred tax asset, uncertain tax position	2,100
Interest expense (net of related deferred tax benefit)	600
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)	(7,800)
Net operating loss carry forwards	411,300
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	43,000
Valuation allowance increase (decrease)	(40,800)
Net operating loss carry forwards	$ 113,100