Income Taxes (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	$ 33,700
Foreign tax credit carry forwards	28,900
Valuation allowance increase (decrease)	(28,100)
Federal and state net operating loss carryforward	27,800
Second component of tax deductible goodwill, net of tax	1,300
Liability for uncertain tax positions	18,600
Accrued interest liability	4,600
Deferred tax asset, uncertain tax position	4,100
Interest expense (net of related deferred tax benefit)	1,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)	(9,900)
Net operating loss carry forwards	466,700
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	45,200
Valuation allowance increase (decrease)	(20,200)
Net operating loss carry forwards	$ 158,500