Income Taxes (Narrative) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Mar. 27, 2020	Jul. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit), CARES Act	$ 43,300
Valuation allowance			$ (188,100)	$ (76,300)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			13,989	2,104	$ 3,999
Decrease resulting from deferred tax assets				11,400	11,600
Income tax penalties and interest accrued			$ 400	5,700	$ 6,300
Unrecognized tax benefits that would impact effective tax rate				$ 3,400
Income Tax Expense (Benefit), CARES Act	$ 9,600
Italian Revenue Agency | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		$ 13,300