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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 72,338	$ 83,214	$ 93,461	$ 68,034
Additions based on tax positions related to the current year	3,134	4,493	15,580
Additions for tax positions of prior years	5,490	6,668	29,637
Reductions for tax positions of prior years	(3,599)	(9,217)	(5,226)
Settlements	(6,214)	(922)	(7,345)
Lapse of statutes	(9,687)	(11,269)	(7,219)
Unrecognized potential tax benefits that would impact effective tax rate	65,500
Potential interest and penalty expense (income)	(100)	(600)	$ 2,400
Accrued interest and penalties	17,800	$ 17,800
Minimum [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound	0
Maximum [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound	$ 30,900

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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