Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Income Tax Disclosure [Line Items]
Increase (decrease) in deferred tax asset valuation allowance		$ 3,300
Operating loss carryforwards	$ 2,800,000	2,800,000
Deferred tax asset. operating loss carryforward	589,067	589,067			$ 495,252
Earnings expected to be repatriated in next fiscal year	100,000	100,000
Deferred tax liability, undistributed foreign earnings	5,000	5,000			5,000
Undistributed foreign earnings	1,400,000	1,400,000
Other recorded liabilities for interest and penalties	300	300	$ 200		100
Income tax expense (benefit) related to interest and penalties	(100)	(100)	(100)		$ (100)
Provisional tax expense				$ 274,000
2017 Tax Act measurement adjustment			$ 135,700
Alternative minimum tax refund, CARES Act	18,500
Minimum
Income Tax Disclosure [Line Items]
Expected liability to be added for uncertain taxes during next twelve months	200	200
Maximum
Income Tax Disclosure [Line Items]
Expected liability to be added for uncertain taxes during next twelve months	$ 1,000	$ 1,000