Revision of Prior Period Financial Statements - Schedule of Adjustments to Reconciliation of pre-tax net income (loss) to Adjusted EBITDA (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Other Significant Reconciling Item, Consolidated
Net income		$ 141,820	$ 8,122
Income tax expense (benefit)	$ 57,074	(10,058)	137,818
Non-cash foreign exchange transaction/translation (income) loss	3,438	(1,267)	(1,178)
Other items		117,633
Adjusted EBITDA	$ 415,038	459,218	435,162
As Reported
Segment Reporting, Other Significant Reconciling Item, Consolidated
Net income		144,273	10,791
Income tax expense (benefit)		(7,958)	138,603
Non-cash foreign exchange transaction/translation (income) loss		8	(2,181)
Other items		117,933
Adjusted EBITDA		465,346	437,613
Correction
Segment Reporting, Other Significant Reconciling Item, Consolidated
Net income		(2,453)	(2,669)
Income tax expense (benefit)		(2,100)	(785)
Non-cash foreign exchange transaction/translation (income) loss		(1,275)	1,003
Other items		(300)
Adjusted EBITDA		$ (6,128)	$ (2,451)