Accumulated Other Comprehensive Loss (AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 3,340,180		$ 3,676,522	$ 3,084,038
Other comprehensive income before reclassifications	(84,783)		(362,001)	83,165
Amounts reclassified from AOCI	5,828		0	31,381
Tax effect	20,348		0	0
Total other comprehensive (loss) income	(58,607)		(362,001)	114,546
Ending Balance	3,711,616	[1]	3,340,180	3,676,522
Total Accumulated Other Comprehensive (Loss) Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(913,858)		(551,857)	(666,403)
Total other comprehensive (loss) income	(58,607)
Ending Balance	(972,465)		(913,858)	(551,857)
Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(913,858)		(551,857)	(666,403)
Other comprehensive income before reclassifications	(15,855)		(362,001)	83,165
Amounts reclassified from AOCI	0		0	31,381
Tax effect	0		0	0
Total other comprehensive (loss) income	(15,855)		(362,001)	114,546
Ending Balance	(929,713)		(913,858)	(551,857)
Unrealized (Losses) Gains on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0		0	0
Other comprehensive income before reclassifications	(68,928)		0	0
Amounts reclassified from AOCI	5,828		0
Tax effect	20,348		0	0
Total other comprehensive (loss) income	(42,752)		0	0
Ending Balance	$ (42,752)		$ 0	$ 0

[1] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using a modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 14.