Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018	Jan. 01, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 4,435,203	$ 2,042,306	$ 1,338,191
Other comprehensive (loss) income before reclassifications	22,884	34,577	(35,390)
Amounts reclassified from accumulated other comprehensive income (loss)	(25,516)	1,774	2,645
Total changes in other comprehensive (loss) income	(2,632)	36,351	(32,745)
Cumulative effect adjustment for adoption of new accounting guidance				$ (40,310)	$ 9,229	$ 0
Balance	6,085,244	4,435,203	2,042,306
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(11,227)	(21,031)	(7,862)
Other comprehensive (loss) income before reclassifications	10,332	8,855	(13,169)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Total changes in other comprehensive (loss) income	10,332	8,855	(13,169)
Cumulative effect adjustment for adoption of new accounting guidance					949
Balance	(895)	(11,227)	(21,031)
On Available-For-Sale Debt Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(536)	(594)	(10)
Other comprehensive (loss) income before reclassifications	1,039	58	(584)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Total changes in other comprehensive (loss) income	1,039	58	(584)
Cumulative effect adjustment for adoption of new accounting guidance					0
Balance	503	(536)	(594)
On Equity Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0	25,069	17,531
Other comprehensive (loss) income before reclassifications	0	0	7,538
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Total changes in other comprehensive (loss) income	0	0	7,538
Cumulative effect adjustment for adoption of new accounting guidance					(25,069)
Balance	0	0	25,069
On Foreign Currency Forward Contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	12,422	(15,016)	11,514
Other comprehensive (loss) income before reclassifications		25,664	(29,175)
Amounts reclassified from accumulated other comprehensive income (loss)		1,774	2,645
Total changes in other comprehensive (loss) income		27,438	(26,530)
Cumulative effect adjustment for adoption of new accounting guidance					0
Balance		12,422	(15,016)
On Foreign Currency Forward Contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive (loss) income before reclassifications	11,513
Amounts reclassified from accumulated other comprehensive income (loss)	(25,516)
Total changes in other comprehensive (loss) income	(14,003)
Balance	(1,581)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	659	(11,572)	21,173
Total changes in other comprehensive (loss) income	(2,632)	36,351	(32,745)
Cumulative effect adjustment for adoption of new accounting guidance					$ (24,120)
Balance	$ (1,973)	$ 659	$ (11,572)