Debt - Schedule of Convertible Senior Notes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 19, 2020	May 15, 2020	Oct. 09, 2019	Sep. 09, 2019	Jul. 03, 2018	Dec. 12, 2016
Debt Instrument [Line Items]
Interest Expense	$ 191,910,000	$ 155,227,000	$ 101,792,000
Convertible Debt
Debt Instrument [Line Items]
Aggregate Principal Amount	1,672,180,000
Unamortized Debt Discount and Debt Issuance Costs	352,956,000	498,227,000
Fair Value	2,451,348,000	5,333,849,000
Contractual Coupon Interest	29,880,000	33,789,000	18,749,000
Amortization of Debt Discount	89,238,000	97,058,000	48,297,000
Amortization of Debt Issuance Costs	3,871,000	5,343,000	3,800,000
Interest Expense	122,989,000	136,190,000	70,846,000
Convertible Debt | 1.375% convertible senior notes due 2026
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 498,800,000						$ 500,000,000
Stated Interest Rate	1.375%
Effective Interest Rate	8.10%
Unamortized Debt Discount and Debt Issuance Costs	$ 130,027,000	152,434,000
Fair Value	781,191,000	1,508,675,000
Contractual Coupon Interest	6,862,000	6,876,000	2,139,000
Amortization of Debt Discount	21,523,000	19,893,000	5,869,000
Amortization of Debt Issuance Costs	527,000	486,000	144,000
Interest Expense	28,912,000	27,255,000	8,152,000
Convertible Debt | 2.75% convertible senior notes due 2025
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 564,998,000			$ 65,000,000	$ 500,000,000
Stated Interest Rate	2.75%			2.75%	2.75%
Effective Interest Rate	10.32%
Unamortized Debt Discount and Debt Issuance Costs	$ 121,493,000	150,112,000
Fair Value	724,610,000	1,168,855,000
Contractual Coupon Interest	15,536,000	9,689,000	0
Amortization of Debt Discount	27,168,000	15,585,000	0
Amortization of Debt Issuance Costs	1,450,000	832,000	0
Interest Expense	44,154,000	26,106,000	0
Convertible Debt | 0.75% convertible senior notes due 2024
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 608,382,000					$ 73,000,000	$ 600,000,000
Stated Interest Rate	0.75%					0.75%
Effective Interest Rate	7.68%
Unamortized Debt Discount and Debt Issuance Costs	$ 101,436,000	148,727,000
Fair Value	945,547,000	2,023,280,000
Contractual Coupon Interest	4,663,000	5,034,000	1,539,000
Amortization of Debt Discount	32,589,000	32,618,000	9,482,000
Amortization of Debt Issuance Costs	1,116,000	1,117,000	325,000
Interest Expense	38,368,000	38,769,000	11,346,000
Convertible Debt | 1.50% convertible senior notes due 2023
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 0							$ 373,800,000
Stated Interest Rate	1.50%
Effective Interest Rate	6.99%
Unamortized Debt Discount and Debt Issuance Costs	$ 0	46,954,000
Fair Value	0	633,039,000
Contractual Coupon Interest	2,819,000	5,606,000	5,606,000
Amortization of Debt Discount	7,958,000	15,142,000	14,047,000
Amortization of Debt Issuance Costs	778,000	1,479,000	1,374,000
Interest Expense	11,555,000	22,227,000	21,027,000
Convertible Debt | 2.0% convertible senior notes due 2021
Debt Instrument [Line Items]
Aggregate Principal Amount									$ 460,000,000
Stated Interest Rate									2.00%
Contractual Coupon Interest	0	6,350,000	9,200,000
Amortization of Debt Discount	0	13,820,000	18,899,000
Amortization of Debt Issuance Costs	0	1,429,000	1,957,000
Interest Expense	0	21,599,000	30,056,000
Convertible Debt | 2.75% convertible senior notes due 2020
Debt Instrument [Line Items]
Contractual Coupon Interest	0	234,000	265,000
Amortization of Debt Discount	0	0	0
Amortization of Debt Issuance Costs	0	0	0
Interest Expense	$ 0	$ 234,000	$ 265,000