Debt - Convertible Senior Notes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Mar. 25, 2021 USD ($)	Oct. 20, 2020 USD ($)
Debt Instrument [Line Items]
Repayments of Senior Debt			$ 212,401,000	$ 0
Gain on extinguishment of convertible senior notes	$ 6,495,000	$ 0	68,848,000	$ 0
1.75% Convertible Senior Notes due 2023
Debt Instrument [Line Items]
Net Carrying Amount	0		0		$ 23,431,000
1.75% Convertible Senior Notes due 2023 | Senior Notes
Debt Instrument [Line Items]
Aggregate Principal Amount	0		0		23,512,000
Unamortized Debt Issuance Costs	0		0		81,000
Net Carrying Amount	0		0		23,431,000
0% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Aggregate Principal Amount	234,505,000		234,505,000
Net Carrying Amount	$ 232,511,000		$ 232,511,000		512,683,000
0% Convertible Senior Notes due 2025 | Senior Notes
Debt Instrument [Line Items]
Effective Interest Rate	0.42%		0.42%
Conversion Rate			13.7920
Aggregate Principal Amount	$ 234,505,000		$ 234,505,000		518,728,000		$ 661,250,000
Unamortized Debt Issuance Costs	1,994,000		1,994,000		6,045,000
Net Carrying Amount	232,511,000		232,511,000		512,683,000
Repayments of Senior Debt	29,382,000		212,402,000
Gain on extinguishment of convertible senior notes	6,495,000		68,848,000
0.5% Convertible Senior Notes Due 2027
Debt Instrument [Line Items]
Aggregate Principal Amount	575,000,000		575,000,000
Net Carrying Amount	$ 567,154,000		$ 567,154,000		565,474,000
0.5% Convertible Senior Notes Due 2027 | Senior Notes
Debt Instrument [Line Items]
Stated Cash Interest Rate	0.50%		0.50%
Effective Interest Rate	0.90%		0.90%
Conversion Rate			10.6920
Aggregate Principal Amount	$ 575,000,000		$ 575,000,000		575,000,000	$ 575,000,000
Unamortized Debt Issuance Costs	7,846,000		7,846,000		9,526,000
Net Carrying Amount	$ 567,154,000		$ 567,154,000		$ 565,474,000