Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Total interest expense	$ 1,766	$ 2,217	$ 3,688	$ 4,429
Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	822	822	1,644	1,644
Amortization of debt issuance costs	1,904	1,288	4,657	2,575
Total interest expense	2,726	2,110	6,301	4,219
1.75% Convertible Senior Notes due 2023 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	103	103	206	206
Amortization of debt issuance costs	38	38	75	75
Total interest expense	141	141	281	281
0% Convertible Senior Notes due 2025 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	0	0	0	0
Amortization of debt issuance costs	1,306	690	3,462	1,380
Total interest expense	1,306	690	3,462	1,380
0.5% Convertible Senior Notes Due 2027 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	719	719	1,438	1,438
Amortization of debt issuance costs	560	560	1,120	1,120
Total interest expense	$ 1,279	$ 1,279	$ 2,558	$ 2,558