Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Total interest expense	$ 1,603	$ 2,219	$ 5,291	$ 6,648
Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	736	822	2,379	2,465
Amortization of debt issuance costs	1,155	1,288	5,813	3,863
Total interest expense	1,891	2,110	8,192	6,328
1.75% Convertible Senior Notes due 2023 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	17	103	223	309
Amortization of debt issuance costs	5	38	81	113
Total interest expense	22	141	304	422
0% Convertible Senior Notes due 2025 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	0	0	0	0
Amortization of debt issuance costs	590	690	4,052	2,070
Total interest expense	590	690	4,052	2,070
0.5% Convertible Senior Notes Due 2027 | Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	719	719	2,156	2,156
Amortization of debt issuance costs	560	560	1,680	1,680
Total interest expense	$ 1,279	$ 1,279	$ 3,836	$ 3,836