Convertible Senior Notes - Interest Costs Recognized on 2026 Notes (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Total interest expense recognized	$ 2,107	$ 2,077	$ 2,040	$ 2,008	$ 1,587	$ 2,223	$ 1,319	$ 0	$ 4,048	$ 6,125	$ 8,232	$ 5,129	$ 0
Convertible Debt | Convertible Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Contractual interest expense											1,179	756
Amortization of debt discount and issuance costs											7,053	4,372
Total interest expense recognized											$ 8,232	$ 5,128