Debt - Convertible Senior Notes (Details) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
	Aug. 07, 2017 USD ($) $ / shares	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($) $ / shares $ / Item	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Aug. 01, 2017 $ / shares	Jan. 31, 2013 USD ($)
Debt
Payment for repurchase of debt instrument					$ 96,204	$ 165,131
Debt discount and issuance costs, net		$ (7,782)			(7,782)		$ (9,331)
2023 Notes
Debt
Loan amount		$ 96,200			$ 96,200
2025 Notes
Debt
Common stock price to current conversion price ratio					130.00%
Average trading price percentage					98.00%
2025 Notes | Common stock
Debt
Share Price | $ / shares								$ 13.28
2028 Notes
Debt
Debt instrument, covenant terms description					The indenture governing the 2028 Notes contains customary terms and covenants, including a merger covenant and that upon certain events of default occurring and continuing, either the Trustee or the holders of at least 25% of the aggregate principal amount of the outstanding Notes may declare 100% of the principal of, and accrued and unpaid interest, if any, on, all the Notes to be due and payable immediately.
Convertible senior notes | 2025 Notes
Debt
Ratio of repurchase price to the principal amount					100.00%
Effective interest rate		2.88%			2.88%
Principal		$ 192,500			$ 192,500		192,500
Debt discount and issuance costs, net		(1,385)			(1,385)		(1,917)
Net carrying amount		191,115			191,115		190,583
Interest expense
Contractual interest expense		1,203	$ 1,203		3,609	3,609
Amortization of debt issuance costs		179	174		532	517
Total interest and amortization expense		$ 1,382	1,377		$ 4,141	4,126
Convertible senior notes | 2025 Notes | Over-Allotment Option
Debt
Loan amount	$ 17,500
Portion of debt instrument face amount, Exercised	17,500
Convertible senior notes | 2025 Notes | Private Placement
Debt
Loan amount	$ 192,500
Debt Instrument, annual interest rate	2.50%
Convertible senior notes | 2025 Notes | Common stock
Debt
Conversion rate for shares of common stock per $1,000 principal	57.924
Conversion price (dollars per share) | $ / shares	$ 17.26
Debt instrument maturity date	Aug. 15, 2025
Conversion premium (as a percent)	30.00%
Convertible senior notes | 2028 Notes
Debt
Loan amount				$ 261,000
Debt instrument maturity date				Mar. 15, 2028
Proceeds from issuance of convertible notes, net of issuance costs				$ 252,600
Common stock price to current conversion price ratio				130.00%
Average trading price percentage				98.00%
Ratio of repurchase price to the principal amount				100.00%
Effective interest rate		2.70%			2.70%
Principal		$ 261,000			$ 261,000		261,000
Debt discount and issuance costs, net		(6,397)			(6,397)		(7,403)
Net carrying amount		254,603			254,603		253,597
Interest expense
Contractual interest expense		1,387	1,371		4,160	3,127
Amortization of debt issuance costs		340	328		1,006	735
Total interest and amortization expense		1,727	1,699		5,166	3,862
Convertible senior notes | 2028 Notes | Privately-negotiated capped call option
Debt
Cap price for the underlying number of shares (in dollars per share) | $ / Item				33.985
Purchases of capped calls in connection with convertible senior notes due 2028				$ 21,000
Convertible senior notes | 2028 Notes | Over-Allotment Option
Debt
Loan amount				45,000
Portion of debt instrument face amount, Exercised				$ 36,000
Convertible senior notes | 2028 Notes | Private Placement
Debt
Debt Instrument, annual interest rate				2.125%
Convertible senior notes | 2028 Notes | Common stock
Debt
Conversion rate for shares of common stock per $1,000 principal				38.1432
Conversion price (dollars per share) | $ / shares				$ 26.22
Convertible subordinated notes | 2023 Notes
Debt
Loan amount									$ 287,500
Debt Instrument, Repurchased Face Amount				$ 144,800
Payment for repurchase of debt instrument				$ 165,600
Principal		0			0		$ 96,204
Interest expense
Contractual interest expense		0	511		85	2,106
Amortization of debt issuance costs		0	59		11	240
Total interest and amortization expense		$ 0	$ 570		$ 96	$ 2,346