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Convertible Senior Notes - Conversion (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	May 18, 2020	May 31, 2020	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 29, 2020	Mar. 31, 2018
Convertible Senior Notes
Net proceeds			$ 104,251	$ 122,886	$ 108,925
Conversion of convertible senior notes to common stock					$ 15,345
3.75% Convertible Senior Notes
Convertible Senior Notes
Principal amount	$ 200,000	$ 212,463	197,278	197,278			$ 12,500
Less initial purchasers' discount		(6,374)
Less initial purchasers' discount	(6,400)
Less cost of related capped calls		(16,253)
Less other issuance costs	$ (600)	(617)
Net proceeds		$ 189,219
Interest rate (as a percent)	3.75%	3.75%			3.75%	3.75%	3.75%	3.75%
Conversion of convertible senior notes to common stock			$ 0	$ 0

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Discount cost incurred related to the issuance of the debt.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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