Convertible Senior Notes and Capped Call Transactions - Narrative (Details) $ / shares in Units, shares in Thousands		1 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 21, 2023 USD ($)	Dec. 31, 2020 USD ($) day shares	Mar. 31, 2019 USD ($) equity_instrument day $ / shares shares	Sep. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares
Debt Instrument [Line Items]
Debt instrument, repurchase amount	$ 149,700,000
Debt instrument, increase (decrease), net	157,500,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.001	$ 0.001			$ 0.001			$ 0.001	$ 0.001
Adjustments to additional paid in capital related to issuance costs attributable to equity component					$ 3,700,000
Net carry amount				$ 511,055,000			$ 511,055,000			$ 737,423,000
Number of shares of common stock covered by called caps (shares) | shares		6,880	5,960
Reduction to additional paid-in-capital related to called caps		$ 46,100,000	$ 23,200,000
Interest expense				800,000		$ 1,400,000	4,100,000	$ 4,100,000
2024 Notes
Debt Instrument [Line Items]
Principal Balance				72,000,000			72,000,000
Debt instrument, increase (decrease), net	$ 228,300,000
Gain (loss) on extinguishment of debt							7,200,000
Payment for debt extinguishment or debt prepayment cost							500,000
Debt instrument, convertible, carrying amount of equity component			52,900,000
Total deferred issuance costs			8,600,000
Debt issuance costs attributable to liability			6,600,000
Adjustments to additional paid in capital related to issuance costs attributable to equity component			$ 2,000,000
Net carry amount				72,200,000			72,200,000
Unamortized issuance costs				300,000			300,000
2026 Notes
Debt Instrument [Line Items]
Debt instrument, convertible, carrying amount of equity component										162,500,000
Total deferred issuance costs										12,200,000
Debt issuance costs attributable to liability										$ 8,500,000
Net carry amount				511,100,000			511,100,000
Unamortized issuance costs				6,400,000			6,400,000
Capped calls
Debt Instrument [Line Items]
Capped caps initial strike price (in dollars per share) | $ / shares			$ 38.58								75.23
Capped caps initial cap price (in dollars per share) | $ / shares			$ 57.16								$ 105.58
Convertible Debt | 2024 Notes
Debt Instrument [Line Items]
Principal Balance			$ 230,000,000	$ 72,500,000			$ 72,500,000
Debt instrument stated rate (percent)			0.75%
Proceeds from debt offering, net of debt issuance costs			$ 221,400,000
Debt instrument, unit of principal for conversion			$ 1,000
Number of shares per convertible note (in shares) | equity_instrument			25.9182
Convertible debt conversion price (in dollars per share) | $ / shares				$ 38.58			$ 38.58
Percentage of principal amount paid if repurchase due to fundamental change (percent)			100.00%
Threshold trading days in consideration of note conversion | day			20
Threshold consecutive trading days in analysis of conversion price | day			30
Threshold percentage of stock price if converted			130.00%
Threshold for five day period, product of sale price of common stock and conversion rate of notes			98.00%
Remaining amortization period for debt discount and debt issuance costs				4 months 24 days			4 months 24 days
Effective interest rate (percent)				0.0157%			0.0157%
Convertible Debt | 2026 Notes
Debt Instrument [Line Items]
Principal Balance											$ 517,500,000
Debt instrument stated rate (percent)											0.00%
Proceeds from debt offering, net of debt issuance costs									$ 505,300,000
Debt instrument, unit of principal for conversion											$ 1,000
Number of shares per convertible note (in shares)		13.2933
Convertible debt conversion price (in dollars per share) | $ / shares											$ 75.23
Percentage of principal amount paid if repurchase due to fundamental change (percent)		100.00%
Threshold trading days in consideration of note conversion | day		20
Threshold consecutive trading days in analysis of conversion price | day		30
Threshold percentage of stock price if converted		130.00%
Threshold for five day period, product of sale price of common stock and conversion rate of notes		98.00%
Remaining amortization period for debt discount and debt issuance costs				3 years 2 months 12 days			3 years 2 months 12 days
Effective interest rate (percent)				0.004%			0.004%