Debt (Details) $ / shares in Units, shares in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 08, 2022 USD ($)	Apr. 30, 2020 USD ($) $ / shares	Apr. 30, 2020 USD ($) D $ / shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Remaining borrowing capacity				$ 100,000,000.0		$ 100,000,000.0
Common Stock, Par or Stated Value Per Share | $ / shares				$ 0.0001		$ 0.0001		$ 0.0001
Common stock, shares issued | shares				97,300		97,300		95,140
Accrued Interest				$ 2,695,000		$ 2,695,000		$ 1,078,000
Amortization of debt discount and issuance cost						941,000	$ 917,000
Interest expense				2,330,000	$ 2,078,000	6,567,000	6,226,000
Subsequent event
Debt Instrument [Line Items]
Borrowings under credit facility	$ 30,000,000.0
Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 287,500,000	$ 287,500,000	287,500,000		$ 287,500,000
Proceeds from Convertible Note, net of issuance costs			$ 278,300,000
Per annum interest rate (as a percent)			2.25%			2.25%
Interest expense				$ 1,933,000	1,925,000	$ 5,793,000	5,769,000
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.0001	$ 0.0001
Debt instrument, term						7 years
Effective interest rate (as a percent)				2.72%		2.72%
Principal amount per convertible note			$ 1,000
Number of threshold consecutive trading days | D			30
Threshold business days | D			5
Conversion price (in dollars per share) | $ / shares		$ 38.79	$ 38.79
Initial conversion rate		25.7785
Convertible to shares of common stock		7,411,704
Percentage of principal amount converted		100.00%
Carrying value				$ 281,336,000		$ 281,336,000		280,394,000
5 consecutive trading day period | Convertible Notes
Debt Instrument [Line Items]
Threshold trading days | D			5
Percentage of conversion price			98.00%
20 trading days period | Convertible Notes
Debt Instrument [Line Items]
Threshold trading days | D			20
Percentage of conversion price			130.00%
Redeemable for cash on or after May 2024
Debt Instrument [Line Items]
Number of threshold consecutive trading days | D			20
Threshold trading days | D			30
Percentage of conversion price			130.00%
Percentage of principal amount converted			100.00%
Level 2 | Convertible Notes
Debt Instrument [Line Items]
Fair value of long-term debt				403,600,000		403,600,000		715,700,000
Line Of Credit-UBS
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 150,000,000.0	$ 50,000,000.0
Outstanding balance				50,100,000		50,100,000		50,100,000
Interest expense				200,000	$ 200,000	500,000	$ 500,000
Line Of Credit-UBS | Level 2
Debt Instrument [Line Items]
Fair value of long-term debt				$ 50,100,000		$ 50,100,000		$ 50,100,000
Line Of Credit-UBS | LIBOR
Debt Instrument [Line Items]
Spread on interest rate (as a percent)						1.10%
Line Of Credit-UBS | SOFR
Debt Instrument [Line Items]
Spread on interest rate (as a percent)						1.21%
2017 Term Loan
Debt Instrument [Line Items]
Debt, repayment amount			$ 79,200,000