Notes Payable - General Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended
	Aug. 31, 2019	Jun. 30, 2015	Jun. 30, 2022	Dec. 31, 2021	Sep. 16, 2019	Apr. 15, 2019
Notes Payable
Proceeds from partial termination of convertible note hedges and note hedge warrants	$ 3,200
Convertible Note Hedge
Notes Payable
Conversion price (in dollars per share)						$ 14.51
2.25% Convertible Senior Notes due 2022 | Convertible Senior Notes
Notes Payable
Aggregate principal amount of notes issued		$ 335,700		$ 120,699
Net proceed received		324,000
Fees and expenses		11,700
Payments for convertible note hedges		$ 21,100
Stated interest rate (as a percent)		2.25%			2.25%
Debt redeemed/repurchased	215,000		$ 120,700
Debt redemption/repurchase price	227,300
Loss on extinguishment of debt	23,400
Initial debt issuance costs	$ 2,800