Debt - 2023. 2025 and 2027 Notes (Details) - USD ($) $ in Thousands					12 Months Ended
	Nov. 05, 2021	Nov. 11, 2020	May 18, 2020	Jan. 10, 2017	Dec. 31, 2021	Dec. 31, 2020	Nov. 17, 2020
Debt
Principal amount					$ 277,673	$ 389,195
Proceeds, net of issuance costs						120,095
Cash paid for repurchase of notes					115,604	81,240
Loss on extinguishment of debt					(4,029)	(7,841)
Purchase of capped calls			$ 10,300			10,313
Reduction of additional paid-in capital for extinguishment of equity component of note repurchased/exchanged					6,080	14,714
2023 Notes
Debt
Principal amount				$ 345,000	20,173	131,695
Interest rate (as a percent)				2.70%
Proceeds, net of issuance costs				$ 335,800
Repurchased and retired amount	$ 111,500	$ 125,000	88,300
Carrying amount of debt extinguished	105,500	113,100	78,100
Cash paid for repurchase of notes	115,600		81,200
Accrued and unpaid interest	1,000
Reduction of additional paid-in capital for extinguishment of equity component of note repurchased/exchanged	6,100	14,600	100
2023 Notes | Other income (expense), net
Debt
Loss on extinguishment of debt	$ 4,000	$ 4,800	3,000
2025 Notes
Debt
Principal amount					132,500	132,500	$ 132,500
Interest rate (as a percent)							3.50%
2027 Notes
Debt
Principal amount			$ 125,000		$ 125,000	$ 125,000
Interest rate (as a percent)			3.75%
Proceeds, net of issuance costs			$ 121,900