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Immaterial Correction of Prior-Period Error (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Immaterial correction of prior-period error
Fair value, available-for-sale securities	$ 398,119	$ 441,186
Cash and cash equivalents	107,891	128,967
Marketable securities	377,718	373,682
Net cash used in investing activities	$ (115,655)	(97,573)	$ (141,474)
Adjustment
Immaterial correction of prior-period error
Fair value, available-for-sale securities		7,200
As originally reported
Immaterial correction of prior-period error
Cash and cash equivalents		136,100
Marketable securities		366,500
Net cash used in investing activities		$ (90,400)

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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