Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021
Description Of Business And Summary Of Significant Accounting Policies Disclosure [Line Items]
Operating lease right-of-use assets	$ 41,314	$ 32,900	$ 0
Total operating lease liabilities	43,009	35,100
Accumulated deficit	$ (1,249,563)		(1,137,851)
Revision of Prior Period, Accounting Standards Update, Adjustment
Description Of Business And Summary Of Significant Accounting Policies Disclosure [Line Items]
Operating lease right-of-use assets		2,500
Build-to-suit lease assets		6,500
Build-to-suit lease liabilities		4,400
Deferred rent credit		$ 2,500
Adjustments for prior periods from adopting ASC 842
Description Of Business And Summary Of Significant Accounting Policies Disclosure [Line Items]
Accumulated deficit			$ 200