Income Taxes - Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Roll Forward
Beginning Balance	$ 35,652	$ 32,209	$ 30,581
Additions based on tax positions related to the current year	7,495	9,274	4,667
Additions for prior year tax positions	4,952	39
Reductions for prior year tax positions	(5,633)	(5,870)	(3,039)
Ending Balance	$ 42,466	$ 35,652	$ 32,209