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Income Taxes - Summary of Gross Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Roll Forward    
Beginning Balance $ 10,481 $ 10,252
Increases for prior year tax positions 1,706 2,500
Decreases related to settlements with taxing authorities   (2,271)
Ending Balance $ 12,187 $ 10,481