Annual report pursuant to Section 13 and 15(d)

Income Taxes - Total Amounts of Unrecognized Tax (Detail)

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Income Taxes - Total Amounts of Unrecognized Tax (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 $ 3,867 $ 4,297
Acquired unrecognized tax position   0
Increased (decreased) in unrecognized tax benefits as a result of:    
Tax positions taken in the current year 2,391 873
Lapse of statute of limitations (55) (1,303)
Ending balance $ 6,203 $ 3,867