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, 2019
Dec. 31, 2018
Increased (decreases) in unrecognized tax benefits as a result of:    
Beginning balance $ 4,297 $ 0
Acquired unrecognized tax position   3,786
Tax positions taken in the current year 873 1,835
Lapse of statute of limitations (1,303) (1,324)
Ending balance $ 3,867 $ 4,297