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Income Taxes - Schedule of Unrecognized Tax Benefits (Excluding Interest and Federal Income Tax Benefit of Unrecognized State Tax Benefits) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Balance at beginning of year $ 324 $ 434 $ 465
Additions based on tax positions related to the current year 3 0 58
Reductions for tax positions of prior years 0 0 0
Reductions due to the statute of limitations (101) (110) (89)
Settlements 0 0 0
Balance at end of year $ 226 $ 324 $ 434