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Deferred Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Deferred Compensation Obligations $ 3,200 $ 2,600
Liability outstanding 299 362
Benefits paid 56 111
Charges to operations 31 37
Cash value 13,485 13,085
Increase in cash value 400  
Proceeds from life insurance 0 872
Gain on life insurance benefit $ 0 $ 158