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Deferred Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2020
Postemployment Benefits [Abstract]  
Summary of Changes in Deferred Compensation Plan Liability
A summary of changes in the deferred compensation plan liability follows:
December 31, 2020December 31, 2019December 31, 2018
Balance, beginning of year$3,234 $2,408 $2,503 
Deferrals, dividends, and changes in fair value(70)904 64 
Deferred compensation payments(79)(78)(159)
Balance, end of year$3,085 $3,234 $2,408