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Deferred Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2019
Postemployment Benefits [Abstract]  
Summary of Changes in Deferred Compensation Plan Liability
A summary of changes in the deferred compensation plan liability follows:
 
2019
 
2018
 
2017
Balance, beginning of year
$
2,408

 
$
2,503

 
$
2,080

Deferrals, dividends, and changes in fair value recorded as an expense
904

 
64

 
444

Deferred compensation payments
(78
)
 
(159
)
 
(21
)
Balance, end of year
$
3,234

 
$
2,408

 
$
2,503