Deferred Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Postemployment Benefits [Abstract]

Summary of Changes in Deferred Compensation Plan Liability

A summary of changes in the deferred compensation plan liability follows:

	2017			2016			2015
Balance, beginning of year	$	2,080		$	1,226		$	1,087
Deferrals, dividends, and changes in fair value recorded as an expense		444			936			209
Deferred compensation payments		(21	)		(82	)		(70	)
Balance, end of year	$	2,503		$	2,080		$	1,226