Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-term debt was comprised of the following:

	As of December 31
	2017			2016
Total credit facility	$	300,000		$	300,000
Balance outstanding	$	76,300		$	89,100
Standby letters of credit	$	2,065		$	2,165
Amount available	$	221,635		$	208,735
Weighted-average interest rate	2.30		%	1.90		%
Commitment fee percentage per annum	0.25		%	0.25		%

Summary of Interest Rate Swaps Activity Recorded in Other Comprehensive Income Before Tax

Interest rate swaps activity recorded in other comprehensive earnings before tax included the following:

	Years Ended December 31,
	2017			2016		2015
Unrealized (loss) gain	$	(255	)	$	593	$	(516	)
Realized gain reclassified to interest expense	$	37		$	928	$	768