Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-term debt was comprised of the following:

	As of
	June 30,			December 31,
	2018			2017
Total credit facility	$	300,000		$	300,000
Balance outstanding	$	57,000		$	76,300
Standby letters of credit	$	1,940		$	2,065
Amount available	$	241,060		$	221,635
Weighted-average interest rate	3.01		%	2.30		%
Commitment fee percentage per annum	0.25		%	0.25		%