Accumulated Other Comprehensive Income - Summary of Additional Information on Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 202,023	$ 193,520	$ 191,555
Other comprehensive income (loss), net of tax:	2,428	(2,070)	(1,839)
Ending balance	213,146	202,023	193,520
Other comprehensive income, tax	1,269
Unrealized gain (loss) on derivative instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,285)	(1,483)	(1,088)
Other comprehensive income before reclassifications	2,164	(2,712)	(2,140)
(Gain) Loss reclassified to earnings	(1,163)	1,910	1,745
Other comprehensive income (loss), net of tax:	1,001	(802)	(395)
Ending balance	(1,284)	(2,285)	(1,483)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,816)	(2,548)	(1,104)
Other comprehensive income before reclassifications	1,427	(1,268)	(1,444)
(Gain) Loss reclassified to earnings	0	0	0
Other comprehensive income (loss), net of tax:	1,427	(1,268)	(1,444)
Ending balance	(2,389)	(3,816)	(2,548)
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(6,101)	(4,031)	(2,192)
Other comprehensive income before reclassifications	3,591	(3,980)	(3,584)
(Gain) Loss reclassified to earnings	(1,163)	1,910	1,745
Other comprehensive income (loss), net of tax:	2,428	(2,070)	(1,839)
Ending balance	$ (3,673)	$ (6,101)	$ (4,031)