Accumulated Other Comprehensive Loss (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 318,026
Ending Balance	347,950
Foreign currency translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,636)
Other comprehensive (loss)/income before reclassifications	(496)
Amounts reclassified from accumulated other comprehensive loss	0
Net current period other comprehensive (loss)/income	(496)
Ending Balance	(4,132)
Net unrealized gain on derivatives, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	987
Other comprehensive (loss)/income before reclassifications	1,664
Amounts reclassified from accumulated other comprehensive loss	(175)
Net current period other comprehensive (loss)/income	1,489
Ending Balance	2,476
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,649)
Other comprehensive (loss)/income before reclassifications	1,168
Amounts reclassified from accumulated other comprehensive loss	(175)
Net current period other comprehensive (loss)/income	993
Ending Balance	$ (1,656)