Derivatives - Schedule of Other Comprehensive Income (Loss), Net of Tax, for Derivative Instruments Designated as Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Derivatives Fair Value [Line Items]
Amount of gain recognized in other comprehensive income, net of tax	$ 196	$ 1,469
Designated as Hedging
Derivatives Fair Value [Line Items]
Amount of gain recognized in other comprehensive income, net of tax	$ 196	$ 1,469