Derivative Financial Instruments and Hedging - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Unrealized gain (loss) on derivative contracts	$ 1,200
Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreement, current liability	253		$ 253		$ 1,163
Non-Designated | Foreign Exchange Forward
Derivative [Line Items]
Derivative term (in years)			1 year
Cash Flow Hedging | Designated | Foreign Currency Contracts
Derivative [Line Items]
Derivative term (in years)			2 years
Derivative instruments amounts reclassified into income	0	$ 0	$ 0	$ 0
Fair Value Hedging | Designated | Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreement, current liability	300		300
Accumulated other comprehensive loss	$ 200		$ 200