Derivatives (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Interest rate swap contract
Derivative [Line Items]
Derivative, notional amount	$ 40,000
Derivative, fixed interest rate	1.42%
Interest rate swap contract | LIBOR
Derivative [Line Items]
Derivative, variable rate	1.98%
Foreign currency forward contracts
Derivative [Line Items]
Derivative, notional amount	$ 16,300
Derivatives Designated as Hedging Instruments | Prepaids and other current assets | Interest rate swap contract
Derivative [Line Items]
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	$ 300