Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets		$ 144
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 161	$ 89
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Average notional amount	$ 9,642