Derivatives (Details 7) - Not designated as hedging - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Interest expense
Gains (losses) included in the Company's Consolidated Statements of Income and interest rate derivatives not designated as hedging instruments
Interest expense	$ 603	$ (1,065)
Foreign Exchange Contract | Other Income
Gains (losses) included in the Company's Consolidated Statements of Income and interest rate derivatives not designated as hedging instruments
Foreign currency derivative gains (losses) included in Other income, net	$ (112)	$ 0