Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Interest Rates Swaps Which Was Not Designated As Cash Flow Hedge (Details 11)

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Fair Value Measurements and Derivatives - Effects of Interest Rates Swaps Which Was Not Designated As Cash Flow Hedge (Details 11) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Not Designated as Hedging Instrument | Interest Rate Swap        
Derivative Instruments Gain Loss [Line Items]        
Loss recognized in other expense $ (2)