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 12)

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Fair Value Measurements and Derivatives - Effects of Interest Rates Swaps Which Was Not Designated As Cash Flow Hedge (Details 12) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Not Designated as Hedging Instrument | Interest Rate Swap        
Derivative Instruments Gain Loss [Line Items]        
Loss recognized in other income (expense) $ (2)