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Derivative Instruments; Fair Value (Details 1) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]        
Location of Gain (Loss) Recognized in Income on Derivative Interest Expense Interest Expense Interest Expense Interest Expense
Amount of Gain (Loss) Recognized in Income on Derivative - Interest Rate Contracts $ 0 $ 0 $ 0 $ 3,000
Amount of Gain (Loss) Recognized in Income on Derivative - Interest on fixed/variable rate variances $ 0 $ 21,000 $ 0 $ 63,000