Quarterly report pursuant to Section 13 or 15(d)

Interest Rate Hedge Swaps (Details Textual)

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Interest Rate Hedge Swaps (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2012
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Designated as Hedging Instrument [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Loss on Fair Value Hedge Ineffectiveness, Net   $ (207) $ 0 $ (1,000) $ (582)
Not Designated as Hedging Instrument [Member] | Interest rate contract [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Loss recognized in earnings   $ 0      
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contract [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Loss recognized in earnings $ 351,807