Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details)

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Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details) (Interest Rate Swap, USD $)
Dec. 31, 2013
Dec. 31, 2012
Designated as Hedging Instrument | Other Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Interest rate swap instruments   $ 0
Designated as Hedging Instrument | Other Liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives 4,267,644 5,590,519
Not Designated as Hedging Instrument | Other Liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 0 $ 2,624,063