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Derivative Instruments and Fair Value Measurements (Details 1) (Interest Rate Swap [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Amount of Loss Recognized in OCI on Derivative (Effective Portion)	$ (2,243,833)	$ (9,486,116)
Other Comprehensive Income (Loss) [Member]
Amount of Loss Recognized in OCI on Derivative (Effective Portion)	$ (2,243,833)	$ (9,486,116)

- Definition

The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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