Derivative Instruments (Schedule of Fair Value of Derivative Instruments) (Details) (Not Designated as Hedging Instrument [Member], USD $)	Jun. 30, 2013		Dec. 31, 2012
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value	$ 7,169,531		$ (1,144,744)
TBAs [Member]
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value	$ (5,069,472)	[1]		[1]

[1] Fair value as of June 30, 2013 includes $1.4 million of unrealized loss on TBA contracts that have not been paired off as of June 30, 2013.