Real Estate Securities (Schedule of Certain Information Regarding Real Estate Securities) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Agency RMBS [Member]
Greater than 5 years
Fair Value	$ 182,288,689	[1]	$ 69,760,032	[1]
Amortized Cost	181,297,930	[1]	67,526,161	[1]
Weighted Average Yield	3.05%	[1]	3.38%	[1]
Fair Value	182,288,689	[1]	69,760,032	[1]
Amortized Cost	181,297,930	[1]	67,526,161	[1]
Weighted Average Yield	3.05%	[1]	3.38%	[1]
Non-Agency RMBS [Member]
Greater than 5 years
Fair Value	273,639,784	[1]	100,911,651	[1]
Amortized Cost	261,894,501	[1]	91,312,484	[1]
Weighted Average Yield	5.97%	[1]	7.63%	[1]
Fair Value	273,639,784	[1]	100,911,651	[1]
Amortized Cost	$ 261,894,501	[1]	$ 91,312,484	[1]
Weighted Average Yield	5.97%	[1]	7.63%	[1]

[1] Actual maturities of real estate securities are generally shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal.