Fair Value (Schedule of Quantitative Information about Level 3 Fair Value Measurements) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Non-Agency RMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 196,552,996	[1]
Alternative - A [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	73,597,312	[1]
Alternative - A [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.80%	[1]
Constant default rate	0.50%	[1]
Loss severity	0.00%	[1]
Delinquency	1.40%	[1]
Alternative - A [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	40.40%	[1]
Constant default rate	9.50%	[1]
Loss severity	75.00%	[1]
Delinquency	29.40%	[1]
Alternative - A [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	17.20%	[1]
Constant default rate	3.10%	[1]
Loss severity	25.90%	[1]
Delinquency	9.90%	[1]
Pay Option Adjustable Rate [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	27,557,335	[1]
Pay Option Adjustable Rate [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.40%	[1]
Constant default rate	2.60%	[1]
Loss severity	1.10%	[1]
Delinquency	8.30%	[1]
Pay Option Adjustable Rate [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	20.40%	[1]
Constant default rate	8.00%	[1]
Loss severity	63.50%	[1]
Delinquency	33.00%	[1]
Pay Option Adjustable Rate [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	9.10%	[1]
Constant default rate	4.50%	[1]
Loss severity	40.70%	[1]
Delinquency	15.50%	[1]
Prime [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	77,775,713	[1]
Prime [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	2.50%	[1]
Constant default rate	1.50%	[1]
Loss severity	1.80%	[1]
Delinquency	5.70%	[1]
Prime [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	19.30%	[1]
Constant default rate	9.70%	[1]
Loss severity	59.00%	[1]
Delinquency	29.60%	[1]
Prime [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	10.10%	[1]
Constant default rate	4.80%	[1]
Loss severity	34.20%	[1]
Delinquency	13.70%	[1]
Subprime [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	17,622,636	[1]
Subprime [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.70%	[1]
Constant default rate	3.20%	[1]
Loss severity	6.40%	[1]
Delinquency	12.50%	[1]
Subprime [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	12.60%	[1]
Constant default rate	14.40%	[1]
Loss severity	80.30%	[1]
Delinquency	29.60%	[1]
Subprime [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	6.00%	[1]
Constant default rate	4.90%	[1]
Loss severity	45.70%	[1]
Delinquency	17.00%	[1]
Mortgage Loans [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 334,793,412
Mortgage Loans [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.20%
Constant default rate	0.20%
Loss severity	10.00%
Delinquency	2.30%
Mortgage Loans [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	7.50%
Constant default rate	4.70%
Loss severity	44.80%
Delinquency	13.00%
Mortgage Loans [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	3.60%
Constant default rate	3.30%
Loss severity	28.10%
Delinquency	11.20%

[1] The Company uses third-party dealer quotes to estimate fair value of some of its financial assets. The Company verifies selected prices by using a variety of methods, including comparing prices to internally estimated prices and corroborating the prices by reference to other independent market data, such as relevant benchmark indices and prices of similar instruments. Where the Company has disclosed unobservable inputs for broker quotes or comparable trades, those inputs are based on the Company's validations performed at the security level.