Fair Value (Schedule of Quantitative Information about Level 3 Fair Value Measurements) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013
Non-Agency RMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 270,034,590	[1]
Alternative - A [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	112,066,781	[1]
Alternative - A [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	2.20%	[1]
Constant default rate	1.30%	[1]
Loss severity	0.70%	[1]
Delinquency	9.40%	[1]
Alternative - A [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	17.10%	[1]
Constant default rate	11.50%	[1]
Loss severity	67.90%	[1]
Delinquency	39.90%	[1]
Alternative - A [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	7.90%	[1]
Constant default rate	6.10%	[1]
Loss severity	40.60%	[1]
Delinquency	20.10%	[1]
Pay Option Adjustable Rate [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	27,680,063	[1]
Pay Option Adjustable Rate [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.20%	[1]
Constant default rate	2.80%	[1]
Loss severity	1.90%	[1]
Delinquency	8.70%	[1]
Pay Option Adjustable Rate [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	22.50%	[1]
Constant default rate	9.40%	[1]
Loss severity	84.10%	[1]
Delinquency	35.00%	[1]
Pay Option Adjustable Rate [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	9.00%	[1]
Constant default rate	5.30%	[1]
Loss severity	46.00%	[1]
Delinquency	16.70%	[1]
Prime [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	97,763,571	[1]
Prime [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	3.40%	[1]
Constant default rate	0.20%	[1]
Loss severity	3.80%	[1]
Delinquency	2.90%	[1]
Prime [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	22.60%	[1]
Constant default rate	9.00%	[1]
Loss severity	69.20%	[1]
Delinquency	29.20%	[1]
Prime [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	12.10%	[1]
Constant default rate	5.60%	[1]
Loss severity	38.30%	[1]
Delinquency	15.80%	[1]
Subprime [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	32,524,175	[1]
Subprime [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.10%	[1]
Constant default rate	3.10%	[1]
Loss severity	9.90%	[1]
Delinquency	12.90%	[1]
Subprime [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	14.30%	[1]
Constant default rate	16.40%	[1]
Loss severity	81.00%	[1]
Delinquency	30.70%	[1]
Subprime [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	4.30%	[1]
Constant default rate	5.60%	[1]
Loss severity	50.30%	[1]
Delinquency	20.00%	[1]
Mortgage Loans [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 120,783,425
Mortgage Loans [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	1.10%
Constant default rate	0.10%
Loss severity	13.90%
Delinquency	3.40%
Mortgage Loans [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	7.60%
Constant default rate	5.30%
Loss severity	42.80%
Delinquency	14.50%
Mortgage Loans [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Unobservable Input
Constant voluntary prepayment	3.50%
Constant default rate	4.00%
Loss severity	33.80%
Delinquency	13.50%

[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.