Fair Value Measurements (Details 3) (Fair Value, Inputs, Level 3 [Member], USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Non-Agency Rmbs [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 309,840,562		$ 255,043,557		$ 28,407,005
Fair Value Measurements, Valuation Techniques	Discounted Cash Flow		Discounted Cash Flow
Non-Agency Rmbs [Member] | Yield [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Yield		Yield
Non-Agency Rmbs [Member] | Yield [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	13.99%		9.60%
Non-Agency Rmbs [Member] | Yield [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	3.35%		4.43%
Non-Agency Rmbs [Member] | Yield [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.13%		5.90%
Non-Agency Rmbs [Member] | Projected Collateral Prepayments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Prepayments		Projected Collateral Prepayments
Non-Agency Rmbs [Member] | Projected Collateral Prepayments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	12.00%		9.00%
Non-Agency Rmbs [Member] | Projected Collateral Prepayments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		1.00%
Non-Agency Rmbs [Member] | Projected Collateral Prepayments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	3.51%		4.41%
Non-Agency Rmbs [Member] | Projected Collateral Losses [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Losses		Projected Collateral Losses
Non-Agency Rmbs [Member] | Projected Collateral Losses [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	30.00%		16.00%
Non-Agency Rmbs [Member] | Projected Collateral Losses [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.20%
Non-Agency Rmbs [Member] | Projected Collateral Losses [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	7.93%		2.03%
Non-Agency Rmbs [Member] | Projected Collateral Severities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Severities		Projected Collateral Severities
Non-Agency Rmbs [Member] | Projected Collateral Severities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	80.00%		75.00%
Non-Agency Rmbs [Member] | Projected Collateral Severities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		40.00%
Non-Agency Rmbs [Member] | Projected Collateral Severities [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	60.40%		55.27%
Abs [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	71,344,784		33,937,097		4,526,620
Fair Value Measurements, Valuation Techniques	Discounted Cash Flow		Discounted Cash Flow
Abs [Member] | Yield [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Yield		Yield
Abs [Member] | Yield [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.39%		7.05%
Abs [Member] | Yield [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	3.78%		4.66%
Abs [Member] | Yield [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	4.07%		5.77%
Abs [Member] | Projected Collateral Prepayments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description			Projected Collateral Prepayments
Abs [Member] | Projected Collateral Prepayments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			100.00%
Abs [Member] | Projected Collateral Prepayments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			20.00%
Abs [Member] | Projected Collateral Prepayments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			59.72%
Abs [Member] | Projected Collateral Losses [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description			Projected Collateral Losses
Abs [Member] | Projected Collateral Losses [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Abs [Member] | Projected Collateral Losses [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Abs [Member] | Projected Collateral Losses [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Abs [Member] | Projected Collateral Severities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description			Projected Collateral Severities
Abs [Member] | Projected Collateral Severities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Abs [Member] | Projected Collateral Severities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Abs [Member] | Projected Collateral Severities [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate			0.00%
Linked Transactions [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	14,723,169	[1]	6,425,683	[1]	5,277,317
Fair Value Measurements, Valuation Techniques	Discounted Cash Flow	[1]	Discounted Cash Flow	[1]
Linked Transactions [Member] | Yield [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Yield	[1]	Yield	[1]
Linked Transactions [Member] | Yield [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	9.01%	[1]	10.93%	[1]
Linked Transactions [Member] | Yield [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	3.85%	[1]	4.14%	[1]
Linked Transactions [Member] | Yield [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	4.71%	[1]	5.59%	[1]
Linked Transactions [Member] | Projected Collateral Prepayments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Prepayments	[1]	Projected Collateral Prepayments	[1]
Linked Transactions [Member] | Projected Collateral Prepayments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	12.00%	[1]	25.00%	[1]
Linked Transactions [Member] | Projected Collateral Prepayments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%	[1]	0.00%	[1]
Linked Transactions [Member] | Projected Collateral Prepayments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	2.43%	[1]	0.94%	[1]
Linked Transactions [Member] | Projected Collateral Losses [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Losses	[1]	Projected Collateral Losses	[1]
Linked Transactions [Member] | Projected Collateral Losses [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	30.00%	[1]	35.00%	[1]
Linked Transactions [Member] | Projected Collateral Losses [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%	[1]	0.00%	[1]
Linked Transactions [Member] | Projected Collateral Losses [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	12.83%	[1]	16.25%	[1]
Linked Transactions [Member] | Projected Collateral Severities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Severities	[1]	Projected Collateral Severities	[1]
Linked Transactions [Member] | Projected Collateral Severities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	80.00%	[1]	65.00%	[1]
Linked Transactions [Member] | Projected Collateral Severities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%	[1]	0.00%	[1]
Linked Transactions [Member] | Projected Collateral Severities [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	41.37%	[1]	34.32%	[1]
Commercial Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Credit Investments Interest Only [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	6,324,735		0
Fair Value Measurements, Valuation Techniques	Discounted Cash Flow
Credit Investments Interest Only [Member] | Yield [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Yield
Credit Investments Interest Only [Member] | Yield [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.72%
Credit Investments Interest Only [Member] | Yield [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.70%
Credit Investments Interest Only [Member] | Yield [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.71%
Credit Investments Interest Only [Member] | Projected Collateral Prepayments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Prepayments
Credit Investments Interest Only [Member] | Projected Collateral Prepayments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	100.00%
Credit Investments Interest Only [Member] | Projected Collateral Prepayments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	100.00%
Credit Investments Interest Only [Member] | Projected Collateral Prepayments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	100.00%
Credit Investments Interest Only [Member] | Projected Collateral Losses [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Losses
Credit Investments Interest Only [Member] | Projected Collateral Losses [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
Credit Investments Interest Only [Member] | Projected Collateral Losses [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
Credit Investments Interest Only [Member] | Projected Collateral Losses [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
Credit Investments Interest Only [Member] | Projected Collateral Severities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Severities
Credit Investments Interest Only [Member] | Projected Collateral Severities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
Credit Investments Interest Only [Member] | Projected Collateral Severities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
Credit Investments Interest Only [Member] | Projected Collateral Severities [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%
CMBS [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 23,972,043		$ 34,066,710		$ 0
Fair Value Measurements, Valuation Techniques	Discounted Cash Flow		Discounted Cash Flow
CMBS [Member] | Yield [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Yield		Yield
CMBS [Member] | Yield [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.75%		5.76%
CMBS [Member] | Yield [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	4.88%		2.23%
CMBS [Member] | Yield [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	5.51%		5.05%
CMBS [Member] | Projected Collateral Prepayments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Prepayments		Projected Collateral Prepayments
CMBS [Member] | Projected Collateral Prepayments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Prepayments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Prepayments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Losses [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Losses		Projected Collateral Losses
CMBS [Member] | Projected Collateral Losses [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Losses [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Losses [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Severities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements Unobservable Input Description	Projected Collateral Severities		Projected Collateral Severities
CMBS [Member] | Projected Collateral Severities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Severities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%
CMBS [Member] | Projected Collateral Severities [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Input Interest Rate	0.00%		0.00%

[1] Linked Transactions are comprised of unobservable inputs from Non-Agency RMBS and CMBS investments.