Repurchase Agreements (Schedule of Certain Information Regarding Repurchase Agreements) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance	$ 161,630,509	$ 66,639,090
Weighted Average Rate	0.44%	0.49%
Non-Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance	133,978,530	49,441,377
Weighted Average Rate	2.00%	2.15%
30 Days or Less [Member] | Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance	139,931,509	44,174,600
Weighted Average Rate	0.44%	0.49%
30 Days or Less [Member] | Non-Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance	133,978,530	49,441,377
Weighted Average Rate	2.00%	2.15%
31-60 Days [Member] | Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance		10,866,170
Weighted Average Rate		0.49%
31-60 Days [Member] | Non-Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance
Weighted Average Rate
61-90 Days [Member] | Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance	21,699,000	11,598,320
Weighted Average Rate	0.44%	0.47%
61-90 Days [Member] | Non-Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance
Weighted Average Rate
Greater Than 90 Days [Member] | Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance
Weighted Average Rate
Greater Than 90 Days [Member] | Non-Agency RMBS [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Balance
Weighted Average Rate