Real Estate Securities (Schedule of Information Regarding Real Estate Securities) (Details) (USD $)	3 Months Ended		6 Months Ended				12 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended		12 Months Ended			6 Months Ended		12 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 30-Year Adjustable Rate Mortgage [Member]		Dec. 31, 2012 30-Year Adjustable Rate Mortgage [Member]		Jun. 30, 2013 30-Year Fixed Rate Mortgage [Member]		Dec. 31, 2012 30-Year Fixed Rate Mortgage [Member]		Jun. 30, 2013 Alternative - A [Member]		Dec. 31, 2012 Alternative - A [Member]		Jun. 30, 2013 Interest-Only Securities [Member]	Jun. 30, 2013 Pay Option Adjustable Rate [Member]		Dec. 31, 2012 Pay Option Adjustable Rate [Member]		Jun. 30, 2013 Prime [Member]		Dec. 31, 2012 Prime [Member]		Jun. 30, 2013 Subprime [Member]		Dec. 31, 2012 Subprime [Member]		Jun. 30, 2013 Total RMBS [Member]		Dec. 31, 2012 Total RMBS [Member]
Investment Holdings [Line Items]
Principal or Notional Balance					$ 2,531,514		$ 3,083,892		$ 170,265,662		$ 61,034,333		$ 211,822,035	[1]	$ 38,549,827		$ 80,000,000	$ 36,308,960		$ 1,249,426		$ 106,386,157		$ 64,978,647		$ 46,587,884		$ 4,419,732		$ 573,902,212		$ 173,315,857
Premium (Discount)					269,463		351,047		7,140,749		3,056,889		(100,256,547)	[1]	(8,606,689)			(7,839,404)		(378,803)		(12,568,896)		(8,074,525)		(13,204,279)		(825,131)		(126,458,914)		(14,477,212)
Amortized Cost					2,800,977		3,434,939		177,406,411		64,091,222		111,565,488	[1]	29,943,138			28,469,556		870,623		93,817,261		56,904,122		33,383,605		3,594,601		447,443,298		158,838,645
Gross Unrealized
Gains						[2]		[3]	678,522	[2]	2,442,401	[3]	3,418,507	[1],[2]	3,436,729	[3]		114,962	[2]	95,221	[3]	5,053,935	[2]	5,668,301	[3]	538,207	[2]	401,214	[3]	9,804,133	[2]	12,043,866	[3]
Losses					(209,094)	[2]	(194,609)	[3]	(6,174,710)	[2]	(13,921)	[3]	(2,917,214)	[1],[2]		[3]		(904,455)	[2]		[3]	(1,107,625)	[2]	(2,298)	[3]	(1,397,637)	[2]		[3]	(12,710,735)	[2]	(210,828)	[3]
Fair Value					2,591,883		3,240,330		171,910,223		66,519,702		112,066,781	[1]	33,379,867			27,680,063		965,844		97,763,571		62,570,125		32,524,175		3,995,815		444,536,696		170,671,683
Weighted Average Coupon					2.80%		2.84%		3.43%		3.82%		4.95%	[1]	5.69%			0.84%		1.19%		5.41%		5.79%		0.65%		0.98%		3.88%		4.81%
Weighted Average Yield					2.28%	[4]	2.28%	[4]	3.14%	[4]	3.44%	[4]	6.41%	[1],[4]	7.95%	[4]		6.15%	[4]	8.67%	[4]	6.51%	[4]	7.34%	[4]	6.98%	[4]	9.10%	[4]	5.17%	[4]	5.89%	[4]
Change in unrealized (loss) / gain on real estate securities	$ (15,642,642)	$ 2,903,133	$ (14,739,365)	$ 9,392,927

[1] Alternative-A RMBS includes an IO with a notional balance of $80.0 million.

[2] The Company has elected the fair value option pursuant to ASC 825 for its real estate securities. The Company recorded net change in unrealized loss / gain on its real estate securities of a loss of $15.6 million and a gain of $2.9 million for the three months ended June 30, 2013 and 2012, respectively, and a loss of $14.7 million and a gain of $9.4 million for the six months ended June 30, 2013 and 2012, respectively, as change in unrealized loss/gain on real estate securities in the consolidated statements of operations.

[3] The Company has elected the fair value option pursuant to ASC 825 for its real estate securities.

[4] Unleveraged yield.