Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Assets
Cash	$ 433,149		$ 496,478
Cash collateral posted	14,134		35,917
Agency Securities, available for sale, at fair value (including pledged securities of $16,284,466 and $13,832,482)	16,962,134		14,648,178
Derivatives, at fair value	169,877	[1]	508,988	[1]
Principal payments receivable	108		70
Accrued interest receivable	44,901		42,034
Prepaid and other assets	447		852
Total Assets	17,624,750		15,732,517
Liabilities:
Repurchase agreements, net	14,393,580		13,151,504
Obligations to return securities received as collateral, at fair value	1,021,484		0
Cash collateral held	128,168		387,845
Payable for unsettled purchases	38,816		159,159
Derivatives, at fair value	70,472	[1]	102,795	[1]
Accrued interest payable- repurchase agreements	7,888		6,629
Accrued interest payable- U.S. Treasury Securities sold short	10,256		0
Accounts payable and other accrued expenses	3,203		23,357
Total Liabilities	15,673,867		13,831,289
Commitments and contingencies
Preferred stock, $0.001 par value, 50,000 shares authorized;
Common stock, $0.001 par value, 1,000,000 shares authorized, 357,189 and 357,613 shares issued and outstanding at June 30, 2014 and December 31, 2013	357		358
Additional paid-in capital	2,732,647		2,734,480
Accumulated deficit	(848,544)		(643,138)
Accumulated other comprehensive income (loss)	66,415		(190,480)
Total Stockholders’ Equity	1,950,883		1,901,228
Total Liabilities and Stockholders’ Equity	17,624,750		15,732,517
Series A Preferred Stock
Preferred stock, $0.001 par value, 50,000 shares authorized;
Preferred Stock, Value, Issued	2		2
Total Stockholders’ Equity	2		2
Series B Preferred Stock
Preferred stock, $0.001 par value, 50,000 shares authorized;
Preferred Stock, Value, Issued	6		6
Total Stockholders’ Equity	$ 6		$ 6

[1] See Note 5, “Fair Value of Financial Instruments” for additional discussion.