Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Mortgage-backed securities, at fair value (including pledged assets of $16,929,846 and $22,591,973 at December 31, 2013 and December 31, 2012, respectively)	$ 17,642,532	$ 23,919,251
Cash and cash equivalents	763,326	168,424
Restricted cash	225,379	281,021
Unsettled purchased mortgage-backed securities, at fair value		138,338
Receivable for securities sold	231,214	1,587,535
Accrued interest receivable	55,156	77,113
Principal payments receivable	95,021	190,832
Debt security, held to maturity, at cost	15,000	15,000
Interest rate swap asset	15,841
Other assets	33,891	26,604
Total assets	19,077,360	26,404,118
Liabilities and shareholders’ equity
Repurchase agreements	16,129,683	22,866,429
Dollar roll liability	351,826
Payable for unsettled securities		137,121
Accrued interest payable	8,279	7,592
Interest rate swap liability	125,133	243,945
Futures contract liability	36,733
Dividend payable	52,929	73,804
Accounts payable and other liabilities	8,676	2,363
Total liabilities	16,713,259	23,331,254
Shareholders’ equity:
7.625% Series A Cumulative Redeemable Preferred stock, $.001 par value, 25,000,000 shares authorized, 11,500,000 shares issued and outstanding at December 31, 2013 and December 31, 2012, respectively ($287,500 aggregate liquidation preference)	278,252	278,252
Common stock, $.001 par value, 200,000,000 shares authorized, 96,601,523 and 98,822,654 shares issued and outstanding at December 31, 2013 and December 31, 2012, respectively	97	99
Additional paid-in capital	2,453,018	2,494,303
Retained earnings (accumulated deficit)	(359,214)	37,356
Accumulated other comprehensive (loss) income	(8,052)	262,854
Total shareholders’ equity	2,364,101	3,072,864
Total liabilities and shareholders’ equity	$ 19,077,360	$ 26,404,118