CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified		Total	Preferred Stock, Series A 8.50% Cumulative Redeemable - Liquidation Preference $25.00 per Share:	Common Stock, Par Value $.01:	Additional Paid-in Capital, in excess of Par:	Accumulated Deficit:	Accumulated Other Comprehensive Income/(Loss):
Balance at Dec. 31, 2009			$ 38	$ 2,801	$ 2,180,605	$ (202,189)	$ 187,007
Balance (in shares) at Dec. 31, 2009			3,840,000	280,078,000
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of expenses	[1]			4	605
Issuance of common stock, net of expenses (in shares)	[1]			403,000
Equity-based compensation expense		3,283			3,283
Net income		269,762				269,762
Dividends declared on common stock						(250,079)
Dividends declared on preferred stock		(8,160)				(8,160)
Dividends attributable to DERs						(903)
Change in unrealized gains/(losses) on MBS, net		54,352					54,352
Change in unrealized gains on derivative hedging instruments, net							13,321
Balance at Dec. 31, 2010		2,250,447	38	2,805	2,184,493	(191,569)	254,680
Balance (in shares) at Dec. 31, 2010			3,840,000	280,481,000
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of expenses	[1]			756	607,047
Issuance of common stock, net of expenses (in shares)	[1]			75,631,000
Equity-based compensation expense		4,385			4,385
Net income		316,414				316,414
Dividends declared on common stock						(358,104)
Dividends declared on preferred stock		(8,160)				(8,160)
Dividends attributable to DERs						(1,642)
Change in unrealized gains/(losses) on MBS, net		(338,331)					(338,331)
Change in unrealized gains on derivative hedging instruments, net							24,948
Balance at Dec. 31, 2011		2,497,760	38	3,561	2,795,925	(243,061)	(58,703)
Balance (in shares) at Dec. 31, 2011			3,840,000	356,112,000
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of expenses	[1]			30	15,432
Issuance of common stock, net of expenses (in shares)	[1]			2,966,000
Shares issued for common stock option exercises					35
Equity-based compensation expense		6,488			6,488
Repurchase of shares of common stock	[1]			(16)	(12,156)
Repurchase of shares of common stock (in shares)	[1]			(1,532,000)
Net income		306,839				306,839
Dividends declared on common stock						(314,553)
Dividends declared on preferred stock		(8,160)				(8,160)
Dividends attributable to DERs						(1,373)
Change in unrealized gains/(losses) on MBS, net		769,317					769,317
Change in unrealized gains on derivative hedging instruments, net							51,363
Balance at Dec. 31, 2012		$ 3,311,006	$ 38	$ 3,575	$ 2,805,724	$ (260,308)	$ 761,977
Balance (in shares) at Dec. 31, 2012			3,840,000	357,546,000

[1] For the year ended December 31, 2012, includes approximately $9.7 million (1,240,291 shares) repurchased through the Company's publicly announced stock repurchase program and approximately $2.5 million (291,803 shares) surrendered for tax purposes related to equity-based compensation awards.