CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Interest income:
Investments	$ 948,703		$ 642,782		$ 1,786,583		$ 1,296,717
U.S. Treasury Securities	6,497		40		11,322		40
Securities loaned	1,868		860		3,211		1,314
Total interest income	957,068		643,682		1,801,116		1,298,071
Interest expense:
Repurchase agreements	100,164		96,975		202,766		189,064
Convertible Senior Notes	6,900		6,966		13,667		10,161
U.S. Treasury Securities sold, not yet purchased	4,772		24		9,758		24
Securities borrowed	1,484		742		2,585		1,129
Total interest expense	113,320		104,707		228,776		200,378
Net interest income	843,748		538,975		1,572,340		1,097,693
Other income (loss):
Investment advisory and other fee income	20,710		13,863		37,917		26,409
Net gains (losses) on sales of Mortgage-Backed Securities and agency debentures	7,336		39,041		34,521		86,003
Dividend income	8,230		7,330		14,527		15,294
Net gains (losses) on trading assets	(5,712)		77		13,100		77
Net gain (losses) on interest-only Mortgage-Backed Securities	276				276
Income (expense) from underwriting	(77)		500		2,827		500
Subtotal, other (loss) income excluding derivatives	30,763		60,811		103,168		128,283
Realized gains (losses) on interest rate swaps	(216,760)	[1]	(175,535)	[1]	(422,908)	[1]	(356,373)	[1]
Unrealized gains (losses) on interest rate swaps	(466,943)		(593,038)		(297,635)		(709,770)
Subtotal, realized and unrealized gains (losses) on interest rate swaps	(683,703)		(768,573)		(720,543)		(1,066,143)
Total other (loss) income	(652,940)		(707,762)		(617,375)		(937,860)
Expenses:
Distribution fees							360
General and administrative expenses	57,229		41,540		109,056		81,561
Total expenses	57,229		41,540		109,056		81,921
Income (loss) before income taxes and income from equity method investment in affiliate	133,579		(210,327)		845,909		77,912
Income taxes	(12,762)		(8,837)		(26,337)		(16,151)
Income (loss) from equity method investment in affiliate			935		1,140		1,075
Net income (loss)	120,817		(218,229)		820,712		62,836
Dividends on preferred stock	4,267		4,625		8,534		9,250
Net income (loss) available (related) to common shareholders	116,550		(222,854)		812,178		53,586
Net income (loss) available (related) per share to common shareholders:
Basic (dollars per share)	$ 0.14		$ (0.40)		$ 1.03		$ 0.10
Diluted (dollars per share)	$ 0.14		$ (0.40)		$ 1.00		$ 0.10
Weighted average number of common shares outstanding:
Basic (in shares)	822,623,370		559,700,836		787,712,527		557,360,358
Diluted (in shares)	827,754,731		559,700,836		827,622,301		557,418,175
Net income (loss)	120,817		(218,229)		820,712		62,836
Other comprehensive income (loss):
Unrealized gains (losses) on available-for-sale securities	1,047,639		664,544		905,412		671,960
Unrealized losses on interest rate swaps			26,846		14,298		62,927
Reclassification adjustment for net (gains) losses included in net income (loss)	(7,336)		(39,041)		(34,521)		(86,003)
Other comprehensive income (loss)	1,040,303		652,349		885,189		648,884
Comprehensive income (loss)	$ 1,161,120		$ 434,120		$ 1,705,901		$ 711,720

[1] Interest expense related to the Company's interest rate swaps is recorded in Realized losses on interest rate swaps on the Consolidated Statements of Operations and Comprehensive Income.