CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Interest income:
Investments	$ 728,609		$ 850,959
U.S. Treasury Securities	5,996		1,418
Securities loaned	2,612		2,518
Total interest income	737,217		854,895
Interest expense:
Repurchase agreements	157,064		113,914
Convertible Senior Notes	15,813		14,727
U.S. Treasury Securities sold, not yet purchased	2,788		2,644
Securities borrowed	1,925		2,060
Total interest expense	177,590		133,345
Net interest income	559,627		721,550
Other income (loss):
Investment advisory and other fee income	13,540		20,766
Net gains (losses) on disposal of investments	182,843		80,299
Dividend income from affiliates	6,431		7,521
Net gains (losses) on trading assets	1,549		5,256
Net unrealized gains (losses) on interest-only Agency mortgage-backed securities	80,127		30,877
Subtotal	284,490		144,719
Realized gains (losses) on interest rate swaps	(225,476)	[1],[2]	(219,340)	[1],[2]
Realized gains (losses) on termination of interest rate swaps	(16,378)		(2,385)
Unrealized gains (losses) on interest rate swaps	325,734		341,639
Subtotal	83,880		119,914
Total other income (loss)	368,370		264,633
Expenses:
Compensation expense	38,443		59,014
Other general and administrative expenses	13,469		8,901
Total expenses	51,912		67,915
Income (loss) before income taxes	876,085		918,268
Income taxes	(5,807)		(16,462)
Net income (loss)	870,278		901,806
Dividends on preferred stock	17,992		3,938
Net income (loss) available (related) to common shareholders	852,286		897,868
Net income (loss) per share available (related) to common shareholders:
Basic	$ 0.90		$ 0.92
Diluted	$ 0.87		$ 0.89
Weighted average number of common shares outstanding:
Basic	947,249,901		971,727,701
Diluted	994,815,169		1,010,588,609
Dividends Declared Per Share of Common Stock	$ 0.45		$ 0.55
Net income (loss)	870,278		901,806
Other comprehensive income (loss):
Unrealized gains (losses) on available-for-sale securities	(867,151)		(162,259)
Reclassification adjustment for net (gains) losses included in net income (loss)	(182,843)		(80,299)
Other comprehensive income (loss)	(1,049,994)		(242,558)
Comprehensive income (loss)	$ (179,716)		$ 659,248

[1] Interest expense related to the Company's interest rate swaps is recorded in Realized gains (losses) on interest rate swaps on the Consolidated Statements of Operations and Comprehensive Income (Loss). See notes to consolidated financial statements.

[2] Net interest payments on interest rate swaps is presented in the Company's Consolidated Statements of Operations and Comprehensive Income (Loss) as realized gains (losses) on interest rate swaps.