CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 924,197		$ 552,436	[1]
Reverse repurchase agreements	444,375		100,000	[1]
Securities borrowed	513,500		2,582,893	[1]
Investments, at fair value:
U.S. Treasury securities (including pledged assets of $0 and $1,113,027, respectively)			1,117,915	[1]
Agency mortgage-backed securities (including pledged assets of $66,110,869 and $63,897,873, respectively)	75,350,388		70,388,949	[1]
Agency debentures (including pledged assets of $2,368,493 and $2,931,261, respectively)	2,408,259		2,969,885	[1]
Investment in affiliates	137,647		139,447	[1]
Commercial real estate debt and preferred equity	1,640,206	[2]	1,583,969	[1],[2]
Investments in commercial real estate	40,313		60,132	[1]
Corporate debt, held for investment	145,394		117,687	[1]
Receivable for investments sold	19,116		1,193,730	[1]
Accrued interest and dividends receivable	276,007		273,079	[1]
Receivable for investment advisory income (including from affiliates of $6,498 and $6,839, respectively)	6,498		6,839	[1]
Goodwill	94,781		94,781	[1]
Interest rate swaps, at fair value	340,890		559,044	[1]
Other derivatives, at fair value	40,105		146,725	[1]
Other assets	33,101		34,949	[1]
Total assets	82,414,777		81,922,460	[1]
Liabilities:
U.S. Treasury securities sold, not yet purchased, at fair value			1,918,394	[1]
Repurchase agreements	64,543,949		61,781,001	[1]
Securities loaned	513,510		2,527,668	[1]
Payable for investments purchased	1,898,507		764,131	[1]
Convertible Senior Notes	827,486		825,262	[1]
Securitized debt of consolidated VIE	260,700
Mortgages payable	19,317		19,332	[1]
Participation sold	13,963		14,065	[1]
Accrued interest payable	170,644		160,921	[1]
Dividends payable	284,247		284,230	[1]
Interest rate swaps, at fair value	1,272,616		1,141,828	[1]
Other derivatives, at fair value	6,045		55,518	[1]
Accounts payable and other liabilities	39,081		25,055	[1]
Total liabilities	69,850,065		69,517,405	[1]
Stockholders' Equity:
Common stock, par value $0.01 per share, 1,956,937,500 authorized, 947,488,945 and 947,432,862 issued and outstanding, respectively	9,475		9,474	[1]
Additional paid-in capital	14,770,553		14,765,761	[1]
Accumulated other comprehensive income (loss)	(2,088,479)		(2,748,933)	[1]
Accumulated deficit	(1,039,896)		(534,306)	[1]
Total stockholders' equity	12,564,712		12,405,055	[1]
Total liabilities and stockholders' equity	82,414,777		81,922,460	[1]
7.875% Series A Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	177,088		177,088	[1]
7.625% Series C Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	290,514		290,514	[1]
7.50% Series D Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	$ 445,457		$ 445,457	[1]

[1] Derived from the audited consolidated financial statements at December 31, 2013.

[2] Includes senior securitized mortgages of consolidated VIE with a carrying value of $398.1 million.