CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
ASSETS
Cash and cash equivalents (including cash pledged as collateral of $1,584,701 and $371,790, respectively)	$ 1,741,244		$ 552,436
Reverse repurchase agreements	100,000		100,000
Securities borrowed			2,582,893
Investments, at fair value:
U.S. Treasury securities (including pledged assets of $0 and $1,113,027, respectively)			1,117,915
Agency mortgage-backed securities (including pledged assets of $74,006,480 and $63,897,873, respectively)	81,565,256		70,388,949
Agency debentures (including pledged assets of $1,368,350 and $2,931,261, respectively)	1,368,350		2,969,885
Investment in affiliates	143,045		139,447
Commercial real estate debt and preferred equity	1,518,165	[1]	1,583,969	[1]
Investments in commercial real estate	210,032		60,132
Corporate debt, held for investment	166,464		117,687
Receivable for investments sold	1,010,094		1,193,730
Accrued interest and dividends receivable	278,489		273,079
Receivable for investment advisory income (including from affiliates of $10,402 and $6,839, respectively)	10,402		6,839
Goodwill	94,781		94,781
Interest rate swaps, at fair value	75,225		559,044
Other derivatives, at fair value	5,499		146,725
Other assets	68,321		34,949
Total assets	88,355,367		81,922,460
Liabilities:
U.S. Treasury securities sold, not yet purchased, at fair value			1,918,394
Repurchase agreements	71,361,926		61,781,001
Securities loaned			2,527,668
Payable for investments purchased	264,984		764,131
Convertible Senior Notes	845,295		825,262
Securitized debt of consolidated VIE	260,700
Mortgages payable	146,553		19,332
Participation sold	13,693		14,065
Accrued interest payable	180,501		160,921
Dividends payable	284,293		284,230
Interest rate swaps, at fair value	1,608,286		1,141,828
Other derivatives, at fair value	8,027		55,518
Accounts payable and other liabilities	47,328		25,055
Total liabilities	75,021,586		69,517,405
Stockholders' Equity:
Common stock, par value $0.01 per share, 1,956,937,500 authorized, 947,643,079 and 947,432,862 issued and outstanding, respectively	9,476		9,474
Additional paid-in capital	14,786,509		14,765,761
Accumulated other comprehensive income (loss)	204,883		(2,748,933)
Accumulated deficit	(2,585,436)		(534,306)
Total stockholders' equity	13,328,491		12,405,055
Noncontrolling interest	5,290
Total equity	13,333,781		12,405,055
Total liabilities and equity	88,355,367		81,922,460
7.875% Series A Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	177,088		177,088
7.625% Series C Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	290,514		290,514
7.50% Series D Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock	$ 445,457		$ 445,457

[1] Includes senior securitized mortgages of consolidated VIE with a carrying value of $398.6 million and $0 at December 31,2014 and 2013, respectively.