CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents (including cash pledged as collateral of $2,223,009 and $1,584,686, respectively)	[1]	$ 2,416,136	$ 1,769,258	[2]
Investments, at fair value:
Mortgage-backed securities, including pledged assets		67,255,533	67,233,494
Agency debentures (including pledged assets of $0 and $0, respectively)		157,035	152,038	[2]
Credit risk transfer securities (including pledged assets of $150,479 and $184,160, respectively)		501,167	456,510	[2]
Commercial real estate debt investments (including pledged assets of $4,401,725 and $2,911,828, respectively)	[3]	4,401,725	2,911,828	[2]
Commercial real estate debt and preferred equity, held for investment (including pledged assets of $523,787 and $578,820, respectively)	[4]	1,177,468	1,348,817	[2]
Loans held for sale		278,600	278,600	[2]
Investments in commercial real estate		527,786	535,946	[2]
Corporate debt		639,481	488,508	[2]
Interest rate swaps, at fair value		93,312	19,642	[2]
Other derivatives, at fair value		77,449	22,066	[2]
Receivable for investments sold		2,220	121,625	[2]
Accrued interest and dividends receivable		232,180	231,336	[2]
Other assets		234,407	119,422	[2]
Goodwill		71,815	71,815	[2]
Intangible assets, net		35,853	38,536	[2]
Total assets		77,443,965	75,190,893	[2]
Liabilities:
Repurchase agreements		54,448,141	56,230,860	[2]
Other secured financing		3,588,326	1,845,048	[2]
Securitized debt of consolidated VIEs	[5]	3,802,682	2,540,711	[2]
Participation sold		13,182	13,286	[2]
Mortgages payable		334,765	334,707	[2]
Interest rate swaps, at fair value		2,782,961	1,677,571	[2]
Other derivatives, at fair value		69,171	49,963	[2]
Dividends payable		277,456	280,779	[2]
Payable for investments purchased		250,612	107,115	[2]
Accrued interest payable		163,983	151,843	[2]
Accounts payable and other liabilities		54,679	53,088	[2]
Total liabilities		65,785,958	63,284,971	[2]
Stockholders' Equity:
Common stock, par value $0.01 per share, 1,956,937,500 authorized, 924,853,133 and 935,929,561 issued and outstanding, respectively		9,249	9,359	[2]
Additional paid-in capital		14,573,760	14,675,768	[2]
Accumulated other comprehensive income (loss)		640,366	(377,596)	[2]
Accumulated deficit		(4,487,982)	(3,324,616)	[2]
Total stockholders' equity		11,648,452	11,895,974	[2]
Noncontrolling interest		9,555	9,948	[2]
Total equity		11,658,007	11,905,922	[2]
Total liabilities and equity		77,443,965	75,190,893	[2]
Agency Mortgage Backed Securities
Investments, at fair value:
Mortgage-backed securities, including pledged assets		65,439,824	65,718,224	[2]
Liabilities:
Repurchase agreements		53,523,183	55,472,998
Non-Agency mortgage-backed securities [Member]
Investments, at fair value:
Mortgage-backed securities, including pledged assets		1,157,507	906,722	[2]
7.875% Series A Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock		177,088	177,088	[2]
Total equity		177,088	177,088
7.625% Series C Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock		290,514	290,514	[2]
Total equity		290,514	290,514
7.50% Series D Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock		445,457	445,457	[2]
Total equity		$ 445,457	$ 445,457

[1] Includes cash of consolidated VIEs of $50.7 million and $48.5 million at March 31, 2016 and December 31, 2015, respectively.

[2] Derived from the audited consolidated financial statements at December 31, 2015.

[3] Includes senior securitized commercial mortgage loans of consolidated VIEs carried at fair value of $4.0 billion and $2.6 billion at March 31, 2016 and December 31, 2015, respectively.

[4] Includes senior securitized commercial mortgage loans of a consolidated VIE with a carrying value of $211.9 million and $262.7 million carried at amortized cost, net of an allowance for losses of $0, at March 31, 2016 and December 31, 2015, respectively.

[5] Includes securitized debt of consolidated VIEs carried at fair value of $3.7 billion and $2.4 billion at March 31, 2016 and December 31, 2015, respectively.