CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents (including cash pledged as collateral of $2,271,856 and $1,584,686, respectively)	[1]	$ 2,382,188	$ 1,769,258	[2]
Investments, at fair value:
Mortgage-backed securities, including pledged assets		75,605,661	67,233,494
Agency debentures	[2]		152,038
Credit risk transfer securities (including pledged assets of $446,529 and $184,160, respectively)		669,295	456,510	[2]
Residential mortgage loans (including pledged assets of $179,626 and $0, respectively)	[3]	310,148
Mortgage servicing rights		492,169
Commercial real estate debt investments (including pledged assets of $4,319,077 and $2,911,828, respectively)	[4]	4,319,077	2,911,828	[2]
Commercial real estate debt and preferred equity, held for investment (including pledged assets of $583,131 and $578,820, respectively)	[5]	1,070,197	1,348,817	[2]
Commercial loans held for sale, net		144,275	278,600	[2]
Investments in commercial real estate		500,027	535,946	[2]
Corporate debt (including pledged assets of $475,453 and $0, respectively)		716,831	488,508	[2]
Interest rate swaps, at fair value		113,253	19,642	[2]
Other derivatives, at fair value		87,921	22,066	[2]
Receivable for investments sold		493,839	121,625	[2]
Accrued interest and dividends receivable		260,583	231,336	[2]
Other assets		301,419	119,422	[2]
Goodwill		71,815	71,815	[2]
Intangible assets, net		39,903	38,536	[2]
Total assets		86,909,306	75,190,893	[2]
Liabilities:
Repurchase agreements		61,784,121	56,230,860	[2]
Other secured financing		3,804,742	1,845,048	[2]
Securitized debt of consolidated VIEs	[6]	3,712,821	2,540,711	[2]
Participation sold		12,976	13,286	[2]
Mortgages payable		327,632	334,707	[2]
Interest rate swaps, at fair value		2,919,492	1,677,571	[2]
Other derivatives, at fair value		73,445	49,963	[2]
Dividends payable		269,111	280,779	[2]
Payable for investments purchased		454,237	107,115	[2]
Accrued interest payable		173,320	151,843	[2]
Accounts payable and other liabilities		115,606	53,088	[2]
Total liabilities		73,647,503	63,284,971	[2]
Stockholders' Equity:
Common stock, par value $0.01 per share, 1,945,437,500 and 1,956,937,500 authorized, 1,018,857,866 and 935,929,561 issued and outstanding, respectively		10,189	9,359	[2]
Additional paid-in capital		15,578,677	14,675,768	[2]
Accumulated other comprehensive income (loss)		1,119,677	(377,596)	[2]
Accumulated deficit		(4,655,440)	(3,324,616)	[2]
Total stockholders' equity		13,253,662	11,895,974	[2]
Noncontrolling interest		8,141	9,948	[2]
Total equity		13,261,803	11,905,922	[2]
Total liabilities and equity		86,909,306	75,190,893	[2]
Agency Mortgage Backed Securities
Investments, at fair value:
Mortgage-backed securities, including pledged assets		73,476,105	65,718,224	[2]
Liabilities:
Repurchase agreements		60,363,138	55,472,998
Non-Agency mortgage-backed securities
Investments, at fair value:
Mortgage-backed securities, including pledged assets	[7]	1,460,261	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
7.625% Series E Cumulative Redeemable Preferred Stock
Stockholders' Equity:
Cumulative Redeemable Preferred Stock		287,500
Total equity		$ 287,500

[1] Includes cash of consolidated VIEs of $31.3 million and $48.5 million at September 30, 2016 and December 31, 2015, respectively.

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

[3] Includes securitized mortgage loans of a consolidated VIE carried at fair value of $176.7 million and $0 at September 30, 2016 and December 31, 2015, respectively.

[4] Includes senior securitized commercial mortgage loans of consolidated VIEs carried at fair value of $4.0 billion and $2.6 billion at September 30, 2016 and December 31, 2015, respectively.

[5] Includes senior securitized commercial mortgage loans of a consolidated VIE with a carrying value of $128.9 million and $262.7 million carried at amortized cost, net of an allowance for losses of $0, at September 30, 2016 and December 31, 2015, respectively.

[6] Includes securitized debt of consolidated VIEs carried at fair value of $3.7 billion and $2.4 billion at September 30, 2016 and December 31, 2015, respectively.

[7] Includes $96.0 million and $0 at September 30, 2016 and December 31, 2015, respectively, of non-Agency mortgage-backed securities pledged as collateral in a consolidated VIE and eliminated from the Company's Consolidated Statements of Financial Condition.