CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Cash pledged as collateral		$ 1,428,475	$ 1,584,686
Credit risk transfer securities, pledged assets		608,707	184,160
Residential mortgage loans, pledged assets		314,746	0
Mortgage servicing rights, pledged assets		5,464	0
Commercial real estate debt investments, pledged assets		4,321,739	2,911,828
Commercial real estate debt and preferred equity, held for investment, pledged assets		506,997	578,820
Corporate debt, pledged assets		$ 592,871	$ 0
Common Stock, par value		$ 0.01	$ 0.01
Common Stock, shares authorized		1,945,437,500	1,945,437,500
Common Stock, shares issued		1,018,913,249	935,929,561
Common Stock, shares outstanding		1,018,913,249	935,929,561
Senior Secured mortgages of Consolidated VIE, carrying value		$ 0	$ 262,700
Mortgage-backed securities, including pledged assets		77,715,902	67,233,494
Residential mortgage loans	[1]	342,289
Senior Secured mortgages of Consolidated VIE, fair value		3,900	2,600
Cash of Consolidated VIE	[2]	1,539,746	1,769,258
Securitized debt of a consolidated VIE		3,655,802	2,366,878
Agency Mortgage-backed Securities
Mortgage-backed securities, pledged assets		70,796,872	60,678,548
Mortgage-backed securities, including pledged assets		75,589,873	65,718,224
Non-Agency Mortgage-backed Securities
Mortgage-backed securities, pledged assets		1,064,603	744,783
Mortgage-backed securities, including pledged assets	[3]	$ 1,401,307	$ 906,722
7.875% Series A Cumulative Redeemable Preferred Stock
Cumulative redeemable preferred stock, shares authorized		7,412,500	7,412,500
Cumulative redeemable preferred stock, shares issued		7,412,500	7,412,500
Cumulative redeemable preferred stock, shares outstanding		7,412,500	7,412,500
7.625% Series C Cumulative Redeemable Preferred Stock
Cumulative redeemable preferred stock, shares authorized		12,650,000	12,650,000
Cumulative redeemable preferred stock, shares issued		12,000,000	12,000,000
Cumulative redeemable preferred stock, shares outstanding		12,000,000	12,000,000
7.50% Series D Cumulative Redeemable Preferred Stock
Cumulative redeemable preferred stock, shares authorized		18,400,000	18,400,000
Cumulative redeemable preferred stock, shares issued		18,400,000	18,400,000
Cumulative redeemable preferred stock, shares outstanding		18,400,000	18,400,000
7.625% Series E Cumulative Redeemable Preferred Stock
Cumulative redeemable preferred stock, shares authorized		11,500,000	11,500,000
Cumulative redeemable preferred stock, shares issued		11,500,000	11,500,000
Cumulative redeemable preferred stock, shares outstanding		11,500,000	11,500,000
FREMF Trust
Residential mortgage loans		$ 165,900	$ 0
Cash of Consolidated VIE		23,200	48,500
FREMF Trust | Non-Agency Mortgage-backed Securities
Mortgage-backed securities, including pledged assets		$ 88,600	$ 0

[1] Includes securitized residential mortgage loans of a consolidated VIE carried at fair value of $165.9 million and $0 at December 31, 2016 and 2015, respectively.

[2] Includes cash of consolidated VIEs of $23.2 million and $48.5 million at December 31, 2016 and 2015, respectively.

[3] Includes $88.6 million and $0 at December 31, 2016 and 2015, respectively, of non-Agency mortgage-backed securities in a consolidated VIE pledged as collateral and eliminated from the Company's Consolidated Statements of Financial Condition.