CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 730,880		$ (627,491)	$ (415,697)		$ (203,919)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Amortization of Residential Investment Securities premiums and discounts, net				834,257		633,937
Amortization of commercial real estate investment premiums and discounts, net				(2,393)		(1,080)
Amortization of intangibles				10,446		5,095
Amortization of deferred financing costs				1,315		5,192
Amortization of net origination fees and costs, net				(3,925)		(3,350)	$ (4,146)
Amortization of contingent beneficial conversion feature and equity component of Convertible Senior Notes						12,246
Depreciation expense				16,511		8,773
Bargain purchase gain	(72,576)			(72,576)
Net gain on sale of commercial real estate				(821)
Net gain on sale of commercial loans held for sale				72		100
Net (gains) losses on sales of Residential Investment Securities				(24,941)		(70,796)
Net (gains) losses on sale of residential mortgage loans				383
Net (gain) loss on sale of investment in affiliate						12,450
Stock compensation expense				6,949		1,089
Impairment of goodwill						22,966
Unrealized (gains) losses on interest rate swaps	(256,462)		822,585	1,148,478		587,995
Net unrealized (gains) losses on investments measured at fair value through earnings	(29,675)		24,501	24,351		40,466
Equity in net income from unconsolidated joint ventures				5,344		414
Net (gains) losses on trading assets	(162,981)		(108,175)	(370,050)		12,961
Originations of commercial loans held for sale, net						(476,400)
Proceeds from sale of commercial loans held for sale				134,253
Payments on purchase of residential mortgage loans				(73,370)
Proceeds from repayments from residential mortgage loans				107,648
Proceeds from repurchase agreements of RCap				1,661,650,000		1,447,650,000
Payments on repurchase agreements of RCap				(1,662,100,000)		(1,452,000,000)
Proceeds from reverse repurchase agreements of RCap				48,390,000		39,875,000
Payments on reverse repurchase agreements of RCap				(48,390,000)		(39,775,000)
Net payments on derivatives				23,168		7,288
Net change in:
Other assets				(72,800)		(29,324)
Accrued interest and dividends receivable				13,970		52,057
Receivable for investment advisory income						6,410
Accrued interest payable				15,729		(34,947)
Accounts payable and other liabilities				(23,162)		17,417
Net cash provided by (used in) operating activities				833,139		(3,642,960)
Cash flows from investing activities:
Payments on purchases of Residential Investment Securities				(13,628,516)		(13,172,943)
Proceeds from sales of Residential Investment Securities				8,729,912		22,081,011
Principal payments on Agency mortgage-backed securities				8,580,353		7,811,368
Purchase of MSRs				(127,489)
Proceeds from sale of investment in affiliate						126,402
Payments on purchases of corporate debt				(324,863)		(301,739)
Principal payments on corporate debt				98,542		43,846
Purchases of commercial real estate debt investments				(76,862)		(368,511)
Sales of commercial real estate debt investments						41,016
Purchase of securitized loans at fair value				(1,489,268)		(2,574,353)
Origination of commercial real estate investments, net				(204,184)		(350,477)
Proceeds from sale of commercial real estate investments				12,750		227,450
Principal payments on commercial real estate debt investments				71,116		10,170
Principal payments on securitized loans at fair value				106,786
Principal payments on commercial real estate investments				486,435		327,936
Purchase of investments in real estate				(2,043)		(29,900)
Investment in unconsolidated joint venture				(3,109)		(70,602)
Distributions in excess of cumulative earnings from unconsolidated joint ventures				4,155
Payments on purchase of residential mortgage loans held for investment				(8,022)
Proceeds from repayments from residential mortgage loans held for investment				11,771
Purchase of equity securities				(88,062)		(27,519)
Proceeds from sales of equity securities				16,112		13,119
Cash acquired in business combination				41,697
Net cash provided by (used in) investing activities				2,207,211		13,786,274
Cash flows from financing activities:
Proceeds from repurchase agreements				128,601,867		156,196,644
Principal payments on repurchase agreements				(133,021,365)		(166,759,206)
Payments on maturity of convertible senior notes						(857,541)
Proceeds from other secured financing				2,358,314		687,935
Payments on other secured financing				(434,458)		(327,965)
Proceeds from issuance of securitized debt				1,381,640		2,382,810
Principal repayments on securitized debt				(273,091)		(84,560)
Principal repayments on securitized loans						201
Payment of deferred financing cost				(3,076)		(886)
Net proceeds from direct purchases and dividend reinvestments				1,795		1,724
Proceeds from mortgages payable						20,450
Principal payments on participation sold				(230)		(220)
Principal payments on mortgages payable				(7,500)		(262)
Contributions from noncontrolling interests						1,107
Distributions to noncontrolling interests				(926)		(456)
Net payment on share repurchase				(102,712)
Dividends paid				(927,678)		(906,910)
Net cash provided by (used in) financing activities				(2,427,420)		(9,647,135)
Net (decrease) increase in cash and cash equivalents				612,930		496,179
Cash and cash equivalents, beginning of period				1,769,258	[1],[2]	1,741,244	1,741,244
Cash and cash equivalents, end of period	2,382,188	[2]	2,237,423	2,382,188	[2]	2,237,423	1,769,258	[1],[2]
Supplemental disclosure of cash flow information:
Interest received				2,197,880		2,241,301
Dividends received				1,253		12,684
Fees received				4,266
Investment advisory income received						31,258
Interest paid (excluding interest paid on interest rate swaps)				441,121		314,568
Net interest paid on interest rate swaps				415,223		450,750
Taxes paid				858		1,926
Noncash investing activities:
Receivable for investments sold	493,839		127,571	493,839		127,571	121,625	[1]
Payable for investments purchased	454,237		744,378	454,237		744,378	107,115	[1]
Net change in unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment				1,497,273		57,972
Noncash financing activities:
Dividends declared, not yet paid	$ 269,111		$ 284,348	269,111		$ 284,348	$ 280,779	[1]
Decrease in securitized debt				$ 16,663

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

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