CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ (203,351)		$ 870,278
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Amortization of Investment Securities premiums and discounts, net	118,988		421,057
Amortization of commercial real estate investment premiums and discounts, net	792
Amortization of intangibles	99		323
Amortization of deferred financing costs	2,813		2,038
Amortization of net origination fees and costs, net	(973)
Amortization of contingent beneficial conversion feature and equity component of Convertible Senior Notes	6,410		3,324
Depreciation expense	292
Net gain on sale of commercial real estate	(1,213)
Net (gains) losses on sales of Agency mortgage-backed securities and debentures	(80,718)		(182,843)
Stock compensation expense			817
Unrealized (gains) losses on interest rate swaps	348,942		(325,734)
Net unrealized (gains) losses on interest-only Agency mortgage-backed securities	20,793		(80,127)
Net (gains) losses on trading assets	146,228		14,829
Proceeds from repurchase agreements of RCap	329,649,937		237,569,485
Payments on repurchase agreements of RCap	(324,602,992)		(238,600,415)
Proceeds from reverse repurchase agreements	35,181,890		105,335,861
Payments on reverse repurchase agreements	(35,526,265)		(108,458,231)
Proceeds from securities borrowed	19,993,580		53,799,157
Payments on securities borrowed	(17,924,187)		(54,326,700)
Proceeds from securities loaned	37,178,735		110,725,140
Payments on securities loaned	(39,192,893)		(110,203,395)
Proceeds from U.S. Treasury securities	3,159,253		21,683,636
Payments on U.S. Treasury securities	(3,920,425)		(22,157,117)
Net payments on derivatives	(90,440)		(1,490)
Net change in:
Due to / from brokers	8,596
Other assets	3,439		(14,779)
Accrued interest and dividends receivable	(16,035)		22,616
Receivable for investment advisory income	341		4,913
Accrued interest payable	25,032		(11,147)
Accounts payable and other liabilities	13,801		26,250
Net cash provided by (used in) operating activities	4,300,469		(3,882,254)
Cash flows from investing activities:
Payments on purchases of Agency mortgage-backed securities and debentures	(9,367,034)		(17,699,472)
Proceeds from sales of Agency mortgage-backed securities and debentures	6,155,091		15,484,409
Principal payments on Agency mortgage-backed securities	1,675,575		8,514,074
Proceeds from Agency debentures called			847,205
Payments on purchases of corporate debt	(28,705)		(3,483)
Principal payments on corporate debt	1,051		911
Origination of commercial real estate investments, net	(125,949)
Proceeds from sales of commercial real estate held for sale	20,740
Principal payments on commercial real estate investments	69,795
Proceeds from derivatives			7,465
Net cash provided by (used in) investing activities	(1,599,436)		7,151,109
Cash flows from financing activities:
Proceeds from repurchase agreements	49,726,537		101,631,583
Principal payments on repurchase agreements	(52,010,534)		(103,063,408)
Proceeds from issuance of securitized debt	260,700
Payment of deferred financing cost	(4,288)
Proceeds from exercise of stock options			265
Net proceeds from direct purchases and dividend reinvestments	607		761
Payments on participation sold	(72)
Net payment on share repurchase			(141,149)
Dividends paid	(302,222)		(450,146)
Net cash provided by (used in) financing activities	(2,329,272)		(2,022,094)
Net (decrease) increase in cash and cash equivalents	371,761		1,246,761
Cash and cash equivalents, beginning of period	552,436	[1]	615,789
Cash and cash equivalents, end of period	924,197		1,862,550
Supplemental disclosure of cash flow information:
Interest received	769,627		1,188,202
Dividends received	13,045		7,097
Investment advisory income received	6,464		18,321
Interest paid (excluding interest paid on interest rate swaps)	118,131		184,426
Net interest paid on interest rate swaps	250,571		226,463
Taxes paid	2,137		2,382
Noncash investing activities:
Receivable for investments sold	19,116		1,292,478
Payable for investments purchased	1,898,507		3,203,461
Net change in unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment	660,454		(1,049,994)
Noncash financing activities:
Dividends declared, not yet paid	284,247		426,173
Contingent beneficial conversion feature on 4% Convertible Senior Notes	$ 4,186		$ 3,963

[1] Derived from the audited consolidated financial statements at December 31, 2013.