Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows From Operating Activities:
Net income	$ 157,226	$ 183,228
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Accretion) amortization of investment discounts/premiums, net	4,349	(10,026)
Accretion (amortization) of deferred financing costs and securitized debt discounts/premiums, net	5,019	2,689
Amortization of swaption premium	3,280	0
Net unrealized losses (gains) on derivatives	79,010	(92,083)
Proceeds (payments) for derivative sales and settlements	0	(11,831)
Margin (paid) received on derivatives	(72,901)	107,462
Net unrealized losses (gains) on financial instruments at fair value	(47,218)	47,685
Net realized losses (gains) on sales of investments	(3,956)	(39,250)
Net other-than-temporary credit impairment losses	31,633	34,916
(Gain) loss on extinguishment of debt	1,766	(5,079)
Equity-based compensation expense	754	496
Changes in operating assets:
Decrease (increase) in accrued interest receivable, net	(43,397)	(485)
Decrease (increase) in other assets	(35,360)	(19,691)
Changes in operating liabilities:
Increase (decrease) in accounts payable and other liabilities	11,195	(1,596)
Increase (decrease) in investment management fees and expenses payable to affiliate	0	(75)
Increase (decrease) in accrued interest payable, net	22,837	(4,030)
Net cash provided by (used in) operating activities	114,237	192,330
Cash Flows From Investing Activities:
Net cash provided by (used in) investing activities	(1,986,238)	1,747,780
Cash Flows From Financing Activities:
Proceeds from repurchase agreements	19,984,492	24,571,022
Payments on repurchase agreements	(21,567,569)	(26,212,572)
Proceeds from securitized debt borrowings, collateralized by loans held for investment	4,180,227	485,112
Payments on securitized debt borrowings, collateralized by loans held for investment	(395,027)	(626,016)
Payments on securitized debt borrowings, collateralized by Non-Agency RMBS	(102,701)	(81,583)
Common dividends paid	(274,062)	(191,145)
Net cash provided by (used in) financing activities	1,825,360	(2,055,182)
Net increase (decrease) in cash and cash equivalents	(46,641)	(115,072)
Cash and cash equivalents at beginning of period	114,062	164,620
Cash and cash equivalents at end of period	67,421	49,548
Supplemental disclosure of cash flow information:
Interest received	383,245	448,438
Interest paid	118,450	133,219
Management fees and expenses paid	0	20,597
Non-cash investing activities:
Payable for investments purchased	642,169	457,484
Net change in unrealized gain (loss) on available-for sale securities	133,382	(141,873)
Non-cash financing activities:
Common dividends declared, not yet paid	90,504	98,677
Agency MBS - Residential
Cash Flows From Investing Activities:
Purchases	(669,335)	(3,197,685)
Sales	2,555,162	4,653,668
Principal payments	308,791	681,784
Non-agency MBS
Cash Flows From Investing Activities:
Purchases	(114,227)	(745,330)
Sales	67,256	109,999
Principal payments	279,560	169,027
Securitized Loans
Cash Flows From Investing Activities:
Purchases	(4,745,083)	(281,811)
Principal payments	$ 331,638	$ 358,128