CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 78,060	$ 78,070
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sales of MBS and U.S. Treasury securities	(9,708)	(9,745)
Gain on sales of real estate owned	(875)	(509)
Other-than-temporary impairment charges	414	0
Accretion of purchase discounts on MBS and CRT securities and residential whole loans	(23,682)	(22,083)
Amortization of purchase premiums on MBS and CRT securities	8,029	8,143
Depreciation and amortization on real estate, fixed assets and other assets	210	272
Equity-based compensation expense	1,106	1,134
Unrealized gain on residential whole loans at fair value	(2,948)	(6,226)
Decrease/(increase) in other assets	5,241	(6,259)
Decrease in other liabilities	(12,392)	(3,798)
Net cash provided by operating activities	43,455	38,999
Cash Flows From Investing Activities:
Principal payments on MBS and CRT securities and other investments	762,747	807,349
Proceeds from sales of MBS and U.S. Treasury securities	160,697	32,034
Purchases of MBS and CRT securities and other investments	(244,582)	(375,404)
Purchases of residential whole loans and capitalized advances	(5,027)	(165,510)
Principal payments on residential whole loans	35,453	21,666
Proceeds from sales of real estate owned	10,438	6,157
Redemption of Federal Home Loan Bank stock	10,422	10,475
Additions to leasehold improvements, furniture and fixtures	(133)	(56)
Net cash provided by investing activities	730,015	336,711
Cash Flows From Financing Activities:
Principal payments on repurchase agreements and other advances	(20,513,712)	(19,776,510)
Proceeds from borrowings under repurchase agreements and other advances	19,963,451	19,532,131
Principal payments on securitized debt	0	(10,133)
Payments made for margin calls on repurchase agreements and interest rate swap agreements (“Swaps”)	(24,846)	(117,800)
Proceeds from reverse margin calls on repurchase agreements and Swaps	37,517	55,700
Proceeds from issuances of common stock	3,952	306
Dividends paid on preferred stock	(3,750)	(3,750)
Dividends paid on common stock and dividend equivalents	(74,622)	(74,425)
Net cash used in financing activities	(612,010)	(394,481)
Net increase/(decrease) in cash and cash equivalents	161,460	(18,771)
Cash and cash equivalents at beginning of period	260,112	165,007
Cash and cash equivalents at end of period	421,572	146,236
Non-cash Investing and Financing Activities:
Net increase/(decrease) in securities obtained as collateral/obligation to return securities obtained as collateral	4,155	(5,175)
Transfer from residential whole loans to real estate owned	31,098	22,280
Dividends and dividend equivalents declared and unpaid	$ 74,830	$ 74,583