Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 38,429	$ 59,949	[1]	$ 79,362	[1]
Reconciliation of the net increase in equity resulting from operations to net cash provided by (used in) operating activities:
Net realized (gain) loss on investments, financial derivatives, and foreign currency transactions	(23,454)	(6,008)		(18,002)
Change in net unrealized (gain) loss on investments and financial derivatives, and foreign currency translation	48,649	3,564		(11,663)
Amortization of premiums and accretion of discounts (net)	21,815	(9,131)		(18,619)
Purchase of investments	(3,381,699)	(5,298,446)		(2,224,370)
Proceeds from disposition of investments	3,570,304	4,755,862		1,713,538
Proceeds from principal payments of investments	284,166	186,094		190,720
Proceeds from investments sold short	1,461,459	1,606,561		947,556
Repurchase of investments sold short	(2,031,578)	(1,215,239)		(702,846)
Payments made to open financial derivatives	(331,643)	(61,080)		(25,624)
Proceeds received to close financial derivatives	301,902	85,572		42,643
Proceeds received to open financial derivatives	114,201	87,441		39,822
Payments made to close financial derivatives	(174,313)	(130,389)		(46,419)
Shares issued in connection with incentive fee payment	0	449		1,262
Share-based LTIP expense	393	267	[1]	179	[1]
(Increase) decrease in assets:
Repurchase agreements	66,301	(144,039)		(14,312)
Receivable for securities sold and financial derivatives	531,844	(354,587)		(256,086)
Due from brokers	5,360	(64,394)		(59,827)
Interest and principal receivable	167	(13,780)		(1,112)
Restricted cash	(4,857)	0		0
Other assets	(3,295)	(565)		(1,095)
Increase (decrease) in liabilities:
Due to brokers	92,573	2,462		(11,192)
Payable for securities purchased and financial derivatives	66,618	(94,300)		135,714
Accounts payable and accrued expenses	846	1,205		(75)
Incentive fee payable	0	(3,091)		(4,252)
Other liabilities	828	0		(903)
Interest and dividends payable	(580)	865		789
Base management fee payable	(190)	599		430
Net cash provided by (used in) operating activities	654,246	(604,159)		(244,382)
Cash flows provided by (used in) financing activities:
Proceeds from the issuance of shares	0	188,400		125,600
Contributions from non-controlling interests	2,153	1,793		5,880
Shares repurchased	(5,639)	0		0
Offering costs paid	(56)	(288)		(444)
Dividends paid	(83,460)	(86,449)		(92,067)
Distributions to non-controlling Interest	(1,468)	(1,667)		(260)
Principal payments on securitized debt	(763)	(246)		(370)
Borrowings under Reverse Repurchase Agreements	9,758,474	23,414,375	[2]	3,286,194	[2]
Repayments of reverse repurchase agreements	(10,253,718)	(22,981,108)	[2]	(2,955,746)	[2]
Net cash provided by (used in) financing activities	(584,477)	534,810		368,787
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	69,769	(69,349)		124,405
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	114,140	183,489		59,084
CASH AND CASH EQUIVALENTS, END OF PERIOD	183,909	114,140		183,489
Supplemental disclosure of cash flow information:
Interest paid	12,112	9,544		10,389
Shares issued in connection with incentive fee payment (non-cash)	0	449		1,262
Share-based LTIP awards (non-cash)	393	267	[1]	179	[1]
Aggregate TBA trade activity (buys sells) (non-cash)	$ 36,357,456	$ 30,136,820		$ 24,946,079

[1] Conformed to current period presentation.

[2] Conformed to current period presentation.