Consolidated Statement Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 19,417	$ 22,838	[1]
Reconciliation of the net increase in equity resulting from operations to net cash provided by (used in) operating activities:
Change in net unrealized (gain) loss on investments and financial derivatives, and foreign currency translation	7,625	2,624
Net realized (gain) loss on investments, financial derivatives, and foreign currency transactions	(10,658)	(11,189)
Amortization of premiums and accretion of discounts (net)	3,499	(3,553)
Purchase of investments	(1,055,646)	(712,690)
Proceeds from disposition of investments	1,220,580	681,516
Proceeds from principal payments of investments	69,620	32,581
Proceeds from investments sold short	1,395,115	824,365
Repurchase of investments sold short	(1,499,316)	(865,138)
Payments made to open financial derivatives	(59,067)	(10,416)
Proceeds received to close financial derivatives	73,336	15,413
Proceeds received to open financial derivatives	23,555	6,309
Payments made to close financial derivatives	(51,273)	(25,711)
Shares issued in connection with incentive fee payment	0	309
Share-based LTIP expense	98	63	[1]
(Increase) decrease in assets:
Repurchase agreements	127,247	(1,913)
Receivable for securities sold	7,253	50,164
Due from brokers	34,202	13,708
Interest and principal receivable	4,976	31
Other assets	(549)	(147)
Increase (decrease) in liabilities:
Due to brokers	10,554	11,098
Payable for securities purchased	17,529	38,762
Accounts payable and accrued expenses	420	471
Incentive fee payable	0	(3,091)
Other liabilities	13	0
Interest and dividends payable	(366)	(65)
Base management fee payable	(10)	0
Net cash provided by operating activities	338,154	66,339
Cash flows provided by (used in) financing activities:
Contributions from non-controlling interests	500	1,001
Dividends paid	(22,159)	(20,070)
Distributions to non-controlling Interest	(976)	(114)
Principal payments on securitized debt	(88)	(24)
Reverse repurchase agreements, net of repayments	(273,321)	(60,259)
Net cash used in financing activities	(296,044)	(79,466)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	42,110	(13,127)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	114,140	183,489
CASH AND CASH EQUIVALENTS, END OF PERIOD	156,250	170,362
Supplemental disclosure of cash flow information:
Interest paid	3,239	2,693
Shares issued in connection with incentive fee payment (non-cash)	0	309
Share-based LTIP awards (non-cash)	98	63	[1]
Aggregate TBA trade activity (buys sells) (non-cash)	$ 8,544,037	$ 6,215,156

[1] Conformed to current period presentation.