Condensed Consolidated Statement of Cash Flows $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Statement of Cash Flows [Abstract]
NET INCREASE IN EQUITY RESULTING FROM OPERATIONS		$ 43,508
Reconciliation of the net increase (decrease) 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		(10,020)
Change in net unrealized (gain) loss on investments, other secured borrowings, financial derivatives, and foreign currency translation		(6,921)
Amortization of premiums and accretion of discounts, net		22,949
Purchase of investments		(1,979,605)
Proceeds from disposition of investments		1,102,018
Proceeds from principal payments of investments		272,374
Repurchase of investments sold short		(1,404,952)
Payments on financial derivatives		(65,916)
Proceeds from financial derivatives		62,386
Amortization of deferred debt issuance costs		132
Share-based long term incentive plan unit expense	$ 230	192
Interest income related to consolidated securitization trust		(1,765)	[1]
Interest expense related to consolidated securitization trust		1,765	[1]
Repurchase agreements		(58,462)
(Increase) decrease in assets:
Receivable for securities sold and financial derivatives		(161,965)
Due from brokers, net		56,208
Interest and principal receivable		(2,781)
Other assets		19,371
Increase (decrease) in liabilities:
Due to brokers		1,529
Payable for securities purchased and financial derivatives		228,321
Accounts payable and accrued expenses		220
Incentive fee payable to affiliate		291
Other liabilities		(81)
Interest and dividends payable		887
Base management fee payable to affiliate		(92)
Net cash provided by (used in) operating activities	43,334	(223,688)
Cash Flows from Investing Activities:
Purchase of securities	(1,278,398)
Purchase of loans	(433,740)
Capital improvements of real estate owned	(240)
Proceeds from disposition of securities	1,047,270
Proceeds from disposition of loans	28,326
Contributions to investments in unconsolidated entities	(30,132)
Distributions from investments in unconsolidated entities	32,251
Proceeds from disposition of real estate owned	636
Proceeds from principal payments of securities	92,539
Proceeds from principal payments of loans	117,911
Proceeds from investments sold short	469,630	1,656,721
Repurchase of securities sold short	(498,774)
Payments on financial derivatives	(53,100)
Proceeds from financial derivatives	35,921
Payments made on reverse repurchase agreements	(2,626,503)
Proceeds from reverse repurchase agreements	2,786,295
Due from brokers, net	8,069
Due to brokers, net	(2,744)
Net cash provided by (used in) investing activities	(304,783)
Cash flows provided by (used in) financing activities:
Repurchase of common stock	(782)	(17,593)
Dividends paid	(25,298)	(25,501)
Contributions from non-controlling interests	7,448	2,165
Distributions to non-controlling interests	(9,531)	(10,457)
Proceeds from issuance of securitized debt	20,430	51,170
Proceeds from issuance of Other secured borrowings	70,988
Principal payments on Other secured borrowings	32,605	(13,449)
Borrowings under repurchase agreements	3,707,941	2,296,100
Repayments of repurchase agreements	3,479,161	(2,083,909)
Debt issuance costs related to Other secured borrowings, at fair value - financing activities	(1,034)
Due from brokers, net	1,818
Due to brokers, net	1,000
Net cash provided by (used in) financing activities	259,214	198,526
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	(2,235)	(25,162)
Cash, Cash Equivalents, and Restricted Cash, Beginning of Period	45,081	47,658
Cash, Cash Equivalents, and Restricted Cash, End of Period	42,846	22,496
Supplemental disclosure of cash flow information:
Interest paid	37,738	24,041
Income tax paid	117
Dividend payable	4,267
Share-based long term incentive plan unit awards (non-cash)	230	192
Transfers from mortgage loans to real estate owned (non-cash)	17,713
Aggregate TBA trade activity (buys sells) (non-cash)		14,759,189
Purchase of Investments Non Cash	(2,975)	10,831
Proceeds from principal payments of investments (non-cash)	41,628	22,807
Proceeds from the Disposition of Investments Non Cash		10,831
Principal payments on Other secured borrowings, at fair value (non-cash)	41,628	$ (22,807)
Repayments of repurchase agreement (non-cash)	(148,158)
Proceeds received from Other secured borrowings, at fair value (non-cash)	148,547
Repayment of senior notes (non-cash)	(86,000)
Issuance of senior notes (non-cash)	$ 86,000

[1] Related to non-qualified mortgage securitization transactions. See Note 6 for further details.