DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details 5) - USD ($)		12 Months Ended
		Dec. 31, 2014		Dec. 31, 2013
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 594,877,852		$ 412,172,000
Repurchase Agreement Counterparties, Percentage of total amount outstanding		100.00%		100.00%
Repurchase Agreement Counterparties, Weighted average days to maturity		36 days		18 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 695,421,955		$ 444,984,955
Linked Repurchase Agreements [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 149,293,000
Repurchase Agreement Counterparties, Percentage of total amount outstanding		100.00%
Repurchase Agreement Counterparties, Weighted average days to maturity		25 days		21 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 210,238,657
North America [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 388,138,820	[1]	$ 261,289,000	[2]
Repurchase Agreement Counterparties, Percentage of total amount outstanding		65.25%		63.39%
Repurchase Agreement Counterparties, Weighted average days to maturity		19 days		20 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 463,615,686		$ 277,808,885
North America [Member] | Linked Repurchase Agreements [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 86,985,000		$ 52,871,000
Repurchase Agreement Counterparties, Percentage of total amount outstanding		58.26%		86.42%
Repurchase Agreement Counterparties, Weighted average days to maturity		33 days		21 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 124,620,916		$ 79,528,540
Europe [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 93,350,032	[1],[3]	$ 53,392,000	[2],[4]
Repurchase Agreement Counterparties, Percentage of total amount outstanding		15.69%	[3]	12.96%	[4]
Repurchase Agreement Counterparties, Weighted average days to maturity	[3]	21 days		21 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 113,286,452	[3]	$ 60,226,443	[4]
Europe [Member] | Linked Repurchase Agreements [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding	[3]	$ 46,381,000		$ 3,323,000
Repurchase Agreement Counterparties, Percentage of total amount outstanding	[3]	31.07%		5.43%
Repurchase Agreement Counterparties, Weighted average days to maturity	[3]	15 days		43 days
Repurchase Agreement Counterparties, Company RMBS held as collateral	[3]	$ 62,487,229		$ 6,303,837
Asia [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding		$ 113,389,000	[1],[3]	$ 97,491,000	[2],[4]
Repurchase Agreement Counterparties, Percentage of total amount outstanding		19.06%	[3]	23.65%	[4]
Repurchase Agreement Counterparties, Weighted average days to maturity	[3]	122 days		12 days
Repurchase Agreement Counterparties, Company RMBS held as collateral		$ 118,519,817	[3]	$ 106,949,627	[4]
Asia [Member] | Linked Repurchase Agreements [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparties, Amount Outstanding	[3]	$ 15,927,000		$ 4,987,000
Repurchase Agreement Counterparties, Percentage of total amount outstanding	[3]	10.67%		8.15%
Repurchase Agreement Counterparties, Weighted average days to maturity	[3]	9 days		7 days
Repurchase Agreement Counterparties, Company RMBS held as collateral	[3]	$ 23,130,512		$ 8,790,416

[1] At December 31, 2014, the Company had repurchase agreements of $85,497,000 and $63,796,000 that were linked to Non-Agency RMBS and Multi-Family MBS purchases, respectively, and were accounted for as Linked Transactions, and as such, the linked repurchase agreements are not included in the above table. (See Note 3).

[2] At December 31, 2013, the Company had repurchase agreements of $61,181,000 that were linked to Non-Agency RMBS purchases and were accounted for as Linked Transactions, and as such, the linked repurchase agreements are not included in the above table. (See Note 3).

[3] Counterparties domiciled in Europe and Asia, or their U.S. subsidiaries.

[4] Counterparties domiciled in Europe and Asia, or their U.S. subsidiaries.