USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT, Offsetting Liabilities (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities		$ 46,954	$ 26,061
Offsetting Financial Liabilities and Derivative Liabilities [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]	12,243,889	10,124,887
Gross Amounts Offset in the Balance Sheet		1,375	2,962
Net Amounts of Liabilities Presented in the Balance Sheet	[2]	12,245,264	10,127,849
Financial Instruments	[3]	(12,189,084)	(10,098,566)
Cash Collateral Pledged	[3]	(56,180)	(29,283)
Net Amount		0	0
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Counterparty 1 [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]	42,029	26,311
Gross Amounts Offset in the Balance Sheet		0	0
Net Amounts of Liabilities Presented in the Balance Sheet	[2]	42,029	26,311
Financial Instruments	[3]	0	0
Cash Collateral Pledged	[3]	(42,029)	(26,311)
Net Amount		0	0
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Counterparty 2 [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]		776
Gross Amounts Offset in the Balance Sheet			23
Net Amounts of Liabilities Presented in the Balance Sheet	[2]		799
Financial Instruments	[3]		(23)
Cash Collateral Pledged	[3]		(776)
Net Amount			0
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Counterparty 4 [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]	15,277	6,954
Gross Amounts Offset in the Balance Sheet		1,375	2,939
Net Amounts of Liabilities Presented in the Balance Sheet	[2]	16,652	9,893
Financial Instruments	[3]	(2,501)	(7,697)
Cash Collateral Pledged	[3]	(14,151)	(2,196)
Net Amount		0	0
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Derivative Counterparties [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]	57,306	34,041
Gross Amounts Offset in the Balance Sheet		1,375	2,962
Net Amounts of Liabilities Presented in the Balance Sheet	[2]	58,681	37,003
Financial Instruments	[3]	(2,501)	(7,720)
Cash Collateral Pledged	[3]	(56,180)	(29,283)
Net Amount		0	0
Borrowings under Repurchase Arrangements [Member] | Offsetting Financial Liabilities and Derivative Liabilities [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	[1]	12,186,583	10,090,846
Gross Amounts Offset in the Balance Sheet		0	0
Net Amounts of Liabilities Presented in the Balance Sheet	[2]	12,186,583	10,090,846
Financial Instruments	[3]	(12,186,583)	(10,090,846)
Cash Collateral Pledged	[3]	0	0
Net Amount		$ 0	$ 0

[1] Amounts include accrued interest of $11.7 million and $10.9 million on interest rate swap agreements and $6.4 million and $9.3 million on borrowings under repurchase arrangements, included in "Accounts payable and accrued expenses" on the face of the Balance Sheets as of September 30, 2016 and December 31, 2015, respectively.

[2] Amounts presented are limited to recognized liabilities and cash collateral received associated with the indicated counterparty sufficient to reduce the related Net Amount to zero in accordance with ASU No. 2011-11, as amended by ASU No. 2013-01.

[3] Amounts presented are limited to recognized assets and collateral pledged associated with the indicated counterparty sufficient to reduce the related Net Amount to zero in accordance with ASU No. 2011-11, as amended by ASU No. 2013-01.