USE OF DERIVATIVE FINANCIAL INSTRUMENTS, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Offsetting Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	$ 2,397		$ 5,005
Net Amounts of Assets Presented in the Balance Sheet	24,795		11,792
Cash Collateral Received	42,716		25,502
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	18,276		11,304
Counterparty 1 [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets			3,911
Gross Amounts Offset in the Balance Sheet			0
Net Amounts of Assets Presented in the Balance Sheet			3,911
Financial Instruments			(3,911)	[1]
Cash Collateral Received			0	[1]
Net Amount			0
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	15,785	[2]	6,002	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	15,785	[1]	6,002	[1]
Financial Instruments	0	[3]	(3,911)	[3]
Cash Collateral Pledged	(15,785)	[3]	(2,091)	[3]
Net Amount	0		0
Counterparty 2 [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	0		634
Gross Amounts Offset in the Balance Sheet	262		0
Net Amounts of Assets Presented in the Balance Sheet	262		634
Financial Instruments	(262)	[1]	(634)	[1]
Cash Collateral Received	0	[1]	0	[1]
Net Amount	0		0
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	5,316	[2]	6,352	[2]
Gross Amounts Offset in the Balance Sheet	262		0
Net Amounts of Liabilities Presented in the Balance Sheet	5,578	[1]	6,352	[1]
Financial Instruments	(262)	[3]	(634)	[3]
Cash Collateral Pledged	(5,316)	[3]	(5,718)	[3]
Net Amount	0		0
Counterparty 3 [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	620	[2]	1,581	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	620	[1]	1,581	[1]
Financial Instruments	0	[3]	0	[3]
Cash Collateral Pledged	(620)	[3]	(1,581)	[3]
Net Amount	0		0
Counter party 4 [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	1,373		460
Gross Amounts Offset in the Balance Sheet	762		0
Net Amounts of Assets Presented in the Balance Sheet	2,135		460
Financial Instruments	(2,135)	[1]	(460)	[1]
Cash Collateral Received	0	[1]	0	[1]
Net Amount	0		0
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	4,447	[2]	2,862	[2]
Gross Amounts Offset in the Balance Sheet	762		0
Net Amounts of Liabilities Presented in the Balance Sheet	5,209	[1]	2,862	[1]
Financial Instruments	(2,135)	[3]	(460)	[3]
Cash Collateral Pledged	(3,074)	[3]	(2,402)	[3]
Net Amount	0		0
Derivative Counterparties [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	1,373		5,005
Gross Amounts Offset in the Balance Sheet	1,024		0
Net Amounts of Assets Presented in the Balance Sheet	2,397		5,005
Financial Instruments	(2,397)	[1]	(5,005)	[1]
Cash Collateral Received	0	[1]	0	[1]
Net Amount	0		0
Offsetting Financial Liabilities and Derivative Liabilities [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	12,778,479	[2]	12,504,401	[2]
Gross Amounts Offset in the Balance Sheet	1,024		0
Net Amounts of Liabilities Presented in the Balance Sheet	12,779,503	[1]	12,504,401	[1]
Financial Instruments	(12,754,708)	[3]	(12,492,609)	[3]
Cash Collateral Pledged	(24,795)	[3]	(11,792)	[3]
Net Amount	0		0
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Repurchase Arrangements and Similar Borrowings [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	12,752,311	[2]	12,487,604	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	12,752,311	[1]	12,487,604	[1]
Financial Instruments	(12,752,311)	[3]	(12,487,604)	[3]
Cash Collateral Pledged	0	[3]	0	[3]
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	26,168	[2]	16,797	[2]
Gross Amounts Offset in the Balance Sheet	1,024		0
Net Amounts of Liabilities Presented in the Balance Sheet	27,192	[1]	16,797	[1]
Financial Instruments	(2,397)	[3]	(5,005)	[3]
Cash Collateral Pledged	(24,795)	[3]	(11,792)	[3]
Net Amount	$ 0		$ 0

[1] 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.

[2] Amounts include accrued interest of $8.9 million and $5.5 million on interest rate swap agreements and $2.5 million and $4.7 million on repurchase arrangements and similar borrowings, included in "Accounts payable and accrued expenses" on the face of the Balance Sheets as of September 30, 2014 and December 31, 2013, respectively.

[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.