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	Dec. 31, 2013		Dec. 31, 2012
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	$ 5,005		$ 169
Net Amounts of Assets Presented in the Balance Sheet	(11,792)		(40,487)
Cash Collateral Received	25,502		49,972
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	11,304		32,868
Offsetting Derivatives Assets [Member] | Counterparty 1 [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	4,324		128
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Assets Presented in the Balance Sheet	4,324		128
Financial Instruments	(4,324)	[1]	(128)	[1]
Cash Collateral Received	0	[1]	0	[1]
Net Amount	0		0
Offsetting Derivatives Assets [Member] | Counterparty 2 [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	681		41
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Assets Presented in the Balance Sheet	681		41
Financial Instruments	(681)	[1]	(41)	[1]
Cash Collateral Received	0	[1]	0	[1]
Net Amount	0		0
Offsetting Derivatives Assets [Member] | Derivative Counterparties [Member]
Offsetting of derivative assets [Abstract]
Gross Amounts of Recognized Assets	5,005		169
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Assets Presented in the Balance Sheet	5,005		169
Financial Instruments	(5,005)	[1]	(169)	[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	12,504,401	[2]	12,831,899	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	12,504,401	[1],[2]	12,831,899	[1],[2]
Financial Instruments	(12,492,609)	[3]	(12,791,412)	[3]
Cash Collateral Pledged	(11,792)	[3]	(39,671)	[3]
Net Amount	0		816
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	12,487,604	[2]	12,791,243	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	12,487,604	[1],[2]	12,791,243	[1],[2]
Financial Instruments	(12,487,604)	[3]	(12,791,243)	[3]
Cash Collateral Pledged	0	[3]	0	[3]
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	7,628	[2]	26,904	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	7,628	[1],[2]	26,904	[1],[2]
Financial Instruments	(4,324)	[3]	(128)	[3]
Cash Collateral Pledged	(3,304)	[3]	(26,776)	[3]
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	7,588	[2]	12,357	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	7,588	[1],[2]	12,357	[1],[2]
Financial Instruments	(681)	[3]	(41)	[3]
Cash Collateral Pledged	(6,907)	[3]	(11,500)	[3]
Net Amount	0		816
Offsetting Financial Liabilities and Derivative Liabilities [Member] | Counterparty 3 [Member]
Offsetting of financial liabilities and derivative liabilities [Abstract]
Gross Amounts of Recognized Liabilities	1,581	[2]	1,395	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	1,581	[1],[2]	1,395	[1],[2]
Financial Instruments	0	[3]	0	[3]
Cash Collateral Pledged	(1,581)	[3]	(1,395)	[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	16,797	[2]	40,656	[2]
Gross Amounts Offset in the Balance Sheet	0		0
Net Amounts of Liabilities Presented in the Balance Sheet	16,797	[1],[2]	40,656	[1],[2]
Financial Instruments	(5,005)	[3]	(169)	[3]
Cash Collateral Pledged	(11,792)	[3]	(39,671)	[3]
Net Amount	$ 0		$ 816

[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 $5.5 million and $7.8 million on interest rate swap agreements and $4.7 million and $7.0 million on repurchase arrangements and similar borrowings, included in “Accounts payable and accrued expenses” on the face of the Balance Sheets as of December 31, 2013 and December 31, 2012, 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.