DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	$ 995,000	$ 995,000
Net Amounts of Liabilities Presented	995,000	995,000
Counterparties assets
Assets, Derivatives
Gross Amounts of Recognized Assets	16,043	992
Net Amounts of Assets Presented	16,043	992
Gross Amounts Not Offset
Financial Instruments	(11,363)	(366)
Collateral Received	(4,680)	(626)
Assets, Resale Agreements
Gross Amounts of Recognized Assets	1,400,000	1,750,000
Net Amounts of Assets Presented	1,400,000	1,750,000
Gross Amounts Not Offset
Financial Instruments	(495,000)	(545,000)
Collateral Received	(905,000)	(1,205,000)
Counterparties liabilities
Liabilities, Derivatives
Gross Amounts of Recognized Liabilities	33,849	38,513
Net Amounts of Liabilities Presented	33,849	38,513
Gross Amounts Not Offset
Financial Instruments	(11,363)	(366)
Collateral Posted	(22,486)	(38,147)
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	995,000	995,000
Net Amounts of Liabilities Presented	995,000	995,000
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
Financial Instruments	(495,000)	(545,000)
Collateral Posted	$ (500,000)	$ (450,000)