DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details 4) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	$ 1,005,211,000	$ 995,000,000
Gross Amounts Not Offset in the Consolidated Balance Sheets
Cash collateral received	3,600,000	0
Cash collateral posted	7,500,000	187,000
Counterparties assets
Assets, Derivatives
Gross Amounts of Recognized Assets	9,711,000	16,043,000
Net Amounts of Assets Presented	9,711,000	16,043,000
Gross Amounts Not Offset
Financial Instruments	(5,122,000)	(11,363,000)
Collateral Received	(4,589,000)	(4,680,000)
Assets, Resale Agreements
Gross Amounts of Recognized Assets	1,275,000,000	1,400,000,000
Net Amounts of Assets Presented	1,275,000,000	1,400,000,000
Gross Amounts Not Offset
Financial Instruments	(475,000,000)	(495,000,000)
Collateral Received	(800,000,000)	(905,000,000)
Counterparties liabilities
Liabilities, Derivatives
Gross Amounts of Recognized Liabilities	40,459,000	33,849,000
Net Amounts of Liabilities Presented	40,459,000	33,849,000
Gross Amounts Not Offset
Financial Instruments	(5,122,000)	(11,363,000)
Collateral Posted	(35,337,000)	(22,486,000)
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	1,005,211,000	995,000,000
Net Amounts of Liabilities Presented	1,005,211,000	995,000,000
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(475,000,000)	(495,000,000)
Collateral Posted	$ (530,211,000)	$ (500,000,000)