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DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details 4) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Counterparties assets |  |
Assets, Derivatives |  |
Gross Amounts of Recognized Assets | $ 1,327 | $ 992
Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets | 1,327 | 992
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets |  |
Financial Instruments | (778) | (366)
Collateral Received | (549) | (626)
Assets, Resale Agreements |  |
Gross Amounts of Recognized Assets | 1,675,000 | 1,750,000
Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets | 1,675,000 | 1,750,000
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets |  |
Financial Instruments | (545,000) | (545,000)
Collateral Received | (1,130,000) | (1,205,000)
Counterparties liabilities |  |
Liabilities, Derivatives |  |
Gross Amounts of Recognized Liabilities | 37,304 | 38,513
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets | 37,304 | 38,513
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets |  |
Financial Instruments | (778) | (366)
Collateral Posted | (36,526) | (38,147)
Liabilities, Resale Agreements |  |
Gross Amounts of Recognized Liabilities | 995,000 | 995,000
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets | 995,000 | 995,000
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets |  |
Financial Instruments | (545,000) | (545,000)
Collateral Posted | $ (450,000) | $ (450,000)

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