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AVAILABLE-FOR-SALE INVESTMENT SECURITIES (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings |  |  |
OTTI credit losses | $ 0 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities | $ 0 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities |
Gross realized gains |  |  |
Gross realized gains | 4,404 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 3,545 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains |
Corporate debt securities | Non-investment grade |  |  |
Gross realized gains |  |  |
Gross realized gains | 960 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains / us-gaap_ExternalCreditRatingByGroupingAxis = us-gaap_ExternalCreditRatingNonInvestmentGradeMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Available-for-sale investment securities |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings |  |  |
Beginning balance | 112,338 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember |  | 115,511 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember
Reduction for securities sold | (5,650)us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember |  |
Ending balance | $ 106,688 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember | $ 115,511 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember | $ 115,511 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld / us-gaap_InformationByCategoryOfDebtSecurityAxis = us-gaap_AvailableforsaleSecuritiesMember

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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- Definition This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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- Definition The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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