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CREDIT COMMITMENTS (Schedule of Credit Commitments and Standby Letters of Credit) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted $ 985,810us-gaap_GuaranteeObligationsMaximumExposure $ 813,122us-gaap_GuaranteeObligationsMaximumExposure
Commitments to extend credit    
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted 950,586us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_FinancialGuaranteeMember		 766,442us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_FinancialGuaranteeMember
Commercial and standby letters of credit    
Guarantor Obligations [Line Items]    
Guarantor obligations, maximum exposure, undiscounted $ 35,224us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_StandbyLettersOfCreditMember		 $ 46,680us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_GuaranteeObligationsByNatureAxis
= us-gaap_StandbyLettersOfCreditMember