Annual report pursuant to Section 13 and 15(d)

BANK PREMISES AND EQUIPMENT (Narrative) (Details)

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BANK PREMISES AND EQUIPMENT (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
BANK PREMISES AND EQUIPMENT [Abstract]      
Depreciation expense $ 10,742,000us-gaap_DepreciationAmortizationAndAccretionNet $ 6,024,000us-gaap_DepreciationAmortizationAndAccretionNet $ 6,631,000us-gaap_DepreciationAmortizationAndAccretionNet
Renewable lease period, maximum 20 years    
Rental expense $ 8,100,000us-gaap_OperatingLeasesRentExpenseNet $ 5,700,000us-gaap_OperatingLeasesRentExpenseNet $ 5,900,000us-gaap_OperatingLeasesRentExpenseNet