Annual report pursuant to Section 13 and 15(d)

DEPOSITS (Narrative) (Details)

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DEPOSITS (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Cash and Cash Equivalents [Line Items]    
Time deposits held in Certificates of Deposit $ 1,328,646  
Deposit overdrafts as other consumer loans 1,300 $ 1,200
CDARS    
Cash and Cash Equivalents [Line Items]    
Time deposits held in Certificates of Deposit $ 13,900 $ 1,000
Maximum | CDARS    
Cash and Cash Equivalents [Line Items]    
Maturity of deposits held in Certificate of Deposits 1 year