Annual report pursuant to Section 13 and 15(d)

SECURITIES (Schedule of Securities Pledged to Secure Public Deposits, Repurchase Agreements, and for Other Purposes) (Details)

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SECURITIES (Schedule of Securities Pledged to Secure Public Deposits, Repurchase Agreements, and for Other Purposes) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Available-for-sale Securities    
Schedule of Investments [Line Items]    
Total pledged AFS securities, fair value $ 342,104 $ 337,301
Available-for-sale Securities | Public deposits    
Schedule of Investments [Line Items]    
Total pledged AFS securities, fair value 210,546 184,635
Available-for-sale Securities | Repurchase agreements    
Schedule of Investments [Line Items]    
Total pledged AFS securities, fair value 108,208 126,120
Available-for-sale Securities | Other purposes    
Schedule of Investments [Line Items]    
Total pledged AFS securities, fair value [1] 23,350 26,546
Held-to-maturity Securities    
Schedule of Investments [Line Items]    
Total pledged HTM securities, fair value 197,889 207,140
Held-to-maturity Securities | Public deposits    
Schedule of Investments [Line Items]    
Total pledged HTM securities, fair value $ 197,889 $ 207,140
[1] (1) The "Other purposes" category consists of borrowings, derivatives, and accounts held at the Bank.