Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details)

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COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash $ 20,177 $ 33,595
Loans 2,239,193 1,959,929
Total pledged assets 2,807,612 2,533,517
AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 339,007 342,104
HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 209,235 197,889
Public deposits    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash 0 0
Loans 0 0
Total pledged assets 434,219 408,435
Public deposits | AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 224,984 210,546
Public deposits | HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 209,235 197,889
Repurchase agreements    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash 0 0
Loans 0 0
Total pledged assets 92,678 108,208
Repurchase agreements | AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 92,678 108,208
Repurchase agreements | HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 0 0
FHLB advances    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash 0 0
Loans 2,239,193 1,959,929
Total pledged assets 2,240,355 1,961,404
FHLB advances | AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 1,162 1,475
FHLB advances | HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 0 0
Derivatives    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash 20,177 33,595
Loans 0 0
Total pledged assets 24,251 37,971
Derivatives | AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 4,074 4,376
Derivatives | HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 0 0
Other purposes    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Cash 0 0
Loans 0 0
Total pledged assets 16,109 17,499
Other purposes | AFS Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged 16,109 17,499
Other purposes | HTM Securities    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Securities pledged $ 0 $ 0