LOANS AND ALLOWANCE FOR LOAN LOSSES - Average Impaired Loans and Interest Recognized (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment $ 22,521 $ 12,064 $ 9,100
Interest Income Recognized 862 693 $ 405
Commercial and industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 9,427 5,738  
Interest Income Recognized 442 309  
Mortgage warehouse      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
Commercial real estate (including multi-family residential) | Commercial real estate (including multi-family residential)      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 12,840 5,955  
Interest Income Recognized 393 362  
Commercial real estate (including multi-family residential) | Commercial real estate construction and land development      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
Commercial real estate (including multi-family residential) | 1-4 family residential (including home equity)      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 228 248  
Interest Income Recognized 24 13  
Commercial real estate (including multi-family residential) | Residential construction      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
Consumer and other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Average Recorded Investment 26 123  
Interest Income Recognized $ 3 $ 9