NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]  
Schedule of estimated useful lives of premises and equipment
Building and improvements 25 – 39 years
Leasehold improvements 5 – 15 years
Furniture and equipment 3 – 10 years
Schedule of weighted average assumptions used for valuing option grants
    2016     2015  
Dividend yield     0 %     0 %
Expected volatility     25 %     25 %
Risk-free interest rate     1.52 %     1.68 %
Expected average life     7 years       7 years  
Weighted average per share fair value of options   $ 11.04     $ 8.11  
Schedule of basic and diluted earnings per common share
    Years ended December 31,  
(in thousands, except per share data)   2016     2015     2014  
Net income, net of noncontrolling interest   $ 18,462     $ 11,428     $ 9,949  
Less preferred stock dividends     633       212       244  
Net income available to common shareholders   $ 17,829     $ 11,216     $ 9,705  
                         
Weighted average common shares outstanding     7,158       4,004       4,165  
Effect of dilutive stock instruments     356       358       146  
Diluted weighted average common shares outstanding     7,514       4,362       4,311  
                         
Basic earnings per common share   $ 2.49     $ 2.80     $ 2.33  
Diluted earnings per common share   $ 2.37     $ 2.57     $ 2.25