SECURITIES AVAILABLE FOR SALE - Gross unrealized losses and the related fair value of securities available for sale (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value $ 304,190 $ 56,919
Less than 12 months, Unrealized Losses 6,958 302
12 months or more, Fair Value 4,953 26,452
12 months or more, Unrealized Losses 120 519
Total, Fair Value 309,143 83,371
Total, Unrealized Losses 7,078 821
U.S. government sponsored enterprises    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 1,963  
Less than 12 months, Unrealized Losses 18  
12 months or more, Fair Value  
12 months or more, Unrealized Losses  
Total, Fair Value 1,963  
Total, Unrealized Losses 18  
State, County and Municipals    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 167,457 34,283
Less than 12 months, Unrealized Losses 4,629 112
12 months or more, Fair Value 1,300 12,702
12 months or more, Unrealized Losses 9 132
Total, Fair Value 168,757 46,985
Total, Unrealized Losses 4,638 244
Mortgage-backed securities    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 134,770 22,228
Less than 12 months, Unrealized Losses 2,311 167
12 months or more, Fair Value 3,653 13,750
12 months or more, Unrealized Losses 111 387
Total, Fair Value 138,423 35,978
Total, Unrealized Losses $ 2,422 554
Equity securities    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value   408
Less than 12 months, Unrealized Losses   23
12 months or more, Fair Value  
12 months or more, Unrealized Losses  
Total, Fair Value   408
Total, Unrealized Losses   $ 23