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INVESTMENT SECURITIES - Portfolio of Available-for-Sale Securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Available-for-sale:    
Amortized Cost $ 317,375 $ 272,588
Gross Unrealized Gains 3,389 6,471
Gross Unrealized Losses 2,605 2,075
Fair Value 318,159 276,984
Obligations of state and political subdivisions    
Available-for-sale:    
Amortized Cost 30,750 43,079
Gross Unrealized Gains 770 1,555
Gross Unrealized Losses 27 29
Fair Value 31,493 44,605
U.S. Government sponsored enterprises    
Available-for-sale:    
Amortized Cost   10,339
Gross Unrealized Gains   0
Gross Unrealized Losses   112
Fair Value   10,227
GSE mortgage-backed securities    
Available-for-sale:    
Amortized Cost 84,946 106,208
Gross Unrealized Gains 2,321 3,183
Gross Unrealized Losses 229 288
Fair Value 87,038 109,103
Collateralized mortgage obligations: residential    
Available-for-sale:    
Amortized Cost 194,067 62,093
Gross Unrealized Gains 297 266
Gross Unrealized Losses 2,276 1,520
Fair Value 192,088 60,839
Collateralized mortgage obligations: commercial    
Available-for-sale:    
Amortized Cost 5,512 24,462
Gross Unrealized Gains 1 190
Gross Unrealized Losses 65 107
Fair Value 5,448 24,545
Other asset-backed securities    
Available-for-sale:    
Amortized Cost   24,041
Gross Unrealized Gains   321
Gross Unrealized Losses   19
Fair Value   24,343
Collateralized debt obligation    
Available-for-sale:    
Amortized Cost   266
Gross Unrealized Gains   952
Gross Unrealized Losses   0
Fair Value   1,218
Mutual funds    
Available-for-sale:    
Amortized Cost 2,100 2,100
Gross Unrealized Gains 0 4
Gross Unrealized Losses 8 0
Fair Value $ 2,092 $ 2,104