SECURITIES AVAILABLE FOR SALE - Summary of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Gross Unrealized Losses
Less Than Twelve Months	$ 7,927	$ 8,093
Over Twelve Months	860	803
Total	8,786	8,896
Fair Value
Less Than Twelve Months	328,650	311,765
Over Twelve Months	22,521	18,611
Total	351,171	330,376
Obligations of US Government sponsored enterprises
Gross Unrealized Losses
Less Than Twelve Months	0	0
Over Twelve Months	0	0
Total	0	0
Fair Value
Less Than Twelve Months	0	0
Over Twelve Months	0	0
Total	0	0
US Government-sponsored enterprises
Gross Unrealized Losses
Less Than Twelve Months	4,512	4,369
Over Twelve Months	538	496
Total	5,050	4,865
Fair Value
Less Than Twelve Months	215,895	197,914
Over Twelve Months	13,067	10,120
Total	228,962	208,034
US Government agency
Gross Unrealized Losses
Less Than Twelve Months	521	472
Over Twelve Months	149	141
Total	670	613
Fair Value
Less Than Twelve Months	42,042	36,941
Over Twelve Months	4,693	4,263
Total	46,735	41,204
Private label
Gross Unrealized Losses
Less Than Twelve Months	0	0
Over Twelve Months	10	11
Total	10	11
Fair Value
Less Than Twelve Months	0	107
Over Twelve Months	298	312
Total	298	419
Obligations of states and political subdivisions thereof
Gross Unrealized Losses
Less Than Twelve Months	2,872	3,252
Over Twelve Months	163	155
Total	3,034	3,407
Fair Value
Less Than Twelve Months	67,691	76,803
Over Twelve Months	4,463	3,916
Total	72,154	80,719
Corporate bonds
Gross Unrealized Losses
Less Than Twelve Months	22	0
Over Twelve Months	0	0
Total	22	0
Fair Value
Less Than Twelve Months	3,022	0
Over Twelve Months	0	0
Total	$ 3,022	$ 0