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SECURITIES AVAILABLE FOR SALE - Summary of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Gross Unrealized Losses
Less Than Twelve Months	$ 459	$ 517
Over Twelve Months	7,526	13,658
Total	7,985	14,175
Fair Value
Less Than Twelve Months	46,545	50,873
Over Twelve Months	357,586	428,272
Total	404,131	479,145
US Government-sponsored enterprises
Gross Unrealized Losses
Less Than Twelve Months	15	155
Over Twelve Months	5,395	9,289
Total	5,410	9,444
Fair Value
Less Than Twelve Months	5,958	19,367
Over Twelve Months	259,984	297,569
Total	265,942	316,936
US Government agency
Gross Unrealized Losses
Less Than Twelve Months	17	16
Over Twelve Months	1,202	1,919
Total	1,219	1,935
Fair Value
Less Than Twelve Months	6,784	2,570
Over Twelve Months	60,359	68,266
Total	67,143	70,836
Private label
Gross Unrealized Losses
Less Than Twelve Months	145	79
Over Twelve Months	5	5
Total	150	84
Fair Value
Less Than Twelve Months	19,905	10,393
Over Twelve Months	45	47
Total	19,950	10,440
Obligations of states and political subdivisions thereof
Gross Unrealized Losses
Less Than Twelve Months	0	43
Over Twelve Months	824	2,033
Total	824	2,076
Fair Value
Less Than Twelve Months	0	6,784
Over Twelve Months	32,301	47,930
Total	32,301	54,714
Corporate bonds
Gross Unrealized Losses
Less Than Twelve Months	282	224
Over Twelve Months	100	412
Total	382	636
Fair Value
Less Than Twelve Months	13,898	11,759
Over Twelve Months	4,897	14,460
Total	$ 18,795	$ 26,219

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