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INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Investment Securities |  |
Less than 12 months Fair Value | $ 35,402 | $ 20,188
Less than 12 months Unrealized Loss | (831) | (198)
12 months or more Fair Value | 38,901 | 40,641
12 months or more Unrealized Loss | (1,755) | (1,084)
Total Fair Value | 74,303 | 60,829
Total Unrealized Loss | (2,586) | (1,282)
Collaterized mortgage obligations |  |
Investment Securities |  |
Less than 12 months Fair Value | 6,053 | 6,531
Less than 12 months Unrealized Loss | (169) | (62)
12 months or more Fair Value | 14,783 | 15,678
12 months or more Unrealized Loss | (749) | (507)
Total Fair Value | 20,836 | 22,209
Total Unrealized Loss | (918) | (569)
Agency mortgage-backed securities. |  |
Investment Securities |  |
Less than 12 months Fair Value | 8,799 | 6,802
Less than 12 months Unrealized Loss | (273) | (80)
12 months or more Fair Value | 18,019 | 18,218
12 months or more Unrealized Loss | (783) | (420)
Total Fair Value | 26,818 | 25,020
Total Unrealized Loss | (1,056) | (500)
Municipal securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 17,130 | 2,396
Less than 12 months Unrealized Loss | (310) | (11)
12 months or more Fair Value | 6,099 | 6,230
12 months or more Unrealized Loss | (223) | (148)
Total Fair Value | 23,229 | 8,626
Total Unrealized Loss | (533) | (159)
U.S. Government agency securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 1,935 | 2,965
Less than 12 months Unrealized Loss | (64) | (37)
12 months or more Fair Value |  | 515
12 months or more Unrealized Loss |  | (9)
Total Fair Value | 1,935 | 3,480
Total Unrealized Loss | (64) | (46)
U.S. Treasury securities |  |
Investment Securities |  |
Less than 12 months Fair Value | 1,485 | 1,494
Less than 12 months Unrealized Loss | (15) | (8)
Total Fair Value | 1,485 | 1,494
Total Unrealized Loss | $ (15) | $ (8)

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