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SECURITIES AVAILABLE FOR SALE - Summary of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Gross Unrealized Losses |  |
Less Than Twelve Months | $ 1,155 | $ 517
Over Twelve Months | 1,605 | 13,658
Total | 2,760 | 14,175
Fair Value |  |
Less Than Twelve Months | 79,619 | 50,873
Over Twelve Months | 78,858 | 428,272
Total | 158,477 | 479,145
US Government-sponsored enterprises |  |
Gross Unrealized Losses |  |
Less Than Twelve Months | 140 | 155
Over Twelve Months | 1,188 | 9,289
Total | 1,328 | 9,444
Fair Value |  |
Less Than Twelve Months | 30,711 | 19,367
Over Twelve Months | 60,174 | 297,569
Total | 90,885 | 316,936
US Government agency |  |
Gross Unrealized Losses |  |
Less Than Twelve Months | 117 | 16
Over Twelve Months | 100 | 1,919
Total | 217 | 1,935
Fair Value |  |
Less Than Twelve Months | 10,691 | 2,570
Over Twelve Months | 9,767 | 68,266
Total | 20,458 | 70,836
Private label |  |
Gross Unrealized Losses |  |
Less Than Twelve Months | 385 | 79
Over Twelve Months | 4 | 5
Total | 389 | 84
Fair Value |  |
Less Than Twelve Months | 19,573 | 10,393
Over Twelve Months | 39 | 47
Total | 19,612 | 10,440
Obligations of states and political subdivisions thereof |  |
Gross Unrealized Losses |  |
Less Than Twelve Months | 20 | 43
Over Twelve Months | 127 | 2,033
Total | 147 | 2,076
Fair Value |  |
Less Than Twelve Months | 4,138 | 6,784
Over Twelve Months | 1,692 | 47,930
Total | 5,830 | 54,714
Corporate bonds |  |
Gross Unrealized Losses |  |
Less Than Twelve Months | 493 | 224
Over Twelve Months | 186 | 412
Total | 679 | 636
Fair Value |  |
Less Than Twelve Months | 14,506 | 11,759
Over Twelve Months | 7,186 | 14,460
Total | $ 21,692 | $ 26,219

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