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SECURITIES AVAILABLE FOR SALE - Summary of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Unrealized Losses |  |
Less Than Twelve Months | $ 2,165 | $ 517
Over Twelve Months | 1,698 | 13,658
Total | 3,863 | 14,175
Fair Value |  |
Less Than Twelve Months | 112,232 | 50,873
Over Twelve Months | 82,201 | 428,272
Total | 194,433 | 479,145
US Government-sponsored enterprises |  |
Unrealized Losses |  |
Less Than Twelve Months | 1,074 | 155
Over Twelve Months | 1,006 | 9,289
Total | 2,080 | 9,444
Fair Value |  |
Less Than Twelve Months | 43,429 | 19,367
Over Twelve Months | 49,712 | 297,569
Total | 93,141 | 316,936
US Government agency |  |
Unrealized Losses |  |
Less Than Twelve Months | 432 | 16
Over Twelve Months | 115 | 1,919
Total | 547 | 1,935
Fair Value |  |
Less Than Twelve Months | 19,717 | 2,570
Over Twelve Months | 9,120 | 68,266
Total | 28,837 | 70,836
Private label |  |
Unrealized Losses |  |
Less Than Twelve Months | 380 | 79
Over Twelve Months | 367 | 5
Total | 747 | 84
Fair Value |  |
Less Than Twelve Months | 9,843 | 10,393
Over Twelve Months | 9,411 | 47
Total | 19,254 | 10,440
Obligations of states and political subdivisions thereof |  |
Unrealized Losses |  |
Less Than Twelve Months | 137 | 43
Over Twelve Months | 131 | 2,033
Total | 268 | 2,076
Fair Value |  |
Less Than Twelve Months | 29,355 | 6,784
Over Twelve Months | 1,682 | 47,930
Total | 31,037 | 54,714
Corporate bonds |  |
Unrealized Losses |  |
Less Than Twelve Months | 142 | 224
Over Twelve Months | 79 | 412
Total | 221 | 636
Fair Value |  |
Less Than Twelve Months | 9,888 | 11,759
Over Twelve Months | 12,276 | 14,460
Total | $ 22,164 | $ 26,219

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