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SECURITIES AVAILABLE FOR SALE - Summary of AFS Securities with Unrealized Losses (Details) $ in Thousands | Jun. 30, 2018 USD ($) security | Dec. 31, 2017 USD ($) security
--- | --- | ---
Number of Securities |  |
Less Than 12 Months | security | 48 | 19
12 Months or More | security | 8 | 6
Total | security | 56 | 25
Fair Value |  |
Less Than 12 Months | $ 221,308 | $ 117,391
12 Months or More | 45,581 | 43,044
Total | 266,889 | 160,435
Unrealized Losses |  |
Less Than 12 Months | 3,448 | 1,968
12 Months or More | 2,820 | 1,926
Total | $ 6,268 | $ 3,894
States and political subdivisions |  |
Number of Securities |  |
Less Than 12 Months | security | 32 | 7
12 Months or More | security | 1 | 1
Total | security | 33 | 8
Fair Value |  |
Less Than 12 Months | $ 58,408 | $ 24,577
12 Months or More | 5,423 | 5,585
Total | 63,831 | 30,162
Unrealized Losses |  |
Less Than 12 Months | 1,576 | 473
12 Months or More | 141 | 5
Total | $ 1,717 | $ 478
GSE residential CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 4 | 4
12 Months or More | security | 6 | 5
Total | security | 10 | 9
Fair Value |  |
Less Than 12 Months | $ 55,583 | $ 25,155
12 Months or More | 35,971 | 37,459
Total | 91,554 | 62,614
Unrealized Losses |  |
Less Than 12 Months | 1,078 | 914
12 Months or More | 2,549 | 1,921
Total | $ 3,627 | $ 2,835
Private label commercial CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 5 | 2
12 Months or More | security | 0 | 0
Total | security | 5 | 2
Fair Value |  |
Less Than 12 Months | $ 18,404 | $ 7,653
12 Months or More | 0 | 0
Total | 18,404 | 7,653
Unrealized Losses |  |
Less Than 12 Months | 290 | 156
12 Months or More | 0 | 0
Total | $ 290 | $ 156
Asset-backed and other |  |
Number of Securities |  |
Less Than 12 Months | security | 7 | 6
12 Months or More | security | 1 | 0
Total | security | 8 | 6
Fair Value |  |
Less Than 12 Months | $ 88,913 | $ 60,006
12 Months or More | 4,187 | 0
Total | 93,100 | 60,006
Unrealized Losses |  |
Less Than 12 Months | 504 | 425
12 Months or More | 130 | 0
Total | $ 634 | $ 425

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