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SECURITIES AVAILABLE FOR SALE - Summary of AFS Securities with Unrealized Losses (Details) $ in Thousands | Mar. 31, 2018 USD ($) security | Dec. 31, 2017 USD ($) security
--- | --- | ---
Number of Securities |  |
Less Than 12 Months | security | 40 | 19
12 Months or More | security | 7 | 6
Total | security | 47 | 25
Fair Value |  |
Less Than 12 Months | $ 189,954 | $ 117,391
12 Months or More | 42,202 | 43,044
Total | 232,156 | 160,435
Unrealized Losses |  |
Less Than 12 Months | 3,350 | 1,968
12 Months or More | 2,562 | 1,926
Total | $ 5,912 | $ 3,894
States and political subdivisions |  |
Number of Securities |  |
Less Than 12 Months | security | 27 | 7
12 Months or More | security | 1 | 1
Total | security | 28 | 8
Fair Value |  |
Less Than 12 Months | $ 56,735 | $ 24,577
12 Months or More | 5,434 | 5,585
Total | 62,169 | 30,162
Unrealized Losses |  |
Less Than 12 Months | 1,500 | 473
12 Months or More | 144 | 5
Total | $ 1,644 | $ 478
GSE residential CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 3 | 4
12 Months or More | security | 6 | 5
Total | security | 9 | 9
Fair Value |  |
Less Than 12 Months | $ 50,240 | $ 25,155
12 Months or More | 36,768 | 37,459
Total | 87,008 | 62,614
Unrealized Losses |  |
Less Than 12 Months | 1,074 | 914
12 Months or More | 2,418 | 1,921
Total | $ 3,492 | $ 2,835
Private label commercial CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 4 | 2
12 Months or More | security | 0 | 0
Total | security | 4 | 2
Fair Value |  |
Less Than 12 Months | $ 12,689 | $ 7,653
12 Months or More | 0 | 0
Total | 12,689 | 7,653
Unrealized Losses |  |
Less Than 12 Months | 225 | 156
12 Months or More | 0 | 0
Total | $ 225 | $ 156
Asset-backed and other |  |
Number of Securities |  |
Less Than 12 Months | security | 6 | 6
12 Months or More | security | 0 | 0
Total | security | 6 | 6
Fair Value |  |
Less Than 12 Months | $ 70,290 | $ 60,006
12 Months or More | 0 | 0
Total | 70,290 | 60,006
Unrealized Losses |  |
Less Than 12 Months | 551 | 425
12 Months or More | 0 | 0
Total | $ 551 | $ 425

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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