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INVESTMENT SECURITIES (Schedule of Securities with Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Approximate Fair Value |  |
Less Than 12 Months | $ 186,246 | $ 154,568
12 Months or Longer | 141,176 | 99,807
Total | 327,422 | 254,375
Unrealized Losses |  |
Less Than 12 Months | (3,137) | (1,414)
12 Months or Longer | (4,841) | (2,265)
Total | (7,978) | (3,679)
U.S. Government-Sponsored Entities [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months | 53,581 | 32,166
12 Months or Longer | 35,699 | 11,535
Total | 89,280 | 43,701
Unrealized Losses |  |
Less Than 12 Months | (1,100) | (317)
12 Months or Longer | (1,291) | (458)
Total | (2,391) | (775)
Mortgage-Backed Securities-Residential [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months | 130,938 | 116,774
12 Months or Longer | 94,037 | 71,646
Total | 224,975 | 188,420
Unrealized Losses |  |
Less Than 12 Months | (2,033) | (1,000)
12 Months or Longer | (3,310) | (1,380)
Total | (5,343) | (2,380)
SBA Pool Securities [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months |  |
12 Months or Longer | 4,182 | 5,205
Total | 4,182 | 5,205
Unrealized Losses |  |
Less Than 12 Months |  |
12 Months or Longer | (47) | (57)
Total | (47) | (57)
State and Political Subdivisions [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months | 1,727 | 5,628
12 Months or Longer | 7,258 | 3,760
Total | 8,985 | 9,388
Unrealized Losses |  |
Less Than 12 Months | (4) | (97)
12 Months or Longer | (193) | (32)
Total | $ (197) | (129)
Single-Issuer Trust Preferred Security [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months |  |
12 Months or Longer |  | 2,837
Total |  | 2,837
Unrealized Losses |  |
Less Than 12 Months |  |
12 Months or Longer |  | (162)
Total |  | (162)
CRA Investment Fund [Member] |  |
Approximate Fair Value |  |
Less Than 12 Months |  |
12 Months or Longer |  | 4,824
Total |  | 4,824
Unrealized Losses |  |
Less Than 12 Months |  |
12 Months or Longer |  | (176)
Total |  | $ (176)

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