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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2018
Investment Securities Available For Sale [Abstract] |
Schedule of Amortized Cost and Approximate Fair Value of Securities Available for Sale | A summary of amortized cost and approximate fair value of investment securities available for sale included in the consolidated statements of condition as of September 30, 2018 and December 31, 2017 follows:
|  | September 30, 2018 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government-sponsored agencies |  | $ | 101,646 |  |  | $ | 3 |  |  | $ | (2,391 | ) |  | $ | 99,258 |
Mortgage-backed securities –residential |  |  | 249,011 |  |  |  | 228 |  |  |  | (5,343 | ) |  |  | 243,896 |
SBA pool securities |  |  | 4,229 |  |  |  | — |  |  |  | (47 | ) |  |  | 4,182 |
State and political subdivisions |  |  | 18,343 |  |  |  | 27 |  |  |  | (197 | ) |  |  | 18,173 |
Corporate bond |  |  | 3,000 |  |  |  | 45 |  |  |  | — |  |  |  | 3,045 |
Total |  | $ | 376,229 |  |  | $ | 303 |  |  | $ | (7,978 | ) |  | $ | 368,554 |
|  | December 31, 2017 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government-sponsored agencies |  | $ | 44,476 |  |  | $ | — |  |  | $ | (775 | ) |  | $ | 43,701 |
Mortgage-backed securities – residential |  |  | 244,913 |  |  |  | 583 |  |  |  | (2,380 | ) |  |  | 243,116 |
SBA pool securities |  |  | 5,262 |  |  |  | — |  |  |  | (57 | ) |  |  | 5,205 |
State and political subdivisions |  |  | 24,910 |  |  |  | 87 |  |  |  | (129 | ) |  |  | 24,868 |
Corporate bond |  |  | 3,000 |  |  |  | 82 |  |  |  | — |  |  |  | 3,082 |
Single-issuer trust preferred security |  |  | 2,999 |  |  |  | — |  |  |  | (162 | ) |  |  | 2,837 |
CRA investment fund |  |  | 5,000 |  |  |  | — |  |  |  | (176 | ) |  |  | 4,824 |
Total |  | $ | 330,560 |  |  | $ | 752 |  |  | $ | (3,679 | ) |  | $ | 327,633 |
Schedule of Continuous Unrealized Loss Position and the Approximate Fair Value of these Investments | The following tables present the Company’s available for sale securities in a continuous unrealized loss position and the approximate fair value of these investments as of September 30, 2018 and December 31, 2017.
|  | September 30, 2018 |
|  | Duration of Unrealized Loss |
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Approximate |  |  |  |  |  |  | Approximate |  |  |  |  |  |  | Approximate |  |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(In thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government-sponsored agencies |  | $ | 53,581 |  |  | $ | (1,100 | ) |  | $ | 35,699 |  |  | $ | (1,291 | ) |  | $ | 89,280 |  |  | $ | (2,391 | )
Mortgage-backed securities-residential |  |  | 130,938 |  |  |  | (2,033 | ) |  |  | 94,037 |  |  |  | (3,310 | ) |  |  | 224,975 |  |  |  | (5,343 | )
SBA pool securities |  |  | — |  |  |  | — |  |  |  | 4,182 |  |  |  | (47 | ) |  |  | 4,182 |  |  |  | (47 | )
State and political subdivisions |  |  | 1,727 |  |  |  | (4 | ) |  |  | 7,258 |  |  |  | (193 | ) |  |  | 8,985 |  |  |  | (197 | )
Total |  | $ | 186,246 |  |  | $ | (3,137 | ) |  | $ | 141,176 |  |  | $ | (4,841 | ) |  | $ | 327,422 |  |  | $ | (7,978 | )
|  | December 31, 2017 |
|  | Duration of Unrealized Loss |
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Approximate |  |  |  |  |  |  | Approximate |  |  |  |  |  |  | Approximate |  |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(In thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government-sponsored agencies |  | $ | 32,166 |  |  | $ | (317 | ) |  | $ | 11,535 |  |  | $ | (458 | ) |  | $ | 43,701 |  |  | $ | (775 | )
Mortgage-backed securities-residential |  |  | 116,774 |  |  |  | (1,000 | ) |  |  | 71,646 |  |  |  | (1,380 | ) |  |  | 188,420 |  |  |  | (2,380 | )
SBA pool securities |  |  | — |  |  |  | — |  |  |  | 5,205 |  |  |  | (57 | ) |  |  | 5,205 |  |  |  | (57 | )
State and political subdivisions |  |  | 5,628 |  |  |  | (97 | ) |  |  | 3,760 |  |  |  | (32 | ) |  |  | 9,388 |  |  |  | (129 | )
Single-issuer trust preferred security |  |  | — |  |  |  | — |  |  |  | 2,837 |  |  |  | (162 | ) |  |  | 2,837 |  |  |  | (162 | )
CRA investment fund |  |  | — |  |  |  | — |  |  |  | 4,824 |  |  |  | (176 | ) |  |  | 4,824 |  |  |  | (176 | )
Total |  | $ | 154,568 |  |  | $ | (1,414 | ) |  | $ | 99,807 |  |  | $ | (2,265 | ) |  | $ | 254,375 |  |  | $ | (3,679 | )

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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