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INCOME TAXES (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) Partnership | Dec. 31, 2016 USD ($) Partnership | Dec. 31, 2015 USD ($)
Provision for income taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Currently payable |  |  |  |  |  |  |  |  | $ 4,583 | $ 2,672 | $ 2,913
Change in corporate tax rate |  |  |  |  |  |  |  |  | 1,531 | 0 | 0
Deferred tax |  |  |  |  |  |  |  |  | (83) | 362 | (192)
Provision for income taxes | $ 2,934 | $ 1,141 | $ 1,033 | $ 923 | $ 789 | $ 767 | $ 687 | $ 791 | 6,031 | 3,034 | 2,721
Deferred tax assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 3,058 |  |  |  | 4,518 |  |  |  | 3,058 | 4,518 |
Deferred compensation | 464 |  |  |  | 757 |  |  |  | 464 | 757 |
Merger & acquisition costs | 7 |  |  |  | 16 |  |  |  | 7 | 16 |
Allowance for losses on available-for-sale securities | 6 |  |  |  | 250 |  |  |  | 6 | 250 |
Pensions and other retirement obligation | 297 |  |  |  | 1,454 |  |  |  | 297 | 1,454 |
Interest on non-accrual loans | 917 |  |  |  | 1,259 |  |  |  | 917 | 1,259 |
Incentive plan accruals | 324 |  |  |  | 421 |  |  |  | 324 | 421 |
Other real estate owned | 108 |  |  |  | 152 |  |  |  | 108 | 152 |
Unrealized losses on available-for-sale securities | 71 |  |  |  | 0 |  |  |  | 71 | 0 |
Low income housing tax credits | 64 |  |  |  | 94 |  |  |  | 64 | 94 |
NOL carry forward | 339 |  |  |  | 709 |  |  |  | 339 | 709 |
AMT Credit Carryforward | 8 |  |  |  | 8 |  |  |  | 8 | 8 |
Other | 117 |  |  |  | 156 |  |  |  | 117 | 156 |
Total | 5,780 |  |  |  | 9,794 |  |  |  | 5,780 | 9,794 |
Deferred tax liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |
Premises and equipment | (623) |  |  |  | (998) |  |  |  | (623) | (998) |
Investment securities accretion | (66) |  |  |  | (189) |  |  |  | (66) | (189) |
Loan fees and costs | (257) |  |  |  | (369) |  |  |  | (257) | (369) |
Goodwill and core deposit intangibles | (2,200) |  |  |  | (3,573) |  |  |  | (2,200) | (3,573) |
Mortgage servicing rights | (146) |  |  |  | (233) |  |  |  | (146) | (233) |
Unrealized gains on available-for-sale securities | 0 |  |  |  | (673) |  |  |  | 0 | (673) |
Other | (7) |  |  |  | (17) |  |  |  | (7) | (17) |
Total | (3,299) |  |  |  | (6,052) |  |  |  | (3,299) | (6,052) |
Deferred tax asset, net | 2,481 |  |  |  | 3,742 |  |  |  | 2,481 | 3,742 |
Valuation allowance | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Total provision for income taxes reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Provision at statutory rates on pre-tax income |  |  |  |  |  |  |  |  | 6,505 | 5,328 | 4,878
Effect of tax-exempt income |  |  |  |  |  |  |  |  | (1,710) | (1,943) | (1,915)
Low income housing tax credits |  |  |  |  |  |  |  |  | (141) | (198) | (198)
Bank owned life insurance |  |  |  |  |  |  |  |  | (225) | (234) | (214)
Nondeductible interest |  |  |  |  |  |  |  |  | 54 | 55 | 61
Nondeductible merger and acquisition expenses |  |  |  |  |  |  |  |  | 0 | 0 | 102
Change in tax rate |  |  |  |  |  |  |  |  | 1,531 | 0 | 0
Other items |  |  |  |  |  |  |  |  | 17 | 26 | 7
Provision for income taxes | 2,934 | $ 1,141 | $ 1,033 | $ 923 | 789 | $ 767 | $ 687 | $ 791 | $ 6,031 | $ 3,034 | $ 2,721
Statutory tax rates |  |  |  |  |  |  |  |  | 34.00% | 34.00% | 34.00%
Effective tax rates |  |  |  |  |  |  |  |  | 31.60% | 19.40% | 19.00%
Minimum percentages of tax position liable to be realized upon ultimate settlement |  |  |  |  |  |  |  |  | 50.00% |  |
Liability for uncertain tax positions | 0 |  |  |  |  |  |  |  | $ 0 |  |
Unrecognized tax benefits | 0 |  |  |  |  |  |  |  | $ 0 |  |
Number of investments in partnerships | Partnership |  |  |  |  |  |  |  |  | 4 | 4 |
Investment amount in partnerships | 541 |  |  |  | $ 700 |  |  |  | $ 541 | $ 700 |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment tax credits | $ 705 |  |  |  |  |  |  |  | 705 |  |
Amortization of investments in other expenses |  |  |  |  |  |  |  |  | $ 159 | 259 | $ 259
Investment Tax Credit Carryforward [Member] |  |  |  |  |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax credits recognition period |  |  |  |  |  |  |  |  | 5 years |  |
Tax credits recognized as reduction of tax expense amount |  |  |  |  |  |  |  |  | $ 141 | $ 198 | $ 198

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