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INCOME TAXES (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) Partnership | Dec. 31, 2015 USD ($) Partnership | Dec. 31, 2014 USD ($)
Provision for income taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Currently payable |  |  |  |  |  |  |  |  | $ 2,672,000 | $ 2,913,000 | $ 3,081,000
Deferred tax liability (asset) |  |  |  |  |  |  |  |  | 362,000 | (192,000) | 478,000
Provision for income taxes | $ 789,000 | $ 767,000 | $ 687,000 | $ 791,000 | $ 521,000 | $ 681,000 | $ 779,000 | $ 740,000 | 3,034,000 | 2,721,000 | 3,559,000
Deferred tax assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 4,518,000 |  |  |  | 4,238,000 |  |  |  | 4,518,000 | 4,238,000 |
Deferred compensation | 757,000 |  |  |  | 772,000 |  |  |  | 757,000 | 772,000 |
Merger & acquisition costs | 16,000 |  |  |  | 20,000 |  |  |  | 16,000 | 20,000 |
Allowance for losses on available-for-sale securities | 250,000 |  |  |  | 436,000 |  |  |  | 250,000 | 436,000 |
Pensions and other retirement obligation | 1,454,000 |  |  |  | 1,483,000 |  |  |  | 1,454,000 | 1,483,000 |
Interest on non-accrual loans | 1,259,000 |  |  |  | 1,001,000 |  |  |  | 1,259,000 | 1,001,000 |
Incentive plan accruals | 421,000 |  |  |  | 362,000 |  |  |  | 421,000 | 362,000 |
Other real estate owned | 152,000 |  |  |  | 136,000 |  |  |  | 152,000 | 136,000 |
Low income housing tax credits | 94,000 |  |  |  | 63,000 |  |  |  | 94,000 | 63,000 |
NOL carry forward | 709,000 |  |  |  | 950,000 |  |  |  | 709,000 | 950,000 |
AMT Credit Carryforward | 8,000 |  |  |  | 152,000 |  |  |  | 8,000 | 152,000 |
Other | 156,000 |  |  |  | 157,000 |  |  |  | 156,000 | 157,000 |
Total | 9,794,000 |  |  |  | 9,770,000 |  |  |  | 9,794,000 | 9,770,000 |
Deferred tax liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |
Premises and equipment | (998,000) |  |  |  | (919,000) |  |  |  | (998,000) | (919,000) |
Investment securities accretion | (189,000) |  |  |  | (177,000) |  |  |  | (189,000) | (177,000) |
Loan fees and costs | (369,000) |  |  |  | (154,000) |  |  |  | (369,000) | (154,000) |
Goodwill and core deposit intangibles | (3,573,000) |  |  |  | (3,594,000) |  |  |  | (3,573,000) | (3,594,000) |
Mortgage servicing rights | (233,000) |  |  |  | (238,000) |  |  |  | (233,000) | (238,000) |
Unrealized gains on available-for-sale securities | (673,000) |  |  |  | (1,135,000) |  |  |  | (673,000) | (1,135,000) |
Other | (17,000) |  |  |  | (44,000) |  |  |  | (17,000) | (44,000) |
Total | (6,052,000) |  |  |  | (6,261,000) |  |  |  | (6,052,000) | (6,261,000) |
Deferred tax asset, net | 3,742,000 |  |  |  | 3,509,000 |  |  |  | 3,742,000 | 3,509,000 |
Valuation allowance | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Total provision for income taxes reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Provision at statutory rates on pre-tax income |  |  |  |  |  |  |  |  | 5,328,000 | 4,878,000 | 5,761,000
Effect of tax-exempt income |  |  |  |  |  |  |  |  | (1,943,000) | (1,915,000) | (1,865,000)
Low income housing tax credits |  |  |  |  |  |  |  |  | (198,000) | (198,000) | (198,000)
Bank owned life insurance |  |  |  |  |  |  |  |  | (234,000) | (214,000) | (172,000)
Nondeductible interest |  |  |  |  |  |  |  |  | 55,000 | 61,000 | 60,000
Nondeductible merger and acquisition expenses |  |  |  |  |  |  |  |  | 0 | 102,000 | 0
Other items |  |  |  |  |  |  |  |  | 26,000 | 7,000 | (27,000)
Provision for income taxes | 789,000 | $ 767,000 | $ 687,000 | $ 791,000 | 521,000 | $ 681,000 | $ 779,000 | $ 740,000 | $ 3,034,000 | $ 2,721,000 | $ 3,559,000
Statutory tax rates |  |  |  |  |  |  |  |  | 34.00% | 34.00% | 34.00%
Effective tax rates |  |  |  |  |  |  |  |  | 19.40% | 19.00% | 21.00%
Minimum percentages of tax position liable to be realized upon ultimate settlement |  |  |  |  |  |  |  |  | 50.00% |  |
Liability for uncertain tax positions | 0 |  |  |  | 0 |  |  |  | $ 0 | $ 0 |
Unrecognized tax benefits | 0 |  |  |  | 0 |  |  |  | $ 0 | $ 0 |
Number of investments in Partnerships | Partnership |  |  |  |  |  |  |  |  | 4 | 4 |
Investment amount in partnerships | 700,000 |  |  |  | $ 959,000 |  |  |  | $ 700,000 | $ 959,000 |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment tax credits | $ 846,000 |  |  |  |  |  |  |  | 846,000 |  |
Amortization of investments in qualified affordable housing projects |  |  |  |  |  |  |  |  | $ 259,000 |  |
Investment Tax Credit Carryforward [Member] |  |  |  |  |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax credits recognition period |  |  |  |  |  |  |  |  | 6 years |  |
Tax credits recognized as reduction of tax expense amount |  |  |  |  |  |  |  |  | $ 198,000 |  |

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