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