SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items]
Number of Full-service Bank Offices	22
Assets Held-in-trust	$ 195,000,000	$ 178,000,000
Total Loans Receivable	$ 907,910,000	852,960,000	$ 799,272,000
Number of minimum months for corporation to order updated valuation	18 months
Other Postretirement Benefit Expense	$ 96,000	$ 46,000	$ 29,000
Intangible asset amortization life	10 years
Weighted Average Number of Shares Outstanding, Basic	6,051,579	6,026,224	6,002,240
Restricted Stock
Summary of Significant Accounting Policies [Line Items]
Shares issued under plan (in shares)	7,435	5,673
Compensation expense	$ 59,000
Shares vested (in shares)	2,478
Shares expected to vest over next two years (in shares)	4,957
Weighted average remaining contractual term	2 years
Credit Concentration Risk
Summary of Significant Accounting Policies [Line Items]
Total Loans Receivable	$ 162,321,000
Concentration Risk, Percentage	17.90%
Residential Mortgage and Commercial Loans
Summary of Significant Accounting Policies [Line Items]
Threshold period past due to discontinue accrual interest on financing receivable	90 days
Consumer
Summary of Significant Accounting Policies [Line Items]
Total Loans Receivable	$ 14,704,000	$ 14,588,000	$ 15,277,000
Threshold period past due for charge off of financing receivable	120 days
Commercial real estate
Summary of Significant Accounting Policies [Line Items]
Total Loans Receivable	$ 318,980,000	$ 289,899,000	$ 281,582,000
Threshold period past due for Corporation to order updated valuation on financing receivable	90 days
Number of previous months with no updated valuation completed for Corporation to update validation	12 months
Number of maximum days of loan being classified as impaired for Corporation to order third party valuation	30 days
Commercial real estate | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term	20 years
Loan-to-value ratio	80.00%
Residential Mortgage
Summary of Significant Accounting Policies [Line Items]
Loan-to-value ratio	80.00%
Residential Mortgage | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term	30 years
Home Equity Line of Credit | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term	20 years
Loan-to-value ratio	90.00%
Buildings
Summary of Significant Accounting Policies [Line Items]
Useful life	40 years
Building Remodels and Additions
Summary of Significant Accounting Policies [Line Items]
Useful life	15 years
Bank Equipment | Minimum
Summary of Significant Accounting Policies [Line Items]
Useful life	5 years
Bank Equipment | Maximum
Summary of Significant Accounting Policies [Line Items]
Useful life	15 years