SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Corporation shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 shares
Organization and Nature of Operations [Abstract]
Ownership percentage	100.00%
Number of corporation used to acquire foreclosed real estate | Corporation	2
Loans and Loan Interest Income Recognition [Abstract]
Maximum period for accrued interest for all class of loans	90 days
Allowance for Loan Losses [Abstract]
Threshold for non-accrual loans to be evaluated individually for impairment	$ 250
Transfers of Financial Instruments [Abstract]
Servicing loan portfolio	189,000	$ 179,000
Mortgage servicing rights	2,000	2,000
Other Real Estate [Abstract]
Other Real Estate Owned ("OREO")	650	0
PREMISES AND EQUIPMENT [Abstract]
Impairment of long lived assets	0	0
Goodwill [Abstract]
Fair value of the assets acquired	814
Impairment of goodwill	0	0
Allowance for Contingent Liabilities [Abstract]
Allowance for contingent liabilities	$ 240	$ 290
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average common shares outstanding (in shares) | shares	11,766,912	11,649,240	11,582,807
Weighted average unvested restricted shares (in shares) | shares	115,735	107,211	43,547
Weighted average shares for basic earnings per share (in shares) | shares	11,882,647	11,756,451	11,626,354
Additional diluted shares [Abstract]
Stock options (in shares) | shares	89,725	77,053	55,788
Weighted average shares for diluted earnings per share (in shares) | shares	11,972,372	11,833,504	11,682,142
People's United [Member]
Business Acquisition [Line Items]
Number of common stock to receive after completion of merger (in shares) | shares	2.225