NET DEFERRED TAX ASSETS AND INCOME TAXES - Components of net deferred tax assets (Details) - Components of net deferred tax assets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets
Allowance for loan losses	$ 2,023	$ 1,877
Interest on non-performing loans	362	343
Accrued deferred compensation	268	153
Post-retirement benefits	17	17
Other real estate owned write-downs	184
Restricted stock awards	62	147
Mark-to-market purchase accounting adjustments	513	1,109
Write-down of securities	588	1,497
Other	64	22
Gross deferred tax assets	4,081	5,165
Deferred tax liabilities
Deferred loan costs, net	(457)	(436)
Goodwill and core deposit intangible asset	(848)	(853)
Accelerated depreciation	(1,048)	(1,130)
Mortgage servicing rights	(116)	(177)
Net unrealized holding gain on available-for-sale securities	(245)	(580)
Gross deferred tax liabilities	(2,714)	(3,176)
Net deferred tax asset	$ 1,367	$ 1,989