CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income
Interest and fees on loans	$ 37,072	$ 33,090	$ 32,050
Interest on debt securities
Taxable	2,231	1,566	1,183
Tax exempt	136	380	927
Other interest and dividends	933	485	294
Total interest and dividend income	40,372	35,521	34,454
Interest expense
Deposits	4,656	2,483	2,181
Repurchase agreements	12	5	6
Capital lease	178	96	70
Note payable	18	18	21
Subordinated debt	624	624	624
Federal Home Loan Bank of Boston advances	1,733	1,012	947
Total interest expense	7,221	4,238	3,849
Net interest and dividend income	33,151	31,283	30,605
Provision for loan losses	1,728	1,020	1,835
Net interest and dividend income after provision for loan losses	31,423	30,263	28,770
Non-interest income
Trust and wealth advisory	3,700	3,477	3,338
Service charges and fees	3,718	3,718	3,133
Gains on sales of mortgage loans, net	89	125	229
Mortgage servicing, net	308	255	156
Losses on CRA mutual fund	(18)
Gain on securities, net	318	178	584
BOLI income and gains	678	343	353
Other	152	140	98
Total non-interest income	8,945	8,236	7,891
Non-interest expense
Salaries	12,003	11,135	10,926
Employee benefits	4,280	3,767	3,891
Premises and equipment	4,535	3,831	3,375
Data processing	2,119	2,057	2,106
Professional fees	2,236	2,499	1,933
OREO gains, losses and writedowns, net	275	1,716
Collections, OREO, and appraisals	578	463	999
FDIC insurance	579	497	606
Marketing and community support	815	793	686
Amortization of intangibles	454	533	601
Other	1,961	2,038	2,264
Total non-interest expense	29,835	29,329	27,387
Income before income taxes	10,533	9,170	9,274
Income tax provision	1,709	2,914	2,589
Net income	8,824	6,256	6,685
Net income available to common stock	$ 8,713	$ 6,201	$ 6,633
Basic earnings per common share	$ 3.15	$ 2.25	$ 2.43
Weighted average common shares outstanding, to calculate basic earnings per share	2,763	2,755	2,733
Diluted earnings per common share	$ 3.13	$ 2.24	$ 2.41
Weighted average common shares outstanding, to calculate diluted earnings per share	2,780	2,774	2,749
Common dividends per share	$ 1.12	$ 1.12	$ 1.12