CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and dividend income
Interest and fees on loans	$ 40,796	$ 39,742	$ 37,072
Interest on debt securities
Taxable	1,671	2,223	2,231
Tax exempt	672	545	136
Other interest and dividends	295	903	933
Total interest and dividend income	43,434	43,413	40,372
Interest expense
Deposits	3,890	7,324	4,656
Repurchase agreements	20	24	12
Finance lease	141	170	178
Note payable	14	16	18
Subordinated debt	618	624	624
Federal Home Loan Bank of Boston advances	605	1,143	1,733
Total interest expense	5,288	9,301	7,221
Net interest and dividend income	38,146	34,112	33,151
Provision for loan losses	5,038	955	1,728
Net interest and dividend income after provision for loan losses	33,108	33,157	31,423
Non-interest income
Trust and wealth advisory	4,194	3,995	3,700
Service charges and fees	3,072	4,028	3,718
Mortgage banking activities, net	1,621	423	397
Gains (losses) on CRA mutual fund	19	25	(18)
Gains on securities, net	196	263	318
Bank-owned life insurance (“BOLI”) income	495	392	337
Gain on bank-owned life insurance	601		341
Other	125	124	152
Total non-interest income	10,323	9,250	8,945
Non-interest expense
Salaries	11,828	12,048	12,003
Employee benefits	4,533	4,384	4,280
Premises and equipment	4,019	4,016	4,535
Data processing	2,211	2,201	2,119
Professional fees	2,741	2,213	2,236
OREO gains, losses and write-downs, net		408	275
Collections, OREO, and appraisals	323	436	578
FDIC insurance	466	261	579
Marketing and community support	573	619	815
Amortization of intangibles	321	388	454
Other	2,023	1,938	1,961
Total non-interest expense	29,038	28,912	29,835
Income before income taxes	14,393	13,495	10,533
Income tax provision	2,453	2,359	1,709
Net income	11,940	11,136	8,824
Net income available to common stock	$ 11,775	$ 10,976	$ 8,713
Basic earnings per common share	$ 4.21	$ 3.95	$ 3.15
Diluted earnings per common share	4.20	3.93	3.13
Common dividends per share	$ 1.16	$ 1.12	$ 1.12