CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest and dividend income
Interest and fees on loans	$ 18,054	$ 18,666	$ 18,483
Interest on debt securities
Taxable	2,454	3,041	3,770
Tax exempt	2,030	2,210	2,231
Other interest and dividends	120	127	172
Total interest and dividend income	22,658	24,044	24,656
Interest expense
Deposits	2,414	3,165	4,364
Repurchase agreements	23	63	90
Federal Home Loan Bank of Boston advances	1,845	2,331	3,043
Total interest expense	4,282	5,559	7,497
Net interest and dividend income	18,376	18,485	17,159
Provision for loan losses	1,070	1,440	1,000
Net interest and dividend income after provision for loan losses	17,306	17,045	16,159
Non-interest income
Gains on securities, net	279	11	16
Trust and wealth advisory	2,945	2,548	2,102
Service charges and fees	2,189	2,090	2,006
Gains on sales of mortgage loans, net	1,596	687	816
Mortgage servicing, net	(21)	65	97
Other	326	255	270
Total non-interest income	7,314	5,656	5,307
Non-interest expense
Salaries	7,149	6,970	6,816
Employee benefits	2,912	2,493	2,253
Premises and equipment	2,408	2,330	2,099
Data processing	1,569	1,410	1,452
Professional fees	1,212	1,099	1,364
Collections and OREO	709	590	191
Litigation settlement	400
FDIC insurance	486	596	735
Marketing and community support	356	343	319
Amortization of intangibles	222	222	222
FHLBB advance prepayment fee	450
Other	1,681	1,586	1,662
Total non-interest expense	19,554	17,639	17,113
Income before income taxes	5,066	5,062	4,353
Income tax provision	989	950	693
Net income	4,077	4,112	3,660
Net income available to common shareholders	$ 3,861	$ 3,588	$ 3,198
Basic and diluted earnings per common share	$ 2.28	$ 2.12	$ 1.90
Common dividends per share	$ 1.12	$ 1.12	$ 1.12