The following tables present a summary of our quarterly financial information for the periods indicated. (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Interest and dividend income	$ 23,585		$ 21,754	$ 20,646	$ 19,943	$ 19,926	$ 20,238	$ 19,652	$ 20,033	$ 85,928	$ 79,849	$ 82,875
Interest expense	2,731		1,466	1,254	1,245	1,344	1,473	1,848	2,007	6,696	6,672	18,445
Net interest and dividend income	20,854		20,288	19,392	18,698	18,582	18,765	17,804	18,026	79,232	73,177	64,430
Provision (credit) for loan losses	150		675	300	(425)	300	(100)	(1,200)	75	700	(925)	7,775
(Loss) gain on available-for-sale securities, net					(4)		2	(12)	(62)	(4)	(72)	1,965
Unrealized (losses) gains on marketable equity securities, net	19		(235)	(225)	(276)	(96)	11	6	(89)	(717)	(168)	109
Loss on interest rate swap termination								(402)			(402)	(2,353)
Gain on non-marketable equity investments	70		211	141		352			546	422	898
BOLI death benefit						555					555
Gain on defined benefit plan curtailment	2,807	[1]								2,807
Gain on sale of mortgages					2	289	665	242	227	2	1,423
Other non-interest income	2,757		2,614	2,825	2,626	2,756	2,617	2,575	2,382
Non-interest income	5,653		2,590	2,741	2,348	3,856	3,295	2,409	3,004	13,332	12,564	9,251
Non-interest expense	14,003		14,343	14,433	14,456	13,923	14,018	13,674	13,327	57,235	54,942	51,750
Income before income taxes	12,354		7,860	7,400	7,015	8,215	8,142	7,739	7,628	34,629	31,724	14,156
Income tax provision	3,320		1,861	1,865	1,696	1,995	2,106	2,087	1,837	8,742	8,025	2,941
Net income	$ 9,034		$ 5,999	$ 5,535	$ 5,319	$ 6,220	$ 6,036	$ 5,652	$ 5,791	$ 25,887	$ 23,699	$ 11,215
Basic earnings per share	$ 0.42		$ 0.28	$ 0.25	$ 0.24	$ 0.28	$ 0.27	$ 0.24	$ 0.24	$ 1.18	$ 1.02	$ 0.45
Diluted earnings per share	$ 0.42		$ 0.28	$ 0.25	$ 0.24	$ 0.28	$ 0.27	$ 0.24	$ 0.24	$ 1.18	$ 1.02	$ 0.45

[1] The increase in non-interest income for the three months ended December 31, 2022 was due to a $2.8 million gain on defined benefit plan curtailment resulting from the termination of the Company’s pension plan, which became effective October 31, 2022, subject to regulatory approvals.