Allowance for Loan Losses - Activity by Class (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 16,253				$ 11,639	$ 16,253	$ 11,639	$ 11,232
Chargeoffs									748	1,661	1,120
Recoveries									391	225	277
Provision (credit)	$ (1,950)	$ 525	$ 525	525	$ 1,500	$ 1,800	$ 2,350	400	(375)	6,050	1,250
Ending balance	15,521				16,253				15,521	16,253	11,639
Ending balance specifically evaluated for impairment	576				462				576	462	2,213
Ending balance collectively evaluated for impairment	14,945				15,791				14,945	15,791	9,426
Ending balance	1,647,649				1,476,761				1,647,649	1,476,761	1,297,075
Ending balance specifically evaluated for impairment	12,052				16,039				12,052	16,039	29,274
Ending balance collectively evaluated for impairment	1,635,597				1,460,722				1,635,597	1,460,722	1,267,801
Commercial | Real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				5,178				3,742	5,178	3,742	3,567
Chargeoffs									106	1,088	89
Recoveries									95	0	15
Provision (credit)									200	2,524	249
Ending balance	5,367				5,178				5,367	5,178	3,742
Ending balance specifically evaluated for impairment	42				112				42	112	251
Ending balance collectively evaluated for impairment	5,325				5,066				5,325	5,066	3,491
Ending balance	576,198				442,121				576,198	442,121	372,810
Ending balance specifically evaluated for impairment	1,428				3,029				1,428	3,029	6,309
Ending balance collectively evaluated for impairment	574,770				439,092				574,770	439,092	366,501
Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				662				365	662	365	255
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									84	297	110
Ending balance	746				662				746	662	365
Ending balance specifically evaluated for impairment	16				18				16	18	0
Ending balance collectively evaluated for impairment	730				644				730	644	365
Ending balance	79,365				56,565				79,365	56,565	38,084
Ending balance specifically evaluated for impairment	689				770				689	770	958
Ending balance collectively evaluated for impairment	78,676				55,795				78,676	55,795	37,126
Commercial | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				3,438				3,329	3,438	3,329	3,541
Chargeoffs									288	27	179
Recoveries									84	37	73
Provision (credit)									(404)	99	(106)
Ending balance	2,830				3,438				2,830	3,438	3,329
Ending balance specifically evaluated for impairment	381				169				381	169	1,273
Ending balance collectively evaluated for impairment	2,449				3,269				2,449	3,269	2,056
Ending balance	264,570				285,015				264,570	285,015	218,773
Ending balance specifically evaluated for impairment	1,303				1,779				1,303	1,779	7,075
Ending balance collectively evaluated for impairment	263,267				283,236				263,267	283,236	211,698
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				171				27	171	27	24
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									(14)	144	3
Ending balance	157				171				157	171	27
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	157				171				157	171	27
Ending balance	48,362				43,783				48,362	43,783	41,288
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	48,362				43,783				48,362	43,783	41,288
Residential | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				102				25	102	25	34
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									46	77	(9)
Ending balance	148				102				148	102	25
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	148				102				148	102	25
Ending balance	31,763				21,600				31,763	21,600	14,813
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	31,763				21,600				31,763	21,600	14,813
Residential | Term
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,579				1,024	2,579	1,024	1,235
Chargeoffs									42	66	445
Recoveries									66	34	57
Provision (credit)									130	1,587	177
Ending balance	2,733				2,579				2,733	2,579	1,024
Ending balance specifically evaluated for impairment	137				163				137	163	237
Ending balance collectively evaluated for impairment	2,596				2,416				2,596	2,416	787
Ending balance	550,783				522,070				550,783	522,070	492,455
Ending balance specifically evaluated for impairment	8,173				9,414				8,173	9,414	12,439
Ending balance collectively evaluated for impairment	542,610				512,656				542,610	512,656	480,016
Home equity line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				1,211				1,078	1,211	1,078	730
Chargeoffs									0	153	69
Recoveries									61	22	4
Provision (credit)									(347)	264	413
Ending balance	925				1,211				925	1,211	1,078
Ending balance specifically evaluated for impairment	0				0				0	0	447
Ending balance collectively evaluated for impairment	925				1,211				925	1,211	631
Ending balance	73,632				79,750				73,632	79,750	92,349
Ending balance specifically evaluated for impairment	457				1,039				457	1,039	2,488
Ending balance collectively evaluated for impairment	73,175				78,711				73,175	78,711	89,861
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				778				867	778	867	630
Chargeoffs									312	327	338
Recoveries									85	132	128
Provision (credit)									282	106	447
Ending balance	833				778				833	778	867
Ending balance specifically evaluated for impairment	0				0				0	0	5
Ending balance collectively evaluated for impairment	833				778				833	778	862
Ending balance	22,976				25,857				22,976	25,857	26,503
Ending balance specifically evaluated for impairment	2				8				2	8	5
Ending balance collectively evaluated for impairment	22,974				25,849				22,974	25,849	26,498
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 2,134				$ 1,182	2,134	1,182	1,216
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									(352)	952	(34)
Ending balance	1,782				2,134				1,782	2,134	1,182
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	1,782				2,134				1,782	2,134	1,182
Ending balance	0				0				0	0	0
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	$ 0				$ 0				$ 0	$ 0	$ 0