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Allowance for Loan Losses - Activity by Class (Details) - USD ($) $ 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
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 15,521				$ 16,253	$ 15,521	$ 16,253	$ 11,639
Chargeoffs									758	748	1,661
Recoveries									210	391	225
Provision (credit) for loan losses	$ 450	$ 400	$ 450	450	$ (1,950)	$ 525	$ 525	525	1,750	(375)	6,050
Ending balance	16,723				15,521				16,723	15,521	16,253
Ending balance specifically evaluated for impairment	398				576				398	576	462
Ending balance collectively evaluated for impairment	16,325				14,945				16,325	14,945	15,791
Ending balance	1,914,674				1,647,649				1,914,674	1,647,649	1,476,761
Ending balance specifically evaluated for impairment	6,160				12,052				6,160	12,052	16,039
Ending balance collectively evaluated for impairment	1,908,514				1,635,597				1,908,514	1,635,597	1,460,722
Commercial | Real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				5,367				5,178	5,367	5,178	3,742
Chargeoffs									0	106	1,088
Recoveries									20	95	0
Provision (credit) for loan losses									729	200	2,524
Ending balance	6,116				5,367				6,116	5,367	5,178
Ending balance specifically evaluated for impairment	0				42				0	42	112
Ending balance collectively evaluated for impairment	6,116				5,325				6,116	5,325	5,066
Ending balance	699,340				576,198				699,340	576,198	442,121
Ending balance specifically evaluated for impairment	1,236				1,428				1,236	1,428	3,029
Ending balance collectively evaluated for impairment	698,104				574,770				698,104	574,770	439,092
Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				746				662	746	662	365
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit) for loan losses									75	84	297
Ending balance	821				746				821	746	662
Ending balance specifically evaluated for impairment	0				16				0	16	18
Ending balance collectively evaluated for impairment	821				730				821	730	644
Ending balance	93,907				79,365				93,907	79,365	56,565
Ending balance specifically evaluated for impairment	685				689				685	689	770
Ending balance collectively evaluated for impairment	93,222				78,676				93,222	78,676	55,795
Commercial | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,830				3,438	2,830	3,438	3,329
Chargeoffs									309	288	27
Recoveries									13	84	37
Provision (credit) for loan losses									563	(404)	99
Ending balance	3,097				2,830				3,097	2,830	3,438
Ending balance specifically evaluated for impairment	298				381				298	381	169
Ending balance collectively evaluated for impairment	2,799				2,449				2,799	2,449	3,269
Ending balance	319,359				264,570				319,359	264,570	285,015
Ending balance specifically evaluated for impairment	846				1,303				846	1,303	1,779
Ending balance collectively evaluated for impairment	318,513				263,267				318,513	263,267	283,236
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				157				171	157	171	27
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit) for loan losses									5	(14)	144
Ending balance	162				157				162	157	171
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	162				157				162	157	171
Ending balance	40,619				48,362				40,619	48,362	43,783
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	40,619				48,362				40,619	48,362	43,783
Residential | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				148				102	148	102	25
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit) for loan losses									51	46	77
Ending balance	199				148				199	148	102
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	199				148				199	148	102
Ending balance	49,907				31,763				49,907	31,763	21,600
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	49,907				31,763				49,907	31,763	21,600
Residential | Term
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,733				2,579	2,733	2,579	1,024
Chargeoffs									8	42	66
Recoveries									29	66	34
Provision (credit) for loan losses									(195)	130	1,587
Ending balance	2,559				2,733				2,559	2,733	2,579
Ending balance specifically evaluated for impairment	100				137				100	137	163
Ending balance collectively evaluated for impairment	2,459				2,596				2,459	2,596	2,416
Ending balance	613,919				550,783				613,919	550,783	522,070
Ending balance specifically evaluated for impairment	3,089				8,173				3,089	8,173	9,414
Ending balance collectively evaluated for impairment	610,830				542,610				610,830	542,610	512,656
Home equity line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				925				1,211	925	1,211	1,078
Chargeoffs									29	0	153
Recoveries									4	61	22
Provision (credit) for loan losses									129	(347)	264
Ending balance	1,029				925				1,029	925	1,211
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	1,029				925				1,029	925	1,211
Ending balance	76,560				73,632				76,560	73,632	79,750
Ending balance specifically evaluated for impairment	304				457				304	457	1,039
Ending balance collectively evaluated for impairment	76,256				73,175				76,256	73,175	78,711
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				833				778	833	778	867
Chargeoffs									412	312	327
Recoveries									144	85	132
Provision (credit) for loan losses									497	282	106
Ending balance	1,062				833				1,062	833	778
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	1,062				833				1,062	833	778
Ending balance	21,063				22,976				21,063	22,976	25,857
Ending balance specifically evaluated for impairment	0				2				0	2	8
Ending balance collectively evaluated for impairment	21,063				22,974				21,063	22,974	25,849
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 1,782				$ 2,134	1,782	2,134	1,182
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit) for loan losses									(104)	(352)	952
Ending balance	1,678				1,782				1,678	1,782	2,134
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	1,678				1,782				1,678	1,782	2,134
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

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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