Loans and Allowance for Credit Losses on Loans - Schedule of Loans Outstanding and Aging Analysis (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 2,090,354,000		$ 2,090,354,000		$ 2,083,256,000
Number of loans 90 days past due and still accruing \| loan	0		0		0
Financing receivable, nonaccrual, earning interest on cash basis	$ 0		$ 0		$ 0
Nonaccrual interest income reversal	5,000	$ 257,000	49,000	$ 523,000
Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,090,354,000		2,090,354,000		2,083,256,000
Non-accrual loans	31,489,000		31,489,000		33,881,000
Non-accrual loans with no allowance	11,057,000		11,057,000		2,993,000
Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	23,504,000		23,504,000		16,938,000
30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,483,000		10,483,000		2,282,000
60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	633,000		633,000		752,000
90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	12,388,000		12,388,000		13,904,000
Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,066,850,000		2,066,850,000		2,066,318,000
Commercial Portfolio Segment \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	154,303,000		154,303,000		152,263,000
Commercial Portfolio Segment \| Commercial and industrial \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	154,303,000		154,303,000		152,263,000
Non-accrual loans	3,488,000		3,488,000		2,845,000
Non-accrual loans with no allowance	0		0		0
Commercial Portfolio Segment \| Commercial and industrial \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,786,000		3,786,000		2,996,000
Commercial Portfolio Segment \| Commercial and industrial \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	248,000		248,000		203,000
Commercial Portfolio Segment \| Commercial and industrial \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	50,000		50,000		0
Commercial Portfolio Segment \| Commercial and industrial \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,488,000		3,488,000		2,793,000
Commercial Portfolio Segment \| Commercial and industrial \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	150,517,000		150,517,000		149,267,000
Commercial real estate loans \| Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313,996,000		313,996,000		321,962,000
Commercial real estate loans \| Commercial owner-occupied \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313,996,000		313,996,000		321,962,000
Non-accrual loans	1,488,000		1,488,000		1,537,000
Non-accrual loans with no allowance	1,488,000		1,488,000		1,537,000
Commercial real estate loans \| Commercial owner-occupied \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	375,000		375,000		880,000
Commercial real estate loans \| Commercial owner-occupied \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		208,000
Commercial real estate loans \| Commercial owner-occupied \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		559,000
Commercial real estate loans \| Commercial owner-occupied \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	375,000		375,000		113,000
Commercial real estate loans \| Commercial owner-occupied \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313,621,000		313,621,000		321,082,000
Commercial real estate loans \| Commercial non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,324,263,000		1,324,263,000		1,273,596,000
Commercial real estate loans \| Commercial non-owner occupied \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,324,263,000		1,324,263,000		1,273,596,000
Non-accrual loans	25,701,000		25,701,000		28,525,000
Non-accrual loans with no allowance	8,831,000		8,831,000		497,000
Commercial real estate loans \| Commercial non-owner occupied \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	18,111,000		18,111,000		11,460,000
Commercial real estate loans \| Commercial non-owner occupied \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,556,000		9,556,000		718,000
Commercial real estate loans \| Commercial non-owner occupied \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	437,000		437,000		0
Commercial real estate loans \| Commercial non-owner occupied \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,118,000		8,118,000		10,742,000
Commercial real estate loans \| Commercial non-owner occupied \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,306,152,000		1,306,152,000		1,262,136,000
Commercial real estate loans \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,869,000		15,869,000		36,970,000
Commercial real estate loans \| Construction \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,869,000		15,869,000		36,970,000
Non-accrual loans	0		0		0
Non-accrual loans with no allowance	0		0		0
Commercial real estate loans \| Construction \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Commercial real estate loans \| Construction \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Commercial real estate loans \| Construction \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Commercial real estate loans \| Construction \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Commercial real estate loans \| Construction \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,869,000		15,869,000		36,970,000
Residential Portfolio Segment \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	95,872,000		95,872,000		88,325,000
Residential Portfolio Segment \| Home equity \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	95,872,000		95,872,000		88,325,000
Non-accrual loans	553,000		553,000		752,000
Non-accrual loans with no allowance	553,000		553,000		752,000
Residential Portfolio Segment \| Home equity \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	555,000		555,000		1,172,000
Residential Portfolio Segment \| Home equity \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	407,000		407,000		738,000
Residential Portfolio Segment \| Home equity \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		186,000
Residential Portfolio Segment \| Home equity \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	148,000		148,000		248,000
Residential Portfolio Segment \| Home equity \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	95,317,000		95,317,000		87,153,000
Residential Portfolio Segment \| Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	122,924,000		122,924,000		143,207,000
Residential Portfolio Segment \| Other residential \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	122,924,000		122,924,000		143,207,000
Non-accrual loans	74,000		74,000		0
Non-accrual loans with no allowance	0		0		0
Residential Portfolio Segment \| Other residential \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	74,000		74,000		0
Residential Portfolio Segment \| Other residential \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Residential Portfolio Segment \| Other residential \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Residential Portfolio Segment \| Other residential \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	74,000		74,000		0
Residential Portfolio Segment \| Other residential \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	122,850,000		122,850,000		143,207,000
Installment and other consumer loans \| Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	63,127,000		63,127,000		66,933,000
Installment and other consumer loans \| Installment and other consumer loans \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	63,127,000		63,127,000		66,933,000
Non-accrual loans	185,000		185,000		222,000
Non-accrual loans with no allowance	185,000		185,000		207,000
Installment and other consumer loans \| Installment and other consumer loans \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	603,000		603,000		430,000
Installment and other consumer loans \| Installment and other consumer loans \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	272,000		272,000		415,000
Installment and other consumer loans \| Installment and other consumer loans \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	146,000		146,000		7,000
Installment and other consumer loans \| Installment and other consumer loans \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	185,000		185,000		8,000
Installment and other consumer loans \| Installment and other consumer loans \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 62,524,000		$ 62,524,000		$ 66,503,000