Loans and Allowance for Credit Losses on Loans - Schedule of Loans Outstanding and Aging Analysis (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($) loan	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) loan	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	$ 2,073,638,000		$ 2,073,638,000		$ 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	11,000	$ 256,000	44,000	$ 266,000
Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,073,638,000		2,073,638,000		2,083,256,000
Non-accrual loans	32,472,000		32,472,000		33,881,000
Non-accrual loans with no allowance	12,426,000		12,426,000		2,993,000
Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	15,472,000		15,472,000		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]
Loans, at amortized cost	3,014,000		3,014,000		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]
Loans, at amortized cost	226,000		226,000		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]
Loans, at amortized cost	12,232,000		12,232,000		13,904,000
Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,058,166,000		2,058,166,000		2,066,318,000
Commercial Portfolio Segment \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	154,576,000		154,576,000		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]
Loans, at amortized cost	154,576,000		154,576,000		152,263,000
Non-accrual loans	2,793,000		2,793,000		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]
Loans, at amortized cost	3,489,000		3,489,000		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]
Loans, at amortized cost	695,000		695,000		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]
Loans, at amortized cost	1,000		1,000		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]
Loans, at amortized cost	2,793,000		2,793,000		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]
Loans, at amortized cost	151,087,000		151,087,000		149,267,000
Commercial real estate loans \| Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	320,439,000		320,439,000		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]
Loans, at amortized cost	320,439,000		320,439,000		321,962,000
Non-accrual loans	1,554,000		1,554,000		1,537,000
Non-accrual loans with no allowance	1,554,000		1,554,000		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]
Loans, at amortized cost	1,364,000		1,364,000		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]
Loans, at amortized cost	1,008,000		1,008,000		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]
Loans, at amortized cost	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]
Loans, at amortized cost	356,000		356,000		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]
Loans, at amortized cost	319,075,000		319,075,000		321,082,000
Commercial real estate loans \| Commercial non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,285,803,000		1,285,803,000		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]
Loans, at amortized cost	1,285,803,000		1,285,803,000		1,273,596,000
Non-accrual loans	26,012,000		26,012,000		28,525,000
Non-accrual loans with no allowance	8,835,000		8,835,000		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]
Loans, at amortized cost	8,118,000		8,118,000		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]
Loans, at amortized cost	0		0		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]
Loans, at amortized cost	0		0		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]
Loans, at amortized cost	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]
Loans, at amortized cost	1,277,685,000		1,277,685,000		1,262,136,000
Commercial real estate loans \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	25,018,000		25,018,000		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]
Loans, at amortized cost	25,018,000		25,018,000		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]
Loans, at amortized cost	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]
Loans, at amortized cost	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]
Loans, at amortized cost	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]
Loans, at amortized cost	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]
Loans, at amortized cost	25,018,000		25,018,000		36,970,000
Home Equity \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	95,241,000		95,241,000		88,325,000
Home Equity \| Home equity \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	95,241,000		95,241,000		88,325,000
Non-accrual loans	1,456,000		1,456,000		752,000
Non-accrual loans with no allowance	1,456,000		1,456,000		752,000
Home Equity \| Home equity \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,884,000		1,884,000		1,172,000
Home Equity \| 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]
Loans, at amortized cost	986,000		986,000		738,000
Home Equity \| 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]
Loans, at amortized cost	149,000		149,000		186,000
Home Equity \| 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]
Loans, at amortized cost	749,000		749,000		248,000
Home Equity \| Home equity \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	93,357,000		93,357,000		87,153,000
Home Equity \| Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	127,947,000		127,947,000		143,207,000
Home Equity \| Other residential \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	127,947,000		127,947,000		143,207,000
Non-accrual loans	282,000		282,000		0
Non-accrual loans with no allowance	206,000		206,000		0
Home Equity \| Other residential \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	282,000		282,000		0
Home Equity \| 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]
Loans, at amortized cost	0		0		0
Home Equity \| 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]
Loans, at amortized cost	76,000		76,000		0
Home Equity \| 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]
Loans, at amortized cost	206,000		206,000		0
Home Equity \| Other residential \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	127,665,000		127,665,000		143,207,000
Installment and other consumer loans \| Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	64,614,000		64,614,000		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]
Loans, at amortized cost	64,614,000		64,614,000		66,933,000
Non-accrual loans	375,000		375,000		222,000
Non-accrual loans with no allowance	375,000		375,000		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]
Loans, at amortized cost	335,000		335,000		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]
Loans, at amortized cost	325,000		325,000		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]
Loans, at amortized cost	0		0		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]
Loans, at amortized cost	10,000		10,000		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]
Loans, at amortized cost	$ 64,279,000		$ 64,279,000		$ 66,503,000