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Loans and Allowance for Credit Losses on Loans - Schedule of Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	$ 2,086,942		$ 2,092,546
Allowance for credit losses on loans	(24,260)	$ (23,832)	(22,983)	$ (22,963)	$ (22,539)	$ (23,023)
Total loans, net of allowance for credit losses on loans	2,062,682		2,069,563
Net deferred loan origination costs	2,600		1,800
Unrecognized purchase discounts on non-PCI loans	2,200		2,600
Financing receivable, accrued interest, net	6,300		6,100
Commercial loans | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	174,096		173,547
Allowance for credit losses on loans	(1,808)	(1,831)	(1,794)	(1,958)	(1,699)	(1,709)
Commercial real estate loans | Commercial owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	346,307		354,877
Allowance for credit losses on loans	(2,530)	(2,589)	(2,487)	(2,536)	(2,617)	(2,776)
Commercial real estate loans | Commercial non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	1,190,813		1,191,889
Allowance for credit losses on loans	(13,624)	(13,201)	(12,676)	(12,738)	(12,439)
Commercial real estate loans | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	109,305		114,373
Allowance for credit losses on loans	(2,018)	(1,942)	(1,937)	(1,784)	(1,737)	(1,653)
Residential loans | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	83,267		88,748
Allowance for credit losses on loans	(565)	(561)	(558)	(542)	(530)	(595)
Residential loans | Other residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	116,674		112,123
Allowance for credit losses on loans	(605)	(599)	(595)	(590)	(585)	(644)
Consumer loans | Installment and other consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	66,480		56,989
Allowance for credit losses on loans	$ (951)	$ (940)	$ (868)	$ (815)	$ (733)	$ (621)

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