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Loans and Allowance for Credit Losses - Schedule of Loan Portfolio Summarized by Performing and Nonperforming (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 196,645
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	300,366
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	245,509
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	117,772
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	112,273
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	503,694
Financing Receivable, Revolving	139,707
Financing receivable, before allowance for credit loss	1,615,966	$ 1,538,610	$ 1,527,128
Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	196,645
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	300,366
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	245,509
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	117,772
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	111,952
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	500,705
Financing Receivable, Revolving	139,423
Financing receivable, before allowance for credit loss	1,612,372	1,534,753
Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	321
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,989
Financing Receivable, Revolving	284
Financing receivable, before allowance for credit loss	3,594	3,857
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,822
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,920
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	36,558
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	16,891
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,574
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	25,392
Financing Receivable, Revolving	29,870
Financing receivable, before allowance for credit loss	154,027	178,762	176,692
Commercial and industrial | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,822
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,920
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	36,558
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	16,891
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,574
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	25,206
Financing Receivable, Revolving	29,586
Financing receivable, before allowance for credit loss	153,557	177,981
Commercial and industrial | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	186
Financing Receivable, Revolving	284
Financing receivable, before allowance for credit loss	470	781
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	114,084
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	150,850
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	144,563
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	66,947
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	76,137
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	322,371
Financing Receivable, Revolving	17,413
Financing receivable, before allowance for credit loss	892,365	821,805	823,827
Commercial real estate | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	114,084
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	150,850
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	144,563
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	66,947
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	75,816
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	321,004
Financing Receivable, Revolving	17,413
Financing receivable, before allowance for credit loss	890,677	819,932
Commercial real estate | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	321
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,367
Financing Receivable, Revolving	0
Financing receivable, before allowance for credit loss	1,688	1,873
Commercial real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	19,757
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	46,857
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,392
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,020
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	338
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,423
Financing Receivable, Revolving	7,721
Financing receivable, before allowance for credit loss	86,508	80,470	66,189
Commercial real estate construction | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	19,757
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	46,857
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,392
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,020
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	338
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,423
Financing Receivable, Revolving	7,721
Financing receivable, before allowance for credit loss	86,508	80,470
Commercial real estate construction | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing receivable, before allowance for credit loss	0	0
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	54,695
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	73,839
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	57,124
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	32,319
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20,817
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	144,962
Financing Receivable, Revolving	548
Financing receivable, before allowance for credit loss	384,304	362,098	360,661
Residential mortgage | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	54,695
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	73,839
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	57,124
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	32,319
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20,817
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	143,962
Financing Receivable, Revolving	548
Financing receivable, before allowance for credit loss	383,304	361,393
Residential mortgage | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,000
Financing Receivable, Revolving	0
Financing receivable, before allowance for credit loss	1,000	705
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	953
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	39
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	97
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,298
Financing Receivable, Revolving	82,300
Financing receivable, before allowance for credit loss	88,687	84,141	87,555
Home equity lines of credit | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	953
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	39
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	97
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,888
Financing Receivable, Revolving	82,300
Financing receivable, before allowance for credit loss	88,277	83,643
Home equity lines of credit | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	410
Financing Receivable, Revolving	0
Financing receivable, before allowance for credit loss	410	498
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,334
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,861
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	872
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	595
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	310
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,248
Financing Receivable, Revolving	1,855
Financing receivable, before allowance for credit loss	10,075	11,334	$ 12,204
Consumer | Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,334
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,861
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	872
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	595
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	310
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,222
Financing Receivable, Revolving	1,855
Financing receivable, before allowance for credit loss	10,049	11,334
Consumer | Nonperforming Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	26
Financing Receivable, Revolving	0
Financing receivable, before allowance for credit loss	$ 26	$ 0

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