Loans - Aging Analysis of Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 3,741,486	$ 3,465,352
Accrued interest excluded from total	11,962	10,009
Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	8,613	5,983
Accrued interest excluded from total	63	34
Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	3,780	3,317
Accrued interest excluded from total	31	27
Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	2,345	928
Accrued interest excluded from total	32	7
Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	2,488	1,738
Accrued interest excluded from total	0	0
Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	3,732,873	3,459,369
Accrued interest excluded from total	11,899	9,975
Commercial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,626,122	1,466,853
Accrued interest excluded from total	5,461	4,409
Commercial | Commercial and industrial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	773,414	732,463
Accrued interest excluded from total	2,531	2,046
Commercial | Commercial and industrial | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	231	38
Commercial | Commercial and industrial | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	200	0
Commercial | Commercial and industrial | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Commercial | Commercial and industrial | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	31	38
Commercial | Commercial and industrial | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	773,183	732,425
Commercial | Commercial real estate
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	852,708	734,390
Accrued interest excluded from total	2,930	2,363
Commercial | Commercial real estate | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Commercial | Commercial real estate | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Commercial | Commercial real estate | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Commercial | Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Commercial | Commercial real estate | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	852,708	734,390
Mortgage
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,475,908	1,368,409
Accrued interest excluded from total	4,876	4,116
Mortgage | 1-4 family owner occupied - jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	841,146	752,563
Accrued interest excluded from total	2,274	1,892
Mortgage | 1-4 family owner occupied - jumbo | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	544	0
Mortgage | 1-4 family owner occupied - jumbo | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Mortgage | 1-4 family owner occupied - jumbo | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	544	0
Mortgage | 1-4 family owner occupied - jumbo | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Mortgage | 1-4 family owner occupied - jumbo | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	840,602	752,563
Mortgage | 1-4 family owner occupied - non-jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	303,756	285,632
Accrued interest excluded from total	1,058	953
Mortgage | 1-4 family owner occupied - non-jumbo | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	4,368	2,790
Mortgage | 1-4 family owner occupied - non-jumbo | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,948	1,400
Mortgage | 1-4 family owner occupied - non-jumbo | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,244	521
Mortgage | 1-4 family owner occupied - non-jumbo | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,176	869
Mortgage | 1-4 family owner occupied - non-jumbo | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	299,388	282,842
Mortgage | 1-4 family non-owner occupied
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	180,678	183,100
Accrued interest excluded from total	626	558
Mortgage | 1-4 family non-owner occupied | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	187	354
Mortgage | 1-4 family non-owner occupied | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	17	61
Mortgage | 1-4 family non-owner occupied | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	12	93
Mortgage | 1-4 family non-owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	158	200
Mortgage | 1-4 family non-owner occupied | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	180,491	182,746
Mortgage | 1-4 family - 2nd lien
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	113,486	105,277
Accrued interest excluded from total	773	588
Mortgage | 1-4 family - 2nd lien | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	611	574
Mortgage | 1-4 family - 2nd lien | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	132	420
Mortgage | 1-4 family - 2nd lien | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	125	107
Mortgage | 1-4 family - 2nd lien | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	354	47
Mortgage | 1-4 family - 2nd lien | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	112,875	104,703
Mortgage | Resort lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	36,842	41,837
Accrued interest excluded from total	145	125
Mortgage | Resort lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	271	202
Mortgage | Resort lending | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	54
Mortgage | Resort lending | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	0	0
Mortgage | Resort lending | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	271	148
Mortgage | Resort lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	36,571	41,635
Installment
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	639,456	630,090
Accrued interest excluded from total	1,625	1,484
Installment | Boat lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	274,184	252,965
Accrued interest excluded from total	700	601
Installment | Boat lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,026	837
Installment | Boat lending | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	688	528
Installment | Boat lending | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	131	14
Installment | Boat lending | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	207	295
Installment | Boat lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	273,158	252,128
Installment | Recreational vehicle lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	259,545	270,673
Accrued interest excluded from total	653	648
Installment | Recreational vehicle lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	936	804
Installment | Recreational vehicle lending | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	520	639
Installment | Recreational vehicle lending | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	213	147
Installment | Recreational vehicle lending | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	203	18
Installment | Recreational vehicle lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	258,609	269,869
Installment | Other
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	105,727	106,452
Accrued interest excluded from total	272	235
Installment | Other | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	439	384
Installment | Other | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	275	215
Installment | Other | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	76	46
Installment | Other | Financial Asset, Equal to or Greater than 90 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	88	123
Installment | Other | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 105,288	$ 106,068