Loans - Aging Analysis of Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 3,509,809	$ 3,465,352
Accrued interest excluded from total	10,146	10,009
Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	4,772	5,983
Accrued interest excluded from total	26	34
Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,759	3,317
Accrued interest excluded from total	17	27
Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,508	928
Accrued interest excluded from total	9	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	1,505	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	3,505,037	3,459,369
Accrued interest excluded from total	10,120	9,975
Commercial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,471,293	1,466,853
Accrued interest excluded from total	4,587	4,409
Commercial | Commercial and industrial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	739,287	732,463
Accrued interest excluded from total	2,261	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	393	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	110	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	283	38
Commercial | Commercial and industrial | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	738,894	732,425
Commercial | Commercial real estate
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	732,006	734,390
Accrued interest excluded from total	2,326	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	732,006	734,390
Mortgage
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,408,229	1,368,409
Accrued interest excluded from total	4,094	4,116
Mortgage | 1-4 family owner occupied - jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	786,446	752,563
Accrued interest excluded from total	1,906	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	0	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	0	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	786,446	752,563
Mortgage | 1-4 family owner occupied - non-jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	294,983	285,632
Accrued interest excluded from total	883	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	1,853	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	328	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	1,081	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	444	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	293,130	282,842
Mortgage | 1-4 family non-owner occupied
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	180,863	183,100
Accrued interest excluded from total	552	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	385	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	82	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	124	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	179	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	180,478	182,746
Mortgage | 1-4 family - 2nd lien
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	106,022	105,277
Accrued interest excluded from total	622	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	573	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	399	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	59	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	115	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	105,449	104,703
Mortgage | Resort lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	39,915	41,837
Accrued interest excluded from total	131	125
Mortgage | Resort lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	107	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	107	148
Mortgage | Resort lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	39,808	41,635
Installment
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	630,287	630,090
Accrued interest excluded from total	1,465	1,484
Installment | Boat lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	257,244	252,965
Accrued interest excluded from total	597	601
Installment | Boat lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	520	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	303	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	0	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	217	295
Installment | Boat lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	256,724	252,128
Installment | Recreational vehicle lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	265,579	270,673
Accrued interest excluded from total	624	648
Installment | Recreational vehicle lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	523	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	353	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	94	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	76	18
Installment | Recreational vehicle lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	265,056	269,869
Installment | Other
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	107,464	106,452
Accrued interest excluded from total	244	235
Installment | Other | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	418	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	184	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	150	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	84	123
Installment | Other | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 107,046	$ 106,068