Loans - Aging Analysis of Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 3,942,287	$ 3,790,901
Accrued interest excluded from total	13,336	12,500
Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	10,205	7,512
Accrued interest excluded from total	73	48
Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	3,812	3,266
Accrued interest excluded from total	40	31
Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	2,952	1,132
Accrued interest excluded from total	33	17
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	3,441	3,114
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	3,932,082	3,783,389
Accrued interest excluded from total	13,263	12,452
Commercial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,825,247	1,679,731
Accrued interest excluded from total	6,298	5,743
Commercial | Commercial and industrial
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	954,752	810,145
Accrued interest excluded from total	3,441	2,710
Commercial | Commercial and industrial | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	103	28
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	44	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	59	28
Commercial | Commercial and industrial | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	954,649	810,117
Commercial | Commercial real estate
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	870,495	869,586
Accrued interest excluded from total	2,857	3,033
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	870,495	869,586
Mortgage
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,511,400	1,485,872
Accrued interest excluded from total	5,374	5,097
Mortgage | 1-4 family owner occupied - jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	871,867	859,236
Accrued interest excluded from total	2,436	2,375
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	1,480	544
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	718	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	762	544
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	870,387	858,692
Mortgage | 1-4 family owner occupied - non-jumbo
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	305,494	301,172
Accrued interest excluded from total	1,209	1,111
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	5,364	3,936
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	1,506	1,763
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	2,074	742
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	1,784	1,431
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	300,130	297,236
Mortgage | 1-4 family non-owner occupied
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	172,694	173,816
Accrued interest excluded from total	658	654
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	161	437
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	74	215
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	0	64
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	87	158
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	172,533	173,379
Mortgage | 1-4 family - 2nd lien
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	129,203	116,032
Accrued interest excluded from total	903	804
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	997	595
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	281	241
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	529	139
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	187	215
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	128,206	115,437
Mortgage | Resort lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	32,142	35,616
Accrued interest excluded from total	168	153
Mortgage | Resort lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	184	193
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	41	0
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	50
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	143	143
Mortgage | Resort lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	31,958	35,423
Installment
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	605,640	625,298
Accrued interest excluded from total	1,664	1,660
Installment | Boat lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	271,646	268,648
Accrued interest excluded from total	764	714
Installment | Boat lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	413	597
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	215	320
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	109	16
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	89	261
Installment | Boat lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	271,233	268,051
Installment | Recreational vehicle lending
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	233,067	251,852
Accrued interest excluded from total	611	655
Installment | Recreational vehicle lending | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	1,080	729
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	688	414
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	121	35
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	271	280
Installment | Recreational vehicle lending | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	231,987	251,123
Installment | Other
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	100,927	104,798
Accrued interest excluded from total	289	291
Installment | Other | Financial asset, past due, total
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	423	453
Installment | Other | Financial Asset, 30 to 59 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	245	313
Installment | Other | Financial Asset, 60 to 89 Days Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	119	86
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	59	54
Installment | Other | Financial Asset, Not Past Due
Aging analysis of loans by class [Abstract]
Financing receivable, before allowance for credit loss	$ 100,504	$ 104,345