Loans, Amortized Cost of Collateral-dependent Loans by Class (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Collateral-dependent Loans by Class [Abstract]
Total loans	$ 2,784,224
Allowance for credit losses	46,755	[1]
Accrued interest excluded from total	8,496
Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	1,497
Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	4,191
Accrued interest excluded from total	1
Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	1,380
Accrued interest excluded from total	6
Commercial [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	1,301,223
Allowance for credit losses	9,530
Accrued interest excluded from total	3,438
Commercial [Member] | Commercial and Industrial [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	729,168
Accrued interest excluded from total	2,342
Commercial [Member] | Commercial and Industrial [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	681
Commercial [Member] | Commercial and Industrial [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	840
Commercial [Member] | Commercial and Industrial [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	1,209
Commercial [Member] | Commercial Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	572,055
Accrued interest excluded from total	1,096
Commercial [Member] | Commercial Real Estate [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	32
Commercial [Member] | Commercial Real Estate [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	142
Commercial [Member] | Commercial Real Estate [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Mortgage [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	999,982	[2]
Allowance for credit losses	18,448
Accrued interest excluded from total	3,860	[2]
Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	447,865	[2]
Accrued interest excluded from total	1,125	[2]
Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	0
Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	619
Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	251,498	[2]
Accrued interest excluded from total	1,686	[2]
Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	316
Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	886
Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	157,993	[2]
Accrued interest excluded from total	512	[2]
Mortgage [Member] | 1-4 Family Non-owner Occupied [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	169
Mortgage [Member] | 1-4 Family Non-owner Occupied [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	694
Mortgage [Member] | 1-4 Family Non-owner Occupied [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Mortgage [Member] | 1-4 Family - 2nd Lien [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	86,940	[2]
Accrued interest excluded from total	298	[2]
Mortgage [Member] | 1-4 Family - 2nd Lien [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	163
Mortgage [Member] | 1-4 Family - 2nd Lien [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	646
Mortgage [Member] | 1-4 Family - 2nd Lien [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Mortgage [Member] | Resort Lending [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	55,686	[2]
Accrued interest excluded from total	239	[2]
Mortgage [Member] | Resort Lending [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	48
Mortgage [Member] | Resort Lending [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	287
Mortgage [Member] | Resort Lending [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Installment [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	483,019	[2]
Allowance for credit losses	3,979
Accrued interest excluded from total	1,198	[2]
Installment [Member] | Boat Lending [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	211,328	[2]
Accrued interest excluded from total	481	[2]
Installment [Member] | Boat Lending [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	4
Installment [Member] | Boat Lending [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Installment [Member] | Boat Lending [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	11
Installment [Member] | Recreational Vehicle Lending [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	173,273	[2]
Accrued interest excluded from total	393	[2]
Installment [Member] | Recreational Vehicle Lending [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	6
Installment [Member] | Recreational Vehicle Lending [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	0
Installment [Member] | Recreational Vehicle Lending [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	17
Installment [Member] | Other [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	98,418	[2]
Accrued interest excluded from total	324	[2]
Installment [Member] | Other [Member] | Collateral Dependent Loans [Member]
Collateral-dependent Loans by Class [Abstract]
Allowance for credit losses	78
Installment [Member] | Other [Member] | Real Estate [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	77
Installment [Member] | Other [Member] | Other Loan [Member]
Collateral-dependent Loans by Class [Abstract]
Total loans	$ 143

[1] Beginning January 1, 2021, calculation is based on CECL methodology. Prior to January 1, 2021, calculation was based on the probable incurred loss methodology.

[2] Credit scores have been updated within the last twelve months.