Allowance for Loan and Lease Losses - Collateral Dependent Loans (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	$ 10,094
ACL Allocation	356
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	9,310
Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	631
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	153
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	724
ACL Allocation	131
Commercial and Industrial | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Commercial and Industrial | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	631
Commercial and Industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	93
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	7,765
ACL Allocation	225
Commercial Real Estate | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	7,705
Commercial Real Estate | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Commercial Real Estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	60
Commercial Real Estate - Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	1,559
ACL Allocation	0
Commercial Real Estate - Agriculture | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	1,559
Commercial Real Estate - Agriculture | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Commercial Real Estate - Agriculture | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Residential - Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	46
ACL Allocation	0
Residential - Mortgages | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	46
Residential - Mortgages | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Residential - Mortgages | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	$ 0