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Loans and Leases and Allowance for Loan and Lease Losses - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) loan property | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) property segment loan | Sep. 30, 2020 USD ($) loan | Dec. 31, 2020 USD ($) loan
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Loan portfolio segments | segment |  |  | 6 |  |
Number of contracts | loan |  |  | 0 | 1 |
Number of loans modified as troubled debt restructurings with subsequent default | loan |  |  | 0 |  |
Provision (recovery) charged to expense | $ 1,149,000 | $ 2,634,000 | $ 1,211,000 | $ 8,683,000 |
Allowance for loan losses | $ 19,295,000 |  | $ 19,295,000 |  | $ 18,346,000
Percentage of allowance for credit losses to aggregate loans | 0.73% |  | 0.73% |  | 0.77%
Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Number of properties in other real estate owned | property | 0 |  | 0 |  |
Provision (recovery) charged to expense | $ 205,000 | $ 135,000 | $ 96,000 | $ 857,000 |
Mortgage loans in process of foreclosure | 33,000 |  | 33,000 |  |
Trouble Debt Restructuring [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Troubled debt restructuring | $ 212,000 |  | $ 212,000 |  | $ 257,000
Number of contracts, nonaccrual | loan | 0 |  | 0 |  | 0
COVID-19 [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Number of contracts | loan |  |  | 0 |  |
Number of loans related to payroll protection program | loan | 1,126 |  | 1,126 |  | 2,863
Payroll Protection Program Loans Outstanding | $ 87,100,000 |  | $ 87,100,000 |  | $ 288,900,000
Financing Receivable Paycheck Protection Program Cares Act For 2020 Loans [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Payroll protection program loans net deferred fees receivable | 0 |  | 0 |  | $ 4,200,000
Financing Receivable Paycheck Protection Program Cares Act For 2021 Loans [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Payroll protection program loans net deferred fees receivable | $ 3,800,000 |  | $ 3,800,000 |  |

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