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Loans and Leases - Nonaccrual Loans (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | $ 26,945,000 |  | $ 26,945,000 |  | $ 26,018,000
Nonaccrual Loans and Leases | 47,941,000 |  | 47,941,000 |  | 38,976,000
Loans and Leases Past Due Over 89 Days and Accruing | 7,463,000 |  | 7,463,000 |  | 0
Interest on nonaccrual loans | 0 | $ 0 | 0 | $ 0 |
Commercial and industrial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 480,000 |  | 480,000 |  | 803,000
Nonaccrual Loans and Leases | 543,000 |  | 543,000 |  | 1,775,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Commercial and industrial | Commercial real estate other |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 480,000 |  | 480,000 |  | 803,000
Nonaccrual Loans and Leases | 543,000 |  | 543,000 |  | 1,775,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 25,570,000 |  | 25,570,000 |  | 23,080,000
Nonaccrual Loans and Leases | 35,022,000 |  | 35,022,000 |  | 23,627,000
Loans and Leases Past Due Over 89 Days and Accruing | 7,463,000 |  | 7,463,000 |  | 0
Commercial real estate | Agriculture |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 377,000 |  | 377,000 |  | 0
Nonaccrual Loans and Leases | 487,000 |  | 487,000 |  | 118,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Commercial real estate | Commercial real estate other |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 24,518,000 |  | 24,518,000 |  | 23,080,000
Nonaccrual Loans and Leases | 33,860,000 |  | 33,860,000 |  | 23,509,000
Loans and Leases Past Due Over 89 Days and Accruing | 7,463,000 |  | 7,463,000 |  | 0
Residential real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 893,000 |  | 893,000 |  | 2,132,000
Nonaccrual Loans and Leases | 11,965,000 |  | 11,965,000 |  | 13,145,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Residential real estate | Home equity |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 188,000 |  | 188,000 |  | 767,000
Nonaccrual Loans and Leases | 2,427,000 |  | 2,427,000 |  | 2,965,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Residential real estate | Mortgages |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 705,000 |  | 705,000 |  | 1,365,000
Nonaccrual Loans and Leases | 9,538,000 |  | 9,538,000 |  | 10,180,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Consumer and other |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 2,000 |  | 2,000 |  | 3,000
Nonaccrual Loans and Leases | 411,000 |  | 411,000 |  | 429,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Consumer and other | Commercial real estate other |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 0 |  | 0 |  | 0
Nonaccrual Loans and Leases | 146,000 |  | 146,000 |  | 260,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Consumer and other | Indirect |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 2,000 |  | 2,000 |  | 3,000
Nonaccrual Loans and Leases | 265,000 |  | 265,000 |  | 169,000
Loans and Leases Past Due Over 89 Days and Accruing | 0 |  | 0 |  | 0
Leases |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Nonaccrual Loans and Leases with no Allowance for Credit Losses | 0 |  | 0 |  | 0
Nonaccrual Loans and Leases | 0 |  | 0 |  | 0
Loans and Leases Past Due Over 89 Days and Accruing | $ 0 |  | $ 0 |  | $ 0

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