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Loans - Nonaccrual Loans and Loans Past Due over 90 Days Still Accruing Interest by Class of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | $ 31,854 | $ 21,736
Past Due Over 90 Days Still on Accrual | 33 | 61
Commercial, industrial and agricultural |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 12,144 | 11,644
Past Due Over 90 Days Still on Accrual | 16 | 0
Commercial mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 14,237 | 4,533
Past Due Over 90 Days Still on Accrual | 0 | 0
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 4,663 | 4,724
Past Due Over 90 Days Still on Accrual | 0 | 59
Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 810 | 835
Past Due Over 90 Days Still on Accrual | 0 | 0
Credit Cards |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 0 | 0
Past Due Over 90 Days Still on Accrual | $ 17 | $ 2

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