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Loans (Narrative) (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) contract | Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans | $ 3,521,925 | $ 3,622,119
Commercial and industrial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans | 353,046 | $ 372,989
Small Business Administration Paycheck Protection Program | Commercial and industrial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans | $ 136,000 |
Financing receivable, number of contracts | contract | 2,500 |
Small business administration paycheck protection program forgiveness proceeds | $ 110,000 |

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