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Loans Loans - Revolving Loans Converted to Term (Details) - Revolving Loans Converted to Term [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | $ 14,556 | $ 45,728
Commercial Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | 5,763 | 11,843
Commercial and Industrial Total Energy Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | 0 | 5,928
Commercial Real Estate Buildings Land And Other Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | 47 | 23,303
Construction Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | 3,666 | 0
Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | 858 | 793
Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Remaining Revolving Loans Converted to Term During Period | $ 4,222 | $ 3,861

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