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Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | $ 90,683 | $ 145,469
Financing Receivable, Nonaccrual, No Allowance | 78,986 | 102,380
Financing Receivable, Nonaccrual, With Allowance | 11,697 | 43,089
Financing Receivable, Nonaccrual, Related Allowance | 2,214 | 2,692
Commercial [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 58,434 | 110,131
Financing Receivable, Nonaccrual, No Allowance | 46,737 | 67,042
Financing Receivable, Nonaccrual, With Allowance | 11,697 | 43,089
Financing Receivable, Nonaccrual, Related Allowance | 2,214 | 2,692
Commercial [Member] | Healthcare [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 20,845 | 81,529
Financing Receivable, Nonaccrual, No Allowance | 10,930 | 40,372
Financing Receivable, Nonaccrual, With Allowance | 9,915 | 41,157
Financing Receivable, Nonaccrual, Related Allowance | 1,700 | 1,478
Commercial [Member] | Services [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 3,165 | 3,616
Financing Receivable, Nonaccrual, No Allowance | 1,521 | 1,684
Financing Receivable, Nonaccrual, With Allowance | 1,644 | 1,932
Financing Receivable, Nonaccrual, Related Allowance | 441 | 1,214
Commercial [Member] | Energy [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 28,668 | 17,843
Financing Receivable, Nonaccrual, No Allowance | 28,668 | 17,843
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Commercial [Member] | General business [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 5,756 | 7,143
Financing Receivable, Nonaccrual, No Allowance | 5,618 | 7,143
Financing Receivable, Nonaccrual, With Allowance | 138 | 0
Financing Receivable, Nonaccrual, Related Allowance | 73 | 0
Commercial real estate [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 12,883 | 7,320
Financing Receivable, Nonaccrual, No Allowance | 12,883 | 7,320
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Loans to individuals [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 19,366 | 28,018
Financing Receivable, Nonaccrual, No Allowance | 19,366 | 28,018
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Loans to individuals [Member] | Residential mortgage [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 12,627 | 18,056
Financing Receivable, Nonaccrual, No Allowance | 12,627 | 18,056
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Loans to individuals [Member] | Personal [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 122 | 253
Financing Receivable, Nonaccrual, No Allowance | 122 | 253
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
US Government Agency Insured Loans [Member] | Loans to individuals [Member] | Residential mortgage [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 6,617 | 9,709
Financing Receivable, Nonaccrual, No Allowance | 6,617 | 9,709
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | $ 0 | $ 0

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