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Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | $ 145,469 | $ 121,797
Financing Receivable, Nonaccrual, No Allowance | 102,380 | 90,854
Financing receivable, Nonaccrual, With Allowance | 43,089 | 30,943
Financing Receivable, Nonaccrual, Related Allowance | 2,692 | 5,570
Commercial [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 110,131 | 60,297
Financing Receivable, Nonaccrual, No Allowance | 67,042 | 45,531
Financing receivable, Nonaccrual, With Allowance | 43,089 | 14,766
Financing Receivable, Nonaccrual, Related Allowance | 2,692 | 4,020
Commercial [Member] | Healthcare [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 81,529 | 41,034
Financing Receivable, Nonaccrual, No Allowance | 40,372 | 34,661
Financing receivable, Nonaccrual, With Allowance | 41,157 | 6,373
Financing Receivable, Nonaccrual, Related Allowance | 1,478 | 946
Commercial [Member] | Energy [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 17,843 | 1,399
Financing Receivable, Nonaccrual, No Allowance | 17,843 | 1,399
Financing receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Commercial [Member] | Services [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 3,616 | 16,228
Financing Receivable, Nonaccrual, No Allowance | 1,684 | 7,835
Financing receivable, Nonaccrual, With Allowance | 1,932 | 8,393
Financing Receivable, Nonaccrual, Related Allowance | 1,214 | 3,074
Commercial [Member] | General business [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 7,143 | 1,636
Financing Receivable, Nonaccrual, No Allowance | 7,143 | 1,636
Financing receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Commercial real estate [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 7,320 | 16,570
Financing Receivable, Nonaccrual, No Allowance | 7,320 | 393
Financing receivable, Nonaccrual, With Allowance | 0 | 16,177
Financing Receivable, Nonaccrual, Related Allowance | 0 | 1,550
Loans to individuals [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 28,018 | 44,930
Financing Receivable, Nonaccrual, No Allowance | 28,018 | 44,930
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 | 18,056 | 29,791
Financing Receivable, Nonaccrual, No Allowance | 18,056 | 29,791
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 | 253 | 134
Financing Receivable, Nonaccrual, No Allowance | 253 | 134
Financing receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
US Government Agency Insured Loans | Loans to individuals [Member] | Residential mortgage [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 9,709 | 15,005
Financing Receivable, Nonaccrual, No Allowance | 9,709 | 15,005
Financing receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | $ 0 | $ 0

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