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Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | $ 121,797 | $ 134,059
Financing Receivable, Nonaccrual, No Allowance | 90,854 | 114,025
Financing receivable, Nonaccrual, With Allowance | 30,943 | 20,034
Financing Receivable, Nonaccrual, Related Allowance | 5,570 | 6,343
Commercial [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 60,297 | 74,104
Financing Receivable, Nonaccrual, No Allowance | 45,531 | 62,146
Financing receivable, Nonaccrual, With Allowance | 14,766 | 11,958
Financing Receivable, Nonaccrual, Related Allowance | 4,020 | 3,994
Commercial [Member] | Healthcare [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 41,034 | 15,762
Financing Receivable, Nonaccrual, No Allowance | 34,661 | 9,679
Financing receivable, Nonaccrual, With Allowance | 6,373 | 6,083
Financing Receivable, Nonaccrual, Related Allowance | 946 | 53
Commercial [Member] | Services [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 16,228 | 17,170
Financing Receivable, Nonaccrual, No Allowance | 7,835 | 13,686
Financing receivable, Nonaccrual, With Allowance | 8,393 | 3,484
Financing Receivable, Nonaccrual, Related Allowance | 3,074 | 2,584
Commercial [Member] | Energy [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 1,399 | 31,091
Financing Receivable, Nonaccrual, No Allowance | 1,399 | 31,091
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 | 1,636 | 10,081
Financing Receivable, Nonaccrual, No Allowance | 1,636 | 7,690
Financing receivable, Nonaccrual, With Allowance | 0 | 2,391
Financing Receivable, Nonaccrual, Related Allowance | 0 | 1,357
Commercial real estate [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 16,570 | 14,262
Financing Receivable, Nonaccrual, No Allowance | 393 | 6,186
Financing receivable, Nonaccrual, With Allowance | 16,177 | 8,076
Financing Receivable, Nonaccrual, Related Allowance | 1,550 | 2,349
Loans to individuals [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 44,930 | 45,693
Financing Receivable, Nonaccrual, No Allowance | 44,930 | 45,693
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 | 29,791 | 31,574
Financing Receivable, Nonaccrual, No Allowance | 29,791 | 31,574
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 | 134 | 258
Financing Receivable, Nonaccrual, No Allowance | 134 | 258
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 | 15,005 | 13,861
Financing Receivable, Nonaccrual, No Allowance | 15,005 | 13,861
Financing receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | $ 0 | $ 0

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