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Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | $ 132,251 | $ 121,797
Financing Receivable, Nonaccrual, No Allowance | 113,625 | 90,854
Financing Receivable, Nonaccrual, With Allowance | 18,626 | 30,943
Financing Receivable, Nonaccrual, Related Allowance | 9,366 | 5,570
Commercial [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 73,277 | 60,297
Financing Receivable, Nonaccrual, No Allowance | 64,542 | 45,531
Financing Receivable, Nonaccrual, With Allowance | 8,735 | 14,766
Financing Receivable, Nonaccrual, Related Allowance | 7,816 | 4,020
Commercial [Member] | Energy [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 20,037 | 1,399
Financing Receivable, Nonaccrual, No Allowance | 20,037 | 1,399
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | 0 | 0
Commercial [Member] | Healthcare [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 36,753 | 41,034
Financing Receivable, Nonaccrual, No Allowance | 36,753 | 34,661
Financing Receivable, Nonaccrual, With Allowance | 0 | 6,373
Financing Receivable, Nonaccrual, Related Allowance | 0 | 946
Commercial [Member] | Services [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 4,541 | 16,228
Financing Receivable, Nonaccrual, No Allowance | 404 | 7,835
Financing Receivable, Nonaccrual, With Allowance | 4,137 | 8,393
Financing Receivable, Nonaccrual, Related Allowance | 3,218 | 3,074
Commercial [Member] | General business [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 11,946 | 1,636
Financing Receivable, Nonaccrual, No Allowance | 7,348 | 1,636
Financing Receivable, Nonaccrual, With Allowance | 4,598 | 0
Financing Receivable, Nonaccrual, Related Allowance | 4,598 | 0
Commercial real estate [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 17,395 | 16,570
Financing Receivable, Nonaccrual, No Allowance | 7,504 | 393
Financing Receivable, Nonaccrual, With Allowance | 9,891 | 16,177
Financing Receivable, Nonaccrual, Related Allowance | 1,550 | 1,550
Loans to individuals [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Nonaccrual | 41,579 | 44,930
Financing Receivable, Nonaccrual, No Allowance | 41,579 | 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 | 29,973 | 29,791
Financing Receivable, Nonaccrual, No Allowance | 29,973 | 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 | 133 | 134
Financing Receivable, Nonaccrual, No Allowance | 133 | 134
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 | 11,473 | 15,005
Financing Receivable, Nonaccrual, No Allowance | 11,473 | 15,005
Financing Receivable, Nonaccrual, With Allowance | 0 | 0
Financing Receivable, Nonaccrual, Related Allowance | $ 0 | $ 0

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