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Loans and Allowances for Credit Losses, By Aging Category (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | $ 76,114 | $ 119,132
Current and Past Due Performing Loans | 22,557,150 | 20,205,680
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 22,355,864 | 19,980,847
30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 55,039 | 43,102
60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 51,614 | 27,870
90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 94,633 | 153,861
Commercial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 199
Current and Past Due Performing Loans | 14,198,187 | 12,506,465
Commercial [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 14,156,787 | 12,472,930
Commercial [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 7,024 | 9,904
Commercial [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 28,959 | 9,333
Commercial [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 5,417 | 14,298
Commercial [Member] | Healthcare [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 0
Current and Past Due Performing Loans | 3,845,017 | 3,414,940
Commercial [Member] | Healthcare [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 3,812,164 | 3,412,072
Commercial [Member] | Healthcare [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 5,914 | 2,359
Commercial [Member] | Healthcare [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 26,480 | 0
Commercial [Member] | Healthcare [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 459 | 509
Commercial [Member] | Energy [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 0
Current and Past Due Performing Loans | 3,424,790 | 3,006,884
Commercial [Member] | Energy [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 3,424,766 | 3,002,623
Commercial [Member] | Energy [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 24 | 545
Commercial [Member] | Energy [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 0 | 3,716
Commercial [Member] | Energy [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 0 | 0
Commercial [Member] | Services [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 0
Current and Past Due Performing Loans | 3,431,521 | 3,367,193
Commercial [Member] | Services [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 3,423,042 | 3,352,639
Commercial [Member] | Services [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 1,060 | 920
Commercial [Member] | Services [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 2,461 | 4,620
Commercial [Member] | Services [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 4,958 | 9,014
Commercial [Member] | General business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 199
Current and Past Due Performing Loans | 3,496,859 | 2,717,448
Commercial [Member] | General business [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 3,496,815 | 2,705,596
Commercial [Member] | General business [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 26 | 6,080
Commercial [Member] | General business [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 18 | 997
Commercial [Member] | General business [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 0 | 4,775
Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 0
Current and Past Due Performing Loans | 4,606,777 | 3,831,325
Commercial real estate [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 4,606,029 | 3,827,962
Commercial real estate [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 531 | 0
Commercial real estate [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 0 | 206
Commercial real estate [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 217 | 3,157
Paycheck Protection Program |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 396 | 74
Current and Past Due Performing Loans | 14,312 | 276,341
Paycheck Protection Program | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 12,279 | 276,341
Paycheck Protection Program | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 231 | 0
Paycheck Protection Program | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 1,406 | 0
Paycheck Protection Program | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 396 | 0
Loans to individuals [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 75,718 | 118,859
Current and Past Due Performing Loans | 3,737,874 | 3,591,549
Loans to individuals [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 3,580,769 | 3,403,614
Loans to individuals [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 47,253 | 33,198
Loans to individuals [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 21,249 | 18,331
Loans to individuals [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 88,603 | 136,406
Loans to individuals [Member] | Residential mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 114 | 0
Current and Past Due Performing Loans | 1,890,784 | 1,722,170
Loans to individuals [Member] | Residential mortgage [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 1,872,155 | 1,707,654
Loans to individuals [Member] | Residential mortgage [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 10,632 | 6,263
Loans to individuals [Member] | Residential mortgage [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 1,828 | 1,556
Loans to individuals [Member] | Residential mortgage [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 6,169 | 6,697
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 75,604 | 118,819
Current and Past Due Performing Loans | 245,940 | 354,173
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 108,019 | 181,022
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 36,119 | 26,869
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 19,400 | 16,751
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 82,402 | 129,531
Loans to individuals [Member] | Personal [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due 90 Days or More and Accruing | 0 | 40
Current and Past Due Performing Loans | 1,601,150 | 1,515,206
Loans to individuals [Member] | Personal [Member] | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 1,600,595 | 1,514,938
Loans to individuals [Member] | Personal [Member] | 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 502 | 66
Loans to individuals [Member] | Personal [Member] | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | 21 | 24
Loans to individuals [Member] | Personal [Member] | 90 Days or More [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current and Past Due Performing Loans | $ 32 | $ 178

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