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Loans and Allowance for Credit Losses (Disaggregation of Credit Quality Disclosures) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Total Commercial [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | $ 3,894,188 | $ 5,076,311
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 3,938,641 | 3,073,804
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 2,391,137 | 2,114,506
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 1,620,517 | 1,285,226
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 916,732 | 1,003,833
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,798,084 | 1,385,473
Revolving Loans | 3,483,719 | 3,084,875
Revolving Loans Converted to Term Loans | 123,339 | 102,974
Notes Receivable Gross | 18,166,357 | 17,127,002
Total Commercial [Member] | Pass [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 3,769,590 | 4,946,459
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 3,810,862 | 3,008,160
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 2,297,865 | 2,035,849
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 1,537,650 | 1,212,306
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 854,345 | 937,639
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,695,383 | 1,296,382
Revolving Loans | 3,355,846 | 3,002,064
Revolving Loans Converted to Term Loans | 99,165 | 80,535
Notes Receivable Gross | 17,420,706 | 16,519,394
Total Commercial [Member] | Pass-Watch [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 42,903 | 68,421
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 94,955 | 19,467
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 52,211 | 31,598
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 48,653 | 45,846
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 37,491 | 27,188
Term Loans, Amortized Cost Basis by Origination Year, Prior | 71,871 | 69,310
Revolving Loans | 73,217 | 52,850
Revolving Loans Converted to Term Loans | 19,956 | 5,714
Notes Receivable Gross | 441,257 | 320,394
Total Commercial [Member] | Special Mention [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 32,940 | 17,536
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 11,387 | 2,683
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 26,631 | 10,296
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 3,732 | 12,410
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 1,507 | 10,669
Term Loans, Amortized Cost Basis by Origination Year, Prior | 5,787 | 3,656
Revolving Loans | 5,814 | 9,603
Revolving Loans Converted to Term Loans | 30 | 6,243
Notes Receivable Gross | 87,828 | 73,096
Total Commercial [Member] | Substandard [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 48,755 | 43,895
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 21,437 | 43,494
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 14,430 | 36,763
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 30,482 | 14,664
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 23,389 | 28,337
Term Loans, Amortized Cost Basis by Origination Year, Prior | 25,043 | 16,125
Revolving Loans | 48,842 | 20,358
Revolving Loans Converted to Term Loans | 4,188 | 10,482
Notes Receivable Gross | 216,566 | 214,118
Residential Mortgage and Consumer [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 550,250 | 581,378
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 664,564 | 468,448
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 544,897 | 357,851
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 273,996 | 227,959
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 163,439 | 325,063
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,020,517 | 916,726
Revolving Loans | 1,196,521 | 1,121,893
Revolving Loans Converted to Term Loans | 5,044 | 7,962
Notes Receivable Gross | 4,419,228 | 4,007,280
Residential Mortgage and Consumer [Member] | Performing [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 549,415 | 580,813
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 662,455 | 467,497
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 543,996 | 355,833
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 272,160 | 223,494
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 161,093 | 320,344
Term Loans, Amortized Cost Basis by Origination Year, Prior | 997,873 | 892,361
Revolving Loans | 1,195,933 | 1,120,461
Revolving Loans Converted to Term Loans | 4,002 | 5,995
Notes Receivable Gross | 4,386,927 | 3,966,798
Residential Mortgage and Consumer [Member] | Nonperforming [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 835 | 565
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 2,109 | 951
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 901 | 2,018
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 1,836 | 4,465
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 2,346 | 4,719
Term Loans, Amortized Cost Basis by Origination Year, Prior | 22,644 | 24,365
Revolving Loans | 588 | 1,432
Revolving Loans Converted to Term Loans | 1,042 | 1,967
Notes Receivable Gross | $ 32,301 | $ 40,482

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