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Loans and Allowance for Credit Losses (Disaggregation of Credit Quality Disclosures) (Details) - USD ($) $ in Thousands | Jun. 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 | $ 2,736,774 | $ 5,076,311
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 4,167,782 | 3,073,804
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 2,560,873 | 2,114,506
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 1,769,169 | 1,285,226
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 996,340 | 1,003,833
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,990,171 | 1,385,473
Revolving Loans | 3,293,586 | 3,084,875
Revolving Loans Converted to Term Loans | 144,841 | 102,974
Notes Receivable Gross | 17,659,536 | 17,127,002
Total Commercial [Member] | Pass [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 2,647,233 | 4,946,459
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 4,097,352 | 3,008,160
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 2,496,832 | 2,035,849
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 1,688,087 | 1,212,306
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 930,288 | 937,639
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,882,405 | 1,296,382
Revolving Loans | 3,151,983 | 3,002,064
Revolving Loans Converted to Term Loans | 132,146 | 80,535
Notes Receivable Gross | 17,026,326 | 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 | 32,871 | 68,421
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 39,597 | 19,467
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 41,917 | 31,598
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 37,494 | 45,846
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 38,875 | 27,188
Term Loans, Amortized Cost Basis by Origination Year, Prior | 62,750 | 69,310
Revolving Loans | 92,695 | 52,850
Revolving Loans Converted to Term Loans | 5,983 | 5,714
Notes Receivable Gross | 352,182 | 320,394
Total Commercial [Member] | Special Mention [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 29,654 | 17,536
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 11,833 | 2,683
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 8,346 | 10,296
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 4,411 | 12,410
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 10,083 | 10,669
Term Loans, Amortized Cost Basis by Origination Year, Prior | 15,097 | 3,656
Revolving Loans | 18,722 | 9,603
Revolving Loans Converted to Term Loans | 1,563 | 6,243
Notes Receivable Gross | 99,709 | 73,096
Total Commercial [Member] | Substandard [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 27,016 | 43,895
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 19,000 | 43,494
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 13,778 | 36,763
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 39,177 | 14,664
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 17,094 | 28,337
Term Loans, Amortized Cost Basis by Origination Year, Prior | 29,919 | 16,125
Revolving Loans | 30,186 | 20,358
Revolving Loans Converted to Term Loans | 5,149 | 10,482
Notes Receivable Gross | 181,319 | 214,118
Residential Mortgage and Consumer [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Term Loans, Amortized Cost Basis by Origination Year, 2022 | 350,968 | 581,378
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 602,562 | 468,448
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 518,932 | 357,851
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 290,670 | 227,959
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 176,098 | 325,063
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,073,416 | 916,726
Revolving Loans | 1,169,158 | 1,121,893
Revolving Loans Converted to Term Loans | 4,728 | 7,962
Notes Receivable Gross | 4,186,532 | 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 | 350,898 | 580,813
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 601,109 | 467,497
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 518,412 | 355,833
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 288,601 | 223,494
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 173,446 | 320,344
Term Loans, Amortized Cost Basis by Origination Year, Prior | 1,051,413 | 892,361
Revolving Loans | 1,168,323 | 1,120,461
Revolving Loans Converted to Term Loans | 4,035 | 5,995
Notes Receivable Gross | 4,156,237 | 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 | 70 | 565
Term Loans, Amortized Cost Basis by Origination Year, 2021 | 1,453 | 951
Term Loans, Amortized Cost Basis by Origination Year, 2020 | 520 | 2,018
Term Loans, Amortized Cost Basis by Origination Year, 2019 | 2,069 | 4,465
Term Loans, Amortized Cost Basis by Origination Year, 2018 | 2,652 | 4,719
Term Loans, Amortized Cost Basis by Origination Year, Prior | 22,003 | 24,365
Revolving Loans | 835 | 1,432
Revolving Loans Converted to Term Loans | 693 | 1,967
Notes Receivable Gross | $ 30,295 | $ 40,482

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