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Loans - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans, net of unearned income | $ 32,708,937 | [1] |  | $ 31,061,111 | [1] | $ 29,712,810 |  |
Allowance for loan losses | 537,881 |  | $ 444,490 | 200,307 |  | 192,749 | $ 184,911 | $ 180,424
Total net loans | 32,171,056 |  |  | 30,860,804 |  |  |  |
Commercial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Allowance for loan losses |  |  |  | 158,598 |  |  |  |
Commercial | Commercial, financial, and industrial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans, net of unearned income | 21,393,893 |  |  | 20,051,091 |  | 19,054,269 |  |
Allowance for loan losses | 318,722 |  | 254,516 | 122,486 |  | 116,096 | 103,713 | 98,947
Commercial | Commercial real estate |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans, net of unearned income | 4,813,341 |  |  | 4,337,017 |  | 3,861,031 |  |
Allowance for loan losses | 57,285 |  | 47,625 | 36,112 |  | 32,953 | 34,382 | 31,311
Consumer | Consumer real estate |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans, net of unearned income | 6,052,393 |  |  | 6,177,139 |  | 6,303,134 |  |
Allowance for loan losses | 143,757 |  | 123,022 | 28,443 |  | 31,532 | 34,154 | 37,439
Consumer | Credit Card and Other |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans, net of unearned income | 449,310 |  |  | 495,864 |  | 494,376 |  |
Allowance for loan losses | $ 18,117 |  | $ 19,327 | $ 13,266 |  | $ 12,168 | $ 12,662 | $ 12,727
[1] | June 30, 2020 and December 31, 2019 include $16.9 million and $18.8 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

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