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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | $ 52,344 | $ 51,762
Noninterest income (out-of-scope of Topic 606)(b) | 22,123 | 43,581
Total noninterest income | 74,467 | 95,343
Whitnell |  |
Disaggregation of Revenue [Line Items] |  |
Gain (Loss) on Sale and Maturity of Other Investments, Before Tax | 2,000 | 2,000
Wealth management fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 22,404 | 22,414
Service charges and deposit account fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 16,856 | 14,855
Card-based fees(a) |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 9,949 | 9,764
Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 3,135 | 4,729
Corporate and Commercial Specialty |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 27,840 | 27,365
Noninterest income (out-of-scope of Topic 606)(b) | 9,950 | 14,464
Corporate and Commercial Specialty | Wealth management fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 22,404 | 22,414
Corporate and Commercial Specialty | Service charges and deposit account fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 3,784 | 3,941
Corporate and Commercial Specialty | Card-based fees(a) |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 417 | 346
Corporate and Commercial Specialty | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 1,235 | 664
Community, Consumer, and Business |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 24,455 | 23,988
Noninterest income (out-of-scope of Topic 606)(b) | 8,751 | 23,342
Community, Consumer, and Business | Service charges and deposit account fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 13,069 | 10,900
Community, Consumer, and Business | Card-based fees(a) |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 9,524 | 9,414
Community, Consumer, and Business | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 1,862 | 3,674
Risk Management and Shared Services |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 49 | 409
Noninterest income (out-of-scope of Topic 606)(b) | 3,421 | 5,775
Risk Management and Shared Services | Service charges and deposit account fees |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 3 | 15
Risk Management and Shared Services | Card-based fees(a) |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 7 | 4
Risk Management and Shared Services | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income (in-scope of Topic 606) | 38 | 391
Operating Segments [Member] | Corporate and Commercial Specialty |  |
Disaggregation of Revenue [Line Items] |  |
Total noninterest income | 37,790 | 41,828
Operating Segments [Member] | Community, Consumer, and Business |  |
Disaggregation of Revenue [Line Items] |  |
Total noninterest income | 33,207 | 47,331
Operating Segments [Member] | Risk Management and Shared Services |  |
Disaggregation of Revenue [Line Items] |  |
Total noninterest income | $ 3,470 | $ 6,184

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