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Goodwill And Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Roll Forward] |  |  |
Balance as of December 31, 2018 | $ 497,267 | $ 57,315 |
Goodwill impairment |  | 439,952 |
Balance as of December 31, 2019 | 452,390 | 497,267 | $ 57,315
Goodwill, Impairment Loss | 44,877 | 0 | 0
Other intangible assets, gross carrying amount | 69,900 | 69,900 |
Finite-Lived Intangible Assets, Accumulated Amortization | (24,788) | (14,229) |
Finite-Lived Intangible Assets, Net | 45,112 | 55,671 |
CDI |  |  |
Goodwill [Roll Forward] |  |  |
Other intangible assets, gross carrying amount | 57,400 | 57,400 |
Finite-Lived Intangible Assets, Accumulated Amortization | (19,829) | (10,436) |
Finite-Lived Intangible Assets, Net | 37,571 | 46,964 |
Community Banking Reporting Unit |  |  |
Goodwill [Roll Forward] |  |  |
Balance as of December 31, 2018 | 256,323 | 17,825 |
Goodwill impairment |  | 238,498 |
Balance as of December 31, 2019 | 256,323 | 256,323 | 17,825
Goodwill, Impairment Loss | 0 |  |
Wholesale Banking Reporting Unit |  |  |
Goodwill [Roll Forward] |  |  |
Balance as of December 31, 2018 | 171,636 | 11,936 |
Goodwill impairment |  | 159,700 |
Balance as of December 31, 2019 | 171,636 | 171,636 | 11,936
Goodwill, Impairment Loss | 0 |  |
Consumer Mortgages Reporting Unit |  |  |
Goodwill [Roll Forward] |  |  |
Balance as of December 31, 2018 | 44,877 | 3,123 |
Goodwill impairment |  | 41,754 |
Balance as of December 31, 2019 | 0 | 44,877 | 3,123
Goodwill, Impairment Loss | 44,877 |  |
Wealth Management Reporting Unit |  |  |
Goodwill [Roll Forward] |  |  |
Balance as of December 31, 2018 | 24,431 | 24,431 |
Goodwill impairment |  | 0 |
Balance as of December 31, 2019 | 24,431 | $ 24,431 | $ 24,431
Goodwill, Impairment Loss | $ 0 |  |

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