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Segments Segments (Segment Balance Sheet Data) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Average Assets | $ 29,616,697 | $ 25,213,525
Average Loans, including held for sale | 15,915,533 | 14,243,214
Average Goodwill and other intangible assets | 147,370 | 147,910
Average Deposits | 23,497,477 | 19,909,891
Consumer Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Average Assets | 2,238,473 | 2,375,326
Average Loans, including held for sale | 2,099,784 | 2,239,100
Average Goodwill and other intangible assets | 78,353 | 79,055
Average Deposits | 11,282,164 | 10,236,257
Commercial Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Average Assets | 10,937,391 | 9,486,074
Average Loans, including held for sale | 10,565,800 | 9,250,645
Average Goodwill and other intangible assets | 67,956 | 68,109
Average Deposits | 9,937,985 | 7,848,367
Wealth Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Average Assets | 1,406,416 | 1,288,387
Average Loans, including held for sale | 1,395,766 | 1,276,839
Average Goodwill and other intangible assets | 746 | 746
Average Deposits | 2,271,166 | 1,832,418
Segment Totals [Member] |  |
Segment Reporting Information [Line Items] |  |
Average Assets | 14,582,280 | 13,149,787
Average Loans, including held for sale | 14,061,350 | 12,766,584
Average Goodwill and other intangible assets | 147,055 | 147,910
Average Deposits | 23,491,315 | 19,917,042
Other/Elimination [Member] |  |
Segment Reporting Information [Line Items] |  |
Average Assets | 15,034,417 | 12,063,738
Average Loans, including held for sale | 1,854,183 | 1,476,630
Average Goodwill and other intangible assets | 315 | 0
Average Deposits | $ 6,162 | $ (7,151)

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