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Segment Reporting - Narrative (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | segment | 3 |  |
Investment securities gains (losses), net | $ (799) | $ 78,931 | $ (7,659)
Goodwill impairment | 0 | 44,877 | $ 0
Treasury and Corporate Other |  |  |
Segment Reporting Information [Line Items] |  |  |
PPP fees | 79,200 | 46,000 |
Increase in PPP fees | $ 33,200 |  |
Operating Segments | Consumer Mortgage Reporting Unit |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill impairment |  | $ 44,900 |

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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
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