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Acquisitions and Divestitures - Narrative (Details) $ in Thousands | Jul. 17, 2020 USD ($) branch | Jul. 01, 2020 USD ($) office state shares | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Apr. 30, 2019 USD ($)
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Assets |  |  | $ 48,644,659 | $ 43,310,900 |
Total loans, net of unearned income and allowance for loan losses |  |  | 32,171,056 | 30,860,804 |
Securities available-for-sale |  |  | 5,476,156 | 4,445,403 |
Deposits |  |  | $ 37,759,351 | $ 32,429,535 |
Subprime Consumer Loans | Discontinued Operations, Held-for-sale |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Loans disposed of |  |  |  |  | $ 25,000
Subsequent Event | SunTrust Banks, Inc. Branches |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of bank branches | branch | 30 |  |  |  |
Loans | $ 423,700 |  |  |  |
Deposits | $ 2,200,000 |  |  |  |
Deposits premium percent | 3.40% |  |  |  |
Subsequent Event | IBERIABANK (IBKC) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Equity interest issued, number of shares (in shares) | shares |  | 242,000,000 |  |  |
Equity interest issued, value assigned |  | $ 2,500,000 |  |  |
Number of offices | office |  | 319 |  |  |
Number of states | state |  | 12 |  |  |
Assets |  | $ 34,700,000 |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 26,100,000 |  |  |
Securities available-for-sale |  | 3,500,000 |  |  |
Deposits |  | $ 28,300,000 |  |  |
Subsequent Event | NORTH CAROLINA | SunTrust Banks, Inc. Branches |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of bank branches | branch | 20 |  |  |  |
Subsequent Event | VIRGINIA | SunTrust Banks, Inc. Branches |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of bank branches | branch | 8 |  |  |  |
Subsequent Event | GEORGIA | SunTrust Banks, Inc. Branches |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of bank branches | branch | 2 |  |  |  |

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