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v3.23.1

Business Combinations - Narrative (Details) $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 loan shares | Mar. 20, 2023 USD ($) branch | Mar. 31, 2023 USD ($) loan | Dec. 31, 2022 USD ($) | Mar. 31, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Number of branches | loan | 435 |  | 435 |  |
Bargain purchase gain | $ |  |  | $ 2,001 | $ 159 | $ 0
Signature Bridge Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Bargain purchase gain | $ |  | $ 2,001 | $ 2,000 |  |
Signature Bridge Bank | Core Deposits |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Estimated useful life |  | 10 years |  |  |
Signature Bridge Bank | FDIC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares issued (in shares) | shares | 39,032,006 |  |  |  |
Number of days to sell shares |  | 40 days |  |  |
Signature Bridge Bank | New York |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches |  | 29 |  |  |
Signature Bridge Bank | California |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches |  | 7 |  |  |
Signature Bridge Bank | North Carolina |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches |  | 2 |  |  |
Signature Bridge Bank | Connecticut |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches |  | 1 |  |  |
Signature Bridge Bank | Nevada |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches |  | 1 |  |  |

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