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Other Assets and Other Liabilities Held for Sale (Details) - USD ($) $ in Millions |  |  |  | 2 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 01, 2020 | May 31, 2020 | Feb. 28, 2020 | Jul. 31, 2020 | Mar. 31, 2020
Business Acquisition [Line Items] |  |  |  |  |
Gain on sale of business |  |  |  |  | $ 5.9
First Western Trust Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total loans, excluding loans not subject to branch purchase |  |  |  |  | 114.9
Total deposits, excluding deposits not subject to branch purchase |  |  |  |  | $ 58.4
Forecast | First Western Trust Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Post closing adjustment multiplier, percent | 8.06% | 6.06% |  | 7.06% |
Disposal Group, Held-for-sale, Not Discontinued Operations | Spirit of Texas Bank, SSB |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gain on sale of business |  |  | $ 5.9 |  |

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