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Income Taxes - Textual (Details) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
U.S. federal | Earliest Tax Year |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Open tax year | 2016 |  |
State | Earliest Tax Year |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Open tax year | 2016 |  |
Metropolitan |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating losses |  | $ 74.7 |
Reliance Bancshares, Inc. |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating losses |  |  | $ 44.2

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