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Subsequent Events - Textual (Details) - Subsequent Event - USD ($) | Oct. 29, 2019 | Oct. 22, 2019
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The Program | Common Class A |  |
Subsequent Event [Line Items] |  |
Stock repurchase program, authorized amount |  | $ 60,000,000
Reliance Bancshares, Inc. | Series D Preferred Stock |  |
Subsequent Event [Line Items] |  |
Preferred stock, Class B, par value (in dollars per share) | $ 0.01 |
Reliance Bancshares, Inc. | Convertible Preferred Stock |  |
Subsequent Event [Line Items] |  |
Preferred stock, Class B, par value (in dollars per share) | $ 0.01 |
Preferred stock, dividend rate, percentage | 7.00% |
Reliance Bancshares, Inc. | Series C Preferred Stock |  |
Subsequent Event [Line Items] |  |
Preferred stock, shares authorized (in shares) | 140 |
Preferred stock, shares issued (in shares) | 0 |
Preferred stock, shares outstanding (in shares) | 0 |

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