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Capital Stock (Details) - USD ($) | 12 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 31, 2022 | Jul. 23, 2021 | Mar. 05, 2020 | Oct. 29, 2019 | Oct. 22, 2019 | Apr. 19, 2018 | Apr. 18, 2018 | Jul. 23, 2012 | Feb. 27, 2009
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  | 40,040,000 |  |  |  |  |  |  |  |  |  | 40,040,000
Preferred stock, par value (in dollars per share) |  | $ 0.01 |  |  |  |  |  |  |  |  |  | $ 0.01
Common stock, shares authorized (in shares) | 175,000,000 | 175,000,000 |  |  |  |  |  |  | 175,000,000 | 120,000,000 |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) |  |  |  |  | 276,500,000 | 180,000,000 |  | 60,000,000 |  |  | 1,700,000 |
Stock repurchases (in shares) | 4,562,469 | 5,956,700 | 390,000 |  |  |  |  |  |  |  |  |
Stock repurchases, average price (in dollars per share) | $ 29.03 | $ 19.03 |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference, value |  |  |  |  |  |  |  |  |  |  |  | $ 80,000,000
Series D Preferred Stock | Reliance Bancshares, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  |  |  |  |  | $ 0.01 |  |  |  |  |
Common Class A | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) |  |  |  | 175,000,000 |  |  |  |  |  |  |  |

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