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Subsequent Events (Details) $ / shares in Units, $ in Millions |  |  |  |  |  |  | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 05, 2021 USD ($) $ / shares | Aug. 02, 2021 USD ($) shares | Jul. 02, 2021 shares | Jun. 25, 2021 shares | Nov. 30, 2020 shares | Dec. 02, 2019 shares | Jun. 30, 2021 shares
Subsequent Event |  |  |  |  |  |  |
Shares settled (in shares) |  |  |  |  | 741,505 | 898,685 | 944,329
Common Stock | Nasdaq Earn-Out |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Shares settled (in shares) |  |  |  | 6,222,340 |  |  |
Subsequent Event |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Shares authorized for repurchase | $ | $ 400.0 |  |  |  |  |  |
Subsequent Event | Affiliated Entity |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Percentage above fair market value of collateral provided (percent) |  | 130.00% |  |  |  |  |
Minimum maintenance margin of collateral provided (percent) |  | 120.00% |  |  |  |  |
Subsequent Event | CF Secured | Affiliated Entity |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Initial cash to repurchase shares rate |  | 0.0095 |  |  |  |  |
Subsequent Event | Revolving Credit Facility | CF Secured | Affiliated Entity |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Debt instrument yield (in percentage) |  | 1.00% |  |  |  |  |
Subsequent Event | Nasdaq Earn-Out | Affiliated Entity | CF Secured |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Proceeds received to repurchase shares | $ |  | $ 260.0 |  |  |  |  |
Shares delivered as collateral (shares) |  | 1,818,000 |  |  |  |  |
Subsequent Event | Common Stock | Nasdaq Earn-Out |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Shares settled (in shares) |  |  | 944,329 |  |  |  |
Subsequent Event | Common Class A |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Common stock dividends per share declared (in dollars per share) | $ / shares | $ 0.01 |  |  |  |  |  |
Subsequent Event | Common Class B |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |
Common stock dividends per share declared (in dollars per share) | $ / shares | $ 0.01 |  |  |  |  |  |

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