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Stock Transactions and Unit Redemptions - Additional Information (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended |  |  |
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Feb. 28, 2021 $ / shares shares | Jan. 31, 2021 $ / shares shares | Mar. 31, 2021 USD ($) vote shares class $ / shares | Mar. 31, 2020 shares | Feb. 17, 2021 shares | Dec. 31, 2020 $ / shares shares | Dec. 31, 2019 shares
Class of Stock |  |  |  |  |  |  |
Number of authorized classes of common stock | class |  |  | 2 |  |  |  |
Number of shares authorized to be repurchased (in shares) |  |  |  |  | 400,000,000.0 |  |
Common Class A |  |  |  |  |  |  |
Class of Stock |  |  |  |  |  |  |
Common stock, votes per share | vote |  |  | 1 |  |  |  |
Common stock, shares authorized (in shares) |  |  | 1,000,000,000 |  |  | 1,000,000,000 |
Common stock, par value (in usd per share) | $ / shares |  |  | $ 0.01 |  |  | $ 0.01 |
Common stock, shares outstanding (in shares) |  |  | 163,113,922 | 156,701,746 |  | 161,175,894 | 156,265,461
Treasury stock repurchases (in shares) | 0 | 0 | 879,243 | 0 |  |  |
Shares repurchased price (in dollars per share) | $ / shares | $ 0 | $ 0 | $ 10.57 |  |  |  |
Share repurchase and redemption unit remaining authorized amount | $ |  |  | $ 390,386 |  |  |  |
Common Class B |  |  |  |  |  |  |
Class of Stock |  |  |  |  |  |  |
Common stock, votes per share | vote |  |  | 10 |  |  |  |
Common stock, shares authorized (in shares) |  |  | 500,000,000 |  |  | 500,000,000 |
Common stock, par value (in usd per share) | $ / shares |  |  | $ 0.01 |  |  | $ 0.01 |
Conversion of common stock (in shares) |  |  | 1 |  |  |  |
Common stock, shares outstanding (in shares) |  |  | 21,285,533 |  |  | 21,285,533 |

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