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Stock Transactions and Unit Redemptions - Gross Unit Redemptions and Share Repurchases of Class A Common Stock (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2021 | Feb. 28, 2021 | Mar. 31, 2021
Stock Transactions Parenthetical Disclosures [Abstract] |  |  |
Redemptions, Number of Units |  |  | 20
Repurchases, Number of Shares | 3 | 962 | 965
Total Number of Units Redeemed or Shares Repurchased |  |  | 985
Redemptions, Weighted Average Price Paid per Unit or Share |  |  | $ 4.40
Repurchases, Weighted Average Price Paid per Unit or Shares | $ 4.29 | $ 4.56 | 4.56
Total Redemptions and Repurchases, Weighted Average Price Paid per Unit or Shares |  |  | $ 4.56
Total Redemptions and Repurchases, Approximate Dollar Value of Units and Shares That May Yet Be Redeemed/Purchased Under the Program | $ 245,422 |  | $ 245,422

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