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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 | 12 Months Ended
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Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemptions (in shares) |  |  |  | 99 | 214 | 1,010 | 43 | 38 | 73 | 4,715 | 20 | 1,366 | 4,846
Repurchases (in shares) | 1,804 | 3,834 | 307 |  | 12,397 | 8,745 | 0 | 26,313 | 24,433 | 16,542 | 965 | 27,087 | 68,253
Total redemptions and repurchases (in shares) |  |  |  |  |  |  |  |  |  |  |  | 28,453 | 73,099
Redemptions (in dollars per share) |  |  |  | $ 3.88 | $ 3.91 | $ 3.81 | $ 4.01 | $ 5.37 | $ 5.14 | $ 5.82 | $ 4.40 | $ 3.84 | $ 5.80
Repurchases (in dollars per share) | $ 4.48 | $ 3.99 | $ 3.93 |  | $ 4.03 | $ 3.36 | $ 0 | $ 4.97 | $ 5.19 | $ 6.25 | $ 4.56 | 3.84 | 5.35
Total redemptions and repurchases (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 3.84 | $ 5.38
Approximate Dollar Value of Units and Shares That Could Be Redeemed/ Purchased Under the Program at December 31, 2022 | $ 376,413 |  |  | $ 376,413 |  |  |  | $ 191,809 |  |  |  | $ 376,413 | $ 191,809

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