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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, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Aug. 31, 2023 | Jul. 31, 2023 | Sep. 30, 2022 | Aug. 31, 2022 | Jul. 31, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemptions (in shares) |  |  |  |  |  |  | 0 | 422,000 | 23,000 | 214,000 | 1,010,000 | 43,000 | 445,000 | 1,267,000
Repurchases (in shares) | 3,474,000 | 1,612,000 | 3,000,000 | 3,448,000 | 5,916,000 | 3,033,000 | 8,087,000 | 9,814,000 | 846,000 | 12,397,000 | 8,745,000 | 0 | 18,747,000 | 21,142,000
Total redemptions and repurchases (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 19,191,000 | 22,409,000
Redemptions, weighted average price paid per unit or share (in dollars per share) |  |  |  |  |  |  | $ 0 | $ 4.91 | $ 3.90 | $ 3.91 | $ 3.81 | $ 4.01 | $ 4.85 | $ 3.83
Repurchases, weighted average price paid per unit or shares (in dollars per share) | $ 5.24 | $ 5.01 | $ 4.68 | $ 4.11 | $ 4.14 | $ 3.70 |  | $ 4.44 | $ 4.97 |  | $ 3.36 | $ 0 | 4.70 | 3.75
Total redemptions and repurchases, weighted average price paid per unit or shares (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.70 | $ 3.76
Approximate Dollar Value of Units and Shares That Could Be Redeemed/ Purchased Under the Program at September 30, 2023 | $ 359,656 |  |  | $ 107,655 |  |  | $ 359,656 |  |  | $ 107,655 |  |  | $ 359,656 | $ 107,655
Weighted-average price for redemption of limited partnership units (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 4.05 |  |  |  | $ 3.88
Aggregate purchase price of Class A common stock |  |  |  |  |  |  |  |  |  |  |  |  | $ 86,537 | $ 79,295
Class A Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchases (in shares) |  |  |  |  |  |  | 8,086,750 |  |  | 12,396,735 |  |  | 18,746,467 | 21,142,045
Approximate Dollar Value of Units and Shares That Could Be Redeemed/ Purchased Under the Program at September 30, 2023 | $ 359,700 |  |  |  |  |  | $ 359,700 |  |  |  |  |  | $ 359,700 |
Conversion, shares issued (in shares) |  |  |  |  |  |  | 200,000 |  |  | 5,800,000 |  |  | 20,400,000 | 13,700,000
Stock issued during period, shares, exchange of units |  |  |  |  |  |  |  |  |  | 6,100,000 |  |  | 13,500,000 | 10,600,000
Stock repurchased during period (in shares) |  |  |  |  |  |  | 8,100,000 |  |  | 12,400,000 |  |  | 18,700,000 | 21,100,000
Aggregate purchase price of Class A common stock |  |  |  |  |  |  | $ 40,300 |  |  | $ 49,900 |  |  | $ 88,100 | $ 79,300
Stock repurchased, weighted average price (in dollars per share) |  |  |  |  |  |  | $ 4.99 |  |  | $ 4.03 |  |  | $ 4.70 | $ 3.75
Limited Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemed limited partnership units (in shares) |  |  |  |  |  |  |  |  |  | 200,000 |  |  | 300,000 | 1,200,000
Aggregate redemption price of limited partnership units |  |  |  |  |  |  |  |  |  | $ 800 |  |  | $ 1,400 | $ 4,500
Weighted-average price for redemption of founding/working partner units (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.71 |
FPUs |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemed limited partnership units (in shares) |  |  |  |  |  |  |  |  |  | 27,000 |  |  | 200,000 | 100,000
Aggregate redemption price of limited partnership units |  |  |  |  |  |  |  |  |  | $ 100 |  |  | $ 800 | $ 300
Weighted-average price for redemption of founding/working partner units (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 2.96 |  |  | $ 5.11 | $ 3.23

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