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Information with Respect to Class A Common Shares that were Surrendered or Repurchased (Detail) - Class A Common Shares - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1] | 468,860 | 15,954
Average Price Paid Per Share | [1] | $ 27.04 | $ 25.94
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] |  | 0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1] |  | $ 0
January 1-31, 2023 | Employee |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[2] | 3,302 |
Average Price Paid Per Share | [1] | $ 23.31 |
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] | 0 |
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1],[3] | $ 0 |
January 1-31, 2023 | $135 Million Share Repurchase Program |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[4] | 250,000 |
Average Price Paid Per Share | [1] | $ 25.9 |
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] | 250,000 |
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1],[3] | $ 106,604,066 |
April 1-30, 2023 | $135 Million Share Repurchase Program |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[4] | 200,000 |
Average Price Paid Per Share | [1] | $ 28 |
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] | 200,000 |
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1],[3] | $ 101,004,066 |
June 1-30, 2023 | Employee |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[4] | 15,558 |
Average Price Paid Per Share | [1] | $ 33.74 |
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] | 0 |
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1],[3] | $ 101,004,066 |
January 1-31, 2022 | Employee |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[2] |  | 4,781
Average Price Paid Per Share | [1] |  | $ 25.13
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] |  | 0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1] |  | $ 0
June 1-30, 2022 | Employee |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased | [1],[2] |  | 11,173
Average Price Paid Per Share | [1] |  | $ 26.28
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program | [1] |  | 0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | [1] |  | $ 0
[1] | Based on settlement date.
[2] | Surrendered by employees as payment of taxes withheld on the vesting of restricted stock and/or restricted stock units.
[3] | Based on the $135 million share repurchase authorization.
[4] | Purchased as part of the repurchase program announced in October 2022.

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