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Information with Respect to Class A Common Shares that were Surrendered, Repurchased or Redeemed (Detail) - Class A Common Shares - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed 923,036 [1] 17,318
Average Price Paid Per Share $ 24.20 [1] $ 28.30
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program 907,082 [1] 0
January 1-31, 2021    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed   6,720
Average Price Paid Per Share   $ 28.59
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
March 1-31, 2021    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed   3,095
Average Price Paid Per Share   $ 29.40
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
June 1-30, 2021    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed   7,100
Average Price Paid Per Share   $ 27.64
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
November 1-30, 2021    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed   403
Average Price Paid Per Share   $ 26.80
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
January 1-31, 2022    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed [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],[3] $ 0  
June 1-30, 2022    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed [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],[3] $ 0  
October 1-31, 2022    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed [1],[4] 200,000  
Average Price Paid Per Share [1] $ 23.49  
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] $ 27,302,000  
November 1-30, 2022    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed [1],[4] 250,000  
Average Price Paid Per Share [1] $ 24.50  
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] $ 21,177,000  
December 1-31, 2022    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased or Redeemed [1],[4] 457,082  
Average Price Paid Per Share [1] $ 24.28  
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program [1] 457,082  
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs [1],[3] $ 10,079,066  
[1] Based on settlement date.
[2] Surrendered by employees as payment of taxes withheld on the vesting of restricted stock.
[3] Based on the $32 million share repurchase authorization announced on October 21, 2022.
[4] Purchased as part of the repurchase program announced in October 2022.