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Summary of Number of Shares of Common Stock Repurchased (Detail) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2022
Aug. 31, 2022
Jun. 30, 2022
May 31, 2022
Apr. 30, 2022
Mar. 31, 2022
Sep. 30, 2022
Sep. 30, 2022
Equity Class Of Treasury Stock [Line Items]                
Number of shares purchased 387,340   606     332,404    
Average price paid per share $ 19.36   $ 19.99          
Total amount paid $ 7,499   $ 13     $ 6,219    
Maximum number of shares that may yet be purchased under the plan 279,650   666,990     667,596 279,650 279,650
Share Repurchase Arrangement                
Equity Class Of Treasury Stock [Line Items]                
Number of shares purchased             1,190,150 1,523,160
Number of shares received   802,810            
Average price paid per share   $ 19.93            
Total amount paid   $ 16,000            
Common Stock                
Equity Class Of Treasury Stock [Line Items]                
Number of shares purchased 222,301 165,039   506 100 332,404   720,350
Average price paid per share $ 19.19 $ 19.59   $ 19.99 $ 19.99 $ 18.71   $ 19.06
Total amount paid $ 4,265,000 $ 3,234,000   $ 11,000 $ 2,000 $ 6,219,000   $ 13,731,000
Maximum number of shares that may yet be purchased under the plan 279,650 501,951   666,990 667,496 667,596 279,650 279,650