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Accounting for Stock Based Compensation - Summarizes Stock Appreciation Rights (SARs) Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock Options Outstanding, beginning balance, Shares 206,750 428,000 869,000    
Granted, Shares 0 0 0 0 0
Exercised, Shares (44,116) (215,250) (434,250)    
Forfeited, Shares   (6,000) (6,750)    
Stock Options Outstanding, ending balance, Shares 162,634 206,750 428,000 869,000  
Exercisable, Ending Balance 162,634        
Stock Options Outstanding, beginning balance, Weighted-Average Exercise Price $ 36.72 $ 37.61 $ 37.87    
Exercised, Weighted-Average Exercise Price 37.87 38.46 38.12    
Forfeited, Weighted-Average Exercise Price   38.05 38.05    
Stock Options Outstanding, ending balance, Weighted-Average Exercise Price 36.41 $ 36.72 $ 37.61 $ 37.87  
Exercisable, Weighted Average Exercise Price $ 36.41        
Stock Options Outstanding, Weighted-Average Remaining Contractual Term 2 years 8 months 4 days 2 years 7 months 6 days 3 years 2 months 12 days 3 years 6 months 3 days  
Exercisable, Weighted-Average Remaining Contractual Term 2 years 8 months 4 days        
Outstanding, Aggregate Intrinsic Value $ 8,212 $ 10,375 $ 11,815 $ 5,172  
Exercisable, Aggregate Intrinsic Value $ 8,212        
Stock Appreciation Rights (SARs)          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock Options Outstanding, beginning balance, Shares 55,600 171,600 554,250    
Granted, Shares 0 0 0 0 0
Exercised, Shares (40,850) (116,000) (342,150)    
Forfeited, Shares     (40,500)    
Stock Options Outstanding, ending balance, Shares 14,750 55,600 171,600 554,250  
Exercisable, Ending Balance 14,750        
Stock Options Outstanding, beginning balance, Weighted-Average Exercise Price $ 41.15 $ 40.60 $ 39.41    
Exercised, Weighted-Average Exercise Price 42.27 40.34 38.22    
Forfeited, Weighted-Average Exercise Price     44.39    
Stock Options Outstanding, ending balance, Weighted-Average Exercise Price 38.05 $ 41.15 $ 40.60 $ 39.41  
Exercisable, Weighted Average Exercise Price $ 38.05        
Stock Options Outstanding, Weighted-Average Remaining Contractual Term 1 year 1 month 24 days 1 year 3 months 10 days 2 years 5 months 8 days 2 years 10 months 2 days  
Exercisable, Weighted-Average Remaining Contractual Term 1 year 1 month 24 days        
Outstanding, Aggregate Intrinsic Value $ 402 $ 2,544 $ 4,224 $ 2,981  
Exercisable, Aggregate Intrinsic Value $ 402