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Stock-Based Compensation (Detail) - (Table 1) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
May 22, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]              
Stock-based awards, including restricted stock and stock options granted, net of expired or cancelled     (8,565)        
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period 57 57 195 206      
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable During Period Weighted Average Exercise Price (in Dollars per share) $ 41.26 $ 30.72 $ 34.91 $ 34.95      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,646 2,142 1,646 2,142   1,278 2,111
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock available for grant of stock-based awards as of June 30, 2012 10,435   10,435        
Common stock authorized         19,000    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 200   200        
Share Based Compensation Arrangement By Share-Based Payment Award Equity Options Nonvested Number 213   213        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum     34.10% 40.60%      
Outstanding at June 30, 2012     2 years 10 months 24 days 3 years 4 months 24 days      
Exercisable at June 30, 2012 1,075 893 1,075 893      
Exercisable at June 30, 2012     2 years 7 months 6 days 3 years 1 month 6 days      
Dividend yield     2.00% 2.50%      
Exercised     (54) (1,627)      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares       2      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price     $ 33.64 $ 25.11      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price       $ 46.28      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum     47.40% 48.10%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum     4.00% 3.70%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum     4.60% 4.00%      
Weighted average fair value     $ 13.22 $ 10.95      
Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected life in years     4 years 5 years      
Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected life in years     3 years 3 years      
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 46,666   $ 46,666        
Restricted And Performance Based Stock Awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated Share-based Compensation Expense 6,305 $ 5,351 17,734 $ 16,150      
Employee Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Allocated Share-based Compensation Expense 647 $ 579 1,797 $ 2,019      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 1,981   $ 1,981