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Stock-Based Compensation (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 25, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
May 24, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Treasury Stock Acquired, Average Cost Per Share       $ 32.77    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           11,000,000
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period   77,075 79,901 480,762 566,429  
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable During Period Weighted Average Exercise Price (in Dollars per share)   $ 33.77 $ 25.94 $ 27.68 $ 24.62  
Share Based Compensation Arrangement By Share-Based Payment Award Equity Options Nonvested Number   1,203,775   1,203,775    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition       2 years 4 months 24 days    
Employee Service Share Based Compensation Nonvested Restricted Awards Total Compensation Cost Not Yet Recognized Period For Recognition       4 years 3 months 18 days    
Related Party Transaction Restricted Shares Granted During The Period 200,000          
Employee Stock Option [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   $ 6,088   $ 6,088    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period       675,000    
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   $ 64,058   $ 64,058    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period       4,134,238    
Common Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Treasury Stock Acquired, Average Cost Per Share       $ 32.26