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Stock-Based Compensation (Detail) - USD ($)
1 Months Ended 12 Months Ended
Jan. 03, 2017
Aug. 08, 2016
Jul. 03, 2012
Feb. 08, 2012
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation         $ 5,000 $ 10,510,000 $ 2,978,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value         $ 16,983,000 $ 12,433,000 $ 6,351,000
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period         322,022 455,528 537,276
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable During Period Weighted Average Exercise Price (in Dollars per share)         $ 32.37 $ 27.27 $ 21.19
Share Based Compensation Arrangement By Share-Based Payment Award Equity Options Nonvested Number         596,982    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized         $ 3,276,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition         1 year 6 months    
Employee Service Share Based Compensation Nonvested Restricted Stock Awards Total Compensation Cost Not Yet Recognized         $ 69,606,000    
Employee Service Share Based Compensation Nonvested Restricted Awards Total Compensation Cost Not Yet Recognized Period For Recognition         5 years 11 months    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value         $ 9,758,000 $ 6,980 $ 8,317
Related Party Transaction Restricted Shares Granted During The Period     1,893,342 1,463,057      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 100,000 150,000     262,000 69,000 489,500
Common Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share Price $ 35.75 $ 34.42 $ 21.13 $ 27.34