Stock-Based Compensation Expense (Detail)	3 Months Ended
	Mar. 31, 2019 USD ($) group $ / shares shares	Apr. 01, 2018 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, performance-based restricted stock, years	1 year
Vesting period, time-based restricted stock, years	3 years
Groups within the employee population | group	2
Estimated annual forfeiture rate for unvested options for senior management	9.00%
Estimated annual forfeiture rate for unvested options for all other employees	12.00%
Increase (decrease) to compensation expense	$ 499,000	$ 1,283,000
Weighted-average grant-date fair values, in dollars per share | $ / shares	$ 18.59	$ 21.62
Total intrinsic value	$ 22,579,000	$ 28,088,000
Total fair values of stock options vest	29,972,000	25,674,000
Unrecognized compensation expense	$ 75,985,000
Weighted average period to be recognized	2 years 1 month 21 days
Stock-based compensation expense	$ 12,281,000	13,194,000
Tax benefit from compensation expense	2,222,000	$ 2,347,000
Recognized period costs capitalized	$ 0
General Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for stock option plans	4 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans | shares	16,956,452
Expiration period from grant day	10 years