Summarize Impact of ASC 606 to Condensed Consolidated Statement of Operation (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 487,467	$ 456,913
Total cost of revenues	217,635	191,897
Income tax provision	8,846	6,795
Net income	$ 86,974	$ 85,221
Net income per common share:
Basic	$ 0.45	$ 0.43
Diluted	$ 0.43	$ 0.42
ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 483,200
ASU 2014-09 | Adjustments to Recognize under Legacy GAAP
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	(65,642)
Total cost of revenues	(27,749)
Income tax provision	(4,515)
Net income	$ (33,378)
Net income per common share:
Basic	$ (0.17)
Diluted	$ (0.16)
ASU 2014-09 | Legacy GAAP
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 421,825
Total cost of revenues	189,886
Income tax provision	4,331
Net income	$ 53,596
Net income per common share:
Basic	$ 0.27
Diluted	$ 0.26