Stock-Based Compensation Expense (Detail)			3 Months Ended		6 Months Ended
		Jul. 06, 2015 USD ($) shares	Jul. 05, 2015 USD ($) group $ / shares shares	Jun. 29, 2014 USD ($) $ / shares	Jul. 05, 2015 USD ($) group $ / shares shares	Jun. 29, 2014 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield			1.25%	0.00%	1.25%	0.00%
Groups within the employee population | group			2		2
Percentage of stock options granted to senior management			74.00%		74.00%
Percentage of stock options granted to all other employees			73.00%		73.00%
Estimated annual forfeiture rate			10.00%		10.00%
Estimated annual forfeiture rate for unvested options			11.00%		11.00%
Increase (decrease) to compensation expense			$ 461,000	$ 288,000
Weighted-average grant-date fair values, in dollars per share | $ / shares			$ 14.40	$ 15.28	$ 14.34	$ 15.34
Total intrinsic value			$ 22,490,000	$ 5,710,000	$ 39,230,000	$ 14,643,000
Total fair values of stock options vest			897,000	2,621,000	14,419,000	10,982,000
Unrecognized compensation expense			26,785,000		$ 26,785,000
Weighted average period to be recognized					1 year 10 months 28 days
Stock-based compensation expense			4,631,000	3,956,000	$ 11,577,000	7,960,000
Tax benefit from compensation expense			1,532,000	$ 1,266,000	3,869,000	$ 2,572,000
Recognized period costs capitalized			$ 0		$ 0
Accelerated vesting of options (in shares) | shares	[1]		6,140,000		6,140,000
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			7,815,489		7,815,489
Expiration period from grant day					10 years
Discontinued Operations, Held-for-sale
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 1,105,000
Accelerated vesting of options (in shares) | shares		171,000

[1] In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.