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Equity Incentive Plans - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash compensation expense		$ 22,792	$ 20,713	$ 18,564
Deferred tax benefit related to non-cash compensation expense		$ 4,000	$ 5,200
Stock options outstanding		1,909,399	2,238,114	2,498,310	3,323,476
Total intrinsic value of stock options exercised		$ 91,200	$ 62,000	$ 128,000
Cash received from exercise of stock options		9,832	6,099	15,234
Tax benefit realized from stock options exercised		$ 22,000	$ 23,000	$ 46,100
Restricted stock granted	[1]	91,430	72,250	97,650
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash compensation expense		$ 6,300	$ 6,800	$ 4,900
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 7,800
Weighted average period over which the unrecognized compensation will be recognized		2 years 9 months 18 days
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash compensation expense		$ 14,600	$ 13,100	$ 12,800
Unrecognized compensation cost		$ 27,200
Employees [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted		59,070	67,840	90,730
Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted		3,790	4,410	6,920
2004 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		15,600,000
Number of shares available for grant		2,708,278
Stock options outstanding		1,909,399
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash compensation expense		$ 800	$ 800	$ 900
Restricted Stock Units (RSUs) [Member] | Board of Directors [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		100
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash compensation expense		$ 1,100
Restricted stock granted		28,570
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options		$ 7,000
[1] The weighted average grant date fair value for performance-based restricted shares granted was calculated based on the market price on the grant dates. Certain tranches will ultimately be valued when the performance condition is established for each tranche, which generally occurs in the fourth quarter of each fiscal year.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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