Restricted Stock and Performance-Based Restricted Stock Activity Related to Equity Incentive Plans (Detail) (USD $)	12 Months Ended
	Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock, Nonvested Shares at beginning of period	627,176
Restricted Stock, Nonvested Shares granted	130,310	[1]
Restricted Stock, Nonvested Shares cancelled	(23,189)
Restricted Stock, Nonvested Shares vested	(303,530)
Restricted Stock, Nonvested Shares at end of period	430,767
Weighted Average Grant Date Fair Value at beginning of period	$ 23.41
Weighted Average Grant Date Fair Value, granted	$ 72.56	[1]
Weighted Average Grant Date Fair Value, cancelled	$ 49.78
Weighted Average Grant Date Fair Value, vested	$ 35.40
Weighted Average Grant Date Fair Value at end of period	$ 54.79

[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.