Derivative Financial Instruments - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Mar. 28, 2012	Jul. 18, 2015	Jul. 18, 2015	Jul. 12, 2014	Jan. 03, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlement on hedge			$ 3,100,000
Hedge ineffectiveness		$ 0		$ 0
Current assets representing collateral for hedged positions
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instrument, asset		$ 10,500,000	$ 10,500,000		$ 16,100,000
4.375% Senior Notes
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument term	10 years		10 years
Recognized after debt issuance
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlement on hedge, net of tax	$ 600,000
Amortized over remaining term of senior notes
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlement on hedge, net of tax			$ 1,500,000
Cash settlement on hedge			$ 2,500,000