Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended				1 Months Ended	12 Months Ended			1 Months Ended
	May 28, 2013	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 29, 2012	Jun. 29, 2013 Credit Agreement	May 28, 2013 Damage Award	Dec. 31, 2007 Damage Award	Jun. 29, 2013 Damage Award	Mar. 31, 2007 Damage Award	May 28, 2013 Prejudgment Interest	May 28, 2013 Attorney Fees and Post-judgment Interest	Jun. 29, 2013 Guarantee Payment Of Insurance Claims	Jun. 29, 2013 Current Investments	Jun. 29, 2013 Non-Current Investments
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims															$ 34,560,000	$ 22,047,000
Total non-current investments																67,157,000
Letters of credit outstanding							34,752,000							50,946,000
Aggregate damage awarded	55,200,000							40,200,000				1,000,000	14,000,000
Post-judgment interest rate													6.25%
Operating insurance and claims costs, production		11,848,000	9,306,000	23,654,000	20,401,000				5,000,000
Retained liability of self-insurance program											5,000,000
Other receivables		$ 56,483,000		$ 56,483,000		$ 55,278,000				$ 38,700,000