Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended			0 Months Ended	12 Months Ended
	May 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014 Revolving Credit Facility	May 28, 2013 Post-judgment Interest	Dec. 31, 2007 Damage Award	Mar. 31, 2007 Damage Award	Sep. 27, 2014 Guarantee Payment Of Insurance Claims	Sep. 27, 2014 Current Investments	Sep. 27, 2014 Non-Current Investments
Commitments and Contingencies Disclosure [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims											$ 32,685,000	$ 35,318,000
Cash equivalents providing collateral for letters of credit to guarantee insurance claims											4,979,000
Total non-current investments												70,805,000
Letters of credit outstanding						33,045,000				66,182,000
Aggregate damage awarded	55,200,000
Post-judgment interest rate							6.25%
Retained liability of self-insurance program									5,000,000
Operating insurance and claims costs, production		$ 12,026,000	$ 13,335,000	$ 37,732,000	$ 36,907,000			$ 5,000,000