Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies - Additional Information 1 (Detail)

v2.4.0.8
Organization and Significant Accounting Policies - Additional Information 1 (Detail) (USD $)
12 Months Ended
Sep. 27, 2014
Companies
Sep. 28, 2013
Sep. 29, 2012
New Accounting Pronouncement, Early Adoption [Line Items]      
Owned percentage in unconsolidated entities 50.00%    
Number of unconsolidated companies 2    
Equity income $ 600,000 $ 900,000 $ 700,000
Investment in unconsolidated companies 600,000 800,000  
Excess loss insurance that covers any health care claims 700,000    
Outstanding derivative instruments 0 0  
Stock-based compensation 7,678,000 15,892,000 7,510,000
Stock-based compensation after tax 4,900,000 10,000,000 4,700,000
Maximum [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
General liability and vehicle liability insurance policies 350,000    
Minimum [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
General liability and vehicle liability insurance policies $ 250,000