Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8
Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
New Accounting Pronouncement, Early Adoption [Line Items]      
Noncontrolling interest owned by the subsidiary 20.00%    
Shipping and handling costs included in net sales $ 6.9 $ 4.8 $ 2.7
Cost of shipping and handling included in selling, general and administrative expenses 47.7 54.6 49.7
Advertising expenses 44.5 54.4 39.6
Employees benefit plan 2.1 2.1 2.1
Valuation allowances related to net deferred tax assets $ 7.0 $ 7.3  
Class A Common Stock [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
401(k) matching contributions made in Class A common stock 229,000 230,000 190,000
Building [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
Useful life 30 years    
Maximum [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
Maturity period of debt instruments 3 months    
Maturity date of investments 1 year    
Maximum [Member] | Equipment And Capitalized Software [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
Useful life 10 years    
Minimum [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
Maturity date of investments 3 months    
Minimum [Member] | Equipment And Capitalized Software [Member]
     
New Accounting Pronouncement, Early Adoption [Line Items]      
Useful life 3 years