Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Detail)

v2.4.0.8
Fair Value Measurements - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill impairment $ 7,709,000 $ 0 $ 7,709,000 $ 0
Senior Subordinated Notes [Member]
       
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Senior subordinated notes due date   Mar. 01, 2018    
Obligation to pay principle on the Company senior subordinates notes   450,000,000    
Senior subordinated notes, percentage   8.25%    
Senior Subordinated Notes [Member] | Portion at Fair Value, Fair Value Disclosure [Member]
       
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Estimated fair value of senior subordinated notes due 2018   459,500,000    
Senior Subordinated Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
       
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying value of senior subordinated notes   $ 449,500,000