v2.4.0.8
Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2013
Sep. 29, 2012
Assets:    
Assets measured at fair value on a recurring basis $ 24,948 $ 13,339
Liabilities:    
Liabilities measured at fair value on a recurring basis 42,391 118,450
Money Market Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis   315
Equity Securities [Member]
   
Assets:    
Assets measured at fair value on a recurring basis 18,087 6,029
Mutual Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis 6,861 6,995
Deferred Compensation Liabilities [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis 38,611 32,082
Contingent Consideration [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis 3,780 86,368
Quoted Prices in Active Market for Identical Assets (Level 1) [Member]
   
Assets:    
Assets measured at fair value on a recurring basis 24,948 13,339
Liabilities:    
Liabilities measured at fair value on a recurring basis 38,611 32,082
Quoted Prices in Active Market for Identical Assets (Level 1) [Member] | Money Market Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis   315
Quoted Prices in Active Market for Identical Assets (Level 1) [Member] | Equity Securities [Member]
   
Assets:    
Assets measured at fair value on a recurring basis 18,087 6,029
Quoted Prices in Active Market for Identical Assets (Level 1) [Member] | Mutual Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis 6,861 6,995
Quoted Prices in Active Market for Identical Assets (Level 1) [Member] | Deferred Compensation Liabilities [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis 38,611 32,082
Quoted Prices in Active Market for Identical Assets (Level 1) [Member] | Contingent Consideration [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis      
Significant Other Observable Inputs (Level 2) [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Liabilities:    
Liabilities measured at fair value on a recurring basis      
Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis     
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Significant Other Observable Inputs (Level 2) [Member] | Mutual Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Significant Other Observable Inputs (Level 2) [Member] | Deferred Compensation Liabilities [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis      
Significant Other Observable Inputs (Level 2) [Member] | Contingent Consideration [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis      
Significant Unobservable Inputs (Level 3) [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Liabilities:    
Liabilities measured at fair value on a recurring basis 3,780 86,368
Significant Unobservable Inputs (Level 3) [Member] | Money Market Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis     
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds [Member]
   
Assets:    
Assets measured at fair value on a recurring basis      
Significant Unobservable Inputs (Level 3) [Member] | Deferred Compensation Liabilities [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis      
Significant Unobservable Inputs (Level 3) [Member] | Contingent Consideration [Member]
   
Liabilities:    
Liabilities measured at fair value on a recurring basis $ 3,780 $ 86,368