Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012
Assets:
Assets measured at fair value on a recurring basis	$ 12,405
Liabilities:
Liabilities measured at fair value on a recurring basis	127,852
Money market funds [Member]
Assets:
Assets measured at fair value on a recurring basis	315
Equity security [Member]
Assets:
Assets measured at fair value on a recurring basis	5,472
Mutual funds [Member]
Assets:
Assets measured at fair value on a recurring basis	6,618
Deferred compensation liabilities [Member]
Liabilities:
Liabilities measured at fair value on a recurring basis	34,852
Contingent consideration [Member]
Liabilities:
Liabilities measured at fair value on a recurring basis	93,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Assets measured at fair value on a recurring basis	12,405
Liabilities:
Liabilities measured at fair value on a recurring basis	34,852
Quoted Prices in Active Markets 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 Markets for Identical Assets (Level 1) [Member] | Equity security [Member]
Assets:
Assets measured at fair value on a recurring basis	5,472
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mutual funds [Member]
Assets:
Assets measured at fair value on a recurring basis	6,618
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Deferred compensation liabilities [Member]
Liabilities:
Liabilities measured at fair value on a recurring basis	34,852
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 security [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	93,000
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 security [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	$ 93,000