Valuation Technique and Inputs Used to Determine Fair Value of Assets or Liabilities (Detail)	3 Months Ended
	Mar. 30, 2014
Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration, weighted average	6.00%
Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration, weighted average	35.00%
Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	1.00%
Minimum | Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	0.00%
Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	10.00%
Maximum | Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	100.00%