Financial Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	$ 5,646	$ 4,785
Derivative assets	184	1,279
Derivative liabilities	1,171	598
Contingent consideration liabilities	20,610	51,196
Quoted Prices In Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	5,646	4,785
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	184	1,279
Derivative liabilities	1,171	598
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Contingent consideration liabilities	$ 20,610	$ 51,196