Financial Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents		$ 40,005
Bonds - foreign government		880
Investments in marketable securities	4,785	4,189
Derivative assets	1,279	204
Derivative liabilities	598	633
Contingent consideration liabilities	51,196	9,676
Quoted Prices In Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents		40,005
Bonds - foreign government		880
Investments in marketable securities	4,785	4,189
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	1,279	204
Derivative liabilities	598	633
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Contingent consideration liabilities	$ 51,196	$ 9,676