Derivative Instruments Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative assets	$ 2,165		$ 710
Derivative liabilities	729		752
Derivatives designated as cash flow hedging instruments under ASC 815 [Member] | Foreign currency forward and option contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,125	[1]	704	[1]
Derivatives designated as cash flow hedging instruments under ASC 815 [Member] | Foreign currency forward and option contracts [Member] | Other accrued expenses and current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	704	[2]	485	[2]
Derivatives not designated as hedging instruments under ASC 815 [Member] | Foreign currency forward contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	40	[1]	6	[1]
Derivatives not designated as hedging instruments under ASC 815 [Member] | Foreign currency forward contracts [Member] | Other accrued expenses and current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 25	[2]	$ 267	[2]

[1] Included in "Other current assets" in the accompanying Condensed Consolidated Balance Sheets.

[2] Included in "Other accrued expenses and current liabilities" in the accompanying Condensed Consolidated Balance Sheets.