Balance Sheet Components Valuation And Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Schedule Of Balance Sheet Components [Line Items]
Beginning balance January 1	$ 5,860	[1]	$ 5,322	[1]	$ 6,160	[1]
Charged to costs and expenses, net of recoveries	653	[1]	1,044	[1]	945	[1]
Utilization	(1,151)	[1]	(917)	[1]	(1,879)	[1]
Currency translation and other	234	[1]	411	[1]	96	[1]
Ending balance December 31	$ 5,596	[1]	$ 5,860	[1]	$ 5,322	[1]

[1] Includes provision for doubtful accounts, sales returns and sales discounts granted to customers.