Valuation And Qualifying Accounts (Detail) (Allowance for doubtful accounts receivable, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for doubtful accounts receivable
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 5,934		$ 6,225		$ 6,738
Charged to costs and expenses	774		596		463
Charged to other accounts
Cumulative translation adjustment	179		(267)		(236)
Other	(1,018)	[1]	(620)	[1]	(740)	[1]
Balance at end of period	$ 5,869		$ 5,934		$ 6,225

[1] Uncollectible accounts written off, net of recoveries.