Summary of Changes in Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Allowance for Doubtful Accounts		Dec. 31, 2011 Allowance for Doubtful Accounts		Dec. 31, 2010 Allowance for Doubtful Accounts		Dec. 31, 2012 Other Reserves	Dec. 31, 2011 Other Reserves	Dec. 31, 2010 Other Reserves	Dec. 31, 2009 Other Reserves
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance of Beginning of Period	$ 7,959		$ 6,930		$ 11,453		$ 11,195	$ 11,114	$ 7,797	$ 6,599
Charges to Earnings	3,479		4,095		360
Charges to Other Accounts	585	[1]	120	[1]	(108)	[1]
Deductions	(1,252)		(3,186)		(4,775)
Balance at End of Period	$ 10,771		$ 7,959		$ 6,930		$ 11,195	$ 11,114	$ 7,797	$ 6,599

[1] Charges to other accounts primarily relates to amounts acquired through acquisitions and net translation adjustments.