Changes in Carrying Amount of Service and Product Warranties (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Product Liability Contingency [Line Items]
Balance at beginning of the year	$ 30,050	$ 24,288
Service and product warranty provision	50,096	56,553
Payments	(53,937)	(50,729)
Acquired	3,575
Translation	(429)	(62)
Balance at end of the period	$ 29,355	$ 30,050