Changes in Product Warranty Reserve (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Disclosure Changes In Product Warranty Reserve [Abstract]
Balance at beginning of period	$ 60,593	$ 58,212
Warranty expense	22,104	18,677
Acquisitions	3,567	2,244
Warranty claim payments	(14,572)	(16,740)
Foreign currency impact/other	(980)	(109)
Balance at end of period	$ 70,712	$ 62,284