Product warranties

9 Months Ended

Sep. 29, 2012

Product Warranties Disclosures [Abstract]

Product warranties

Product warranties

The Company warrants certain qualitative attributes of its products for up to 50 years. The Company records a provision for estimated warranty and related costs in accrued expenses, based on historical experience, and periodically adjusts these provisions to reflect actual experience.

The activity related to warranty obligations is as follows:

	Three Months Ended					Nine Months Ended
	September 29, 2012			October 1, 2011		September 29, 2012		October 1, 2011
Balance at beginning of period	$	34,867		32,052		30,144		37,265
Warranty claims paid during the period	(15,166		)	(13,247	)	(43,952	)	(43,994	)
Pre-existing warranty accrual adjustment during the period	—			300		—		3,784
Warranty expense during the period	14,748			10,140		48,257		32,190
Balance at end of period	$	34,449		29,245		34,449		29,245