Product Warranties

3 Months Ended

Mar. 31, 2012

6.	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
	March 31, 2012			April 2, 2011
Balance at beginning of period	$	30,144			37,265
Warranty claims paid during the period		(13,920	)		(13,735	)
Pre-existing warranty accrual adjustment during the period		—			2,995
Warranty expense during the period		16,456			9,912

Balance at end of period	$	32,680			36,437