Product warranties

9 Months Ended

Sep. 27, 2014

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 27, 2014			September 28, 2013		September 27, 2014		September 28, 2013
Balance at beginning of period	$	32,236		33,674		35,818		32,930
Warranty claims paid during the period	(11,720		)	(12,144	)	(41,606	)	(41,751	)
Acquisitions	—			48		—		3,331
Warranty expense during the period	10,487			11,989		36,791		39,057
Balance at end of period	$	31,003		33,567		31,003		33,567