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Product warranties
 3 Months Ended
Mar. 29, 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
 
March 29,
2014
 
March 30,
2013
Balance at beginning of period
$
35,818

 
32,930

Warranty claims paid during the period
(14,024
)
 
(13,301
)
Acquisitions
—

 
2,780

Warranty expense during the period
11,466

 
13,074

Balance at end of period
$
33,260

 
35,483