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Product Warranties
 12 Months Ended
Dec. 31, 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.
Product warranties are as follows:
 
2014
 
2013
 
2012
Balance at beginning of year
$
35,818

 
32,930

 
30,144

Acquisitions
—

 
3,389

 
—

Warranty claims paid during the period
(51,941
)
 
(52,011
)
 
(55,314
)
Pre-existing warranty accrual adjustments during the year
—

 
—

 
—

Warranty expense during the period
45,473

 
51,510

 
58,100

Balance at end of year
$
29,350

 
35,818

 
32,930