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Product Warranties (Tables)
 3 Months Ended
Mar. 31, 2019
Product Warranties Disclosures [Abstract]  
Summary of Changes in Product Warranties Reserve
The following table reflects the changes in our Warranty Reserve during the three months ended March 31, 2019 and 2018:
 
 
Three Months Ended March 31,
 
 
2019
 
2018
Warranty reserve, beginning of period
 
$
103,700

 
$
94,513

Provision
 
11,823

 
11,527

Payments
 
(12,671
)
 
(10,434
)
Warranty reserve, end of period
 
$
102,852

 
$
95,606