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Liability for Warranty Returns (Tables)
3 Months Ended
Mar. 31, 2018
Product Warranties Disclosures [Abstract]  
Summary of Warranty Expense and Write-Off Activity

A summary of warranty expense and write-off activity for the three months ended March 31, 2018 and 2017 is as follows:

 

 

 

Three Months Ended

 

 

 

March 31,

 

(In thousands)

 

2018

 

 

2017

 

Balance at beginning of period

 

$

9,724

 

 

$

8,548

 

Plus: Amounts charged to cost and expenses

 

 

1,822

 

 

 

(741

)

Less: Deductions

 

 

(1,859

)

 

 

1,181

 

Balance at end of period

 

$

9,687

 

 

$

8,988