Liability for Warranty Returns (Tables)

9 Months Ended

Sep. 30, 2017

Product Warranties Disclosures [Abstract]

Summary of Warranty Expense and Write-Off Activity

A summary of warranty expense and write-off activity for the three and nine months ended September 30, 2017 and 2016 is as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2017			2016			2017			2016
Balance at beginning of period	$	9,180		$	8,935		$	8,548		$	8,739
Plus: Amounts charged to cost and expenses		4,087			4,012			6,401			6,341
Less: Deductions		(2,328	)		(4,195	)		(4,010	)		(6,328	)
Balance at end of period	$	10,939		$	8,752		$	10,939		$	8,752