Accrued Warranty Costs (Tables)

3 Months Ended

Mar. 31, 2016

Guarantees [Abstract]

Changes in Product Warranty Obligation (Accrued Warranty Costs)

Changes in our product warranty obligation (accrued warranty costs) are as follows:

	Three Months Ended
	March 31,
	2016			2015
	(In Thousands)
Balance at beginning of period	$	10,551		$	8,817
Amounts charged to SG&A		2,405			2,099
Costs incurred		(2,190	)		(1,882	)
Balance at end of period	$	10,766		$	9,034