Warranties (Tables)

6 Months Ended

Jun. 30, 2015

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Three months ended						Six months ended
	June 30, 2015			June 30, 2014			June 30, 2015			June 30, 2014
Warranty accrual:	(in thousands)
Balance, beginning of period	$	8,105		$	7,448		$	8,130		$	7,352
Payments made	(1,117		)	(1,242		)	(2,003		)	(2,135		)
Provisions	1,104			1,569			1,965			2,558
Balance, end of period	$	8,092		$	7,775		$	8,092		$	7,775
Warranty expense:	$	1,104		$	1,569		$	1,965		$	2,558