Warranties (Tables)

6 Months Ended

Jun. 30, 2019

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Three months ended						Six months ended
	June 30, 2019			June 30, 2018			June 30, 2019			June 30, 2018
Warranty accrual:	(in thousands)
Balance, beginning of period	$	11,424		$	10,788		$	11,421		$	10,483
Payments made	(2,071		)	(2,504		)	(3,177		)	(3,723		)
Provisions	2,313			3,174			3,422			4,698
Balance, end of period	$	11,666		$	11,458		$	11,666		$	11,458
Warranty expense:	$	2,313		$	3,174		$	3,422		$	4,698