Warranties (Tables)

9 Months Ended

Sep. 30, 2019

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Three months ended				Nine months ended
	September 30, 2019		September 30, 2018		September 30, 2019		September 30, 2018
Warranty accrual:	(in thousands)
Balance, beginning of period	$	11,666	$	11,458	$	11,421	$	10,483
Payments made	(2,023)		(2,355)		(5,200)		(6,078)
Provisions	2,707		3,050		6,129		7,748
Balance, end of period	$	12,350	$	12,153	$	12,350	$	12,153
Warranty expense:	$	2,707	$	3,050	$	6,129	$	7,748