Warranties (Tables)

9 Months Ended

Sep. 30, 2021

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Warranty accrual:	(in thousands)
Balance, beginning of period	$	14,008	$	13,160	$	13,522	$	12,652
Payments made	(1,825)		(1,687)		(4,834)		(4,481)
Provisions	1,272		2,054		4,767		5,356
Balance, end of period	$	13,455	$	13,527	$	13,455	$	13,527
Warranty expense:	$	1,272	$	2,054	$	4,767	$	5,356