Warranties (Tables)

12 Months Ended

Dec. 31, 2020

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Years Ended December 31,
	2020		2019		2018
Warranty accrual:	(in thousands)
Balance, beginning of period	$	12,652	$	11,421	$	10,483
Payments made	(5,751)		(6,816)		(7,869)
Provisions	6,621		8,047		9,669
Change in estimate	—		—		(862)
Balance, end of period	$	13,522	$	12,652	$	11,421
Warranty expense:	$	6,621	$	8,047	$	8,807