Warranties (Tables)

3 Months Ended

Mar. 31, 2021

Guarantees [Abstract]

Warranty

Changes in the warranty accrual are as follows:

	Three Months Ended
	March 31, 2021		March 31, 2020
Warranty accrual:	(in thousands)
Balance, beginning of period	$	13,522	$	12,652
Payments made	(1,464)		(1,177)
Provisions	1,467		1,465
Balance, end of period	$	13,525	$	12,940
Warranty expense:	$	1,467	$	1,465