10. Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

Product warranty activities during the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Product warranty liability, beginning of period	$	91,058	$	123,194	$	95,096	$	129,797
Accruals for new warranties issued	1,680		3,435		8,397		7,903
Settlements	(1,091)		(9,289)		(6,730)		(18,772)
Changes in estimate of product warranty liability	(33,106)		(19,987)		(38,222)		(21,575)
Product warranty liability, end of period	$	58,541	$	97,353	$	58,541	$	97,353
Current portion of warranty liability	$	16,752	$	22,325	$	16,752	$	22,325
Noncurrent portion of warranty liability	$	41,789	$	75,028	$	41,789	$	75,028