Warranty Liability - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Product Warranty Liability
Accrued warranty liability	$ 49,716	$ 46,468	$ 46,256	$ 45,398
North America
Product Warranty Liability
Accrued warranty liability	44,300
Product warranty, discount adjustment	$ 3,000
Minimum
Product Warranty Liability
Product warranty, term	1 year
Minimum | North America
Product Warranty Liability
Product warranty discount rate (percentage)	0.76%
Maximum
Product Warranty Liability
Product warranty, term	10 years
Maximum | North America
Product Warranty Liability
Product warranty discount rate (percentage)	4.75%