Revenue Recognition Movement in Standard Product Warranty Accrual (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Product Warranty Liability [Line Items]
Contract with Customer, Right to Recover Product	$ 61,000	$ 52,000
Contract with Customer, Refund Liability	106,000	97,000
Revenue, Variable Consideration Reserve	103,000	108,000
Deferred Service-Type Warranty Revenue	25,869	$ 27,067
Deferred Revenue, Additions	32,310
Deferred Revenue, Revenue Recognized	$ 33,508
Minimum [Member]
Product Warranty Liability [Line Items]
Standard Product Warranty Period	6 months
Maximum
Product Warranty Liability [Line Items]
Standard Product Warranty Period	36 months