SEC Schedule, Article 12-09, Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Allowance, Credit Loss
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 20,219	$ 5,768	$ 3,311
Charged to Costs and Expenses	7,137	14,882	781
Charged to Other Accounts	(5,866)	(431)	1,676
Write-off/ Disposals	0	0	0
Balance at End of Period	21,490	20,219	5,768
SEC Schedule, 12-09, Reserve, Warranty
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	6,377	6,752	1,726
Charged to Costs and Expenses	(3,609)	83	2,445
Charged to Other Accounts	(61)	(458)	2,581
Write-off/ Disposals	0	0	0
Balance at End of Period	2,707	6,377	6,752
SEC Schedule, 12-09, Reserve, Warranty-Inventory
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	(3,477)	(2,538)	503
Charged to Costs and Expenses	2,033	(217)	(2,908)
Charged to Other Accounts	(169)	(722)	(133)
Write-off/ Disposals	0	0	0
Balance at End of Period	(1,613)	(3,477)	(2,538)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	3,677	5,436	7,385
Charged to Costs and Expenses	0	0	0
Charged to Other Accounts	214	(1,584)	0
Write-off/ Disposals	0	(175)	(1,949)
Balance at End of Period	$ 3,891	$ 3,677	$ 5,436