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Revenue - Retail Installment Contract Receivables Contract Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Capitalized Contract Cost [Line Items]
Contract With Customer, Asset Recognized			$ 22,000	$ 125,000
Revenue recognized	$ 41,000	$ 30,000	77,888	$ 59,017
Retail Installment Contract
Capitalized Contract Cost [Line Items]
Financing Receivable, before Allowance for Credit Loss	230,517		230,517		$ 145,957
Financing Receivable, Allowance for Credit Loss	1,962		1,962		4,366
Retail installment contract receivable, carrying amount	228,555		228,555		141,591
Retail Installment Contract | Accounts receivable, net
Capitalized Contract Cost [Line Items]
Retail installment contract receivable, carrying amount	68,926		68,926		47,023
Retail Installment Contract | Other assets
Capitalized Contract Cost [Line Items]
Retail installment contract receivable, carrying amount	$ 159,629		$ 159,629		$ 94,568

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