Commitments and Contingencies - Tax Matters - Sales and use tax (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Gain Contingencies [Line Items]
Benefit adjustment due to settlement of sales and use tax audits	$ 12,400	$ 12,400
Tax refund receivable	17,250	17,250
Accrued liabilities	103,296	103,296	$ 67,845
Cost of sales excluding depreciation and amortization
Gain Contingencies [Line Items]
Benefit adjustment due to settlement of sales and use tax audits	4,400	4,400
SG&A
Gain Contingencies [Line Items]
Benefit adjustment due to settlement of sales and use tax audits	7,900	7,900
Sales and Use Tax
Gain Contingencies [Line Items]
Tax refund receivable	17,300	17,300
Accrued liabilities	$ 4,900	$ 4,900