Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental cash flow information:
Cash payments for interest, including $1,368, $0, and $382, respectively, to related parties	$ 74,080,000	$ 16,322,000	$ 7,064,000
Cash payments for interest to related parties	1,368,000	0	382,000
Non-cash investing and financing activities:
Capital expenditures financed through long-term debt	0	10,139,000	18,005,000
Capital expenditures included in accounts payable and accrued liabilities	25,367,000	9,384,000	8,619,000
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	58,186,000
Property and equipment acquired under finance leases	35,924,000	16,543,000	0
Equity-based compensation expense capitalized to property and equipment	2,610,000	1,650,000	0
Property and equipment acquired through issuance of Class A common stock	0	536,000	0
Fair value of beneficial interests received in securitization transactions	109,303,000	0	0
Reductions of beneficial interests in securitizations and associated long-term debt	6,760,000	0	0
Dividends on Convertible Preferred Stock included in accrued liabilities	0	0	413,000
Debt issuance costs included in accounts payable and accrued liabilities	0	0	175,000
Conversion of stock, amount converted	0	0	260,411,000
Accrual of return on Class C redeemable preferred units	0	0	9,439,000
Member Units | Car360
Non-cash investing and financing activities:
Issuance of LLC Units related to business acquisitions	0	9,981,000	0
Class A Convertible Preferred Stock
Non-cash investing and financing activities:
Dividends on Convertible Preferred Stock included in accrued liabilities		0
Conversion of stock, amount converted	$ 0	$ 98,507,000	$ 0