Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid during the period for:
Interest	$ 35,059	$ 55,250
Income taxes	(783)	(1,620)
Non-cash investing activities:
Leasehold improvements paid by lessor	24	10,353
Vehicles transferred to property and equipment from inventory	161	383
Capital expenditures in accounts payable and accrued liabilities	1,372	5,141
Non-cash financing activities:
Par value of Class A common stock issued in exchange for common units in CWGS, LLC	1
Par value of Class A common stock issued for vested restricted stock units	$ 2	$ 1