Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash paid during the period for:
Interest	$ 94,591	$ 65,202	$ 61,889
Income taxes	17,683	35,432	1,622
Non-cash investing activities:
Derecognized property and equipment for leases that qualified as operating leases after completion of construction	(4,628)		(19,958)
Property and equipment acquired through third party capital lease arrangements			2,007
Leasehold improvements paid by lessor	27,022	4,908
Vehicles transferred to property and equipment from inventory	919	1,555	530
Portion of acquisition purchase price paid through issuance of Class A common stock		5,720
Derecognition of non-tenant improvements	8,134
Capital expenditures in accounts payable and accrued liabilities	8,441	6,721	2,803
Non-cash financing activities:
Derecognized right to use liabilities for leases that qualified as operating leases after completion of construction	(4,900)		(20,056)
Third-party capital lease arrangements to acquire property and equipment			2,007
Non-cash distribution of equity interest in AutoMatch USA, LLC, an indirect wholly-owned subsidiary of the Company			$ (38,838)
Pa value of Class A common stock issued in exchange for common units in CWGS, LLC	3	130
Par value of Class A common stock issued for vested restricted stock units	3
Par value of Class A common stock repurchased for withholding taxes on vested RSUs	$ (1)
Par value of Class A common stock issued for acquisition		$ 1