Leases - Schedule of Lease Costs of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee Lease Description [Line Items]
Operating lease cost	$ 25,275	$ 48,814
Short-term lease cost	2,199	3,932
Variable lease cost	3,296	6,296
Total lease cost	30,770	59,042
Real Estate Lease
Lessee Lease Description [Line Items]
Operating lease cost	13,816	26,974
Short-term lease cost	2,199	3,932
Variable lease cost	1,943	3,306
Total lease cost	17,958	34,212
Express Drive Partner Program
Lessee Lease Description [Line Items]
Operating lease cost	11,459	21,840
Variable lease cost	1,353	2,990
Total lease cost	$ 12,812	$ 24,830