Leases - Schedule of Lease Costs of Operating Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating lease cost	$ 23,539
Short-term lease cost	1,733
Variable lease cost	3,000
Total lease cost	28,272
Real Estate Lease
Lessee Lease Description [Line Items]
Operating lease cost	13,158
Short-term lease cost	1,733
Variable lease cost	1,363
Total lease cost	16,254
Express Drive Partner Program
Lessee Lease Description [Line Items]
Operating lease cost	10,381
Variable lease cost	1,637
Total lease cost	$ 12,018