Leases - Schedule of Lease Position (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Jan. 01, 2019
Lessee Lease Description [Line Items]
Total operating lease right-of-use assets		$ 347,027	$ 285,600
Total current operating lease liabilities		92,458
Total noncurrent operating lease liabilities		295,164
Total operating lease liabilities		387,622	$ 314,100
Real Estate Lease
Lessee Lease Description [Line Items]
Total operating lease right-of-use assets		236,377
Total current operating lease liabilities		36,538
Total noncurrent operating lease liabilities		231,262
Total operating lease liabilities		$ 267,800
Weighted-average remaining lease term		6 years 3 months 18 days
Weighted-average discount rate	[1]	6.80%
Express Drive Partner Program
Lessee Lease Description [Line Items]
Total operating lease right-of-use assets		$ 110,650
Total current operating lease liabilities		55,920
Total noncurrent operating lease liabilities		63,902
Total operating lease liabilities		$ 119,822
Weighted-average remaining lease term		2 years
Weighted-average discount rate	[1]	6.50%

[1] Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019.