Leases - Schedule of Lease Position (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Jan. 01, 2019
Assets
Operating lease right of use assets		$ 304,605	$ 285,600
Current
Operating lease liabilities — current		73,676
Noncurrent
Operating lease liabilities		263,755
Total operating lease liabilities		337,431	$ 314,100
Real Estate Lease
Assets
Operating lease right of use assets		218,784
Current
Operating lease liabilities — current		32,031
Noncurrent
Operating lease liabilities		214,248
Total operating lease liabilities		$ 246,279
Weighted-average remaining lease term (years)
Weighted-average remaining lease term		6 years 8 months 12 days
Weighted-average discount rate
Weighted-average discount rate	[1]	6.80%
Express Drive Partner Program
Assets
Operating lease right of use assets		$ 85,821
Current
Operating lease liabilities — current		41,645
Noncurrent
Operating lease liabilities		49,507
Total operating lease liabilities		$ 91,152
Weighted-average remaining lease term (years)
Weighted-average remaining lease term		2 years
Weighted-average discount rate
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.