Leases Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease charges	$ 41,525	$ 78,543
Sublease receipts	$ (1,818)	(3,494)
Cash paid for amounts included in measurement of operating lease liabilities		61,333
Cash paid for short-term operating leases not included in operating lease liabilities		14,451
Right-of-use assets obtained in exchange for new operating lease liabilities		$ 10,540
Weighted-average discount rate	8.00%	8.00%
Weighted-average remaining lease term		3 years
2019	$ 61,288	$ 61,288
2020	104,264	104,264
2021	72,264	72,264
2022	43,637	43,637
2023	19,536	19,536
Thereafter	5,893	5,893
Total undiscounted operating lease liabilities	306,882	306,882
Less: Interest	(35,247)	(35,247)
Operating lease liabilities	271,635	271,635	$ 0
2019			145,345
2020			116,785
2021			80,362
2022			47,417
2023			16,460
Thereafter			2,280
Total future minimum rental payments			$ 408,649
Other store expenses [Member]
Lessee, Lease, Description [Line Items]
Operating lease charges	38,232	74,785
Other charges [Member]
Lessee, Lease, Description [Line Items]
Operating lease charges	$ 5,111	$ 7,252