Leases - Maturity ASC 842 (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Leases
2019	$ 152,768
2020	307,826
2021	291,491
2022	288,319
2023	284,399
Thereafter	783,498
Total lease payments	2,108,301
Imputed interest and variable lease payments	(581,835)
Total lease obligations	1,526,466
Financing Leases
2019	44,087
2020	89,003
2021	90,243
2022	91,633
2023	93,104
Thereafter	428,952
Total lease payments	837,022
Purchase option liability and non-cash gain on future sale of property	575,531
Imputed interest and variable lease payments	(548,966)
Total lease obligations	$ 863,587