Leases - Schedule of Minimum Lease Payments and Sublease Income (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
Year 1	$ 180,166
Year 2	169,420
Year 3	159,952
Year 4	151,139
Year 5	140,294
Thereafter	651,535
Total lease payments	1,452,506
Less: interest and inflation	(483,401)
Present value of lease liabilities	969,105
Finance Leases
Year 1	5,783
Year 2	4,709
Year 3	4,155
Year 4	3,958
Year 5	3,147
Thereafter	14,138
Total lease payments	35,890
Less: interest and inflation	(10,422)
Present value of lease liabilities	$ 25,468