Leases Future Minimum Rent (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Operating Leased Assets
Rental payments, Capital leases, 2018	$ 12,967
Rental payments, Capital leases, 2019	45,323
Rental payments, Capital leases, 2020	46,252
Rental payments, Capital leases, 2021	47,849
Rental payments, Capital leases, 2022	48,937
Rental payments, Capital leases, Thereafter	751,317
Rental payments, Capital leases, Total minimum payments	952,645
Less interest	(494,298)
Present value of minimum capital lease payments	458,347
Rental payments, Operating leases, 2018	25,217
Rental payments, Operating leases, 2019	95,216
Rental payments, Operating leases, 2020	94,079
Rental payments, Operating leases, 2021	93,580
Rental payments, Operating leases, 2022	93,304
Rental payments, Operating leases, Thereafter	1,145,074
Rental payments, Operating leases, Total minimum payments	1,546,470
Rental receipts, Capital leases, 2018	16,007
Rental receipts, Capital leases, 2019	64,376
Rental receipts, Capital leases, 2020	65,467
Rental receipts, Capital leases, 2021	67,267
Rental receipts, Capital leases, 2022	68,451
Rental receipts, Capital leases, Thereafter	1,034,322
Rental receipts, Capital leases, Total minimum payments	1,315,890
Rental receipts, Operating leases, 2018	18,911
Rental receipts, Operating leases, 2019	76,044
Rental receipts, Operating leases, 2020	75,810
Rental receipts, Operating leases, 2021	75,771
Rental receipts, Operating leases, 2022	76,222
Rental receipts, Operating leases, Thereafter	935,083
Rental receipts, Operating leases, Total minimum payments	1,257,841
Rental receipts, Owned properties, 2018	13,488
Rental receipts, Owned properties, 2019	54,736
Rental receipts, Owned properties, 2020	55,348
Rental receipts, Owned properties, 2021	56,943
Rental receipts, Owned properties, 2022	58,514
Rental receipts, Owned properties, Thereafter	948,620
Rental receipts, Owned properties, Total minimum payments	1,187,649
Current portion of long-term debt
Operating Leased Assets
Capital Lease Obligations, Current	8,041
Long-term Debt
Operating Leased Assets
Capital Lease Obligations, Noncurrent	$ 450,306