Leases - Lease Obligations (Details) $ in Thousands	Sep. 30, 2017 USD ($)
Minimum Rental Revenues
2017 (Remainder)	$ 37,492
2018	158,612
2019	153,722
2020	141,485
2021	125,794
Thereafter	666,865
Total	1,283,970
Minimum Rental Payments
2017 (Remainder)	1,144
2018	4,478
2019	4,488
2020	4,283
2021	4,240
Thereafter	189,051
Total	$ 207,684