Leases (Future Minimum Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Ground Leases
2019	$ 818
2020	3,175
2021	2,959
2022	2,672
2023	2,614
Thereafter	202,604
Total minimum payments	214,842
Discount	(155,027)
Lease liability	59,815
2019		$ 2,441
2020		2,460
2021		2,497
2022		2,497
2023		2,497
Thereafter		202,603
Total minimum payments	333	214,995
Finance Ground Leases
2019	462
2020	462
2021	6,562
2022	162
2023	162
Thereafter	3,838
Total minimum payments	11,648
Discount	(1,572)
Lease liability	$ 10,076
2019		462
2020		462
2021		6,562
2022		162
2023		162
Thereafter		3,838
Total minimum payments		$ 11,648