Leases (Future Minimum Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating Ground Leases
2020	$ 3,175
2021	2,959
2022	2,672
2023	2,614
2024	2,497
Thereafter	200,107
Total minimum payments	214,024
Discount	(154,645)
Lease liability	59,379
2019		$ 2,441
2020		2,460
2021		2,497
2022		2,497
2023		2,497
Thereafter		202,603
Total minimum payments		214,995
Finance Ground Leases
2020	462
2021	6,562
2022	162
2023	162
2024	162
Thereafter	3,676
Total minimum payments	11,186
Discount	(1,456)
Lease liability	$ 9,730
2019		462
2020		462
2021		6,562
2022		162
2023		162
Thereafter		3,838
Total minimum payments		$ 11,648