Leases - Leases under ASC 840 (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Leases [Abstract]
Gross Rents, 2018	$ 13,731
Gross Rents, 2019	27,640
Gross Rents, 2020	27,785
Gross Rents, 2021	26,955
Gross Rents, 2022	25,948
Gross Rents, Thereafter	271,054
Gross Rents, Total Lease Payments	393,113
Sublease Income, 2018	1,092
Sublease Income, 2019	2,124
Sublease Income, 2020	2,077
Sublease Income, 2021	2,009
Sublease Income, 2022	1,891
Sublease Income, Thereafter	8,130
Sublease Income, Total Lease Payments	17,323
Net Rents, 2018	12,639
Net Rents, 2019	25,516
Net Rents, 2020	25,708
Net Rents, 2021	24,946
Net Rents, 2022	24,057
Net Rents, Thereafter	262,924
Net Rents, Total Lease Payments	$ 375,790