Lessee Lease Terms (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Lessee Leases [Line Items]
Ground Leases Terms Minimum	35 years
Ground Leases Terms Maximum	52 years
Operating Lease Expense	$ 927
Weighted Average Remaining Lease Term	34 years 3 months 18 days
Weighted Average Discount Rate	7.40%
Minimum
Lessee Leases [Line Items]
Lessee, Remaining Lease Terms for Office Leases	1 year
Maximum
Lessee Leases [Line Items]
Lessee, Remaining Lease Terms for Office Leases	7 years