Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2019
USD ($)
item
|
Mar. 31, 2018
USD ($)
|
|
| Lessee, Lease, Description [Line Items] | ||
| Ground lease expense incurred | $ 629,651 | $ 550,000 |
| Operating lease | $ 22,500,000 | |
| Number of ground leases | item | 5 | |
| Minimum [Member] | ||
| Lessee, Lease, Description [Line Items] | ||
| Term of lease contract | 6 years 3 months | |
| Borrowing rate | 5.637% | |
| Maximum [Member] | ||
| Lessee, Lease, Description [Line Items] | ||
| Term of lease contract | 82 years 6 months 29 days | |
| Borrowing rate | 7.618% | |