Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Commitments And Contingencies [Abstract] | |||
| Ground lease expense incurred | $ 2.3 | $ 2.6 | $ 1.5 |
| X | ||||||||||
- Definition Operating Lease, Expense, Including Sublease Rentals No definition available.
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| X | ||||||||||
- References No definition available.
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