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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract] |  |  |  |  |
Weighted average remaining lease term | 30 years 4 months 24 days |  |  | 30 years 4 months 24 days |
Weighted average discount rate | 5.70% |  |  | 5.70% |
Rent expense | $ 0.3 |  | $ 0.4 | $ 0.7 | $ 0.9
Percentage of contractual base rents and monthly tenant reimbursements collected |  | 96.00% |  | 97.00% |
Lease rent deferred | $ 3.5 |  |  | $ 3.5 |
Lease rent waived |  |  |  | $ 2.4 |
Weighted average payback period for remaining deferred rent receivable |  |  |  | 10 months |

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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