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Discontinued Operations - Schedule of Cash Flows from Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
1899 Pennsylvania Avenue [Member] |  |  |
Statements of Cash Flows: |  |  |
Cash provided by operating activities |  | $ 3,262 |
Additional Cash Flow information: |  |  |
Depreciation and amortization |  | $ 690 |
1899 Pennsylvania Avenue and Liberty Place [Member] |  |  |
Statements of Cash Flows: |  |  |
Cash provided by operating activities |  |  | $ 9,732
Cash provided by investing activities |  |  | 148,814
Additional Cash Flow information: |  |  |
Depreciation and amortization | $ 2,362 |  | 7,087
Additions to real estate |  |  | $ (1,493)

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- Definition Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 + Details
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