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v3.3.1.900

Nature Of Business (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2011
Nature of Business [Line Items] |  |  |  |  |  |  |
Percentage of Distribution of Ordinary Taxable Income |  |  |  | 90.00% |  |  |
Gain on sale of real estate |  |  |  | $ 0 | $ 105,985 | $ 22,144 |
Gain on sale of real estate | $ 59,400 | $ 1,500 | $ 30,300 | 91,107 | 570 | 0 |
Disposal Group, Including Discontinued Operation, Gain (Loss) on Disposal |  |  | $ 106,000 | 89,653 | 106,555 | 22,144 |
Real estate impairment |  | $ 5,900 |  | $ 5,909 | $ 0 | $ 0 |
Ordinary income |  |  |  | 78.00% | 40.00% | 62.00% |
Return of capital |  |  |  | 22.00% | 52.00% | 38.00% |
Qualified dividends |  |  |  | 0.00% | 0.00% | 0.00% |
Unrecaptured Section 1250 gain |  |  |  | 0.00% | 8.00% | 0.00% |
Capital gain |  |  |  | 0.00% | 0.00% | 0.00% |
Dulles Station II [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Real estate impairment |  |  |  |  |  |  | $ 14,500
Taxable Reit Subsidiary [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Deferred Tax Assets, Net | 0 |  |  | $ 0 | $ 0 |  |
Deferred Tax Liabilities | $ 700 |  |  | 700 | 600 |  |
Taxable Reit Subsidiary [Member] | Dulles Station II [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Deferred Tax Liabilities, Other |  |  |  |  |  |  | $ 5,700
Multifamily [Member] | Country Club Towers [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  | 30,277 |  |  |
Multifamily [Member] | 1225 First Street [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  | 0 |  |  |
Multifamily [Member] | Munson Hill Towers [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  | $ 51,395 |  |  |
Retail [Member] | 5740 Columbia Road [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  |  | 570 |  |
Medical Office And Office Building [Member] | Medical Office Portfolio Transactions III & IV [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  |  | $ 105,985 |  |
Medical Office And Office Building [Member] | Medical Office Portfolio Transactions I & II [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  |  |  | $ 18,949 |
Office [Member] | Atrium Building [Member] |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |
Gain on sale of real estate |  |  |  |  |  | $ 3,195 |

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