Quarterly report pursuant to Section 13 or 15(d)

Nature of Business - Disposal Group (Details)

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Nature of Business - Disposal Group (Details)
ft² in Thousands
Mar. 31, 2018
ft²
Braddock Metro Center [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Square footage of office property sold 356