Quarterly report pursuant to Section 13 or 15(d)

Properties, Net (Details 3)

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Properties, Net (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Assets held for sale, net $ 42,226 $ 42,226
Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Properties, net 38,670 38,670
Deferred rent receivable 3,237 3,237
Deferred leasing costs, net 319 319
Assets held for sale, net 42,226 $ 42,226
11751 Meadowville Lane | Operating Properties | Defense/Information Technology Locations | Data Center Shells | Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Indemnification amount $ 20,000