Quarterly report pursuant to Section 13 or 15(d)

Properties, Net (Details 3)

v3.7.0.1
Properties, Net (Details 3)
$ in Thousands
Jun. 30, 2017
USD ($)
Property
Dec. 31, 2016
USD ($)
Property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Assets held for sale, net $ 51,291 $ 94,654
Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Properties, net 47,397 85,402
Deferred rent receivable 1,831 4,241
Intangible assets on real estate acquisitions, net 338 338
Deferred leasing costs, net 1,326 3,636
Lease incentives, net 399 1,037
Assets held for sale, net $ 51,291 $ 94,654
White Marsh, Maryland | Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of properties | Property 8  
Regional Office | White Marsh, Maryland | Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of properties | Property   8
Defense/Information Technology Locations | Northern Virginia Defense/IT | Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of properties | Property   1
Defense/Information Technology Locations | Fort Meade/BW Corridor | Assets held for sale, net    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of properties | Property 1