Quarterly report pursuant to Section 13 or 15(d)

Nature of Business - Narrative (Details)

v3.7.0.1
Nature of Business - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Percentage of distribution of ordinary taxable income 90.00%  
Watergate 600 [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Deferred tax liability recognized in connection with acquisition $ 560  
Taxable Reit Subsidiary [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Deferred tax assets net of valuation allowance 600 $ 500
Deferred tax assets, valuation allowance 2,700 2,900
Deferred tax liabilities, net $ 1,000 $ 400