Quarterly report pursuant to Section 13 or 15(d)

Properties, Net (Details 4)

v3.4.0.3
Properties, Net (Details 4)
ft² in Thousands, $ in Thousands
3 Months Ended
Aug. 07, 2015
USD ($)
ft²
Apr. 15, 2015
USD ($)
ft²
Mar. 19, 2015
USD ($)
ft²
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
2015 Acquisitions          
Business Acquisition [Line Items]          
Contributed revenues       $ 9,200 $ 332
Contributed net income from continuing operations       $ 942 $ 170
250 W Pratt St | Baltimore, Maryland          
Business Acquisition [Line Items]          
Square footage of real estate properties (in square feet) | ft²     367    
Acquired property percentage leased     96.20%    
Total acquisition cost     $ 61,800    
2600 Park Tower Drive | Northern Virginia          
Business Acquisition [Line Items]          
Square footage of real estate properties (in square feet) | ft²   237      
Acquired property percentage leased   100.00%      
Total acquisition cost   $ 80,500      
100 and 30 Light Street | Baltimore, Maryland          
Business Acquisition [Line Items]          
Square footage of real estate properties (in square feet) | ft² 558        
Acquired property percentage leased 93.50%        
Total acquisition cost $ 121,200        
Business combination, liabilities assumed 55,000        
Fair value assumption of debt $ 55,500