Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event (Details)

v3.5.0.2
Subsequent Event (Details)
$ in Thousands
6 Months Ended
Jul. 21, 2016
USD ($)
Property
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Subsequent Event [Line Items]      
Value of properties contributed   $ 22,600 $ 0
Subsequent Event | Single-tenant data centers | Operating office properties      
Subsequent Event [Line Items]      
Ownership percentage sold (percent) 50.00%    
Number of properties contributed | Property 6    
Value of properties contributed $ 147,600    
Debt instrument, face amount 60,000    
Transaction value of disposition of interest in properties 44,000    
Gain on sale of interest in properties $ 18,000