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Commitments and Contingencies - Narrative (Details)
$ in Millions
9 Months Ended
Sep. 30, 2016
USD ($)
tenant
Unsecured Debt | Revolving Credit Facility  
Loss Contingencies  
Letters of credit, amount outstanding | $ $ 2.6
Rentable Square Feet | Customer Concentration Risk  
Loss Contingencies  
Concentration risk, percent 22.40%
Number of tenants | tenant 15
Rentable Square Feet | Customer Concentration Risk | Media And Entertainment Sector  
Loss Contingencies  
Concentration risk, percent 13.40%
Rentable Square Feet | Customer Concentration Risk | Technology Sector  
Loss Contingencies  
Concentration risk, percent 28.10%