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Related Party Transactions - Additional Information (Details)
ft² in Millions
Apr. 01, 2015
USD ($)
ft²
project
property
director
director_nominee
shares
Mar. 31, 2015
director
Related Party Transaction [Line Items]    
Directors on the board | director 11 8
Director nominees on the board | director_nominee 3  
Equity consideration, lower threshold for three nominee designations 50.00%  
Number of director nominees designated, sponsor stockholders, equity consideration, 30% to 50% | director_nominee 2  
Number of director nominees designated, sponsor stockholders, equity consideration, 15% to 30% | director_nominee 1  
Equity consideration, lower threshold for nominee designations 15.00%  
Maximum directors on the board | director 12  
Number of nominees permitted to be appointed to committees, given sponsor stockholders' right to designate two director nominees | director_nominee 1  
Upper threshold of equity interests for sponsor stockholders' restrictions 10.00%  
Percent of covered securities released from restrictions, tranche one 50.00%  
Percent of covered securities released from restrictions, tranche two 50.00%  
Period following written consent of termination of board nomination rights for release of restrictions on covered securities 30 days  
Aggregate maximum common stock issuable without written consent | shares 16,843,028  
Upper threshold of sponsor stockholders' equity consideration to maintain proxy voting 15.00%  
Holding period for redemption of units and grants 14 months  
Number of shares used in exchange valuation | shares 1  
Stockholders' Agreement, Holding Period Prior To Transfers Of Common Units 14 months  
Adjusted maximum aggregate common interests for sponsor stockholders | shares 17,707,056  
Maximum tenant ownership allowable for sponsor stockholders to reach excepted holder limit, overall company excluding Market street 9.90%  
Maximum tenant ownership allowable for sponsor stockholders to reach excepted holder limit, Market street 5.45%  
Maximum tenant ownership allowable for sponsor stockholders to reach excepted holder limit, minimum ownership percentage after exclusions 2.00%  
Maximum rental income expected to be produced by tenants allowable for sponsor stockholders to reach excepted holder limit, overall company excluding Market street 0.50%  
Maximum rental income expected to be produced by tenants allowable for sponsor stockholders to reach excepted holder limit, Market street 0.50%  
Minimum period between qualified offerings 120 days  
Qualified offerings, minimum amount | $ $ 50,000,000.0  
Upper threshold for sponsor stockholders' equity consideration at which company cannot consummate significant transactions 9.80%  
Maximum aggregate value of units for redemption | $ $ 50,000,000.0  
EOP Northern California Portfolio    
Related Party Transaction [Line Items]    
Area of real estate property | ft² 8.2  
Payments to acquire businesses | $ $ 1,750,000,000  
Shares issued as consideration for business combination | shares 63,474,791  
EOP Northern California Portfolio | Office Building    
Related Party Transaction [Line Items]    
Number of real estate properties acquired | property 26  
EOP Northern California Portfolio | Development Parcel    
Related Party Transaction [Line Items]    
Development projects acquired | project 2