v3.3.1.900
Discontinued Operations Discontinued Operations (Details)
$ in Millions
 12 Months Ended
Jan. 21, 2016
USD ($)
Jan. 13, 2016
USD ($)
Dec. 31, 2015
USD ($)
ft²
building
Dec. 31, 2014
USD ($)
ft²
property
Dec. 31, 2013
USD ($)
ft²
Jan. 31, 2014
ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of real estate properties     2 5    
Net Rentable Area | ft²     1,046,394 1,471,319 200,306 79,000
Dispositions Sales Price [1]     $ 309.2 $ 399.5 $ 56.9  
Von Karman, Irvine, California [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Dispositions Sales Price [2],[3]     $ 26.0 $ 26.0    
San Diego Properties, San Diego, CA [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft² [4]       1,049,035    
Dispositions Sales Price [1]       $ 294.7    
9785&9791 Towne Centre Drive, San Diego CA [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²       126,000    
Dispositions Sales Price [1]       $ 29.5    
111 Pacifica [Member] [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²       67,496    
Dispositions Sales Price [1]       $ 15.1    
4040 Civic [Member] [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²       130,237    
Dispositions Sales Price [1]       $ 34.9    
999 Town &Country[Member] [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²       98,551    
Dispositions Sales Price [1]       $ 25.3    
Kaiser Boulevard, Anaheim, California [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²         59,790  
Dispositions Sales Price [1]         $ 9.6  
Directors Place, Sorrento Mesa, California One [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Rentable Area | ft²         50,360  
Dispositions Sales Price [1]         $ 32.6  
Subsequent Event [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Dispositions Sales Price $ 262.3 $ 4.5        
[1] Represents gross sales price before the impact of broker commissions and closing costs.
[2] Represents gross sales price before the impact of commissions and closing costs.
[3] This transaction resulted in a gain on sale of $17.3 million.
[4] The San Diego Properties included the following: 10020 Pacific Mesa Boulevard, 6055 Lusk Avenue, 5010 and 5005 Wateridge Vista Drive, 15435 and 15445 Innovation Drive, and 15051, 15073, 15231, 15253, 15333 and 15378 Avenue of Science. These properties were held for sale as of December 31, 2013.