Annual report pursuant to Section 13 and 15(d)

Properties, net (Details 5)

v2.4.0.6
Properties, net (Details 5) (USD $)
12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2011
2011 Office Property Acquisition
Aug. 31, 2011
2011 Office Property Acquisition
310 The Bridge Street
Y
sqfeet
Aug. 09, 2011
2011 Office Property Acquisition
310 The Bridge Street
Aug. 31, 2011
2011 Office Property Acquisition
310 The Bridge Street
In-place lease value
Y
Aug. 09, 2011
2011 Office Property Acquisition
310 The Bridge Street
In-place lease value
Aug. 31, 2011
2011 Office Property Acquisition
310 The Bridge Street
Tenant relationship value
Y
Aug. 09, 2011
2011 Office Property Acquisition
310 The Bridge Street
Tenant relationship value
Aug. 31, 2011
2011 Office Property Acquisition
310 The Bridge Street
Above-market leases
Y
Aug. 09, 2011
2011 Office Property Acquisition
310 The Bridge Street
Above-market leases
Dec. 31, 2010
2010 Acquisitions
Y
Dec. 31, 2010
2010 Acquisitions
In-place lease value
Y
Dec. 31, 2010
2010 Acquisitions
Tenant relationship value
Y
Dec. 31, 2010
2010 Acquisitions
Above-market cost arrangements
Y
Dec. 31, 2010
2010 Acquisitions
Above-market leases
Y
Jun. 30, 2010
2010 Acquisitions
1550 Westbranch Drive
sqfeet
Jun. 28, 2010
2010 Acquisitions
1550 Westbranch Drive
Sep. 30, 2010
2010 Acquisitions
Power Loft @ Innovation
megawatt
sqfeet
tenant
Dec. 31, 2011
2010 Acquisitions
Power Loft @ Innovation
megawatt
Sep. 14, 2010
2010 Acquisitions
Power Loft @ Innovation
Sep. 30, 2010
2010 Acquisitions
Maritime Plaza I and II
sqfeet
property
Sep. 28, 2010
2010 Acquisitions
Maritime Plaza I and II
Dec. 31, 2011
2010 Acquisitions
Maritime Plaza I and II
Mortgage loan maturing in March 2014
Sep. 30, 2010
2010 Acquisitions
Maritime Plaza I and II
Mortgage loan maturing in March 2014
Sep. 28, 2010
2010 Acquisitions
Maritime Plaza I and II
Mortgage loan maturing in March 2014
Nov. 30, 2010
2010 Acquisitions
3120 Fairview Park Drive
sqfeet
Nov. 23, 2010
2010 Acquisitions
3120 Fairview Park Drive
Acquisitions                                                    
Square footage of real estate properties (in square feet)   138,000                         152,000   233,000     362,000         183,000  
Acquired property, percentage leased (as a percent)     100.00%                         100.00%     17.00%   100.00%          
Land, operating properties     $ 261,000             $ 13,265,000                                
Land, development                   5,545,000                                
Building and improvements     26,577,000             173,589,000                                
Construction in progress                   85,525,000                                
Intangible assets on real estate acquistions     6,575,000             42,896,000                                
Total assets                   320,820,000                                
Below-market leases                   (231,000)                                
Total acquisition cost     33,413,000             320,589,000           40,000,000     115,500,000   122,100,000         43,000,000
Number of tenants under lease at acquisition date                                 2                  
Combined initial critical load of tenants under lease at acquisition date (in megawatts)                                 3                  
Combined critical load expansion rights of tenants under lease at acquisition date (in megawatts)                                 5                  
The expected stabilization critical load after completion of development (in megawatts)                                   18                
Expected additional development costs subsequent to acquisition                                   160,000,000                
Additional development costs incurred                                   82,300,000                
Number of office properties acquired                                       2            
Stated amount of debt assumed in connection with acquisition                                             70,100,000      
Fair value of debt assumed in connection with acquisition                                             73,300,000      
Stated fixed interest rate (as a percent)                                           5.35%   5.35%    
Effective interest rate (as a percent)                                           3.95%   3.95%    
Cost expensed in connection with acquisition of operating properties 156,000                 3,400,000                                
Intangible assets on real estate acquisitions                                                    
Gross Carrying Amount         $ 2,904,000   $ 3,187,000   $ 484,000   $ 21,616,000 $ 14,450,000 $ 6,193,000 $ 637,000                        
Weighted average amortization period of intangible assets (in years)   6   3   8   3   11 4 10 40 2