Quarterly report pursuant to Section 13 or 15(d)

Information by Business Segment (Details)

v2.4.0.6
Information by Business Segment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
segment
Mar. 31, 2011
Dec. 31, 2011
Information by Business Segment      
Number of primary office property segments 10    
Segment financial information for real estate operations      
Revenues from real estate operations $ 125,304 $ 122,441  
Property operating expenses 48,387 50,152  
NOI from real estate operations 76,917 72,289  
Additions to long-lived assets 3,797,368 3,865,809  
Transfers from non-operating properties 34,831    
Segment assets 3,797,368 3,865,809 3,867,524
Operating Segment Total
     
Segment financial information for real estate operations      
Revenues from real estate operations 125,304 122,441  
Property operating expenses 48,387 50,152  
NOI from real estate operations 76,917 72,289  
Additions to long-lived assets 4,578 18,200  
Transfers from non-operating properties 34,831 29,257  
Segment assets 3,007,147 3,058,343  
Baltimore/Washington Corridor
     
Segment financial information for real estate operations      
Revenues from real estate operations 56,250 53,252  
Property operating expenses 20,151 21,058  
NOI from real estate operations 36,099 32,194  
Additions to long-lived assets 1,864 6,405  
Transfers from non-operating properties 25,594 19,883  
Segment assets 1,231,949 1,199,244  
Northern Virginia
     
Segment financial information for real estate operations      
Revenues from real estate operations 18,560 18,274  
Property operating expenses 7,400 7,590  
NOI from real estate operations 11,160 10,684  
Additions to long-lived assets 1,661 2,033  
Transfers from non-operating properties   (7)  
Segment assets 480,457 488,599  
San Antonio
     
Segment financial information for real estate operations      
Revenues from real estate operations 7,608 7,663  
Property operating expenses 3,817 3,813  
NOI from real estate operations 3,791 3,850  
Transfers from non-operating properties 362 600  
Segment assets 120,024 115,221  
Washington, DC - Capitol Riverfront
     
Segment financial information for real estate operations      
Revenues from real estate operations 3,894 4,590  
Property operating expenses 1,910 1,627  
NOI from real estate operations 1,984 2,963  
Additions to long-lived assets (729) 156  
Segment assets 108,649 117,758  
St. Mary's and King George Counties
     
Segment financial information for real estate operations      
Revenues from real estate operations 4,212 3,534  
Property operating expenses 1,258 1,014  
NOI from real estate operations 2,954 2,520  
Additions to long-lived assets 167 380  
Transfers from non-operating properties 556    
Segment assets 99,946 87,690  
Greater Baltimore
     
Segment financial information for real estate operations      
Revenues from real estate operations 15,372 17,612  
Property operating expenses 5,890 8,452  
NOI from real estate operations 9,482 9,160  
Additions to long-lived assets 719 8,088  
Transfers from non-operating properties 365 4,247  
Segment assets 370,754 479,474  
Suburban Maryland
     
Segment financial information for real estate operations      
Revenues from real estate operations 5,749 5,609  
Property operating expenses 2,521 2,661  
NOI from real estate operations 3,228 2,948  
Additions to long-lived assets 771 1,052  
Transfers from non-operating properties 335 354  
Segment assets 147,197 145,913  
Colorado Springs
     
Segment financial information for real estate operations      
Revenues from real estate operations 6,453 5,920  
Property operating expenses 2,385 2,343  
NOI from real estate operations 4,068 3,577  
Additions to long-lived assets 99 736  
Transfers from non-operating properties 316    
Segment assets 181,241 214,111  
Greater Philadelphia
     
Segment financial information for real estate operations      
Revenues from real estate operations 2,172 1,939  
Property operating expenses 615 418  
NOI from real estate operations 1,557 1,521  
Additions to long-lived assets   (4)  
Transfers from non-operating properties 7,303 (2,474)  
Segment assets 109,432 96,372  
Other
     
Segment financial information for real estate operations      
Revenues from real estate operations 3,618 2,838  
Property operating expenses 1,233 467  
NOI from real estate operations 2,385 2,371  
Additions to long-lived assets 26 (646)  
Segment assets 114,108 83,247  
Wholesale Data Center
     
Segment financial information for real estate operations      
Revenues from real estate operations 1,416 1,210  
Property operating expenses 1,207 709  
NOI from real estate operations 209 501  
Transfers from non-operating properties   6,654  
Segment assets $ 43,390 $ 30,714