Quarterly report pursuant to Section 13 or 15(d)

Information by Business Segment (Details)

v2.4.0.8
Information by Business Segment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
segment
Jun. 30, 2013
Jun. 30, 2014
segment
Jun. 30, 2013
Dec. 31, 2013
Segment Reporting [Abstract]          
Number of primary office property segments 10   10    
Segment financial information for real estate operations          
Revenues from real estate operations $ 115,964 $ 125,275 $ 240,860 $ 247,352  
Property operating expenses 43,856 44,654 93,608 88,720  
NOI from real estate operations 72,108 80,621 147,252 158,632  
Additions to long-lived assets 14,096 11,782      
Transfers from non-operating properties 35,385 23,162      
Segment assets 3,709,500 3,699,635 3,709,500 3,699,635 3,629,952
Operating Segment Total
          
Segment financial information for real estate operations          
Revenues from real estate operations     240,860 247,352  
Property operating expenses     93,608 88,720  
NOI from real estate operations     147,252 158,632  
Additions to long-lived assets     27,825 17,636  
Transfers from non-operating properties     92,325 154,758  
Segment assets 2,951,299 3,048,562 2,951,299 3,048,562  
Baltimore and Washington Corridor
          
Segment financial information for real estate operations          
Revenues from real estate operations 57,456 59,640 118,569 118,300  
Property operating expenses 19,348 19,728 42,945 39,781  
NOI from real estate operations 38,108 39,912 75,624 78,519  
Additions to long-lived assets 6,289 4,120 12,030 6,880  
Transfers from non-operating properties 20,712 6,087 27,623 29,084  
Segment assets 1,259,974 1,271,384 1,259,974 1,271,384  
Northern Virginia
          
Segment financial information for real estate operations          
Revenues from real estate operations 20,898 22,988 45,866 45,930  
Property operating expenses 7,651 8,204 16,624 16,021  
NOI from real estate operations 13,247 14,784 29,242 29,909  
Additions to long-lived assets 4,805 2,696 8,300 4,240  
Transfers from non-operating properties 683 1,015 27,271 10,854  
Segment assets 634,834 571,851 634,834 571,851  
San Antonio
          
Segment financial information for real estate operations          
Revenues from real estate operations 8,758 8,364 17,237 16,121  
Property operating expenses 4,817 4,478 9,291 8,366  
NOI from real estate operations 3,941 3,886 7,946 7,755  
Additions to long-lived assets 0 7 (6) 17  
Transfers from non-operating properties 0 0 0 0  
Segment assets 117,328 118,827 117,328 118,827  
Huntsville
          
Segment financial information for real estate operations          
Revenues from real estate operations 2,404 1,359 4,959 2,099  
Property operating expenses 859 310 1,512 492  
NOI from real estate operations 1,545 1,049 3,447 1,607  
Additions to long-lived assets 334 3,497 2,841 3,497  
Transfers from non-operating properties 223 (3,283) 20,325 20,957  
Segment assets 97,838 51,663 97,838 51,663  
Washington, DC - Capitol Riverfront
          
Segment financial information for real estate operations          
Revenues from real estate operations 3,831 4,177 7,465 8,421  
Property operating expenses 1,754 1,874 3,519 3,823  
NOI from real estate operations 2,077 2,303 3,946 4,598  
Additions to long-lived assets 478 241 541 398  
Transfers from non-operating properties 0 0 0 0  
Segment assets 97,136 101,476 97,136 101,476  
St. Mary's and King George Counties
          
Segment financial information for real estate operations          
Revenues from real estate operations 4,202 4,093 8,518 8,085  
Property operating expenses 1,289 1,223 2,793 2,416  
NOI from real estate operations 2,913 2,870 5,725 5,669  
Additions to long-lived assets 943 729 1,782 1,004  
Transfers from non-operating properties 0 6 0 12  
Segment assets 95,553 97,084 95,553 97,084  
Greater Baltimore
          
Segment financial information for real estate operations          
Revenues from real estate operations 11,024 10,824 22,520 21,543  
Property operating expenses 4,500 4,097 9,976 8,265  
NOI from real estate operations 6,524 6,727 12,544 13,278  
Additions to long-lived assets 1,242 (648) 2,254 54  
Transfers from non-operating properties 2,953 (9) 3,027 104  
Segment assets 300,139 313,788 300,139 313,788  
Greater Philadelphia
          
Segment financial information for real estate operations          
Revenues from real estate operations 2,366 2,784 5,706 5,271  
Property operating expenses 1,144 720 2,444 1,558  
NOI from real estate operations 1,222 2,064 3,262 3,713  
Additions to long-lived assets 88 285 99 285  
Transfers from non-operating properties 10,198 17,567 13,374 24,617  
Segment assets 104,436 102,098 104,436 102,098  
Colorado Springs
          
Segment financial information for real estate operations          
Revenues from real estate operations (12) 6,469 6 13,151  
Property operating expenses 11 2,185 2 4,622  
NOI from real estate operations (23) 4,284 4 8,529  
Additions to long-lived assets 0 595 0 910  
Transfers from non-operating properties 19 896 30 2,679  
Segment assets 0 171,745 0 171,745  
Other
          
Segment financial information for real estate operations          
Revenues from real estate operations 2,545 2,560 5,121 5,061  
Property operating expenses 602 317 933 542  
NOI from real estate operations 1,943 2,243 4,188 4,519  
Additions to long-lived assets (93) 84 (38) 175  
Transfers from non-operating properties 0 2 0 2  
Segment assets 78,918 81,334 78,918 81,334  
Wholesale Data Center
          
Segment financial information for real estate operations          
Revenues from real estate operations 2,492 2,017 4,893 3,370  
Property operating expenses 1,881 1,518 3,569 2,834  
NOI from real estate operations 611 499 1,324 536  
Additions to long-lived assets 10 176 22 176  
Transfers from non-operating properties 597 881 675 66,449  
Segment assets $ 165,143 $ 167,312 $ 165,143 $ 167,312