|
Information by Business Segment (Details) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
6 Months Ended |
|
|
Jun. 30, 2012
segments
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Jun. 30, 2011
|
Jun. 30, 2012
segments
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Jun. 30, 2011
|
Dec. 31, 2011
|
| Segment Reporting [Abstract] |
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|
|
|
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| Number of primary office property segments |
10
|
|
10
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 123,968
|
$ 120,806
|
$ 249,272
|
$ 243,247
|
|
| Property operating expenses |
45,159
|
44,673
|
93,546
|
94,825
|
|
| NOI from real estate operations |
78,809
|
76,133
|
155,726
|
148,422
|
|
| Additions to long-lived assets |
9,726
|
17,017
|
14,304
|
35,217
|
|
| Transfers from non-operating properties |
66,371
|
15,954
|
101,202
|
45,211
|
|
| Segment assets |
3,715,075
|
3,868,230
|
3,715,075
|
3,868,230
|
3,867,524
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|
Operating Segment Total
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|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Segment assets |
2,982,956
|
3,026,262
|
2,982,956
|
3,026,262
|
|
|
Baltimore and Washington Corridor
|
|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
55,677
|
52,860
|
111,927
|
106,112
|
|
| Property operating expenses |
19,065
|
17,983
|
39,216
|
39,041
|
|
| NOI from real estate operations |
36,612
|
34,877
|
72,711
|
67,071
|
|
| Additions to long-lived assets |
3,075
|
4,816
|
4,939
|
11,221
|
|
| Transfers from non-operating properties |
4,463
|
6,140
|
30,057
|
26,023
|
|
| Segment assets |
1,227,287
|
1,193,626
|
1,227,287
|
1,193,626
|
|
|
Northern Virginia
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|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
19,051
|
18,445
|
37,611
|
36,719
|
|
| Property operating expenses |
7,176
|
7,276
|
14,576
|
14,866
|
|
| NOI from real estate operations |
11,875
|
11,169
|
23,035
|
21,853
|
|
| Additions to long-lived assets |
719
|
2,781
|
2,380
|
4,814
|
|
| Transfers from non-operating properties |
0
|
4
|
0
|
(3)
|
|
| Segment assets |
474,959
|
485,927
|
474,959
|
485,927
|
|
|
San Antonio
|
|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
7,830
|
7,089
|
15,438
|
14,752
|
|
| Property operating expenses |
4,023
|
3,138
|
7,840
|
6,951
|
|
| NOI from real estate operations |
3,807
|
3,951
|
7,598
|
7,801
|
|
| Additions to long-lived assets |
259
|
0
|
259
|
0
|
|
| Transfers from non-operating properties |
102
|
159
|
464
|
759
|
|
| Segment assets |
120,069
|
115,149
|
120,069
|
115,149
|
|
|
Washington, DC - Capitol Riverfront
|
|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
4,232
|
4,252
|
8,126
|
8,842
|
|
| Property operating expenses |
1,716
|
1,657
|
3,626
|
3,284
|
|
| NOI from real estate operations |
2,516
|
2,595
|
4,500
|
5,558
|
|
| Additions to long-lived assets |
431
|
656
|
(298)
|
812
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
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| Segment assets |
107,390
|
115,515
|
107,390
|
115,515
|
|
|
St. Mary's and King George Counties
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|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
4,139
|
3,564
|
8,351
|
7,098
|
|
| Property operating expenses |
1,139
|
961
|
2,397
|
1,975
|
|
| NOI from real estate operations |
3,000
|
2,603
|
5,954
|
5,123
|
|
| Additions to long-lived assets |
293
|
461
|
460
|
841
|
|
| Transfers from non-operating properties |
(362)
|
0
|
194
|
0
|
|
| Segment assets |
98,779
|
85,563
|
98,779
|
85,563
|
|
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Greater Baltimore
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|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
14,664
|
17,846
|
30,036
|
35,458
|
|
| Property operating expenses |
5,805
|
7,233
|
11,695
|
15,685
|
|
| NOI from real estate operations |
8,859
|
10,613
|
18,341
|
19,773
|
|
| Additions to long-lived assets |
3,616
|
4,115
|
4,335
|
12,203
|
|
| Transfers from non-operating properties |
29
|
3,594
|
394
|
7,841
|
|
| Segment assets |
369,497
|
459,601
|
369,497
|
459,601
|
|
|
Suburban Maryland
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|
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| Segment financial information for real estate operations |
|
|
|
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| Revenues from real estate operations |
4,560
|
5,325
|
10,309
|
10,934
|
|
| Property operating expenses |
1,882
|
2,178
|
4,403
|
4,839
|
|
| NOI from real estate operations |
2,678
|
3,147
|
5,906
|
6,095
|
|
| Additions to long-lived assets |
412
|
2,453
|
1,183
|
3,505
|
|
| Transfers from non-operating properties |
546
|
31
|
881
|
385
|
|
| Segment assets |
78,736
|
142,334
|
78,736
|
142,334
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|
|
Colorado Springs
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|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
6,149
|
5,912
|
12,602
|
11,832
|
|
| Property operating expenses |
2,194
|
1,980
|
4,579
|
4,323
|
|
| NOI from real estate operations |
3,955
|
3,932
|
8,023
|
7,509
|
|
| Additions to long-lived assets |
687
|
1,085
|
786
|
1,821
|
|
| Transfers from non-operating properties |
1,980
|
2
|
2,296
|
2
|
|
| Segment assets |
181,808
|
213,021
|
181,808
|
213,021
|
|
|
Greater Philadelphia
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|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
2,458
|
1,675
|
4,630
|
3,614
|
|
| Property operating expenses |
732
|
345
|
1,347
|
763
|
|
| NOI from real estate operations |
1,726
|
1,330
|
3,283
|
2,851
|
|
| Additions to long-lived assets |
90
|
0
|
90
|
(4)
|
|
| Transfers from non-operating properties |
2,087
|
6,024
|
9,390
|
3,550
|
|
| Segment assets |
111,145
|
101,542
|
111,145
|
101,542
|
|
|
Other
|
|
|
|
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| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
3,770
|
2,562
|
7,388
|
5,400
|
|
| Property operating expenses |
252
|
1,093
|
1,485
|
1,560
|
|
| NOI from real estate operations |
3,518
|
1,469
|
5,903
|
3,840
|
|
| Additions to long-lived assets |
133
|
650
|
159
|
4
|
|
| Transfers from non-operating properties |
(154)
|
0
|
(154)
|
0
|
|
| Segment assets |
112,578
|
83,437
|
112,578
|
83,437
|
|
|
Wholesale Data Center
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|
|
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| Segment financial information for real estate operations |
|
|
|
|
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| Revenues from real estate operations |
1,438
|
1,276
|
2,854
|
2,486
|
|
| Property operating expenses |
1,175
|
829
|
2,382
|
1,538
|
|
| NOI from real estate operations |
263
|
447
|
472
|
948
|
|
| Additions to long-lived assets |
11
|
0
|
11
|
0
|
|
| Transfers from non-operating properties |
57,680
|
0
|
57,680
|
6,654
|
|
| Segment assets |
$ 100,708
|
$ 30,547
|
$ 100,708
|
$ 30,547
|
|