|
Information by Business Segment (Details) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2012
segments
|
Dec. 31, 2011
|
Dec. 31, 2010
|
| Segment financial information for real estate operations |
|
|
|
| Number of primary office property segments (in number of segments) |
10
|
|
|
| Revenues from real estate operations |
$ 493,100
|
$ 495,832
|
$ 461,728
|
| Property operating expenses |
180,735
|
187,820
|
172,769
|
| NOI from real estate operations |
312,365
|
308,012
|
288,959
|
| Segment assets |
3,653,759
|
3,863,555
|
|
|
Operating Segment Total
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
493,100
|
495,832
|
461,728
|
| Property operating expenses |
180,735
|
187,820
|
172,769
|
| NOI from real estate operations |
312,365
|
308,012
|
288,959
|
| Additions to long-lived assets |
106,801
|
105,109
|
220,968
|
| Transfers from non-operating properties |
220,997
|
144,388
|
185,288
|
| Segment assets |
2,945,930
|
3,039,440
|
3,042,647
|
|
Baltimore and Washington Corridor
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
224,959
|
218,051
|
207,456
|
| Property operating expenses |
77,295
|
78,631
|
74,365
|
| NOI from real estate operations |
147,664
|
139,420
|
133,091
|
| Additions to long-lived assets |
24,599
|
20,974
|
21,629
|
| Transfers from non-operating properties |
64,318
|
67,357
|
48,549
|
| Segment assets |
1,214,105
|
1,216,770
|
1,182,659
|
|
Northern Virginia
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
79,574
|
74,214
|
75,063
|
| Property operating expenses |
29,103
|
28,518
|
26,688
|
| NOI from real estate operations |
50,471
|
45,696
|
48,375
|
| Additions to long-lived assets |
65,157
|
14,770
|
91,919
|
| Transfers from non-operating properties |
44,250
|
4
|
(42)
|
| Segment assets |
569,860
|
484,392
|
492,005
|
|
San Antonio
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
32,018
|
30,066
|
21,673
|
| Property operating expenses |
16,499
|
14,371
|
10,260
|
| NOI from real estate operations |
15,519
|
15,695
|
11,413
|
| Additions to long-lived assets |
280
|
0
|
17
|
| Transfers from non-operating properties |
468
|
17,638
|
40,500
|
| Segment assets |
119,369
|
131,412
|
114,850
|
|
Washington, DC - Capitol Riverfront
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
16,697
|
17,878
|
4,678
|
| Property operating expenses |
7,555
|
6,762
|
1,736
|
| NOI from real estate operations |
9,142
|
11,116
|
2,942
|
| Additions to long-lived assets |
317
|
2,794
|
92,827
|
| Transfers from non-operating properties |
0
|
0
|
0
|
| Segment assets |
104,544
|
111,318
|
119,927
|
|
St. Mary's and King George Counties
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
16,392
|
14,366
|
13,967
|
| Property operating expenses |
4,745
|
4,142
|
4,176
|
| NOI from real estate operations |
11,647
|
10,224
|
9,791
|
| Additions to long-lived assets |
1,844
|
1,638
|
1,103
|
| Transfers from non-operating properties |
289
|
16,858
|
0
|
| Segment assets |
98,027
|
100,818
|
88,221
|
|
Greater Baltimore
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
52,616
|
70,668
|
71,850
|
| Property operating expenses |
19,917
|
29,543
|
30,406
|
| NOI from real estate operations |
32,699
|
41,125
|
41,444
|
| Additions to long-lived assets |
9,690
|
21,086
|
11,501
|
| Transfers from non-operating properties |
37,558
|
16,307
|
15,289
|
| Segment assets |
320,548
|
402,067
|
473,977
|
|
Suburban Maryland
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
15,016
|
21,982
|
21,759
|
| Property operating expenses |
6,295
|
9,174
|
9,455
|
| NOI from real estate operations |
8,721
|
12,808
|
12,304
|
| Additions to long-lived assets |
1,319
|
12,267
|
1,959
|
| Transfers from non-operating properties |
790
|
395
|
5,623
|
| Segment assets |
53,252
|
148,635
|
145,646
|
|
Colorado Springs
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
25,189
|
23,860
|
24,897
|
| Property operating expenses |
9,283
|
8,800
|
8,231
|
| NOI from real estate operations |
15,906
|
15,060
|
16,666
|
| Additions to long-lived assets |
2,977
|
4,116
|
1,626
|
| Transfers from non-operating properties |
4,295
|
214
|
32,438
|
| Segment assets |
176,726
|
182,758
|
215,801
|
|
Greater Philadelphia
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
9,698
|
7,458
|
6,299
|
| Property operating expenses |
2,562
|
1,402
|
2,131
|
| NOI from real estate operations |
7,136
|
6,056
|
4,168
|
| Additions to long-lived assets |
286
|
516
|
30
|
| Transfers from non-operating properties |
10,626
|
5,446
|
23,119
|
| Segment assets |
78,798
|
102,572
|
99,701
|
|
Other
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
14,294
|
12,235
|
13,024
|
| Property operating expenses |
2,666
|
3,048
|
4,105
|
| NOI from real estate operations |
11,628
|
9,187
|
8,919
|
| Additions to long-lived assets |
133
|
26,889
|
(2,012)
|
| Transfers from non-operating properties |
394
|
0
|
14
|
| Segment assets |
109,924
|
115,048
|
85,633
|
|
Operating Wholesale Data Center
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
| Revenues from real estate operations |
6,647
|
5,054
|
1,062
|
| Property operating expenses |
4,815
|
3,429
|
1,216
|
| NOI from real estate operations |
1,832
|
1,625
|
(154)
|
| Additions to long-lived assets |
199
|
59
|
369
|
| Transfers from non-operating properties |
58,009
|
20,169
|
19,798
|
| Segment assets |
$ 100,777
|
$ 43,650
|
$ 24,227
|