|
Information by Business Segment (Details) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
9 Months Ended |
|
|
Sep. 30, 2014
segment
|
Sep. 30, 2013
|
Sep. 30, 2014
segment
|
Sep. 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 |
$ 118,240
|
$ 124,561
|
$ 359,100
|
$ 371,913
|
|
| Property operating expenses |
42,881
|
44,885
|
136,489
|
133,605
|
|
| NOI from real estate operations |
75,359
|
79,676
|
222,611
|
238,308
|
|
| Additions to long-lived assets |
22,793
|
13,942
|
|
|
|
| Transfers from non-operating properties |
42,802
|
42,842
|
|
|
|
| Segment assets |
3,680,188
|
3,755,588
|
3,680,188
|
3,755,588
|
3,629,952
|
|
Operating Segment Total
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
|
|
359,100
|
371,913
|
|
| Property operating expenses |
|
|
136,489
|
133,605
|
|
| NOI from real estate operations |
|
|
222,611
|
238,308
|
|
| Additions to long-lived assets |
|
|
50,618
|
31,578
|
|
| Transfers from non-operating properties |
|
|
135,127
|
197,600
|
|
| Segment assets |
2,962,686
|
3,053,813
|
2,962,686
|
3,053,813
|
|
|
Baltimore and Washington Corridor
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
58,883
|
59,558
|
177,452
|
177,858
|
|
| Property operating expenses |
19,457
|
19,642
|
62,402
|
59,423
|
|
| NOI from real estate operations |
39,426
|
39,916
|
115,050
|
118,435
|
|
| Additions to long-lived assets |
7,248
|
7,292
|
19,278
|
14,172
|
|
| Transfers from non-operating properties |
22,680
|
8,523
|
50,303
|
37,607
|
|
| Segment assets |
1,278,713
|
1,275,972
|
1,278,713
|
1,275,972
|
|
|
Northern Virginia
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
21,369
|
23,062
|
67,235
|
68,992
|
|
| Property operating expenses |
7,500
|
7,999
|
24,124
|
24,020
|
|
| NOI from real estate operations |
13,869
|
15,063
|
43,111
|
44,972
|
|
| Additions to long-lived assets |
5,898
|
2,459
|
14,198
|
6,699
|
|
| Transfers from non-operating properties |
15,403
|
26,355
|
42,674
|
37,209
|
|
| Segment assets |
648,248
|
593,335
|
648,248
|
593,335
|
|
|
San Antonio
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
9,031
|
7,898
|
26,268
|
24,019
|
|
| Property operating expenses |
5,100
|
4,061
|
14,391
|
12,427
|
|
| NOI from real estate operations |
3,931
|
3,837
|
11,877
|
11,592
|
|
| Additions to long-lived assets |
0
|
251
|
(6)
|
268
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Segment assets |
116,837
|
118,701
|
116,837
|
118,701
|
|
|
Huntsville
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
2,471
|
1,360
|
7,430
|
3,459
|
|
| Property operating expenses |
763
|
382
|
2,275
|
874
|
|
| NOI from real estate operations |
1,708
|
978
|
5,155
|
2,585
|
|
| Additions to long-lived assets |
455
|
4
|
3,296
|
3,501
|
|
| Transfers from non-operating properties |
1,496
|
(33)
|
21,821
|
20,924
|
|
| Segment assets |
98,334
|
50,737
|
98,334
|
50,737
|
|
|
Washington, DC - Capitol Riverfront
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
3,524
|
4,295
|
10,989
|
12,716
|
|
| Property operating expenses |
1,824
|
1,946
|
5,343
|
5,769
|
|
| NOI from real estate operations |
1,700
|
2,349
|
5,646
|
6,947
|
|
| Additions to long-lived assets |
458
|
86
|
999
|
484
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Segment assets |
96,131
|
99,852
|
96,131
|
99,852
|
|
|
St. Mary's and King George Counties
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
4,158
|
4,270
|
12,676
|
12,355
|
|
| Property operating expenses |
1,277
|
1,299
|
4,070
|
3,715
|
|
| NOI from real estate operations |
2,881
|
2,971
|
8,606
|
8,640
|
|
| Additions to long-lived assets |
5,189
|
630
|
6,971
|
1,634
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
12
|
|
| Segment assets |
100,009
|
96,679
|
100,009
|
96,679
|
|
|
Greater Baltimore
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
10,436
|
10,703
|
32,956
|
32,246
|
|
| Property operating expenses |
3,810
|
4,143
|
13,786
|
12,408
|
|
| NOI from real estate operations |
6,626
|
6,560
|
19,170
|
19,838
|
|
| Additions to long-lived assets |
3,021
|
1,707
|
5,275
|
1,761
|
|
| Transfers from non-operating properties |
495
|
9
|
3,522
|
113
|
|
| Segment assets |
274,931
|
305,947
|
274,931
|
305,947
|
|
|
Greater Philadelphia
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
2,951
|
3,258
|
8,657
|
8,529
|
|
| Property operating expenses |
837
|
924
|
3,281
|
2,482
|
|
| NOI from real estate operations |
2,114
|
2,334
|
5,376
|
6,047
|
|
| Additions to long-lived assets |
625
|
102
|
724
|
387
|
|
| Transfers from non-operating properties |
2,506
|
3,414
|
15,880
|
28,031
|
|
| Segment assets |
107,051
|
105,112
|
107,051
|
105,112
|
|
|
Colorado Springs
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
0
|
6,571
|
6
|
19,722
|
|
| Property operating expenses |
3
|
2,361
|
5
|
6,983
|
|
| NOI from real estate operations |
(3)
|
4,210
|
1
|
12,739
|
|
| Additions to long-lived assets |
0
|
1,413
|
0
|
2,323
|
|
| Transfers from non-operating properties |
0
|
1,860
|
30
|
4,539
|
|
| Segment assets |
0
|
158,690
|
0
|
158,690
|
|
|
Other
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
2,541
|
2,510
|
7,662
|
7,571
|
|
| Property operating expenses |
257
|
282
|
1,190
|
824
|
|
| NOI from real estate operations |
2,284
|
2,228
|
6,472
|
6,747
|
|
| Additions to long-lived assets |
(125)
|
(88)
|
(163)
|
87
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
2
|
|
| Segment assets |
78,240
|
80,749
|
78,240
|
80,749
|
|
|
Wholesale Data Center
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
2,876
|
1,076
|
7,769
|
4,446
|
|
| Property operating expenses |
2,053
|
1,846
|
5,622
|
4,680
|
|
| NOI from real estate operations |
823
|
(770)
|
2,147
|
(234)
|
|
| Additions to long-lived assets |
24
|
86
|
46
|
262
|
|
| Transfers from non-operating properties |
222
|
2,714
|
897
|
69,163
|
|
| Segment assets |
$ 164,192
|
$ 168,039
|
$ 164,192
|
$ 168,039
|
|