Schedule III - Real Estate and Accumulated Depreciation (Details)

v3.10.0.1

Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Real Estate and Accumulated Depreciation
Encumbrances	$ 174,043	$ 174,043
Initial Cost
Land	711,034	711,034
Building and Land Improvements	3,002,155	3,002,155
Costs Capitalized Subsequent to Acquisition	435,340	435,340
Gross Amounts Carried At Close of Period
Land	711,034	711,034
Building and Land Improvements	3,437,495	3,437,495
Total	4,148,529	4,148,529	$ 3,980,813	$ 3,874,715	$ 4,158,616
Accumulated Depreciation	(897,903)	(897,903)	(801,038)	(715,951)	$ (718,680)
Additional information
Debt excluded from encumbrances	1,823,909	1,823,909	1,828,333
Net discounts and deferred financing costs	14,600	14,600
Aggregate cost of assets for federal income tax purposes	3,500,000	3,500,000
Impairment losses		$ 2,367	15,123	$ 101,391
Buildings improvements [Member] | Minimum [Member]
Additional information
Estimated lives over which depreciation is recognized		10 years
Buildings improvements [Member] | Maximum [Member]
Additional information
Estimated lives over which depreciation is recognized		40 years
Revolving Credit Facility [Member]
Additional information
Debt excluded from encumbrances	213,000	$ 213,000	126,000
Term Loan Facilities [Member]
Additional information
Debt excluded from encumbrances	248,273	248,273	$ 347,959
Unsecured Senior Notes [Member]
Additional information
Debt excluded from encumbrances	1,200,000	1,200,000
Unsecured notes payable [Member]
Additional information
Debt excluded from encumbrances	1,200	1,200
Fixed rate mortgage loans [Member]
Additional information
Net discounts and deferred financing costs	3,600	3,600
100 Light Street [Member]
Real Estate and Accumulated Depreciation
Encumbrances	48,473	48,473
Initial Cost
Land	26,715	26,715
Building and Land Improvements	58,343	58,343
Costs Capitalized Subsequent to Acquisition	8,065	8,065
Gross Amounts Carried At Close of Period
Land	26,715	26,715
Building and Land Improvements	66,408	66,408
Total	93,123	93,123
Accumulated Depreciation	(13,232)	(13,232)
1000 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	10,390	10,390
Initial Cost
Land	0	0
Building and Land Improvements	20,533	20,533
Costs Capitalized Subsequent to Acquisition	5	5
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	20,538	20,538
Total	20,538	20,538
Accumulated Depreciation	(2,978)	(2,978)
1100 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	10,917	10,917
Initial Cost
Land	0	0
Building and Land Improvements	19,593	19,593
Costs Capitalized Subsequent to Acquisition	6	6
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	19,599	19,599
Total	19,599	19,599
Accumulated Depreciation	(2,435)	(2,435)
114 National Business Parkway [Member]
Initial Cost
Land	364	364
Building and Land Improvements	3,109	3,109
Costs Capitalized Subsequent to Acquisition	118	118
Gross Amounts Carried At Close of Period
Land	364	364
Building and Land Improvements	3,227	3,227
Total	3,591	3,591
Accumulated Depreciation	(1,401)	(1,401)
1200 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	12,616	12,616
Initial Cost
Land	0	0
Building and Land Improvements	22,389	22,389
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	22,389	22,389
Total	22,389	22,389
Accumulated Depreciation	(2,824)	(2,824)
1201 M Street [Member]
Initial Cost
Land	0	0
Building and Land Improvements	49,785	49,785
Costs Capitalized Subsequent to Acquisition	8,619	8,619
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	58,404	58,404
Total	58,404	58,404
Accumulated Depreciation	(14,892)	(14,892)
1201 Winterson Road [Member]
Initial Cost
Land	2,130	2,130
Building and Land Improvements	16,601	16,601
Costs Capitalized Subsequent to Acquisition	488	488
Gross Amounts Carried At Close of Period
Land	2,130	2,130
Building and Land Improvements	17,089	17,089
Total	19,219	19,219
Accumulated Depreciation	(4,665)	(4,665)
1220 12th Street, SE [Member]
Initial Cost
Land	0	0
Building and Land Improvements	42,464	42,464
Costs Capitalized Subsequent to Acquisition	7,355	7,355
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	49,819	49,819
Total	49,819	49,819
Accumulated Depreciation	(13,674)	(13,674)
1243 Winterson Road [Member]
Initial Cost
Land	630	630
Building and Land Improvements	0	0
Gross Amounts Carried At Close of Period
Land	630	630
Building and Land Improvements	0	0
Total	630	630
131 National Business Parkway [Member]
Initial Cost
Land	1,906	1,906
Building and Land Improvements	7,623	7,623
Costs Capitalized Subsequent to Acquisition	3,962	3,962
Gross Amounts Carried At Close of Period
Land	1,906	1,906
Building and Land Improvements	11,585	11,585
Total	13,491	13,491
Accumulated Depreciation	(6,697)	(6,697)
132 National Business Parkway [Member]
Initial Cost
Land	2,917	2,917
Building and Land Improvements	12,259	12,259
Costs Capitalized Subsequent to Acquisition	4,666	4,666
Gross Amounts Carried At Close of Period
Land	2,917	2,917
Building and Land Improvements	16,925	16,925
Total	19,842	19,842
Accumulated Depreciation	(9,325)	(9,325)
133 National Business Parkway [Member]
Initial Cost
Land	2,517	2,517
Building and Land Improvements	10,068	10,068
Costs Capitalized Subsequent to Acquisition	5,584	5,584
Gross Amounts Carried At Close of Period
Land	2,517	2,517
Building and Land Improvements	15,652	15,652
Total	18,169	18,169
Accumulated Depreciation	(9,639)	(9,639)
134 National Business Parkway [Member]
Initial Cost
Land	3,684	3,684
Building and Land Improvements	7,517	7,517
Costs Capitalized Subsequent to Acquisition	4,108	4,108
Gross Amounts Carried At Close of Period
Land	3,684	3,684
Building and Land Improvements	11,625	11,625
Total	15,309	15,309
Accumulated Depreciation	(6,036)	(6,036)
1340 Ashton Road [Member]
Initial Cost
Land	905	905
Building and Land Improvements	3,620	3,620
Costs Capitalized Subsequent to Acquisition	1,516	1,516
Gross Amounts Carried At Close of Period
Land	905	905
Building and Land Improvements	5,136	5,136
Total	6,041	6,041
Accumulated Depreciation	(2,971)	(2,971)
13450 Sunrise Valley Road [Member]
Initial Cost
Land	1,386	1,386
Building and Land Improvements	5,576	5,576
Costs Capitalized Subsequent to Acquisition	4,592	4,592
Gross Amounts Carried At Close of Period
Land	1,386	1,386
Building and Land Improvements	10,168	10,168
Total	11,554	11,554
Accumulated Depreciation	(5,295)	(5,295)
13454 Sunrise Valley Road [Member]
Initial Cost
Land	2,899	2,899
Building and Land Improvements	11,986	11,986
Costs Capitalized Subsequent to Acquisition	8,191	8,191
Gross Amounts Carried At Close of Period
Land	2,899	2,899
Building and Land Improvements	20,177	20,177
Total	23,076	23,076
Accumulated Depreciation	(10,176)	(10,176)
135 National Business Parkway [Member]
Initial Cost
Land	2,484	2,484
Building and Land Improvements	9,750	9,750
Costs Capitalized Subsequent to Acquisition	6,075	6,075
Gross Amounts Carried At Close of Period
Land	2,484	2,484
Building and Land Improvements	15,825	15,825
Total	18,309	18,309
Accumulated Depreciation	(8,783)	(8,783)
1362 Mellon Road [Member]
Initial Cost
Land	950	950
Building and Land Improvements	3,864	3,864
Costs Capitalized Subsequent to Acquisition	206	206
Gross Amounts Carried At Close of Period
Land	950	950
Building and Land Improvements	4,070	4,070
Total	5,020	5,020
Accumulated Depreciation	(414)	(414)
13857 McLearen Road [Member]
Initial Cost
Land	3,507	3,507
Building and Land Improvements	30,177	30,177
Costs Capitalized Subsequent to Acquisition	2,806	2,806
Gross Amounts Carried At Close of Period
Land	3,507	3,507
Building and Land Improvements	32,983	32,983
Total	36,490	36,490
Accumulated Depreciation	(10,850)	(10,850)
140 National Business Parkway [Member]
Initial Cost
Land	3,407	3,407
Building and Land Improvements	24,167	24,167
Costs Capitalized Subsequent to Acquisition	1,487	1,487
Gross Amounts Carried At Close of Period
Land	3,407	3,407
Building and Land Improvements	25,654	25,654
Total	29,061	29,061
Accumulated Depreciation	(9,577)	(9,577)
141 National Business Parkway [Member]
Initial Cost
Land	2,398	2,398
Building and Land Improvements	9,538	9,538
Costs Capitalized Subsequent to Acquisition	4,815	4,815
Gross Amounts Carried At Close of Period
Land	2,398	2,398
Building and Land Improvements	14,353	14,353
Total	16,751	16,751
Accumulated Depreciation	(8,006)	(8,006)
14280 Park Meadow Drive [Member]
Initial Cost
Land	3,731	3,731
Building and Land Improvements	15,953	15,953
Costs Capitalized Subsequent to Acquisition	3,039	3,039
Gross Amounts Carried At Close of Period
Land	3,731	3,731
Building and Land Improvements	18,992	18,992
Total	22,723	22,723
Accumulated Depreciation	(7,982)	(7,982)
1460 Dorsey Road [Member]
Initial Cost
Land	1,577	1,577
Building and Land Improvements	67	67
Gross Amounts Carried At Close of Period
Land	1,577	1,577
Building and Land Improvements	67	67
Total	1,644	1,644
14840 Conference Center Drive [Member]
Initial Cost
Land	1,572	1,572
Building and Land Improvements	8,175	8,175
Costs Capitalized Subsequent to Acquisition	3,433	3,433
Gross Amounts Carried At Close of Period
Land	1,572	1,572
Building and Land Improvements	11,608	11,608
Total	13,180	13,180
Accumulated Depreciation	(5,964)	(5,964)
14850 Conference Center Drive [Member]
Initial Cost
Land	1,615	1,615
Building and Land Improvements	8,358	8,358
Costs Capitalized Subsequent to Acquisition	3,108	3,108
Gross Amounts Carried At Close of Period
Land	1,615	1,615
Building and Land Improvements	11,466	11,466
Total	13,081	13,081
Accumulated Depreciation	(6,416)	(6,416)
14900 Conference Center Drive [Member]
Initial Cost
Land	3,436	3,436
Building and Land Improvements	14,402	14,402
Costs Capitalized Subsequent to Acquisition	7,817	7,817
Gross Amounts Carried At Close of Period
Land	3,436	3,436
Building and Land Improvements	22,219	22,219
Total	25,655	25,655
Accumulated Depreciation	(10,959)	(10,959)
1501 South Clinton Street [Member]
Initial Cost
Land	27,964	27,964
Building and Land Improvements	51,990	51,990
Costs Capitalized Subsequent to Acquisition	15,417	15,417
Gross Amounts Carried At Close of Period
Land	27,964	27,964
Building and Land Improvements	67,407	67,407
Total	95,371	95,371
Accumulated Depreciation	(22,475)	(22,475)
15049 Conference Center Drive [Member]
Initial Cost
Land	4,415	4,415
Building and Land Improvements	20,365	20,365
Costs Capitalized Subsequent to Acquisition	15,729	15,729
Gross Amounts Carried At Close of Period
Land	4,415	4,415
Building and Land Improvements	36,094	36,094
Total	40,509	40,509
Accumulated Depreciation	(13,957)	(13,957)
15059 Conference Center Drive [Member]
Initial Cost
Land	5,753	5,753
Building and Land Improvements	13,615	13,615
Costs Capitalized Subsequent to Acquisition	3,979	3,979
Gross Amounts Carried At Close of Period
Land	5,753	5,753
Building and Land Improvements	17,594	17,594
Total	23,347	23,347
Accumulated Depreciation	(8,680)	(8,680)
1550 West Nursery Road [Member]
Initial Cost
Land	14,071	14,071
Building and Land Improvements	16,930	16,930
Gross Amounts Carried At Close of Period
Land	14,071	14,071
Building and Land Improvements	16,930	16,930
Total	31,001	31,001
Accumulated Depreciation	(5,390)	(5,390)
1560 West Nursery Road [Member]
Initial Cost
Land	1,441	1,441
Building and Land Improvements	113	113
Gross Amounts Carried At Close of Period
Land	1,441	1,441
Building and Land Improvements	113	113
Total	1,554	1,554
Accumulated Depreciation	(13)	(13)
1610 West Nursery Road [Member]
Initial Cost
Land	259	259
Building and Land Improvements	246	246
Gross Amounts Carried At Close of Period
Land	259	259
Building and Land Improvements	246	246
Total	505	505
Accumulated Depreciation	(11)	(11)
1616 West Nursery Road [Member]
Initial Cost
Land	393	393
Building and Land Improvements	3,323	3,323
Gross Amounts Carried At Close of Period
Land	393	393
Building and Land Improvements	3,323	3,323
Total	3,716	3,716
Accumulated Depreciation	(98)	(98)
1622 West Nursery Road [Member]
Initial Cost
Land	393	393
Building and Land Improvements	2,542	2,542
Gross Amounts Carried At Close of Period
Land	393	393
Building and Land Improvements	2,542	2,542
Total	2,935	2,935
Accumulated Depreciation	(116)	(116)
16442 Commerce Drive [Member]
Initial Cost
Land	613	613
Building and Land Improvements	2,582	2,582
Costs Capitalized Subsequent to Acquisition	894	894
Gross Amounts Carried At Close of Period
Land	613	613
Building and Land Improvements	3,476	3,476
Total	4,089	4,089
Accumulated Depreciation	(1,635)	(1,635)
16480 Commerce Drive [Member]
Initial Cost
Land	1,856	1,856
Building and Land Improvements	7,154	7,154
Costs Capitalized Subsequent to Acquisition	2,170	2,170
Gross Amounts Carried At Close of Period
Land	1,856	1,856
Building and Land Improvements	9,324	9,324
Total	11,180	11,180
Accumulated Depreciation	(3,624)	(3,624)
16501 Commerce Drive [Member]
Initial Cost
Land	522	522
Building and Land Improvements	2,090	2,090
Costs Capitalized Subsequent to Acquisition	976	976
Gross Amounts Carried At Close of Period
Land	522	522
Building and Land Improvements	3,066	3,066
Total	3,588	3,588
Accumulated Depreciation	(1,112)	(1,112)
16539 Commerce Drive [Member]
Initial Cost
Land	688	688
Building and Land Improvements	2,860	2,860
Costs Capitalized Subsequent to Acquisition	2,188	2,188
Gross Amounts Carried At Close of Period
Land	688	688
Building and Land Improvements	5,048	5,048
Total	5,736	5,736
Accumulated Depreciation	(2,517)	(2,517)
16541 Commerce Drive [Member]
Initial Cost
Land	773	773
Building and Land Improvements	3,094	3,094
Costs Capitalized Subsequent to Acquisition	1,794	1,794
Gross Amounts Carried At Close of Period
Land	773	773
Building and Land Improvements	4,888	4,888
Total	5,661	5,661
Accumulated Depreciation	(2,197)	(2,197)
16543 Commerce Drive [Member]
Initial Cost
Land	436	436
Building and Land Improvements	1,742	1,742
Costs Capitalized Subsequent to Acquisition	716	716
Gross Amounts Carried At Close of Period
Land	436	436
Building and Land Improvements	2,458	2,458
Total	2,894	2,894
Accumulated Depreciation	(972)	(972)
1751 Pinnacle Drive [Member]
Initial Cost
Land	10,486	10,486
Building and Land Improvements	42,339	42,339
Costs Capitalized Subsequent to Acquisition	29,880	29,880
Gross Amounts Carried At Close of Period
Land	10,486	10,486
Building and Land Improvements	72,219	72,219
Total	82,705	82,705
Accumulated Depreciation	(32,435)	(32,435)
1753 Pinnacle Drive [Member]
Initial Cost
Land	8,275	8,275
Building and Land Improvements	34,353	34,353
Costs Capitalized Subsequent to Acquisition	20,778	20,778
Gross Amounts Carried At Close of Period
Land	8,275	8,275
Building and Land Improvements	55,131	55,131
Total	63,406	63,406
Accumulated Depreciation	(20,770)	(20,770)
206 Research Boulevard [Member]
Initial Cost
Land	0	0
Building and Land Improvements	0	0
Costs Capitalized Subsequent to Acquisition	0	0
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	0	0
Total	0	0
Accumulated Depreciation	0	0
209 Research Boulevard [Member]
Initial Cost
Land	134	134
Building and Land Improvements	1,711	1,711
Costs Capitalized Subsequent to Acquisition	265	265
Gross Amounts Carried At Close of Period
Land	134	134
Building and Land Improvements	1,976	1,976
Total	2,110	2,110
Accumulated Depreciation	(381)	(381)
210 Research Boulevard [Member]
Initial Cost
Land	113	113
Building and Land Improvements	1,402	1,402
Costs Capitalized Subsequent to Acquisition	204	204
Gross Amounts Carried At Close of Period
Land	113	113
Building and Land Improvements	1,606	1,606
Total	1,719	1,719
Accumulated Depreciation	(271)	(271)
2100 L Street [Member]
Real Estate and Accumulated Depreciation
Encumbrances	13,577	13,577
Initial Cost
Land	56,351	56,351
Building and Land Improvements	19,446	19,446
Gross Amounts Carried At Close of Period
Land	56,351	56,351
Building and Land Improvements	19,446	19,446
Total	75,797	75,797
2100 Rideout Road [Member]
Initial Cost
Land	0	0
Building and Land Improvements	5,492	5,492
Costs Capitalized Subsequent to Acquisition	2,881	2,881
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	8,373	8,373
Total	8,373	8,373
Accumulated Depreciation	(866)	(866)
22289 Exploration Drive [Member]
Initial Cost
Land	1,422	1,422
Building and Land Improvements	5,594	5,594
Costs Capitalized Subsequent to Acquisition	1,867	1,867
Gross Amounts Carried At Close of Period
Land	1,422	1,422
Building and Land Improvements	7,461	7,461
Total	8,883	8,883
Accumulated Depreciation	(3,598)	(3,598)
22299 Exploration Drive [Member]
Initial Cost
Land	1,362	1,362
Building and Land Improvements	5,685	5,685
Costs Capitalized Subsequent to Acquisition	2,550	2,550
Gross Amounts Carried At Close of Period
Land	1,362	1,362
Building and Land Improvements	8,235	8,235
Total	9,597	9,597
Accumulated Depreciation	(4,040)	(4,040)
22300 Exploration Drive [Member]
Initial Cost
Land	1,094	1,094
Building and Land Improvements	4,929	4,929
Costs Capitalized Subsequent to Acquisition	2,522	2,522
Gross Amounts Carried At Close of Period
Land	1,094	1,094
Building and Land Improvements	7,451	7,451
Total	8,545	8,545
Accumulated Depreciation	(2,658)	(2,658)
22309 Exploration Drive [Member]
Initial Cost
Land	2,243	2,243
Building and Land Improvements	10,419	10,419
Costs Capitalized Subsequent to Acquisition	7,983	7,983
Gross Amounts Carried At Close of Period
Land	2,243	2,243
Building and Land Improvements	18,402	18,402
Total	20,645	20,645
Accumulated Depreciation	(6,799)	(6,799)
23535 Cottonwood Parkway [Member]
Initial Cost
Land	692	692
Building and Land Improvements	3,051	3,051
Costs Capitalized Subsequent to Acquisition	571	571
Gross Amounts Carried At Close of Period
Land	692	692
Building and Land Improvements	3,622	3,622
Total	4,314	4,314
Accumulated Depreciation	(1,695)	(1,695)
250 W Pratt St [Member]
Initial Cost
Land	8,057	8,057
Building and Land Improvements	34,588	34,588
Costs Capitalized Subsequent to Acquisition	10,557	10,557
Gross Amounts Carried At Close of Period
Land	8,057	8,057
Building and Land Improvements	45,145	45,145
Total	53,202	53,202
Accumulated Depreciation	(10,084)	(10,084)
2500 Riva Road [Member]
Initial Cost
Land	2,791	2,791
Building and Land Improvements	12,193	12,193
Costs Capitalized Subsequent to Acquisition	1	1
Gross Amounts Carried At Close of Period
Land	2,791	2,791
Building and Land Improvements	12,194	12,194
Total	14,985	14,985
Accumulated Depreciation	(6,467)	(6,467)
2600 Park Tower Drive [Member]
Initial Cost
Land	20,304	20,304
Building and Land Improvements	34,443	34,443
Costs Capitalized Subsequent to Acquisition	711	711
Gross Amounts Carried At Close of Period
Land	20,304	20,304
Building and Land Improvements	35,154	35,154
Total	55,458	55,458
Accumulated Depreciation	(4,939)	(4,939)
2691 Technology Drive [Member]
Initial Cost
Land	2,098	2,098
Building and Land Improvements	17,334	17,334
Costs Capitalized Subsequent to Acquisition	5,557	5,557
Gross Amounts Carried At Close of Period
Land	2,098	2,098
Building and Land Improvements	22,891	22,891
Total	24,989	24,989
Accumulated Depreciation	(10,541)	(10,541)
2701 Technology Drive [Member]
Initial Cost
Land	1,737	1,737
Building and Land Improvements	15,266	15,266
Costs Capitalized Subsequent to Acquisition	5,034	5,034
Gross Amounts Carried At Close of Period
Land	1,737	1,737
Building and Land Improvements	20,300	20,300
Total	22,037	22,037
Accumulated Depreciation	(10,559)	(10,559)
2711 Technology Drive [Member]
Initial Cost
Land	2,251	2,251
Building and Land Improvements	21,611	21,611
Costs Capitalized Subsequent to Acquisition	2,282	2,282
Gross Amounts Carried At Close of Period
Land	2,251	2,251
Building and Land Improvements	23,893	23,893
Total	26,144	26,144
Accumulated Depreciation	(12,299)	(12,299)
2720 Technology Drive [Member]
Initial Cost
Land	3,863	3,863
Building and Land Improvements	29,272	29,272
Costs Capitalized Subsequent to Acquisition	1,218	1,218
Gross Amounts Carried At Close of Period
Land	3,863	3,863
Building and Land Improvements	30,490	30,490
Total	34,353	34,353
Accumulated Depreciation	(11,349)	(11,349)
2721 Technology Drive [Member]
Initial Cost
Land	4,611	4,611
Building and Land Improvements	14,597	14,597
Costs Capitalized Subsequent to Acquisition	2,801	2,801
Gross Amounts Carried At Close of Period
Land	4,611	4,611
Building and Land Improvements	17,398	17,398
Total	22,009	22,009
Accumulated Depreciation	(8,280)	(8,280)
2730 Hercules Road [Member]
Initial Cost
Land	8,737	8,737
Building and Land Improvements	31,612	31,612
Costs Capitalized Subsequent to Acquisition	8,697	8,697
Gross Amounts Carried At Close of Period
Land	8,737	8,737
Building and Land Improvements	40,309	40,309
Total	49,046	49,046
Accumulated Depreciation	(20,174)	(20,174)
30 Light Street [Member]
Real Estate and Accumulated Depreciation
Encumbrances	4,078	4,078
Initial Cost
Land	0	0
Building and Land Improvements	12,101	12,101
Costs Capitalized Subsequent to Acquisition	867	867
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	12,968	12,968
Total	12,968	12,968
Accumulated Depreciation	(1,113)	(1,113)
300 Sentinel Drive [Member]
Initial Cost
Land	1,517	1,517
Building and Land Improvements	59,165	59,165
Costs Capitalized Subsequent to Acquisition	1,201	1,201
Gross Amounts Carried At Close of Period
Land	1,517	1,517
Building and Land Improvements	60,366	60,366
Total	61,883	61,883
Accumulated Depreciation	(13,166)	(13,166)
302 Sentinel Drive [Member]
Initial Cost
Land	2,648	2,648
Building and Land Improvements	29,687	29,687
Costs Capitalized Subsequent to Acquisition	777	777
Gross Amounts Carried At Close of Period
Land	2,648	2,648
Building and Land Improvements	30,464	30,464
Total	33,112	33,112
Accumulated Depreciation	(8,381)	(8,381)
304 Sentinel Drive [Member]
Initial Cost
Land	3,411	3,411
Building and Land Improvements	24,917	24,917
Costs Capitalized Subsequent to Acquisition	1,814	1,814
Gross Amounts Carried At Close of Period
Land	3,411	3,411
Building and Land Improvements	26,731	26,731
Total	30,142	30,142
Accumulated Depreciation	(8,441)	(8,441)
306 Sentinel Drive [Member]
Initial Cost
Land	3,260	3,260
Building and Land Improvements	22,592	22,592
Costs Capitalized Subsequent to Acquisition	1,239	1,239
Gross Amounts Carried At Close of Period
Land	3,260	3,260
Building and Land Improvements	23,831	23,831
Total	27,091	27,091
Accumulated Depreciation	(7,357)	(7,357)
308 Sentinel Drive [Member]
Initial Cost
Land	1,422	1,422
Building and Land Improvements	26,208	26,208
Costs Capitalized Subsequent to Acquisition	2,330	2,330
Gross Amounts Carried At Close of Period
Land	1,422	1,422
Building and Land Improvements	28,538	28,538
Total	29,960	29,960
Accumulated Depreciation	(5,245)	(5,245)
310 Sentinel Way [Member]
Initial Cost
Land	2,372	2,372
Building and Land Improvements	39,990	39,990
Gross Amounts Carried At Close of Period
Land	2,372	2,372
Building and Land Improvements	39,990	39,990
Total	42,362	42,362
Accumulated Depreciation	(2,956)	(2,956)
310 The Bridge Street [Member]
Initial Cost
Land	261	261
Building and Land Improvements	26,531	26,531
Costs Capitalized Subsequent to Acquisition	4,088	4,088
Gross Amounts Carried At Close of Period
Land	261	261
Building and Land Improvements	30,619	30,619
Total	30,880	30,880
Accumulated Depreciation	(8,677)	(8,677)
312 Sentinel Way [Member]
Initial Cost
Land	3,138	3,138
Building and Land Improvements	27,797	27,797
Gross Amounts Carried At Close of Period
Land	3,138	3,138
Building and Land Improvements	27,797	27,797
Total	30,935	30,935
Accumulated Depreciation	(2,999)	(2,999)
314 Sentinel Way [Member]
Initial Cost
Land	1,254	1,254
Building and Land Improvements	7,741	7,741
Gross Amounts Carried At Close of Period
Land	1,254	1,254
Building and Land Improvements	7,741	7,741
Total	8,995	8,995
Accumulated Depreciation	(781)	(781)
316 Sentinel Way [Member]
Initial Cost
Land	2,748	2,748
Building and Land Improvements	38,156	38,156
Costs Capitalized Subsequent to Acquisition	145	145
Gross Amounts Carried At Close of Period
Land	2,748	2,748
Building and Land Improvements	38,301	38,301
Total	41,049	41,049
Accumulated Depreciation	(6,475)	(6,475)
318 Sentinel Way [Member]
Initial Cost
Land	2,185	2,185
Building and Land Improvements	28,426	28,426
Costs Capitalized Subsequent to Acquisition	560	560
Gross Amounts Carried At Close of Period
Land	2,185	2,185
Building and Land Improvements	28,986	28,986
Total	31,171	31,171
Accumulated Depreciation	(9,182)	(9,182)
320 Sentinel Way [Member]
Initial Cost
Land	2,067	2,067
Building and Land Improvements	21,623	21,623
Costs Capitalized Subsequent to Acquisition	65	65
Gross Amounts Carried At Close of Period
Land	2,067	2,067
Building and Land Improvements	21,688	21,688
Total	23,755	23,755
Accumulated Depreciation	(5,935)	(5,935)
322 Sentinel Way [Member]
Initial Cost
Land	2,605	2,605
Building and Land Improvements	22,827	22,827
Costs Capitalized Subsequent to Acquisition	1,900	1,900
Gross Amounts Carried At Close of Period
Land	2,605	2,605
Building and Land Improvements	24,727	24,727
Total	27,332	27,332
Accumulated Depreciation	(7,047)	(7,047)
324 Sentinel Way [Member]
Initial Cost
Land	1,656	1,656
Building and Land Improvements	23,018	23,018
Gross Amounts Carried At Close of Period
Land	1,656	1,656
Building and Land Improvements	23,018	23,018
Total	24,674	24,674
Accumulated Depreciation	(4,805)	(4,805)
4000 Market Street [Member]
Initial Cost
Land	0	0
Building and Land Improvements	6,820	6,820
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	6,820	6,820
Total	6,820	6,820
Accumulated Depreciation	(7)	(7)
4100 Market Street [Member]
Initial Cost
Land	0	0
Building and Land Improvements	4,612	4,612
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	4,612	4,612
Total	4,612	4,612
410 National Business Parkway [Member]
Initial Cost
Land	1,831	1,831
Building and Land Improvements	23,257	23,257
Costs Capitalized Subsequent to Acquisition	119	119
Gross Amounts Carried At Close of Period
Land	1,831	1,831
Building and Land Improvements	23,376	23,376
Total	25,207	25,207
Accumulated Depreciation	(3,497)	(3,497)
420 National Business Parkway [Member]
Initial Cost
Land	2,370	2,370
Building and Land Improvements	27,751	27,751
Costs Capitalized Subsequent to Acquisition	108	108
Gross Amounts Carried At Close of Period
Land	2,370	2,370
Building and Land Improvements	27,859	27,859
Total	30,229	30,229
Accumulated Depreciation	(3,340)	(3,340)
430 National Business Parkway [Member]
Initial Cost
Land	1,852	1,852
Building and Land Improvements	21,563	21,563
Costs Capitalized Subsequent to Acquisition	127	127
Gross Amounts Carried At Close of Period
Land	1,852	1,852
Building and Land Improvements	21,690	21,690
Total	23,542	23,542
Accumulated Depreciation	(3,680)	(3,680)
44408 Pecan Court [Member]
Initial Cost
Land	817	817
Building and Land Improvements	1,464	1,464
Costs Capitalized Subsequent to Acquisition	1,691	1,691
Gross Amounts Carried At Close of Period
Land	817	817
Building and Land Improvements	3,155	3,155
Total	3,972	3,972
Accumulated Depreciation	(1,079)	(1,079)
44414 Pecan Court [Member]
Initial Cost
Land	405	405
Building and Land Improvements	1,619	1,619
Costs Capitalized Subsequent to Acquisition	1,065	1,065
Gross Amounts Carried At Close of Period
Land	405	405
Building and Land Improvements	2,684	2,684
Total	3,089	3,089
Accumulated Depreciation	(1,137)	(1,137)
44417 Pecan Court [Member]
Initial Cost
Land	434	434
Building and Land Improvements	3,794	3,794
Costs Capitalized Subsequent to Acquisition	208	208
Gross Amounts Carried At Close of Period
Land	434	434
Building and Land Improvements	4,002	4,002
Total	4,436	4,436
Accumulated Depreciation	(1,624)	(1,624)
44420 Pecan Court [Member]
Initial Cost
Land	344	344
Building and Land Improvements	880	880
Costs Capitalized Subsequent to Acquisition	270	270
Gross Amounts Carried At Close of Period
Land	344	344
Building and Land Improvements	1,150	1,150
Total	1,494	1,494
Accumulated Depreciation	(423)	(423)
44425 Pecan Court [Member]
Initial Cost
Land	1,309	1,309
Building and Land Improvements	3,506	3,506
Costs Capitalized Subsequent to Acquisition	2,123	2,123
Gross Amounts Carried At Close of Period
Land	1,309	1,309
Building and Land Improvements	5,629	5,629
Total	6,938	6,938
Accumulated Depreciation	(2,750)	(2,750)
45310 Abell House Lane [Member]
Initial Cost
Land	2,272	2,272
Building and Land Improvements	13,808	13,808
Costs Capitalized Subsequent to Acquisition	471	471
Gross Amounts Carried At Close of Period
Land	2,272	2,272
Building and Land Improvements	14,279	14,279
Total	16,551	16,551
Accumulated Depreciation	(2,455)	(2,455)
46579 Expedition Drive [Member]
Initial Cost
Land	1,406	1,406
Building and Land Improvements	5,796	5,796
Costs Capitalized Subsequent to Acquisition	1,831	1,831
Gross Amounts Carried At Close of Period
Land	1,406	1,406
Building and Land Improvements	7,627	7,627
Total	9,033	9,033
Accumulated Depreciation	(3,664)	(3,664)
46591 Expedition Drive [Member]
Initial Cost
Land	1,200	1,200
Building and Land Improvements	7,199	7,199
Costs Capitalized Subsequent to Acquisition	1,977	1,977
Gross Amounts Carried At Close of Period
Land	1,200	1,200
Building and Land Improvements	9,176	9,176
Total	10,376	10,376
Accumulated Depreciation	(3,052)	(3,052)
4851 Stonecroft Boulevard [Member]
Initial Cost
Land	1,878	1,878
Building and Land Improvements	11,558	11,558
Costs Capitalized Subsequent to Acquisition	34	34
Gross Amounts Carried At Close of Period
Land	1,878	1,878
Building and Land Improvements	11,592	11,592
Total	13,470	13,470
Accumulated Depreciation	(4,116)	(4,116)
540 National Business Parkway [Member]
Initial Cost
Land	2,035	2,035
Building and Land Improvements	29,608	29,608
Gross Amounts Carried At Close of Period
Land	2,035	2,035
Building and Land Improvements	29,608	29,608
Total	31,643	31,643
Accumulated Depreciation	(934)	(934)
5520 Research Park Drive [Member]
Initial Cost
Land	0	0
Building and Land Improvements	20,072	20,072
Costs Capitalized Subsequent to Acquisition	1,327	1,327
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	21,399	21,399
Total	21,399	21,399
Accumulated Depreciation	(4,886)	(4,886)
5522 Research Park Drive [Member]
Initial Cost
Land	0	0
Building and Land Improvements	4,550	4,550
Costs Capitalized Subsequent to Acquisition	210	210
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	4,760	4,760
Total	4,760	4,760
Accumulated Depreciation	(1,313)	(1,313)
5801 University Research Court [Member]
Initial Cost
Land	0	0
Building and Land Improvements	15,936	15,936
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	15,936	15,936
Total	15,936	15,936
Accumulated Depreciation	(240)	(240)
5825 University Research Court [Member]
Real Estate and Accumulated Depreciation
Encumbrances	20,875	20,875
Initial Cost
Land	0	0
Building and Land Improvements	22,771	22,771
Costs Capitalized Subsequent to Acquisition	783	783
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	23,554	23,554
Total	23,554	23,554
Accumulated Depreciation	(5,680)	(5,680)
5850 University Research Court [Member]
Real Estate and Accumulated Depreciation
Encumbrances	22,085	22,085
Initial Cost
Land	0	0
Building and Land Improvements	31,906	31,906
Costs Capitalized Subsequent to Acquisition	405	405
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	32,311	32,311
Total	32,311	32,311
Accumulated Depreciation	(7,165)	(7,165)
6700 Alexander Bell Drive [Member]
Initial Cost
Land	1,755	1,755
Building and Land Improvements	7,019	7,019
Costs Capitalized Subsequent to Acquisition	7,509	7,509
Gross Amounts Carried At Close of Period
Land	1,755	1,755
Building and Land Improvements	14,528	14,528
Total	16,283	16,283
Accumulated Depreciation	(7,484)	(7,484)
6708 Alexander Bell Drive [Member]
Initial Cost
Land	897	897
Building and Land Improvements	12,631	12,631
Costs Capitalized Subsequent to Acquisition	1,622	1,622
Gross Amounts Carried At Close of Period
Land	897	897
Building and Land Improvements	14,253	14,253
Total	15,150	15,150
Accumulated Depreciation	(4,111)	(4,111)
6711 Columbia Gateway Drive [Member]
Initial Cost
Land	2,683	2,683
Building and Land Improvements	23,239	23,239
Costs Capitalized Subsequent to Acquisition	1,550	1,550
Gross Amounts Carried At Close of Period
Land	2,683	2,683
Building and Land Improvements	24,789	24,789
Total	27,472	27,472
Accumulated Depreciation	(7,598)	(7,598)
6716 Alexander Bell Drive [Member]
Initial Cost
Land	1,242	1,242
Building and Land Improvements	4,969	4,969
Costs Capitalized Subsequent to Acquisition	4,285	4,285
Gross Amounts Carried At Close of Period
Land	1,242	1,242
Building and Land Improvements	9,254	9,254
Total	10,496	10,496
Accumulated Depreciation	(5,506)	(5,506)
6721 Columbia Gateway Drive [Member]
Initial Cost
Land	1,753	1,753
Building and Land Improvements	34,090	34,090
Costs Capitalized Subsequent to Acquisition	122	122
Gross Amounts Carried At Close of Period
Land	1,753	1,753
Building and Land Improvements	34,212	34,212
Total	35,965	35,965
Accumulated Depreciation	(8,373)	(8,373)
6724 Alexander Bell Drive [Member]
Initial Cost
Land	449	449
Building and Land Improvements	5,039	5,039
Costs Capitalized Subsequent to Acquisition	1,535	1,535
Gross Amounts Carried At Close of Period
Land	449	449
Building and Land Improvements	6,574	6,574
Total	7,023	7,023
Accumulated Depreciation	(2,946)	(2,946)
6731 Columbia Gateway Drive [Member]
Initial Cost
Land	2,807	2,807
Building and Land Improvements	19,098	19,098
Costs Capitalized Subsequent to Acquisition	4,921	4,921
Gross Amounts Carried At Close of Period
Land	2,807	2,807
Building and Land Improvements	24,019	24,019
Total	26,826	26,826
Accumulated Depreciation	(11,156)	(11,156)
6740 Alexander Bell Drive [Member]
Initial Cost
Land	1,424	1,424
Building and Land Improvements	5,696	5,696
Costs Capitalized Subsequent to Acquisition	3,441	3,441
Gross Amounts Carried At Close of Period
Land	1,424	1,424
Building and Land Improvements	9,137	9,137
Total	10,561	10,561
Accumulated Depreciation	(5,875)	(5,875)
6741 Columbia Gateway Drive [Member]
Initial Cost
Land	675	675
Building and Land Improvements	1,711	1,711
Costs Capitalized Subsequent to Acquisition	154	154
Gross Amounts Carried At Close of Period
Land	675	675
Building and Land Improvements	1,865	1,865
Total	2,540	2,540
Accumulated Depreciation	(521)	(521)
6750 Alexander Bell Drive [Member]
Initial Cost
Land	1,263	1,263
Building and Land Improvements	12,461	12,461
Costs Capitalized Subsequent to Acquisition	4,981	4,981
Gross Amounts Carried At Close of Period
Land	1,263	1,263
Building and Land Improvements	17,442	17,442
Total	18,705	18,705
Accumulated Depreciation	(9,484)	(9,484)
6760 Alexander Bell Drive [Member]
Initial Cost
Land	890	890
Building and Land Improvements	3,561	3,561
Costs Capitalized Subsequent to Acquisition	3,830	3,830
Gross Amounts Carried At Close of Period
Land	890	890
Building and Land Improvements	7,391	7,391
Total	8,281	8,281
Accumulated Depreciation	(4,272)	(4,272)
6940 Columbia Gateway Drive [Member]
Initial Cost
Land	3,545	3,545
Building and Land Improvements	9,916	9,916
Costs Capitalized Subsequent to Acquisition	7,330	7,330
Gross Amounts Carried At Close of Period
Land	3,545	3,545
Building and Land Improvements	17,246	17,246
Total	20,791	20,791
Accumulated Depreciation	(9,035)	(9,035)
6950 Columbia Gateway Drive [Member]
Initial Cost
Land	3,596	3,596
Building and Land Improvements	15,738	15,738
Costs Capitalized Subsequent to Acquisition	3,220	3,220
Gross Amounts Carried At Close of Period
Land	3,596	3,596
Building and Land Improvements	18,958	18,958
Total	22,554	22,554
Accumulated Depreciation	(10,912)	(10,912)
7000 Columbia Gateway Drive [Member]
Initial Cost
Land	3,131	3,131
Building and Land Improvements	12,103	12,103
Costs Capitalized Subsequent to Acquisition	6,479	6,479
Gross Amounts Carried At Close of Period
Land	3,131	3,131
Building and Land Improvements	18,582	18,582
Total	21,713	21,713
Accumulated Depreciation	(7,126)	(7,126)
7005 Columbia Gateway Drive [Member]
Initial Cost
Land	3,036	3,036
Building and Land Improvements	747	747
Gross Amounts Carried At Close of Period
Land	3,036	3,036
Building and Land Improvements	747	747
Total	3,783	3,783
7015 Albert Einstein Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	412	412
Initial Cost
Land	2,058	2,058
Building and Land Improvements	6,093	6,093
Costs Capitalized Subsequent to Acquisition	3,319	3,319
Gross Amounts Carried At Close of Period
Land	2,058	2,058
Building and Land Improvements	9,412	9,412
Total	11,470	11,470
Accumulated Depreciation	(3,746)	(3,746)
7061 Columbia Gateway Drive [Member]
Initial Cost
Land	729	729
Building and Land Improvements	3,094	3,094
Costs Capitalized Subsequent to Acquisition	2,018	2,018
Gross Amounts Carried At Close of Period
Land	729	729
Building and Land Improvements	5,112	5,112
Total	5,841	5,841
Accumulated Depreciation	(2,747)	(2,747)
7063 Columbia Gateway Drive [Member]
Initial Cost
Land	902	902
Building and Land Improvements	3,684	3,684
Costs Capitalized Subsequent to Acquisition	3,416	3,416
Gross Amounts Carried At Close of Period
Land	902	902
Building and Land Improvements	7,100	7,100
Total	8,002	8,002
Accumulated Depreciation	(3,553)	(3,553)
7065 Columbia Gateway Drive [Member]
Initial Cost
Land	919	919
Building and Land Improvements	3,763	3,763
Costs Capitalized Subsequent to Acquisition	3,095	3,095
Gross Amounts Carried At Close of Period
Land	919	919
Building and Land Improvements	6,858	6,858
Total	7,777	7,777
Accumulated Depreciation	(4,070)	(4,070)
7067 Columbia Gateway Drive [Member]
Initial Cost
Land	1,829	1,829
Building and Land Improvements	11,823	11,823
Costs Capitalized Subsequent to Acquisition	4,480	4,480
Gross Amounts Carried At Close of Period
Land	1,829	1,829
Building and Land Improvements	16,303	16,303
Total	18,132	18,132
Accumulated Depreciation	(7,496)	(7,496)
7125 Columbia Gateway Drive [Member]
Initial Cost
Land	20,487	20,487
Building and Land Improvements	46,994	46,994
Costs Capitalized Subsequent to Acquisition	18,044	18,044
Gross Amounts Carried At Close of Period
Land	20,487	20,487
Building and Land Improvements	65,038	65,038
Total	85,525	85,525
Accumulated Depreciation	(23,141)	(23,141)
7130 Columbia Gateway Drive [Member]
Initial Cost
Land	1,350	1,350
Building and Land Improvements	4,359	4,359
Costs Capitalized Subsequent to Acquisition	2,559	2,559
Gross Amounts Carried At Close of Period
Land	1,350	1,350
Building and Land Improvements	6,918	6,918
Total	8,268	8,268
Accumulated Depreciation	(3,396)	(3,396)
7134 Columbia Gateway Drive [Member]
Initial Cost
Land	704	704
Building and Land Improvements	4,700	4,700
Costs Capitalized Subsequent to Acquisition	353	353
Gross Amounts Carried At Close of Period
Land	704	704
Building and Land Improvements	5,053	5,053
Total	5,757	5,757
Accumulated Depreciation	(1,540)	(1,540)
7138 Columbia Gateway Drive [Member]
Initial Cost
Land	1,104	1,104
Building and Land Improvements	3,518	3,518
Costs Capitalized Subsequent to Acquisition	2,843	2,843
Gross Amounts Carried At Close of Period
Land	1,104	1,104
Building and Land Improvements	6,361	6,361
Total	7,465	7,465
Accumulated Depreciation	(3,658)	(3,658)
7142 Columbia Gateway Drive [Member]
Initial Cost
Land	1,342	1,342
Building and Land Improvements	7,158	7,158
Costs Capitalized Subsequent to Acquisition	2,608	2,608
Gross Amounts Carried At Close of Period
Land	1,342	1,342
Building and Land Improvements	9,766	9,766
Total	11,108	11,108
Accumulated Depreciation	(3,137)	(3,137)
7150 Columbia Gateway Drive [Member]
Initial Cost
Land	1,032	1,032
Building and Land Improvements	3,429	3,429
Costs Capitalized Subsequent to Acquisition	813	813
Gross Amounts Carried At Close of Period
Land	1,032	1,032
Building and Land Improvements	4,242	4,242
Total	5,274	5,274
Accumulated Depreciation	(1,557)	(1,557)
7150 Riverwood Drive [Member]
Initial Cost
Land	1,821	1,821
Building and Land Improvements	4,388	4,388
Costs Capitalized Subsequent to Acquisition	1,824	1,824
Gross Amounts Carried At Close of Period
Land	1,821	1,821
Building and Land Improvements	6,212	6,212
Total	8,033	8,033
Accumulated Depreciation	(2,570)	(2,570)
7160 Riverwood Drive [Member]
Initial Cost
Land	2,732	2,732
Building and Land Improvements	7,006	7,006
Costs Capitalized Subsequent to Acquisition	2,490	2,490
Gross Amounts Carried At Close of Period
Land	2,732	2,732
Building and Land Improvements	9,496	9,496
Total	12,228	12,228
Accumulated Depreciation	(4,050)	(4,050)
7170 Riverwood Drive [Member]
Initial Cost
Land	1,283	1,283
Building and Land Improvements	3,096	3,096
Costs Capitalized Subsequent to Acquisition	1,704	1,704
Gross Amounts Carried At Close of Period
Land	1,283	1,283
Building and Land Improvements	4,800	4,800
Total	6,083	6,083
Accumulated Depreciation	(2,026)	(2,026)
7175 Riverwood Drive [Member]
Initial Cost
Land	1,788	1,788
Building and Land Improvements	7,269	7,269
Gross Amounts Carried At Close of Period
Land	1,788	1,788
Building and Land Improvements	7,269	7,269
Total	9,057	9,057
Accumulated Depreciation	(934)	(934)
7200 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	6,121	6,121
Initial Cost
Land	0	0
Building and Land Improvements	8,348	8,348
Costs Capitalized Subsequent to Acquisition	5	5
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	8,353	8,353
Total	8,353	8,353
Accumulated Depreciation	(963)	(963)
7200 Riverwood Road [Member]
Initial Cost
Land	4,089	4,089
Building and Land Improvements	22,630	22,630
Costs Capitalized Subsequent to Acquisition	4,538	4,538
Gross Amounts Carried At Close of Period
Land	4,089	4,089
Building and Land Improvements	27,168	27,168
Total	31,257	31,257
Accumulated Depreciation	(11,024)	(11,024)
7205 Riverwood Drive [Member]
Initial Cost
Land	1,367	1,367
Building and Land Improvements	21,419	21,419
Gross Amounts Carried At Close of Period
Land	1,367	1,367
Building and Land Improvements	21,419	21,419
Total	22,786	22,786
Accumulated Depreciation	(2,916)	(2,916)
7272 Park Circle Drive [Member]
Initial Cost
Land	1,479	1,479
Building and Land Improvements	6,300	6,300
Costs Capitalized Subsequent to Acquisition	4,578	4,578
Gross Amounts Carried At Close of Period
Land	1,479	1,479
Building and Land Improvements	10,878	10,878
Total	12,357	12,357
Accumulated Depreciation	(4,427)	(4,427)
7318 Parkway Drive [Member]
Initial Cost
Land	972	972
Building and Land Improvements	3,888	3,888
Costs Capitalized Subsequent to Acquisition	1,250	1,250
Gross Amounts Carried At Close of Period
Land	972	972
Building and Land Improvements	5,138	5,138
Total	6,110	6,110
Accumulated Depreciation	(2,566)	(2,566)
7400 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	6,713	6,713
Initial Cost
Land	0	0
Building and Land Improvements	9,223	9,223
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	9,223	9,223
Total	9,223	9,223
Accumulated Depreciation	(813)	(813)
7467 Ridge Road [Member]
Initial Cost
Land	1,565	1,565
Building and Land Improvements	3,116	3,116
Costs Capitalized Subsequent to Acquisition	4,428	4,428
Gross Amounts Carried At Close of Period
Land	1,565	1,565
Building and Land Improvements	7,544	7,544
Total	9,109	9,109
Accumulated Depreciation	(2,699)	(2,699)
7740 Milestone Parkway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	17,786	17,786
Initial Cost
Land	3,825	3,825
Building and Land Improvements	34,176	34,176
Costs Capitalized Subsequent to Acquisition	567	567
Gross Amounts Carried At Close of Period
Land	3,825	3,825
Building and Land Improvements	34,743	34,743
Total	38,568	38,568
Accumulated Depreciation	(7,395)	(7,395)
7770 Backlick Road [Member]
Initial Cost
Land	6,387	6,387
Building and Land Improvements	76,593	76,593
Costs Capitalized Subsequent to Acquisition	300	300
Gross Amounts Carried At Close of Period
Land	6,387	6,387
Building and Land Improvements	76,893	76,893
Total	83,280	83,280
Accumulated Depreciation	(11,016)	(11,016)
7880 Milestone Parkway [Member]
Initial Cost
Land	4,857	4,857
Building and Land Improvements	25,925	25,925
Costs Capitalized Subsequent to Acquisition	200	200
Gross Amounts Carried At Close of Period
Land	4,857	4,857
Building and Land Improvements	26,125	26,125
Total	30,982	30,982
Accumulated Depreciation	(2,023)	(2,023)
8621 Robert Fulton Drive [Member]
Initial Cost
Land	2,317	2,317
Building and Land Improvements	12,642	12,642
Costs Capitalized Subsequent to Acquisition	6,437	6,437
Gross Amounts Carried At Close of Period
Land	2,317	2,317
Building and Land Improvements	19,079	19,079
Total	21,396	21,396
Accumulated Depreciation	(4,777)	(4,777)
8661 Robert Fulton Drive [Member]
Initial Cost
Land	1,510	1,510
Building and Land Improvements	3,764	3,764
Costs Capitalized Subsequent to Acquisition	2,453	2,453
Gross Amounts Carried At Close of Period
Land	1,510	1,510
Building and Land Improvements	6,217	6,217
Total	7,727	7,727
Accumulated Depreciation	(2,926)	(2,926)
8671 Robert Fulton Drive [Member]
Initial Cost
Land	1,718	1,718
Building and Land Improvements	4,280	4,280
Costs Capitalized Subsequent to Acquisition	4,233	4,233
Gross Amounts Carried At Close of Period
Land	1,718	1,718
Building and Land Improvements	8,513	8,513
Total	10,231	10,231
Accumulated Depreciation	(4,021)	(4,021)
870 Elkridge Landing Road [Member]
Initial Cost
Land	2,003	2,003
Building and Land Improvements	9,442	9,442
Costs Capitalized Subsequent to Acquisition	9,301	9,301
Gross Amounts Carried At Close of Period
Land	2,003	2,003
Building and Land Improvements	18,743	18,743
Total	20,746	20,746
Accumulated Depreciation	(9,936)	(9,936)
8800 Redstone Gateway [Member]
Initial Cost
Land	0	0
Building and Land Improvements	992	992
Costs Capitalized Subsequent to Acquisition	0	0
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	992	992
Total	992	992
Accumulated Depreciation	0	0
891 Elkridge Landing Road [Member]
Initial Cost
Land	1,165	1,165
Building and Land Improvements	4,772	4,772
Costs Capitalized Subsequent to Acquisition	3,450	3,450
Gross Amounts Carried At Close of Period
Land	1,165	1,165
Building and Land Improvements	8,222	8,222
Total	9,387	9,387
Accumulated Depreciation	(4,582)	(4,582)
901 Elkridge Landing Road [Member]
Initial Cost
Land	1,156	1,156
Building and Land Improvements	4,437	4,437
Costs Capitalized Subsequent to Acquisition	3,383	3,383
Gross Amounts Carried At Close of Period
Land	1,156	1,156
Building and Land Improvements	7,820	7,820
Total	8,976	8,976
Accumulated Depreciation	(3,955)	(3,955)
911 Elkridge Landing Road [Member]
Initial Cost
Land	1,215	1,215
Building and Land Improvements	4,861	4,861
Costs Capitalized Subsequent to Acquisition	2,901	2,901
Gross Amounts Carried At Close of Period
Land	1,215	1,215
Building and Land Improvements	7,762	7,762
Total	8,977	8,977
Accumulated Depreciation	(4,170)	(4,170)
938 Elkridge Landing Road [Member]
Initial Cost
Land	922	922
Building and Land Improvements	4,748	4,748
Costs Capitalized Subsequent to Acquisition	1,446	1,446
Gross Amounts Carried At Close of Period
Land	922	922
Building and Land Improvements	6,194	6,194
Total	7,116	7,116
Accumulated Depreciation	(2,828)	(2,828)
939 Elkridge Landing Road [Member]
Initial Cost
Land	939	939
Building and Land Improvements	3,756	3,756
Costs Capitalized Subsequent to Acquisition	4,438	4,438
Gross Amounts Carried At Close of Period
Land	939	939
Building and Land Improvements	8,194	8,194
Total	9,133	9,133
Accumulated Depreciation	(4,642)	(4,642)
9651 Hornbaker Road [Member]
Initial Cost
Land	6,050	6,050
Building and Land Improvements	251,367	251,367
Costs Capitalized Subsequent to Acquisition	4,689	4,689
Gross Amounts Carried At Close of Period
Land	6,050	6,050
Building and Land Improvements	256,056	256,056
Total	262,106	262,106
Accumulated Depreciation	(50,191)	(50,191)
Arundel Preserve [Member]
Initial Cost
Land	13,401	13,401
Building and Land Improvements	9,583	9,583
Gross Amounts Carried At Close of Period
Land	13,401	13,401
Building and Land Improvements	9,583	9,583
Total	22,984	22,984
Bethlehem Tech Park-DC18 [Member]
Initial Cost
Land	3,599	3,599
Building and Land Improvements	26,636	26,636
Gross Amounts Carried At Close of Period
Land	3,599	3,599
Building and Land Improvements	26,636	26,636
Total	30,235	30,235
Accumulated Depreciation	(964)	(964)
Bethlehem Tech Park-DC19 [Member]
Initial Cost
Land	3,708	3,708
Building and Land Improvements	16,606	16,606
Gross Amounts Carried At Close of Period
Land	3,708	3,708
Building and Land Improvements	16,606	16,606
Total	20,314	20,314
Accumulated Depreciation	(865)	(865)
Bethlehem Tech Park-DC20 [Member]
Initial Cost
Land	3,599	3,599
Building and Land Improvements	24,062	24,062
Gross Amounts Carried At Close of Period
Land	3,599	3,599
Building and Land Improvements	24,062	24,062
Total	27,661	27,661
Accumulated Depreciation	(965)	(965)
Bethlehem Tech Park - DC 23 [Member]
Initial Cost
Land	0	0
Building and Land Improvements	4,883	4,883
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	4,883	4,883
Total	4,883	4,883
BLC 1 [Member]
Initial Cost
Land	12,034	12,034
Building and Land Improvements	17,917	17,917
Gross Amounts Carried At Close of Period
Land	12,034	12,034
Building and Land Improvements	17,917	17,917
Total	29,951	29,951
Accumulated Depreciation	(245)	(245)
BLC 2 [Member]
Initial Cost
Land	12,034	12,034
Building and Land Improvements	17,659	17,659
Gross Amounts Carried At Close of Period
Land	12,034	12,034
Building and Land Improvements	17,659	17,659
Total	29,693	29,693
Accumulated Depreciation	(210)	(210)
Canton Crossing Land [Member]
Initial Cost
Land	17,285	17,285
Building and Land Improvements	8,179	8,179
Gross Amounts Carried At Close of Period
Land	17,285	17,285
Building and Land Improvements	8,179	8,179
Total	25,464	25,464
Canton Crossing Util Distr Ctr [Member]
Initial Cost
Land	6,100	6,100
Building and Land Improvements	10,450	10,450
Costs Capitalized Subsequent to Acquisition	1,192	1,192
Gross Amounts Carried At Close of Period
Land	6,100	6,100
Building and Land Improvements	11,642	11,642
Total	17,742	17,742
Accumulated Depreciation	(5,053)	(5,053)
Columbia Gateway - Southridge [Member]
Initial Cost
Land	6,387	6,387
Building and Land Improvements	3,722	3,722
Gross Amounts Carried At Close of Period
Land	6,387	6,387
Building and Land Improvements	3,722	3,722
Total	10,109	10,109
Dahlgren Technology Center [Member]
Initial Cost
Land	978	978
Building and Land Improvements	178	178
Gross Amounts Carried At Close of Period
Land	978	978
Building and Land Improvements	178	178
Total	1,156	1,156
Expedition VII [Member]
Initial Cost
Land	705	705
Building and Land Improvements	730	730
Gross Amounts Carried At Close of Period
Land	705	705
Building and Land Improvements	730	730
Total	1,435	1,435
IN 1 [Member]
Initial Cost
Land	1,815	1,815
Building and Land Improvements	11,532	11,532
Gross Amounts Carried At Close of Period
Land	1,815	1,815
Building and Land Improvements	11,532	11,532
Total	13,347	13,347
IN 2 [Member]
Initial Cost
Land	2,627	2,627
Building and Land Improvements	4,655	4,655
Gross Amounts Carried At Close of Period
Land	2,627	2,627
Building and Land Improvements	4,655	4,655
Total	7,282	7,282
M Square Research Park [Member]
Initial Cost
Land	0	0
Building and Land Improvements	3,202	3,202
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	3,202	3,202
Total	3,202	3,202
MP 1 [Member]
Initial Cost
Land	9,426	9,426
Building and Land Improvements	15,865	15,865
Gross Amounts Carried At Close of Period
Land	9,426	9,426
Building and Land Improvements	15,865	15,865
Total	25,291	25,291
MP 2 [Member]
Initial Cost
Land	9,426	9,426
Building and Land Improvements	25,191	25,191
Gross Amounts Carried At Close of Period
Land	9,426	9,426
Building and Land Improvements	25,191	25,191
Total	34,617	34,617
Accumulated Depreciation	0	0
MR Land [Member]
Initial Cost
Land	9,038	9,038
Building and Land Improvements	55	55
Gross Amounts Carried At Close of Period
Land	9,038	9,038
Building and Land Improvements	55	55
Total	9,093	9,093
National Business Park North [Member]
Initial Cost
Land	28,060	28,060
Building and Land Improvements	47,371	47,371
Gross Amounts Carried At Close of Period
Land	28,060	28,060
Building and Land Improvements	47,371	47,371
Total	75,431	75,431
North Gate Business Park [Member]
Initial Cost
Land	1,755	1,755
Building and Land Improvements	0	0
Gross Amounts Carried At Close of Period
Land	1,755	1,755
Building and Land Improvements	0	0
Total	1,755	1,755
Northwest Crossroads [Member]
Initial Cost
Land	7,430	7,430
Building and Land Improvements	847	847
Gross Amounts Carried At Close of Period
Land	7,430	7,430
Building and Land Improvements	847	847
Total	8,277	8,277
NOVA Office A [Member]
Initial Cost
Land	2,096	2,096
Building and Land Improvements	46,840	46,840
Gross Amounts Carried At Close of Period
Land	2,096	2,096
Building and Land Improvements	46,840	46,840
Total	48,936	48,936
Accumulated Depreciation	(4,577)	(4,577)
NOVA Office B [Member]
Initial Cost
Land	739	739
Building and Land Improvements	33,881	33,881
Gross Amounts Carried At Close of Period
Land	739	739
Building and Land Improvements	33,881	33,881
Total	34,620	34,620
Accumulated Depreciation	(1,817)	(1,817)
NOVA Office D [Member]
Initial Cost
Land	6,587	6,587
Building and Land Improvements	40,525	40,525
Gross Amounts Carried At Close of Period
Land	6,587	6,587
Building and Land Improvements	40,525	40,525
Total	47,112	47,112
Accumulated Depreciation	(1,417)	(1,417)
Old Annapolis Road [Member]
Initial Cost
Land	1,637	1,637
Building and Land Improvements	5,500	5,500
Costs Capitalized Subsequent to Acquisition	6,531	6,531
Gross Amounts Carried At Close of Period
Land	1,637	1,637
Building and Land Improvements	12,031	12,031
Total	13,668	13,668
Accumulated Depreciation	(3,898)	(3,898)
Paragon Park - DC 21 [Member]
Initial Cost
Land	7,828	7,828
Building and Land Improvements	19,999	19,999
Gross Amounts Carried At Close of Period
Land	7,828	7,828
Building and Land Improvements	19,999	19,999
Total	27,827	27,827
Accumulated Depreciation	(560)	(560)
Paragon Park - DC 22 [Member]
Initial Cost
Land	7,828	7,828
Building and Land Improvements	18,755	18,755
Gross Amounts Carried At Close of Period
Land	7,828	7,828
Building and Land Improvements	18,755	18,755
Total	26,583	26,583
Accumulated Depreciation	(515)	(515)
Patriot Point - DC15 [Member]
Initial Cost
Land	12,156	12,156
Building and Land Improvements	17,175	17,175
Gross Amounts Carried At Close of Period
Land	12,156	12,156
Building and Land Improvements	17,175	17,175
Total	29,331	29,331
Accumulated Depreciation	(1,180)	(1,180)
Patriot Point - DC16 [Member]
Initial Cost
Land	12,156	12,156
Building and Land Improvements	17,043	17,043
Gross Amounts Carried At Close of Period
Land	12,156	12,156
Building and Land Improvements	17,043	17,043
Total	29,199	29,199
Accumulated Depreciation	(1,135)	(1,135)
Patriot Point - DC17 [Member]
Initial Cost
Land	6,078	6,078
Building and Land Improvements	16,408	16,408
Gross Amounts Carried At Close of Period
Land	6,078	6,078
Building and Land Improvements	16,408	16,408
Total	22,486	22,486
Accumulated Depreciation	(930)	(930)
Patriot Ridge [Member]
Initial Cost
Land	18,517	18,517
Building and Land Improvements	14,505	14,505
Gross Amounts Carried At Close of Period
Land	18,517	18,517
Building and Land Improvements	14,505	14,505
Total	33,022	33,022
Project EX [Member]
Initial Cost
Land	8,958	8,958
Building and Land Improvements	5,744	5,744
Gross Amounts Carried At Close of Period
Land	8,958	8,958
Building and Land Improvements	5,744	5,744
Total	14,702	14,702
Accumulated Depreciation	0	0
Redstone Gateway [Member]
Initial Cost
Land	0	0
Building and Land Improvements	21,807	21,807
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	21,807	21,807
Total	21,807	21,807
Route 15/Biggs Ford Road [Member]
Initial Cost
Land	1,129	1,129
Building and Land Improvements	0	0
Gross Amounts Carried At Close of Period
Land	1,129	1,129
Building and Land Improvements	0	0
Total	1,129	1,129
Sentry Gateway [Member]
Initial Cost
Land	4,052	4,052
Building and Land Improvements	1,833	1,833
Gross Amounts Carried At Close of Period
Land	4,052	4,052
Building and Land Improvements	1,833	1,833
Total	5,885	5,885
Sentry Gateway - T [Member]
Initial Cost
Land	14,020	14,020
Building and Land Improvements	38,804	38,804
Costs Capitalized Subsequent to Acquisition	13	13
Gross Amounts Carried At Close of Period
Land	14,020	14,020
Building and Land Improvements	38,817	38,817
Total	52,837	52,837
Accumulated Depreciation	(11,532)	(11,532)
Sentry Gateway - V [Member]
Initial Cost
Land	0	0
Building and Land Improvements	1,066	1,066
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	1,066	1,066
Total	1,066	1,066
Accumulated Depreciation	(268)	(268)
Sentry Gateway - W [Member]
Initial Cost
Land	0	0
Building and Land Improvements	1,884	1,884
Costs Capitalized Subsequent to Acquisition	71	71
Gross Amounts Carried At Close of Period
Land	0	0
Building and Land Improvements	1,955	1,955
Total	1,955	1,955
Accumulated Depreciation	(444)	(444)
Sentry Gateway - X [Member]
Initial Cost
Land	1,964	1,964
Building and Land Improvements	21,178	21,178
Gross Amounts Carried At Close of Period
Land	1,964	1,964
Building and Land Improvements	21,178	21,178
Total	23,142	23,142
Accumulated Depreciation	(4,316)	(4,316)
Sentry Gateway - Y [Member]
Initial Cost
Land	1,964	1,964
Building and Land Improvements	21,298	21,298
Gross Amounts Carried At Close of Period
Land	1,964	1,964
Building and Land Improvements	21,298	21,298
Total	23,262	23,262
Accumulated Depreciation	(4,342)	(4,342)
Sentry Gateway - Z [Member]
Initial Cost
Land	1,964	1,964
Building and Land Improvements	30,573	30,573
Gross Amounts Carried At Close of Period
Land	1,964	1,964
Building and Land Improvements	30,573	30,573
Total	32,537	32,537
Accumulated Depreciation	(2,908)	(2,908)
Westfields - Park Center [Member]
Initial Cost
Land	16,418	16,418
Building and Land Improvements	12,097	12,097
Gross Amounts Carried At Close of Period
Land	16,418	16,418
Building and Land Improvements	12,097	12,097
Total	28,515	28,515
Westfields Corporate Center [Member]
Initial Cost
Land	7,141	7,141
Building and Land Improvements	1,576	1,576
Gross Amounts Carried At Close of Period
Land	7,141	7,141
Building and Land Improvements	1,576	1,576
Total	8,717	8,717
Other Developments, including intercompany eliminations [Member]
Initial Cost
Land	8	8
Building and Land Improvements	121	121
Costs Capitalized Subsequent to Acquisition	373	373
Gross Amounts Carried At Close of Period
Land	8	8
Building and Land Improvements	494	494
Total	502	502
Accumulated Depreciation	(77)	$ (77)
Fort Meade/BW Corridor [Member]
Additional information
Impairment losses	$ 2,400