Schedule III - Real Estate and Accumulated Depreciation (Details)

v3.3.1.900

Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate and Accumulated Depreciation
Encumbrances	$ 316,887,000
Initial Cost
Land	709,953,000
Building and Land Improvements	3,106,271,000
Costs Capitalized Subsequent to Acquisition	342,392,000
Gross Amounts Carried at Close of Period
Land	709,953,000
Building and Land Improvements	3,448,663,000
Total	4,158,616,000	$ 4,014,336,000	$ 3,811,950,000	$ 3,859,960,000
Accumulated Depreciation	(718,680,000)	(703,083,000)	(597,649,000)	$ (568,176,000)
Additional information
Debt excluded from encumbrances	2,077,752,000	1,914,036,000
Net discounts and deferred financing costs	19,500,000
Aggregate cost of assets for federal income tax purposes	3,500,000,000
Impairment losses	$ 23,289,000	1,416,000	$ 5,857,000
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	$ 43,500,000	83,000,000
Term Loan Facilities [Member]
Additional information
Debt excluded from encumbrances	515,900,000	517,846,000
Unsecured Senior Notes [Member]
Additional information
Debt excluded from encumbrances	1,200,000,000
4.25% Exchangeable Senior Notes [Member]
Additional information
Debt excluded from encumbrances	0	572,000
Unsecured notes payable [Member]
Additional information
Debt excluded from encumbrances	1,500,000	1,607,000
Letter of Credit [Member]
Additional information
Debt excluded from encumbrances	14,800,000
Fixed rate mortgage loans [Member]
Additional information
Debt excluded from encumbrances	281,208,000	385,769,000
Net discounts and deferred financing costs	668,000
100 Light Street [Member]
Real Estate and Accumulated Depreciation
Encumbrances	50,732,000
Initial Cost
Land	26,715,000
Building and Land Improvements	58,343,000
Costs Capitalized Subsequent to Acquisition	55,000
Gross Amounts Carried at Close of Period
Land	26,715,000
Building and Land Improvements	58,398,000
Total	85,113,000
Accumulated Depreciation	(1,588,000)
1000 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	11,370,000
Initial Cost
Building and Land Improvements	20,533,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	20,533,000
Total	20,533,000
Accumulated Depreciation	(1,438,000)
1100 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	11,791,000
Initial Cost
Building and Land Improvements	19,593,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	19,593,000
Total	19,593,000
Accumulated Depreciation	(965,000)
114 National Business Parkway [Member]
Initial Cost
Land	364,000
Building and Land Improvements	3,109,000
Costs Capitalized Subsequent to Acquisition	60,000
Gross Amounts Carried at Close of Period
Land	364,000
Building and Land Improvements	3,169,000
Total	3,533,000
Accumulated Depreciation	(1,125,000)
11751 Meadowville Lane [Member]
Initial Cost
Land	1,305,000
Building and Land Improvements	52,098,000
Costs Capitalized Subsequent to Acquisition	112,000
Gross Amounts Carried at Close of Period
Land	1,305,000
Building and Land Improvements	52,210,000
Total	53,515,000
Accumulated Depreciation	(11,194,000)
1200 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	13,639,000
Initial Cost
Building and Land Improvements	22,389,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	22,389,000
Total	22,389,000
Accumulated Depreciation	(1,145,000)
1201 M Street [Member]
Initial Cost
Building and Land Improvements	49,785,000
Costs Capitalized Subsequent to Acquisition	4,225,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	54,010,000
Total	54,010,000
Accumulated Depreciation	(8,947,000)
1201 Winterson Road [Member]
Initial Cost
Land	1,288,000
Building and Land Improvements	12,175,000
Costs Capitalized Subsequent to Acquisition	460,000
Gross Amounts Carried at Close of Period
Land	1,288,000
Building and Land Improvements	12,635,000
Total	13,923,000
Accumulated Depreciation	(3,824,000)
1220 12th Street, SE [Member]
Initial Cost
Building and Land Improvements	42,464,000
Costs Capitalized Subsequent to Acquisition	2,431,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	44,895,000
Total	44,895,000
Accumulated Depreciation	(8,523,000)
1243 Winterson Road [Member]
Initial Cost
Land	630,000
Gross Amounts Carried at Close of Period
Land	630,000
Total	630,000
1302 Concourse Drive [Member]
Initial Cost
Land	2,078,000
Building and Land Improvements	8,313,000
Costs Capitalized Subsequent to Acquisition	6,559,000
Gross Amounts Carried at Close of Period
Land	2,078,000
Building and Land Improvements	14,872,000
Total	16,950,000
Accumulated Depreciation	(6,188,000)
1304 Concourse Drive [Member]
Initial Cost
Land	1,999,000
Building and Land Improvements	12,934,000
Costs Capitalized Subsequent to Acquisition	2,884,000
Gross Amounts Carried at Close of Period
Land	1,999,000
Building and Land Improvements	15,818,000
Total	17,817,000
Accumulated Depreciation	(6,360,000)
1306 Concourse Drive [Member]
Initial Cost
Land	2,796,000
Building and Land Improvements	11,186,000
Costs Capitalized Subsequent to Acquisition	8,152,000
Gross Amounts Carried at Close of Period
Land	2,796,000
Building and Land Improvements	19,338,000
Total	22,134,000
Accumulated Depreciation	(6,922,000)
131 National Business Parkway [Member]
Initial Cost
Land	1,906,000
Building and Land Improvements	7,623,000
Costs Capitalized Subsequent to Acquisition	3,524,000
Gross Amounts Carried at Close of Period
Land	1,906,000
Building and Land Improvements	11,147,000
Total	13,053,000
Accumulated Depreciation	(5,596,000)
132 National Business Parkway [Member]
Initial Cost
Land	2,917,000
Building and Land Improvements	12,259,000
Costs Capitalized Subsequent to Acquisition	3,005,000
Gross Amounts Carried at Close of Period
Land	2,917,000
Building and Land Improvements	15,264,000
Total	18,181,000
Accumulated Depreciation	(7,700,000)
133 National Business Parkway [Member]
Initial Cost
Land	2,517,000
Building and Land Improvements	10,068,000
Costs Capitalized Subsequent to Acquisition	5,204,000
Gross Amounts Carried at Close of Period
Land	2,517,000
Building and Land Improvements	15,272,000
Total	17,789,000
Accumulated Depreciation	(8,230,000)
1331 Ashton Road [Member]
Initial Cost
Land	587,000
Building and Land Improvements	2,347,000
Costs Capitalized Subsequent to Acquisition	1,575,000
Gross Amounts Carried at Close of Period
Land	587,000
Building and Land Improvements	3,922,000
Total	4,509,000
Accumulated Depreciation	(1,337,000)
1334 Ashton Road [Member]
Initial Cost
Land	736,000
Building and Land Improvements	1,488,000
Costs Capitalized Subsequent to Acquisition	2,639,000
Gross Amounts Carried at Close of Period
Land	736,000
Building and Land Improvements	4,127,000
Total	4,863,000
Accumulated Depreciation	(2,467,000)
134 National Business Parkway [Member]
Initial Cost
Land	3,684,000
Building and Land Improvements	7,517,000
Costs Capitalized Subsequent to Acquisition	3,496,000
Gross Amounts Carried at Close of Period
Land	3,684,000
Building and Land Improvements	11,013,000
Total	14,697,000
Accumulated Depreciation	(4,062,000)
1340 Ashton Road [Member]
Initial Cost
Land	905,000
Building and Land Improvements	3,620,000
Costs Capitalized Subsequent to Acquisition	1,469,000
Gross Amounts Carried at Close of Period
Land	905,000
Building and Land Improvements	5,089,000
Total	5,994,000
Accumulated Depreciation	(2,621,000)
1341 Ashton Road [Member]
Initial Cost
Land	306,000
Building and Land Improvements	1,223,000
Costs Capitalized Subsequent to Acquisition	604,000
Gross Amounts Carried at Close of Period
Land	306,000
Building and Land Improvements	1,827,000
Total	2,133,000
Accumulated Depreciation	(932,000)
1343 Ashton Road [Member]
Initial Cost
Land	193,000
Building and Land Improvements	774,000
Costs Capitalized Subsequent to Acquisition	405,000
Gross Amounts Carried at Close of Period
Land	193,000
Building and Land Improvements	1,179,000
Total	1,372,000
Accumulated Depreciation	(640,000)
13450 Sunrise Valley Road [Member]
Initial Cost
Land	1,386,000
Building and Land Improvements	5,576,000
Costs Capitalized Subsequent to Acquisition	3,335,000
Gross Amounts Carried at Close of Period
Land	1,386,000
Building and Land Improvements	8,911,000
Total	10,297,000
Accumulated Depreciation	(3,902,000)
13454 Sunrise Valley Road [Member]
Initial Cost
Land	2,899,000
Building and Land Improvements	11,986,000
Costs Capitalized Subsequent to Acquisition	6,750,000
Gross Amounts Carried at Close of Period
Land	2,899,000
Building and Land Improvements	18,736,000
Total	21,635,000
Accumulated Depreciation	(7,177,000)
135 National Business Parkway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	11,125,000
Initial Cost
Land	2,484,000
Building and Land Improvements	9,750,000
Costs Capitalized Subsequent to Acquisition	5,700,000
Gross Amounts Carried at Close of Period
Land	2,484,000
Building and Land Improvements	15,450,000
Total	17,934,000
Accumulated Depreciation	(6,467,000)
1362 Mellon Road [Member]
Initial Cost
Land	1,706,000
Building and Land Improvements	8,670,000
Costs Capitalized Subsequent to Acquisition	182,000
Gross Amounts Carried at Close of Period
Land	1,706,000
Building and Land Improvements	8,852,000
Total	10,558,000
Accumulated Depreciation	(1,517,000)
13857 McLearen Road [Member]
Initial Cost
Land	3,507,000
Building and Land Improvements	30,177,000
Costs Capitalized Subsequent to Acquisition	1,565,000
Gross Amounts Carried at Close of Period
Land	3,507,000
Building and Land Improvements	31,742,000
Total	35,249,000
Accumulated Depreciation	(6,961,000)
140 National Business Parkway [Member]
Initial Cost
Land	3,407,000
Building and Land Improvements	24,167,000
Costs Capitalized Subsequent to Acquisition	688,000
Gross Amounts Carried at Close of Period
Land	3,407,000
Building and Land Improvements	24,855,000
Total	28,262,000
Accumulated Depreciation	(7,647,000)
141 National Business Parkway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	11,566,000
Initial Cost
Land	2,398,000
Building and Land Improvements	9,590,000
Costs Capitalized Subsequent to Acquisition	3,194,000
Gross Amounts Carried at Close of Period
Land	2,398,000
Building and Land Improvements	12,784,000
Total	15,182,000
Accumulated Depreciation	(5,963,000)
14280 Park Meadow Drive [Member]
Initial Cost
Land	3,731,000
Building and Land Improvements	15,953,000
Costs Capitalized Subsequent to Acquisition	1,764,000
Gross Amounts Carried at Close of Period
Land	3,731,000
Building and Land Improvements	17,717,000
Total	21,448,000
Accumulated Depreciation	(6,185,000)
1460 Dorsey Road [Member]
Initial Cost
Land	1,800,000
Gross Amounts Carried at Close of Period
Land	1,800,000
Total	1,800,000
14840 Conference Center Drive [Member]
Initial Cost
Land	1,572,000
Building and Land Improvements	8,175,000
Costs Capitalized Subsequent to Acquisition	2,860,000
Gross Amounts Carried at Close of Period
Land	1,572,000
Building and Land Improvements	11,035,000
Total	12,607,000
Accumulated Depreciation	(4,320,000)
14850 Conference Center Drive [Member]
Initial Cost
Land	1,615,000
Building and Land Improvements	8,358,000
Costs Capitalized Subsequent to Acquisition	2,947,000
Gross Amounts Carried at Close of Period
Land	1,615,000
Building and Land Improvements	11,305,000
Total	12,920,000
Accumulated Depreciation	(4,646,000)
14900 Conference Center Drive [Member]
Initial Cost
Land	3,436,000
Building and Land Improvements	14,402,000
Costs Capitalized Subsequent to Acquisition	5,239,000
Gross Amounts Carried at Close of Period
Land	3,436,000
Building and Land Improvements	19,641,000
Total	23,077,000
Accumulated Depreciation	(8,221,000)
1501 South Clinton Street [Member]
Initial Cost
Land	27,964,000
Building and Land Improvements	52,146,000
Costs Capitalized Subsequent to Acquisition	8,165,000
Gross Amounts Carried at Close of Period
Land	27,964,000
Building and Land Improvements	60,311,000
Total	88,275,000
Accumulated Depreciation	(14,472,000)
15049 Conference Center Drive [Member]
Initial Cost
Land	4,415,000
Building and Land Improvements	20,365,000
Costs Capitalized Subsequent to Acquisition	3,619,000
Gross Amounts Carried at Close of Period
Land	4,415,000
Building and Land Improvements	23,984,000
Total	28,399,000
Accumulated Depreciation	(9,236,000)
15059 Conference Center Drive [Member]
Initial Cost
Land	5,753,000
Building and Land Improvements	13,615,000
Costs Capitalized Subsequent to Acquisition	2,065,000
Gross Amounts Carried at Close of Period
Land	5,753,000
Building and Land Improvements	15,680,000
Total	21,433,000
Accumulated Depreciation	(6,697,000)
15395 John Marshall Highway [Member]
Initial Cost
Land	2,465,000
Building and Land Improvements	24,768,000
Gross Amounts Carried at Close of Period
Land	2,465,000
Building and Land Improvements	24,768,000
Total	27,233,000
Accumulated Depreciation	(1,195,000)
1550 West Nursery Road [Member]
Initial Cost
Land	14,071,000
Building and Land Improvements	16,930,000
Gross Amounts Carried at Close of Period
Land	14,071,000
Building and Land Improvements	16,930,000
Total	31,001,000
Accumulated Depreciation	(3,626,000)
1560 West Nursery Road [Member]
Initial Cost
Land	1,441,000
Building and Land Improvements	113,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	1,441,000
Building and Land Improvements	113,000
Total	1,554,000
Accumulated Depreciation	(5,000)
1560A Cable Ranch Road [Member]
Initial Cost
Land	1,097,000
Building and Land Improvements	3,770,000
Costs Capitalized Subsequent to Acquisition	394,000
Gross Amounts Carried at Close of Period
Land	1,097,000
Building and Land Improvements	4,164,000
Total	5,261,000
Accumulated Depreciation	(1,298,000)
1560B Cable Ranch Road [Member]
Initial Cost
Land	2,299,000
Building and Land Improvements	6,545,000
Costs Capitalized Subsequent to Acquisition	159,000
Gross Amounts Carried at Close of Period
Land	2,299,000
Building and Land Improvements	6,704,000
Total	9,003,000
Accumulated Depreciation	(1,738,000)
16442 Commerce Drive [Member]
Initial Cost
Land	613,000
Building and Land Improvements	2,582,000
Costs Capitalized Subsequent to Acquisition	883,000
Gross Amounts Carried at Close of Period
Land	613,000
Building and Land Improvements	3,465,000
Total	4,078,000
Accumulated Depreciation	(1,332,000)
16480 Commerce Drive [Member]
Initial Cost
Land	1,856,000
Building and Land Improvements	7,425,000
Costs Capitalized Subsequent to Acquisition	1,283,000
Gross Amounts Carried at Close of Period
Land	1,856,000
Building and Land Improvements	8,708,000
Total	10,564,000
Accumulated Depreciation	(2,316,000)
16501 Commerce Drive [Member]
Initial Cost
Land	522,000
Building and Land Improvements	2,090,000
Costs Capitalized Subsequent to Acquisition	482,000
Gross Amounts Carried at Close of Period
Land	522,000
Building and Land Improvements	2,572,000
Total	3,094,000
Accumulated Depreciation	(797,000)
16539 Commerce Drive [Member]
Initial Cost
Land	688,000
Building and Land Improvements	2,860,000
Costs Capitalized Subsequent to Acquisition	1,524,000
Gross Amounts Carried at Close of Period
Land	688,000
Building and Land Improvements	4,384,000
Total	5,072,000
Accumulated Depreciation	(1,934,000)
16541 Commerce Drive [Member]
Initial Cost
Land	773,000
Building and Land Improvements	3,094,000
Costs Capitalized Subsequent to Acquisition	1,368,000
Gross Amounts Carried at Close of Period
Land	773,000
Building and Land Improvements	4,462,000
Total	5,235,000
Accumulated Depreciation	(1,727,000)
16543 Commerce Drive [Member]
Initial Cost
Land	436,000
Building and Land Improvements	1,742,000
Costs Capitalized Subsequent to Acquisition	502,000
Gross Amounts Carried at Close of Period
Land	436,000
Building and Land Improvements	2,244,000
Total	2,680,000
Accumulated Depreciation	(573,000)
1751 Pinnacle Drive [Member]
Initial Cost
Land	10,486,000
Building and Land Improvements	42,339,000
Costs Capitalized Subsequent to Acquisition	24,059,000
Gross Amounts Carried at Close of Period
Land	10,486,000
Building and Land Improvements	66,398,000
Total	76,884,000
Accumulated Depreciation	(23,750,000)
1753 Pinnacle Drive [Member]
Initial Cost
Land	8,275,000
Building and Land Improvements	34,353,000
Costs Capitalized Subsequent to Acquisition	10,894,000
Gross Amounts Carried at Close of Period
Land	8,275,000
Building and Land Improvements	45,247,000
Total	53,522,000
Accumulated Depreciation	(15,849,000)
201 Technology Drive [Member]
Initial Cost
Land	726,000
Building and Land Improvements	31,091,000
Costs Capitalized Subsequent to Acquisition	59,000
Gross Amounts Carried at Close of Period
Land	726,000
Building and Land Improvements	31,150,000
Total	31,876,000
Accumulated Depreciation	(6,358,000)
206 Research Boulevard [Member]
Initial Cost
Land	1,813,000
Building and Land Improvements	17,485,000
Gross Amounts Carried at Close of Period
Land	1,813,000
Building and Land Improvements	17,485,000
Total	19,298,000
Accumulated Depreciation	(1,416,000)
209 Research Boulevard [Member]
Initial Cost
Land	1,045,000
Building and Land Improvements	16,087,000
Costs Capitalized Subsequent to Acquisition	79,000
Gross Amounts Carried at Close of Period
Land	1,045,000
Building and Land Improvements	16,166,000
Total	17,211,000
Accumulated Depreciation	(2,069,000)
210 Research Boulevard [Member]
Initial Cost
Land	1,065,000
Building and Land Improvements	15,102,000
Costs Capitalized Subsequent to Acquisition	75,000
Gross Amounts Carried at Close of Period
Land	1,065,000
Building and Land Improvements	15,177,000
Total	16,242,000
Accumulated Depreciation	(1,569,000)
2100 Rideout Road [Member]
Initial Cost
Land	0
Building and Land Improvements	2,586,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	0
Building and Land Improvements	2,586,000
Total	2,586,000
2100 L Street [Member]
Initial Cost
Land	1,273,000
Building and Land Improvements	1,685,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	1,273,000
Building and Land Improvements	1,685,000
Total	2,958,000
21267 Smith Switch Road [Member]
Initial Cost
Land	4,040,000
Building and Land Improvements	10,135,000
Gross Amounts Carried at Close of Period
Land	4,040,000
Building and Land Improvements	10,135,000
Total	14,175,000
Accumulated Depreciation	(365,000)
21271 Smith Switch Road [Member]
Initial Cost
Land	7,346,000
Building and Land Improvements	18,267,000
Gross Amounts Carried at Close of Period
Land	7,346,000
Building and Land Improvements	18,267,000
Total	25,613,000
Accumulated Depreciation	(881,000)
22289 Exploration Drive [Member]
Initial Cost
Land	1,422,000
Building and Land Improvements	5,719,000
Costs Capitalized Subsequent to Acquisition	1,660,000
Gross Amounts Carried at Close of Period
Land	1,422,000
Building and Land Improvements	7,379,000
Total	8,801,000
Accumulated Depreciation	(2,826,000)
22299 Exploration Drive [Member]
Initial Cost
Land	1,362,000
Building and Land Improvements	5,791,000
Costs Capitalized Subsequent to Acquisition	1,218,000
Gross Amounts Carried at Close of Period
Land	1,362,000
Building and Land Improvements	7,009,000
Total	8,371,000
Accumulated Depreciation	(2,641,000)
22300 Exploration Drive [Member]
Initial Cost
Land	1,094,000
Building and Land Improvements	5,038,000
Costs Capitalized Subsequent to Acquisition	1,315,000
Gross Amounts Carried at Close of Period
Land	1,094,000
Building and Land Improvements	6,353,000
Total	7,447,000
Accumulated Depreciation	(2,024,000)
22309 Exploration Drive [Member]
Initial Cost
Land	2,243,000
Building and Land Improvements	10,419,000
Costs Capitalized Subsequent to Acquisition	7,787,000
Gross Amounts Carried at Close of Period
Land	2,243,000
Building and Land Improvements	18,206,000
Total	20,449,000
Accumulated Depreciation	(4,683,000)
23535 Cottonwood Parkway [Member]
Initial Cost
Land	692,000
Building and Land Improvements	3,051,000
Costs Capitalized Subsequent to Acquisition	248,000
Gross Amounts Carried at Close of Period
Land	692,000
Building and Land Improvements	3,299,000
Total	3,991,000
Accumulated Depreciation	(1,206,000)
250 W Pratt St [Member]
Initial Cost
Land	8,057,000
Building and Land Improvements	34,654,000
Costs Capitalized Subsequent to Acquisition	4,765,000
Gross Amounts Carried at Close of Period
Land	8,057,000
Building and Land Improvements	39,419,000
Total	47,476,000
Accumulated Depreciation	(1,652,000)
2500 Riva Road [Member]
Initial Cost
Land	2,791,000
Building and Land Improvements	12,145,000
Costs Capitalized Subsequent to Acquisition	1,000
Gross Amounts Carried at Close of Period
Land	2,791,000
Building and Land Improvements	12,146,000
Total	14,937,000
Accumulated Depreciation	(4,417,000)
2600 Park Tower Drive [Member]
Initial Cost
Land	20,304,000
Building and Land Improvements	34,443,000
Costs Capitalized Subsequent to Acquisition	346,000
Gross Amounts Carried at Close of Period
Land	20,304,000
Building and Land Improvements	34,789,000
Total	55,093,000
Accumulated Depreciation	(1,051,000)
2691 Technology Drive [Member]
Initial Cost
Land	2,098,000
Building and Land Improvements	17,334,000
Costs Capitalized Subsequent to Acquisition	5,305,000
Gross Amounts Carried at Close of Period
Land	2,098,000
Building and Land Improvements	22,639,000
Total	24,737,000
Accumulated Depreciation	(7,827,000)
2701 Technology Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	22,053,000
Initial Cost
Land	1,737,000
Building and Land Improvements	15,266,000
Costs Capitalized Subsequent to Acquisition	2,821,000
Gross Amounts Carried at Close of Period
Land	1,737,000
Building and Land Improvements	18,087,000
Total	19,824,000
Accumulated Depreciation	(7,567,000)
2711 Technology Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	17,153,000
Initial Cost
Land	2,251,000
Building and Land Improvements	21,611,000
Costs Capitalized Subsequent to Acquisition	1,468,000
Gross Amounts Carried at Close of Period
Land	2,251,000
Building and Land Improvements	23,079,000
Total	25,330,000
Accumulated Depreciation	(10,158,000)
2720 Technology Drive [Member]
Initial Cost
Land	3,863,000
Building and Land Improvements	29,272,000
Costs Capitalized Subsequent to Acquisition	146,000
Gross Amounts Carried at Close of Period
Land	3,863,000
Building and Land Improvements	29,418,000
Total	33,281,000
Accumulated Depreciation	(8,316,000)
2721 Technology Drive [Member]
Initial Cost
Land	4,611,000
Building and Land Improvements	14,597,000
Costs Capitalized Subsequent to Acquisition	1,263,000
Gross Amounts Carried at Close of Period
Land	4,611,000
Building and Land Improvements	15,860,000
Total	20,471,000
Accumulated Depreciation	(6,400,000)
2730 Hercules Road [Member]
Real Estate and Accumulated Depreciation
Encumbrances	34,256,000
Initial Cost
Land	8,737,000
Building and Land Improvements	31,612,000
Costs Capitalized Subsequent to Acquisition	7,213,000
Gross Amounts Carried at Close of Period
Land	8,737,000
Building and Land Improvements	38,825,000
Total	47,562,000
Accumulated Depreciation	(15,674,000)
2900 Towerview Road [Member]
Initial Cost
Land	3,207,000
Building and Land Improvements	16,379,000
Costs Capitalized Subsequent to Acquisition	6,509,000
Gross Amounts Carried at Close of Period
Land	3,207,000
Building and Land Improvements	22,888,000
Total	26,095,000
Accumulated Depreciation	(7,181,000)
30 Light Street [Member]
Real Estate and Accumulated Depreciation
Encumbrances	4,268,000
Initial Cost
Land	0
Building and Land Improvements	12,101,000
Costs Capitalized Subsequent to Acquisition	37,000
Gross Amounts Carried at Close of Period
Land	0
Building and Land Improvements	12,138,000
Total	12,138,000
Accumulated Depreciation	(128,000)
300 Sentinel Drive [Member]
Initial Cost
Land	1,517,000
Building and Land Improvements	59,016,000
Costs Capitalized Subsequent to Acquisition	219,000
Gross Amounts Carried at Close of Period
Land	1,517,000
Building and Land Improvements	59,235,000
Total	60,752,000
Accumulated Depreciation	(8,458,000)
302 Sentinel Drive [Member]
Initial Cost
Land	2,648,000
Building and Land Improvements	29,687,000
Costs Capitalized Subsequent to Acquisition	445,000
Gross Amounts Carried at Close of Period
Land	2,648,000
Building and Land Improvements	30,132,000
Total	32,780,000
Accumulated Depreciation	(6,000,000)
304 Sentinel Drive [Member]
Initial Cost
Land	3,411,000
Building and Land Improvements	24,917,000
Costs Capitalized Subsequent to Acquisition	193,000
Gross Amounts Carried at Close of Period
Land	3,411,000
Building and Land Improvements	25,110,000
Total	28,521,000
Accumulated Depreciation	(6,304,000)
306 Sentinel Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	15,878,000
Initial Cost
Land	3,260,000
Building and Land Improvements	22,592,000
Costs Capitalized Subsequent to Acquisition	611,000
Gross Amounts Carried at Close of Period
Land	3,260,000
Building and Land Improvements	23,203,000
Total	26,463,000
Accumulated Depreciation	(5,269,000)
308 Sentinel Drive [Member]
Initial Cost
Land	1,422,000
Building and Land Improvements	26,208,000
Costs Capitalized Subsequent to Acquisition	37,000
Gross Amounts Carried at Close of Period
Land	1,422,000
Building and Land Improvements	26,245,000
Total	27,667,000
Accumulated Depreciation	(3,050,000)
310 Sentinel Way [Member]
Initial Cost
Land	2,372,000
Building and Land Improvements	36,468,000
Gross Amounts Carried at Close of Period
Land	2,372,000
Building and Land Improvements	36,468,000
Total	38,840,000
Accumulated Depreciation	(191,000)
310 The Bridge Street [Member]
Initial Cost
Land	261,000
Building and Land Improvements	26,531,000
Costs Capitalized Subsequent to Acquisition	1,695,000
Gross Amounts Carried at Close of Period
Land	261,000
Building and Land Improvements	28,226,000
Total	28,487,000
Accumulated Depreciation	(5,136,000)
312 Sentinel Way [Member]
Initial Cost
Land	3,138,000
Building and Land Improvements	27,789,000
Gross Amounts Carried at Close of Period
Land	3,138,000
Building and Land Improvements	27,789,000
Total	30,927,000
Accumulated Depreciation	(913,000)
3120 Fairview Park Drive [Member]
Initial Cost
Land	6,863,000
Building and Land Improvements	35,606,000
Costs Capitalized Subsequent to Acquisition	8,773,000
Gross Amounts Carried at Close of Period
Land	6,863,000
Building and Land Improvements	44,379,000
Total	51,242,000
Accumulated Depreciation	(7,229,000)
314 Sentinel Way [Member]
Initial Cost
Land	1,254,000
Building and Land Improvements	1,439,000
Gross Amounts Carried at Close of Period
Land	1,254,000
Building and Land Improvements	1,439,000
Total	2,693,000
Accumulated Depreciation	(249,000)
316 Sentinel Way [Member]
Initial Cost
Land	2,748,000
Building and Land Improvements	38,156,000
Costs Capitalized Subsequent to Acquisition	138,000
Gross Amounts Carried at Close of Period
Land	2,748,000
Building and Land Improvements	38,294,000
Total	41,042,000
Accumulated Depreciation	(3,570,000)
318 Sentinel Way [Member]
Initial Cost
Land	2,185,000
Building and Land Improvements	28,426,000
Gross Amounts Carried at Close of Period
Land	2,185,000
Building and Land Improvements	28,426,000
Total	30,611,000
Accumulated Depreciation	(6,981,000)
320 Sentinel Way [Member]
Initial Cost
Land	2,067,000
Building and Land Improvements	21,623,000
Gross Amounts Carried at Close of Period
Land	2,067,000
Building and Land Improvements	21,623,000
Total	23,690,000
Accumulated Depreciation	(4,310,000)
322 Sentinel Way [Member]
Real Estate and Accumulated Depreciation
Encumbrances	21,122,000
Initial Cost
Land	2,605,000
Building and Land Improvements	22,827,000
Gross Amounts Carried at Close of Period
Land	2,605,000
Building and Land Improvements	22,827,000
Total	25,432,000
Accumulated Depreciation	(5,143,000)
324 Sentinel Way [Member]
Initial Cost
Land	1,656,000
Building and Land Improvements	23,018,000
Gross Amounts Carried at Close of Period
Land	1,656,000
Building and Land Improvements	23,018,000
Total	24,674,000
Accumulated Depreciation	(3,078,000)
410 National Business Parkway [Member]
Initial Cost
Land	1,831,000
Building and Land Improvements	23,257,000
Costs Capitalized Subsequent to Acquisition	112,000
Gross Amounts Carried at Close of Period
Land	1,831,000
Building and Land Improvements	23,369,000
Total	25,200,000
Accumulated Depreciation	(1,719,000)
420 National Business Parkway [Member]
Initial Cost
Land	2,370,000
Building and Land Improvements	27,490,000
Costs Capitalized Subsequent to Acquisition	106,000
Gross Amounts Carried at Close of Period
Land	2,370,000
Building and Land Improvements	27,596,000
Total	29,966,000
Accumulated Depreciation	(1,230,000)
430 National Business Parkway [Member]
Initial Cost
Land	1,852,000
Building and Land Improvements	21,153,000
Costs Capitalized Subsequent to Acquisition	119,000
Gross Amounts Carried at Close of Period
Land	1,852,000
Building and Land Improvements	21,272,000
Total	23,124,000
Accumulated Depreciation	(2,034,000)
44408 Pecan Court [Member]
Initial Cost
Land	817,000
Building and Land Improvements	1,583,000
Costs Capitalized Subsequent to Acquisition	581,000
Gross Amounts Carried at Close of Period
Land	817,000
Building and Land Improvements	2,164,000
Total	2,981,000
Accumulated Depreciation	(560,000)
44414 Pecan Court [Member]
Initial Cost
Land	405,000
Building and Land Improvements	1,619,000
Costs Capitalized Subsequent to Acquisition	337,000
Gross Amounts Carried at Close of Period
Land	405,000
Building and Land Improvements	1,956,000
Total	2,361,000
Accumulated Depreciation	(725,000)
44417 Pecan Court [Member]
Initial Cost
Land	434,000
Building and Land Improvements	3,348,000
Costs Capitalized Subsequent to Acquisition	88,000
Gross Amounts Carried at Close of Period
Land	434,000
Building and Land Improvements	3,436,000
Total	3,870,000
Accumulated Depreciation	(1,127,000)
44420 Pecan Court [Member]
Initial Cost
Land	344,000
Building and Land Improvements	890,000
Costs Capitalized Subsequent to Acquisition	148,000
Gross Amounts Carried at Close of Period
Land	344,000
Building and Land Improvements	1,038,000
Total	1,382,000
Accumulated Depreciation	(255,000)
44425 Pecan Court [Member]
Initial Cost
Land	1,309,000
Building and Land Improvements	3,506,000
Costs Capitalized Subsequent to Acquisition	1,590,000
Gross Amounts Carried at Close of Period
Land	1,309,000
Building and Land Improvements	5,096,000
Total	6,405,000
Accumulated Depreciation	(1,784,000)
45310 Abell House Lane [Member]
Initial Cost
Land	2,272,000
Building and Land Improvements	13,808,000
Gross Amounts Carried at Close of Period
Land	2,272,000
Building and Land Improvements	13,808,000
Total	16,080,000
Accumulated Depreciation	(1,403,000)
46579 Expedition Drive [Member]
Initial Cost
Land	1,406,000
Building and Land Improvements	5,796,000
Costs Capitalized Subsequent to Acquisition	1,335,000
Gross Amounts Carried at Close of Period
Land	1,406,000
Building and Land Improvements	7,131,000
Total	8,537,000
Accumulated Depreciation	(3,060,000)
46591 Expedition Drive [Member]
Initial Cost
Land	1,200,000
Building and Land Improvements	7,199,000
Costs Capitalized Subsequent to Acquisition	1,134,000
Gross Amounts Carried at Close of Period
Land	1,200,000
Building and Land Improvements	8,333,000
Total	9,533,000
Accumulated Depreciation	(1,933,000)
4851 Stonecroft Boulevard [Member]
Initial Cost
Land	1,878,000
Building and Land Improvements	11,558,000
Costs Capitalized Subsequent to Acquisition	21,000
Gross Amounts Carried at Close of Period
Land	1,878,000
Building and Land Improvements	11,579,000
Total	13,457,000
Accumulated Depreciation	(3,248,000)
4940 Campbell Drive [Member]
Initial Cost
Land	1,379,000
Building and Land Improvements	2,728,000
Costs Capitalized Subsequent to Acquisition	1,464,000
Gross Amounts Carried at Close of Period
Land	1,379,000
Building and Land Improvements	4,192,000
Total	5,571,000
Accumulated Depreciation	(445,000)
525 Babcock Road [Member]
Initial Cost
Land	355,000
Building and Land Improvements	397,000
Costs Capitalized Subsequent to Acquisition	79,000
Gross Amounts Carried at Close of Period
Land	355,000
Building and Land Improvements	476,000
Total	831,000
Accumulated Depreciation	(173,000)
5325 Nottingham Drive [Member]
Initial Cost
Land	816,000
Building and Land Improvements	3,976,000
Costs Capitalized Subsequent to Acquisition	485,000
Gross Amounts Carried at Close of Period
Land	816,000
Building and Land Improvements	4,461,000
Total	5,277,000
Accumulated Depreciation	(1,233,000)
5355 Nottingham Drive [Member]
Initial Cost
Land	761,000
Building and Land Improvements	3,562,000
Costs Capitalized Subsequent to Acquisition	1,758,000
Gross Amounts Carried at Close of Period
Land	761,000
Building and Land Improvements	5,320,000
Total	6,081,000
Accumulated Depreciation	(2,132,000)
540 National Business Parkway [Member]
Initial Cost
Land	2,035,000
Building and Land Improvements	9,496,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	2,035,000
Building and Land Improvements	9,496,000
Total	11,531,000
Accumulated Depreciation	0
5520 Research Park Drive [Member]
Initial Cost
Building and Land Improvements	20,072,000
Costs Capitalized Subsequent to Acquisition	201,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	20,273,000
Total	20,273,000
Accumulated Depreciation	(3,195,000)
5522 Research Park Drive [Member]
Initial Cost
Building and Land Improvements	4,550,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	4,550,000
Total	4,550,000
Accumulated Depreciation	(955,000)
5825 University Research Court [Member]
Real Estate and Accumulated Depreciation
Encumbrances	15,255,000
Initial Cost
Building and Land Improvements	22,740,000
Costs Capitalized Subsequent to Acquisition	87,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	22,827,000
Total	22,827,000
Accumulated Depreciation	(3,817,000)
5850 University Research Court [Member]
Real Estate and Accumulated Depreciation
Encumbrances	20,771,000
Initial Cost
Building and Land Improvements	31,906,000
Costs Capitalized Subsequent to Acquisition	406,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	32,312,000
Total	32,312,000
Accumulated Depreciation	(4,580,000)
6700 Alexander Bell Drive [Member]
Initial Cost
Land	1,755,000
Building and Land Improvements	7,019,000
Costs Capitalized Subsequent to Acquisition	6,226,000
Gross Amounts Carried at Close of Period
Land	1,755,000
Building and Land Improvements	13,245,000
Total	15,000,000
Accumulated Depreciation	(5,913,000)
6708 Alexander Bell Drive [Member]
Initial Cost
Land	897,000
Building and Land Improvements	8,844,000
Costs Capitalized Subsequent to Acquisition	1,591,000
Gross Amounts Carried at Close of Period
Land	897,000
Building and Land Improvements	10,435,000
Total	11,332,000
Accumulated Depreciation		(3,414,000)
6711 Columbia Gateway Drive [Member]
Initial Cost
Land	2,683,000
Building and Land Improvements	23,239,000
Costs Capitalized Subsequent to Acquisition	619,000
Gross Amounts Carried at Close of Period
Land	2,683,000
Building and Land Improvements	23,858,000
Total	26,541,000
Accumulated Depreciation		(5,407,000)
6716 Alexander Bell Drive [Member]
Initial Cost
Land	1,242,000
Building and Land Improvements	4,969,000
Costs Capitalized Subsequent to Acquisition	3,352,000
Gross Amounts Carried at Close of Period
Land	1,242,000
Building and Land Improvements	8,321,000
Total	9,563,000
Accumulated Depreciation		(4,359,000)
6721 Columbia Gateway Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	16,663,000
Initial Cost
Land	1,753,000
Building and Land Improvements	34,090,000
Costs Capitalized Subsequent to Acquisition	76,000
Gross Amounts Carried at Close of Period
Land	1,753,000
Building and Land Improvements	34,166,000
Total	35,919,000
Accumulated Depreciation		(5,798,000)
6724 Alexander Bell Drive [Member]
Initial Cost
Land	449,000
Building and Land Improvements	5,039,000
Costs Capitalized Subsequent to Acquisition	708,000
Gross Amounts Carried at Close of Period
Land	449,000
Building and Land Improvements	5,747,000
Total	6,196,000
Accumulated Depreciation		(2,266,000)
6731 Columbia Gateway Drive [Member]
Initial Cost
Land	2,807,000
Building and Land Improvements	19,098,000
Costs Capitalized Subsequent to Acquisition	2,916,000
Gross Amounts Carried at Close of Period
Land	2,807,000
Building and Land Improvements	22,014,000
Total	24,821,000
Accumulated Depreciation		(8,494,000)
6740 Alexander Bell Drive [Member]
Initial Cost
Land	1,424,000
Building and Land Improvements	5,696,000
Costs Capitalized Subsequent to Acquisition	3,340,000
Gross Amounts Carried at Close of Period
Land	1,424,000
Building and Land Improvements	9,036,000
Total	10,460,000
Accumulated Depreciation		(5,058,000)
6741 Columbia Gateway Drive [Member]
Initial Cost
Land	675,000
Building and Land Improvements	1,711,000
Costs Capitalized Subsequent to Acquisition	124,000
Gross Amounts Carried at Close of Period
Land	675,000
Building and Land Improvements	1,835,000
Total	2,510,000
Accumulated Depreciation		(357,000)
6750 Alexander Bell Drive [Member]
Initial Cost
Land	1,263,000
Building and Land Improvements	12,461,000
Costs Capitalized Subsequent to Acquisition	3,457,000
Gross Amounts Carried at Close of Period
Land	1,263,000
Building and Land Improvements	15,918,000
Total	17,181,000
Accumulated Depreciation		(7,576,000)
6760 Alexander Bell Drive [Member]
Initial Cost
Land	890,000
Building and Land Improvements	3,561,000
Costs Capitalized Subsequent to Acquisition	2,974,000
Gross Amounts Carried at Close of Period
Land	890,000
Building and Land Improvements	6,535,000
Total	7,425,000
Accumulated Depreciation		(3,248,000)
6940 Columbia Gateway Drive [Member]
Initial Cost
Land	3,545,000
Building and Land Improvements	9,916,000
Costs Capitalized Subsequent to Acquisition	5,537,000
Gross Amounts Carried at Close of Period
Land	3,545,000
Building and Land Improvements	15,453,000
Total	18,998,000
Accumulated Depreciation		(7,000,000)
6950 Columbia Gateway Drive [Member]
Initial Cost
Land	3,596,000
Building and Land Improvements	14,269,000
Costs Capitalized Subsequent to Acquisition	3,087,000
Gross Amounts Carried at Close of Period
Land	3,596,000
Building and Land Improvements	17,356,000
Total	20,952,000
Accumulated Depreciation		(7,506,000)
7000 Columbia Gateway Drive [Member]
Initial Cost
Land	3,131,000
Building and Land Improvements	12,103,000
Costs Capitalized Subsequent to Acquisition	2,138,000
Gross Amounts Carried at Close of Period
Land	3,131,000
Building and Land Improvements	14,241,000
Total	17,372,000
Accumulated Depreciation		(4,482,000)
7005 Columbia Gateway Drive [Member]
Initial Cost
Land	3,036,000
Building and Land Improvements	189,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	3,036,000
Building and Land Improvements	189,000
Total	3,225,000
Accumulated Depreciation		0
7015 Albert Einstein Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	1,570,000
Initial Cost
Land	2,058,000
Building and Land Improvements	6,093,000
Costs Capitalized Subsequent to Acquisition	1,527,000
Gross Amounts Carried at Close of Period
Land	2,058,000
Building and Land Improvements	7,620,000
Total	9,678,000
Accumulated Depreciation		(2,915,000)
7061 Columbia Gateway Drive [Member]
Initial Cost
Land	729,000
Building and Land Improvements	3,094,000
Costs Capitalized Subsequent to Acquisition	1,407,000
Gross Amounts Carried at Close of Period
Land	729,000
Building and Land Improvements	4,501,000
Total	5,230,000
Accumulated Depreciation		(1,802,000)
7063 Columbia Gateway Drive [Member]
Initial Cost
Land	902,000
Building and Land Improvements	3,684,000
Costs Capitalized Subsequent to Acquisition	2,512,000
Gross Amounts Carried at Close of Period
Land	902,000
Building and Land Improvements	6,196,000
Total	7,098,000
Accumulated Depreciation		(2,452,000)
7065 Columbia Gateway Drive [Member]
Initial Cost
Land	919,000
Building and Land Improvements	3,763,000
Costs Capitalized Subsequent to Acquisition	3,095,000
Gross Amounts Carried at Close of Period
Land	919,000
Building and Land Improvements	6,858,000
Total	7,777,000
Accumulated Depreciation		(2,773,000)
7067 Columbia Gateway Drive [Member]
Initial Cost
Land	1,829,000
Building and Land Improvements	11,823,000
Costs Capitalized Subsequent to Acquisition	2,838,000
Gross Amounts Carried at Close of Period
Land	1,829,000
Building and Land Improvements	14,661,000
Total	16,490,000
Accumulated Depreciation		(6,154,000)
7125 Columbia Gateway Drive [Member]
Initial Cost
Land	3,361,000
Building and Land Improvements	1,677,000
Costs Capitalized Subsequent to Acquisition	279,000
Gross Amounts Carried at Close of Period
Land	3,361,000
Building and Land Improvements	1,956,000
Total	5,317,000
7125 Columbia Gateway Drive [Member]
Initial Cost
Land	17,126,000
Building and Land Improvements	46,994,000
Costs Capitalized Subsequent to Acquisition	9,813,000
Gross Amounts Carried at Close of Period
Land	17,126,000
Building and Land Improvements	56,807,000
Total	73,933,000
Accumulated Depreciation		(16,632,000)
7130 Columbia Gateway Drive [Member]
Initial Cost
Land	1,350,000
Building and Land Improvements	4,359,000
Costs Capitalized Subsequent to Acquisition	1,906,000
Gross Amounts Carried at Close of Period
Land	1,350,000
Building and Land Improvements	6,265,000
Total	7,615,000
Accumulated Depreciation		(2,692,000)
7134 Columbia Gateway Drive [Member]
Initial Cost
Land	704,000
Building and Land Improvements	2,139,000
Costs Capitalized Subsequent to Acquisition	314,000
Gross Amounts Carried at Close of Period
Land	704,000
Building and Land Improvements	2,453,000
Total	3,157,000
Accumulated Depreciation		(1,234,000)
7138 Columbia Gateway Drive [Member]
Initial Cost
Land	1,104,000
Building and Land Improvements	3,518,000
Costs Capitalized Subsequent to Acquisition	2,118,000
Gross Amounts Carried at Close of Period
Land	1,104,000
Building and Land Improvements	5,636,000
Total	6,740,000
Accumulated Depreciation		(3,139,000)
7142 Columbia Gateway Drive [Member]
Initial Cost
Land	1,342,000
Building and Land Improvements	3,978,000
Costs Capitalized Subsequent to Acquisition	2,502,000
Gross Amounts Carried at Close of Period
Land	1,342,000
Building and Land Improvements	6,480,000
Total	7,822,000
Accumulated Depreciation		(2,322,000)
7150 Columbia Gateway Drive [Member]
Initial Cost
Land	1,032,000
Building and Land Improvements	3,429,000
Costs Capitalized Subsequent to Acquisition	665,000
Gross Amounts Carried at Close of Period
Land	1,032,000
Building and Land Improvements	4,094,000
Total	5,126,000
Accumulated Depreciation		(1,170,000)
7150 Riverwood Drive [Member]
Initial Cost
Land	1,821,000
Building and Land Improvements	4,388,000
Costs Capitalized Subsequent to Acquisition	1,713,000
Gross Amounts Carried at Close of Period
Land	1,821,000
Building and Land Improvements	6,101,000
Total	7,922,000
Accumulated Depreciation		(1,933,000)
7160 Riverwood Drive [Member]
Initial Cost
Land	2,732,000
Building and Land Improvements	7,006,000
Costs Capitalized Subsequent to Acquisition	2,275,000
Gross Amounts Carried at Close of Period
Land	2,732,000
Building and Land Improvements	9,281,000
Total	12,013,000
Accumulated Depreciation		(3,265,000)
7170 Riverwood Drive [Member]
Initial Cost
Land	1,283,000
Building and Land Improvements	3,096,000
Costs Capitalized Subsequent to Acquisition	692,000
Gross Amounts Carried at Close of Period
Land	1,283,000
Building and Land Improvements	3,788,000
Total	5,071,000
Accumulated Depreciation		(1,386,000)
7175 Riverwood Drive [Member]
Initial Cost
Land	1,788,000
Building and Land Improvements	7,269,000
Gross Amounts Carried at Close of Period
Land	1,788,000
Building and Land Improvements	7,269,000
Total	9,057,000
Accumulated Depreciation		(389,000)
7200 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	6,649,000
Initial Cost
Land	0
Building and Land Improvements	8,347,000
Gross Amounts Carried at Close of Period
Land	0
Building and Land Improvements	8,347,000
Total	8,347,000
Accumulated Depreciation		(328,000)
7200 Riverwood Road [Member]
Initial Cost
Land	4,089,000
Building and Land Improvements	22,544,000
Costs Capitalized Subsequent to Acquisition	3,994,000
Gross Amounts Carried at Close of Period
Land	4,089,000
Building and Land Improvements	26,538,000
Total	30,627,000
Accumulated Depreciation		(8,761,000)
7205 Riverwood Drive [Member]
Initial Cost
Land	1,367,000
Building and Land Improvements	21,484,000
Gross Amounts Carried at Close of Period
Land	1,367,000
Building and Land Improvements	21,484,000
Total	22,851,000
Accumulated Depreciation		(1,310,000)
7272 Park Circle Drive [Member]
Real Estate and Accumulated Depreciation
Encumbrances	4,747,000
Initial Cost
Land	1,479,000
Building and Land Improvements	6,300,000
Costs Capitalized Subsequent to Acquisition	3,883,000
Gross Amounts Carried at Close of Period
Land	1,479,000
Building and Land Improvements	10,183,000
Total	11,662,000
Accumulated Depreciation		(2,956,000)
7318 Parkway Drive [Member]
Initial Cost
Land	972,000
Building and Land Improvements	3,888,000
Costs Capitalized Subsequent to Acquisition	1,002,000
Gross Amounts Carried at Close of Period
Land	972,000
Building and Land Improvements	4,890,000
Total	5,862,000
Accumulated Depreciation		(2,084,000)
7320 Parkway Drive [Member]
Initial Cost
Land	905,000
Building and Land Improvements	3,570,000
Costs Capitalized Subsequent to Acquisition	5,048,000
Gross Amounts Carried at Close of Period
Land	905,000
Building and Land Improvements	8,618,000
Total	9,523,000
Accumulated Depreciation		(2,883,000)
7400 Redstone Gateway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	7,292,000
Initial Cost
Land	0
Building and Land Improvements	9,012,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	0
Building and Land Improvements	9,012,000
Total	9,012,000
Accumulated Depreciation		(121,000)
7467 Ridge Road [Member]
Initial Cost
Land	1,629,000
Building and Land Improvements	6,517,000
Costs Capitalized Subsequent to Acquisition	3,645,000
Gross Amounts Carried at Close of Period
Land	1,629,000
Building and Land Improvements	10,162,000
Total	11,791,000
Accumulated Depreciation		(4,439,000)
7740 Milestone Parkway [Member]
Real Estate and Accumulated Depreciation
Encumbrances	18,987,000
Initial Cost
Land	3,825,000
Building and Land Improvements	34,176,000
Costs Capitalized Subsequent to Acquisition	404,000
Gross Amounts Carried at Close of Period
Land	3,825,000
Building and Land Improvements	34,580,000
Total	38,405,000
Accumulated Depreciation	(4,692,000)
7770 Backlick Road [Member]
Initial Cost
Land	6,387,000
Building and Land Improvements	74,325,000
Costs Capitalized Subsequent to Acquisition	141,000
Gross Amounts Carried at Close of Period
Land	6,387,000
Building and Land Improvements	74,466,000
Total	80,853,000
Accumulated Depreciation	(5,292,000)
7880 Milestone Parkway [Member]
Initial Cost
Land	4,857,000
Building and Land Improvements	23,647,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	4,857,000
Building and Land Improvements	23,647,000
Total	28,504,000
Accumulated Depreciation	(215,000)
8003 Corporate Drive [Member]
Initial Cost
Land	611,000
Building and Land Improvements	1,126,000
Costs Capitalized Subsequent to Acquisition	685,000
Gross Amounts Carried at Close of Period
Land	611,000
Building and Land Improvements	1,811,000
Total	2,422,000
Accumulated Depreciation	(99,000)
8007 Corporate Drive [Member]
Initial Cost
Land	1,434,000
Building and Land Improvements	350,000
Costs Capitalized Subsequent to Acquisition	1,218,000
Gross Amounts Carried at Close of Period
Land	1,434,000
Building and Land Improvements	1,568,000
Total	3,002,000
Accumulated Depreciation	(278,000)
8010 Corporate Drive [Member]
Initial Cost
Land	1,349,000
Building and Land Improvements	3,262,000
Costs Capitalized Subsequent to Acquisition	1,744,000
Gross Amounts Carried at Close of Period
Land	1,349,000
Building and Land Improvements	5,006,000
Total	6,355,000
Accumulated Depreciation	(1,448,000)
8013 Corporate Drive [Member]
Initial Cost
Land	642,000
Building and Land Improvements	1,072,000
Costs Capitalized Subsequent to Acquisition	1,808,000
Gross Amounts Carried at Close of Period
Land	642,000
Building and Land Improvements	2,880,000
Total	3,522,000
Accumulated Depreciation	(519,000)
8015 Corporate Drive [Member]
Initial Cost
Land	446,000
Building and Land Improvements	1,116,000
Costs Capitalized Subsequent to Acquisition	466,000
Gross Amounts Carried at Close of Period
Land	446,000
Building and Land Improvements	1,582,000
Total	2,028,000
Accumulated Depreciation	(468,000)
8019 Corporate Drive [Member]
Initial Cost
Land	680,000
Building and Land Improvements	1,898,000
Costs Capitalized Subsequent to Acquisition	825,000
Gross Amounts Carried at Close of Period
Land	680,000
Building and Land Improvements	2,723,000
Total	3,403,000
Accumulated Depreciation	(827,000)
8020 Corporate Drive [Member]
Initial Cost
Land	2,184,000
Building and Land Improvements	3,767,000
Costs Capitalized Subsequent to Acquisition	2,205,000
Gross Amounts Carried at Close of Period
Land	2,184,000
Building and Land Improvements	5,972,000
Total	8,156,000
Accumulated Depreciation	(1,703,000)
8023 Corporate Drive [Member]
Initial Cost
Land	651,000
Building and Land Improvements	1,164,000
Costs Capitalized Subsequent to Acquisition	5,000
Gross Amounts Carried at Close of Period
Land	651,000
Building and Land Improvements	1,169,000
Total	1,820,000
Accumulated Depreciation	(47,000)
8094 Sandpiper Circle [Member]
Initial Cost
Land	1,960,000
Building and Land Improvements	3,716,000
Costs Capitalized Subsequent to Acquisition	1,129,000
Gross Amounts Carried at Close of Period
Land	1,960,000
Building and Land Improvements	4,845,000
Total	6,805,000
Accumulated Depreciation	(1,267,000)
8098 Sandpiper Circle [Member]
Initial Cost
Land	1,797,000
Building and Land Improvements	3,651,000
Costs Capitalized Subsequent to Acquisition	639,000
Gross Amounts Carried at Close of Period
Land	1,797,000
Building and Land Improvements	4,290,000
Total	6,087,000
Accumulated Depreciation	(929,000)
8110 Corporate Drive [Member]
Initial Cost
Land	2,285,000
Building and Land Improvements	10,117,000
Costs Capitalized Subsequent to Acquisition	989,000
Gross Amounts Carried at Close of Period
Land	2,285,000
Building and Land Improvements	11,106,000
Total	13,391,000
Accumulated Depreciation	(3,133,000)
8140 Corporate Drive [Member]
Initial Cost
Land	2,158,000
Building and Land Improvements	8,457,000
Costs Capitalized Subsequent to Acquisition	3,163,000
Gross Amounts Carried at Close of Period
Land	2,158,000
Building and Land Improvements	11,620,000
Total	13,778,000
Accumulated Depreciation	(4,117,000)
8621 Robert Fulton Drive [Member]
Initial Cost
Land	2,317,000
Building and Land Improvements	12,642,000
Costs Capitalized Subsequent to Acquisition	344,000
Gross Amounts Carried at Close of Period
Land	2,317,000
Building and Land Improvements	12,986,000
Total	15,303,000
Accumulated Depreciation	(3,378,000)
8661 Robert Fulton Drive [Member]
Initial Cost
Land	1,510,000
Building and Land Improvements	3,764,000
Costs Capitalized Subsequent to Acquisition	2,420,000
Gross Amounts Carried at Close of Period
Land	1,510,000
Building and Land Improvements	6,184,000
Total	7,694,000
Accumulated Depreciation	(2,117,000)
8671 Robert Fulton Drive [Member]
Initial Cost
Land	1,718,000
Building and Land Improvements	4,280,000
Costs Capitalized Subsequent to Acquisition	3,931,000
Gross Amounts Carried at Close of Period
Land	1,718,000
Building and Land Improvements	8,211,000
Total	9,929,000
Accumulated Depreciation	(3,060,000)
870 Elkridge Landing Road [Member]
Initial Cost
Land	2,003,000
Building and Land Improvements	9,442,000
Costs Capitalized Subsequent to Acquisition	7,616,000
Gross Amounts Carried at Close of Period
Land	2,003,000
Building and Land Improvements	17,058,000
Total	19,061,000
Accumulated Depreciation	(8,411,000)
891 Elkridge Landing Road [Member]
Initial Cost
Land	1,165,000
Building and Land Improvements	4,772,000
Costs Capitalized Subsequent to Acquisition	2,928,000
Gross Amounts Carried at Close of Period
Land	1,165,000
Building and Land Improvements	7,700,000
Total	8,865,000
Accumulated Depreciation	(3,488,000)
900 Elkridge Landing Road [Member]
Initial Cost
Land	1,993,000
Building and Land Improvements	7,972,000
Costs Capitalized Subsequent to Acquisition	3,603,000
Gross Amounts Carried at Close of Period
Land	1,993,000
Building and Land Improvements	11,575,000
Total	13,568,000
Accumulated Depreciation	(6,009,000)
901 Elkridge Landing Road [Member]
Initial Cost
Land	1,156,000
Building and Land Improvements	4,437,000
Costs Capitalized Subsequent to Acquisition	2,390,000
Gross Amounts Carried at Close of Period
Land	1,156,000
Building and Land Improvements	6,827,000
Total	7,983,000
Accumulated Depreciation	(3,015,000)
911 Elkridge Landing Road [Member]
Initial Cost
Land	1,215,000
Building and Land Improvements	4,861,000
Costs Capitalized Subsequent to Acquisition	2,024,000
Gross Amounts Carried at Close of Period
Land	1,215,000
Building and Land Improvements	6,885,000
Total	8,100,000
Accumulated Depreciation	(3,462,000)
921 Elkridge Landing Road [Member]
Initial Cost
Land	1,044,000
Building and Land Improvements	4,727,000
Costs Capitalized Subsequent to Acquisition	748,000
Gross Amounts Carried at Close of Period
Land	1,044,000
Building and Land Improvements	5,475,000
Total	6,519,000
Accumulated Depreciation	(4,924,000)
938 Elkridge Landing Road [Member]
Initial Cost
Land	922,000
Building and Land Improvements	4,748,000
Costs Capitalized Subsequent to Acquisition	1,263,000
Gross Amounts Carried at Close of Period
Land	922,000
Building and Land Improvements	6,011,000
Total	6,933,000
Accumulated Depreciation	(2,116,000)
939 Elkridge Landing Road [Member]
Initial Cost
Land	939,000
Building and Land Improvements	3,756,000
Costs Capitalized Subsequent to Acquisition	4,245,000
Gross Amounts Carried at Close of Period
Land	939,000
Building and Land Improvements	8,001,000
Total	8,940,000
Accumulated Depreciation	(3,337,000)
940 Elkridge Landing Road [Member]
Initial Cost
Land	842,000
Building and Land Improvements	4,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amounts Carried at Close of Period
Land	842,000
Building and Land Improvements	4,000
Total	846,000
Accumulated Depreciation	0
9651 Hornbaker Road [Member]
Initial Cost
Land	6,050,000
Building and Land Improvements	249,706,000
Costs Capitalized Subsequent to Acquisition	985,000
Gross Amounts Carried at Close of Period
Land	6,050,000
Building and Land Improvements	250,691,000
Total	256,741,000
Accumulated Depreciation	(18,119,000)
Aerotech Commerce [Member]
Initial Cost
Land	900,000
Gross Amounts Carried at Close of Period
Land	900,000
Total	900,000
Arborcrest [Member]
Initial Cost
Land	21,968,000
Building and Land Improvements	122,759,000
Costs Capitalized Subsequent to Acquisition	1,301,000
Gross Amounts Carried at Close of Period
Land	21,968,000
Building and Land Improvements	124,060,000
Total	146,028,000
Accumulated Depreciation	(25,901,000)
Arundel Preserve [Member]
Initial Cost
Land	13,401,000
Building and Land Improvements	9,331,000
Gross Amounts Carried at Close of Period
Land	13,401,000
Building and Land Improvements	9,331,000
Total	22,732,000
Ashburn Crossing - DC 10 [Member]
Initial Cost
Land	4,408,000
Building and Land Improvements	10,689,000
Gross Amounts Carried at Close of Period
Land	4,408,000
Building and Land Improvements	10,689,000
Total	15,097,000
Accumulated Depreciation	(225,000)
Canton Crossing Land [Member]
Initial Cost
Land	16,085,000
Building and Land Improvements	2,134,000
Gross Amounts Carried at Close of Period
Land	16,085,000
Building and Land Improvements	2,134,000
Total	18,219,000
Canton Crossing Util Distr Ctr [Member]
Initial Cost
Land	7,300,000
Building and Land Improvements	15,556,000
Costs Capitalized Subsequent to Acquisition	942,000
Gross Amounts Carried at Close of Period
Land	7,300,000
Building and Land Improvements	16,498,000
Total	23,798,000
Accumulated Depreciation	(3,326,000)
Columbia Gateway - Southridge [Member]
Initial Cost
Land	6,387,000
Building and Land Improvements	3,539,000
Gross Amounts Carried at Close of Period
Land	6,387,000
Building and Land Improvements	3,539,000
Total	9,926,000
Dahlgren Technology Center [Member]
Initial Cost
Land	978,000
Building and Land Improvements	178,000
Gross Amounts Carried at Close of Period
Land	978,000
Building and Land Improvements	178,000
Total	1,156,000
Expedition VII [Member]
Initial Cost
Land	705,000
Building and Land Improvements	728,000
Gross Amounts Carried at Close of Period
Land	705,000
Building and Land Improvements	728,000
Total	1,433,000
InterQuest [Member]
Initial Cost
Land	8,201,000
Building and Land Improvements	0
Gross Amounts Carried at Close of Period
Land	8,201,000
Building and Land Improvements	0
Total	8,201,000
M Square Research Park [Member]
Initial Cost
Building and Land Improvements	2,986,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	2,986,000
Total	2,986,000
National Business Park North [Member]
Initial Cost
Land	28,066,000
Building and Land Improvements	41,936,000
Gross Amounts Carried at Close of Period
Land	28,066,000
Building and Land Improvements	41,936,000
Total	70,002,000
North Gate Business Park [Member]
Initial Cost
Land	6,309,000
Building and Land Improvements	4,540,000
Gross Amounts Carried at Close of Period
Land	6,309,000
Building and Land Improvements	4,540,000
Total	10,849,000
Northwest Crossroads [Member]
Initial Cost
Land	7,430,000
Building and Land Improvements	847,000
Gross Amounts Carried at Close of Period
Land	7,430,000
Building and Land Improvements	847,000
Total	8,277,000
NOVA Office A [Member]
Initial Cost
Land	2,096,000
Building and Land Improvements	47,364,000
Gross Amounts Carried at Close of Period
Land	2,096,000
Building and Land Improvements	47,364,000
Total	49,460,000
Accumulated Depreciation	(1,046,000)
NOVA Office B [Member]
Initial Cost
Land	739,000
Building and Land Improvements	26,277,000
Gross Amounts Carried at Close of Period
Land	739,000
Building and Land Improvements	26,277,000
Total	27,016,000
NOVA Office D [Member]
Initial Cost
Land	6,587,000
Building and Land Improvements	103,000
Gross Amounts Carried at Close of Period
Land	6,587,000
Building and Land Improvements	103,000
Total	6,690,000
Old Annapolis Road [Member]
Initial Cost
Land	1,637,000
Building and Land Improvements	5,500,000
Costs Capitalized Subsequent to Acquisition	3,457,000
Gross Amounts Carried at Close of Period
Land	1,637,000
Building and Land Improvements	8,957,000
Total	10,594,000
Accumulated Depreciation	(2,983,000)
Patriot Park [Member]
Initial Cost
Land	2,328,000
Building and Land Improvements	1,000
Gross Amounts Carried at Close of Period
Land	2,328,000
Building and Land Improvements	1,000
Total	2,329,000
Patriot Point - DC15 [Member]
Initial Cost
Land	12,156,000
Building and Land Improvements	7,112,000
Gross Amounts Carried at Close of Period
Land	12,156,000
Building and Land Improvements	7,112,000
Total	19,268,000
Patriot Point - DC16 [Member]
Initial Cost
Land	12,156,000
Building and Land Improvements	4,110,000
Gross Amounts Carried at Close of Period
Land	12,156,000
Building and Land Improvements	4,110,000
Total	16,266,000
Patriot Point - DC17 [Member]
Initial Cost
Land	6,078,000
Building and Land Improvements	472,000
Gross Amounts Carried at Close of Period
Land	6,078,000
Building and Land Improvements	472,000
Total	6,550,000
Patriot Ridge [Member]
Initial Cost
Land	18,517,000
Building and Land Improvements	14,423,000
Gross Amounts Carried at Close of Period
Land	18,517,000
Building and Land Improvements	14,423,000
Total	32,940,000
Redstone Gateway [Member]
Initial Cost
Building and Land Improvements	14,250,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	14,250,000
Total	14,250,000
Route 15/Biggs Ford Road [Member]
Initial Cost
Land	8,703,000
Building and Land Improvements	596,000
Gross Amounts Carried at Close of Period
Land	8,703,000
Building and Land Improvements	596,000
Total	9,299,000
Sentry Gateway [Member]
Initial Cost
Land	8,275,000
Building and Land Improvements	3,645,000
Gross Amounts Carried at Close of Period
Land	8,275,000
Building and Land Improvements	3,645,000
Total	11,920,000
Sentry Gateway - T [Member]
Initial Cost
Land	14,020,000
Building and Land Improvements	38,804,000
Costs Capitalized Subsequent to Acquisition	13,000
Gross Amounts Carried at Close of Period
Land	14,020,000
Building and Land Improvements	38,817,000
Total	52,837,000
Accumulated Depreciation	(8,618,000)
Sentry Gateway - V [Member]
Initial Cost
Building and Land Improvements	1,066,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	1,066,000
Total	1,066,000
Accumulated Depreciation	(188,000)
Sentry Gateway - W [Member]
Initial Cost
Building and Land Improvements	1,884,000
Gross Amounts Carried at Close of Period
Building and Land Improvements	1,884,000
Total	1,884,000
Accumulated Depreciation	(296,000)
Sentry Gateway - X [Member]
Initial Cost
Land	1,964,000
Building and Land Improvements	21,178,000
Gross Amounts Carried at Close of Period
Land	1,964,000
Building and Land Improvements	21,178,000
Total	23,142,000
Accumulated Depreciation	(2,728,000)
Sentry Gateway - Y [Member]
Initial Cost
Land	1,964,000
Building and Land Improvements	21,298,000
Gross Amounts Carried at Close of Period
Land	1,964,000
Building and Land Improvements	21,298,000
Total	23,262,000
Accumulated Depreciation	(2,745,000)
Sentry Gateway - Z [Member]
Initial Cost
Land	1,964,000
Building and Land Improvements	30,335,000
Gross Amounts Carried at Close of Period
Land	1,964,000
Building and Land Improvements	30,335,000
Total	32,299,000
Accumulated Depreciation	(616,000)
Southpoint Manassas - DC12 [Member]
Initial Cost
Land	4,518,000
Building and Land Improvements	12,701,000
Gross Amounts Carried at Close of Period
Land	4,518,000
Building and Land Improvements	12,701,000
Total	17,219,000
Accumulated Depreciation	(127,000)
Southpoint Manassas - DC14 [Member]
Initial Cost
Land	4,518,000
Building and Land Improvements	13,009,000
Gross Amounts Carried at Close of Period
Land	4,518,000
Building and Land Improvements	13,009,000
Total	17,527,000
Accumulated Depreciation	(101,000)
Westfields - Park Center [Member]
Initial Cost
Land	16,418,000
Building and Land Improvements	7,488,000
Gross Amounts Carried at Close of Period
Land	16,418,000
Building and Land Improvements	7,488,000
Total	23,906,000
Westfields Corporate Center [Member]
Initial Cost
Land	7,141,000
Building and Land Improvements	1,423,000
Gross Amounts Carried at Close of Period
Land	7,141,000
Building and Land Improvements	1,423,000
Total	8,564,000
White Marsh [Member]
Initial Cost
Land	7,852,000
Building and Land Improvements	2,570,000
Gross Amounts Carried at Close of Period
Land	7,852,000
Building and Land Improvements	2,570,000
Total	10,422,000
Woodland Park [Member]
Initial Cost
Land	9,614,000
Building and Land Improvements	85,000
Gross Amounts Carried at Close of Period
Land	9,614,000
Building and Land Improvements	85,000
Total	9,699,000
Other Developments, including intercompany eliminations [Member]
Initial Cost
Land	94,000
Building and Land Improvements	34,000
Costs Capitalized Subsequent to Acquisition	431,000
Gross Amounts Carried at Close of Period
Land	94,000
Building and Land Improvements	465,000
Total	559,000
Accumulated Depreciation	(39,000)
Fair value measurement on a nonrecurring basis [Member] | Real Estate Held [Member]
Additional information
Impairment losses	22,000,000
Fair value measurement on a nonrecurring basis [Member] | Real Estate Investment Properties, Net [Member]
Additional information
Impairment losses	$ 23,500,000	$ 1,400,000