Schedule III - Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2011

Real Estate and Accumulated Depreciation Disclosure [Abstract]

Real Estate and Accumulated Depreciation

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
PENNSYLVANIA SUBURBS
400 Berwyn Park	Berwyn	PA	—	2,657	4,462	15,031		2,657	19,493	22,150	6,742	1999	1999	40
300 Berwyn Park	Berwyn	PA	9,971	2,206	13,422	4,161		2,206	17,583	19,789	6,554	1989	1997	40
1200 Swedesford Road	Berwyn	PA	1,887	2,595	11,809	3,778		2,596	15,586	18,182	3,893	1994	2001	40
1050 Westlakes Drive	Berwyn	PA	—	2,611	10,445	5,046		2,611	15,491	18,102	5,820	1984	1999	40
200 Berwyn Park	Berwyn	PA	6,887	1,533	9,460	1,615		1,533	11,075	12,608	4,512	1987	1997	40
1180 Swedesford Road	Berwyn	PA	—	2,086	8,342	1,262		2,085	9,605	11,690	3,198	1987	2001	40
100 Berwyn Park	Berwyn	PA	5,299	1,180	7,290	2,144		1,180	9,434	10,614	3,636	1986	1997	40
1160 Swedesford Road	Berwyn	PA	—	1,781	7,124	1,071		1,781	8,195	9,976	2,690	1986	2001	40
1100 Cassett Road	Berwyn	PA	—	1,695	6,779	102		1,694	6,882	8,576	1,823	1997	2001	40
980 Harvest Drive	Blue Bell	PA	—	3,304	16,960	(808	)	3,304	16,152	19,456	5,167	1988	2002	40
925 Harvest Drive	Blue Bell	PA	—	1,671	6,606	770		1,670	7,377	9,047	2,837	1990	1998	40
920 Harvest Drive	Blue Bell	PA	—	1,209	6,595	(125	)	1,208	6,471	7,679	3,088	1990	1998	40
426 Lancaster Avenue	Devon	PA	—	1,689	6,756	405		1,688	7,162	8,850	2,884	1990	1998	40
52 Swedesford Square	East Whiteland Twp.	PA	—	4,241	16,579	557		4,241	17,136	21,377	6,341	1988	1998	40
429 Creamery Way	Exton	PA	—	1,368	5,471	451		1,368	5,922	7,290	1,667	1996	2001	40
412 Creamery Way	Exton	PA	—	1,195	4,779	1,123		1,195	5,902	7,097	1,612	1999	2001	40
440 Creamery Way	Exton	PA	—	982	3,927	1,900		982	5,827	6,809	2,124	1991	2001	40
436 Creamery Way	Exton	PA	—	994	3,978	686		994	4,664	5,658	1,251	1991	2001	40
467 Creamery Way	Exton	PA	—	906	3,623	1,070		906	4,693	5,599	1,353	1988	2001	40
100 Arrandale Boulevard	Exton	PA	—	970	3,878	274		970	4,152	5,122	1,275	1997	2001	40
457 Creamery Way	Exton	PA	—	777	3,107	1,035		777	4,142	4,919	1,062	1990	2001	40
486 Thomas Jones Way	Exton	PA	—	806	3,256	605		806	3,861	4,667	1,710	1990	1996	40
468 Thomas Jones Way	Exton	PA	—	526	2,112	612		526	2,724	3,250	972	1990	1996	40
456 Creamery Way	Exton	PA	—	635	2,548	(48	)	636	2,499	3,135	1,135	1987	1996	40
481 John Young Way	Exton	PA	—	496	1,983	14		496	1,997	2,493	540	1997	2001	40
111 Arrandale Road	Exton	PA	—	262	1,048	125		262	1,173	1,435	404	1996	2001	40
One Progress Drive	Horsham	PA	—	1,399	5,629	4,466		1,399	10,095	11,494	2,777	1986	1996	40
500 Enterprise Drive	Horsham	PA	—	1,303	5,188	3,228		1,303	8,416	9,719	2,566	1990	1996	40
640 Freedom Business Center	King Of Prussia	PA	—	4,222	16,891	2,964		4,222	19,855	24,077	7,867	1991	1998	40
555 Croton Road	King of Prussia	PA	—	4,486	17,943	1,215		4,486	19,158	23,644	5,461	1999	2001	40
630 Allendale Road	King of Prussia	PA	—	2,836	4,028	12,275		2,636	16,503	19,139	4,385	2000	2000	40
1000 First Avenue	King Of Prussia	PA	—	2,772	10,936	3,524		2,772	14,460	17,232	5,838	1980	1998	40
620 Freedom Business Center	King Of Prussia	PA	—	2,770	11,014	3,413		2,769	14,428	17,197	6,184	1986	1998	40
1060 First Avenue	King Of Prussia	PA	—	2,712	10,953	2,378		2,712	13,331	16,043	5,006	1987	1998	40
1040 First Avenue	King Of Prussia	PA	—	2,860	11,282	1,303		2,860	12,585	15,445	4,717	1985	1998	40

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
630 Freedom Business Center	King Of Prussia	PA	—	2,773	11,144	1,199		2,773	12,343	15,116	4,910	1989	1998	40
1020 First Avenue	King Of Prussia	PA	—	2,168	8,576	4,117		2,168	12,693	14,861	5,079	1984	1998	40
610 Freedom Business Center	King Of Prussia	PA	—	2,017	8,070	1,195		2,017	9,265	11,282	3,546	1985	1998	40
500 North Gulph Road	King Of Prussia	PA	—	1,303	5,201	1,834		1,303	7,035	8,338	2,988	1979	1996	40
650 Park Avenue	King Of Prussia	PA	—	1,916	4,378	2,042		1,917	6,419	8,336	2,819	1968	1998	40
741 First Avenue	King Of Prussia	PA	—	1,287	5,151	12		1,288	5,162	6,450	1,996	1966	1998	40
875 First Avenue	King Of Prussia	PA	—	618	2,473	3,239		618	5,712	6,330	2,438	1966	1998	40
751-761 Fifth Avenue	King Of Prussia	PA	—	1,097	4,391	31		1,097	4,422	5,519	1,712	1967	1998	40
600 Park Avenue	King Of Prussia	PA	—	1,012	4,048	385		1,012	4,433	5,445	1,684	1964	1998	40
620 Allendale Road	King Of Prussia	PA	—	1,020	3,839	503		1,020	4,342	5,362	1,645	1961	1998	40
660 Allendale Road	King Of Prussia	PA	—	396	948	2,505		1,085	2,764	3,849	42	2011	1998	40
640 Allendale Road	King of Prussia	PA	—	439	432	1,553		439	1,985	2,424	564	2000	2000	40
101 Lindenwood Drive	Malvern	PA	—	4,152	16,606	3,331		4,152	19,937	24,089	4,954	1988	2001	40
301 Lindenwood Drive	Malvern	PA	—	2,729	10,915	1,264		2,729	12,179	14,908	3,541	1984	2001	40
300 Lindenwood Drive	Malvern	PA	—	848	3,394	1,334		849	4,727	5,576	1,532	1991	2001	40
1700 Paoli Pike	Malvern	PA	—	458	559	3,018		488	3,547	4,035	977	2000	2000	40
100 Lindenwood Drive	Malvern	PA	—	473	1,892	188		474	2,079	2,553	575	1985	2001	40
200 Lindenwood Drive	Malvern	PA	—	324	1,295	335		324	1,630	1,954	378	1984	2001	40
14 Campus Boulevard	Newtown Square	PA	6,384	2,244	4,217	1,515		2,243	5,733	7,976	2,311	1998	1998	40
11 Campus Boulevard	Newtown Square	PA	4,379	1,112	4,067	1,047		1,112	5,114	6,226	1,836	1998	1999	40
17 Campus Boulevard	Newtown Square	PA	4,458	1,108	5,155	(397	)	1,108	4,758	5,866	1,098	2001	N/A	40
15 Campus Boulevard	Newtown Square	PA	4,555	1,164	3,896	229		1,164	4,125	5,289	1,016	2002	N/A	40
18 Campus Boulevard	Newtown Square	PA	3,431	787	3,312	313		787	3,625	4,412	1,780	1990	1996	40
401 Plymouth Road	Plymouth Meeting	PA	—	6,198	16,131	15,959		6,199	32,089	38,288	8,130	2001	N/A	40
4000 Chemical Road	Plymouth Meeting	PA	—	4,373	24,546	4,509		4,373	29,055	33,428	4,005	2006	N/A	40
610 West Germantown Pike	Plymouth Meeting	PA	—	3,651	14,514	3,017		3,651	17,531	21,182	4,595	1987	2002	40
600 West Germantown Pike	Plymouth Meeting	PA	—	3,652	15,288	1,958		3,652	17,246	20,898	4,225	1986	2002	40
630 West Germantown Pike	Plymouth Meeting	PA	—	3,558	14,743	2,199		3,558	16,942	20,500	4,585	1988	2002	40
620 West Germantown Pike	Plymouth Meeting	PA	—	3,572	14,435	1,220		3,572	15,655	19,227	3,921	1990	2002	40
2240/2250 Butler Pike	Plymouth Meeting	PA	—	1,104	4,627	1,277		1,104	5,904	7,008	2,929	1984	1996	40
2260 Butler Pike	Plymouth Meeting	PA	—	661	2,727	1,198		662	3,924	4,586	1,710	1984	1996	40
120 West Germantown Pike	Plymouth Meeting	PA	—	685	2,773	631		685	3,404	4,089	1,481	1984	1996	40
140 West Germantown Pike	Plymouth Meeting	PA	—	481	1,976	318		481	2,294	2,775	1,096	1984	1996	40
351 Plymouth Road	Plymouth Meeting	PA	—	1,043	555	—		1,043	555	1,598	94	N/A	2000	40
150 Radnor Chester Road	Radnor	PA	—	11,925	36,986	12,838		11,897	49,852	61,749	12,855	1983	2004	29
One Radnor Corporate Center	Radnor	PA	—	7,323	28,613	22,241		7,323	50,854	58,177	10,296	1998	2004	29
201 King of Prussia Road	Radnor	PA	—	8,956	29,811	6,700		8,949	36,518	45,467	11,783	2001	2004	25

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
555 Lancaster Avenue	Radnor	PA	—	8,014	16,508	18,711		8,609	34,624	43,233	9,207	1973	2004	24
Four Radnor Corporate Center	Radnor	PA	—	5,406	21,390	11,350		5,705	32,441	38,146	9,291	1995	2004	30
Five Radnor Corporate Center	Radnor	PA	—	6,506	25,525	2,159		6,578	27,612	34,190	6,414	1998	2004	38
Three Radnor Corporate Center	Radnor	PA	—	4,773	17,961	2,361		4,792	20,303	25,095	5,259	1998	2004	29
Two Radnor Corporate Center	Radnor	PA	—	3,937	15,484	1,208		3,942	16,687	20,629	4,396	1998	2004	29
130 Radnor Chester Road	Radnor	PA	—	2,573	8,338	3,542		2,568	11,885	14,453	2,788	1983	2004	25
170 Radnor Chester Road	Radnor	PA	—	2,514	8,147	3,283		2,508	11,436	13,944	3,203	1983	2004	25
101 West Elm Street	W. Conshohocken	PA	—	6,251	25,209	3,010		6,252	28,218	34,470	4,845	1999	2005	40
1 West Elm Street	W. Conshohocken	PA	—	3,557	14,249	1,128		3,557	15,377	18,934	2,497	1999	2005	40
595 East Swedesford Road	Wayne	PA	—	2,729	10,917	2,072		2,729	12,989	15,718	2,939	1998	2003	40
575 East Swedesford Road	Wayne	PA	—	2,178	8,712	1,630		2,178	10,342	12,520	2,551	1985	2003	40
565 East Swedesford Road	Wayne	PA	—	1,872	7,489	1,785		1,872	9,274	11,146	2,208	1984	2003	40
585 East Swedesford Road	Wayne	PA	—	1,350	5,401	358		1,351	5,758	7,109	1,325	1998	2003	40
1336 Enterprise Drive	West Goshen	PA	—	731	2,946	47		731	2,993	3,724	1,275	1989	1997	40
PHILADELPHIA CBD
2970 Market Street	Philadelphia	PA	202,905	22,430	217,763	9,956		22,430	227,719	250,149	8,408	2010	2007	40
2929 Arch Street	Philadelphia	PA	—	—	208,570	18,366		—	226,936	226,936	55,716	2005	N/A	40
130 North 18th Street	Philadelphia	PA	—	14,496	107,736	10,054		14,473	117,813	132,286	28,639	1998	2004	23
100 North 18th Street	Philadelphia	PA	89,800	16,066	100,255	5,671		16,066	105,926	121,992	26,011	1988	2004	33
1717 Arch Street	Philadelphia	PA	—	—	98,188	3,346		—	101,534	101,534	7,383	1990	2010	40
2930 Chestnut Street	Philadelphia	PA	44,379	—	76,008	3,064		—	79,072	79,072	2,600	2010	N/A	40
3020 Market Street	Philadelphia	PA	—	—	21,417	20		—	21,437	21,437	277	1959	2011	26
101 - 103 Juniper Street	Philadelphia	PA	—	—	14,401	76		—	14,477	14,477	212	2010	2006	40
Philadelphia Marine Center	Philadelphia	PA	—	532	2,196	3,236		628	5,336	5,964	1,749	Various	1998	40
METROPOLITAN WASHINGTON, D.C.
11720 Beltsville Drive	Beltsville	MD	—	3,831	16,661	4,047		3,903	20,636	24,539	4,357	1987	2006	46
11700 Beltsville Drive	Beltsville	MD	—	2,808	12,081	339		2,863	12,365	15,228	2,033	1981	2006	46
11710 Beltsville Drive	Beltsville	MD	—	2,278	11,100	(769	)	2,322	10,288	12,610	1,578	1987	2006	46
6600 Rockledge Drive	Bethesda	MD	—	—	37,421	11,145		—	48,566	48,566	8,529	1981	2006	50
11740 Beltsville Drive	Bethesda	MD	—	198	870	42		203	908	1,111	146	1987	2006	46
12015 Lee Jackson Memorial Highway	Fairfax	VA	—	3,770	22,895	2,702		3,841	25,526	29,367	3,937	1985	2006	42
11781 Lee Jackson Memorial Highway	Fairfax	VA	—	3,246	19,836	(289	)	3,307	19,487	22,794	3,572	1982	2006	40
4401 Fair Lakes Court	Fairfax	VA	—	1,569	11,982	284		1,600	12,236	13,836	1,738	1988	2006	52
3141 Fairview Park Drive (d)	Falls Church	VA	22,000	5,918	40,981	8,917		7,081	48,736	55,817	6,499	1988	2006	51

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
2340 Dulles Corner Boulevard	Herndon	VA	—	16,345	65,379	18,370		16,129	83,965	100,094	17,616	1987	2006	40
13820 Sunrise Valley Drive	Herndon	VA	—	11,082	47,290	19,687		11,082	66,977	78,059	8,334	2007	N/A	40
2291 Wood Oak Drive	Herndon	VA	—	8,243	52,413	12,805		8,781	64,680	73,461	6,930	1999	2006	55
2355 Dulles Corner Boulevard	Herndon	VA	—	10,365	43,876	4,418		10,364	48,295	58,659	7,804	1988	2006	40
196/198 Van Buren Street	Herndon	VA	—	7,931	43,812	6,058		8,348	49,453	57,801	7,660	1991	2006	53
2251 Corporate Park Drive	Herndon	VA	—	11,472	45,893	337		11,471	46,231	57,702	5,942	2000	2006	40
2411 Dulles Corner Park	Herndon	VA	—	7,279	46,340	3,691		7,416	49,894	57,310	7,736	1990	2006	50
2121 Cooperative Way	Herndon	VA	—	5,598	38,639	1,330		5,794	39,772	45,566	4,593	2000	2006	54
13880 Dulles Corner Lane	Herndon	VA	—	7,236	39,213	(1,132	)	7,373	37,943	45,316	4,816	1997	2006	55
2201 Cooperative Way	Herndon	VA	—	4,809	34,093	(678	)	4,809	33,416	38,225	3,936	1990	2006	54
13825 Sunrise Valley Drive	Herndon	VA	—	3,794	19,365	(851	)	3,865	18,443	22,308	2,480	1989	2006	46
1676 International Drive	Mclean	VA	61,976	18,437	97,538	1,650		18,785	98,840	117,625	13,100	1999	2006	55
8260 Greensboro Drive	Mclean	VA	32,906	7,952	33,964	242		8,103	34,055	42,158	4,509	1980	2006	52
1880 Campus Commons Drive	Reston	VA	—	6,164	28,114	1,714		6,281	29,711	35,992	3,636	1985	2006	52
2273 Research Boulevard	Rockville	MD	—	5,167	31,110	3,179		5,237	34,219	39,456	6,197	1999	2006	45
2275 Research Boulevard	Rockville	MD	—	5,059	29,668	2,372		5,154	31,945	37,099	5,358	1990	2006	45
2277 Research Boulevard	Rockville	MD	—	4,649	26,952	823		4,733	27,690	32,423	4,304	1986	2006	45
1900 Gallows Road	Vienna	VA	—	7,797	47,817	2,978		7,944	50,648	58,592	6,300	1989	2006	52
8521 Leesburg Pike	Vienna	VA	—	4,316	30,885	(1,004	)	4,397	29,799	34,196	4,022	1984	2006	51
NEW JERSEY/DELAWARE
457 Haddonfield Road	Cherry Hill	NJ	11,175	2,142	9,120	853		2,142	9,973	12,115	4,138	1990	1996	40
220 Lake Drive East	Cherry Hill	NJ	—	2,144	8,798	863		2,144	9,661	11,805	2,799	1988	2001	40
200 Lake Drive East	Cherry Hill	NJ	—	2,069	8,275	1,244		2,068	9,520	11,588	2,559	1989	2001	40
210 Lake Drive East	Cherry Hill	NJ	—	1,645	6,579	1,332		1,645	7,911	9,556	2,222	1986	2001	40
6 East Clementon Road	Gibbsboro	NJ	—	1,345	5,366	682		1,345	6,048	7,393	2,303	1980	1997	40
20 East Clementon Road	Gibbsboro	NJ	—	769	3,055	582		768	3,638	4,406	1,425	1986	1997	40
10 Foster Avenue	Gibbsboro	NJ	—	244	971	118		244	1,089	1,333	450	1983	1997	40
7 Foster Avenue	Gibbsboro	NJ	—	231	921	16		231	937	1,168	373	1983	1997	40
50 East Clementon Road	Gibbsboro	NJ	—	114	964	3		114	967	1,081	383	1986	1997	40
2 Foster Avenue	Gibbsboro	NJ	—	185	730	16		185	746	931	297	1974	1997	40
4 Foster Avenue	Gibbsboro	NJ	—	183	726	5		182	732	914	290	1974	1997	40
1 Foster Avenue	Gibbsboro	NJ	—	93	364	76		93	440	533	185	1972	1997	40
5 U.S. Avenue	Gibbsboro	NJ	—	21	81	3		21	84	105	33	1987	1997	40
5 Foster Avenue	Gibbsboro	NJ	—	9	32	26		9	58	67	23	1968	1997	40

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
1009 Lenox Drive	Lawrenceville	NJ	—	4,876	19,284	4,373		5,118	23,415	28,533	9,039	1989	1998	40
989 Lenox Drive	Lawrenceville	NJ	—	3,701	14,802	1,420		3,850	16,073	19,923	3,610	1984	2003	40
997 Lenox Drive	Lawrenceville	NJ	—	2,410	9,700	4,442		2,540	14,012	16,552	4,781	1987	1998	40
2000 Lenox Drive	Lawrenceville	NJ	—	2,291	12,221	1,975		2,684	13,803	16,487	3,499	2000	2000	40
993 Lenox Drive	Lawrenceville	NJ	—	2,811	17,996	(4,369	)	2,960	13,478	16,438	5,196	1985	1998	40
1200 Lenox Drive	Lawrenceville	NJ	—	1,071	12,967	1,238		1,071	14,205	15,276	1,846	2007	N/A	40
100 Lenox Drive	Lawrenceville	NJ	—	—	—	12,103		1,134	10,969	12,103	1,815	1977	1999	40
1000 Lenox Drive	Lawrenceville	NJ	—	1,174	4,696	2,180		1,244	6,806	8,050	2,677	1982	2002	40
1120 Executive Boulevard	Marlton	NJ	—	2,074	8,415	1,804		2,074	10,219	12,293	4,200	1987	1997	40
Two Eves Drive	Marlton	NJ	—	818	3,461	178		819	3,638	4,457	1,575	1987	1997	40
Five Eves Drive	Marlton	NJ	—	703	2,819	511		703	3,330	4,033	1,392	1986	1997	40
Four B Eves Drive	Marlton	NJ	—	588	2,369	361		589	2,729	3,318	1,180	1987	1997	40
Four A Eves Drive	Marlton	NJ	—	539	2,168	136		538	2,305	2,843	1,011	1987	1997	40
308 Harper Drive	Moorestown	NJ	—	1,643	6,663	1,070		1,644	7,732	9,376	2,685	1976	1998	40
304 Harper Drive	Moorestown	NJ	—	657	2,674	359		657	3,033	3,690	1,161	1975	1998	40
700 East Gate Drive	Mt. Laurel	NJ	—	3,569	14,436	2,122		3,568	16,559	20,127	6,205	1984	1998	40
10000 Midlantic Drive	Mt. Laurel	NJ	—	3,206	12,857	1,473		3,206	14,330	17,536	6,306	1990	1997	40
15000 Midlantic Drive	Mt. Laurel	NJ	—	3,061	12,254	1,070		3,061	13,324	16,385	5,351	1991	1997	40
1000 Atrium Way	Mt. Laurel	NJ	—	2,061	8,180	3,583		2,062	11,762	13,824	4,788	1989	1997	40
1000 Howard Boulevard	Mt. Laurel	NJ	—	2,297	9,288	1,378		2,297	10,666	12,963	4,294	1988	1997	40
2000 Midlantic Drive	Mt. Laurel	NJ	—	2,202	8,823	1,905		2,203	10,727	12,930	3,953	1989	1997	40
701 East Gate Drive	Mt. Laurel	NJ	—	1,736	6,877	1,277		1,736	8,154	9,890	2,843	1986	1998	40
307 Fellowship Drive	Mt. Laurel	NJ	—	1,565	6,342	1,295		1,564	7,638	9,202	2,658	1981	1998	40
9000 Midlantic Drive	Mt. Laurel	NJ	—	1,472	5,895	1,785		1,471	7,681	9,152	2,608	1989	1997	40
305 Fellowship Drive	Mt. Laurel	NJ	—	1,421	5,768	1,440		1,421	7,208	8,629	3,050	1980	1998	40
309 Fellowship Drive	Mt. Laurel	NJ	—	1,518	6,154	564		1,518	6,718	8,236	2,472	1982	1998	40
303 Fellowship Drive	Mt. Laurel	NJ	—	1,493	6,055	567		1,493	6,622	8,115	2,441	1979	1998	40
1000 Bishops Gate	Mt. Laurel	NJ	—	934	6,287	427		934	6,714	7,648	1,755	2005	2000	40
161 Gaither Drive	Mt. Laurel	NJ	—	1,016	4,064	818		1,016	4,882	5,898	1,578	1987	2001	40
4000 Midlantic Drive	Mt. Laurel	NJ	—	714	5,085	(1,403	)	714	3,682	4,396	1,810	1998	1997	40
815 East Gate Drive	Mt. Laurel	NJ	—	636	2,584	253		636	2,837	3,473	1,092	1986	1998	40
817 East Gate Drive	Mt. Laurel	NJ	—	611	2,426	360		612	2,785	3,397	1,096	1986	1998	40
400 Commerce Drive	Newark	DE	—	2,528	9,220	1,180		2,528	10,400	12,928	3,000	1997	2002	40
200 Commerce Drive	Newark	DE	—	911	4,414	1,018		911	5,432	6,343	1,676	1998	2002	40
100 Commerce Drive	Newark	DE	—	1,160	4,633	454		1,159	5,088	6,247	2,116	1989	1997	40

							Gross Amount at Which Carried
				Initial Cost			December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition	Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
Main Street - Plaza 1000	Voorhees	NJ	—	2,732	10,942	3,446	2,732	14,388	17,120	6,143	1988	1997	40
Main Street - Piazza	Voorhees	NJ	—	696	2,802	60	696	2,862	3,558	1,233	1990	1997	40
Main Street - Promenade	Voorhees	NJ	—	531	2,052	363	531	2,415	2,946	916	1988	1997	40
920 North King Street	Wilmington	DE	—	6,141	21,140	1,232	6,142	22,371	28,513	6,432	1989	2004	30
300 Delaware Avenue	Wilmington	DE	—	6,368	13,739	2,942	6,369	16,680	23,049	5,121	1989	2004	23
Two Righter Parkway	Wilmington	DE	—	2,802	11,217	5,255	2,803	16,471	19,274	2,361	1987	2001	40
One Righter Parkway	Wilmington	DE	—	2,545	10,195	4,773	2,546	14,967	17,513	7,070	1989	1996	40
RICHMOND
4364 South Alston Avenue	Durham	NC	—	1,622	6,419	892	1,580	7,353	8,933	2,625	1985	1998	40
4805 Lake Brooke Drive	Glen Allen	VA	—	1,640	6,567	1,373	1,640	7,940	9,580	3,220	1996	1998	40
Overlook II	Glen Allen	VA	—	791	4,503	62	790	4,565	5,355	188	2000	2011	40
Overlook I	Glen Allen	VA	—	791	3,976	93	790	4,069	4,859	181	1998	2011	40
2812 Emerywood Parkway	Henrico	VA	—	1,069	4,281	1,043	1,069	5,324	6,393	2,226	1980	1998	40
300 Arboretum Place	Richmond	VA	—	5,450	21,892	3,528	5,450	25,420	30,870	9,639	1988	1998	40
7501 Boulders View Drive	Richmond	VA	—	4,669	19,699	1,952	4,925	21,395	26,320	2,510	1990	2007	40
7300 Beaufont Springs Drive	Richmond	VA	—	4,672	19,689	670	4,922	20,109	25,031	2,256	2000	2007	40
6800 Paragon Place	Richmond	VA	—	4,552	18,414	1,549	4,552	19,963	24,515	3,110	1986	2006	40
6802 Paragon Place	Richmond	VA	—	2,917	11,454	2,469	2,917	13,923	16,840	3,638	1989	2002	40
1025 Boulders Parkway	Richmond	VA	—	2,574	11,297	1,146	2,825	12,192	15,017	1,364	1994	2007	40
2100-2116 West Laburnam Avenue	Richmond	VA	—	2,482	8,846	3,073	2,482	11,919	14,401	4,497	1976	1998	40
7401 Beaufont Springs Drive	Richmond	VA	—	2,349	10,396	717	2,599	10,863	13,462	1,201	1998	2007	40
7325 Beaufont Springs Drive	Richmond	VA	—	2,344	10,377	502	2,594	10,629	13,223	1,307	1999	2007	40
6806 Paragon Place	Richmond	VA	—	—	10,288	827	403	10,712	11,115	2,573	2007	2005	40
9011 Arboretum Parkway	Richmond	VA	—	1,857	7,702	832	1,856	8,535	10,391	3,333	1991	1998	40
2511 Brittons Hill Road	Richmond	VA	—	1,202	4,820	1,472	1,202	6,292	7,494	2,472	1987	1998	40
9100 Arboretum Parkway	Richmond	VA	—	1,362	5,489	565	1,362	6,054	7,416	2,298	1988	1998	40
100 Gateway Centre Parkway	Richmond	VA	—	391	5,410	885	391	6,295	6,686	1,878	2001	1998	40
9200 Arboretum Parkway	Richmond	VA	—	985	3,973	1,353	984	5,327	6,311	1,819	1988	1998	40
9210 Arboretum Parkway	Richmond	VA	—	1,110	4,474	486	1,110	4,960	6,070	1,839	1988	1998	40
2201-2245 Tomlynn Street	Richmond	VA	—	1,020	4,067	447	1,019	4,515	5,534	1,620	1989	1998	40
9211 Arboretum Parkway	Richmond	VA	—	582	2,433	252	582	2,685	3,267	1,048	1991	1998	40
2212-2224 Tomlynn Street	Richmond	VA	—	502	2,014	353	502	2,367	2,869	779	1985	1998	40
2244 Dabney Road	Richmond	VA	—	550	2,203	37	550	2,240	2,790	837	1993	1998	40
2248 Dabney Road	Richmond	VA	—	512	2,049	223	512	2,272	2,784	854	1989	1998	40
2221-2245 Dabney Road	Richmond	VA	—	530	2,123	80	529	2,204	2,733	804	1994	1998	40
2277 Dabney Road	Richmond	VA	—	507	2,034	61	507	2,095	2,602	751	1986	1998	40
2246 Dabney Road	Richmond	VA	—	455	1,822	18	455	1,840	2,295	682	1987	1998	40

												Gross Amount at Which Carried
					Initial Cost							December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)		Land		Building and Improvements		Net Improvements (Retirements) Since Acquisition			Land		Building and Improvements		Total (b)		Accumulated Depreciation at December 31, 2011 (c)		Year of Construction	Year Acquired	Depreciable Life
2161-2179 Tomlynn Street	Richmond	VA	—		423		1,695		68			423		1,763		2,186		640		1985	1998	40
2251 Dabney Road	Richmond	VA	—		387		1,552		138			387		1,690		2,077		636		1983	1998	40
2256 Dabney Road	Richmond	VA	—		356		1,427		273			356		1,700		2,056		676		1982	1998	40
2130-2146 Tomlynn Street	Richmond	VA	—		353		1,416		213			353		1,629		1,982		681		1988	1998	40
2120 Tomlynn Street	Richmond	VA	—		281		1,125		204			280		1,330		1,610		475		1986	1998	40
2240 Dabney Road	Richmond	VA	—		264		1,059		11			264		1,069		1,333		396		1984	1998	40
Boulders Land	Richmond	VA	—		1,256		—		3			1,259		—		1,259		—		N/A	2007	N/A
CALIFORNIA
5780 & 5790 Fleet Street	Carlsbad	CA	—		7,073		22,907		3,435			7,516		25,899		33,415		3,596		1999	2006	55
5900 & 5950 La Place Court	Carlsbad	CA	—		3,706		11,185		2,090			3,955		13,026		16,981		2,090		1988	2006	48
5963 La Place Court	Carlsbad	CA	—		2,824		9,413		1,662			2,999		10,900		13,899		1,647		1987	2006	55
5973 Avenida Encinas	Carlsbad	CA	—		2,121		8,361		1,383			2,256		9,609		11,865		1,803		1986	2006	45
2035 Corte Del Nogal	Carlsbad	CA	—		3,261		6,077		1,250			3,499		7,089		10,588		1,484		1991	2006	39
1200 Concord Avenue	Concord	CA	—		6,395		24,664		235			6,515		24,778		31,293		4,215		1984	2006	34
1220 Concord Avenue	Concord	CA	—		6,476		24,966		(332		)	6,476		24,634		31,110		3,911		1984	2006	34
155 Grand Avenue	Oakland	CA	—		13,556		54,266		4,482			13,555		58,749		72,304		7,863		1990	2007	40
Two Kaiser Plaza	Oakland	CA	—		7,841		—		—			7,841		—		7,841		—		N/A	2006	N/A
Oakland Lot B	Oakland	CA	—		4,342		—		—			4,342		—		4,342		—		N/A	2006	N/A
16870 W Bernardo Drive	San Diego	CA	—		2,979		15,896		1,766			3,154		17,487		20,641		2,562		2002	2006	56
AUSTIN
1250 Capital of Texas Hwy South	Austin	TX	—		5,152		37,928		5,826			5,247		43,659		48,906		7,063		1984	2006	52
1301 Mopac Expressway	Austin	TX	—		4,188		41,229		(595		)	4,251		40,571		44,822		5,732		2001	2006	55
1221 Mopac Expressway	Austin	TX	—		3,290		31,548		4,228			3,369		35,696		39,065		3,900		2001	2006	55
1601 Mopac Expressway	Austin	TX	—		3,538		34,346		220			3,605		34,499		38,104		4,390		2000	2006	54
1501 South Mopac Expressway	Austin	TX	—		3,698		34,912		(2,202		)	3,767		32,640		36,407		3,889		1999	2006	53
3711 South Mopac Expressway - II	Austin	TX	—		1,688		19,229		4,316			1,688		23,545		25,233		3,660		2007	2006	40
3711 South Mopac Expressway - I	Austin	TX	—		1,688		21,011		2,451			1,688		23,462		25,150		2,262		2007	2006	40
	Total:		$	512,391	$	666,690	$	3,603,754	$	522,640		$	677,891	$	4,115,189	$	4,793,080	$	865,710

\

(a) Excludes the effect of any net interest premium/(discount).

(b) Reconciliation of Real Estate:

The following table reconciles the real estate investments from January 1, 2009 to December 31, 2011 (in thousands):

	2011			2010			2009
Balance at beginning of year	$	4,834,111		$	4,512,618		$	4,608,320
Additions:
Acquisitions	31,454			102,475			—
Capital expenditures	133,550			336,281			80,506
Less:
Dispositions	(206,035		)	(117,263		)	(176,208		)
Balance at end of year	$	4,793,080		$	4,834,111		$	4,512,618

The aggregate cost for federal income tax purposes is $4.5 billion as of December 31, 2011

(c) Reconciliation of Accumulated Depreciation:

The following table reconciles the accumulated depreciation on real estate investments from January 1, 2009 to December 31, 2011 (in thousands):

	2011			2010			2009
Balance at beginning of year	$	776,078		$	716,957		$	639,688
Additions:
Depreciation expense — continuing operations	157,691			133,740			141,309
Depreciation expense — discontinued operations	1,185			1,554			6,494
Less:
Dispositions	(69,244		)	(76,173		)	(70,534		)
Balance at end of year	$	865,710		$	776,078		$	716,957

(d) This property was contributed to an unconsolidated real estate venture, however, the Company will continue to consolidate this property due to its continuing involvement in this property resulting from its ongoing lease at this property and its 50% ownership interest in the venture. Please see Note 3 to the consolidated financial financial statements for additional information.