Schedule III - Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2013

SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]

Real Estate and Accumulated Depreciation Disclosure [Text Block]

								Gross Amount at Which Carried
				Initial Cost				December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013 (c)	Year of Construction	Year Acquired	Depreciable Life
PENNSYLVANIA SUBURBS
400 Berwyn Park	Berwyn	PA	—	2,657	4,462	13,711		2,657	18,172	20,829	5,478	1999	1999	40
300 Berwyn Park	Berwyn	PA	—	2,206	13,422	4,176		2,206	17,598	19,804	8,004	1989	1997	40
1050 Westlakes Drive	Berwyn	PA	—	2,611	10,445	5,046		2,611	15,490	18,101	7,264	1984	1999	40
1200 Swedesford Road	Berwyn	PA	—	2,595	11,809	3,533		2,595	15,341	17,936	5,464	1994	2001	40
200 Berwyn Park	Berwyn	PA	—	1,533	9,460	2,255		1,533	11,714	13,247	5,246	1987	1997	40
1180 Swedesford Road	Berwyn	PA	—	2,086	8,342	2,628		2,086	10,969	13,055	3,113	1987	2001	40
100 Berwyn Park	Berwyn	PA	—	1,180	7,290	2,173		1,180	9,462	10,642	4,241	1986	1997	40
1160 Swedesford Road	Berwyn	PA	—	1,781	7,124	1,412		2,088	8,228	10,316	2,491	1986	2001	40
1100 Cassett Road	Berwyn	PA	—	1,695	6,779	1,267		1,695	8,046	9,741	2,275	1997	2001	40
980 Harvest Drive	Blue Bell	PA	—	3,304	16,960	(110	)	3,303	16,850	20,153	6,542	1988	2002	40
925 Harvest Drive	Blue Bell	PA	—	1,671	6,606	759		1,671	7,364	9,035	3,265	1990	1998	40
920 Harvest Drive	Blue Bell	PA	—	1,209	6,595	(528	)	1,209	6,068	7,277	2,898	1990	1998	40
181 Washington Street	Conshohocken	PA	—	6,927	14,722	634		6,927	15,357	22,284	217	1999	2013	40
426 Lancaster Avenue	Devon	PA	—	1,689	6,756	395		1,689	7,152	8,841	3,259	1990	1998	40
52 Swedesford Square	East Whiteland Twp.	PA	—	4,241	16,579	2,630		4,241	19,209	23,450	7,560	1988	1998	40
One Progress Drive	Horsham	PA	—	1,399	5,629	5,214		1,399	10,843	12,242	3,818	1986	1996	40
500 Enterprise Drive	Horsham	PA	—	1,303	5,188	3,228		1,303	8,416	9,719	3,577	1990	1996	40
640 Freedom Business Center	King Of Prussia	PA	—	4,222	16,891	3,450		4,222	20,341	24,563	8,747	1991	1998	40
555 Croton Road	King of Prussia	PA	—	4,486	17,943	1,330		4,486	19,273	23,759	6,143	1999	2001	40
630 Allendale Road	King of Prussia	PA	—	2,836	4,028	12,223		2,636	16,450	19,086	5,264	2000	2000	40
620 Freedom Business Center	King Of Prussia	PA	—	2,770	11,014	3,755		2,770	14,770	17,540	7,286	1986	1998	40
1000 First Avenue	King Of Prussia	PA	—	2,772	10,936	2,787		2,772	13,723	16,495	5,949	1980	1998	40
1060 First Avenue	King Of Prussia	PA	—	2,712	10,953	2,728		2,712	13,681	16,393	6,016	1987	1998	40
630 Freedom Business Center	King Of Prussia	PA	—	2,773	11,144	1,971		2,773	13,115	15,888	5,856	1989	1998	40
1020 First Avenue	King Of Prussia	PA	—	2,168	8,576	4,522		2,168	13,098	15,266	5,999	1984	1998	40
1040 First Avenue	King Of Prussia	PA	—	2,860	11,282	586		2,860	11,868	14,728	4,859	1985	1998	40
610 Freedom Business Center	King Of Prussia	PA	—	2,017	8,070	2,369		2,017	10,440	12,457	4,388	1985	1998	40
650 Park Avenue	King Of Prussia	PA	—	1,916	4,378	1,771		1,916	6,149	8,065	2,722	1968	1998	40
500 North Gulph Road	King Of Prussia	PA	—	1,303	5,201	1,548		1,303	6,749	8,052	3,151	1979	1996	40
741 First Avenue	King Of Prussia	PA	—	1,287	5,151	11		1,287	5,162	6,449	2,242	1966	1998	40
751-761 Fifth Avenue	King Of Prussia	PA	—	1,097	4,391	31		1,097	4,422	5,519	1,917	1967	1998	40
620 Allendale Road	King Of Prussia	PA	—	1,020	3,839	654		1,020	4,493	5,513	1,869	1961	1998	40
600 Park Avenue	King Of Prussia	PA	—	1,012	4,048	385		1,012	4,433	5,445	1,925	1964	1998	40

								Gross Amount at Which Carried
				Initial Cost				December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013 (c)	Year of Construction	Year Acquired	Depreciable Life
660 Allendale Road	King Of Prussia	PA	—	396	948	2,957		1,085	3,216	4,301	623	2011	1998	40
640 Allendale Road	King of Prussia	PA	—	439	432	1,579		439	2,012	2,451	722	2000	2000	40
101 Lindenwood Drive	Malvern	PA	—	4,152	16,606	3,722		4,152	20,329	24,481	6,569	1988	2001	40
301 Lindenwood Drive	Malvern	PA	—	2,729	10,915	2,667		2,729	13,582	16,311	4,424	1984	2001	40
300 Lindenwood Drive	Malvern	PA	—	848	3,394	1,265		848	4,659	5,507	1,889	1991	2001	40
100 Lindenwood Drive	Malvern	PA	—	473	1,892	208		473	2,100	2,573	729	1985	2001	40
200 Lindenwood Drive	Malvern	PA	—	324	1,295	339		324	1,634	1,958	557	1984	2001	40
14 Campus Boulevard	Newtown Square	PA	—	2,244	4,217	1,515		2,244	5,733	7,977	2,984	1998	1998	40
17 Campus Boulevard	Newtown Square	PA	—	1,108	5,155	(397	)	1,108	4,758	5,866	1,519	2001	1997	40
11 Campus Boulevard	Newtown Square	PA	—	1,112	4,067	672		1,112	4,739	5,851	1,812	1998	1999	40
15 Campus Boulevard	Newtown Square	PA	—	1,164	3,896	228		1,164	4,125	5,289	1,267	2002	2000	40
18 Campus Boulevard	Newtown Square	PA	—	787	3,312	(183	)	787	3,129	3,916	1,525	1990	1996	40
401 Plymouth Road	Plymouth Meeting	PA	—	6,198	16,131	17,096		6,198	33,226	39,424	10,394	2001	2000	40
4000 Chemical Road	Plymouth Meeting	PA	—	4,373	24,546	3,292		4,373	27,838	32,211	5,628	2006	2001	40
610 West Germantown Pike	Plymouth Meeting	PA	—	3,651	14,514	3,299		3,651	17,813	21,464	5,285	1987	2002	40
600 West Germantown Pike	Plymouth Meeting	PA	—	3,652	15,288	2,064		3,652	17,352	21,004	5,119	1986	2002	40
630 West Germantown Pike	Plymouth Meeting	PA	—	3,558	14,743	1,770		3,558	16,513	20,071	5,462	1988	2002	40
620 West Germantown Pike	Plymouth Meeting	PA	—	3,572	14,435	1,607		3,572	16,042	19,614	5,140	1990	2002	40
660 West Germantown Pike(d)	Plymouth Meeting	PA	—	—	—	17,488		—	17,488	17,488	688	1987	2012	30
2240/2250 Butler Pike	Plymouth Meeting	PA	—	1,104	4,627	1,333		1,104	5,960	7,064	3,324	1984	1996	40
2260 Butler Pike	Plymouth Meeting	PA	—	661	2,727	1,242		661	3,969	4,630	2,052	1984	1996	40
120 West Germantown Pike	Plymouth Meeting	PA	—	685	2,773	961		685	3,735	4,420	1,812	1984	1996	40
140 West Germantown Pike	Plymouth Meeting	PA	—	481	1,976	160		481	2,135	2,616	1,017	1984	1996	40
351 Plymouth Road	Plymouth Meeting	PA	—	1,043	555	—		1,043	555	1,598	121	N/A	2000	40
150 Radnor Chester Road	Radnor	PA	—	11,925	36,986	11,799		11,896	48,813	60,709	15,790	1983	2004	29
One Radnor Corporate Center	Radnor	PA	—	7,323	28,613	22,975		7,322	51,588	58,910	15,805	1998	2004	29
201 King of Prussia Road	Radnor	PA	—	8,956	29,811	5,214		8,948	35,032	43,980	13,938	2001	2004	25

555 Lancaster Avenue	Radnor	PA	—	8,014	16,508	18,993	8,609	34,906	43,515	12,970	1973	2004	24
Four Radnor Corporate Center	Radnor	PA	—	5,406	21,390	11,967	5,705	33,058	38,763	12,752	1995	2004	30
Five Radnor Corporate Center	Radnor	PA	—	6,506	25,525	5,124	6,578	30,577	37,155	6,918	1998	2004	38
Three Radnor Corporate Center	Radnor	PA	—	4,773	17,961	2,715	4,791	20,658	25,449	7,226	1998	2004	29
Two Radnor Corporate Center	Radnor	PA	—	3,937	15,484	3,872	3,942	19,350	23,292	6,031	1998	2004	29
130 Radnor Chester Road	Radnor	PA	—	2,573	8,338	3,491	2,567	11,834	14,401	3,825	1983	2004	25
170 Radnor Chester Road	Radnor	PA	—	2,514	8,147	1,678	2,509	9,831	12,340	3,316	1983	2004	25
200 Radnor Chester Road (d)	Radnor	PA	—	—	—	842	—	842	842	—	N/A	2005	N/A

								Gross Amount at Which Carried
				Initial Cost				December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013 (c)	Year of Construction	Year Acquired	Depreciable Life
101 West Elm Street	W. Conshohocken	PA	—	6,251	25,209	2,784		6,251	27,992	34,243	6,556	1999	2005	40
1 West Elm Street	W. Conshohocken	PA	—	3,557	14,249	1,115		3,557	15,364	18,921	3,626	1999	2005	40
595 East Swedesford Road	Wayne	PA	—	2,729	10,917	2,307		2,729	13,225	15,954	3,946	1998	2003	40
575 East Swedesford Road	Wayne	PA	—	2,178	8,712	1,681		2,178	10,393	12,571	3,255	1985	2003	40
565 East Swedesford Road	Wayne	PA	—	1,872	7,489	1,820		1,872	9,309	11,181	2,840	1984	2003	40
585 East Swedesford Road	Wayne	PA	—	1,350	5,401	116		1,350	5,517	6,867	1,397	1998	2003	40
PHILADELPHIA CBD
2970 Market Street	Philadelphia	PA	190,964	22,430	217,763	10,591		22,430	228,354	250,784	21,169	2010	2007	40
2929 Arch Street	Philadelphia	PA	—	—	208,570	29,291		12,482	225,380	237,862	74,828	2005	N/A	40
1717 Arch Street	Philadelphia	PA	—	—	98,188	52,953		25,195	125,946	151,141	12,294	1990	2010	40
2001 Market Street	Philadelphia	PA	112,000	15,323	120,842	(642	)	15,323	120,200	135,523	107	1992	2013	40
130 North 18th Street	Philadelphia	PA	—	14,496	107,736	11,782		14,473	119,541	134,014	37,538	1998	2004	34
100 North 18th Street	Philadelphia	PA	88,583	16,066	100,255	6,038		16,066	106,293	122,359	32,227	1988	2004	36
2005 Market Street	Philadelphia	PA	125,089	15,161	122,486	(17,465	)	15,161	105,021	120,182	94	1987	2013	40
2930 Chestnut Street	Philadelphia	PA	40,101	—	76,008	2,586		—	78,594	78,594	6,606	2010	N/A	40
1900 Market Street	Philadelphia	PA	—	7,768	17,263	64		7,768	17,327	25,095	629	1981	2012	30
3020 Market Street	Philadelphia	PA	—	—	21,417	3,010		—	24,427	24,427	2,144	1959	2011	26
101 - 103 Juniper Street	Philadelphia	PA	—	—	14,401	324		478	14,247	14,725	1,340	2010	2006	40
Philadelphia Marine Center	Philadelphia	PA	—	532	2,196	3,196		628	5,296	5,924	2,186	Various	1998	40
METROPOLITAN WASHINGTON, D.C.
11720 Beltsville Drive	Beltsville	MD	—	3,831	16,661	3,982		3,903	20,571	24,474	5,743	1987	2006	46
11700 Beltsville Drive	Beltsville	MD	—	2,808	12,081	292		2,863	12,319	15,182	2,415	1981	2006	46
11710 Beltsville Drive	Beltsville	MD	—	2,278	11,100	(814	)	2,321	10,243	12,564	2,096	1987	2006	46
6600 Rockledge Drive	Bethesda	MD	—	—	37,421	11,538		—	48,960	48,960	12,867	1981	2006	50
11740 Beltsville Drive	Bethesda	MD	—	198	870	42		202	908	1,110	189	1987	2006	46
12015 Lee Jackson Memorial Highway	Fairfax	VA	—	3,770	22,895	3,665		3,842	26,489	30,331	6,016	1985	2006	42
11781 Lee Jackson Memorial Highway	Fairfax	VA	—	3,246	19,836	24		3,307	19,800	23,107	4,092	1982	2006	40
4401 Fair Lakes Court	Fairfax	VA	—	1,569	11,982	237		1,599	12,190	13,789	2,202	1988	2006	52
3141 Fairview Park Drive (e)	Falls Church	VA	21,630	5,918	40,981	11,545		7,081	51,365	58,446	9,049	1988	2006	51
2340 Dulles Corner Boulevard	Herndon	VA	—	16,345	65,379	18,280		16,129	83,875	100,004	24,559	1987	2006	40
2291 Wood Oak Drive	Herndon	VA	—	8,243	52,413	13,499		8,782	65,373	74,155	11,311	1999	2006	55
196/198 Van Buren Street	Herndon	VA	—	7,931	43,812	8,709		8,348	52,104	60,452	8,594	1991	2006	53
2251 Corporate Park Drive	Herndon	VA	—	11,472	45,893	2,055		11,472	47,948	59,420	8,434	2000	2006	40
2355 Dulles Corner Boulevard	Herndon	VA	—	10,365	43,876	4,528		10,365	48,405	58,770	10,863	1988	2006	40
2411 Dulles Corner Park	Herndon	VA	—	7,279	46,340	3,508		7,417	49,710	57,127	10,475	1990	2006	50
13880 Dulles Corner Lane	Herndon	VA	—	7,236	39,213	2,498		7,373	41,574	48,947	6,634	1997	2006	55

							Gross Amount at Which Carried
				Initial Cost			December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition	Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013 (c)	Year of Construction	Year Acquired	Depreciable Life
2121 Cooperative Way	Herndon	VA	—	5,598	38,639	2,292	5,795	40,734	46,529	6,598	2000	2006	54
2201 Cooperative Way	Herndon	VA	—	4,809	34,093	2,349	4,809	36,442	41,251	5,921	1990	2006	54
13825 Sunrise Valley Drive	Herndon	VA	—	3,794	19,365	1,032	3,866	20,326	24,192	3,521	1989	2006	46
1676 International Drive	Mclean	VA	59,698	18,437	97,538	2,501	18,785	99,691	118,476	17,693	1999	2006	55
8260 Greensboro Drive	Mclean	VA	31,697	7,952	33,964	1,794	8,102	35,608	43,710	6,461	1980	2006	52
1880 Campus Commons Drive	Reston	VA	—	6,164	28,114	6,315	6,281	34,312	40,593	5,754	1985	2006	52
2273 Research Boulevard	Rockville	MD	—	5,167	31,110	3,589	5,237	34,628	39,865	8,658	1999	2006	45
2275 Research Boulevard	Rockville	MD	—	5,059	29,668	2,964	5,154	32,537	37,691	6,474	1990	2006	45
2277 Research Boulevard	Rockville	MD	—	4,649	26,952	695	4,733	27,563	32,296	5,014	1986	2006	45
1900 Gallows Road	Vienna	VA	—	7,797	47,817	9,619	7,944	57,288	65,232	9,483	1989	2006	52
8521 Leesburg Pike	Vienna	VA	—	4,316	30,885	3,198	4,397	34,002	38,399	5,192	1984	2006	51
NEW JERSEY/DELAWARE
457 Haddonfield Road	Cherry Hill	NJ	—	2,142	9,120	1,334	2,142	10,454	12,596	4,884	1990	1996	40
200 Lake Drive East	Cherry Hill	NJ	—	2,069	8,275	1,299	2,069	9,573	11,642	3,264	1989	2001	40
220 Lake Drive East	Cherry Hill	NJ	—	2,144	8,798	646	2,144	9,443	11,587	3,152	1988	2001	40
210 Lake Drive East	Cherry Hill	NJ	—	1,645	6,579	1,110	1,645	7,689	9,334	2,509	1986	2001	40
20 East Clementon Road	Gibbsboro	NJ	—	769	3,055	530	769	3,585	4,354	1,574	1986	1997	40
10 Foster Avenue	Gibbsboro	NJ	—	244	971	78	244	1,049	1,293	470	1983	1997	40
7 Foster Avenue	Gibbsboro	NJ	—	231	921	123	231	1,044	1,275	435	1983	1997	40
50 East Clementon Road	Gibbsboro	NJ	—	114	964	3	114	967	1,081	428	1986	1997	40
2 Foster Avenue	Gibbsboro	NJ	—	185	730	16	185	746	931	333	1974	1997	40
4 Foster Avenue	Gibbsboro	NJ	—	183	726	5	183	732	915	324	1974	1997	40
1 Foster Avenue	Gibbsboro	NJ	—	93	364	76	93	440	533	219	1972	1997	40
5 U.S. Avenue	Gibbsboro	NJ	—	21	81	3	21	84	105	37	1987	1997	40
5 Foster Avenue	Gibbsboro	NJ	—	9	32	26	9	58	67	27	1968	1997	40

1120 Executive Boulevard	Marlton	NJ	—	2,074	8,415	2,061	2,074	10,475	12,549	4,687	1987	1997	40
Two Eves Drive	Marlton	NJ	—	818	3,461	341	818	3,802	4,620	1,795	1987	1997	40
Five Eves Drive	Marlton	NJ	—	703	2,819	532	703	3,351	4,054	1,519	1986	1997	40
Four B Eves Drive	Marlton	NJ	—	588	2,369	420	588	2,789	3,377	1,328	1987	1997	40
Four A Eves Drive	Marlton	NJ	—	539	2,168	123	539	2,291	2,830	1,050	1987	1997	40
308 Harper Drive	Moorestown	NJ	—	1,643	6,663	929	1,643	7,592	9,235	3,155	1976	1998	40
10000 Midlantic Drive	Mt. Laurel	NJ	—	3,206	12,857	4,335	3,206	17,192	20,398	7,087	1990	1997	40
700 East Gate Drive	Mt. Laurel	NJ	—	3,569	14,436	2,094	3,569	16,530	20,099	7,269	1984	1998	40
15000 Midlantic Drive	Mt. Laurel	NJ	—	3,061	12,254	1,600	3,061	13,854	16,915	6,211	1991	1997	40
1000 Howard Boulevard	Mt. Laurel	NJ	—	2,297	9,288	3,922	2,297	13,210	15,507	5,277	1988	1997	40
1000 Atrium Way	Mt. Laurel	NJ	—	2,061	8,180	4,867	2,061	13,047	15,108	5,896	1989	1997	40

								Gross Amount at Which Carried
				Initial Cost				December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013(c)	Year of Construction	Year Acquired	Depreciable Life
2000 Midlantic Drive	Mt. Laurel	NJ	—	2,202	8,823	2,490		2,202	11,313	13,515	4,752	1989	1997	40
701 East Gate Drive	Mt. Laurel	NJ	—	1,736	6,877	1,780		1,736	8,657	10,393	3,452	1986	1998	40
9000 Midlantic Drive	Mt. Laurel	NJ	—	1,472	5,895	1,880		1,472	7,776	9,248	3,142	1989	1997	40
307 Fellowship Drive	Mt. Laurel	NJ	—	1,565	6,342	1,292		1,565	7,634	9,199	3,189	1981	1998	40
305 Fellowship Drive	Mt. Laurel	NJ	—	1,421	5,768	1,611		1,421	7,378	8,799	2,831	1980	1998	40
303 Fellowship Drive	Mt. Laurel	NJ	—	1,493	6,055	851		1,493	6,907	8,400	2,902	1979	1998	40
309 Fellowship Drive	Mt. Laurel	NJ	—	1,518	6,154	644		1,518	6,798	8,316	2,927	1982	1998	40
1000 Bishops Gate	Mt. Laurel	NJ	—	934	6,287	412		934	6,700	7,634	2,350	2005	2000	40
161 Gaither Drive	Mt. Laurel	NJ	—	1,016	4,064	679		1,016	4,743	5,759	1,719	1987	2001	40
815 East Gate Drive	Mt. Laurel	NJ	—	636	2,584	708		636	3,292	3,928	1,353	1986	1998	40
4000 Midlantic Drive	Mt. Laurel	NJ	—	714	5,085	(1,982	)	714	3,103	3,817	1,455	1998	1997	40
817 East Gate Drive	Mt. Laurel	NJ	—	611	2,426	152		611	2,578	3,189	1,088	1986	1998	40
400 Commerce Drive	Newark	DE	—	2,528	9,220	1,048		2,528	10,268	12,796	3,627	1997	2002	40
100 Commerce Drive	Newark	DE	—	1,160	4,633	857		1,160	5,490	6,650	2,381	1989	1997	40
200 Commerce Drive	Newark	DE	—	911	4,414	1,018		911	5,432	6,343	2,012	1998	2002	40
Main Street - Plaza 1000	Voorhees	NJ	—	2,732	10,942	3,074		2,732	14,016	16,748	9,611	1988	1997	40
Main Street - Piazza	Voorhees	NJ	—	696	2,802	2,529		696	5,332	6,028	1,415	1990	1997	40
Main Street - Promenade	Voorhees	NJ	—	531	2,052	445		531	2,496	3,027	1,097	1988	1997	40
920 North King Street	Wilmington	DE	—	6,141	21,140	2,485		6,141	23,625	29,766	6,854	1989	2004	30
300 Delaware Avenue	Wilmington	DE	—	6,368	13,739	2,546		6,368	16,285	22,653	5,836	1989	2004	23
Two Righter Parkway	Wilmington	DE	—	2,802	11,217	6,264		2,802	17,481	20,283	4,069	1987	2001	40
One Righter Parkway	Wilmington	DE	—	2,545	10,195	5,088		2,545	15,282	17,827	7,982	1989	1996	40
RICHMOND
4364 South Alston Avenue	Durham	NC	—	1,622	6,419	1,031		1,580	7,491	9,071	3,010	1985	1998	40
4805 Lake Brooke Drive	Glen Allen	VA	—	1,640	6,567	1,136		1,640	7,703	9,343	2,953	1996	1998	40
Overlook I	Glen Allen	VA	—	748	3,976	600		790	4,533	5,323	439	1998	2011	40
Overlook II	Glen Allen	VA	—	748	4,492	77		790	4,526	5,316	475	2000	2011	40
2812 Emerywood Parkway	Henrico	VA	—	1,069	4,281	505		1,069	4,786	5,855	2,017	1980	1998	40
300 Arboretum Place	Richmond	VA	—	5,450	21,892	3,457		5,450	25,349	30,799	10,047	1988	1998	40
7501 Boulders View Drive	Richmond	VA	—	4,669	19,699	2,112		4,925	21,555	26,480	4,030	1989	2007	40
7300 Beaufont Springs Drive	Richmond	VA	—	4,672	19,689	1,906		4,922	21,345	26,267	3,534	2000	2007	40
6800 Paragon Place	Richmond	VA	—	4,552	18,414	2,020		4,552	20,434	24,986	4,057	1987	2006	40
6802 Paragon Place	Richmond	VA	—	2,917	11,454	2,912		2,917	14,366	17,283	4,666	1989	2002	40
1025 Boulders Parkway	Richmond	VA	—	2,574	11,297	1,573		2,824	12,620	15,444	2,100	1994	2007	40
2100-2116 West Laburnam Avenue	Richmond	VA	—	2,482	8,846	2,707		2,482	11,553	14,035	4,917	1984	1998	40
7401 Beaufont Springs Drive	Richmond	VA	—	2,349	10,396	992		2,599	11,138	13,737	1,904	1998	2007	40
7325 Beaufont Springs Drive	Richmond	VA	—	2,344	10,377	503		2,594	10,629	13,223	1,753	1999	2007	40

								Gross Amount at Which Carried
				Initial Cost				December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013(a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2013 (c)	Year of Construction	Year Acquired	Depreciable Life
9011 Arboretum Parkway	Richmond	VA	—	1,857	7,702	906		1,857	8,609	10,466	3,571	1991	1998	40
6806 Paragon Place	Richmond	VA	—	—	10,288	(105	)	403	9,780	10,183	2,297	2007	2005	40
9100 Arboretum Parkway	Richmond	VA	—	1,362	5,489	761		1,362	6,250	7,612	2,591	1987	1998	40
2511 Brittons Hill Road	Richmond	VA	—	1,202	4,820	1,221		1,202	6,041	7,243	2,652	1987	1998	40
100 Gateway Centre Parkway	Richmond	VA	—	391	5,410	616		391	6,027	6,418	1,725	2001	1998	40
9200 Arboretum Parkway	Richmond	VA	—	985	3,973	1,225		985	5,198	6,183	2,136	1987	1998	40
9210 Arboretum Parkway	Richmond	VA	—	1,110	4,474	527		1,110	5,001	6,111	2,151	1988	1998	40
2201-2245 Tomlynn Street	Richmond	VA	—	1,020	4,067	793		1,020	4,860	5,880	1,944	1989	1998	40
9211 Arboretum Parkway	Richmond	VA	—	582	2,433	886		582	3,320	3,902	1,206	1991	1998	40
2221-2245 Dabney Road	Richmond	VA	—	530	2,123	349		530	2,472	3,002	889	1994	1998	40
2212-2224 Tomlynn Street	Richmond	VA	—	502	2,014	395		502	2,409	2,911	938	1985	1998	40
2244 Dabney Road	Richmond	VA	—	550	2,203	37		550	2,240	2,790	947	1993	1998	40
2277 Dabney Road	Richmond	VA	—	507	2,034	241		507	2,274	2,781	889	1986	1998	40
2248 Dabney Road	Richmond	VA	—	512	2,049	131		512	2,181	2,693	898	1989	1998	40
2161-2179 Tomlynn Street	Richmond	VA	—	423	1,695	315		423	2,010	2,433	764	1985	1998	40
2246 Dabney Road	Richmond	VA	—	455	1,822	18		455	1,840	2,295	770	1987	1998	40
2251 Dabney Road	Richmond	VA	—	387	1,552	110		387	1,662	2,049	703	1983	1998	40
2256 Dabney Road	Richmond	VA	—	356	1,427	235		356	1,662	2,018	746	1982	1998	40
2130-2146 Tomlynn Street	Richmond	VA	—	353	1,416	169		353	1,585	1,938	636	1988	1998	40
2120 Tomlynn Street	Richmond	VA	—	281	1,125	179		281	1,304	1,585	560	1984	1998	40
2240 Dabney Road	Richmond	VA	—	264	1,059	98		264	1,157	1,421	451	1984	1998	40
Boulders Land	Richmond	VA	—	1,256	—	28		1,259	25	1,284	—	N/A	2007	N/A

											Gross Amount at Which Carried
					Initial Cost						December 31, 2013
Property Name	City	State	Encumberances at December 31, 2013 (a)		Land		Building and Improvements		Net Improvements (Retirements) Since Acquisition		Land		Building and Improvements		Total (b)		Accumulated Depreciation at December 31, 2013 (c)		Year of Construction	Year Acquired	Depreciable Life
AUSTIN
11305 Four Points Drive	Austin	TX	—		962		35,894		36,856		962		35,894		36,856		—		2008	2013	40
CALIFORNIA
5900 & 5950 La Place Court	Carlsbad	CA	—		3,706		11,185		3,401		3,955		14,337		18,292		3,015		1988	2006	48
5963 La Place Court	Carlsbad	CA	—		2,824		9,413		2,197		2,999		11,435		14,434		2,164		1987	2006	55
2035 Corte Del Nogal	Carlsbad	CA	—		3,261		6,077		1,175		3,499		7,015		10,514		1,902		1991	2006	39
1200 Concord Avenue	Concord	CA	—		6,395		24,664		809		6,515		25,352		31,867		6,693		1984	2006	34
1220 Concord Avenue	Concord	CA	—		6,476		24,966		260		6,476		25,226		31,702		6,375		1984	2006	34
155 Grand Avenue	Oakland	CA	—		13,556		54,267		5,764		13,557		60,031		73,588		11,951		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
	Total:		$	669,762	$	634,189	$	3,454,900	$	617,057	$	680,513	$	3,988,776	$	4,669,289	$	983,808

(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, 2011 to December 31, 2013 (in thousands):

	2013			2012			2011
Balance at beginning of year	$	4,726,169		$	4,793,080		$	4,834,111
Additions:
Acquisitions	347,510			50,579			31,454
Capital expenditures and assets placed into service	109,740			90,619			133,550
Less:
Dispositions	(474,275		)	(168,408		)	(163,971		)
Retirements	(39,855		)	(39,701		)	(42,064		)
Balance at end of year	$	4,669,289		$	4,726,169		$	4,793,080

The aggregate cost for federal income tax purposes is $4.0 billion as of December 31, 2013.

(c) Reconciliation of Accumulated Depreciation:

The following table reconciles the accumulated depreciation on real estate investments from January 1, 2011 to December 31, 2013 (in thousands):

	2013			2012			2011
Balance at beginning of year	$	954,665		$	865,710		$	776,078
Additions:
Depreciation expense — continuing operations	150,236			154,095			157,691
Depreciation expense — discontinued operations	9,164			2,143			1,185
Less:
Dispositions	(91,890		)	(28,270		)	(62,022		)
Retirements	$	(38,367	)	$	(39,013	)	$	(7,222	)
Balance at end of year	$	983,808		$	954,665		$	865,710

(d) Total net improvements since acquisition for these development properties do not include amounts allocated to construction-in-progress, as shown within the Company's consolidated balance sheet as of December 31, 2013.

(e) 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 statements for additional information.