SCHEDULE III (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 607,766	[1],[2],[3]
Initial Cost to the Company [Abstract]
Land	311,617	[1],[2],[3]
Buildings and Improvements	869,126	[1],[2],[3]
Costs Capitalized Subsequent to Acquisition	587,289	[1],[2],[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	315,544	[1],[2],[3]
Buildings and Improvements	1,452,488	[1],[2],[3]
Total	1,768,032	[1],[2],[3]
Accumulated Depreciation	496,247	[1],[2],[3]
Industrial [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	607,766	[4]
Initial Cost to the Company [Abstract]
Land	241,718	[4]
Buildings and Improvements	869,126	[4]
Costs Capitalized Subsequent to Acquisition	508,933	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	244,199	[4]
Buildings and Improvements	1,375,578	[4]
Total	1,619,777	[4]
Accumulated Depreciation	496,054	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | 56th Street Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	843	[4]
Buildings and Improvements	3,567	[4]
Costs Capitalized Subsequent to Acquisition	3,780	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	843	[4]
Buildings and Improvements	7,347	[4]
Total	8,190	[4]
Accumulated Depreciation	4,669	[4]
Year Acquired	1993	[4]
Year Constructed	1981/86/97	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Jetport Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,575	[4]
Buildings and Improvements	6,591	[4]
Costs Capitalized Subsequent to Acquisition	3,856	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,575	[4]
Buildings and Improvements	10,447	[4]
Total	12,022	[4]
Accumulated Depreciation	6,410	[4]
Year Acquired	1993-99	[4]
Year Constructed	1974-85	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	980	[4]
Buildings and Improvements	3,800	[4]
Costs Capitalized Subsequent to Acquisition	2,413	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	980	[4]
Buildings and Improvements	6,213	[4]
Total	7,193	[4]
Accumulated Depreciation	3,736	[4]
Year Acquired	1994	[4]
Year Constructed	1983/87	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	843	[4]
Buildings and Improvements	3,963	[4]
Costs Capitalized Subsequent to Acquisition	1,158	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	883	[4]
Buildings and Improvements	5,081	[4]
Total	5,964	[4]
Accumulated Depreciation	2,912	[4]
Year Acquired	1997	[4]
Year Constructed	1996	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	407	[4]
Buildings and Improvements	1,503	[4]
Costs Capitalized Subsequent to Acquisition	454	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	407	[4]
Buildings and Improvements	1,957	[4]
Total	2,364	[4]
Accumulated Depreciation	1,368	[4]
Year Acquired	1999	[4]
Year Constructed	1988	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,190	[4]
Buildings and Improvements	4,625	[4]
Costs Capitalized Subsequent to Acquisition	1,658	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,190	[4]
Buildings and Improvements	6,283	[4]
Total	7,473	[4]
Accumulated Depreciation	3,602	[4]
Year Acquired	1997/98	[4]
Year Constructed	1990/97/98	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North I and III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,123	[4],[5]
Initial Cost to the Company [Abstract]
Land	1,005	[4],[5]
Buildings and Improvements	4,688	[4],[5]
Costs Capitalized Subsequent to Acquisition	2,195	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,005	[4],[5]
Buildings and Improvements	6,883	[4],[5]
Total	7,888	[4],[5]
Accumulated Depreciation	3,274	[4],[5]
Year Acquired	1998	[4],[5]
Year Constructed	2000	[4],[5]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,701	[4],[5]
Initial Cost to the Company [Abstract]
Land	634	[4],[5]
Buildings and Improvements	4,418	[4],[5]
Costs Capitalized Subsequent to Acquisition	381	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	634	[4],[5]
Buildings and Improvements	4,799	[4],[5]
Total	5,433	[4],[5]
Accumulated Depreciation	2,669	[4],[5]
Year Acquired	1997/98	[4],[5]
Year Constructed	1999	[4],[5]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	655	[4]
Buildings and Improvements	3,187	[4]
Costs Capitalized Subsequent to Acquisition	555	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	655	[4]
Buildings and Improvements	3,742	[4]
Total	4,397	[4]
Accumulated Depreciation	1,311	[4]
Year Acquired	2000	[4]
Year Constructed	2005	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	655	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,294	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	655	[4]
Buildings and Improvements	4,294	[4]
Total	4,949	[4]
Accumulated Depreciation	1,638	[4]
Year Acquired	2000	[4]
Year Constructed	2006	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	337	[4]
Buildings and Improvements	3,318	[4]
Costs Capitalized Subsequent to Acquisition	446	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	337	[4]
Buildings and Improvements	3,764	[4]
Total	4,101	[4]
Accumulated Depreciation	1,616	[4]
Year Acquired	1997/98	[4]
Year Constructed	2001	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	465	[4]
Buildings and Improvements	3,738	[4]
Costs Capitalized Subsequent to Acquisition	932	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	465	[4]
Buildings and Improvements	4,670	[4]
Total	5,135	[4]
Accumulated Depreciation	2,120	[4]
Year Acquired	1998	[4]
Year Constructed	1998	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,109	[4]
Buildings and Improvements	6,126	[4]
Costs Capitalized Subsequent to Acquisition	1,028	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,109	[4]
Buildings and Improvements	7,154	[4]
Total	8,263	[4]
Accumulated Depreciation	2,686	[4]
Year Acquired	1998	[4]
Year Constructed	1998	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	647	[4]
Buildings and Improvements	3,603	[4]
Costs Capitalized Subsequent to Acquisition	991	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	647	[4]
Buildings and Improvements	4,594	[4]
Total	5,241	[4]
Accumulated Depreciation	1,603	[4]
Year Acquired	2003	[4]
Year Constructed	2001	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	439	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	3,167	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	556	[4]
Buildings and Improvements	3,050	[4]
Total	3,606	[4]
Accumulated Depreciation	783	[4]
Year Acquired	2005	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	805	[4]
Buildings and Improvements	6,472	[4]
Costs Capitalized Subsequent to Acquisition	235	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	805	[4]
Buildings and Improvements	6,707	[4]
Total	7,512	[4]
Accumulated Depreciation	1,671	[4]
Year Acquired	2005	[4]
Year Constructed	2001	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	724	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	5,683	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	916	[4]
Buildings and Improvements	5,491	[4]
Total	6,407	[4]
Accumulated Depreciation	1,420	[4]
Year Acquired	2005	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	642	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	5,032	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	812	[4]
Buildings and Improvements	4,862	[4]
Total	5,674	[4]
Accumulated Depreciation	845	[4]
Year Acquired	2005	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	618	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,916	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	781	[4]
Buildings and Improvements	4,753	[4]
Total	5,534	[4]
Accumulated Depreciation	506	[4]
Year Acquired	2005	[4]
Year Constructed	2009	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center A [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	185	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	1,428	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	185	[4]
Buildings and Improvements	1,428	[4]
Total	1,613	[4]
Accumulated Depreciation	214	[4]
Year Acquired	2005	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	227	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	1,485	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	227	[4]
Buildings and Improvements	1,485	[4]
Total	1,712	[4]
Accumulated Depreciation	220	[4]
Year Acquired	2005	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Airport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,257	[4]
Buildings and Improvements	4,012	[4]
Costs Capitalized Subsequent to Acquisition	824	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,257	[4]
Buildings and Improvements	4,836	[4]
Total	6,093	[4]
Accumulated Depreciation	2,082	[4]
Year Acquired	1998	[4]
Year Constructed	1998	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westlake Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,527	[4],[5]
Initial Cost to the Company [Abstract]
Land	1,333	[4],[5]
Buildings and Improvements	6,998	[4],[5]
Costs Capitalized Subsequent to Acquisition	1,561	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,333	[4],[5]
Buildings and Improvements	8,559	[4],[5]
Total	9,892	[4],[5]
Accumulated Depreciation	4,059	[4],[5]
Year Acquired	1998	[4],[5]
Year Constructed	1998/99	[4],[5]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	915	[4]
Buildings and Improvements	5,346	[4]
Costs Capitalized Subsequent to Acquisition	1,020	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	915	[4]
Buildings and Improvements	6,366	[4]
Total	7,281	[4]
Accumulated Depreciation	2,278	[4]
Year Acquired	2002	[4]
Year Constructed	2004	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,013	[4]
Buildings and Improvements	3,247	[4]
Costs Capitalized Subsequent to Acquisition	341	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,013	[4]
Buildings and Improvements	3,588	[4]
Total	4,601	[4]
Accumulated Depreciation	1,425	[4]
Year Acquired	2003	[4]
Year Constructed	2001	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Silo Bend Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	4,131	[4]
Buildings and Improvements	27,497	[4]
Costs Capitalized Subsequent to Acquisition	117	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,131	[4]
Buildings and Improvements	27,614	[4]
Total	31,745	[4]
Accumulated Depreciation	1,227	[4]
Year Acquired	2011	[4]
Year Constructed	1987/90	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa East Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,097	[4]
Buildings and Improvements	5,750	[4]
Costs Capitalized Subsequent to Acquisition	15	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,097	[4]
Buildings and Improvements	5,765	[4]
Total	6,862	[4]
Accumulated Depreciation	403	[4]
Year Acquired	2011	[4]
Year Constructed	1984/90	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa West Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,499	[4]
Buildings and Improvements	9,472	[4]
Costs Capitalized Subsequent to Acquisition	831	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,499	[4]
Buildings and Improvements	10,303	[4]
Total	12,802	[4]
Accumulated Depreciation	492	[4]
Year Acquired	2011	[4]
Year Constructed	1975/85/90/93/94	[4]
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Madison Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	495	[4]
Buildings and Improvements	2,779	[4]
Costs Capitalized Subsequent to Acquisition	254	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	495	[4]
Buildings and Improvements	3,033	[4]
Total	3,528	[4]
Accumulated Depreciation	129	[4]
Year Acquired	2012	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Chancellor Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	291	[4]
Buildings and Improvements	1,711	[4]
Costs Capitalized Subsequent to Acquisition	174	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	291	[4]
Buildings and Improvements	1,885	[4]
Total	2,176	[4]
Accumulated Depreciation	958	[4]
Year Acquired	1996/97	[4]
Year Constructed	1996/97	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	603	[4]
Buildings and Improvements	2,414	[4]
Costs Capitalized Subsequent to Acquisition	2,016	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	603	[4]
Buildings and Improvements	4,430	[4]
Total	5,033	[4]
Accumulated Depreciation	2,712	[4]
Year Acquired	1994	[4]
Year Constructed	1975	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	300	[4]
Buildings and Improvements	945	[4]
Costs Capitalized Subsequent to Acquisition	227	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	300	[4]
Buildings and Improvements	1,172	[4]
Total	1,472	[4]
Accumulated Depreciation	499	[4]
Year Acquired	2002	[4]
Year Constructed	1976	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	320	[4]
Buildings and Improvements	997	[4]
Costs Capitalized Subsequent to Acquisition	370	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	320	[4]
Buildings and Improvements	1,367	[4]
Total	1,687	[4]
Accumulated Depreciation	594	[4]
Year Acquired	2002	[4]
Year Constructed	1980	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunbelt Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,461	[4],[6]
Initial Cost to the Company [Abstract]
Land	1,474	[4],[6]
Buildings and Improvements	5,745	[4],[6]
Costs Capitalized Subsequent to Acquisition	5,156	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,474	[4],[6]
Buildings and Improvements	10,901	[4],[6]
Total	12,375	[4],[6]
Accumulated Depreciation	6,566	[4],[6]
Year Acquired	1989/97/98	[4],[6]
Year Constructed	1974/87/97/98	[4],[6]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	497	[4]
Buildings and Improvements	2,444	[4]
Costs Capitalized Subsequent to Acquisition	727	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	497	[4]
Buildings and Improvements	3,171	[4]
Total	3,668	[4]
Accumulated Depreciation	1,478	[4]
Year Acquired	1997/98	[4]
Year Constructed	1997/98	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	512	[4]
Buildings and Improvements	3,613	[4]
Costs Capitalized Subsequent to Acquisition	191	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	512	[4]
Buildings and Improvements	3,804	[4]
Total	4,316	[4]
Accumulated Depreciation	2,080	[4]
Year Acquired	1998	[4]
Year Constructed	1999	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,518	[4]
Buildings and Improvements	2,661	[4]
Costs Capitalized Subsequent to Acquisition	2,004	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,518	[4]
Buildings and Improvements	4,665	[4]
Total	6,183	[4]
Accumulated Depreciation	2,883	[4]
Year Acquired	1999	[4]
Year Constructed	1980/82	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	745	[4]
Buildings and Improvements	2,618	[4]
Costs Capitalized Subsequent to Acquisition	1,079	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	745	[4]
Buildings and Improvements	3,697	[4]
Total	4,442	[4]
Accumulated Depreciation	1,462	[4]
Year Acquired	2003	[4]
Year Constructed	1975	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	555	[4]
Buildings and Improvements	1,977	[4]
Costs Capitalized Subsequent to Acquisition	642	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	555	[4]
Buildings and Improvements	2,619	[4]
Total	3,174	[4]
Accumulated Depreciation	1,171	[4]
Year Acquired	1999	[4]
Year Constructed	1999	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	597	[4]
Buildings and Improvements	3,271	[4]
Costs Capitalized Subsequent to Acquisition	1,354	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	597	[4]
Buildings and Improvements	4,625	[4]
Total	5,222	[4]
Accumulated Depreciation	2,839	[4]
Year Acquired	1999	[4]
Year Constructed	2001	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	642	[4]
Buildings and Improvements	3,121	[4]
Costs Capitalized Subsequent to Acquisition	495	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	642	[4]
Buildings and Improvements	3,616	[4]
Total	4,258	[4]
Accumulated Depreciation	1,609	[4]
Year Acquired	1999	[4]
Year Constructed	2002	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	642	[4]
Buildings and Improvements	2,917	[4]
Costs Capitalized Subsequent to Acquisition	956	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	642	[4]
Buildings and Improvements	3,873	[4]
Total	4,515	[4]
Accumulated Depreciation	1,405	[4]
Year Acquired	1999	[4]
Year Constructed	2004	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	750	[4]
Buildings and Improvements	2,509	[4]
Costs Capitalized Subsequent to Acquisition	1,900	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	750	[4]
Buildings and Improvements	4,409	[4]
Total	5,159	[4]
Accumulated Depreciation	2,203	[4]
Year Acquired	1999	[4]
Year Constructed	2005	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	672	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	3,353	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	672	[4]
Buildings and Improvements	3,353	[4]
Total	4,025	[4]
Accumulated Depreciation	911	[4]
Year Acquired	1999	[4]
Year Constructed	2006	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	373	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,470	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	373	[4]
Buildings and Improvements	4,470	[4]
Total	4,843	[4]
Accumulated Depreciation	2,163	[4]
Year Acquired	2003	[4]
Year Constructed	2006	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	342	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,297	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	342	[4]
Buildings and Improvements	4,297	[4]
Total	4,639	[4]
Accumulated Depreciation	1,611	[4]
Year Acquired	2003	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	547	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	5,297	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	547	[4]
Buildings and Improvements	5,297	[4]
Total	5,844	[4]
Accumulated Depreciation	1,185	[4]
Year Acquired	2003	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,684	[4],[7]
Initial Cost to the Company [Abstract]
Land	506	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	4,505	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	506	[4],[7]
Buildings and Improvements	4,505	[4],[7]
Total	5,011	[4],[7]
Accumulated Depreciation	1,166	[4],[7]
Year Acquired	2003	[4],[7]
Year Constructed	2006	[4],[7]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,425	[4],[7]
Initial Cost to the Company [Abstract]
Land	382	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	4,277	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	382	[4],[7]
Buildings and Improvements	4,277	[4],[7]
Total	4,659	[4],[7]
Accumulated Depreciation	1,458	[4],[7]
Year Acquired	2003	[4],[7]
Year Constructed	2006	[4],[7]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	571	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,937	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	571	[4]
Buildings and Improvements	4,937	[4]
Total	5,508	[4]
Accumulated Depreciation	1,004	[4]
Year Acquired	2003	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	520	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	6,165	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	520	[4]
Buildings and Improvements	6,165	[4]
Total	6,685	[4]
Accumulated Depreciation	1,343	[4]
Year Acquired	2003	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VIII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	531	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	6,253	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	531	[4]
Buildings and Improvements	6,253	[4]
Total	6,784	[4]
Accumulated Depreciation	919	[4]
Year Acquired	2003	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park XII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	12,899	[4],[8]
Initial Cost to the Company [Abstract]
Land	2,025	[4],[8]
Buildings and Improvements	0	[4],[8]
Costs Capitalized Subsequent to Acquisition	16,838	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,025	[4],[8]
Buildings and Improvements	16,838	[4],[8]
Total	18,863	[4],[8]
Accumulated Depreciation	2,274	[4],[8]
Year Acquired	2005	[4],[8]
Year Constructed	2008	[4],[8]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Deerwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,147	[4]
Buildings and Improvements	1,799	[4]
Costs Capitalized Subsequent to Acquisition	1,625	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,147	[4]
Buildings and Improvements	3,424	[4]
Total	4,571	[4]
Accumulated Depreciation	1,922	[4]
Year Acquired	1989	[4]
Year Constructed	1978	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Phillips Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,375	[4]
Buildings and Improvements	2,961	[4]
Costs Capitalized Subsequent to Acquisition	3,926	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,375	[4]
Buildings and Improvements	6,887	[4]
Total	8,262	[4]
Accumulated Depreciation	4,115	[4]
Year Acquired	1994	[4]
Year Constructed	1984/95	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Lake Pointe Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,689	[4],[9]
Initial Cost to the Company [Abstract]
Land	3,442	[4],[9]
Buildings and Improvements	6,450	[4],[9]
Costs Capitalized Subsequent to Acquisition	6,530	[4],[9]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,442	[4],[9]
Buildings and Improvements	12,980	[4],[9]
Total	16,422	[4],[9]
Accumulated Depreciation	8,147	[4],[9]
Year Acquired	1993	[4],[9]
Year Constructed	1986/87	[4],[9]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Ellis Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	540	[4]
Buildings and Improvements	7,513	[4]
Costs Capitalized Subsequent to Acquisition	965	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	540	[4]
Buildings and Improvements	8,478	[4]
Total	9,018	[4]
Accumulated Depreciation	3,543	[4]
Year Acquired	1997	[4]
Year Constructed	1977	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Westside Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,170	[4]
Buildings and Improvements	12,400	[4]
Costs Capitalized Subsequent to Acquisition	4,370	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,170	[4]
Buildings and Improvements	16,770	[4]
Total	17,940	[4]
Accumulated Depreciation	8,098	[4]
Year Acquired	1997	[4]
Year Constructed	1984	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | 12th Street Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	841	[4]
Buildings and Improvements	2,974	[4]
Costs Capitalized Subsequent to Acquisition	1,375	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	841	[4]
Buildings and Improvements	4,349	[4]
Total	5,190	[4]
Accumulated Depreciation	696	[4]
Year Acquired	2008	[4]
Year Constructed	1985	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Beach Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	476	[4]
Buildings and Improvements	1,899	[4]
Costs Capitalized Subsequent to Acquisition	613	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	476	[4]
Buildings and Improvements	2,512	[4]
Total	2,988	[4]
Accumulated Depreciation	1,057	[4]
Year Acquired	2000	[4]
Year Constructed	2000	[4]
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Interstate Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,879	[4]
Buildings and Improvements	5,700	[4]
Costs Capitalized Subsequent to Acquisition	1,242	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,879	[4]
Buildings and Improvements	6,942	[4]
Total	8,821	[4]
Accumulated Depreciation	2,606	[4]
Year Acquired	2005	[4]
Year Constructed	1990	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Linpro Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	613	[4]
Buildings and Improvements	2,243	[4]
Costs Capitalized Subsequent to Acquisition	1,551	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	616	[4]
Buildings and Improvements	3,791	[4]
Total	4,407	[4]
Accumulated Depreciation	2,566	[4]
Year Acquired	1996	[4]
Year Constructed	1986	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Cypress Creek Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	0	[4]
Buildings and Improvements	2,465	[4]
Costs Capitalized Subsequent to Acquisition	1,579	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[4]
Buildings and Improvements	4,044	[4]
Total	4,044	[4]
Accumulated Depreciation	2,278	[4]
Year Acquired	1997	[4]
Year Constructed	1986	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Lockhart Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	0	[4]
Buildings and Improvements	3,489	[4]
Costs Capitalized Subsequent to Acquisition	2,280	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[4]
Buildings and Improvements	5,769	[4]
Total	5,769	[4]
Accumulated Depreciation	3,166	[4]
Year Acquired	1997	[4]
Year Constructed	1986	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Interstate Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	485	[4]
Buildings and Improvements	2,652	[4]
Costs Capitalized Subsequent to Acquisition	683	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	485	[4]
Buildings and Improvements	3,335	[4]
Total	3,820	[4]
Accumulated Depreciation	1,814	[4]
Year Acquired	1998	[4]
Year Constructed	1988	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Executive Airport Commerce Ctr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,237	[10],[4]
Initial Cost to the Company [Abstract]
Land	1,991	[10],[4]
Buildings and Improvements	4,857	[10],[4]
Costs Capitalized Subsequent to Acquisition	5,087	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,991	[10],[4]
Buildings and Improvements	9,944	[10],[4]
Total	11,935	[10],[4]
Accumulated Depreciation	3,347	[10],[4]
Year Acquired	2001	[10],[4]
Year Constructed	2004/06	[10],[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Sample 95 Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,202	[4]
Buildings and Improvements	8,785	[4]
Costs Capitalized Subsequent to Acquisition	2,654	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,202	[4]
Buildings and Improvements	11,439	[4]
Total	13,641	[4]
Accumulated Depreciation	5,968	[4]
Year Acquired	1996/98	[4]
Year Constructed	1990/99	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	975	[4]
Buildings and Improvements	3,626	[4]
Costs Capitalized Subsequent to Acquisition	1,658	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	975	[4]
Buildings and Improvements	5,284	[4]
Total	6,259	[4]
Accumulated Depreciation	2,760	[4]
Year Acquired	1999	[4]
Year Constructed	1986	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,161	[4]
Initial Cost to the Company [Abstract]
Land	1,385	[4]
Buildings and Improvements	4,222	[4]
Costs Capitalized Subsequent to Acquisition	809	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,385	[4]
Buildings and Improvements	5,031	[4]
Total	6,416	[4]
Accumulated Depreciation	1,850	[4]
Year Acquired	2004	[4]
Year Constructed	1988	[4]
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center III
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	450	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	2,663	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	450	[4]
Buildings and Improvements	2,663	[4]
Total	3,113	[4]
Accumulated Depreciation	335	[4]
Year Acquired	2004	[4]
Year Constructed	2009	[4]
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	911	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,751	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	928	[4]
Buildings and Improvements	4,734	[4]
Total	5,662	[4]
Accumulated Depreciation	1,049	[4]
Year Acquired	2005	[4]
Year Constructed	2008	[4]
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	911	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,737	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	928	[4]
Buildings and Improvements	4,720	[4]
Total	5,648	[4]
Accumulated Depreciation	1,238	[4]
Year Acquired	2005	[4]
Year Constructed	2007	[4]
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,720	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	6,371	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,763	[4]
Buildings and Improvements	6,328	[4]
Total	8,091	[4]
Accumulated Depreciation	827	[4]
Year Acquired	2006	[4]
Year Constructed	2008	[4]
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Wiegman Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,405	[11],[4]
Initial Cost to the Company [Abstract]
Land	2,197	[11],[4]
Buildings and Improvements	8,788	[11],[4]
Costs Capitalized Subsequent to Acquisition	1,772	[11],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,308	[11],[4]
Buildings and Improvements	10,449	[11],[4]
Total	12,757	[11],[4]
Accumulated Depreciation	4,582	[11],[4]
Year Acquired	1996	[11],[4]
Year Constructed	1986/87	[11],[4]
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Wiegman Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,579	[4]
Buildings and Improvements	4,316	[4]
Costs Capitalized Subsequent to Acquisition	2	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,579	[4]
Buildings and Improvements	4,318	[4]
Total	6,897	[4]
Accumulated Depreciation	48	[4]
Year Acquired	2012	[4]
Year Constructed	1998	[4]
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Huntwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,927	[11],[4]
Initial Cost to the Company [Abstract]
Land	3,842	[11],[4]
Buildings and Improvements	15,368	[11],[4]
Costs Capitalized Subsequent to Acquisition	1,918	[11],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,842	[11],[4]
Buildings and Improvements	17,286	[11],[4]
Total	21,128	[11],[4]
Accumulated Depreciation	7,960	[11],[4]
Year Acquired	1996	[11],[4]
Year Constructed	1988	[11],[4]
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | San Clemente Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	893	[4]
Buildings and Improvements	2,004	[4]
Costs Capitalized Subsequent to Acquisition	845	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	893	[4]
Buildings and Improvements	2,849	[4]
Total	3,742	[4]
Accumulated Depreciation	1,195	[4]
Year Acquired	1997	[4]
Year Constructed	1978	[4]
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Yosemite Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	259	[4]
Buildings and Improvements	7,058	[4]
Costs Capitalized Subsequent to Acquisition	1,006	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	259	[4]
Buildings and Improvements	8,064	[4]
Total	8,323	[4]
Accumulated Depreciation	3,599	[4]
Year Acquired	1999	[4]
Year Constructed	1974/87	[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Kingsview Industrial Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,912	[12],[4]
Initial Cost to the Company [Abstract]
Land	643	[12],[4]
Buildings and Improvements	2,573	[12],[4]
Costs Capitalized Subsequent to Acquisition	431	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	643	[12],[4]
Buildings and Improvements	3,004	[12],[4]
Total	3,647	[12],[4]
Accumulated Depreciation	1,468	[12],[4]
Year Acquired	1996	[12],[4]
Year Constructed	1980	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Dominguez Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,946	[12],[4]
Initial Cost to the Company [Abstract]
Land	2,006	[12],[4]
Buildings and Improvements	8,025	[12],[4]
Costs Capitalized Subsequent to Acquisition	1,170	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,006	[12],[4]
Buildings and Improvements	9,195	[12],[4]
Total	11,201	[12],[4]
Accumulated Depreciation	4,520	[12],[4]
Year Acquired	1996	[12],[4]
Year Constructed	1977	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Main Street Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,606	[4]
Buildings and Improvements	4,103	[4]
Costs Capitalized Subsequent to Acquisition	766	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,606	[4]
Buildings and Improvements	4,869	[4]
Total	6,475	[4]
Accumulated Depreciation	2,157	[4]
Year Acquired	1999	[4]
Year Constructed	1999	[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Walnut Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,410	[12],[4]
Initial Cost to the Company [Abstract]
Land	2,885	[12],[4]
Buildings and Improvements	5,274	[12],[4]
Costs Capitalized Subsequent to Acquisition	1,120	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,885	[12],[4]
Buildings and Improvements	6,394	[12],[4]
Total	9,279	[12],[4]
Accumulated Depreciation	2,834	[12],[4]
Year Acquired	1996	[12],[4]
Year Constructed	1966/90	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Washington Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,676	[12],[4]
Initial Cost to the Company [Abstract]
Land	1,636	[12],[4]
Buildings and Improvements	4,900	[12],[4]
Costs Capitalized Subsequent to Acquisition	572	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,636	[12],[4]
Buildings and Improvements	5,472	[12],[4]
Total	7,108	[12],[4]
Accumulated Depreciation	2,396	[12],[4]
Year Acquired	1997	[12],[4]
Year Constructed	1996/97	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chino Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,690	[13],[4]
Initial Cost to the Company [Abstract]
Land	2,544	[13],[4]
Buildings and Improvements	10,175	[13],[4]
Costs Capitalized Subsequent to Acquisition	1,518	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,544	[13],[4]
Buildings and Improvements	11,693	[13],[4]
Total	14,237	[13],[4]
Accumulated Depreciation	5,459	[13],[4]
Year Acquired	1998	[13],[4]
Year Constructed	1980	[13],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	19,340	[12],[4]
Initial Cost to the Company [Abstract]
Land	10,230	[12],[4]
Buildings and Improvements	12,373	[12],[4]
Costs Capitalized Subsequent to Acquisition	1,616	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	10,230	[12],[4]
Buildings and Improvements	13,989	[12],[4]
Total	24,219	[12],[4]
Accumulated Depreciation	6,200	[12],[4]
Year Acquired	1998	[12],[4]
Year Constructed	1959	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,280	[12],[4]
Initial Cost to the Company [Abstract]
Land	0	[12],[4]
Buildings and Improvements	3,012	[12],[4]
Costs Capitalized Subsequent to Acquisition	(157)	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[12],[4]
Buildings and Improvements	2,855	[12],[4]
Total	2,855	[12],[4]
Accumulated Depreciation	2,835	[12],[4]
Year Acquired	2007	[12],[4]
Year Constructed	1992	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chestnut Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,674	[4]
Buildings and Improvements	3,465	[4]
Costs Capitalized Subsequent to Acquisition	165	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,674	[4]
Buildings and Improvements	3,630	[4]
Total	5,304	[4]
Accumulated Depreciation	1,447	[4]
Year Acquired	1998	[4]
Year Constructed	1999	[4]
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Los Angeles Corporate Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,363	[4]
Buildings and Improvements	5,453	[4]
Costs Capitalized Subsequent to Acquisition	2,719	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,363	[4]
Buildings and Improvements	8,172	[4]
Total	9,535	[4]
Accumulated Depreciation	4,176	[4]
Year Acquired	1996	[4]
Year Constructed	1986	[4]
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | University Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	5,517	[4]
Buildings and Improvements	22,067	[4]
Costs Capitalized Subsequent to Acquisition	4,507	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	5,520	[4]
Buildings and Improvements	26,571	[4]
Total	32,091	[4]
Accumulated Depreciation	12,689	[4]
Year Acquired	1996	[4]
Year Constructed	1987/88	[4]
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | Castilian Research Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,719	[4]
Buildings and Improvements	1,410	[4]
Costs Capitalized Subsequent to Acquisition	4,840	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,719	[4]
Buildings and Improvements	6,250	[4]
Total	8,969	[4]
Accumulated Depreciation	959	[4]
Year Acquired	2005	[4]
Year Constructed	2007	[4]
Industrial [Member] | CALIFORNIA [Member] | Fresno [Member] | Shaw Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,488	[12],[4]
Initial Cost to the Company [Abstract]
Land	2,465	[12],[4]
Buildings and Improvements	11,627	[12],[4]
Costs Capitalized Subsequent to Acquisition	4,051	[12],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,465	[12],[4]
Buildings and Improvements	15,678	[12],[4]
Total	18,143	[12],[4]
Accumulated Depreciation	7,898	[12],[4]
Year Acquired	1998	[12],[4]
Year Constructed	1978/81/87	[12],[4]
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Eastlake Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,909	[14],[4]
Initial Cost to the Company [Abstract]
Land	3,046	[14],[4]
Buildings and Improvements	6,888	[14],[4]
Costs Capitalized Subsequent to Acquisition	1,502	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,046	[14],[4]
Buildings and Improvements	8,390	[14],[4]
Total	11,436	[14],[4]
Accumulated Depreciation	4,011	[14],[4]
Year Acquired	1997	[14],[4]
Year Constructed	1989	[14],[4]
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Ocean View Corporate Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,812	[10],[4]
Initial Cost to the Company [Abstract]
Land	6,577	[10],[4]
Buildings and Improvements	7,105	[10],[4]
Costs Capitalized Subsequent to Acquisition	290	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	6,577	[10],[4]
Buildings and Improvements	7,395	[10],[4]
Total	13,972	[10],[4]
Accumulated Depreciation	1,224	[10],[4]
Year Acquired	2010	[10],[4]
Year Constructed	2005	[10],[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,496	[15],[4]
Initial Cost to the Company [Abstract]
Land	1,746	[15],[4]
Buildings and Improvements	4,941	[15],[4]
Costs Capitalized Subsequent to Acquisition	2,210	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,746	[15],[4]
Buildings and Improvements	7,151	[15],[4]
Total	8,897	[15],[4]
Accumulated Depreciation	4,916	[15],[4]
Year Acquired	1988	[15],[4]
Year Constructed	1978	[15],[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,343	[15],[4]
Initial Cost to the Company [Abstract]
Land	519	[15],[4]
Buildings and Improvements	2,008	[15],[4]
Costs Capitalized Subsequent to Acquisition	682	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	519	[15],[4]
Buildings and Improvements	2,690	[15],[4]
Total	3,209	[15],[4]
Accumulated Depreciation	1,400	[15],[4]
Year Acquired	2000	[15],[4]
Year Constructed	1979	[15],[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	416	[4]
Buildings and Improvements	2,481	[4]
Costs Capitalized Subsequent to Acquisition	532	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	416	[4]
Buildings and Improvements	3,013	[4]
Total	3,429	[4]
Accumulated Depreciation	1,007	[4]
Year Acquired	2004	[4]
Year Constructed	2002	[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center V, VI, VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,904	[4],[7]
Initial Cost to the Company [Abstract]
Land	1,824	[4],[7]
Buildings and Improvements	4,106	[4],[7]
Costs Capitalized Subsequent to Acquisition	740	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,824	[4],[7]
Buildings and Improvements	4,846	[4],[7]
Total	6,670	[4],[7]
Accumulated Depreciation	1,430	[4],[7]
Year Acquired	2009	[4],[7]
Year Constructed	1979/80/81	[4],[7]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Venture Warehouses [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,233	[15],[4]
Initial Cost to the Company [Abstract]
Land	1,452	[15],[4]
Buildings and Improvements	3,762	[15],[4]
Costs Capitalized Subsequent to Acquisition	1,954	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,452	[15],[4]
Buildings and Improvements	5,716	[15],[4]
Total	7,168	[15],[4]
Accumulated Depreciation	3,896	[15],[4]
Year Acquired	1988	[15],[4]
Year Constructed	1979	[15],[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Stemmons Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,134	[15],[4]
Initial Cost to the Company [Abstract]
Land	363	[15],[4]
Buildings and Improvements	2,014	[15],[4]
Costs Capitalized Subsequent to Acquisition	546	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	363	[15],[4]
Buildings and Improvements	2,560	[15],[4]
Total	2,923	[15],[4]
Accumulated Depreciation	1,434	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1977	[15],[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Ambassador Row Warehouses [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,156	[4]
Buildings and Improvements	4,625	[4]
Costs Capitalized Subsequent to Acquisition	2,442	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,156	[4]
Buildings and Improvements	7,067	[4]
Total	8,223	[4]
Accumulated Depreciation	3,992	[4]
Year Acquired	1998	[4]
Year Constructed	1958/65	[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	150	[4]
Buildings and Improvements	583	[4]
Costs Capitalized Subsequent to Acquisition	393	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	150	[4]
Buildings and Improvements	976	[4]
Total	1,126	[4]
Accumulated Depreciation	338	[4]
Year Acquired	2002	[4]
Year Constructed	1971	[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	380	[4]
Buildings and Improvements	2,066	[4]
Costs Capitalized Subsequent to Acquisition	5	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	380	[4]
Buildings and Improvements	2,071	[4]
Total	2,451	[4]
Accumulated Depreciation	383	[4]
Year Acquired	2007	[4]
Year Constructed	1974	[4]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Shady Trail Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,910	[4],[5]
Initial Cost to the Company [Abstract]
Land	635	[4],[5]
Buildings and Improvements	3,621	[4],[5]
Costs Capitalized Subsequent to Acquisition	713	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	635	[4],[5]
Buildings and Improvements	4,334	[4],[5]
Total	4,969	[4],[5]
Accumulated Depreciation	1,455	[4],[5]
Year Acquired	2003	[4],[5]
Year Constructed	1998	[4],[5]
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Valwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	4,361	[4]
Buildings and Improvements	34,405	[4]
Costs Capitalized Subsequent to Acquisition	0	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,361	[4]
Buildings and Improvements	34,405	[4]
Total	38,766	[4]
Accumulated Depreciation	74	[4]
Year Acquired	2012	[4]
Year Constructed	1986/87/97/98	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Northwest Point Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,777	[4],[6]
Initial Cost to the Company [Abstract]
Land	1,243	[4],[6]
Buildings and Improvements	5,640	[4],[6]
Costs Capitalized Subsequent to Acquisition	4,183	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,243	[4],[6]
Buildings and Improvements	9,823	[4],[6]
Total	11,066	[4],[6]
Accumulated Depreciation	5,701	[4],[6]
Year Acquired	1994	[4],[6]
Year Constructed	1984/85	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Lockwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,268	[4],[6]
Initial Cost to the Company [Abstract]
Land	749	[4],[6]
Buildings and Improvements	5,444	[4],[6]
Costs Capitalized Subsequent to Acquisition	1,983	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	749	[4],[6]
Buildings and Improvements	7,427	[4],[6]
Total	8,176	[4],[6]
Accumulated Depreciation	3,546	[4],[6]
Year Acquired	1997	[4],[6]
Year Constructed	1968/69	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | West Loop Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,458	[15],[4]
Initial Cost to the Company [Abstract]
Land	905	[15],[4]
Buildings and Improvements	4,383	[15],[4]
Costs Capitalized Subsequent to Acquisition	2,188	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	905	[15],[4]
Buildings and Improvements	6,571	[15],[4]
Total	7,476	[15],[4]
Accumulated Depreciation	3,465	[15],[4]
Year Acquired	1997/2000	[15],[4]
Year Constructed	1980	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 1 and 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,764	[13],[4]
Initial Cost to the Company [Abstract]
Land	660	[13],[4]
Buildings and Improvements	5,893	[13],[4]
Costs Capitalized Subsequent to Acquisition	1,123	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	660	[13],[4]
Buildings and Improvements	7,016	[13],[4]
Total	7,676	[13],[4]
Accumulated Depreciation	3,689	[13],[4]
Year Acquired	1998	[13],[4]
Year Constructed	1996	[13],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 3, 4 and 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,029	[15],[4]
Initial Cost to the Company [Abstract]
Land	1,025	[15],[4]
Buildings and Improvements	6,413	[15],[4]
Costs Capitalized Subsequent to Acquisition	820	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,025	[15],[4]
Buildings and Improvements	7,233	[15],[4]
Total	8,258	[15],[4]
Accumulated Depreciation	3,423	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1998	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 6 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,432	[15],[4]
Initial Cost to the Company [Abstract]
Land	425	[15],[4]
Buildings and Improvements	2,423	[15],[4]
Costs Capitalized Subsequent to Acquisition	483	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	425	[15],[4]
Buildings and Improvements	2,906	[15],[4]
Total	3,331	[15],[4]
Accumulated Depreciation	1,551	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1998	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 7 and 8 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,847	[15],[4]
Initial Cost to the Company [Abstract]
Land	680	[15],[4]
Buildings and Improvements	4,584	[15],[4]
Costs Capitalized Subsequent to Acquisition	4,115	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	680	[15],[4]
Buildings and Improvements	8,699	[15],[4]
Total	9,379	[15],[4]
Accumulated Depreciation	4,006	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1998	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 9 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,830	[15],[4]
Initial Cost to the Company [Abstract]
Land	800	[15],[4]
Buildings and Improvements	4,355	[15],[4]
Costs Capitalized Subsequent to Acquisition	1,460	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	800	[15],[4]
Buildings and Improvements	5,815	[15],[4]
Total	6,615	[15],[4]
Accumulated Depreciation	2,074	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1998	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 10 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,133	[4],[6]
Initial Cost to the Company [Abstract]
Land	933	[4],[6]
Buildings and Improvements	4,779	[4],[6]
Costs Capitalized Subsequent to Acquisition	289	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	933	[4],[6]
Buildings and Improvements	5,068	[4],[6]
Total	6,001	[4],[6]
Accumulated Depreciation	1,806	[4],[6]
Year Acquired	2001	[4],[6]
Year Constructed	1999	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 11 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,892	[4],[6]
Initial Cost to the Company [Abstract]
Land	638	[4],[6]
Buildings and Improvements	3,764	[4],[6]
Costs Capitalized Subsequent to Acquisition	1,137	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	638	[4],[6]
Buildings and Improvements	4,901	[4],[6]
Total	5,539	[4],[6]
Accumulated Depreciation	2,017	[4],[6]
Year Acquired	1999	[4],[6]
Year Constructed	1999	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	340	[4]
Buildings and Improvements	2,419	[4]
Costs Capitalized Subsequent to Acquisition	199	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	340	[4]
Buildings and Improvements	2,618	[4]
Total	2,958	[4]
Accumulated Depreciation	1,307	[4]
Year Acquired	2000	[4]
Year Constructed	2002	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	282	[4]
Buildings and Improvements	2,569	[4]
Costs Capitalized Subsequent to Acquisition	284	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	282	[4]
Buildings and Improvements	2,853	[4]
Total	3,135	[4]
Accumulated Depreciation	1,616	[4]
Year Acquired	2000	[4]
Year Constructed	2002	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,028	[4],[6]
Initial Cost to the Company [Abstract]
Land	722	[4],[6]
Buildings and Improvements	2,629	[4],[6]
Costs Capitalized Subsequent to Acquisition	534	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	722	[4],[6]
Buildings and Improvements	3,163	[4],[6]
Total	3,885	[4],[6]
Accumulated Depreciation	1,384	[4],[6]
Year Acquired	2000	[4],[6]
Year Constructed	2003	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 15 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,493	[14],[4]
Initial Cost to the Company [Abstract]
Land	731	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	5,765	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	731	[14],[4]
Buildings and Improvements	5,765	[14],[4]
Total	6,496	[14],[4]
Accumulated Depreciation	2,305	[14],[4]
Year Acquired	2000	[14],[4]
Year Constructed	2007	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 16 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,424	[16],[4]
Initial Cost to the Company [Abstract]
Land	519	[16],[4]
Buildings and Improvements	4,248	[16],[4]
Costs Capitalized Subsequent to Acquisition	1,112	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	519	[16],[4]
Buildings and Improvements	5,360	[16],[4]
Total	5,879	[16],[4]
Accumulated Depreciation	2,002	[16],[4]
Year Acquired	2000	[16],[4]
Year Constructed	2005	[16],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 17 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,543	[4],[5]
Initial Cost to the Company [Abstract]
Land	373	[4],[5]
Buildings and Improvements	1,945	[4],[5]
Costs Capitalized Subsequent to Acquisition	785	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	373	[4],[5]
Buildings and Improvements	2,730	[4],[5]
Total	3,103	[4],[5]
Accumulated Depreciation	864	[4],[5]
Year Acquired	2000	[4],[5]
Year Constructed	2004	[4],[5]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	323	[4]
Buildings and Improvements	1,512	[4]
Costs Capitalized Subsequent to Acquisition	250	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	323	[4]
Buildings and Improvements	1,762	[4]
Total	2,085	[4]
Accumulated Depreciation	540	[4]
Year Acquired	2005	[4]
Year Constructed	1995	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 19 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,917	[4],[9]
Initial Cost to the Company [Abstract]
Land	373	[4],[9]
Buildings and Improvements	2,256	[4],[9]
Costs Capitalized Subsequent to Acquisition	871	[4],[9]
Gross Amount at which Carried at Close of Period [Abstract]
Land	373	[4],[9]
Buildings and Improvements	3,127	[4],[9]
Total	3,500	[4],[9]
Accumulated Depreciation	1,554	[4],[9]
Year Acquired	2000	[4],[9]
Year Constructed	2004	[4],[9]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 20 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,530	[4],[9]
Initial Cost to the Company [Abstract]
Land	1,008	[4],[9]
Buildings and Improvements	1,948	[4],[9]
Costs Capitalized Subsequent to Acquisition	1,277	[4],[9]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,008	[4],[9]
Buildings and Improvements	3,225	[4],[9]
Total	4,233	[4],[9]
Accumulated Depreciation	1,439	[4],[9]
Year Acquired	2000	[4],[9]
Year Constructed	2004	[4],[9]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 21 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,936	[13],[4]
Initial Cost to the Company [Abstract]
Land	436	[13],[4]
Buildings and Improvements	0	[13],[4]
Costs Capitalized Subsequent to Acquisition	3,474	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	436	[13],[4]
Buildings and Improvements	3,474	[13],[4]
Total	3,910	[13],[4]
Accumulated Depreciation	821	[13],[4]
Year Acquired	2000/03	[13],[4]
Year Constructed	2006	[13],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 22 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,213	[14],[4]
Initial Cost to the Company [Abstract]
Land	436	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	4,210	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	436	[14],[4]
Buildings and Improvements	4,210	[14],[4]
Total	4,646	[14],[4]
Accumulated Depreciation	1,136	[14],[4]
Year Acquired	2000	[14],[4]
Year Constructed	2007	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 23 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,958	[13],[4]
Initial Cost to the Company [Abstract]
Land	910	[13],[4]
Buildings and Improvements	0	[13],[4]
Costs Capitalized Subsequent to Acquisition	7,026	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	910	[13],[4]
Buildings and Improvements	7,026	[13],[4]
Total	7,936	[13],[4]
Accumulated Depreciation	1,617	[13],[4]
Year Acquired	2000	[13],[4]
Year Constructed	2007	[13],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 24 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,275	[4],[8]
Initial Cost to the Company [Abstract]
Land	837	[4],[8]
Buildings and Improvements	0	[4],[8]
Costs Capitalized Subsequent to Acquisition	5,415	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	837	[4],[8]
Buildings and Improvements	5,415	[4],[8]
Total	6,252	[4],[8]
Accumulated Depreciation	1,441	[4],[8]
Year Acquired	2005	[4],[8]
Year Constructed	2008	[4],[8]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 25 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,825	[4],[8]
Initial Cost to the Company [Abstract]
Land	508	[4],[8]
Buildings and Improvements	0	[4],[8]
Costs Capitalized Subsequent to Acquisition	3,623	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	508	[4],[8]
Buildings and Improvements	3,623	[4],[8]
Total	4,131	[4],[8]
Accumulated Depreciation	711	[4],[8]
Year Acquired	2005	[4],[8]
Year Constructed	2008	[4],[8]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 26 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,798	[10],[4]
Initial Cost to the Company [Abstract]
Land	445	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	3,170	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	445	[10],[4]
Buildings and Improvements	3,170	[10],[4]
Total	3,615	[10],[4]
Accumulated Depreciation	593	[10],[4]
Year Acquired	2005	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 27 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,967	[4],[8]
Initial Cost to the Company [Abstract]
Land	837	[4],[8]
Buildings and Improvements	0	[4],[8]
Costs Capitalized Subsequent to Acquisition	4,964	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	837	[4],[8]
Buildings and Improvements	4,964	[4],[8]
Total	5,801	[4],[8]
Accumulated Depreciation	793	[4],[8]
Year Acquired	2005	[4],[8]
Year Constructed	2008	[4],[8]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 28 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,559	[10],[4]
Initial Cost to the Company [Abstract]
Land	550	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	4,049	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	550	[10],[4]
Buildings and Improvements	4,049	[10],[4]
Total	4,599	[10],[4]
Accumulated Depreciation	620	[10],[4]
Year Acquired	2005	[10],[4]
Year Constructed	2009	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 29 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,806	[10],[4]
Initial Cost to the Company [Abstract]
Land	782	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	4,136	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	974	[10],[4]
Buildings and Improvements	3,944	[10],[4]
Total	4,918	[10],[4]
Accumulated Depreciation	588	[10],[4]
Year Acquired	2007	[10],[4]
Year Constructed	2009	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 30 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,145	[10],[4]
Initial Cost to the Company [Abstract]
Land	981	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	5,667	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,222	[10],[4]
Buildings and Improvements	5,426	[10],[4]
Total	6,648	[10],[4]
Accumulated Depreciation	897	[10],[4]
Year Acquired	2007	[10],[4]
Year Constructed	2009	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr31a Member
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	684	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	3,627	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	684	[4]
Buildings and Improvements	3,627	[4]
Total	4,311	[4]
Accumulated Depreciation	263	[4]
Year Acquired	2008	[4]
Year Constructed	2011	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 32 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,797	[4],[7]
Initial Cost to the Company [Abstract]
Land	1,146	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	5,378	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,427	[4],[7]
Buildings and Improvements	5,097	[4],[7]
Total	6,524	[4],[7]
Accumulated Depreciation	200	[4],[7]
Year Acquired	2007	[4],[7]
Year Constructed	2012	[4],[7]
Industrial [Member] | TEXAS [Member] | Houston [Member] | America Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,523	[15],[4]
Initial Cost to the Company [Abstract]
Land	662	[15],[4]
Buildings and Improvements	4,660	[15],[4]
Costs Capitalized Subsequent to Acquisition	872	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	662	[15],[4]
Buildings and Improvements	5,532	[15],[4]
Total	6,194	[15],[4]
Accumulated Depreciation	2,661	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1996	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Central Green Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,451	[15],[4]
Initial Cost to the Company [Abstract]
Land	566	[15],[4]
Buildings and Improvements	4,031	[15],[4]
Costs Capitalized Subsequent to Acquisition	130	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	566	[15],[4]
Buildings and Improvements	4,161	[15],[4]
Total	4,727	[15],[4]
Accumulated Depreciation	1,895	[15],[4]
Year Acquired	1999	[15],[4]
Year Constructed	1998	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Glenmont Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,010	[15],[4]
Initial Cost to the Company [Abstract]
Land	936	[15],[4]
Buildings and Improvements	6,161	[15],[4]
Costs Capitalized Subsequent to Acquisition	2,504	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	936	[15],[4]
Buildings and Improvements	8,665	[15],[4]
Total	9,601	[15],[4]
Accumulated Depreciation	3,928	[15],[4]
Year Acquired	1998	[15],[4]
Year Constructed	1999/2000	[15],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,459	[4],[6]
Initial Cost to the Company [Abstract]
Land	729	[4],[6]
Buildings and Improvements	3,765	[4],[6]
Costs Capitalized Subsequent to Acquisition	2,133	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	729	[4],[6]
Buildings and Improvements	5,898	[4],[6]
Total	6,627	[4],[6]
Accumulated Depreciation	2,570	[4],[6]
Year Acquired	2000	[4],[6]
Year Constructed	2001	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,208	[4],[9]
Initial Cost to the Company [Abstract]
Land	550	[4],[9]
Buildings and Improvements	3,689	[4],[9]
Costs Capitalized Subsequent to Acquisition	809	[4],[9]
Gross Amount at which Carried at Close of Period [Abstract]
Land	550	[4],[9]
Buildings and Improvements	4,498	[4],[9]
Total	5,048	[4],[9]
Accumulated Depreciation	1,571	[4],[9]
Year Acquired	2000	[4],[9]
Year Constructed	2004	[4],[9]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,235	[14],[4]
Initial Cost to the Company [Abstract]
Land	597	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	5,527	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	751	[14],[4]
Buildings and Improvements	5,373	[14],[4]
Total	6,124	[14],[4]
Accumulated Depreciation	1,813	[14],[4]
Year Acquired	1999	[14],[4]
Year Constructed	2006	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,778	[10],[4]
Initial Cost to the Company [Abstract]
Land	535	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	5,639	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	674	[10],[4]
Buildings and Improvements	5,500	[10],[4]
Total	6,174	[10],[4]
Accumulated Depreciation	982	[10],[4]
Year Acquired	1999	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,970	[4],[6]
Initial Cost to the Company [Abstract]
Land	458	[4],[6]
Buildings and Improvements	5,712	[4],[6]
Costs Capitalized Subsequent to Acquisition	1,435	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	458	[4],[6]
Buildings and Improvements	7,147	[4],[6]
Total	7,605	[4],[6]
Accumulated Depreciation	2,949	[4],[6]
Year Acquired	2002	[4],[6]
Year Constructed	2001	[4],[6]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,190	[14],[4]
Initial Cost to the Company [Abstract]
Land	415	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	2,751	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	415	[14],[4]
Buildings and Improvements	2,751	[14],[4]
Total	3,166	[14],[4]
Accumulated Depreciation	805	[14],[4]
Year Acquired	2005	[14],[4]
Year Constructed	2007	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,441	[14],[4]
Initial Cost to the Company [Abstract]
Land	460	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	3,069	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	460	[14],[4]
Buildings and Improvements	3,069	[14],[4]
Total	3,529	[14],[4]
Accumulated Depreciation	945	[14],[4]
Year Acquired	2005	[14],[4]
Year Constructed	2008	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,400	[14],[4]
Initial Cost to the Company [Abstract]
Land	460	[14],[4]
Buildings and Improvements	0	[14],[4]
Costs Capitalized Subsequent to Acquisition	3,010	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	460	[14],[4]
Buildings and Improvements	3,010	[14],[4]
Total	3,470	[14],[4]
Accumulated Depreciation	983	[14],[4]
Year Acquired	2005	[14],[4]
Year Constructed	2008	[14],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,185	[10],[4]
Initial Cost to the Company [Abstract]
Land	701	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	4,706	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	701	[10],[4]
Buildings and Improvements	4,706	[10],[4]
Total	5,407	[10],[4]
Accumulated Depreciation	1,158	[10],[4]
Year Acquired	2005	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,869	[4],[7]
Initial Cost to the Company [Abstract]
Land	618	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	6,004	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	618	[4],[7]
Buildings and Improvements	6,004	[4],[7]
Total	6,622	[4],[7]
Accumulated Depreciation	859	[4],[7]
Year Acquired	2005	[4],[7]
Year Constructed	2008	[4],[7]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,758	[4],[7]
Initial Cost to the Company [Abstract]
Land	765	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	5,706	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	765	[4],[7]
Buildings and Improvements	5,706	[4],[7]
Total	6,471	[4],[7]
Accumulated Depreciation	960	[4],[7]
Year Acquired	2005	[4],[7]
Year Constructed	2009	[4],[7]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VIII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	721	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	4,573	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	721	[4]
Buildings and Improvements	4,573	[4]
Total	5,294	[4]
Accumulated Depreciation	231	[4]
Year Acquired	2005	[4]
Year Constructed	2011	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	418	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	2,104	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	418	[4]
Buildings and Improvements	2,104	[4]
Total	2,522	[4]
Accumulated Depreciation	15	[4]
Year Acquired	2007	[4]
Year Constructed	2012	[4]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Kirby Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,855	[4],[5]
Initial Cost to the Company [Abstract]
Land	530	[4],[5]
Buildings and Improvements	3,153	[4],[5]
Costs Capitalized Subsequent to Acquisition	332	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	530	[4],[5]
Buildings and Improvements	3,485	[4],[5]
Total	4,015	[4],[5]
Accumulated Depreciation	1,078	[4],[5]
Year Acquired	2004	[4],[5]
Year Constructed	1980	[4],[5]
Industrial [Member] | TEXAS [Member] | Houston [Member] | Clay Campbell Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	742	[4]
Buildings and Improvements	2,998	[4]
Costs Capitalized Subsequent to Acquisition	379	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	742	[4]
Buildings and Improvements	3,377	[4]
Total	4,119	[4]
Accumulated Depreciation	1,256	[4]
Year Acquired	2005	[4]
Year Constructed	1982	[4]
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Butterfield Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	0	[4]
Buildings and Improvements	20,725	[4]
Costs Capitalized Subsequent to Acquisition	6,627	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[4]
Buildings and Improvements	27,352	[4]
Total	27,352	[4]
Accumulated Depreciation	14,280	[4]
Year Acquired	1997/2000	[4]
Year Constructed	1987/95	[4]
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Rojas Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,184	[15],[4]
Initial Cost to the Company [Abstract]
Land	900	[15],[4]
Buildings and Improvements	3,659	[15],[4]
Costs Capitalized Subsequent to Acquisition	2,541	[15],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	900	[15],[4]
Buildings and Improvements	6,200	[15],[4]
Total	7,100	[15],[4]
Accumulated Depreciation	4,182	[15],[4]
Year Acquired	1999	[15],[4]
Year Constructed	1986	[15],[4]
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Americas Ten Business Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,808	[4],[5]
Initial Cost to the Company [Abstract]
Land	526	[4],[5]
Buildings and Improvements	2,778	[4],[5]
Costs Capitalized Subsequent to Acquisition	1,157	[4],[5]
Gross Amount at which Carried at Close of Period [Abstract]
Land	526	[4],[5]
Buildings and Improvements	3,935	[4],[5]
Total	4,461	[4],[5]
Accumulated Depreciation	1,809	[4],[5]
Year Acquired	2001	[4],[5]
Year Constructed	2003	[4],[5]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Alamo Downs Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,602	[16],[4]
Initial Cost to the Company [Abstract]
Land	1,342	[16],[4]
Buildings and Improvements	6,338	[16],[4]
Costs Capitalized Subsequent to Acquisition	1,094	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,342	[16],[4]
Buildings and Improvements	7,432	[16],[4]
Total	8,774	[16],[4]
Accumulated Depreciation	3,279	[16],[4]
Year Acquired	2004	[16],[4]
Year Constructed	1986/2002	[16],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	29,364	[16],[4]
Initial Cost to the Company [Abstract]
Land	4,143	[16],[4]
Buildings and Improvements	31,432	[16],[4]
Costs Capitalized Subsequent to Acquisition	3,447	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,143	[16],[4]
Buildings and Improvements	34,879	[16],[4]
Total	39,022	[16],[4]
Accumulated Depreciation	12,508	[16],[4]
Year Acquired	2005	[16],[4]
Year Constructed	1988-2000/06	[16],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,787	[16],[4]
Initial Cost to the Company [Abstract]
Land	423	[16],[4]
Buildings and Improvements	0	[16],[4]
Costs Capitalized Subsequent to Acquisition	3,280	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	423	[16],[4]
Buildings and Improvements	3,280	[16],[4]
Total	3,703	[16],[4]
Accumulated Depreciation	918	[16],[4]
Year Acquired	2005	[16],[4]
Year Constructed	2006	[16],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 16 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,938	[13],[4]
Initial Cost to the Company [Abstract]
Land	427	[13],[4]
Buildings and Improvements	0	[13],[4]
Costs Capitalized Subsequent to Acquisition	3,485	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	427	[13],[4]
Buildings and Improvements	3,485	[13],[4]
Total	3,912	[13],[4]
Accumulated Depreciation	698	[13],[4]
Year Acquired	2005	[13],[4]
Year Constructed	2007	[13],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 17 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,307	[16],[4]
Initial Cost to the Company [Abstract]
Land	616	[16],[4]
Buildings and Improvements	0	[16],[4]
Costs Capitalized Subsequent to Acquisition	3,779	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	616	[16],[4]
Buildings and Improvements	3,779	[16],[4]
Total	4,395	[16],[4]
Accumulated Depreciation	1,351	[16],[4]
Year Acquired	2005	[16],[4]
Year Constructed	2007	[16],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,010	[4],[7]
Initial Cost to the Company [Abstract]
Land	418	[4],[7]
Buildings and Improvements	0	[4],[7]
Costs Capitalized Subsequent to Acquisition	2,316	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	418	[4],[7]
Buildings and Improvements	2,316	[4],[7]
Total	2,734	[4],[7]
Accumulated Depreciation	675	[4],[7]
Year Acquired	2005	[4],[7]
Year Constructed	2008	[4],[7]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 8 expansion [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,162	[16],[4]
Initial Cost to the Company [Abstract]
Land	0	[16],[4]
Buildings and Improvements	0	[16],[4]
Costs Capitalized Subsequent to Acquisition	1,545	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[16],[4]
Buildings and Improvements	1,545	[16],[4]
Total	1,545	[16],[4]
Accumulated Depreciation	72	[16],[4]
Year Acquired	2005	[16],[4]
Year Constructed	2011	[16],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,285	[14],[4]
Initial Cost to the Company [Abstract]
Land	1,494	[14],[4]
Buildings and Improvements	10,804	[14],[4]
Costs Capitalized Subsequent to Acquisition	2,573	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,494	[14],[4]
Buildings and Improvements	13,377	[14],[4]
Total	14,871	[14],[4]
Accumulated Depreciation	4,886	[14],[4]
Year Acquired	2005	[14],[4]
Year Constructed	1998/99	[14],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building A [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,891	[10],[4]
Initial Cost to the Company [Abstract]
Land	412	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	3,323	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	412	[10],[4]
Buildings and Improvements	3,323	[10],[4]
Total	3,735	[10],[4]
Accumulated Depreciation	961	[10],[4]
Year Acquired	2006	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,145	[10],[4]
Initial Cost to the Company [Abstract]
Land	505	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	3,559	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	505	[10],[4]
Buildings and Improvements	3,559	[10],[4]
Total	4,064	[10],[4]
Accumulated Depreciation	777	[10],[4]
Year Acquired	2006	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building C [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,884	[10],[4]
Initial Cost to the Company [Abstract]
Land	546	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	3,180	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	546	[10],[4]
Buildings and Improvements	3,180	[10],[4]
Total	3,726	[10],[4]
Accumulated Depreciation	367	[10],[4]
Year Acquired	2006	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building D [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,465	[10],[4]
Initial Cost to the Company [Abstract]
Land	1,056	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	7,297	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,056	[10],[4]
Buildings and Improvements	7,297	[10],[4]
Total	8,353	[10],[4]
Accumulated Depreciation	1,220	[10],[4]
Year Acquired	2006	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Fairgrounds Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,883	[14],[4]
Initial Cost to the Company [Abstract]
Land	1,644	[14],[4]
Buildings and Improvements	8,209	[14],[4]
Costs Capitalized Subsequent to Acquisition	1,545	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,644	[14],[4]
Buildings and Improvements	9,754	[14],[4]
Total	11,398	[14],[4]
Accumulated Depreciation	2,985	[14],[4]
Year Acquired	2007	[14],[4]
Year Constructed	1985/86	[14],[4]
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Rittiman Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,083	[4]
Buildings and Improvements	6,649	[4]
Costs Capitalized Subsequent to Acquisition	205	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,083	[4]
Buildings and Improvements	6,854	[4]
Total	7,937	[4]
Accumulated Depreciation	244	[4]
Year Acquired	2011	[4]
Year Constructed	2000	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	837	[4]
Buildings and Improvements	3,349	[4]
Costs Capitalized Subsequent to Acquisition	755	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	837	[4]
Buildings and Improvements	4,104	[4]
Total	4,941	[4]
Accumulated Depreciation	2,152	[4]
Year Acquired	1996	[4]
Year Constructed	1971	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	455	[4]
Buildings and Improvements	482	[4]
Costs Capitalized Subsequent to Acquisition	161	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	455	[4]
Buildings and Improvements	643	[4]
Total	1,098	[4]
Accumulated Depreciation	366	[4]
Year Acquired	1999	[4]
Year Constructed	1971	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	775	[4]
Buildings and Improvements	1,742	[4]
Costs Capitalized Subsequent to Acquisition	525	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	775	[4]
Buildings and Improvements	2,267	[4]
Total	3,042	[4]
Accumulated Depreciation	1,031	[4]
Year Acquired	2000	[4]
Year Constructed	1983	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	380	[4]
Buildings and Improvements	1,652	[4]
Costs Capitalized Subsequent to Acquisition	778	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	380	[4]
Buildings and Improvements	2,430	[4]
Total	2,810	[4]
Accumulated Depreciation	1,102	[4]
Year Acquired	2000	[4]
Year Constructed	1986	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	810	[4],[6]
Initial Cost to the Company [Abstract]
Land	353	[4],[6]
Buildings and Improvements	1,090	[4],[6]
Costs Capitalized Subsequent to Acquisition	108	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	353	[4],[6]
Buildings and Improvements	1,198	[4],[6]
Total	1,551	[4],[6]
Accumulated Depreciation	545	[4],[6]
Year Acquired	2002	[4],[6]
Year Constructed	1980	[4],[6]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,230	[13],[4]
Initial Cost to the Company [Abstract]
Land	599	[13],[4]
Buildings and Improvements	1,855	[13],[4]
Costs Capitalized Subsequent to Acquisition	515	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	599	[13],[4]
Buildings and Improvements	2,370	[13],[4]
Total	2,969	[13],[4]
Accumulated Depreciation	1,107	[13],[4]
Year Acquired	2002	[13],[4]
Year Constructed	1979	[13],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	450	[4]
Buildings and Improvements	650	[4]
Costs Capitalized Subsequent to Acquisition	72	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	450	[4]
Buildings and Improvements	722	[4]
Total	1,172	[4]
Accumulated Depreciation	22	[4]
Year Acquired	2011	[4]
Year Constructed	1999	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Kyrene Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	198	[4]
Initial Cost to the Company [Abstract]
Land	850	[4]
Buildings and Improvements	2,044	[4]
Costs Capitalized Subsequent to Acquisition	548	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	850	[4]
Buildings and Improvements	2,592	[4]
Total	3,442	[4]
Accumulated Depreciation	1,347	[4]
Year Acquired	1999	[4]
Year Constructed	1981	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Kyrene Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	640	[4]
Buildings and Improvements	2,409	[4]
Costs Capitalized Subsequent to Acquisition	722	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	640	[4]
Buildings and Improvements	3,131	[4]
Total	3,771	[4]
Accumulated Depreciation	1,586	[4]
Year Acquired	1999	[4]
Year Constructed	2001	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Southpark Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	918	[4]
Buildings and Improvements	2,738	[4]
Costs Capitalized Subsequent to Acquisition	609	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	918	[4]
Buildings and Improvements	3,347	[4]
Total	4,265	[4]
Accumulated Depreciation	1,235	[4]
Year Acquired	2001	[4]
Year Constructed	2000	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Santan 10 Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,831	[16],[4]
Initial Cost to the Company [Abstract]
Land	846	[16],[4]
Buildings and Improvements	2,647	[16],[4]
Costs Capitalized Subsequent to Acquisition	269	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	846	[16],[4]
Buildings and Improvements	2,916	[16],[4]
Total	3,762	[16],[4]
Accumulated Depreciation	1,109	[16],[4]
Year Acquired	2001	[16],[4]
Year Constructed	2005	[16],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Santan 10 Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,638	[13],[4]
Initial Cost to the Company [Abstract]
Land	1,088	[13],[4]
Buildings and Improvements	0	[13],[4]
Costs Capitalized Subsequent to Acquisition	5,089	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,088	[13],[4]
Buildings and Improvements	5,089	[13],[4]
Total	6,177	[13],[4]
Accumulated Depreciation	1,455	[13],[4]
Year Acquired	2004	[13],[4]
Year Constructed	2007	[13],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Metro Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,927	[4]
Buildings and Improvements	7,708	[4]
Costs Capitalized Subsequent to Acquisition	5,488	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,927	[4]
Buildings and Improvements	13,196	[4]
Total	15,123	[4]
Accumulated Depreciation	7,593	[4]
Year Acquired	1996	[4]
Year Constructed	1977/79	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 35th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,676	[4],[6]
Initial Cost to the Company [Abstract]
Land	418	[4],[6]
Buildings and Improvements	2,381	[4],[6]
Costs Capitalized Subsequent to Acquisition	412	[4],[6]
Gross Amount at which Carried at Close of Period [Abstract]
Land	418	[4],[6]
Buildings and Improvements	2,793	[4],[6]
Total	3,211	[4],[6]
Accumulated Depreciation	1,177	[4],[6]
Year Acquired	1997	[4],[6]
Year Constructed	1967	[4],[6]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 51st Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	300	[4]
Buildings and Improvements	2,029	[4]
Costs Capitalized Subsequent to Acquisition	785	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	300	[4]
Buildings and Improvements	2,814	[4]
Total	3,114	[4]
Accumulated Depreciation	1,442	[4]
Year Acquired	1998	[4]
Year Constructed	1987	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | East University Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,059	[13],[4]
Initial Cost to the Company [Abstract]
Land	1,120	[13],[4]
Buildings and Improvements	4,482	[13],[4]
Costs Capitalized Subsequent to Acquisition	1,135	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,120	[13],[4]
Buildings and Improvements	5,617	[13],[4]
Total	6,737	[13],[4]
Accumulated Depreciation	2,736	[13],[4]
Year Acquired	1998	[13],[4]
Year Constructed	1987/89	[13],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | East University Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	444	[4]
Buildings and Improvements	698	[4]
Costs Capitalized Subsequent to Acquisition	99	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	444	[4]
Buildings and Improvements	797	[4]
Total	1,241	[4]
Accumulated Depreciation	96	[4]
Year Acquired	2010	[4]
Year Constructed	1981	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 55th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,032	[13],[4]
Initial Cost to the Company [Abstract]
Land	912	[13],[4]
Buildings and Improvements	3,717	[13],[4]
Costs Capitalized Subsequent to Acquisition	740	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	917	[13],[4]
Buildings and Improvements	4,452	[13],[4]
Total	5,369	[13],[4]
Accumulated Depreciation	2,304	[13],[4]
Year Acquired	1998	[13],[4]
Year Constructed	1987	[13],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	798	[4]
Buildings and Improvements	3,632	[4]
Costs Capitalized Subsequent to Acquisition	1,248	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	798	[4]
Buildings and Improvements	4,880	[4]
Total	5,678	[4]
Accumulated Depreciation	2,079	[4]
Year Acquired	1999	[4]
Year Constructed	1988	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	320	[4]
Buildings and Improvements	2,448	[4]
Costs Capitalized Subsequent to Acquisition	365	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	320	[4]
Buildings and Improvements	2,813	[4]
Total	3,133	[4]
Accumulated Depreciation	1,144	[4]
Year Acquired	1999	[4]
Year Constructed	2000	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	242	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	2,954	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	242	[4]
Buildings and Improvements	2,954	[4]
Total	3,196	[4]
Accumulated Depreciation	590	[4]
Year Acquired	2000	[4]
Year Constructed	2008	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Airport Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,000	[4]
Buildings and Improvements	1,510	[4]
Costs Capitalized Subsequent to Acquisition	818	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,000	[4]
Buildings and Improvements	2,328	[4]
Total	3,328	[4]
Accumulated Depreciation	982	[4]
Year Acquired	2003	[4]
Year Constructed	1971	[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 40th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,209	[10],[4]
Initial Cost to the Company [Abstract]
Land	703	[10],[4]
Buildings and Improvements	0	[10],[4]
Costs Capitalized Subsequent to Acquisition	6,028	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	703	[10],[4]
Buildings and Improvements	6,028	[10],[4]
Total	6,731	[10],[4]
Accumulated Depreciation	1,033	[10],[4]
Year Acquired	2004	[10],[4]
Year Constructed	2008	[10],[4]
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Sky Harbor Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	5,839	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	21,226	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	5,839	[4]
Buildings and Improvements	21,226	[4]
Total	27,065	[4]
Accumulated Depreciation	2,875	[4]
Year Acquired	2006	[4]
Year Constructed	2008	[4]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,121	[4],[9]
Initial Cost to the Company [Abstract]
Land	506	[4],[9]
Buildings and Improvements	3,564	[4],[9]
Costs Capitalized Subsequent to Acquisition	2,073	[4],[9]
Gross Amount at which Carried at Close of Period [Abstract]
Land	693	[4],[9]
Buildings and Improvements	5,450	[4],[9]
Total	6,143	[4],[9]
Accumulated Depreciation	1,858	[4],[9]
Year Acquired	1997/2003	[4],[9]
Year Constructed	1994/2003	[4],[9]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	442	[4]
Buildings and Improvements	3,381	[4]
Costs Capitalized Subsequent to Acquisition	37	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	442	[4]
Buildings and Improvements	3,418	[4]
Total	3,860	[4]
Accumulated Depreciation	726	[4]
Year Acquired	2007	[4]
Year Constructed	2000	[4]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club III and IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,407	[4]
Buildings and Improvements	0	[4]
Costs Capitalized Subsequent to Acquisition	11,090	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,575	[4]
Buildings and Improvements	10,922	[4]
Total	12,497	[4]
Accumulated Depreciation	1,509	[4]
Year Acquired	2007	[4]
Year Constructed	2009	[4]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Airport Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	1,103	[4]
Buildings and Improvements	4,672	[4]
Costs Capitalized Subsequent to Acquisition	1,533	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,103	[4]
Buildings and Improvements	6,205	[4]
Total	7,308	[4]
Accumulated Depreciation	3,028	[4]
Year Acquired	1998	[4]
Year Constructed	1995	[4]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Southpointe Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	0	[4]
Buildings and Improvements	3,982	[4]
Costs Capitalized Subsequent to Acquisition	2,950	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	0	[4]
Buildings and Improvements	6,932	[4]
Total	6,932	[4]
Accumulated Depreciation	3,246	[4]
Year Acquired	1999	[4]
Year Constructed	1989	[4]
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Benan Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	707	[4]
Buildings and Improvements	1,842	[4]
Costs Capitalized Subsequent to Acquisition	603	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	707	[4]
Buildings and Improvements	2,445	[4]
Total	3,152	[4]
Accumulated Depreciation	1,064	[4]
Year Acquired	2005	[4]
Year Constructed	2001	[4]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | NorthPark Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	16,065	[13],[4]
Initial Cost to the Company [Abstract]
Land	2,758	[13],[4]
Buildings and Improvements	15,932	[13],[4]
Costs Capitalized Subsequent to Acquisition	2,706	[13],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,758	[13],[4]
Buildings and Improvements	18,638	[13],[4]
Total	21,396	[13],[4]
Accumulated Depreciation	5,435	[13],[4]
Year Acquired	2006	[13],[4]
Year Constructed	1987-89	[13],[4]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lindbergh Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	470	[4]
Buildings and Improvements	3,401	[4]
Costs Capitalized Subsequent to Acquisition	297	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	470	[4]
Buildings and Improvements	3,698	[4]
Total	4,168	[4]
Accumulated Depreciation	1,042	[4]
Year Acquired	2007	[4]
Year Constructed	2001/03	[4]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,969	[14],[4]
Initial Cost to the Company [Abstract]
Land	765	[14],[4]
Buildings and Improvements	4,303	[14],[4]
Costs Capitalized Subsequent to Acquisition	671	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	765	[14],[4]
Buildings and Improvements	4,974	[14],[4]
Total	5,739	[14],[4]
Accumulated Depreciation	1,254	[14],[4]
Year Acquired	2007	[14],[4]
Year Constructed	1983	[14],[4]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,530	[4],[7]
Initial Cost to the Company [Abstract]
Land	335	[4],[7]
Buildings and Improvements	1,603	[4],[7]
Costs Capitalized Subsequent to Acquisition	143	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	335	[4],[7]
Buildings and Improvements	1,746	[4],[7]
Total	2,081	[4],[7]
Accumulated Depreciation	263	[4],[7]
Year Acquired	2010	[4],[7]
Year Constructed	1987	[4],[7]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,207	[4],[7]
Initial Cost to the Company [Abstract]
Land	558	[4],[7]
Buildings and Improvements	2,225	[4],[7]
Costs Capitalized Subsequent to Acquisition	219	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	558	[4],[7]
Buildings and Improvements	2,444	[4],[7]
Total	3,002	[4],[7]
Accumulated Depreciation	364	[4],[7]
Year Acquired	2010	[4],[7]
Year Constructed	1981	[4],[7]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Nations Ford Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,356	[14],[4]
Initial Cost to the Company [Abstract]
Land	3,924	[14],[4]
Buildings and Improvements	16,171	[14],[4]
Costs Capitalized Subsequent to Acquisition	2,110	[14],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,924	[14],[4]
Buildings and Improvements	18,281	[14],[4]
Total	22,205	[14],[4]
Accumulated Depreciation	5,541	[14],[4]
Year Acquired	2007	[14],[4]
Year Constructed	1989/94	[14],[4]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Airport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,541	[4],[8]
Initial Cost to the Company [Abstract]
Land	1,454	[4],[8]
Buildings and Improvements	10,136	[4],[8]
Costs Capitalized Subsequent to Acquisition	901	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,454	[4],[8]
Buildings and Improvements	11,037	[4],[8]
Total	12,491	[4],[8]
Accumulated Depreciation	2,113	[4],[8]
Year Acquired	2008	[4],[8]
Year Constructed	2001/02	[4],[8]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Interchange Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,345	[4],[8]
Initial Cost to the Company [Abstract]
Land	986	[4],[8]
Buildings and Improvements	7,949	[4],[8]
Costs Capitalized Subsequent to Acquisition	344	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	986	[4],[8]
Buildings and Improvements	8,293	[4],[8]
Total	9,279	[4],[8]
Accumulated Depreciation	1,463	[4],[8]
Year Acquired	2008	[4],[8]
Year Constructed	1989	[4],[8]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,357	[4],[8]
Initial Cost to the Company [Abstract]
Land	1,284	[4],[8]
Buildings and Improvements	13,163	[4],[8]
Costs Capitalized Subsequent to Acquisition	700	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,284	[4],[8]
Buildings and Improvements	13,863	[4],[8]
Total	15,147	[4],[8]
Accumulated Depreciation	2,117	[4],[8]
Year Acquired	2008	[4],[8]
Year Constructed	2006	[4],[8]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,759	[4],[7]
Initial Cost to the Company [Abstract]
Land	3,033	[4],[7]
Buildings and Improvements	11,497	[4],[7]
Costs Capitalized Subsequent to Acquisition	105	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,033	[4],[7]
Buildings and Improvements	11,602	[4],[7]
Total	14,635	[4],[7]
Accumulated Depreciation	517	[4],[7]
Year Acquired	2011	[4],[7]
Year Constructed	2003	[4],[7]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Waterford Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,877	[4],[8]
Initial Cost to the Company [Abstract]
Land	654	[4],[8]
Buildings and Improvements	3,392	[4],[8]
Costs Capitalized Subsequent to Acquisition	162	[4],[8]
Gross Amount at which Carried at Close of Period [Abstract]
Land	654	[4],[8]
Buildings and Improvements	3,554	[4],[8]
Total	4,208	[4],[8]
Accumulated Depreciation	466	[4],[8]
Year Acquired	2008	[4],[8]
Year Constructed	2000	[4],[8]
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lakeview Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,841	[4],[7]
Initial Cost to the Company [Abstract]
Land	1,392	[4],[7]
Buildings and Improvements	5,068	[4],[7]
Costs Capitalized Subsequent to Acquisition	124	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,392	[4],[7]
Buildings and Improvements	5,192	[4],[7]
Total	6,584	[4],[7]
Accumulated Depreciation	315	[4],[7]
Year Acquired	2011	[4],[7]
Year Constructed	1996	[4],[7]
Industrial [Member] | LOUISIANA [Member] | New Orleans [Member] | Elmwood Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,861	[4]
Buildings and Improvements	6,337	[4]
Costs Capitalized Subsequent to Acquisition	3,458	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,861	[4]
Buildings and Improvements	9,795	[4]
Total	12,656	[4]
Accumulated Depreciation	6,187	[4]
Year Acquired	1997	[4]
Year Constructed	1979	[4]
Industrial [Member] | LOUISIANA [Member] | New Orleans [Member] | Riverbend Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	2,592	[4]
Buildings and Improvements	17,623	[4]
Costs Capitalized Subsequent to Acquisition	3,711	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,592	[4]
Buildings and Improvements	21,334	[4]
Total	23,926	[4]
Accumulated Depreciation	10,317	[4]
Year Acquired	1997	[4]
Year Constructed	1984	[4]
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,753	[16],[4]
Initial Cost to the Company [Abstract]
Land	1,023	[16],[4]
Buildings and Improvements	3,861	[16],[4]
Costs Capitalized Subsequent to Acquisition	1,433	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,023	[16],[4]
Buildings and Improvements	5,294	[16],[4]
Total	6,317	[16],[4]
Accumulated Depreciation	3,342	[16],[4]
Year Acquired	1988	[16],[4]
Year Constructed	1987	[16],[4]
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,134	[16],[4]
Initial Cost to the Company [Abstract]
Land	230	[16],[4]
Buildings and Improvements	2,977	[16],[4]
Costs Capitalized Subsequent to Acquisition	958	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	230	[16],[4]
Buildings and Improvements	3,935	[16],[4]
Total	4,165	[16],[4]
Accumulated Depreciation	2,358	[16],[4]
Year Acquired	1996/97	[16],[4]
Year Constructed	1996/97	[16],[4]
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,768	[16],[4]
Initial Cost to the Company [Abstract]
Land	1,098	[16],[4]
Buildings and Improvements	3,884	[16],[4]
Costs Capitalized Subsequent to Acquisition	1,355	[16],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,098	[16],[4]
Buildings and Improvements	5,239	[16],[4]
Total	6,337	[16],[4]
Accumulated Depreciation	2,346	[16],[4]
Year Acquired	1997/98	[16],[4]
Year Constructed	1999	[16],[4]
Industrial [Member] | COLORADO [Member] | Denver [Member] | Concord Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,585	[4],[7]
Initial Cost to the Company [Abstract]
Land	1,051	[4],[7]
Buildings and Improvements	4,773	[4],[7]
Costs Capitalized Subsequent to Acquisition	413	[4],[7]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,051	[4],[7]
Buildings and Improvements	5,186	[4],[7]
Total	6,237	[4],[7]
Accumulated Depreciation	1,322	[4],[7]
Year Acquired	2007	[4],[7]
Year Constructed	2000	[4],[7]
Industrial [Member] | COLORADO [Member] | Denver [Member] | Centennial Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,462	[10],[4]
Initial Cost to the Company [Abstract]
Land	750	[10],[4]
Buildings and Improvements	3,319	[10],[4]
Costs Capitalized Subsequent to Acquisition	1,697	[10],[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	750	[10],[4]
Buildings and Improvements	5,016	[10],[4]
Total	5,766	[10],[4]
Accumulated Depreciation	958	[10],[4]
Year Acquired	2007	[10],[4]
Year Constructed	1990	[10],[4]
Industrial [Member] | NEVADA [Member] | Las Vegas [Member] | Arville Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	4,933	[4]
Buildings and Improvements	5,094	[4]
Costs Capitalized Subsequent to Acquisition	232	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,933	[4]
Buildings and Improvements	5,326	[4]
Total	10,259	[4]
Accumulated Depreciation	1,016	[4]
Year Acquired	2009	[4]
Year Constructed	1997	[4]
Industrial [Member] | MISSISSIPPI [Member] | Jackson area [Member] | Interchange Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	343	[4]
Buildings and Improvements	5,007	[4]
Costs Capitalized Subsequent to Acquisition	2,311	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	343	[4]
Buildings and Improvements	7,318	[4]
Total	7,661	[4]
Accumulated Depreciation	3,948	[4]
Year Acquired	1997	[4]
Year Constructed	1981	[4]
Industrial [Member] | MISSISSIPPI [Member] | Jackson area [Member] | Tower Automotive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	0	[4]
Buildings and Improvements	9,958	[4]
Costs Capitalized Subsequent to Acquisition	1,199	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	17	[4]
Buildings and Improvements	11,140	[4]
Total	11,157	[4]
Accumulated Depreciation	3,447	[4]
Year Acquired	2001	[4]
Year Constructed	2002	[4]
Industrial [Member] | MISSISSIPPI [Member] | Jackson area [Member] | Metro Airport Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	303	[4]
Buildings and Improvements	1,479	[4]
Costs Capitalized Subsequent to Acquisition	968	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	303	[4]
Buildings and Improvements	2,447	[4]
Total	2,750	[4]
Accumulated Depreciation	1,243	[4]
Year Acquired	2001	[4]
Year Constructed	2003	[4]
Industrial [Member] | TENNESSEE [Member] | Memphis [Member] | Air Park Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	250	[4]
Buildings and Improvements	1,916	[4]
Costs Capitalized Subsequent to Acquisition	851	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	250	[4]
Buildings and Improvements	2,767	[4]
Total	3,017	[4]
Accumulated Depreciation	1,444	[4]
Year Acquired	1998	[4]
Year Constructed	1975	[4]
Industrial [Member] | OKLAHOMA [Member] | Oklahoma City [Member] | Northpointe Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial Cost to the Company [Abstract]
Land	777	[4]
Buildings and Improvements	3,113	[4]
Costs Capitalized Subsequent to Acquisition	825	[4]
Gross Amount at which Carried at Close of Period [Abstract]
Land	998	[4]
Buildings and Improvements	3,717	[4]
Total	4,715	[4]
Accumulated Depreciation	1,632	[4]
Year Acquired	1998	[4]
Year Constructed	1996/97	[4]
Industrial Development [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	69,899	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	78,356	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	71,345	[3]
Buildings and Improvements	76,910	[3]
Total	148,255	[3]
Accumulated Depreciation	193	[3]
Industrial Development [Member] | FLORIDA [Member] | Oak Creek land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,946	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,852	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,374	[3]
Buildings and Improvements	2,424	[3]
Total	4,798	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2005	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | Madison land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,189	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	158	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,189	[3]
Buildings and Improvements	158	[3]
Total	1,347	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | Southridge IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	468	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	5,832	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	468	[3]
Buildings and Improvements	5,832	[3]
Total	6,300	[3]
Accumulated Depreciation	149	[3]
Year Acquired	2003	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | Southridge XI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	513	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	4,952	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	513	[3]
Buildings and Improvements	4,952	[3]
Total	5,465	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2003	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | Southridge X [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	414	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,565	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	414	[3]
Buildings and Improvements	1,565	[3]
Total	1,979	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2003	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | Horizon land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	14,072	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	10,549	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	14,157	[3]
Buildings and Improvements	10,464	[3]
Total	24,621	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2008/09	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | FLORIDA [Member] | SunCoast land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	10,926	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	6,720	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	11,105	[3]
Buildings and Improvements	6,541	[3]
Total	17,646	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2006	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | North Stemmons land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	537	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	276	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	537	[3]
Buildings and Improvements	276	[3]
Total	813	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2001	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Valwood land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	404	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	17	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	404	[3]
Buildings and Improvements	17	[3]
Total	421	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr 31B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	546	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,405	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	546	[3]
Buildings and Improvements	2,405	[3]
Total	2,951	[3]
Accumulated Depreciation	6	[3]
Year Acquired	2008	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston 33 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,166	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	7,918	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,166	[3]
Buildings and Improvements	7,918	[3]
Total	9,084	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston 34 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	439	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,236	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	439	[3]
Buildings and Improvements	2,236	[3]
Total	2,675	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2005	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston International Business Ctr 35 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	340	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,773	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	340	[3]
Buildings and Improvements	1,773	[3]
Total	2,113	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2005	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston International Business Ctr 36 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	685	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	753	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	685	[3]
Buildings and Improvements	753	[3]
Total	1,438	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston International Business Ctr 37 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	759	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	915	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	759	[3]
Buildings and Improvements	915	[3]
Total	1,674	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston International Business Ctr 38 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,053	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,164	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,053	[3]
Buildings and Improvements	1,164	[3]
Total	2,217	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,628	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,042	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,628	[3]
Buildings and Improvements	1,042	[3]
Total	2,670	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2000/06	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land-expansion [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	6,410	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	4,404	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	6,410	[3]
Buildings and Improvements	4,404	[3]
Total	10,814	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing X [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	733	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	3,083	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	733	[3]
Buildings and Improvements	3,083	[3]
Total	3,816	[3]
Accumulated Depreciation	28	[3]
Year Acquired	2007	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing XI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	690	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,910	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	690	[3]
Buildings and Improvements	2,910	[3]
Total	3,600	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2007	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Ten West Crossing 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	401	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,341	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	401	[3]
Buildings and Improvements	1,341	[3]
Total	1,742	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Ten West Crossing land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	5,586	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	818	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	5,586	[3]
Buildings and Improvements	818	[3]
Total	6,404	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Lee Road land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	3,068	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,142	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,822	[3]
Buildings and Improvements	1,388	[3]
Total	5,210	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2007	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | West Road land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	3,303	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	32	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,303	[3]
Buildings and Improvements	32	[3]
Total	3,335	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Americas Ten Business Center II and III land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,365	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,079	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,365	[3]
Buildings and Improvements	1,079	[3]
Total	2,444	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2001	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	607	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	2,932	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	607	[3]
Buildings and Improvements	2,932	[3]
Total	3,539	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2008	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	794	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	4,015	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	794	[3]
Buildings and Improvements	4,015	[3]
Total	4,809	[3]
Accumulated Depreciation	10	[3]
Year Acquired	2008	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	2,288	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	1,944	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,288	[3]
Buildings and Improvements	1,944	[3]
Total	4,232	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2007	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	772	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	460	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	772	[3]
Buildings and Improvements	460	[3]
Total	1,232	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2008	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | ARIZONA [Member] | Airport Distribution Center II land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	300	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	117	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	300	[3]
Buildings and Improvements	117	[3]
Total	417	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2000	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | ARIZONA [Member] | Kyrene Land Member
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	3,220	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	666	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,220	[3]
Buildings and Improvements	666	[3]
Total	3,886	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2011	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | ARIZONA [Member] | Chandler Freeways land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	1,525	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	286	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,525	[3]
Buildings and Improvements	286	[3]
Total	1,811	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | NORTH CAROLINA [Member] | Airport Commerce Center III land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	855	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	480	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	855	[3]
Buildings and Improvements	480	[3]
Total	1,335	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2008	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | COLORADO [Member] | Rampart IV land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	590	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	121	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	590	[3]
Buildings and Improvements	121	[3]
Total	711	[3]
Accumulated Depreciation	0	[3]
Year Acquired	2012	[3]
Year Constructed	n/a	[3]
Industrial Development [Member] | MISSISSIPPI [Member] | Metro Airport Commerce Center II land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[3]
Initial Cost to the Company [Abstract]
Land	307	[3]
Buildings and Improvements	0	[3]
Costs Capitalized Subsequent to Acquisition	399	[3]
Gross Amount at which Carried at Close of Period [Abstract]
Land	307	[3]
Buildings and Improvements	399	[3]
Total	706	[3]
Accumulated Depreciation	$ 0	[3]
Year Acquired	2001	[3]
Year Constructed	n/a	[3]

[1] Changes in Real Estate Properties follow: Years Ended December 31,2012 2011 2010(In thousands)Balance at beginning of year $1,662,593 1,521,177 1,468,182Purchases of real estate properties 48,934 80,624 19,897Development of real estate properties55,404 42,148 9,145Improvements to real estate properties18,164 18,686 23,953Carrying amount of investments sold (16,756) — —Write-off of improvements (307) (42) —Balance at end of year (1) $1,768,032 1,662,593 1,521,177(1)Includes 20% noncontrolling interests in Castilian Research Center of $1,794,000 at December 31, 2012 and $1,794,000 at December 31, 2011 and in University Business Center of $6,418,000 and $6,369,000, respectively.Changes in the accumulated depreciation on real estate properties follow: Years Ended December 31,2012 2011 2010(In thousands)Balance at beginning of year $451,805 403,187 354,745Depreciation expense 51,564 48,648 48,442Accumulated depreciation on assets sold (6,819) — —Other (303) (30) —Balance at end of year $496,247 451,805 403,187

[2] The estimated aggregate cost of real estate properties at December 31, 2012 for federal income tax purposes was approximately $1,727,509,000 before estimated accumulated tax depreciation of $314,360,000. The federal income tax return for the year ended December 31, 2012, has not been filed and accordingly, this estimate is based on preliminary data.

[3] The Company transfers development properties to real estate properties the earlier of 80% occupancy or one year after completion of the shell construction.

[4] The Company computes depreciation using the straight-line method over the estimated useful lives of the buildings (generally 40 years) and improvements (generally 3 to 15 years).

[5] EastGroup has a $27,467,000 non-recourse first mortgage loan with an insurance company secured by Americas Ten I, Kirby, Palm River North I, II & III, Shady Trail, Westlake I & II, and World Houston 17.

[6] EastGroup has a $34,474,000 non-recourse first mortgage loan with an insurance company secured by 35th Avenue, Beltway Crossing I, Broadway V, Lockwood, Northwest Point, Sunbelt, Techway Southwest I, and World Houston 10, 11 & 14.

[7] EastGroup has a $52,369,000 non-recourse first mortgage loan with an insurance company secured by Arion 18, Beltway VI & VII, Commerce Park II & III, Concord Distribution Center, Interstate Distribution Center V, VI & VII, Lakeview Business Center, Ridge Creek Distribution Center II, Southridge IV & V and World Houston 32.

[8] EastGroup has a $52,086,000 non-recourse first mortgage loan with an insurance company secured by Airport Commerce Center I & II, Interchange Park, Ridge Creek Distribution Center I, Southridge XII, Waterford Distribution Center, and World Houston 24, 25 & 27.

[9] EastGroup has a $29,465,000 non-recourse first mortgage loan with an insurance company secured by Country Club I, Lake Pointe, Techway Southwest II, and World Houston 19 & 20.

[10] EastGroup has a $69,376,000 non-recourse first mortgage loan with an insurance company secured by 40th Avenue, Beltway V, Centennial Park, Executive Airport, Ocean View, Techway Southwest IV, Wetmore V-VIII, and World Houston 26, 28, 29 & 30.

[11] EastGroup has a $30,332,000 non-recourse first mortgage loan with an insurance company secured by Huntwood and Wiegman.

[12] EastGroup has a $61,052,000 limited recourse first mortgage loan with an insurance company secured by Dominguez, Industry Distribution Center I & III, Kingsview, Shaw, Walnut, and Washington. The loan has a recourse liability of $5 million which will be released based on the secured properties generating certain base rent amounts.

[13] EastGroup has a $60,310,000 non-recourse first mortgage loan with an insurance company secured by Arion 16, Broadway VI, Chino, East University I & II, Northpark I-IV, Santan 10 II, 55th Avenue, and World Houston 1 & 2 and 21 & 23.

[14] EastGroup has a $64,374,000 non-recourse first mortgage loan with an insurance company secured by Beltway II, III & IV, Commerce Park 1, Eastlake, Fairgrounds I-IV, Nations Ford I-IV, Techway Southwest III, Wetmore I-IV, and World Houston 15 & 22.

[15] EastGroup has a $61,970,000 non-recourse first mortgage loan with an insurance company secured by America Plaza, Central Green, Glenmont I & II, Interstate I, II & III, Rojas, Stemmons Circle, Venture, West Loop I & II, and World Houston 3-9.

[16] EastGroup has a $63,132,000 non-recourse first mortgage loan with an insurance company secured by Alamo Downs, Arion 1-15 & 17, Rampart I, II & III, Santan 10, and World Houston 16.