SCHEDULE III (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 Decimal Percent	Dec. 31, 2010	Dec. 31, 2009
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 628,170,000
Initial Cost to the Company [Abstract]
Land	293,062,000
Buildings and Improvements	837,129,000
Costs Capitalized Subsequent to Acquisition	532,402,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	296,989,000
Buildings and Improvements	1,365,604,000
Total	1,662,593,000
Accumulated Depreciation	451,805,000
Estimated aggregate cost of real estate properties for federal income tax purposes	1,618,749,000
Estimated accumulated tax depreciation	284,908,000
Estimated useful life (in years)	40.00
Estimated useful life, minimum (in years)	3.00
Estimated useful live, maximum (in years)	15.00
Occupancy rate (in hundredths)	80.00%
Period after completion of the shell construction (in years)	one
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	1,521,177,000	1,468,182,000	1,402,636,000
Purchase of real estate properties	80,624,000	19,897,000	15,957,000
Development of real estate properties	42,148,000	9,145,000	35,057,000
Improvements to real estate properties	18,686,000	23,953,000	16,212,000
Carrying amount of investments sold	0	0	(1,680,000)
Write-off of improvements	(42,000)	0	0
Balance at end of year	1,662,593,000	1,521,177,000	1,468,182,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	403,187,000	354,745,000	310,351,000
Depreciation expense	48,648,000	48,442,000	45,195,000
Accumulated depreciation on assets sold	0	0	(801,000)
Other	(30,000)	0	0
Balance at end of year	451,805,000	403,187,000	354,745,000
Participating Mortgage Loans [Line Items]
Loan Amount	628,170,000	644,424,000
Butterfield Trail, Glenmont I and II, Interstate I, II and III, Rojas, Stemmons Circle, Venture and West Loop I and II [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	0	36,171,000
America Plaza, Central Green, Glenmont I , II, Interstate I, II, III, Rojas, Stemmons Circle, Venture, West Loop I, II and World Houston 3 9 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	64,014,000	0
America Plaza, Central Green and World Houston 3-9 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	0	22,993,000
Fifty First Avenue, Airport Distribution, Broadway I, III and IV, Chestnut, Interchange Business Park, Main Street, North Stemmons I land, Southpark, Southpointe, and World Houston 12 and 13 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	32,204,000	33,304,000
Thirty Fifth Avenue, Beltway I, Broadway V, Lockwood, Northwest Point, Sunbelt, Techway Southwest I and World Houston 10, 11 and 14 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	35,912,000	37,283,000
Airport Commerce Center I and II, Interchange Park, Ridge Creek Distribution Center, Southridge XII, Waterford Distribution Center and World Houston 24, 25 and 27 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	54,001,000	55,810,000
Americas Ten I, Kirby, Palm River North I, II and III, Shady Trail, Westlake I and II and World Houston 17 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	27,996,000	28,496,000
Beltway II, III and IV, Commerce Park 1, Eastlake, Fairgrounds I-IV, Nations Ford I-IV, Techway Southwest III, Wetmore I-IV and World Houston 15 and 22 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	67,188,000	69,844,000
Country Club I, Lake Pointe, Techway Southwest II and World Houston 19 and 20 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	31,039,000	32,536,000
Huntwood and Wiegman Distribution Centers [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	31,748,000	33,087,000
Alamo Downs, Arion 1-15 and 17, Rampart I, II and III, Santan 10 and World Houston 16 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	65,961,000	68,626,000
Dominguez, Industry I and III, Kingsview, Shaw, Walnut and Washington [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	62,875,000	64,567,000
Recourse liability	5,000,000
Arion 16, Broadway VI, Chino, East University I and II, Northpark I-IV, Santan 10 II, South 55th Avenue and World Houston 1 and 2, 21 and 23 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	63,093,000	65,718,000
Fortieth Avenue, Beltway V, Centennial Park, Executive Airport, Ocean View, Techway Southwest IV, Wetmore V-VIII and World Houston 26, 28, 29 and 30 [Member]
Participating Mortgage Loans [Line Items]
Loan Amount	71,837,000	74,000,000
University Business Center [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Noncontrolling Interests (in hundreths)	20.00%
Noncontrolling Interests	6,369,000	6,342,000
Castilian Research Center [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Noncontrolling Interests (in hundreths)	20.00%
Noncontrolling Interests	1,794,000	1,793,000
Industrial [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	627,748,000
Initial Cost to the Company [Abstract]
Land	233,194,000
Buildings and Improvements	837,129,000
Costs Capitalized Subsequent to Acquisition	480,121,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	235,394,000
Buildings and Improvements	1,315,050,000
Total	1,550,444,000
Accumulated Depreciation	451,755,000
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | 56th Street Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	843,000
Buildings and Improvements	3,567,000
Costs Capitalized Subsequent to Acquisition	3,470,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	843,000
Buildings and Improvements	7,037,000
Total	7,880,000
Accumulated Depreciation	4,354,000
Year Acquired	1993
Year Constructed	1981/86/97
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Jetport Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,575,000
Buildings and Improvements	6,591,000
Costs Capitalized Subsequent to Acquisition	3,704,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,575,000
Buildings and Improvements	10,295,000
Total	11,870,000
Accumulated Depreciation	6,011,000
Year Acquired	1993-99
Year Constructed	1974-85
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	980,000
Buildings and Improvements	3,800,000
Costs Capitalized Subsequent to Acquisition	2,350,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	980,000
Buildings and Improvements	6,150,000
Total	7,130,000
Accumulated Depreciation	3,547,000
Year Acquired	1994
Year Constructed	1983/87
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	843,000
Buildings and Improvements	3,963,000
Costs Capitalized Subsequent to Acquisition	1,157,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	883,000
Buildings and Improvements	5,080,000
Total	5,963,000
Accumulated Depreciation	2,668,000
Year Acquired	1997
Year Constructed	1996
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	407,000
Buildings and Improvements	1,503,000
Costs Capitalized Subsequent to Acquisition	453,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	407,000
Buildings and Improvements	1,956,000
Total	2,363,000
Accumulated Depreciation	1,297,000
Year Acquired	1999
Year Constructed	1988
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,190,000
Buildings and Improvements	4,625,000
Costs Capitalized Subsequent to Acquisition	1,636,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,190,000
Buildings and Improvements	6,261,000
Total	7,451,000
Accumulated Depreciation	3,365,000
Year Acquired	1997/98
Year Constructed	1990/97/98
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North I and III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,222,000
Initial Cost to the Company [Abstract]
Land	1,005,000
Buildings and Improvements	4,688,000
Costs Capitalized Subsequent to Acquisition	2,126,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,005,000
Buildings and Improvements	6,814,000
Total	7,819,000
Accumulated Depreciation	3,029,000
Year Acquired	1998
Year Constructed	2000
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,791,000
Initial Cost to the Company [Abstract]
Land	634,000
Buildings and Improvements	4,418,000
Costs Capitalized Subsequent to Acquisition	347,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	634,000
Buildings and Improvements	4,765,000
Total	5,399,000
Accumulated Depreciation	2,433,000
Year Acquired	1997/98
Year Constructed	1999
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	655,000
Buildings and Improvements	3,187,000
Costs Capitalized Subsequent to Acquisition	510,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	655,000
Buildings and Improvements	3,697,000
Total	4,352,000
Accumulated Depreciation	1,218,000
Year Acquired	2000
Year Constructed	2005
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	655,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,294,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	655,000
Buildings and Improvements	4,294,000
Total	4,949,000
Accumulated Depreciation	1,516,000
Year Acquired	2000
Year Constructed	2006
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	337,000
Buildings and Improvements	3,318,000
Costs Capitalized Subsequent to Acquisition	434,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	337,000
Buildings and Improvements	3,752,000
Total	4,089,000
Accumulated Depreciation	1,511,000
Year Acquired	1997/98
Year Constructed	2001
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	465,000
Buildings and Improvements	3,738,000
Costs Capitalized Subsequent to Acquisition	932,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	465,000
Buildings and Improvements	4,670,000
Total	5,135,000
Accumulated Depreciation	1,983,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,109,000
Buildings and Improvements	6,126,000
Costs Capitalized Subsequent to Acquisition	539,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,109,000
Buildings and Improvements	6,665,000
Total	7,774,000
Accumulated Depreciation	2,483,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	647,000
Buildings and Improvements	3,603,000
Costs Capitalized Subsequent to Acquisition	820,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	647,000
Buildings and Improvements	4,423,000
Total	5,070,000
Accumulated Depreciation	1,438,000
Year Acquired	2003
Year Constructed	2001
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	439,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,167,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	556,000
Buildings and Improvements	3,050,000
Total	3,606,000
Accumulated Depreciation	704,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,506,000
Initial Cost to the Company [Abstract]
Land	805,000
Buildings and Improvements	6,472,000
Costs Capitalized Subsequent to Acquisition	235,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	805,000
Buildings and Improvements	6,707,000
Total	7,512,000
Accumulated Depreciation	1,490,000
Year Acquired	2005
Year Constructed	2001
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	724,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,683,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	916,000
Buildings and Improvements	5,491,000
Total	6,407,000
Accumulated Depreciation	1,127,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	642,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,028,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	812,000
Buildings and Improvements	4,858,000
Total	5,670,000
Accumulated Depreciation	630,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	618,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,912,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	781,000
Buildings and Improvements	4,749,000
Total	5,530,000
Accumulated Depreciation	288,000
Year Acquired	2005
Year Constructed	2009
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center A [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	185,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,428,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	185,000
Buildings and Improvements	1,428,000
Total	1,613,000
Accumulated Depreciation	148,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	227,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,485,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	227,000
Buildings and Improvements	1,485,000
Total	1,712,000
Accumulated Depreciation	163,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Airport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,257,000
Buildings and Improvements	4,012,000
Costs Capitalized Subsequent to Acquisition	817,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,257,000
Buildings and Improvements	4,829,000
Total	6,086,000
Accumulated Depreciation	1,959,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westlake Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,653,000
Initial Cost to the Company [Abstract]
Land	1,333,000
Buildings and Improvements	6,998,000
Costs Capitalized Subsequent to Acquisition	1,314,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,333,000
Buildings and Improvements	8,312,000
Total	9,645,000
Accumulated Depreciation	3,813,000
Year Acquired	1998
Year Constructed	1998/99
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	915,000
Buildings and Improvements	5,346,000
Costs Capitalized Subsequent to Acquisition	981,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	915,000
Buildings and Improvements	6,327,000
Total	7,242,000
Accumulated Depreciation	2,006,000
Year Acquired	2002
Year Constructed	2004
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,013,000
Buildings and Improvements	3,247,000
Costs Capitalized Subsequent to Acquisition	310,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,013,000
Buildings and Improvements	3,557,000
Total	4,570,000
Accumulated Depreciation	1,314,000
Year Acquired	2003
Year Constructed	2001
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Silo Bend Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	4,131,000
Buildings and Improvements	27,497,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,131,000
Buildings and Improvements	27,497,000
Total	31,628,000
Accumulated Depreciation	71,000
Year Acquired	2011
Year Constructed	1987/90
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa East Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,210,000
Buildings and Improvements	5,852,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,210,000
Buildings and Improvements	5,852,000
Total	7,062,000
Accumulated Depreciation	18,000
Year Acquired	2011
Year Constructed	1984/90
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa West Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,572,000
Buildings and Improvements	9,538,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,572,000
Buildings and Improvements	9,538,000
Total	12,110,000
Accumulated Depreciation	21,000
Year Acquired	2011
Year Constructed	1975/85/90/93/94
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Chancellor Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	291,000
Buildings and Improvements	1,711,000
Costs Capitalized Subsequent to Acquisition	172,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	291,000
Buildings and Improvements	1,883,000
Total	2,174,000
Accumulated Depreciation	896,000
Year Acquired	1996/97
Year Constructed	1996/97
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	603,000
Buildings and Improvements	2,414,000
Costs Capitalized Subsequent to Acquisition	1,668,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	603,000
Buildings and Improvements	4,082,000
Total	4,685,000
Accumulated Depreciation	2,564,000
Year Acquired	1994
Year Constructed	1975
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	300,000
Buildings and Improvements	945,000
Costs Capitalized Subsequent to Acquisition	84,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	300,000
Buildings and Improvements	1,029,000
Total	1,329,000
Accumulated Depreciation	472,000
Year Acquired	2002
Year Constructed	1976
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	320,000
Buildings and Improvements	997,000
Costs Capitalized Subsequent to Acquisition	345,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	320,000
Buildings and Improvements	1,342,000
Total	1,662,000
Accumulated Depreciation	511,000
Year Acquired	2002
Year Constructed	1980
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunbelt Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,791,000
Initial Cost to the Company [Abstract]
Land	1,474,000
Buildings and Improvements	5,745,000
Costs Capitalized Subsequent to Acquisition	5,112,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,474,000
Buildings and Improvements	10,857,000
Total	12,331,000
Accumulated Depreciation	6,152,000
Year Acquired	1989/97/98
Year Constructed	1974/87/97/98
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	497,000
Buildings and Improvements	2,444,000
Costs Capitalized Subsequent to Acquisition	681,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	497,000
Buildings and Improvements	3,125,000
Total	3,622,000
Accumulated Depreciation	1,390,000
Year Acquired	1997/98
Year Constructed	1997/98
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	512,000
Buildings and Improvements	3,613,000
Costs Capitalized Subsequent to Acquisition	165,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	512,000
Buildings and Improvements	3,778,000
Total	4,290,000
Accumulated Depreciation	1,950,000
Year Acquired	1998
Year Constructed	1999
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,518,000
Buildings and Improvements	2,661,000
Costs Capitalized Subsequent to Acquisition	1,941,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,518,000
Buildings and Improvements	4,602,000
Total	6,120,000
Accumulated Depreciation	2,598,000
Year Acquired	1999
Year Constructed	1980/82
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	745,000
Buildings and Improvements	2,618,000
Costs Capitalized Subsequent to Acquisition	953,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	745,000
Buildings and Improvements	3,571,000
Total	4,316,000
Accumulated Depreciation	1,309,000
Year Acquired	2003
Year Constructed	1975
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	555,000
Buildings and Improvements	1,977,000
Costs Capitalized Subsequent to Acquisition	612,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	555,000
Buildings and Improvements	2,589,000
Total	3,144,000
Accumulated Depreciation	1,111,000
Year Acquired	1999
Year Constructed	1999
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	597,000
Buildings and Improvements	3,271,000
Costs Capitalized Subsequent to Acquisition	1,334,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	597,000
Buildings and Improvements	4,605,000
Total	5,202,000
Accumulated Depreciation	2,683,000
Year Acquired	1999
Year Constructed	2001
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	642,000
Buildings and Improvements	3,121,000
Costs Capitalized Subsequent to Acquisition	452,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	642,000
Buildings and Improvements	3,573,000
Total	4,215,000
Accumulated Depreciation	1,539,000
Year Acquired	1999
Year Constructed	2002
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	642,000
Buildings and Improvements	2,917,000
Costs Capitalized Subsequent to Acquisition	673,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	642,000
Buildings and Improvements	3,590,000
Total	4,232,000
Accumulated Depreciation	1,261,000
Year Acquired	1999
Year Constructed	2004
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	750,000
Buildings and Improvements	2,509,000
Costs Capitalized Subsequent to Acquisition	1,888,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	750,000
Buildings and Improvements	4,397,000
Total	5,147,000
Accumulated Depreciation	1,950,000
Year Acquired	1999
Year Constructed	2005
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	672,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,344,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	672,000
Buildings and Improvements	3,344,000
Total	4,016,000
Accumulated Depreciation	831,000
Year Acquired	1999
Year Constructed	2006
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	373,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,453,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	373,000
Buildings and Improvements	4,453,000
Total	4,826,000
Accumulated Depreciation	1,891,000
Year Acquired	2003
Year Constructed	2006
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	342,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,284,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	342,000
Buildings and Improvements	4,284,000
Total	4,626,000
Accumulated Depreciation	1,409,000
Year Acquired	2003
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	547,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,278,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	547,000
Buildings and Improvements	5,278,000
Total	5,825,000
Accumulated Depreciation	940,000
Year Acquired	2003
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	506,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,435,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	506,000
Buildings and Improvements	4,435,000
Total	4,941,000
Accumulated Depreciation	1,042,000
Year Acquired	2003
Year Constructed	2006
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	382,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,171,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	382,000
Buildings and Improvements	4,171,000
Total	4,553,000
Accumulated Depreciation	1,281,000
Year Acquired	2003
Year Constructed	2006
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	571,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,772,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	571,000
Buildings and Improvements	4,772,000
Total	5,343,000
Accumulated Depreciation	845,000
Year Acquired	2003
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	520,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,157,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	520,000
Buildings and Improvements	6,157,000
Total	6,677,000
Accumulated Depreciation	1,061,000
Year Acquired	2003
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VIII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	531,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,248,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	531,000
Buildings and Improvements	6,248,000
Total	6,779,000
Accumulated Depreciation	662,000
Year Acquired	2003
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park XII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,476,000
Initial Cost to the Company [Abstract]
Land	2,025,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	16,816,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,025,000
Buildings and Improvements	16,816,000
Total	18,841,000
Accumulated Depreciation	1,797,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Deerwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,147,000
Buildings and Improvements	1,799,000
Costs Capitalized Subsequent to Acquisition	1,479,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,147,000
Buildings and Improvements	3,278,000
Total	4,425,000
Accumulated Depreciation	1,832,000
Year Acquired	1989
Year Constructed	1978
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Phillips Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,375,000
Buildings and Improvements	2,961,000
Costs Capitalized Subsequent to Acquisition	3,725,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,375,000
Buildings and Improvements	6,686,000
Total	8,061,000
Accumulated Depreciation	3,836,000
Year Acquired	1994
Year Constructed	1984/95
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Lake Pointe Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,315,000
Initial Cost to the Company [Abstract]
Land	3,442,000
Buildings and Improvements	6,450,000
Costs Capitalized Subsequent to Acquisition	6,088,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,442,000
Buildings and Improvements	12,538,000
Total	15,980,000
Accumulated Depreciation	7,586,000
Year Acquired	1993
Year Constructed	1986/87
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Ellis Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	540,000
Buildings and Improvements	7,513,000
Costs Capitalized Subsequent to Acquisition	925,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	540,000
Buildings and Improvements	8,438,000
Total	8,978,000
Accumulated Depreciation	3,320,000
Year Acquired	1997
Year Constructed	1977
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Westside Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,170,000
Buildings and Improvements	12,400,000
Costs Capitalized Subsequent to Acquisition	4,191,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,170,000
Buildings and Improvements	16,591,000
Total	17,761,000
Accumulated Depreciation	7,566,000
Year Acquired	1997
Year Constructed	1984
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | 12th Street Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	841,000
Buildings and Improvements	2,974,000
Costs Capitalized Subsequent to Acquisition	1,368,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	841,000
Buildings and Improvements	4,342,000
Total	5,183,000
Accumulated Depreciation	521,000
Year Acquired	2008
Year Constructed	1985
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Beach Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	476,000
Buildings and Improvements	1,899,000
Costs Capitalized Subsequent to Acquisition	602,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	476,000
Buildings and Improvements	2,501,000
Total	2,977,000
Accumulated Depreciation	985,000
Year Acquired	2000
Year Constructed	2000
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Interstate Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,234,000
Initial Cost to the Company [Abstract]
Land	1,879,000
Buildings and Improvements	5,700,000
Costs Capitalized Subsequent to Acquisition	913,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,879,000
Buildings and Improvements	6,613,000
Total	8,492,000
Accumulated Depreciation	2,377,000
Year Acquired	2005
Year Constructed	1990
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Linpro Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	613,000
Buildings and Improvements	2,243,000
Costs Capitalized Subsequent to Acquisition	1,498,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	616,000
Buildings and Improvements	3,738,000
Total	4,354,000
Accumulated Depreciation	2,400,000
Year Acquired	1996
Year Constructed	1986
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Cypress Creek Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	2,465,000
Costs Capitalized Subsequent to Acquisition	1,500,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	3,965,000
Total	3,965,000
Accumulated Depreciation	2,138,000
Year Acquired	1997
Year Constructed	1986
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Lockhart Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	3,489,000
Costs Capitalized Subsequent to Acquisition	2,270,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	5,759,000
Total	5,759,000
Accumulated Depreciation	2,926,000
Year Acquired	1997
Year Constructed	1986
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Interstate Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	485,000
Buildings and Improvements	2,652,000
Costs Capitalized Subsequent to Acquisition	648,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	485,000
Buildings and Improvements	3,300,000
Total	3,785,000
Accumulated Depreciation	1,703,000
Year Acquired	1998
Year Constructed	1988
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Executive Airport Commerce Ctr [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,496,000
Initial Cost to the Company [Abstract]
Land	1,991,000
Buildings and Improvements	4,857,000
Costs Capitalized Subsequent to Acquisition	4,956,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,991,000
Buildings and Improvements	9,813,000
Total	11,804,000
Accumulated Depreciation	3,008,000
Year Acquired	2001
Year Constructed	2004/06
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Sample 95 Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,202,000
Buildings and Improvements	8,785,000
Costs Capitalized Subsequent to Acquisition	2,358,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,202,000
Buildings and Improvements	11,143,000
Total	13,345,000
Accumulated Depreciation	5,593,000
Year Acquired	1996/98
Year Constructed	1990/99
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	975,000
Buildings and Improvements	3,626,000
Costs Capitalized Subsequent to Acquisition	1,629,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	975,000
Buildings and Improvements	5,255,000
Total	6,230,000
Accumulated Depreciation	2,564,000
Year Acquired	1999
Year Constructed	1986
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,288,000
Initial Cost to the Company [Abstract]
Land	1,385,000
Buildings and Improvements	4,222,000
Costs Capitalized Subsequent to Acquisition	809,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,385,000
Buildings and Improvements	5,031,000
Total	6,416,000
Accumulated Depreciation	1,715,000
Year Acquired	2004
Year Constructed	1988
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	450,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,662,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	450,000
Buildings and Improvements	2,662,000
Total	3,112,000
Accumulated Depreciation	186,000
Year Acquired	2004
Year Constructed	2009
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	911,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,660,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	928,000
Buildings and Improvements	4,643,000
Total	5,571,000
Accumulated Depreciation	823,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	911,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,731,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	928,000
Buildings and Improvements	4,714,000
Total	5,642,000
Accumulated Depreciation	1,025,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,720,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,372,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,763,000
Buildings and Improvements	6,329,000
Total	8,092,000
Accumulated Depreciation	503,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Wiegman Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,906,000
Initial Cost to the Company [Abstract]
Land	2,197,000
Buildings and Improvements	8,788,000
Costs Capitalized Subsequent to Acquisition	1,647,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,308,000
Buildings and Improvements	10,324,000
Total	12,632,000
Accumulated Depreciation	4,264,000
Year Acquired	1996
Year Constructed	1986/87
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Huntwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	19,842,000
Initial Cost to the Company [Abstract]
Land	3,842,000
Buildings and Improvements	15,368,000
Costs Capitalized Subsequent to Acquisition	1,819,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,842,000
Buildings and Improvements	17,187,000
Total	21,029,000
Accumulated Depreciation	7,447,000
Year Acquired	1996
Year Constructed	1988
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | San Clemente Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	893,000
Buildings and Improvements	2,004,000
Costs Capitalized Subsequent to Acquisition	845,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	893,000
Buildings and Improvements	2,849,000
Total	3,742,000
Accumulated Depreciation	1,047,000
Year Acquired	1997
Year Constructed	1978
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Yosemite Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	259,000
Buildings and Improvements	7,058,000
Costs Capitalized Subsequent to Acquisition	992,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	259,000
Buildings and Improvements	8,050,000
Total	8,309,000
Accumulated Depreciation	3,328,000
Year Acquired	1999
Year Constructed	1974/87
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Kingsview Industrial Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,006,000
Initial Cost to the Company [Abstract]
Land	643,000
Buildings and Improvements	2,573,000
Costs Capitalized Subsequent to Acquisition	418,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	643,000
Buildings and Improvements	2,991,000
Total	3,634,000
Accumulated Depreciation	1,310,000
Year Acquired	1996
Year Constructed	1980
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Dominguez Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,264,000
Initial Cost to the Company [Abstract]
Land	2,006,000
Buildings and Improvements	8,025,000
Costs Capitalized Subsequent to Acquisition	1,170,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,006,000
Buildings and Improvements	9,195,000
Total	11,201,000
Accumulated Depreciation	4,315,000
Year Acquired	1996
Year Constructed	1977
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Main Street Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,504,000
Initial Cost to the Company [Abstract]
Land	1,606,000
Buildings and Improvements	4,103,000
Costs Capitalized Subsequent to Acquisition	636,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,606,000
Buildings and Improvements	4,739,000
Total	6,345,000
Accumulated Depreciation	2,049,000
Year Acquired	1999
Year Constructed	1999
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Walnut Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,488,000
Initial Cost to the Company [Abstract]
Land	2,885,000
Buildings and Improvements	5,274,000
Costs Capitalized Subsequent to Acquisition	894,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,885,000
Buildings and Improvements	6,168,000
Total	9,053,000
Accumulated Depreciation	2,638,000
Year Acquired	1996
Year Constructed	1966/90
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Washington Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,879,000
Initial Cost to the Company [Abstract]
Land	1,636,000
Buildings and Improvements	4,900,000
Costs Capitalized Subsequent to Acquisition	572,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,636,000
Buildings and Improvements	5,472,000
Total	7,108,000
Accumulated Depreciation	2,255,000
Year Acquired	1997
Year Constructed	1996/97
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chino Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,308,000
Initial Cost to the Company [Abstract]
Land	2,544,000
Buildings and Improvements	10,175,000
Costs Capitalized Subsequent to Acquisition	1,514,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,544,000
Buildings and Improvements	11,689,000
Total	14,233,000
Accumulated Depreciation	4,932,000
Year Acquired	1998
Year Constructed	1980
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	19,987,000
Initial Cost to the Company [Abstract]
Land	10,230,000
Buildings and Improvements	12,373,000
Costs Capitalized Subsequent to Acquisition	1,562,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	10,230,000
Buildings and Improvements	13,935,000
Total	24,165,000
Accumulated Depreciation	5,802,000
Year Acquired	1998
Year Constructed	1959
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,361,000
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	3,012,000
Costs Capitalized Subsequent to Acquisition	(157,000)
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	2,855,000
Total	2,855,000
Accumulated Depreciation	2,813,000
Year Acquired	2007
Year Constructed	1992
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chestnut Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,929,000
Initial Cost to the Company [Abstract]
Land	1,674,000
Buildings and Improvements	3,465,000
Costs Capitalized Subsequent to Acquisition	164,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,674,000
Buildings and Improvements	3,629,000
Total	5,303,000
Accumulated Depreciation	1,362,000
Year Acquired	1998
Year Constructed	1999
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Los Angeles Corporate Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,363,000
Buildings and Improvements	5,453,000
Costs Capitalized Subsequent to Acquisition	2,627,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,363,000
Buildings and Improvements	8,080,000
Total	9,443,000
Accumulated Depreciation	3,807,000
Year Acquired	1996
Year Constructed	1986
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | University Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,964,000
Initial Cost to the Company [Abstract]
Land	5,517,000
Buildings and Improvements	22,067,000
Costs Capitalized Subsequent to Acquisition	4,259,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	5,520,000
Buildings and Improvements	26,323,000
Total	31,843,000
Accumulated Depreciation	11,645,000
Year Acquired	1996
Year Constructed	1987/88
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | Castilian Research Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,719,000
Buildings and Improvements	1,410,000
Costs Capitalized Subsequent to Acquisition	4,839,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,719,000
Buildings and Improvements	6,249,000
Total	8,968,000
Accumulated Depreciation	787,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | CALIFORNIA [Member] | Fresno [Member] | Shaw Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,890,000
Initial Cost to the Company [Abstract]
Land	2,465,000
Buildings and Improvements	11,627,000
Costs Capitalized Subsequent to Acquisition	3,911,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,465,000
Buildings and Improvements	15,538,000
Total	18,003,000
Accumulated Depreciation	7,298,000
Year Acquired	1998
Year Constructed	1978/81/87
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Eastlake Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,339,000
Initial Cost to the Company [Abstract]
Land	3,046,000
Buildings and Improvements	6,888,000
Costs Capitalized Subsequent to Acquisition	1,500,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,046,000
Buildings and Improvements	8,388,000
Total	11,434,000
Accumulated Depreciation	3,757,000
Year Acquired	1997
Year Constructed	1989
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Ocean View Corporate Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,111,000
Initial Cost to the Company [Abstract]
Land	6,577,000
Buildings and Improvements	7,105,000
Costs Capitalized Subsequent to Acquisition	130,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	6,577,000
Buildings and Improvements	7,235,000
Total	13,812,000
Accumulated Depreciation	875,000
Year Acquired	2010
Year Constructed	2005
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,621,000
Initial Cost to the Company [Abstract]
Land	1,746,000
Buildings and Improvements	4,941,000
Costs Capitalized Subsequent to Acquisition	1,966,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,746,000
Buildings and Improvements	6,907,000
Total	8,653,000
Accumulated Depreciation	4,730,000
Year Acquired	1988
Year Constructed	1978
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,454,000
Initial Cost to the Company [Abstract]
Land	519,000
Buildings and Improvements	2,008,000
Costs Capitalized Subsequent to Acquisition	680,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	519,000
Buildings and Improvements	2,688,000
Total	3,207,000
Accumulated Depreciation	1,305,000
Year Acquired	2000
Year Constructed	1979
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	416,000
Buildings and Improvements	2,481,000
Costs Capitalized Subsequent to Acquisition	260,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	416,000
Buildings and Improvements	2,741,000
Total	3,157,000
Accumulated Depreciation	912,000
Year Acquired	2004
Year Constructed	2002
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center V, VI, VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,824,000
Buildings and Improvements	4,106,000
Costs Capitalized Subsequent to Acquisition	563,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,824,000
Buildings and Improvements	4,669,000
Total	6,493,000
Accumulated Depreciation	1,207,000
Year Acquired	2009
Year Constructed	1979/80/81
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Venture Warehouses [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,481,000
Initial Cost to the Company [Abstract]
Land	1,452,000
Buildings and Improvements	3,762,000
Costs Capitalized Subsequent to Acquisition	1,949,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,452,000
Buildings and Improvements	5,711,000
Total	7,163,000
Accumulated Depreciation	3,697,000
Year Acquired	1988
Year Constructed	1979
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Stemmons Circle [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,217,000
Initial Cost to the Company [Abstract]
Land	363,000
Buildings and Improvements	2,014,000
Costs Capitalized Subsequent to Acquisition	521,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	363,000
Buildings and Improvements	2,535,000
Total	2,898,000
Accumulated Depreciation	1,342,000
Year Acquired	1998
Year Constructed	1977
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Ambassador Row Warehouses [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,156,000
Buildings and Improvements	4,625,000
Costs Capitalized Subsequent to Acquisition	1,826,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,156,000
Buildings and Improvements	6,451,000
Total	7,607,000
Accumulated Depreciation	3,696,000
Year Acquired	1998
Year Constructed	1958/65
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	150,000
Buildings and Improvements	583,000
Costs Capitalized Subsequent to Acquisition	384,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	150,000
Buildings and Improvements	967,000
Total	1,117,000
Accumulated Depreciation	320,000
Year Acquired	2002
Year Constructed	1971
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	380,000
Buildings and Improvements	2,066,000
Costs Capitalized Subsequent to Acquisition	2,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	380,000
Buildings and Improvements	2,068,000
Total	2,448,000
Accumulated Depreciation	319,000
Year Acquired	2007
Year Constructed	1974
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Shady Trail Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,966,000
Initial Cost to the Company [Abstract]
Land	635,000
Buildings and Improvements	3,621,000
Costs Capitalized Subsequent to Acquisition	678,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	635,000
Buildings and Improvements	4,299,000
Total	4,934,000
Accumulated Depreciation	1,270,000
Year Acquired	2003
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | Northwest Point Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,759,000
Initial Cost to the Company [Abstract]
Land	1,243,000
Buildings and Improvements	5,640,000
Costs Capitalized Subsequent to Acquisition	3,574,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,243,000
Buildings and Improvements	9,214,000
Total	10,457,000
Accumulated Depreciation	5,270,000
Year Acquired	1994
Year Constructed	1984/85
Industrial [Member] | TEXAS [Member] | Houston [Member] | Lockwood Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,503,000
Initial Cost to the Company [Abstract]
Land	749,000
Buildings and Improvements	5,444,000
Costs Capitalized Subsequent to Acquisition	1,983,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	749,000
Buildings and Improvements	7,427,000
Total	8,176,000
Accumulated Depreciation	3,249,000
Year Acquired	1997
Year Constructed	1968/69
Industrial [Member] | TEXAS [Member] | Houston [Member] | West Loop Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,623,000
Initial Cost to the Company [Abstract]
Land	905,000
Buildings and Improvements	4,383,000
Costs Capitalized Subsequent to Acquisition	2,061,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	905,000
Buildings and Improvements	6,444,000
Total	7,349,000
Accumulated Depreciation	3,220,000
Year Acquired	1997/2000
Year Constructed	1980
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 1 and 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,090,000
Initial Cost to the Company [Abstract]
Land	660,000
Buildings and Improvements	5,893,000
Costs Capitalized Subsequent to Acquisition	1,113,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	660,000
Buildings and Improvements	7,006,000
Total	7,666,000
Accumulated Depreciation	3,494,000
Year Acquired	1998
Year Constructed	1996
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 3, 4 and 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,195,000
Initial Cost to the Company [Abstract]
Land	1,025,000
Buildings and Improvements	6,413,000
Costs Capitalized Subsequent to Acquisition	659,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,025,000
Buildings and Improvements	7,072,000
Total	8,097,000
Accumulated Depreciation	3,241,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 6 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,549,000
Initial Cost to the Company [Abstract]
Land	425,000
Buildings and Improvements	2,423,000
Costs Capitalized Subsequent to Acquisition	483,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	425,000
Buildings and Improvements	2,906,000
Total	3,331,000
Accumulated Depreciation	1,368,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 7 and 8 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,781,000
Initial Cost to the Company [Abstract]
Land	680,000
Buildings and Improvements	4,584,000
Costs Capitalized Subsequent to Acquisition	3,597,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	680,000
Buildings and Improvements	8,181,000
Total	8,861,000
Accumulated Depreciation	3,731,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 9 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,062,000
Initial Cost to the Company [Abstract]
Land	800,000
Buildings and Improvements	4,355,000
Costs Capitalized Subsequent to Acquisition	1,460,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	800,000
Buildings and Improvements	5,815,000
Total	6,615,000
Accumulated Depreciation	1,933,000
Year Acquired	1998
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 10 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,305,000
Initial Cost to the Company [Abstract]
Land	933,000
Buildings and Improvements	4,779,000
Costs Capitalized Subsequent to Acquisition	289,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	933,000
Buildings and Improvements	5,068,000
Total	6,001,000
Accumulated Depreciation	1,677,000
Year Acquired	2001
Year Constructed	1999
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 11 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,051,000
Initial Cost to the Company [Abstract]
Land	638,000
Buildings and Improvements	3,764,000
Costs Capitalized Subsequent to Acquisition	1,139,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	638,000
Buildings and Improvements	4,903,000
Total	5,541,000
Accumulated Depreciation	1,842,000
Year Acquired	1999
Year Constructed	1999
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,634,000
Initial Cost to the Company [Abstract]
Land	340,000
Buildings and Improvements	2,419,000
Costs Capitalized Subsequent to Acquisition	199,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	340,000
Buildings and Improvements	2,618,000
Total	2,958,000
Accumulated Depreciation	1,225,000
Year Acquired	2000
Year Constructed	2002
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,732,000
Initial Cost to the Company [Abstract]
Land	282,000
Buildings and Improvements	2,569,000
Costs Capitalized Subsequent to Acquisition	284,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	282,000
Buildings and Improvements	2,853,000
Total	3,135,000
Accumulated Depreciation	1,564,000
Year Acquired	2000
Year Constructed	2002
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,126,000
Initial Cost to the Company [Abstract]
Land	722,000
Buildings and Improvements	2,629,000
Costs Capitalized Subsequent to Acquisition	509,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	722,000
Buildings and Improvements	3,138,000
Total	3,860,000
Accumulated Depreciation	1,316,000
Year Acquired	2000
Year Constructed	2003
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 15 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,733,000
Initial Cost to the Company [Abstract]
Land	731,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,758,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	731,000
Buildings and Improvements	5,758,000
Total	6,489,000
Accumulated Depreciation	1,996,000
Year Acquired	2000
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 16 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,410,000
Initial Cost to the Company [Abstract]
Land	519,000
Buildings and Improvements	4,248,000
Costs Capitalized Subsequent to Acquisition	786,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	519,000
Buildings and Improvements	5,034,000
Total	5,553,000
Accumulated Depreciation	1,739,000
Year Acquired	2000
Year Constructed	2005
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 17 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,592,000
Initial Cost to the Company [Abstract]
Land	373,000
Buildings and Improvements	1,945,000
Costs Capitalized Subsequent to Acquisition	785,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	373,000
Buildings and Improvements	2,730,000
Total	3,103,000
Accumulated Depreciation	759,000
Year Acquired	2000
Year Constructed	2004
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	323,000
Buildings and Improvements	1,512,000
Costs Capitalized Subsequent to Acquisition	211,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	323,000
Buildings and Improvements	1,723,000
Total	2,046,000
Accumulated Depreciation	483,000
Year Acquired	2005
Year Constructed	1995
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 19 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,129,000
Initial Cost to the Company [Abstract]
Land	373,000
Buildings and Improvements	2,256,000
Costs Capitalized Subsequent to Acquisition	865,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	373,000
Buildings and Improvements	3,121,000
Total	3,494,000
Accumulated Depreciation	1,470,000
Year Acquired	2000
Year Constructed	2004
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 20 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,675,000
Initial Cost to the Company [Abstract]
Land	1,008,000
Buildings and Improvements	1,948,000
Costs Capitalized Subsequent to Acquisition	1,147,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,008,000
Buildings and Improvements	3,095,000
Total	4,103,000
Accumulated Depreciation	1,330,000
Year Acquired	2000
Year Constructed	2004
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 21 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,107,000
Initial Cost to the Company [Abstract]
Land	436,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,474,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	436,000
Buildings and Improvements	3,474,000
Total	3,910,000
Accumulated Depreciation	685,000
Year Acquired	2000/03
Year Constructed	2006
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 22 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,389,000
Initial Cost to the Company [Abstract]
Land	436,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,210,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	436,000
Buildings and Improvements	4,210,000
Total	4,646,000
Accumulated Depreciation	927,000
Year Acquired	2000
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 23 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,305,000
Initial Cost to the Company [Abstract]
Land	910,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	7,026,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	910,000
Buildings and Improvements	7,026,000
Total	7,936,000
Accumulated Depreciation	1,330,000
Year Acquired	2000
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 24 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,471,000
Initial Cost to the Company [Abstract]
Land	837,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,414,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	837,000
Buildings and Improvements	5,414,000
Total	6,251,000
Accumulated Depreciation	1,126,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 25 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,953,000
Initial Cost to the Company [Abstract]
Land	508,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,620,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	508,000
Buildings and Improvements	3,620,000
Total	4,128,000
Accumulated Depreciation	546,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 26 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,890,000
Initial Cost to the Company [Abstract]
Land	445,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,147,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	445,000
Buildings and Improvements	3,147,000
Total	3,592,000
Accumulated Depreciation	436,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 27 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,149,000
Initial Cost to the Company [Abstract]
Land	837,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,964,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	837,000
Buildings and Improvements	4,964,000
Total	5,801,000
Accumulated Depreciation	599,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 28 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,698,000
Initial Cost to the Company [Abstract]
Land	550,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,047,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	550,000
Buildings and Improvements	4,047,000
Total	4,597,000
Accumulated Depreciation	451,000
Year Acquired	2005
Year Constructed	2009
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 29 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,952,000
Initial Cost to the Company [Abstract]
Land	782,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,130,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	974,000
Buildings and Improvements	3,938,000
Total	4,912,000
Accumulated Depreciation	415,000
Year Acquired	2007
Year Constructed	2009
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 30 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,334,000
Initial Cost to the Company [Abstract]
Land	981,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,650,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,222,000
Buildings and Improvements	5,409,000
Total	6,631,000
Accumulated Depreciation	547,000
Year Acquired	2007
Year Constructed	2009
Industrial [Member] | TEXAS [Member] | Houston [Member] | America Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,706,000
Initial Cost to the Company [Abstract]
Land	662,000
Buildings and Improvements	4,660,000
Costs Capitalized Subsequent to Acquisition	829,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	662,000
Buildings and Improvements	5,489,000
Total	6,151,000
Accumulated Depreciation	2,491,000
Year Acquired	1998
Year Constructed	1996
Industrial [Member] | TEXAS [Member] | Houston [Member] | Central Green Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,611,000
Initial Cost to the Company [Abstract]
Land	566,000
Buildings and Improvements	4,031,000
Costs Capitalized Subsequent to Acquisition	122,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	566,000
Buildings and Improvements	4,153,000
Total	4,719,000
Accumulated Depreciation	1,795,000
Year Acquired	1999
Year Constructed	1998
Industrial [Member] | TEXAS [Member] | Houston [Member] | Glenmont Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,323,000
Initial Cost to the Company [Abstract]
Land	936,000
Buildings and Improvements	6,161,000
Costs Capitalized Subsequent to Acquisition	2,474,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	936,000
Buildings and Improvements	8,635,000
Total	9,571,000
Accumulated Depreciation	3,588,000
Year Acquired	1998
Year Constructed	1999/2000
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,594,000
Initial Cost to the Company [Abstract]
Land	729,000
Buildings and Improvements	3,765,000
Costs Capitalized Subsequent to Acquisition	2,032,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	729,000
Buildings and Improvements	5,797,000
Total	6,526,000
Accumulated Depreciation	2,357,000
Year Acquired	2000
Year Constructed	2001
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,417,000
Initial Cost to the Company [Abstract]
Land	550,000
Buildings and Improvements	3,689,000
Costs Capitalized Subsequent to Acquisition	691,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	550,000
Buildings and Improvements	4,380,000
Total	4,930,000
Accumulated Depreciation	1,445,000
Year Acquired	2000
Year Constructed	2004
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,456,000
Initial Cost to the Company [Abstract]
Land	597,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,512,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	751,000
Buildings and Improvements	5,358,000
Total	6,109,000
Accumulated Depreciation	1,514,000
Year Acquired	1999
Year Constructed	2006
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,967,000
Initial Cost to the Company [Abstract]
Land	535,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,639,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	674,000
Buildings and Improvements	5,500,000
Total	6,174,000
Accumulated Depreciation	712,000
Year Acquired	1999
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,165,000
Initial Cost to the Company [Abstract]
Land	458,000
Buildings and Improvements	5,712,000
Costs Capitalized Subsequent to Acquisition	1,394,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	458,000
Buildings and Improvements	7,106,000
Total	7,564,000
Accumulated Depreciation	2,723,000
Year Acquired	2002
Year Constructed	2001
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,306,000
Initial Cost to the Company [Abstract]
Land	415,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,747,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	415,000
Buildings and Improvements	2,747,000
Total	3,162,000
Accumulated Depreciation	659,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,574,000
Initial Cost to the Company [Abstract]
Land	460,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,069,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	460,000
Buildings and Improvements	3,069,000
Total	3,529,000
Accumulated Depreciation	763,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,510,000
Initial Cost to the Company [Abstract]
Land	460,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,981,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	460,000
Buildings and Improvements	2,981,000
Total	3,441,000
Accumulated Depreciation	838,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,350,000
Initial Cost to the Company [Abstract]
Land	701,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,706,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	701,000
Buildings and Improvements	4,706,000
Total	5,407,000
Accumulated Depreciation	871,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	618,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,995,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	618,000
Buildings and Improvements	5,995,000
Total	6,613,000
Accumulated Depreciation	578,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	765,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,705,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	765,000
Buildings and Improvements	5,705,000
Total	6,470,000
Accumulated Depreciation	614,000
Year Acquired	2005
Year Constructed	2009
Industrial [Member] | TEXAS [Member] | Houston [Member] | Kirby Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,910,000
Initial Cost to the Company [Abstract]
Land	530,000
Buildings and Improvements	3,153,000
Costs Capitalized Subsequent to Acquisition	332,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	530,000
Buildings and Improvements	3,485,000
Total	4,015,000
Accumulated Depreciation	951,000
Year Acquired	2004
Year Constructed	1980
Industrial [Member] | TEXAS [Member] | Houston [Member] | Clay Campbell Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	742,000
Buildings and Improvements	2,998,000
Costs Capitalized Subsequent to Acquisition	370,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	742,000
Buildings and Improvements	3,368,000
Total	4,110,000
Accumulated Depreciation	1,160,000
Year Acquired	2005
Year Constructed	1982
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Butterfield Trail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	20,725,000
Costs Capitalized Subsequent to Acquisition	6,003,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	26,728,000
Total	26,728,000
Accumulated Depreciation	13,643,000
Year Acquired	1997/2000
Year Constructed	1987/95
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Rojas Commerce Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,391,000
Initial Cost to the Company [Abstract]
Land	900,000
Buildings and Improvements	3,659,000
Costs Capitalized Subsequent to Acquisition	2,486,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	900,000
Buildings and Improvements	6,145,000
Total	7,045,000
Accumulated Depreciation	3,969,000
Year Acquired	1999
Year Constructed	1986
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Americas Ten Business Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,862,000
Initial Cost to the Company [Abstract]
Land	526,000
Buildings and Improvements	2,778,000
Costs Capitalized Subsequent to Acquisition	1,107,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	526,000
Buildings and Improvements	3,885,000
Total	4,411,000
Accumulated Depreciation	1,704,000
Year Acquired	2001
Year Constructed	2003
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Alamo Downs Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,832,000
Initial Cost to the Company [Abstract]
Land	1,342,000
Buildings and Improvements	6,338,000
Costs Capitalized Subsequent to Acquisition	922,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,342,000
Buildings and Improvements	7,260,000
Total	8,602,000
Accumulated Depreciation	2,952,000
Year Acquired	2004
Year Constructed	1986/2002
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	30,842,000
Initial Cost to the Company [Abstract]
Land	4,143,000
Buildings and Improvements	31,432,000
Costs Capitalized Subsequent to Acquisition	3,257,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,143,000
Buildings and Improvements	34,689,000
Total	38,832,000
Accumulated Depreciation	11,397,000
Year Acquired	2005
Year Constructed	1988-2000/06
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,941,000
Initial Cost to the Company [Abstract]
Land	423,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,280,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	423,000
Buildings and Improvements	3,280,000
Total	3,703,000
Accumulated Depreciation	774,000
Year Acquired	2005
Year Constructed	2006
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 16 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,108,000
Initial Cost to the Company [Abstract]
Land	427,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,485,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	427,000
Buildings and Improvements	3,485,000
Total	3,912,000
Accumulated Depreciation	576,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 17 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,452,000
Initial Cost to the Company [Abstract]
Land	616,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,731,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	616,000
Buildings and Improvements	3,731,000
Total	4,347,000
Accumulated Depreciation	1,059,000
Year Acquired	2005
Year Constructed	2007
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 18 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	418,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,316,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	418,000
Buildings and Improvements	2,316,000
Total	2,734,000
Accumulated Depreciation	536,000
Year Acquired	2005
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,735,000
Initial Cost to the Company [Abstract]
Land	1,494,000
Buildings and Improvements	10,804,000
Costs Capitalized Subsequent to Acquisition	2,420,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,494,000
Buildings and Improvements	13,224,000
Total	14,718,000
Accumulated Depreciation	4,360,000
Year Acquired	2005
Year Constructed	1998/99
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building A [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,999,000
Initial Cost to the Company [Abstract]
Land	412,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,316,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	412,000
Buildings and Improvements	3,316,000
Total	3,728,000
Accumulated Depreciation	715,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,269,000
Initial Cost to the Company [Abstract]
Land	505,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,559,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	505,000
Buildings and Improvements	3,559,000
Total	4,064,000
Accumulated Depreciation	547,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building C [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,997,000
Initial Cost to the Company [Abstract]
Land	546,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,180,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	546,000
Buildings and Improvements	3,180,000
Total	3,726,000
Accumulated Depreciation	287,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Phase II, Building D [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,720,000
Initial Cost to the Company [Abstract]
Land	1,056,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	7,297,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,056,000
Buildings and Improvements	7,297,000
Total	8,353,000
Accumulated Depreciation	936,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Fairgrounds Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,221,000
Initial Cost to the Company [Abstract]
Land	1,644,000
Buildings and Improvements	8,209,000
Costs Capitalized Subsequent to Acquisition	1,418,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,644,000
Buildings and Improvements	9,627,000
Total	11,271,000
Accumulated Depreciation	2,461,000
Year Acquired	2007
Year Constructed	1985/86
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 8 expansion [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,227,000
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,545,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	1,545,000
Total	1,545,000
Accumulated Depreciation	34,000
Year Acquired	2005
Year Constructed	2011
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Rittiman Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,083,000
Buildings and Improvements	6,649,000
Costs Capitalized Subsequent to Acquisition	0
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,083,000
Buildings and Improvements	6,649,000
Total	7,732,000
Accumulated Depreciation	9,000
Year Acquired	2011
Year Constructed	2000
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,728,000
Initial Cost to the Company [Abstract]
Land	837,000
Buildings and Improvements	3,349,000
Costs Capitalized Subsequent to Acquisition	753,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	837,000
Buildings and Improvements	4,102,000
Total	4,939,000
Accumulated Depreciation	2,021,000
Year Acquired	1996
Year Constructed	1971
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	455,000
Buildings and Improvements	482,000
Costs Capitalized Subsequent to Acquisition	161,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	455,000
Buildings and Improvements	643,000
Total	1,098,000
Accumulated Depreciation	349,000
Year Acquired	1999
Year Constructed	1971
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,622,000
Initial Cost to the Company [Abstract]
Land	775,000
Buildings and Improvements	1,742,000
Costs Capitalized Subsequent to Acquisition	420,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	775,000
Buildings and Improvements	2,162,000
Total	2,937,000
Accumulated Depreciation	948,000
Year Acquired	2000
Year Constructed	1983
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,552,000
Initial Cost to the Company [Abstract]
Land	380,000
Buildings and Improvements	1,652,000
Costs Capitalized Subsequent to Acquisition	778,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	380,000
Buildings and Improvements	2,430,000
Total	2,810,000
Accumulated Depreciation	992,000
Year Acquired	2000
Year Constructed	1986
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park V [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	854,000
Initial Cost to the Company [Abstract]
Land	353,000
Buildings and Improvements	1,090,000
Costs Capitalized Subsequent to Acquisition	107,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	353,000
Buildings and Improvements	1,197,000
Total	1,550,000
Accumulated Depreciation	514,000
Year Acquired	2002
Year Constructed	1980
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park VI [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,348,000
Initial Cost to the Company [Abstract]
Land	599,000
Buildings and Improvements	1,855,000
Costs Capitalized Subsequent to Acquisition	502,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	599,000
Buildings and Improvements	2,357,000
Total	2,956,000
Accumulated Depreciation	1,019,000
Year Acquired	2002
Year Constructed	1979
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Kyrene Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	310,000
Initial Cost to the Company [Abstract]
Land	850,000
Buildings and Improvements	2,044,000
Costs Capitalized Subsequent to Acquisition	544,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	850,000
Buildings and Improvements	2,588,000
Total	3,438,000
Accumulated Depreciation	1,267,000
Year Acquired	1999
Year Constructed	1981
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Kyrene Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	640,000
Buildings and Improvements	2,409,000
Costs Capitalized Subsequent to Acquisition	706,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	640,000
Buildings and Improvements	3,115,000
Total	3,755,000
Accumulated Depreciation	1,464,000
Year Acquired	1999
Year Constructed	2001
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Southpark Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,342,000
Initial Cost to the Company [Abstract]
Land	918,000
Buildings and Improvements	2,738,000
Costs Capitalized Subsequent to Acquisition	585,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	918,000
Buildings and Improvements	3,323,000
Total	4,241,000
Accumulated Depreciation	1,156,000
Year Acquired	2001
Year Constructed	2000
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Santan 10 Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,971,000
Initial Cost to the Company [Abstract]
Land	846,000
Buildings and Improvements	2,647,000
Costs Capitalized Subsequent to Acquisition	248,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	846,000
Buildings and Improvements	2,895,000
Total	3,741,000
Accumulated Depreciation	1,049,000
Year Acquired	2001
Year Constructed	2005
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Santan 10 Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,907,000
Initial Cost to the Company [Abstract]
Land	1,088,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,089,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,088,000
Buildings and Improvements	5,089,000
Total	6,177,000
Accumulated Depreciation	1,232,000
Year Acquired	2004
Year Constructed	2007
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Metro Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,927,000
Buildings and Improvements	7,708,000
Costs Capitalized Subsequent to Acquisition	5,271,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,927,000
Buildings and Improvements	12,979,000
Total	14,906,000
Accumulated Depreciation	6,892,000
Year Acquired	1996
Year Constructed	1977/79
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 35th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,764,000
Initial Cost to the Company [Abstract]
Land	418,000
Buildings and Improvements	2,381,000
Costs Capitalized Subsequent to Acquisition	405,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	418,000
Buildings and Improvements	2,786,000
Total	3,204,000
Accumulated Depreciation	1,087,000
Year Acquired	1997
Year Constructed	1967
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Estrella Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	628,000
Buildings and Improvements	4,694,000
Costs Capitalized Subsequent to Acquisition	1,768,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	628,000
Buildings and Improvements	6,462,000
Total	7,090,000
Accumulated Depreciation	2,239,000
Year Acquired	1998
Year Constructed	1988
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 51st Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,720,000
Initial Cost to the Company [Abstract]
Land	300,000
Buildings and Improvements	2,029,000
Costs Capitalized Subsequent to Acquisition	785,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	300,000
Buildings and Improvements	2,814,000
Total	3,114,000
Accumulated Depreciation	1,287,000
Year Acquired	1998
Year Constructed	1987
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | East University Distribution Center I and II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,057,000
Initial Cost to the Company [Abstract]
Land	1,120,000
Buildings and Improvements	4,482,000
Costs Capitalized Subsequent to Acquisition	763,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,120,000
Buildings and Improvements	5,245,000
Total	6,365,000
Accumulated Depreciation	2,496,000
Year Acquired	1998
Year Constructed	1987/89
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | East University Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	444,000
Buildings and Improvements	698,000
Costs Capitalized Subsequent to Acquisition	47,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	444,000
Buildings and Improvements	745,000
Total	1,189,000
Accumulated Depreciation	55,000
Year Acquired	2010
Year Constructed	1981
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 55th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,258,000
Initial Cost to the Company [Abstract]
Land	912,000
Buildings and Improvements	3,717,000
Costs Capitalized Subsequent to Acquisition	730,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	917,000
Buildings and Improvements	4,442,000
Total	5,359,000
Accumulated Depreciation	2,141,000
Year Acquired	1998
Year Constructed	1987
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	798,000
Buildings and Improvements	3,632,000
Costs Capitalized Subsequent to Acquisition	819,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	798,000
Buildings and Improvements	4,451,000
Total	5,249,000
Accumulated Depreciation	1,894,000
Year Acquired	1999
Year Constructed	1988
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	320,000
Buildings and Improvements	2,448,000
Costs Capitalized Subsequent to Acquisition	359,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	320,000
Buildings and Improvements	2,807,000
Total	3,127,000
Accumulated Depreciation	1,063,000
Year Acquired	1999
Year Constructed	2000
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Interstate Commons Dist Ctr III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	242,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,882,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	242,000
Buildings and Improvements	2,882,000
Total	3,124,000
Accumulated Depreciation	477,000
Year Acquired	2000
Year Constructed	2008
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Airport Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,000,000
Buildings and Improvements	1,510,000
Costs Capitalized Subsequent to Acquisition	791,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,000,000
Buildings and Improvements	2,301,000
Total	3,301,000
Accumulated Depreciation	857,000
Year Acquired	2003
Year Constructed	1971
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | 40th Avenue Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,415,000
Initial Cost to the Company [Abstract]
Land	703,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,028,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	703,000
Buildings and Improvements	6,028,000
Total	6,731,000
Accumulated Depreciation	771,000
Year Acquired	2004
Year Constructed	2008
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Sky Harbor Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	5,839,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	20,620,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	5,839,000
Buildings and Improvements	20,620,000
Total	26,459,000
Accumulated Depreciation	1,869,000
Year Acquired	2006
Year Constructed	2008
Industrial [Member] | ARIZONA [Member] | Phoenix area [Member] | Broadway Industrial Park VII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	450,000
Buildings and Improvements	650,000
Costs Capitalized Subsequent to Acquisition	19,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	450,000
Buildings and Improvements	669,000
Total	1,119,000
Accumulated Depreciation	4,000
Year Acquired	2011
Year Constructed	1999
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,503,000
Initial Cost to the Company [Abstract]
Land	506,000
Buildings and Improvements	3,564,000
Costs Capitalized Subsequent to Acquisition	2,073,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	693,000
Buildings and Improvements	5,450,000
Total	6,143,000
Accumulated Depreciation	1,711,000
Year Acquired	1997/2003
Year Constructed	1994/2003
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	442,000
Buildings and Improvements	3,381,000
Costs Capitalized Subsequent to Acquisition	37,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	442,000
Buildings and Improvements	3,418,000
Total	3,860,000
Accumulated Depreciation	595,000
Year Acquired	2007
Year Constructed	2000
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club III and IV [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,407,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	11,076,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,575,000
Buildings and Improvements	10,908,000
Total	12,483,000
Accumulated Depreciation	951,000
Year Acquired	2007
Year Constructed	2009
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Airport Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,037,000
Initial Cost to the Company [Abstract]
Land	1,103,000
Buildings and Improvements	4,672,000
Costs Capitalized Subsequent to Acquisition	1,534,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,103,000
Buildings and Improvements	6,206,000
Total	7,309,000
Accumulated Depreciation	2,844,000
Year Acquired	1998
Year Constructed	1995
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Southpointe Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,829,000
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	3,982,000
Costs Capitalized Subsequent to Acquisition	2,950,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	0
Buildings and Improvements	6,932,000
Total	6,932,000
Accumulated Depreciation	2,993,000
Year Acquired	1999
Year Constructed	1989
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Benan Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	707,000
Buildings and Improvements	1,842,000
Costs Capitalized Subsequent to Acquisition	602,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	707,000
Buildings and Improvements	2,444,000
Total	3,151,000
Accumulated Depreciation	995,000
Year Acquired	2005
Year Constructed	2001
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | NorthPark Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	16,605,000
Initial Cost to the Company [Abstract]
Land	2,758,000
Buildings and Improvements	15,932,000
Costs Capitalized Subsequent to Acquisition	2,209,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,758,000
Buildings and Improvements	18,141,000
Total	20,899,000
Accumulated Depreciation	4,660,000
Year Acquired	2006
Year Constructed	1987-89
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lindbergh Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	470,000
Buildings and Improvements	3,401,000
Costs Capitalized Subsequent to Acquisition	262,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	470,000
Buildings and Improvements	3,663,000
Total	4,133,000
Accumulated Depreciation	889,000
Year Acquired	2007
Year Constructed	2001/03
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,159,000
Initial Cost to the Company [Abstract]
Land	765,000
Buildings and Improvements	4,303,000
Costs Capitalized Subsequent to Acquisition	635,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	765,000
Buildings and Improvements	4,938,000
Total	5,703,000
Accumulated Depreciation	1,089,000
Year Acquired	2007
Year Constructed	1983
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	335,000
Buildings and Improvements	1,603,000
Costs Capitalized Subsequent to Acquisition	142,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	335,000
Buildings and Improvements	1,745,000
Total	2,080,000
Accumulated Depreciation	194,000
Year Acquired	2010
Year Constructed	1987
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	558,000
Buildings and Improvements	2,225,000
Costs Capitalized Subsequent to Acquisition	177,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	558,000
Buildings and Improvements	2,402,000
Total	2,960,000
Accumulated Depreciation	259,000
Year Acquired	2010
Year Constructed	1981
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Nations Ford Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,766,000
Initial Cost to the Company [Abstract]
Land	3,924,000
Buildings and Improvements	16,171,000
Costs Capitalized Subsequent to Acquisition	1,523,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,924,000
Buildings and Improvements	17,694,000
Total	21,618,000
Accumulated Depreciation	4,839,000
Year Acquired	2007
Year Constructed	1989/94
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Airport Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,840,000
Initial Cost to the Company [Abstract]
Land	1,454,000
Buildings and Improvements	10,136,000
Costs Capitalized Subsequent to Acquisition	769,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,454,000
Buildings and Improvements	10,905,000
Total	12,359,000
Accumulated Depreciation	1,673,000
Year Acquired	2008
Year Constructed	2001/02
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Interchange Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,587,000
Initial Cost to the Company [Abstract]
Land	986,000
Buildings and Improvements	7,949,000
Costs Capitalized Subsequent to Acquisition	273,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	986,000
Buildings and Improvements	8,222,000
Total	9,208,000
Accumulated Depreciation	1,188,000
Year Acquired	2008
Year Constructed	1989
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,599,000
Initial Cost to the Company [Abstract]
Land	1,284,000
Buildings and Improvements	13,163,000
Costs Capitalized Subsequent to Acquisition	371,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,284,000
Buildings and Improvements	13,534,000
Total	14,818,000
Accumulated Depreciation	1,712,000
Year Acquired	2008
Year Constructed	2006
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Waterford Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,926,000
Initial Cost to the Company [Abstract]
Land	654,000
Buildings and Improvements	3,392,000
Costs Capitalized Subsequent to Acquisition	45,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	654,000
Buildings and Improvements	3,437,000
Total	4,091,000
Accumulated Depreciation	367,000
Year Acquired	2008
Year Constructed	2000
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	3,033,000
Buildings and Improvements	11,497,000
Costs Capitalized Subsequent to Acquisition	12,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,033,000
Buildings and Improvements	11,509,000
Total	14,542,000
Accumulated Depreciation	156,000
Year Acquired	2011
Year Constructed	2003
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lakeview Business [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,392,000
Buildings and Improvements	5,068,000
Costs Capitalized Subsequent to Acquisition	39,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,392,000
Buildings and Improvements	5,107,000
Total	6,499,000
Accumulated Depreciation	97,000
Year Acquired	2011
Year Constructed	1996
Industrial [Member] | LOUISIANA [Member] | New Orleans [Member] | Elmwood Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,861,000
Buildings and Improvements	6,337,000
Costs Capitalized Subsequent to Acquisition	3,377,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,861,000
Buildings and Improvements	9,714,000
Total	12,575,000
Accumulated Depreciation	5,821,000
Year Acquired	1997
Year Constructed	1979
Industrial [Member] | LOUISIANA [Member] | New Orleans [Member] | Riverbend Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,592,000
Buildings and Improvements	17,623,000
Costs Capitalized Subsequent to Acquisition	3,262,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,592,000
Buildings and Improvements	20,885,000
Total	23,477,000
Accumulated Depreciation	9,601,000
Year Acquired	1997
Year Constructed	1984
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,010,000
Initial Cost to the Company [Abstract]
Land	1,023,000
Buildings and Improvements	3,861,000
Costs Capitalized Subsequent to Acquisition	1,424,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,023,000
Buildings and Improvements	5,285,000
Total	6,308,000
Accumulated Depreciation	3,118,000
Year Acquired	1988
Year Constructed	1987
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,274,000
Initial Cost to the Company [Abstract]
Land	230,000
Buildings and Improvements	2,977,000
Costs Capitalized Subsequent to Acquisition	916,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	230,000
Buildings and Improvements	3,893,000
Total	4,123,000
Accumulated Depreciation	2,274,000
Year Acquired	1996/97
Year Constructed	1996/97
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center III [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,002,000
Initial Cost to the Company [Abstract]
Land	1,098,000
Buildings and Improvements	3,884,000
Costs Capitalized Subsequent to Acquisition	1,316,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,098,000
Buildings and Improvements	5,200,000
Total	6,298,000
Accumulated Depreciation	2,227,000
Year Acquired	1997/98
Year Constructed	1999
Industrial [Member] | COLORADO [Member] | Denver [Member] | Concord Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,051,000
Buildings and Improvements	4,773,000
Costs Capitalized Subsequent to Acquisition	413,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,051,000
Buildings and Improvements	5,186,000
Total	6,237,000
Accumulated Depreciation	1,095,000
Year Acquired	2007
Year Constructed	2000
Industrial [Member] | COLORADO [Member] | Denver [Member] | Centennial Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,639,000
Initial Cost to the Company [Abstract]
Land	750,000
Buildings and Improvements	3,319,000
Costs Capitalized Subsequent to Acquisition	1,697,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	750,000
Buildings and Improvements	5,016,000
Total	5,766,000
Accumulated Depreciation	740,000
Year Acquired	2007
Year Constructed	1990
Industrial [Member] | NEVADA [Member] | Las Vegas [Member] | Arville Distribution Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	4,933,000
Buildings and Improvements	5,094,000
Costs Capitalized Subsequent to Acquisition	197,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	4,933,000
Buildings and Improvements	5,291,000
Total	10,224,000
Accumulated Depreciation	844,000
Year Acquired	2009
Year Constructed	1997
Industrial [Member] | MISSISSIPPI [Member] | Interchange Business Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,153,000
Initial Cost to the Company [Abstract]
Land	343,000
Buildings and Improvements	5,007,000
Costs Capitalized Subsequent to Acquisition	2,171,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	343,000
Buildings and Improvements	7,178,000
Total	7,521,000
Accumulated Depreciation	3,663,000
Year Acquired	1997
Year Constructed	1981
Industrial [Member] | MISSISSIPPI [Member] | Tower Automotive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	0
Buildings and Improvements	9,958,000
Costs Capitalized Subsequent to Acquisition	1,190,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	17,000
Buildings and Improvements	11,131,000
Total	11,148,000
Accumulated Depreciation	3,156,000
Year Acquired	2001
Year Constructed	2002
Industrial [Member] | MISSISSIPPI [Member] | Metro Airport Commerce Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	303,000
Buildings and Improvements	1,479,000
Costs Capitalized Subsequent to Acquisition	956,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	303,000
Buildings and Improvements	2,435,000
Total	2,738,000
Accumulated Depreciation	1,143,000
Year Acquired	2001
Year Constructed	2003
Industrial [Member] | TENNESSEE [Member] | Memphis [Member] | Air Park Distribution Center I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	250,000
Buildings and Improvements	1,916,000
Costs Capitalized Subsequent to Acquisition	851,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	250,000
Buildings and Improvements	2,767,000
Total	3,017,000
Accumulated Depreciation	1,276,000
Year Acquired	1998
Year Constructed	1975
Industrial [Member] | OKLAHOMA [Member] | Oklahoma City [Member] | Northpointe Commerce Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	777,000
Buildings and Improvements	3,113,000
Costs Capitalized Subsequent to Acquisition	788,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	998,000
Buildings and Improvements	3,680,000
Total	4,678,000
Accumulated Depreciation	1,499,000
Year Acquired	1998
Year Constructed	1996/97
Industrial [Member] | OKLAHOMA [Member] | Tulsa [Member] | Braniff Park West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,066,000
Buildings and Improvements	4,641,000
Costs Capitalized Subsequent to Acquisition	3,425,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,066,000
Buildings and Improvements	8,066,000
Total	9,132,000
Accumulated Depreciation	4,070,000
Year Acquired	1996
Year Constructed	1974
Industrial Development [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	422,000
Initial Cost to the Company [Abstract]
Land	59,868,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	52,281,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	61,595,000
Buildings and Improvements	50,554,000
Total	112,149,000
Accumulated Depreciation	50,000
Industrial Development [Member] | FLORIDA [Member] | Oak Creek land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,946,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,540,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,374,000
Buildings and Improvements	2,112,000
Total	4,486,000
Accumulated Depreciation	0
Year Acquired	2005
Industrial Development [Member] | FLORIDA [Member] | Southridge land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	927,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,140,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	927,000
Buildings and Improvements	3,140,000
Total	4,067,000
Accumulated Depreciation	0
Year Acquired	2003
Industrial Development [Member] | FLORIDA [Member] | Horizon land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	14,072,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,458,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	14,157,000
Buildings and Improvements	6,373,000
Total	20,530,000
Accumulated Depreciation	0
Year Acquired	2008/09
Industrial Development [Member] | FLORIDA [Member] | SunCoast land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	10,926,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	6,277,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	11,105,000
Buildings and Improvements	6,098,000
Total	17,203,000
Accumulated Depreciation	0
Year Acquired	2006
Industrial Development [Member] | FLORIDA [Member] | Southridge IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	468,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,894,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	468,000
Buildings and Improvements	4,894,000
Total	5,362,000
Accumulated Depreciation	0
Year Acquired	2003
Industrial Development [Member] | TEXAS [Member] | North Stemmons land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	422,000
Initial Cost to the Company [Abstract]
Land	537,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	227,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	537,000
Buildings and Improvements	227,000
Total	764,000
Accumulated Depreciation	0
Year Acquired	2001
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,407,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,878,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,407,000
Buildings and Improvements	1,878,000
Total	4,285,000
Accumulated Depreciation	0
Year Acquired	2000/05/06
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing Phase II land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	690,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	372,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	690,000
Buildings and Improvements	372,000
Total	1,062,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | TEXAS [Member] | Lee Road land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	3,068,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,093,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,822,000
Buildings and Improvements	1,339,000
Total	5,161,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | TEXAS [Member] | Americas Ten Business Center II and III land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,365,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,079,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,365,000
Buildings and Improvements	1,079,000
Total	2,444,000
Accumulated Depreciation	0
Year Acquired	2001
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	2,288,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,666,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	2,288,000
Buildings and Improvements	1,666,000
Total	3,954,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	772,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	290,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	772,000
Buildings and Improvements	290,000
Total	1,062,000
Accumulated Depreciation	0
Year Acquired	2008
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing VIII [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	721,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	4,478,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	721,000
Buildings and Improvements	4,478,000
Total	5,199,000
Accumulated Depreciation	0
Year Acquired	2005
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing IX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	418,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	723,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	418,000
Buildings and Improvements	723,000
Total	1,141,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	607,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,802,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	607,000
Buildings and Improvements	1,802,000
Total	2,409,000
Accumulated Depreciation	0
Year Acquired	2008
Industrial Development [Member] | TEXAS [Member] | Thousand Oaks II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	794,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	2,370,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	794,000
Buildings and Improvements	2,370,000
Total	3,164,000
Accumulated Depreciation	0
Year Acquired	2008
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr 31A [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	684,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	3,159,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	684,000
Buildings and Improvements	3,159,000
Total	3,843,000
Accumulated Depreciation	50,000
Year Acquired	2008
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr 31B [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	546,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	814,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	546,000
Buildings and Improvements	814,000
Total	1,360,000
Accumulated Depreciation	0
Year Acquired	2008
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr 32 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	1,146,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	5,064,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	1,427,000
Buildings and Improvements	4,783,000
Total	6,210,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land-expansion [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	10,071,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	536,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	10,071,000
Buildings and Improvements	536,000
Total	10,607,000
Accumulated Depreciation	0
Year Acquired	2011
Industrial Development [Member] | TEXAS [Member] | Beltway Crossing X [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	733,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	1,273,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	733,000
Buildings and Improvements	1,273,000
Total	2,006,000
Accumulated Depreciation	0
Year Acquired	2007
Industrial Development [Member] | ARIZONA [Member] | Airport Distribution Center II land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	300,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	117,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	300,000
Buildings and Improvements	117,000
Total	417,000
Accumulated Depreciation	0
Year Acquired	2000
Industrial Development [Member] | ARIZONA [Member] | Kyrene Land Member
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	3,220,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	241,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	3,220,000
Buildings and Improvements	241,000
Total	3,461,000
Accumulated Depreciation	0
Year Acquired	2011
Industrial Development [Member] | NORTH CAROLINA [Member] | Airport Commerce Center III land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	855,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	391,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	855,000
Buildings and Improvements	391,000
Total	1,246,000
Accumulated Depreciation	0
Year Acquired	2008
Industrial Development [Member] | MISSISSIPPI [Member] | Metro Airport Commerce Center II land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to the Company [Abstract]
Land	307,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition	399,000
Gross Amount at which Carried at Close of Period [Abstract]
Land	307,000
Buildings and Improvements	399,000
Total	706,000
Accumulated Depreciation	$ 0
Year Acquired	2001