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SCHEDULE III (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [1],[2] $ 351,401      
Initial Cost to the Company [Abstract]        
Land [1],[2] 367,042      
Buildings and Improvements [1],[2] 965,253      
Costs Capitalized Subsequent to Acquisition [1],[2] 887,153      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [1],[2] 372,088      
Buildings and Improvements [1],[2] 1,847,360      
Total [3] 2,219,448 [1],[2] $ 2,074,946 $ 1,927,326 $ 1,768,032
Accumulated Depreciation $ 657,454 [1],[2] $ 600,526 $ 550,113 $ 496,247
Year Constructed 1998      
Industrial [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 351,401      
Initial Cost to the Company [Abstract]        
Land [4] 298,884      
Buildings and Improvements [4] 965,253      
Costs Capitalized Subsequent to Acquisition [4] 784,870      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 301,435      
Buildings and Improvements [4] 1,747,572      
Total [4] 2,049,007      
Accumulated Depreciation [4] 657,292      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | 56th Street Commerce Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] 0      
Initial Cost to the Company [Abstract]        
Land [4] 843      
Buildings and Improvements [4] 3,567      
Costs Capitalized Subsequent to Acquisition [4] 4,324      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 843      
Buildings and Improvements [4] 7,891      
Total [4] 8,734      
Accumulated Depreciation [4] $ 5,568      
Year Acquired [4] 1993      
Year Constructed [4] 1981/86/97      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Jetport Commerce Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,575      
Buildings and Improvements [4] 6,591      
Costs Capitalized Subsequent to Acquisition [4] 5,738      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,575      
Buildings and Improvements [4] 12,329      
Total [4] 13,904      
Accumulated Depreciation [4] $ 7,654      
Year Acquired [4] 1993-99      
Year Constructed [4] 1974-85      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westport Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 980      
Buildings and Improvements [4] 3,800      
Costs Capitalized Subsequent to Acquisition [4] 2,611      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 980      
Buildings and Improvements [4] 6,411      
Total [4] 7,391      
Accumulated Depreciation [4] $ 4,281      
Year Acquired [4] 1994      
Year Constructed [4] 1983/87      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center I and II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 843      
Buildings and Improvements [4] 3,963      
Costs Capitalized Subsequent to Acquisition [4] 1,490      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 883      
Buildings and Improvements [4] 5,413      
Total [4] 6,296      
Accumulated Depreciation [4] $ 3,481      
Year Acquired [4] 1997      
Year Constructed [4] 1996      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Benjamin Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 407      
Buildings and Improvements [4] 1,503      
Costs Capitalized Subsequent to Acquisition [4] 482      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 407      
Buildings and Improvements [4] 1,985      
Total [4] 2,392      
Accumulated Depreciation [4] $ 1,485      
Year Acquired [4] 1999      
Year Constructed [4] 1988      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,190      
Buildings and Improvements [4] 4,625      
Costs Capitalized Subsequent to Acquisition [4] 2,493      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,190      
Buildings and Improvements [4] 7,118      
Total [4] 8,308      
Accumulated Depreciation [4] $ 4,330      
Year Acquired [4] 1997/98      
Year Constructed [4] 1990/97/98      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North I and III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,005      
Buildings and Improvements [4] 4,688      
Costs Capitalized Subsequent to Acquisition [4] 2,295      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,005      
Buildings and Improvements [4] 6,983      
Total [4] 7,988      
Accumulated Depreciation [4] $ 3,887      
Year Acquired [4] 1998      
Year Constructed [4] 2000      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River North II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 634      
Buildings and Improvements [4] 4,418      
Costs Capitalized Subsequent to Acquisition [4] 381      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 634      
Buildings and Improvements [4] 4,799      
Total [4] 5,433      
Accumulated Depreciation [4] $ 3,254      
Year Acquired [4] 1997/98      
Year Constructed [4] 1999      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 655      
Buildings and Improvements [4] 3,187      
Costs Capitalized Subsequent to Acquisition [4] 619      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 655      
Buildings and Improvements [4] 3,806      
Total [4] 4,461      
Accumulated Depreciation [4] $ 1,607      
Year Acquired [4] 2000      
Year Constructed [4] 2005      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Palm River South II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 655      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,360      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 655      
Buildings and Improvements [4] 4,360      
Total [4] 5,015      
Accumulated Depreciation [4] $ 1,951      
Year Acquired [4] 2000      
Year Constructed [4] 2006      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 337      
Buildings and Improvements [4] 3,318      
Costs Capitalized Subsequent to Acquisition [4] 498      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 337      
Buildings and Improvements [4] 3,816      
Total [4] 4,153      
Accumulated Depreciation [4] $ 1,920      
Year Acquired [4] 1997/98      
Year Constructed [4] 2001      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Walden Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 465      
Buildings and Improvements [4] 3,738      
Costs Capitalized Subsequent to Acquisition [4] 981      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 465      
Buildings and Improvements [4] 4,719      
Total [4] 5,184      
Accumulated Depreciation [4] $ 2,517      
Year Acquired [4] 1998      
Year Constructed [4] 1998      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,109      
Buildings and Improvements [4] 6,126      
Costs Capitalized Subsequent to Acquisition [4] 1,364      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,109      
Buildings and Improvements [4] 7,490      
Total [4] 8,599      
Accumulated Depreciation [4] $ 3,504      
Year Acquired [4] 1998      
Year Constructed [4] 1998      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 647      
Buildings and Improvements [4] 3,603      
Costs Capitalized Subsequent to Acquisition [4] 1,104      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 647      
Buildings and Improvements [4] 4,707      
Total [4] 5,354      
Accumulated Depreciation [4] $ 2,193      
Year Acquired [4] 2003      
Year Constructed [4] 2001      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 439      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,178      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 556      
Buildings and Improvements [4] 3,061      
Total [4] 3,617      
Accumulated Depreciation [4] $ 1,020      
Year Acquired [4] 2005      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 682      
Buildings and Improvements [4] 6,472      
Costs Capitalized Subsequent to Acquisition [4] 669      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 682      
Buildings and Improvements [4] 7,141      
Total [4] 7,823      
Accumulated Depreciation [4] $ 2,271      
Year Acquired [4] 2005      
Year Constructed [4] 2001      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center V [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 724      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,817      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 916      
Buildings and Improvements [4] 5,625      
Total [4] 6,541      
Accumulated Depreciation [4] $ 1,932      
Year Acquired [4] 2005      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 642      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,039      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 812      
Buildings and Improvements [4] 4,869      
Total [4] 5,681      
Accumulated Depreciation [4] $ 1,318      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center VIII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 843      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,188      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,051      
Buildings and Improvements [4] 5,980      
Total [4] 7,031      
Accumulated Depreciation [4] $ 15      
Year Acquired [4] 2005      
Year Constructed [4] 2015      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center IX [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 618      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,962      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 780      
Buildings and Improvements [4] 4,800      
Total [4] 5,580      
Accumulated Depreciation [4] $ 1,068      
Year Acquired [4] 2005      
Year Constructed [4] 2009      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center A [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 185      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 1,492      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 185      
Buildings and Improvements [4] 1,492      
Total [4] 1,677      
Accumulated Depreciation [4] $ 395      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Oak Creek Distribution Center B [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 227      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 1,497      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 227      
Buildings and Improvements [4] 1,497      
Total [4] 1,724      
Accumulated Depreciation [4] $ 392      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Airport Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,257      
Buildings and Improvements [4] 4,012      
Costs Capitalized Subsequent to Acquisition [4] 923      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,257      
Buildings and Improvements [4] 4,935      
Total [4] 6,192      
Accumulated Depreciation [4] $ 2,453      
Year Acquired [4] 1998      
Year Constructed [4] 1998      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Westlake Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,333      
Buildings and Improvements [4] 6,998      
Costs Capitalized Subsequent to Acquisition [4] 2,150      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,333      
Buildings and Improvements [4] 9,148      
Total [4] 10,481      
Accumulated Depreciation [4] $ 4,851      
Year Acquired [4] 1998      
Year Constructed [4] 1998/99      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 915      
Buildings and Improvements [4] 5,346      
Costs Capitalized Subsequent to Acquisition [4] 1,044      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 915      
Buildings and Improvements [4] 6,390      
Total [4] 7,305      
Accumulated Depreciation [4] $ 2,997      
Year Acquired [4] 2002      
Year Constructed [4] 2004      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Expressway Commerce Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,013      
Buildings and Improvements [4] 3,247      
Costs Capitalized Subsequent to Acquisition [4] 385      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,013      
Buildings and Improvements [4] 3,632      
Total [4] 4,645      
Accumulated Depreciation [4] $ 1,743      
Year Acquired [4] 2003      
Year Constructed [4] 2001      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Silo Bend Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 4,131      
Buildings and Improvements [4] 27,497      
Costs Capitalized Subsequent to Acquisition [4] 1,149      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 4,131      
Buildings and Improvements [4] 28,646      
Total [4] 32,777      
Accumulated Depreciation [4] $ 4,284      
Year Acquired [4] 2011      
Year Constructed [4] 1987/90      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa East Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 791      
Buildings and Improvements [4] 4,758      
Costs Capitalized Subsequent to Acquisition [4] 458      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 791      
Buildings and Improvements [4] 5,216      
Total [4] 6,007      
Accumulated Depreciation [4] $ 906      
Year Acquired [4] 2011      
Year Constructed [4] 1984      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Tampa West Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,139      
Buildings and Improvements [4] 8,502      
Costs Capitalized Subsequent to Acquisition [4] 1,052      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,140      
Buildings and Improvements [4] 9,553      
Total [4] 11,693      
Accumulated Depreciation [4] $ 1,626      
Year Acquired [4] 2011      
Year Constructed [4] 1975/93/94      
Industrial [Member] | FLORIDA [Member] | Tampa [Member] | Madison Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 495      
Buildings and Improvements [4] 2,779      
Costs Capitalized Subsequent to Acquisition [4] 381      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 495      
Buildings and Improvements [4] 3,160      
Total [4] 3,655      
Accumulated Depreciation [4] $ 521      
Year Acquired [4] 2012      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Chancellor Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 291      
Buildings and Improvements [4] 1,711      
Costs Capitalized Subsequent to Acquisition [4] 252      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 291      
Buildings and Improvements [4] 1,963      
Total [4] 2,254      
Accumulated Depreciation [4] $ 1,122      
Year Acquired [4] 1996/97      
Year Constructed [4] 1996/97      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 603      
Buildings and Improvements [4] 2,414      
Costs Capitalized Subsequent to Acquisition [4] 2,135      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 603      
Buildings and Improvements [4] 4,549      
Total [4] 5,152      
Accumulated Depreciation [4] $ 3,059      
Year Acquired [4] 1994      
Year Constructed [4] 1975      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 300      
Buildings and Improvements [4] 945      
Costs Capitalized Subsequent to Acquisition [4] 298      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 300      
Buildings and Improvements [4] 1,243      
Total [4] 1,543      
Accumulated Depreciation [4] $ 675      
Year Acquired [4] 2002      
Year Constructed [4] 1976      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Exchange Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 320      
Buildings and Improvements [4] 997      
Costs Capitalized Subsequent to Acquisition [4] 403      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 320      
Buildings and Improvements [4] 1,400      
Total [4] 1,720      
Accumulated Depreciation [4] $ 811      
Year Acquired [4] 2002      
Year Constructed [4] 1980      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunbelt Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,474      
Buildings and Improvements [4] 5,745      
Costs Capitalized Subsequent to Acquisition [4] 5,757      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,474      
Buildings and Improvements [4] 11,502      
Total [4] 12,976      
Accumulated Depreciation [4] $ 7,803      
Year Acquired [4] 1989/97/98      
Year Constructed [4] 1974/87/97/98      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 497      
Buildings and Improvements [4] 2,444      
Costs Capitalized Subsequent to Acquisition [4] 931      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 497      
Buildings and Improvements [4] 3,375      
Total [4] 3,872      
Accumulated Depreciation [4] $ 1,804      
Year Acquired [4] 1997/98      
Year Constructed [4] 1997/98      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | John Young Commerce Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 512      
Buildings and Improvements [4] 3,613      
Costs Capitalized Subsequent to Acquisition [4] 489      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 512      
Buildings and Improvements [4] 4,102      
Total [4] 4,614      
Accumulated Depreciation [4] $ 2,415      
Year Acquired [4] 1998      
Year Constructed [4] 1999      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,498      
Buildings and Improvements [4] 2,661      
Costs Capitalized Subsequent to Acquisition [4] 2,585      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,498      
Buildings and Improvements [4] 5,246      
Total [4] 6,744      
Accumulated Depreciation [4] $ 3,560      
Year Acquired [4] 1999      
Year Constructed [4] 1980/82      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Altamonte Commerce Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 745      
Buildings and Improvements [4] 2,618      
Costs Capitalized Subsequent to Acquisition [4] 1,196      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 745      
Buildings and Improvements [4] 3,814      
Total [4] 4,559      
Accumulated Depreciation [4] $ 1,948      
Year Acquired [4] 2003      
Year Constructed [4] 1975      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 555      
Buildings and Improvements [4] 1,977      
Costs Capitalized Subsequent to Acquisition [4] 708      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 555      
Buildings and Improvements [4] 2,685      
Total [4] 3,240      
Accumulated Depreciation [4] $ 1,364      
Year Acquired [4] 1999      
Year Constructed [4] 1999      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 597      
Buildings and Improvements [4] 3,271      
Costs Capitalized Subsequent to Acquisition [4] 1,501      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 597      
Buildings and Improvements [4] 4,772      
Total [4] 5,369      
Accumulated Depreciation [4] $ 3,165      
Year Acquired [4] 1999      
Year Constructed [4] 2001      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 642      
Buildings and Improvements [4] 3,121      
Costs Capitalized Subsequent to Acquisition [4] 1,029      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 642      
Buildings and Improvements [4] 4,150      
Total [4] 4,792      
Accumulated Depreciation [4] $ 1,940      
Year Acquired [4] 1999      
Year Constructed [4] 2002      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 642      
Buildings and Improvements [4] 2,917      
Costs Capitalized Subsequent to Acquisition [4] 1,474      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 642      
Buildings and Improvements [4] 4,391      
Total [4] 5,033      
Accumulated Depreciation [4] $ 1,953      
Year Acquired [4] 1999      
Year Constructed [4] 2004      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center V [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 750      
Buildings and Improvements [4] 2,509      
Costs Capitalized Subsequent to Acquisition [4] 2,183      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 750      
Buildings and Improvements [4] 4,692      
Total [4] 5,442      
Accumulated Depreciation [4] $ 2,478      
Year Acquired [4] 1999      
Year Constructed [4] 2005      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Sunport Center VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 672      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,472      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 672      
Buildings and Improvements [4] 3,472      
Total [4] 4,144      
Accumulated Depreciation [4] $ 1,186      
Year Acquired [4] 1999      
Year Constructed [4] 2006      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,822      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 4,822      
Total [4] 5,195      
Accumulated Depreciation [4] $ 2,555      
Year Acquired [4] 2003      
Year Constructed [4] 2006      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 342      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,421      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 342      
Buildings and Improvements [4] 4,421      
Total [4] 4,763      
Accumulated Depreciation [4] $ 2,001      
Year Acquired [4] 2003      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 547      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,538      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 547      
Buildings and Improvements [4] 5,538      
Total [4] 6,085      
Accumulated Depreciation [4] $ 1,809      
Year Acquired [4] 2003      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 3,102      
Initial Cost to the Company [Abstract]        
Land [4],[5] 506      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 4,584      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 506      
Buildings and Improvements [4],[5] 4,584      
Total [4],[5] 5,090      
Accumulated Depreciation [4],[5] $ 1,588      
Year Acquired [4],[5] 2003      
Year Constructed [4],[5] 2006      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park V [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 2,980      
Initial Cost to the Company [Abstract]        
Land [4],[5] 382      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 4,508      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 382      
Buildings and Improvements [4],[5] 4,508      
Total [4],[5] 4,890      
Accumulated Depreciation [4],[5] $ 1,828      
Year Acquired [4],[5] 2003      
Year Constructed [4],[5] 2006      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 571      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,182      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 571      
Buildings and Improvements [4] 5,182      
Total [4] 5,753      
Accumulated Depreciation [4] $ 1,527      
Year Acquired [4] 2003      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 520      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,727      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 520      
Buildings and Improvements [4] 6,727      
Total [4] 7,247      
Accumulated Depreciation [4] $ 1,932      
Year Acquired [4] 2003      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park VIII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 531      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,343      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 531      
Buildings and Improvements [4] 6,343      
Total [4] 6,874      
Accumulated Depreciation [4] $ 1,588      
Year Acquired [4] 2003      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park IX [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 468      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,413      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 468      
Buildings and Improvements [4] 6,413      
Total [4] 6,881      
Accumulated Depreciation [4] $ 867      
Year Acquired [4] 2003      
Year Constructed [4] 2012      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park X [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 414      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,826      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 414      
Buildings and Improvements [4] 4,826      
Total [4] 5,240      
Accumulated Depreciation [4] $ 415      
Year Acquired [4] 2003      
Year Constructed [4] 2012      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park XI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 513      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,870      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 513      
Buildings and Improvements [4] 5,870      
Total [4] 6,383      
Accumulated Depreciation [4] $ 653      
Year Acquired [4] 2003      
Year Constructed [4] 2012      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Southridge Commerce Park XII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,025      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 16,930      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,025      
Buildings and Improvements [4] 16,930      
Total [4] 18,955      
Accumulated Depreciation [4] $ 3,763      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Horizon I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 991      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,464      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 991      
Buildings and Improvements [4] 6,464      
Total [4] 7,455      
Accumulated Depreciation [4] $ 300      
Year Acquired [4] 2008      
Year Constructed [4] 2014      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Horizon II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,111      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 7,114      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,111      
Buildings and Improvements [4] 7,114      
Total [4] 8,225      
Accumulated Depreciation [4] $ 249      
Year Acquired [4] 2008      
Year Constructed [4] 2014      
Industrial [Member] | FLORIDA [Member] | Orlando [Member] | Horizon IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,097      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 8,131      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,097      
Buildings and Improvements [4] 8,131      
Total [4] 9,228      
Accumulated Depreciation [4] $ 0      
Year Acquired [4] 2008      
Year Constructed [4] 2015      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Deerwood Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,147      
Buildings and Improvements [4] 1,799      
Costs Capitalized Subsequent to Acquisition [4] 2,929      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,147      
Buildings and Improvements [4] 4,728      
Total [4] 5,875      
Accumulated Depreciation [4] $ 2,572      
Year Acquired [4] 1989      
Year Constructed [4] 1978      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Phillips Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,375      
Buildings and Improvements [4] 2,961      
Costs Capitalized Subsequent to Acquisition [4] 4,317      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,375      
Buildings and Improvements [4] 7,278      
Total [4] 8,653      
Accumulated Depreciation [4] $ 4,929      
Year Acquired [4] 1994      
Year Constructed [4] 1984/95      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Lake Pointe Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 3,442      
Buildings and Improvements [4] 6,450      
Costs Capitalized Subsequent to Acquisition [4] 7,607      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 3,442      
Buildings and Improvements [4] 14,057      
Total [4] 17,499      
Accumulated Depreciation [4] $ 9,915      
Year Acquired [4] 1993      
Year Constructed [4] 1986/87      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Ellis Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 540      
Buildings and Improvements [4] 7,513      
Costs Capitalized Subsequent to Acquisition [4] 1,149      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 540      
Buildings and Improvements [4] 8,662      
Total [4] 9,202      
Accumulated Depreciation [4] $ 4,266      
Year Acquired [4] 1997      
Year Constructed [4] 1977      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Westside Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,011      
Buildings and Improvements [4] 15,374      
Costs Capitalized Subsequent to Acquisition [4] 7,139      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,011      
Buildings and Improvements [4] 22,513      
Total [4] 24,524      
Accumulated Depreciation [4] $ 10,675      
Year Acquired [4] 1997/2008      
Year Constructed [4] 1984/85      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Beach Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 476      
Buildings and Improvements [4] 1,899      
Costs Capitalized Subsequent to Acquisition [4] 634      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 476      
Buildings and Improvements [4] 2,533      
Total [4] 3,009      
Accumulated Depreciation [4] $ 1,270      
Year Acquired [4] 2000      
Year Constructed [4] 2000      
Industrial [Member] | FLORIDA [Member] | Jacksonville [Member] | Interstate Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,879      
Buildings and Improvements [4] 5,700      
Costs Capitalized Subsequent to Acquisition [4] 1,682      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,879      
Buildings and Improvements [4] 7,382      
Total [4] 9,261      
Accumulated Depreciation [4] $ 3,436      
Year Acquired [4] 2005      
Year Constructed [4] 1990      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Linpro Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 613      
Buildings and Improvements [4] 2,243      
Costs Capitalized Subsequent to Acquisition [4] 1,775      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 616      
Buildings and Improvements [4] 4,015      
Total [4] 4,631      
Accumulated Depreciation [4] $ 3,023      
Year Acquired [4] 1996      
Year Constructed [4] 1986      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Cypress Creek Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 2,465      
Costs Capitalized Subsequent to Acquisition [4] 1,853      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 4,318      
Total [4] 4,318      
Accumulated Depreciation [4] $ 2,710      
Year Acquired [4] 1997      
Year Constructed [4] 1986      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Lockhart Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 3,489      
Costs Capitalized Subsequent to Acquisition [4] 2,828      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 6,317      
Total [4] 6,317      
Accumulated Depreciation [4] $ 3,795      
Year Acquired [4] 1997      
Year Constructed [4] 1986      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Interstate Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 485      
Buildings and Improvements [4] 2,652      
Costs Capitalized Subsequent to Acquisition [4] 786      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 485      
Buildings and Improvements [4] 3,438      
Total [4] 3,923      
Accumulated Depreciation [4] $ 2,137      
Year Acquired [4] 1998      
Year Constructed [4] 1988      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Executive Airport Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 7,990      
Initial Cost to the Company [Abstract]        
Land [4],[6] 1,991      
Buildings and Improvements [4],[6] 4,857      
Costs Capitalized Subsequent to Acquisition [4],[6] 5,108      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 1,991      
Buildings and Improvements [4],[6] 9,965      
Total [4],[6] 11,956      
Accumulated Depreciation [4],[6] $ 4,361      
Year Acquired [4],[6] 2001      
Year Constructed [4],[6] 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 [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,202      
Buildings and Improvements [4] 8,785      
Costs Capitalized Subsequent to Acquisition [4] 3,052      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,202      
Buildings and Improvements [4] 11,837      
Total [4] 14,039      
Accumulated Depreciation [4] $ 7,242      
Year Acquired [4] 1996/98      
Year Constructed [4] 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 [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 975      
Buildings and Improvements [4] 3,626      
Costs Capitalized Subsequent to Acquisition [4] 1,850      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 975      
Buildings and Improvements [4] 5,476      
Total [4] 6,451      
Accumulated Depreciation [4] $ 3,245      
Year Acquired [4] 1999      
Year Constructed [4] 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 [4] $ 735      
Initial Cost to the Company [Abstract]        
Land [4] 1,385      
Buildings and Improvements [4] 4,222      
Costs Capitalized Subsequent to Acquisition [4] 809      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,385      
Buildings and Improvements [4] 5,031      
Total [4] 6,416      
Accumulated Depreciation [4] $ 2,242      
Year Acquired [4] 2004      
Year Constructed [4] 1988      
Industrial [Member] | FLORIDA [Member] | Fort Lauderdale/Palm Beach area [Member] | Blue Heron Distribution Center III        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 450      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,664      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 450      
Buildings and Improvements [4] 2,664      
Total [4] 3,114      
Accumulated Depreciation [4] $ 772      
Year Acquired [4] 2004      
Year Constructed [4] 2009      
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 911      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,768      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 928      
Buildings and Improvements [4] 4,751      
Total [4] 5,679      
Accumulated Depreciation [4] $ 1,471      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 911      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,952      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 928      
Buildings and Improvements [4] 4,935      
Total [4] 5,863      
Accumulated Depreciation [4] $ 1,705      
Year Acquired [4] 2005      
Year Constructed [4] 2007      
Industrial [Member] | FLORIDA [Member] | Fort Myers [Member] | SunCoast Commerce Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,720      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,556      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,763      
Buildings and Improvements [4] 6,513      
Total [4] 8,276      
Accumulated Depreciation [4] $ 1,746      
Year Acquired [4] 2006      
Year Constructed [4] 2008      
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Wiegman Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[7] $ 9,409      
Initial Cost to the Company [Abstract]        
Land [4],[7] 2,197      
Buildings and Improvements [4],[7] 8,788      
Costs Capitalized Subsequent to Acquisition [4],[7] 1,948      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[7] 2,308      
Buildings and Improvements [4],[7] 10,625      
Total [4],[7] 12,933      
Accumulated Depreciation [4],[7] $ 5,548      
Year Acquired [4],[7] 1996      
Year Constructed [4],[7] 1986/87      
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Wiegman Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,579      
Buildings and Improvements [4] 4,316      
Costs Capitalized Subsequent to Acquisition [4] 110      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,579      
Buildings and Improvements [4] 4,426      
Total [4] 7,005      
Accumulated Depreciation [4] $ 434      
Year Acquired [4] 2012      
Year Constructed [4] 1998      
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Huntwood Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[7] $ 16,158      
Initial Cost to the Company [Abstract]        
Land [4],[7] 3,842      
Buildings and Improvements [4],[7] 15,368      
Costs Capitalized Subsequent to Acquisition [4],[7] 2,987      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[7] 3,842      
Buildings and Improvements [4],[7] 18,355      
Total [4],[7] 22,197      
Accumulated Depreciation [4],[7] $ 9,591      
Year Acquired [4],[7] 1996      
Year Constructed [4],[7] 1988      
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | San Clemente Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 893      
Buildings and Improvements [4] 2,004      
Costs Capitalized Subsequent to Acquisition [4] 852      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 893      
Buildings and Improvements [4] 2,856      
Total [4] 3,749      
Accumulated Depreciation [4] $ 1,622      
Year Acquired [4] 1997      
Year Constructed [4] 1978      
Industrial [Member] | CALIFORNIA [Member] | San Francisco area [Member] | Yosemite Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 259      
Buildings and Improvements [4] 7,058      
Costs Capitalized Subsequent to Acquisition [4] 1,329      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 259      
Buildings and Improvements [4] 8,387      
Total [4] 8,646      
Accumulated Depreciation [4] $ 4,213      
Year Acquired [4] 1999      
Year Constructed [4] 1974/87      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Kingsview Industrial Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 2,605      
Initial Cost to the Company [Abstract]        
Land [4],[8] 643      
Buildings and Improvements [4],[8] 2,573      
Costs Capitalized Subsequent to Acquisition [4],[8] 615      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 643      
Buildings and Improvements [4],[8] 3,188      
Total [4],[8] 3,831      
Accumulated Depreciation [4],[8] $ 1,748      
Year Acquired [4],[8] 1996      
Year Constructed [4],[8] 1980      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Dominguez Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 7,615      
Initial Cost to the Company [Abstract]        
Land [4],[8] 2,006      
Buildings and Improvements [4],[8] 8,025      
Costs Capitalized Subsequent to Acquisition [4],[8] 1,170      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 2,006      
Buildings and Improvements [4],[8] 9,195      
Total [4],[8] 11,201      
Accumulated Depreciation [4],[8] $ 5,128      
Year Acquired [4],[8] 1996      
Year Constructed [4],[8] 1977      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Main Street Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,606      
Buildings and Improvements [4] 4,103      
Costs Capitalized Subsequent to Acquisition [4] 787      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,606      
Buildings and Improvements [4] 4,890      
Total [4] 6,496      
Accumulated Depreciation [4] $ 2,519      
Year Acquired [4] 1999      
Year Constructed [4] 1999      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Walnut Business Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 6,604      
Initial Cost to the Company [Abstract]        
Land [4],[8] 2,885      
Buildings and Improvements [4],[8] 5,274      
Costs Capitalized Subsequent to Acquisition [4],[8] 1,555      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 2,885      
Buildings and Improvements [4],[8] 6,829      
Total [4],[8] 9,714      
Accumulated Depreciation [4],[8] $ 3,512      
Year Acquired [4],[8] 1996      
Year Constructed [4],[8] 1966/90      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Washington Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 4,891      
Initial Cost to the Company [Abstract]        
Land [4],[8] 1,636      
Buildings and Improvements [4],[8] 4,900      
Costs Capitalized Subsequent to Acquisition [4],[8] 658      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 1,636      
Buildings and Improvements [4],[8] 5,558      
Total [4],[8] 7,194      
Accumulated Depreciation [4],[8] $ 2,838      
Year Acquired [4],[8] 1997      
Year Constructed [4],[8] 1996/97      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chino Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 8,774      
Initial Cost to the Company [Abstract]        
Land [4],[9] 2,544      
Buildings and Improvements [4],[9] 10,175      
Costs Capitalized Subsequent to Acquisition [4],[9] 1,623      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 2,544      
Buildings and Improvements [4],[9] 11,798      
Total [4],[9] 14,342      
Accumulated Depreciation [4],[9] $ 6,987      
Year Acquired [4],[9] 1998      
Year Constructed [4],[9] 1980      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Ramona Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 2,757      
Initial Cost to the Company [Abstract]        
Land [4] 3,761      
Buildings and Improvements [4] 5,751      
Costs Capitalized Subsequent to Acquisition [4] 3      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 3,761      
Buildings and Improvements [4] 5,754      
Total [4] 9,515      
Accumulated Depreciation [4] $ 171      
Year Acquired [4] 2014      
Year Constructed [4] 1984      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 18,306      
Initial Cost to the Company [Abstract]        
Land [4],[8] 10,230      
Buildings and Improvements [4],[8] 12,373      
Costs Capitalized Subsequent to Acquisition [4],[8] 4,323      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 10,230      
Buildings and Improvements [4],[8] 16,696      
Total [4],[8] 26,926      
Accumulated Depreciation [4],[8] $ 7,547      
Year Acquired [4],[8] 1998      
Year Constructed [4],[8] 1959      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Industry Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 1,941      
Initial Cost to the Company [Abstract]        
Land [4],[8] 0      
Buildings and Improvements [4],[8] 3,012      
Costs Capitalized Subsequent to Acquisition [4],[8] (157)      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 0      
Buildings and Improvements [4],[8] 2,855      
Total [4],[8] 2,855      
Accumulated Depreciation [4],[8] $ 2,855      
Year Acquired [4],[8] 2007      
Year Constructed [4],[8] 1992      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Chestnut Business Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,674      
Buildings and Improvements [4] 3,465      
Costs Capitalized Subsequent to Acquisition [4] 220      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,674      
Buildings and Improvements [4] 3,685      
Total [4] 5,359      
Accumulated Depreciation [4] $ 1,723      
Year Acquired [4] 1998      
Year Constructed [4] 1999      
Industrial [Member] | CALIFORNIA [Member] | Los Angeles area [Member] | Los Angeles Corporate Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,363      
Buildings and Improvements [4] 5,453      
Costs Capitalized Subsequent to Acquisition [4] 3,056      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,363      
Buildings and Improvements [4] 8,509      
Total [4] 9,872      
Accumulated Depreciation [4] $ 5,176      
Year Acquired [4] 1996      
Year Constructed [4] 1986      
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | University Business Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 5,517      
Buildings and Improvements [4] 22,067      
Costs Capitalized Subsequent to Acquisition [4] 5,766      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 5,519      
Buildings and Improvements [4] 27,831      
Total [4] 33,350      
Accumulated Depreciation [4] $ 15,216      
Year Acquired [4] 1996      
Year Constructed [4] 1987/88      
Industrial [Member] | CALIFORNIA [Member] | Santa Barbara [Member] | Castilian Research Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,719      
Buildings and Improvements [4] 1,410      
Costs Capitalized Subsequent to Acquisition [4] 4,846      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,719      
Buildings and Improvements [4] 6,256      
Total [4] 8,975      
Accumulated Depreciation [4] $ 1,418      
Year Acquired [4] 2005      
Year Constructed [4] 2007      
Industrial [Member] | CALIFORNIA [Member] | Fresno [Member] | Shaw Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[8] $ 12,727      
Initial Cost to the Company [Abstract]        
Land [4],[8] 2,465      
Buildings and Improvements [4],[8] 11,627      
Costs Capitalized Subsequent to Acquisition [4],[8] 4,627      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[8] 2,465      
Buildings and Improvements [4],[8] 16,254      
Total [4],[8] 18,719      
Accumulated Depreciation [4],[8] $ 9,689      
Year Acquired [4],[8] 1998      
Year Constructed [4],[8] 1978/81/87      
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Eastlake Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 3,046      
Buildings and Improvements [4] 6,888      
Costs Capitalized Subsequent to Acquisition [4] 1,751      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 3,046      
Buildings and Improvements [4] 8,639      
Total [4] 11,685      
Accumulated Depreciation [4] $ 4,854      
Year Acquired [4] 1997      
Year Constructed [4] 1989      
Industrial [Member] | CALIFORNIA [Member] | San Diego [Member] | Ocean View Corporate Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 9,603      
Initial Cost to the Company [Abstract]        
Land [4],[6] 6,577      
Buildings and Improvements [4],[6] 7,105      
Costs Capitalized Subsequent to Acquisition [4],[6] 686      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 6,577      
Buildings and Improvements [4],[6] 7,791      
Total [4],[6] 14,368      
Accumulated Depreciation [4],[6] $ 2,143      
Year Acquired [4],[6] 2010      
Year Constructed [4],[6] 2005      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center I and II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 6,114      
Initial Cost to the Company [Abstract]        
Land [4],[10] 1,746      
Buildings and Improvements [4],[10] 4,941      
Costs Capitalized Subsequent to Acquisition [4],[10] 3,189      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 1,746      
Buildings and Improvements [4],[10] 8,130      
Total [4],[10] 9,876      
Accumulated Depreciation [4],[10] $ 5,562      
Year Acquired [4],[10] 1988      
Year Constructed [4],[10] 1978      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 2,488      
Initial Cost to the Company [Abstract]        
Land [4],[10] 519      
Buildings and Improvements [4],[10] 2,008      
Costs Capitalized Subsequent to Acquisition [4],[10] 1,491      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 519      
Buildings and Improvements [4],[10] 3,499      
Total [4],[10] 4,018      
Accumulated Depreciation [4],[10] $ 1,650      
Year Acquired [4],[10] 2000      
Year Constructed [4],[10] 1979      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 416      
Buildings and Improvements [4] 2,481      
Costs Capitalized Subsequent to Acquisition [4] 456      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 416      
Buildings and Improvements [4] 2,937      
Total [4] 3,353      
Accumulated Depreciation [4] $ 1,337      
Year Acquired [4] 2004      
Year Constructed [4] 2002      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Interstate Distribution Center V, VI, VII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 4,646      
Initial Cost to the Company [Abstract]        
Land [4],[5] 1,824      
Buildings and Improvements [4],[5] 4,106      
Costs Capitalized Subsequent to Acquisition [4],[5] 1,694      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 1,824      
Buildings and Improvements [4],[5] 5,800      
Total [4],[5] 7,624      
Accumulated Depreciation [4],[5] $ 2,225      
Year Acquired [4],[5] 2009      
Year Constructed [4],[5] 1979/80/81      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Venture Warehouses [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 4,785      
Initial Cost to the Company [Abstract]        
Land [4],[10] 1,452      
Buildings and Improvements [4],[10] 3,762      
Costs Capitalized Subsequent to Acquisition [4],[10] 2,515      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 1,452      
Buildings and Improvements [4],[10] 6,277      
Total [4],[10] 7,729      
Accumulated Depreciation [4],[10] $ 4,628      
Year Acquired [4],[10] 1988      
Year Constructed [4],[10] 1979      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Stemmons Circle [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 1,899      
Initial Cost to the Company [Abstract]        
Land [4],[10] 363      
Buildings and Improvements [4],[10] 2,014      
Costs Capitalized Subsequent to Acquisition [4],[10] 690      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 363      
Buildings and Improvements [4],[10] 2,704      
Total [4],[10] 3,067      
Accumulated Depreciation [4],[10] $ 1,699      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1977      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 150      
Buildings and Improvements [4] 583      
Costs Capitalized Subsequent to Acquisition [4] 506      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 150      
Buildings and Improvements [4] 1,089      
Total [4] 1,239      
Accumulated Depreciation [4] $ 528      
Year Acquired [4] 2002      
Year Constructed [4] 1971      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | North Stemmons III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 380      
Buildings and Improvements [4] 2,066      
Costs Capitalized Subsequent to Acquisition [4] 48      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 380      
Buildings and Improvements [4] 2,114      
Total [4] 2,494      
Accumulated Depreciation [4] $ 571      
Year Acquired [4] 2007      
Year Constructed [4] 1974      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Shady Trail Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 635      
Buildings and Improvements [4] 3,621      
Costs Capitalized Subsequent to Acquisition [4] 1,094      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 635      
Buildings and Improvements [4] 4,715      
Total [4] 5,350      
Accumulated Depreciation [4] $ 2,032      
Year Acquired [4] 2003      
Year Constructed [4] 1998      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Valwood Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 4,361      
Buildings and Improvements [4] 34,405      
Costs Capitalized Subsequent to Acquisition [4] 1,788      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 4,361      
Buildings and Improvements [4] 36,193      
Total [4] 40,554      
Accumulated Depreciation [4] $ 4,819      
Year Acquired [4] 2012      
Year Constructed [4] 1986/87/97/98      
Industrial [Member] | TEXAS [Member] | Dallas [Member] | Northfield Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 12,471      
Buildings and Improvements [4] 50,713      
Costs Capitalized Subsequent to Acquisition [4] 1,357      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 12,470      
Buildings and Improvements [4] 52,071      
Total [4] 64,541      
Accumulated Depreciation [4] $ 6,834      
Year Acquired [4] 2013      
Year Constructed [4] 1999-2001/03/04/08      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Northwest Point Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,243      
Buildings and Improvements [4] 5,640      
Costs Capitalized Subsequent to Acquisition [4] 4,703      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,243      
Buildings and Improvements [4] 10,343      
Total [4] 11,586      
Accumulated Depreciation [4] $ 6,916      
Year Acquired [4] 1994      
Year Constructed [4] 1984/85      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Lockwood Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 749      
Buildings and Improvements [4] 5,444      
Costs Capitalized Subsequent to Acquisition [4] 1,985      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 749      
Buildings and Improvements [4] 7,429      
Total [4] 8,178      
Accumulated Depreciation [4] $ 4,209      
Year Acquired [4] 1997      
Year Constructed [4] 1968/69      
Industrial [Member] | TEXAS [Member] | Houston [Member] | West Loop Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 4,739      
Initial Cost to the Company [Abstract]        
Land [4],[10] 905      
Buildings and Improvements [4],[10] 4,383      
Costs Capitalized Subsequent to Acquisition [4],[10] 2,366      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 905      
Buildings and Improvements [4],[10] 6,749      
Total [4],[10] 7,654      
Accumulated Depreciation [4],[10] $ 4,149      
Year Acquired [4],[10] 1997/2000      
Year Constructed [4],[10] 1980      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 1 and 2 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 5,143      
Initial Cost to the Company [Abstract]        
Land [4],[9] 660      
Buildings and Improvements [4],[9] 5,893      
Costs Capitalized Subsequent to Acquisition [4],[9] 1,854      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 660      
Buildings and Improvements [4],[9] 7,747      
Total [4],[9] 8,407      
Accumulated Depreciation [4],[9] $ 4,212      
Year Acquired [4],[9] 1998      
Year Constructed [4],[9] 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 [4],[10] $ 5,343      
Initial Cost to the Company [Abstract]        
Land [4],[10] 1,025      
Buildings and Improvements [4],[10] 6,413      
Costs Capitalized Subsequent to Acquisition [4],[10] 1,193      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 1,025      
Buildings and Improvements [4],[10] 7,606      
Total [4],[10] 8,631      
Accumulated Depreciation [4],[10] $ 4,127      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1998      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 6 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 2,079      
Initial Cost to the Company [Abstract]        
Land [4],[10] 425      
Buildings and Improvements [4],[10] 2,423      
Costs Capitalized Subsequent to Acquisition [4],[10] 510      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 425      
Buildings and Improvements [4],[10] 2,933      
Total [4],[10] 3,358      
Accumulated Depreciation [4],[10] $ 1,663      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1998      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 7 and 8 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 5,840      
Initial Cost to the Company [Abstract]        
Land [4],[10] 680      
Buildings and Improvements [4],[10] 4,584      
Costs Capitalized Subsequent to Acquisition [4],[10] 4,170      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 680      
Buildings and Improvements [4],[10] 8,754      
Total [4],[10] 9,434      
Accumulated Depreciation [4],[10] $ 4,940      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1998      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 9 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 4,265      
Initial Cost to the Company [Abstract]        
Land [4],[10] 800      
Buildings and Improvements [4],[10] 4,355      
Costs Capitalized Subsequent to Acquisition [4],[10] 1,734      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 800      
Buildings and Improvements [4],[10] 6,089      
Total [4],[10] 6,889      
Accumulated Depreciation [4],[10] $ 2,544      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1998      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 10 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 933      
Buildings and Improvements [4] 4,779      
Costs Capitalized Subsequent to Acquisition [4] 349      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 933      
Buildings and Improvements [4] 5,128      
Total [4] 6,061      
Accumulated Depreciation [4] $ 2,209      
Year Acquired [4] 2001      
Year Constructed [4] 1999      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 11 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 638      
Buildings and Improvements [4] 3,764      
Costs Capitalized Subsequent to Acquisition [4] 1,195      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 638      
Buildings and Improvements [4] 4,959      
Total [4] 5,597      
Accumulated Depreciation [4] $ 2,515      
Year Acquired [4] 1999      
Year Constructed [4] 1999      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 12 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 340      
Buildings and Improvements [4] 2,419      
Costs Capitalized Subsequent to Acquisition [4] 383      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 340      
Buildings and Improvements [4] 2,802      
Total [4] 3,142      
Accumulated Depreciation [4] $ 1,477      
Year Acquired [4] 2000      
Year Constructed [4] 2002      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 13 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 282      
Buildings and Improvements [4] 2,569      
Costs Capitalized Subsequent to Acquisition [4] 374      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 282      
Buildings and Improvements [4] 2,943      
Total [4] 3,225      
Accumulated Depreciation [4] $ 1,784      
Year Acquired [4] 2000      
Year Constructed [4] 2002      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 14 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 722      
Buildings and Improvements [4] 2,629      
Costs Capitalized Subsequent to Acquisition [4] 535      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 722      
Buildings and Improvements [4] 3,164      
Total [4] 3,886      
Accumulated Depreciation [4] $ 1,600      
Year Acquired [4] 2000      
Year Constructed [4] 2003      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 15 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 731      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,124      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 731      
Buildings and Improvements [4] 6,124      
Total [4] 6,855      
Accumulated Depreciation [4] $ 2,904      
Year Acquired [4] 2000      
Year Constructed [4] 2007      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 16 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 3,373      
Initial Cost to the Company [Abstract]        
Land [4],[11] 519      
Buildings and Improvements [4],[11] 4,248      
Costs Capitalized Subsequent to Acquisition [4],[11] 1,144      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 519      
Buildings and Improvements [4],[11] 5,392      
Total [4],[11] 5,911      
Accumulated Depreciation [4],[11] $ 2,791      
Year Acquired [4],[11] 2000      
Year Constructed [4],[11] 2005      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 17 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 1,945      
Costs Capitalized Subsequent to Acquisition [4] 799      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 2,744      
Total [4] 3,117      
Accumulated Depreciation [4] $ 1,177      
Year Acquired [4] 2000      
Year Constructed [4] 2004      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 18 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 323      
Buildings and Improvements [4] 1,512      
Costs Capitalized Subsequent to Acquisition [4] 251      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 323      
Buildings and Improvements [4] 1,763      
Total [4] 2,086      
Accumulated Depreciation [4] $ 764      
Year Acquired [4] 2005      
Year Constructed [4] 1995      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 19 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 2,256      
Costs Capitalized Subsequent to Acquisition [4] 1,126      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 373      
Buildings and Improvements [4] 3,382      
Total [4] 3,755      
Accumulated Depreciation [4] $ 1,785      
Year Acquired [4] 2000      
Year Constructed [4] 2004      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 20 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,008      
Buildings and Improvements [4] 1,948      
Costs Capitalized Subsequent to Acquisition [4] 1,307      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,008      
Buildings and Improvements [4] 3,255      
Total [4] 4,263      
Accumulated Depreciation [4] $ 1,758      
Year Acquired [4] 2000      
Year Constructed [4] 2004      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 21 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 2,410      
Initial Cost to the Company [Abstract]        
Land [4],[9] 436      
Buildings and Improvements [4],[9] 0      
Costs Capitalized Subsequent to Acquisition [4],[9] 3,504      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 436      
Buildings and Improvements [4],[9] 3,504      
Total [4],[9] 3,940      
Accumulated Depreciation [4],[9] $ 1,233      
Year Acquired [4],[9] 2000/03      
Year Constructed [4],[9] 2006      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 22 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 436      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,537      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 436      
Buildings and Improvements [4] 4,537      
Total [4] 4,973      
Accumulated Depreciation [4] $ 1,748      
Year Acquired [4] 2000      
Year Constructed [4] 2007      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 23 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 4,927      
Initial Cost to the Company [Abstract]        
Land [4],[9] 910      
Buildings and Improvements [4],[9] 0      
Costs Capitalized Subsequent to Acquisition [4],[9] 7,145      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 910      
Buildings and Improvements [4],[9] 7,145      
Total [4],[9] 8,055      
Accumulated Depreciation [4],[9] $ 2,479      
Year Acquired [4],[9] 2000      
Year Constructed [4],[9] 2007      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 24 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,516      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 5,516      
Total [4] 6,353      
Accumulated Depreciation [4] $ 2,066      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 25 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 508      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,762      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 508      
Buildings and Improvements [4] 3,762      
Total [4] 4,270      
Accumulated Depreciation [4] $ 1,203      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 26 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 2,432      
Initial Cost to the Company [Abstract]        
Land [4],[6] 445      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 3,194      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 445      
Buildings and Improvements [4],[6] 3,194      
Total [4],[6] 3,639      
Accumulated Depreciation [4],[6] $ 978      
Year Acquired [4],[6] 2005      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 27 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,004      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 5,004      
Total [4] 5,841      
Accumulated Depreciation [4] $ 1,378      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 28 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 3,176      
Initial Cost to the Company [Abstract]        
Land [4],[6] 550      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 4,202      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 550      
Buildings and Improvements [4],[6] 4,202      
Total [4],[6] 4,752      
Accumulated Depreciation [4],[6] $ 1,134      
Year Acquired [4],[6] 2005      
Year Constructed [4],[6] 2009      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 29 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 3,288      
Initial Cost to the Company [Abstract]        
Land [4],[6] 782      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 4,138      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 974      
Buildings and Improvements [4],[6] 3,946      
Total [4],[6] 4,920      
Accumulated Depreciation [4],[6] $ 1,042      
Year Acquired [4],[6] 2007      
Year Constructed [4],[6] 2009      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 30 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 4,512      
Initial Cost to the Company [Abstract]        
Land [4],[6] 981      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 5,771      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 1,222      
Buildings and Improvements [4],[6] 5,530      
Total [4],[6] 6,752      
Accumulated Depreciation [4],[6] $ 1,754      
Year Acquired [4],[6] 2007      
Year Constructed [4],[6] 2009      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr31a Member        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 684      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,912      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 684      
Buildings and Improvements [4] 3,912      
Total [4] 4,596      
Accumulated Depreciation [4] $ 1,078      
Year Acquired [4] 2008      
Year Constructed [4] 2011      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 31B [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 546      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,537      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 546      
Buildings and Improvements [4] 3,537      
Total [4] 4,083      
Accumulated Depreciation [4] $ 560      
Year Acquired [4] 2008      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston Intl Business Ctr 32 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 4,195      
Initial Cost to the Company [Abstract]        
Land [4],[5] 1,225      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 5,660      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 1,526      
Buildings and Improvements [4],[5] 5,359      
Total [4],[5] 6,885      
Accumulated Depreciation [4],[5] $ 847      
Year Acquired [4],[5] 2007      
Year Constructed [4],[5] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 33 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,166      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 7,859      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,166      
Buildings and Improvements [4] 7,859      
Total [4] 9,025      
Accumulated Depreciation [4] $ 829      
Year Acquired [4] 2011      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 34 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 439      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,373      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 439      
Buildings and Improvements [4] 3,373      
Total [4] 3,812      
Accumulated Depreciation [4] $ 370      
Year Acquired [4] 2005      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 35 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 340      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,475      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 340      
Buildings and Improvements [4] 2,475      
Total [4] 2,815      
Accumulated Depreciation [4] $ 227      
Year Acquired [4] 2005      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 36 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 685      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,878      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 685      
Buildings and Improvements [4] 4,878      
Total [4] 5,563      
Accumulated Depreciation [4] $ 486      
Year Acquired [4] 2011      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 37 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 759      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,370      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 759      
Buildings and Improvements [4] 6,370      
Total [4] 7,129      
Accumulated Depreciation [4] $ 497      
Year Acquired [4] 2011      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 38 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,053      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 7,312      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,053      
Buildings and Improvements [4] 7,312      
Total [4] 8,365      
Accumulated Depreciation [4] $ 703      
Year Acquired [4] 2011      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 39 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 620      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,199      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 620      
Buildings and Improvements [4] 5,199      
Total [4] 5,819      
Accumulated Depreciation [4] $ 154      
Year Acquired [4] 2011      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 40 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,072      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 9,340      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,072      
Buildings and Improvements [4] 9,340      
Total [4] 10,412      
Accumulated Depreciation [4] $ 396      
Year Acquired [4] 2011      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 41 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 649      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,954      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 649      
Buildings and Improvements [4] 5,954      
Total [4] 6,603      
Accumulated Depreciation [4] $ 105      
Year Acquired [4] 2011      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | World Houston 42 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 571      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,812      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 571      
Buildings and Improvements [4] 4,812      
Total [4] 5,383      
Accumulated Depreciation [4] $ 77      
Year Acquired [4] 2011      
Year Constructed [4] 2015      
Industrial [Member] | TEXAS [Member] | Houston [Member] | America Plaza [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 3,910      
Initial Cost to the Company [Abstract]        
Land [4],[10] 662      
Buildings and Improvements [4],[10] 4,660      
Costs Capitalized Subsequent to Acquisition [4],[10] 993      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 662      
Buildings and Improvements [4],[10] 5,653      
Total [4],[10] 6,315      
Accumulated Depreciation [4],[10] $ 3,129      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1996      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Central Green Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 2,930      
Initial Cost to the Company [Abstract]        
Land [4],[10] 566      
Buildings and Improvements [4],[10] 4,031      
Costs Capitalized Subsequent to Acquisition [4],[10] 135      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 566      
Buildings and Improvements [4],[10] 4,166      
Total [4],[10] 4,732      
Accumulated Depreciation [4],[10] $ 2,179      
Year Acquired [4],[10] 1999      
Year Constructed [4],[10] 1998      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Glenmont Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 6,141      
Initial Cost to the Company [Abstract]        
Land [4],[10] 936      
Buildings and Improvements [4],[10] 6,161      
Costs Capitalized Subsequent to Acquisition [4],[10] 2,823      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 936      
Buildings and Improvements [4],[10] 8,984      
Total [4],[10] 9,920      
Accumulated Depreciation [4],[10] $ 4,852      
Year Acquired [4],[10] 1998      
Year Constructed [4],[10] 1999/2000      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 729      
Buildings and Improvements [4] 3,765      
Costs Capitalized Subsequent to Acquisition [4] 2,281      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 729      
Buildings and Improvements [4] 6,046      
Total [4] 6,775      
Accumulated Depreciation [4] $ 3,257      
Year Acquired [4] 2000      
Year Constructed [4] 2001      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 550      
Buildings and Improvements [4] 3,689      
Costs Capitalized Subsequent to Acquisition [4] 1,283      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 550      
Buildings and Improvements [4] 4,972      
Total [4] 5,522      
Accumulated Depreciation [4] $ 2,332      
Year Acquired [4] 2000      
Year Constructed [4] 2004      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 597      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,578      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 751      
Buildings and Improvements [4] 5,424      
Total [4] 6,175      
Accumulated Depreciation [4] $ 2,426      
Year Acquired [4] 1999      
Year Constructed [4] 2006      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Techway Southwest IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 4,187      
Initial Cost to the Company [Abstract]        
Land [4],[6] 535      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 5,730      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 674      
Buildings and Improvements [4],[6] 5,591      
Total [4],[6] 6,265      
Accumulated Depreciation [4],[6] $ 1,765      
Year Acquired [4],[6] 1999      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 458      
Buildings and Improvements [4] 5,712      
Costs Capitalized Subsequent to Acquisition [4] 2,450      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 458      
Buildings and Improvements [4] 8,162      
Total [4] 8,620      
Accumulated Depreciation [4] $ 3,678      
Year Acquired [4] 2002      
Year Constructed [4] 2001      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 415      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,892      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 415      
Buildings and Improvements [4] 2,892      
Total [4] 3,307      
Accumulated Depreciation [4] $ 1,092      
Year Acquired [4] 2005      
Year Constructed [4] 2007      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 460      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,094      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 460      
Buildings and Improvements [4] 3,094      
Total [4] 3,554      
Accumulated Depreciation [4] $ 1,216      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 460      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,035      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 460      
Buildings and Improvements [4] 3,035      
Total [4] 3,495      
Accumulated Depreciation [4] $ 1,194      
Year Acquired [4] 2005      
Year Constructed [4] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing V [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 3,711      
Initial Cost to the Company [Abstract]        
Land [4],[6] 701      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 4,852      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 701      
Buildings and Improvements [4],[6] 4,852      
Total [4],[6] 5,553      
Accumulated Depreciation [4],[6] $ 1,707      
Year Acquired [4],[6] 2005      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 4,043      
Initial Cost to the Company [Abstract]        
Land [4],[5] 618      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 6,017      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 618      
Buildings and Improvements [4],[5] 6,017      
Total [4],[5] 6,635      
Accumulated Depreciation [4],[5] $ 1,522      
Year Acquired [4],[5] 2005      
Year Constructed [4],[5] 2008      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 4,052      
Initial Cost to the Company [Abstract]        
Land [4],[5] 765      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 5,884      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 765      
Buildings and Improvements [4],[5] 5,884      
Total [4],[5] 6,649      
Accumulated Depreciation [4],[5] $ 1,958      
Year Acquired [4],[5] 2005      
Year Constructed [4],[5] 2009      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing VIII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 721      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,576      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 721      
Buildings and Improvements [4] 4,576      
Total [4] 5,297      
Accumulated Depreciation [4] $ 939      
Year Acquired [4] 2005      
Year Constructed [4] 2011      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing IX [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 418      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,113      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 418      
Buildings and Improvements [4] 2,113      
Total [4] 2,531      
Accumulated Depreciation [4] $ 282      
Year Acquired [4] 2007      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing X [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 733      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,871      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 733      
Buildings and Improvements [4] 3,871      
Total [4] 4,604      
Accumulated Depreciation [4] $ 477      
Year Acquired [4] 2007      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Beltway Crossing XI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 690      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,101      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 690      
Buildings and Improvements [4] 4,101      
Total [4] 4,791      
Accumulated Depreciation [4] $ 366      
Year Acquired [4] 2007      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | West Road I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 621      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,324      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 621      
Buildings and Improvements [4] 4,324      
Total [4] 4,945      
Accumulated Depreciation [4] $ 159      
Year Acquired [4] 2012      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | West Road II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 981      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,285      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 981      
Buildings and Improvements [4] 5,285      
Total [4] 6,266      
Accumulated Depreciation [4] $ 235      
Year Acquired [4] 2012      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 1 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 566      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,997      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 566      
Buildings and Improvements [4] 2,997      
Total [4] 3,563      
Accumulated Depreciation [4] $ 314      
Year Acquired [4] 2012      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 2 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 829      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,385      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 833      
Buildings and Improvements [4] 4,381      
Total [4] 5,214      
Accumulated Depreciation [4] $ 453      
Year Acquired [4] 2012      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 3 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 609      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,357      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 613      
Buildings and Improvements [4] 4,353      
Total [4] 4,966      
Accumulated Depreciation [4] $ 446      
Year Acquired [4] 2012      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 4 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 694      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,506      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 699      
Buildings and Improvements [4] 4,501      
Total [4] 5,200      
Accumulated Depreciation [4] $ 365      
Year Acquired [4] 2012      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 5 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 933      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,866      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 940      
Buildings and Improvements [4] 5,859      
Total [4] 6,799      
Accumulated Depreciation [4] $ 322      
Year Acquired [4] 2012      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | Houston [Member] | Ten West Crossing 6 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 640      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,113      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 644      
Buildings and Improvements [4] 4,109      
Total [4] 4,753      
Accumulated Depreciation [4] $ 96      
Year Acquired [4] 2012      
Year Constructed [4] 2014      
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Butterfield Trail [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 20,725      
Costs Capitalized Subsequent to Acquisition [4] 8,420      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 29,145      
Total [4] 29,145      
Accumulated Depreciation [4] $ 16,841      
Year Acquired [4] 1997/2000      
Year Constructed [4] 1987/95      
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Rojas Commerce Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[10] $ 4,690      
Initial Cost to the Company [Abstract]        
Land [4],[10] 900      
Buildings and Improvements [4],[10] 3,659      
Costs Capitalized Subsequent to Acquisition [4],[10] 3,016      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[10] 900      
Buildings and Improvements [4],[10] 6,675      
Total [4],[10] 7,575      
Accumulated Depreciation [4],[10] $ 4,707      
Year Acquired [4],[10] 1999      
Year Constructed [4],[10] 1986      
Industrial [Member] | TEXAS [Member] | El Paso [Member] | Americas Ten Business Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 526      
Buildings and Improvements [4] 2,778      
Costs Capitalized Subsequent to Acquisition [4] 1,181      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 526      
Buildings and Improvements [4] 3,959      
Total [4] 4,485      
Accumulated Depreciation [4] $ 2,125      
Year Acquired [4] 2001      
Year Constructed [4] 2003      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Alamo Downs Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 5,077      
Initial Cost to the Company [Abstract]        
Land [4],[11] 1,342      
Buildings and Improvements [4],[11] 6,338      
Costs Capitalized Subsequent to Acquisition [4],[11] 1,216      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 1,342      
Buildings and Improvements [4],[11] 7,554      
Total [4],[11] 8,896      
Accumulated Depreciation [4],[11] $ 3,948      
Year Acquired [4],[11] 2004      
Year Constructed [4],[11] 1986/2002      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion Business Park 1-13, 15 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 23,508      
Initial Cost to the Company [Abstract]        
Land [4],[11] 4,143      
Buildings and Improvements [4],[11] 31,432      
Costs Capitalized Subsequent to Acquisition [4],[11] 5,616      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 4,143      
Buildings and Improvements [4],[11] 37,048      
Total [4],[11] 41,191      
Accumulated Depreciation [4],[11] $ 15,762      
Year Acquired [4],[11] 2005      
Year Constructed [4],[11] 1988-2000/06      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 14 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 2,180      
Initial Cost to the Company [Abstract]        
Land [4],[11] 423      
Buildings and Improvements [4],[11] 0      
Costs Capitalized Subsequent to Acquisition [4],[11] 3,397      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 423      
Buildings and Improvements [4],[11] 3,397      
Total [4],[11] 3,820      
Accumulated Depreciation [4],[11] $ 1,218      
Year Acquired [4],[11] 2005      
Year Constructed [4],[11] 2006      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 16 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 2,424      
Initial Cost to the Company [Abstract]        
Land [4],[9] 427      
Buildings and Improvements [4],[9] 0      
Costs Capitalized Subsequent to Acquisition [4],[9] 3,535      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 427      
Buildings and Improvements [4],[9] 3,535      
Total [4],[9] 3,962      
Accumulated Depreciation [4],[9] $ 1,073      
Year Acquired [4],[9] 2005      
Year Constructed [4],[9] 2007      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 17 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 2,622      
Initial Cost to the Company [Abstract]        
Land [4],[11] 616      
Buildings and Improvements [4],[11] 0      
Costs Capitalized Subsequent to Acquisition [4],[11] 3,978      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 616      
Buildings and Improvements [4],[11] 3,978      
Total [4],[11] 4,594      
Accumulated Depreciation [4],[11] $ 1,939      
Year Acquired [4],[11] 2005      
Year Constructed [4],[11] 2007      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Arion 18 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 1,689      
Initial Cost to the Company [Abstract]        
Land [4],[5] 418      
Buildings and Improvements [4],[5] 0      
Costs Capitalized Subsequent to Acquisition [4],[5] 2,354      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 418      
Buildings and Improvements [4],[5] 2,354      
Total [4],[5] 2,772      
Accumulated Depreciation [4],[5] $ 947      
Year Acquired [4],[5] 2005      
Year Constructed [4],[5] 2008      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center 1-4 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,494      
Buildings and Improvements [4] 10,804      
Costs Capitalized Subsequent to Acquisition [4] 3,097      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,494      
Buildings and Improvements [4] 13,901      
Total [4] 15,395      
Accumulated Depreciation [4] $ 6,337      
Year Acquired [4] 2005      
Year Constructed [4] 1998/99      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center 5 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 2,573      
Initial Cost to the Company [Abstract]        
Land [4],[6] 412      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 3,438      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 412      
Buildings and Improvements [4],[6] 3,438      
Total [4],[6] 3,850      
Accumulated Depreciation [4],[6] $ 1,407      
Year Acquired [4],[6] 2006      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center 6 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 2,726      
Initial Cost to the Company [Abstract]        
Land [4],[6] 505      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 3,574      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 505      
Buildings and Improvements [4],[6] 3,574      
Total [4],[6] 4,079      
Accumulated Depreciation [4],[6] $ 1,243      
Year Acquired [4],[6] 2006      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center 7 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 2,930      
Initial Cost to the Company [Abstract]        
Land [4],[6] 546      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 3,838      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 546      
Buildings and Improvements [4],[6] 3,838      
Total [4],[6] 4,384      
Accumulated Depreciation [4],[6] $ 818      
Year Acquired [4],[6] 2006      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Wetmore Business Center 8 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 5,812      
Initial Cost to the Company [Abstract]        
Land [4],[6] 1,056      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 7,640      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 1,056      
Buildings and Improvements [4],[6] 7,640      
Total [4],[6] 8,696      
Accumulated Depreciation [4],[6] $ 2,049      
Year Acquired [4],[6] 2006      
Year Constructed [4],[6] 2008      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Fairgrounds Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,644      
Buildings and Improvements [4] 8,209      
Costs Capitalized Subsequent to Acquisition [4] 2,102      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,644      
Buildings and Improvements [4] 10,311      
Total [4] 11,955      
Accumulated Depreciation [4] $ 4,420      
Year Acquired [4] 2007      
Year Constructed [4] 1985/86      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Rittiman Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,083      
Buildings and Improvements [4] 6,649      
Costs Capitalized Subsequent to Acquisition [4] 289      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,083      
Buildings and Improvements [4] 6,938      
Total [4] 8,021      
Accumulated Depreciation [4] $ 957      
Year Acquired [4] 2011      
Year Constructed [4] 2000      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Thousand Oaks I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 607      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,286      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 607      
Buildings and Improvements [4] 4,286      
Total [4] 4,893      
Accumulated Depreciation [4] $ 674      
Year Acquired [4] 2008      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Thousand Oaks 2 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 794      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,719      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 794      
Buildings and Improvements [4] 4,719      
Total [4] 5,513      
Accumulated Depreciation [4] $ 646      
Year Acquired [4] 2008      
Year Constructed [4] 2012      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Thousand Oaks 3 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 772      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,457      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 772      
Buildings and Improvements [4] 4,457      
Total [4] 5,229      
Accumulated Depreciation [4] $ 414      
Year Acquired [4] 2008      
Year Constructed [4] 2013      
Industrial [Member] | TEXAS [Member] | San Antonio [Member] | Thousand Oaks 4 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 753      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,953      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 753      
Buildings and Improvements [4] 3,953      
Total [4] 4,706      
Accumulated Depreciation [4] $ 24      
Year Acquired [4] 2013      
Year Constructed [4] 2015      
Industrial [Member] | TEXAS [Member] | Austin [Member] | Colorado Crossing Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 4,602      
Buildings and Improvements [4] 19,757      
Costs Capitalized Subsequent to Acquisition [4] 61      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 4,602      
Buildings and Improvements [4] 19,818      
Total [4] 24,420      
Accumulated Depreciation [4] $ 1,698      
Year Acquired [4] 2014      
Year Constructed [4] 2009      
Industrial [Member] | TEXAS [Member] | Austin [Member] | Southpark Corporate Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,670      
Buildings and Improvements [4] 14,756      
Costs Capitalized Subsequent to Acquisition [4] 0      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,670      
Buildings and Improvements [4] 14,756      
Total [4] 17,426      
Accumulated Depreciation [4] $ 268      
Year Acquired [4] 2015      
Year Constructed [4] 1995      
Industrial [Member] | TEXAS [Member] | Austin [Member] | Springdale Business Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,824      
Buildings and Improvements [4] 8,398      
Costs Capitalized Subsequent to Acquisition [4] 0      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,824      
Buildings and Improvements [4] 8,398      
Total [4] 11,222      
Accumulated Depreciation [4] $ 111      
Year Acquired [4] 2015      
Year Constructed [4] 2000      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 3,349      
Costs Capitalized Subsequent to Acquisition [4] 932      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 837      
Buildings and Improvements [4] 4,281      
Total [4] 5,118      
Accumulated Depreciation [4] $ 2,523      
Year Acquired [4] 1996      
Year Constructed [4] 1971      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 455      
Buildings and Improvements [4] 482      
Costs Capitalized Subsequent to Acquisition [4] 180      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 455      
Buildings and Improvements [4] 662      
Total [4] 1,117      
Accumulated Depreciation [4] $ 408      
Year Acquired [4] 1999      
Year Constructed [4] 1971      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 775      
Buildings and Improvements [4] 1,742      
Costs Capitalized Subsequent to Acquisition [4] 531      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 775      
Buildings and Improvements [4] 2,273      
Total [4] 3,048      
Accumulated Depreciation [4] $ 1,268      
Year Acquired [4] 2000      
Year Constructed [4] 1983      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 380      
Buildings and Improvements [4] 1,652      
Costs Capitalized Subsequent to Acquisition [4] 783      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 380      
Buildings and Improvements [4] 2,435      
Total [4] 2,815      
Accumulated Depreciation [4] $ 1,406      
Year Acquired [4] 2000      
Year Constructed [4] 1986      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park V [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 353      
Buildings and Improvements [4] 1,090      
Costs Capitalized Subsequent to Acquisition [4] 120      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 353      
Buildings and Improvements [4] 1,210      
Total [4] 1,563      
Accumulated Depreciation [4] $ 638      
Year Acquired [4] 2002      
Year Constructed [4] 1980      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 1,904      
Initial Cost to the Company [Abstract]        
Land [4],[9] 599      
Buildings and Improvements [4],[9] 1,855      
Costs Capitalized Subsequent to Acquisition [4],[9] 658      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 599      
Buildings and Improvements [4],[9] 2,513      
Total [4],[9] 3,112      
Accumulated Depreciation [4],[9] $ 1,387      
Year Acquired [4],[9] 2002      
Year Constructed [4],[9] 1979      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Broadway Industrial Park VII [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 450      
Buildings and Improvements [4] 650      
Costs Capitalized Subsequent to Acquisition [4] 232      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 450      
Buildings and Improvements [4] 882      
Total [4] 1,332      
Accumulated Depreciation [4] $ 136      
Year Acquired [4] 2011      
Year Constructed [4] 1999      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Kyrene Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,490      
Buildings and Improvements [4] 4,453      
Costs Capitalized Subsequent to Acquisition [4] 1,514      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,490      
Buildings and Improvements [4] 5,967      
Total [4] 7,457      
Accumulated Depreciation [4] $ 3,490      
Year Acquired [4] 1999      
Year Constructed [4] 1981/2001      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Southpark Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 918      
Buildings and Improvements [4] 2,738      
Costs Capitalized Subsequent to Acquisition [4] 644      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 918      
Buildings and Improvements [4] 3,382      
Total [4] 4,300      
Accumulated Depreciation [4] $ 1,472      
Year Acquired [4] 2001      
Year Constructed [4] 2000      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Santan 10 Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 2,176      
Initial Cost to the Company [Abstract]        
Land [4],[11] 846      
Buildings and Improvements [4],[11] 2,647      
Costs Capitalized Subsequent to Acquisition [4],[11] 319      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 846      
Buildings and Improvements [4],[11] 2,966      
Total [4],[11] 3,812      
Accumulated Depreciation [4],[11] $ 1,306      
Year Acquired [4],[11] 2001      
Year Constructed [4],[11] 2005      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Santan 10 Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 3,797      
Initial Cost to the Company [Abstract]        
Land [4],[9] 1,088      
Buildings and Improvements [4],[9] 0      
Costs Capitalized Subsequent to Acquisition [4],[9] 5,119      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 1,088      
Buildings and Improvements [4],[9] 5,119      
Total [4],[9] 6,207      
Accumulated Depreciation [4],[9] $ 1,976      
Year Acquired [4],[9] 2004      
Year Constructed [4],[9] 2007      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Chandler Freeways [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,525      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 7,381      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,525      
Buildings and Improvements [4] 7,381      
Total [4] 8,906      
Accumulated Depreciation [4] $ 516      
Year Acquired [4] 2012      
Year Constructed [4] 2013      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Kyrene 202 I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 653      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 5,777      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 653      
Buildings and Improvements [4] 5,777      
Total [4] 6,430      
Accumulated Depreciation [4] $ 145      
Year Acquired [4] 2011      
Year Constructed [4] 2014      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Kyrene 202 II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 387      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,414      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 387      
Buildings and Improvements [4] 3,414      
Total [4] 3,801      
Accumulated Depreciation [4] $ 110      
Year Acquired [4] 2011      
Year Constructed [4] 2014      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Metro Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,927      
Buildings and Improvements [4] 7,708      
Costs Capitalized Subsequent to Acquisition [4] 6,747      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,927      
Buildings and Improvements [4] 14,455      
Total [4] 16,382      
Accumulated Depreciation [4] $ 9,101      
Year Acquired [4] 1996      
Year Constructed [4] 1977/79      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | 35th Avenue Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 418      
Buildings and Improvements [4] 2,381      
Costs Capitalized Subsequent to Acquisition [4] 206      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 418      
Buildings and Improvements [4] 2,587      
Total [4] 3,005      
Accumulated Depreciation [4] $ 1,226      
Year Acquired [4] 1997      
Year Constructed [4] 1967      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | 51st Avenue Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 300      
Buildings and Improvements [4] 2,029      
Costs Capitalized Subsequent to Acquisition [4] 977      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 300      
Buildings and Improvements [4] 3,006      
Total [4] 3,306      
Accumulated Depreciation [4] $ 1,765      
Year Acquired [4] 1998      
Year Constructed [4] 1987      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | East University Distribution Center I and II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 4,365      
Initial Cost to the Company [Abstract]        
Land [4],[9] 1,120      
Buildings and Improvements [4],[9] 4,482      
Costs Capitalized Subsequent to Acquisition [4],[9] 1,533      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 1,120      
Buildings and Improvements [4],[9] 6,015      
Total [4],[9] 7,135      
Accumulated Depreciation [4],[9] $ 3,525      
Year Acquired [4],[9] 1998      
Year Constructed [4],[9] 1987/89      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | East University Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 444      
Buildings and Improvements [4] 698      
Costs Capitalized Subsequent to Acquisition [4] 208      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 444      
Buildings and Improvements [4] 906      
Total [4] 1,350      
Accumulated Depreciation [4] $ 184      
Year Acquired [4] 2010      
Year Constructed [4] 1981      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | 55th Avenue Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 3,394      
Initial Cost to the Company [Abstract]        
Land [4],[9] 912      
Buildings and Improvements [4],[9] 3,717      
Costs Capitalized Subsequent to Acquisition [4],[9] 919      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 917      
Buildings and Improvements [4],[9] 4,631      
Total [4],[9] 5,548      
Accumulated Depreciation [4],[9] $ 2,848      
Year Acquired [4],[9] 1998      
Year Constructed [4],[9] 1987      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Interstate Commons Dist Ctr I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 798      
Buildings and Improvements [4] 3,632      
Costs Capitalized Subsequent to Acquisition [4] 1,708      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 798      
Buildings and Improvements [4] 5,340      
Total [4] 6,138      
Accumulated Depreciation [4] $ 2,914      
Year Acquired [4] 1999      
Year Constructed [4] 1988      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Interstate Commons Dist Ctr II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 320      
Buildings and Improvements [4] 2,448      
Costs Capitalized Subsequent to Acquisition [4] 429      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 320      
Buildings and Improvements [4] 2,877      
Total [4] 3,197      
Accumulated Depreciation [4] $ 1,372      
Year Acquired [4] 1999      
Year Constructed [4] 2000      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Interstate Commons Dist Ctr III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 242      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,996      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 242      
Buildings and Improvements [4] 2,996      
Total [4] 3,238      
Accumulated Depreciation [4] $ 861      
Year Acquired [4] 2000      
Year Constructed [4] 2008      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Airport Commons [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,000      
Buildings and Improvements [4] 1,510      
Costs Capitalized Subsequent to Acquisition [4] 1,336      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,000      
Buildings and Improvements [4] 2,846      
Total [4] 3,846      
Accumulated Depreciation [4] $ 1,479      
Year Acquired [4] 2003      
Year Constructed [4] 1971      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | 40th Avenue Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 4,519      
Initial Cost to the Company [Abstract]        
Land [4],[6] 703      
Buildings and Improvements [4],[6] 0      
Costs Capitalized Subsequent to Acquisition [4],[6] 6,059      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 703      
Buildings and Improvements [4],[6] 6,059      
Total [4],[6] 6,762      
Accumulated Depreciation [4],[6] $ 1,670      
Year Acquired [4],[6] 2004      
Year Constructed [4],[6] 2008      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Sky Harbor Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 5,839      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 21,324      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 5,839      
Buildings and Improvements [4] 21,324      
Total [4] 27,163      
Accumulated Depreciation [4] $ 5,785      
Year Acquired [4] 2006      
Year Constructed [4] 2008      
Industrial [Member] | ARIZONA [Member] | Phoenix Area [Member] | Sky Harbor 6 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 807      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 2,177      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 807      
Buildings and Improvements [4] 2,177      
Total [4] 2,984      
Accumulated Depreciation [4] $ 20      
Year Acquired [4] 2014      
Year Constructed [4] 2015      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 506      
Buildings and Improvements [4] 3,564      
Costs Capitalized Subsequent to Acquisition [4] 2,173      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 693      
Buildings and Improvements [4] 5,550      
Total [4] 6,243      
Accumulated Depreciation [4] $ 2,338      
Year Acquired [4] 1997/2003      
Year Constructed [4] 1994/2003      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 442      
Buildings and Improvements [4] 3,381      
Costs Capitalized Subsequent to Acquisition [4] 37      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 442      
Buildings and Improvements [4] 3,418      
Total [4] 3,860      
Accumulated Depreciation [4] $ 1,056      
Year Acquired [4] 2007      
Year Constructed [4] 2000      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Country Club III and IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,407      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 11,794      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,575      
Buildings and Improvements [4] 11,626      
Total [4] 13,201      
Accumulated Depreciation [4] $ 3,432      
Year Acquired [4] 2007      
Year Constructed [4] 2009      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Airport Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,103      
Buildings and Improvements [4] 4,672      
Costs Capitalized Subsequent to Acquisition [4] 1,549      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,103      
Buildings and Improvements [4] 6,221      
Total [4] 7,324      
Accumulated Depreciation [4] $ 3,576      
Year Acquired [4] 1998      
Year Constructed [4] 1995      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Southpointe Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 3,982      
Costs Capitalized Subsequent to Acquisition [4] 2,950      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 6,932      
Total [4] 6,932      
Accumulated Depreciation [4] $ 3,997      
Year Acquired [4] 1999      
Year Constructed [4] 1989      
Industrial [Member] | ARIZONA [Member] | Tucson [Member] | Benan Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 707      
Buildings and Improvements [4] 1,842      
Costs Capitalized Subsequent to Acquisition [4] 635      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 707      
Buildings and Improvements [4] 2,477      
Total [4] 3,184      
Accumulated Depreciation [4] $ 1,287      
Year Acquired [4] 2005      
Year Constructed [4] 2001      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | NorthPark Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[9] $ 13,833      
Initial Cost to the Company [Abstract]        
Land [4],[9] 2,758      
Buildings and Improvements [4],[9] 15,932      
Costs Capitalized Subsequent to Acquisition [4],[9] 3,924      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[9] 2,758      
Buildings and Improvements [4],[9] 19,856      
Total [4],[9] 22,614      
Accumulated Depreciation [4],[9] $ 7,910      
Year Acquired [4],[9] 2006      
Year Constructed [4],[9] 1987-89      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lindbergh Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 470      
Buildings and Improvements [4] 3,401      
Costs Capitalized Subsequent to Acquisition [4] 444      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 470      
Buildings and Improvements [4] 3,845      
Total [4] 4,315      
Accumulated Depreciation [4] $ 1,371      
Year Acquired [4] 2007      
Year Constructed [4] 2001/03      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 765      
Buildings and Improvements [4] 4,303      
Costs Capitalized Subsequent to Acquisition [4] 791      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 765      
Buildings and Improvements [4] 5,094      
Total [4] 5,859      
Accumulated Depreciation [4] $ 1,687      
Year Acquired [4] 2007      
Year Constructed [4] 1983      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 1,362      
Initial Cost to the Company [Abstract]        
Land [4],[5] 335      
Buildings and Improvements [4],[5] 1,603      
Costs Capitalized Subsequent to Acquisition [4],[5] 297      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 335      
Buildings and Improvements [4],[5] 1,900      
Total [4],[5] 2,235      
Accumulated Depreciation [4],[5] $ 475      
Year Acquired [4],[5] 2010      
Year Constructed [4],[5] 1987      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Commerce Park III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 2,225      
Initial Cost to the Company [Abstract]        
Land [4],[5] 558      
Buildings and Improvements [4],[5] 2,225      
Costs Capitalized Subsequent to Acquisition [4],[5] 868      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 558      
Buildings and Improvements [4],[5] 3,093      
Total [4],[5] 3,651      
Accumulated Depreciation [4],[5] $ 726      
Year Acquired [4],[5] 2010      
Year Constructed [4],[5] 1981      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Nations Ford Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 3,924      
Buildings and Improvements [4] 16,171      
Costs Capitalized Subsequent to Acquisition [4] 3,128      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 3,924      
Buildings and Improvements [4] 19,299      
Total [4] 23,223      
Accumulated Depreciation [4] $ 7,679      
Year Acquired [4] 2007      
Year Constructed [4] 1989/94      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Airport Commerce Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,454      
Buildings and Improvements [4] 10,136      
Costs Capitalized Subsequent to Acquisition [4] 1,620      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,454      
Buildings and Improvements [4] 11,756      
Total [4] 13,210      
Accumulated Depreciation [4] $ 3,374      
Year Acquired [4] 2008      
Year Constructed [4] 2001/02      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Interchange Park I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 986      
Buildings and Improvements [4] 7,949      
Costs Capitalized Subsequent to Acquisition [4] 476      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 986      
Buildings and Improvements [4] 8,425      
Total [4] 9,411      
Accumulated Depreciation [4] $ 2,240      
Year Acquired [4] 2008      
Year Constructed [4] 1989      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Interchange Park II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 746      
Buildings and Improvements [4] 1,456      
Costs Capitalized Subsequent to Acquisition [4] 55      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 746      
Buildings and Improvements [4] 1,511      
Total [4] 2,257      
Accumulated Depreciation [4] $ 121      
Year Acquired [4] 2013      
Year Constructed [4] 2000      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,284      
Buildings and Improvements [4] 13,163      
Costs Capitalized Subsequent to Acquisition [4] 780      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,284      
Buildings and Improvements [4] 13,943      
Total [4] 15,227      
Accumulated Depreciation [4] $ 3,341      
Year Acquired [4] 2008      
Year Constructed [4] 2006      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 10,142      
Initial Cost to the Company [Abstract]        
Land [4],[5] 3,033      
Buildings and Improvements [4],[5] 11,497      
Costs Capitalized Subsequent to Acquisition [4],[5] 2,116      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 3,033      
Buildings and Improvements [4],[5] 13,613      
Total [4],[5] 16,646      
Accumulated Depreciation [4],[5] $ 1,688      
Year Acquired [4],[5] 2011      
Year Constructed [4],[5] 2003      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Ridge Creek Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,459      
Buildings and Improvements [4] 11,147      
Costs Capitalized Subsequent to Acquisition [4] 381      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,459      
Buildings and Improvements [4] 11,528      
Total [4] 13,987      
Accumulated Depreciation [4] $ 702      
Year Acquired [4] 2014      
Year Constructed [4] 2013      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Lakeview Business [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 4,332      
Initial Cost to the Company [Abstract]        
Land [4],[5] 1,392      
Buildings and Improvements [4],[5] 5,068      
Costs Capitalized Subsequent to Acquisition [4],[5] 650      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 1,392      
Buildings and Improvements [4],[5] 5,718      
Total [4],[5] 7,110      
Accumulated Depreciation [4],[5] $ 978      
Year Acquired [4],[5] 2011      
Year Constructed [4],[5] 1996      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Steele Creek I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 993      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,314      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,010      
Buildings and Improvements [4] 4,297      
Total [4] 5,307      
Accumulated Depreciation [4] $ 372      
Year Acquired [4] 2013      
Year Constructed [4] 2014      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Steele Creek II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 941      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 4,457      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 957      
Buildings and Improvements [4] 4,441      
Total [4] 5,398      
Accumulated Depreciation [4] $ 246      
Year Acquired [4] 2013      
Year Constructed [4] 2014      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Steele Creek III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 1,464      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 6,396      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 1,469      
Buildings and Improvements [4] 6,391      
Total [4] 7,860      
Accumulated Depreciation [4] $ 295      
Year Acquired [4] 2013      
Year Constructed [4] 2014      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Steele Creek IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 684      
Buildings and Improvements [4] 0      
Costs Capitalized Subsequent to Acquisition [4] 3,925      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 687      
Buildings and Improvements [4] 3,922      
Total [4] 4,609      
Accumulated Depreciation [4] $ 32      
Year Acquired [4] 2013      
Year Constructed [4] 2015      
Industrial [Member] | NORTH CAROLINA [Member] | Charlotte [Member] | Waterford Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 654      
Buildings and Improvements [4] 3,392      
Costs Capitalized Subsequent to Acquisition [4] 501      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 654      
Buildings and Improvements [4] 3,893      
Total [4] 4,547      
Accumulated Depreciation [4] $ 928      
Year Acquired [4] 2008      
Year Constructed [4] 2000      
Industrial [Member] | LOUISIANA | New Orleans [Member] | Elmwood Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,861      
Buildings and Improvements [4] 6,337      
Costs Capitalized Subsequent to Acquisition [4] 4,264      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,861      
Buildings and Improvements [4] 10,601      
Total [4] 13,462      
Accumulated Depreciation [4] $ 7,125      
Year Acquired [4] 1997      
Year Constructed [4] 1979      
Industrial [Member] | LOUISIANA | New Orleans [Member] | Riverbend Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 2,557      
Buildings and Improvements [4] 17,623      
Costs Capitalized Subsequent to Acquisition [4] 6,210      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 2,557      
Buildings and Improvements [4] 23,833      
Total [4] 26,390      
Accumulated Depreciation [4] $ 12,750      
Year Acquired [4] 1997      
Year Constructed [4] 1984      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 3,618      
Initial Cost to the Company [Abstract]        
Land [4],[11] 1,023      
Buildings and Improvements [4],[11] 3,861      
Costs Capitalized Subsequent to Acquisition [4],[11] 1,455      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 1,023      
Buildings and Improvements [4],[11] 5,316      
Total [4],[11] 6,339      
Accumulated Depreciation [4],[11] $ 3,872      
Year Acquired [4],[11] 1988      
Year Constructed [4],[11] 1987      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 2,494      
Initial Cost to the Company [Abstract]        
Land [4],[11] 230      
Buildings and Improvements [4],[11] 2,977      
Costs Capitalized Subsequent to Acquisition [4],[11] 1,164      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 230      
Buildings and Improvements [4],[11] 4,141      
Total [4],[11] 4,371      
Accumulated Depreciation [4],[11] $ 2,610      
Year Acquired [4],[11] 1996/97      
Year Constructed [4],[11] 1996/97      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 3,660      
Initial Cost to the Company [Abstract]        
Land [4],[11] 1,098      
Buildings and Improvements [4],[11] 3,884      
Costs Capitalized Subsequent to Acquisition [4],[11] 1,431      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 1,098      
Buildings and Improvements [4],[11] 5,315      
Total [4],[11] 6,413      
Accumulated Depreciation [4],[11] $ 2,703      
Year Acquired [4],[11] 1997/98      
Year Constructed [4],[11] 1999      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Rampart Distribution Center IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[11] $ 4,855      
Initial Cost to the Company [Abstract]        
Land [4],[11] 590      
Buildings and Improvements [4],[11] 0      
Costs Capitalized Subsequent to Acquisition [4],[11] 7,918      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[11] 590      
Buildings and Improvements [4],[11] 7,918      
Total [4],[11] 8,508      
Accumulated Depreciation [4],[11] $ 52      
Year Acquired [4],[11] 2012      
Year Constructed [4],[11] 2014      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Concord Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[5] $ 3,816      
Initial Cost to the Company [Abstract]        
Land [4],[5] 1,051      
Buildings and Improvements [4],[5] 4,773      
Costs Capitalized Subsequent to Acquisition [4],[5] 439      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[5] 1,051      
Buildings and Improvements [4],[5] 5,212      
Total [4],[5] 6,263      
Accumulated Depreciation [4],[5] $ 1,760      
Year Acquired [4],[5] 2007      
Year Constructed [4],[5] 2000      
Industrial [Member] | COLORADO [Member] | Denver [Member] | Centennial Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4],[6] $ 3,853      
Initial Cost to the Company [Abstract]        
Land [4],[6] 750      
Buildings and Improvements [4],[6] 3,319      
Costs Capitalized Subsequent to Acquisition [4],[6] 1,697      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4],[6] 750      
Buildings and Improvements [4],[6] 5,016      
Total [4],[6] 5,766      
Accumulated Depreciation [4],[6] $ 1,579      
Year Acquired [4],[6] 2007      
Year Constructed [4],[6] 1990      
Industrial [Member] | NEVADA | Las Vegas [Member] | Arville Distribution Center [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 4,933      
Buildings and Improvements [4] 5,094      
Costs Capitalized Subsequent to Acquisition [4] 330      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 4,933      
Buildings and Improvements [4] 5,424      
Total [4] 10,357      
Accumulated Depreciation [4] $ 1,527      
Year Acquired [4] 2009      
Year Constructed [4] 1997      
Industrial [Member] | MISSISSIPPI | Jackson area [Member] | Interchange Business Park [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 343      
Buildings and Improvements [4] 5,007      
Costs Capitalized Subsequent to Acquisition [4] 3,080      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 343      
Buildings and Improvements [4] 8,087      
Total [4] 8,430      
Accumulated Depreciation [4] $ 4,926      
Year Acquired [4] 1997      
Year Constructed [4] 1981      
Industrial [Member] | MISSISSIPPI | Jackson area [Member] | Tower Automotive [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 0      
Buildings and Improvements [4] 9,958      
Costs Capitalized Subsequent to Acquisition [4] 1,228      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 17      
Buildings and Improvements [4] 11,169      
Total [4] 11,186      
Accumulated Depreciation [4] $ 4,333      
Year Acquired [4] 2001      
Year Constructed [4] 2002      
Industrial [Member] | MISSISSIPPI | Jackson area [Member] | Metro Airport Commerce Center I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 303      
Buildings and Improvements [4] 1,479      
Costs Capitalized Subsequent to Acquisition [4] 1,029      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 303      
Buildings and Improvements [4] 2,508      
Total [4] 2,811      
Accumulated Depreciation [4] $ 1,439      
Year Acquired [4] 2001      
Year Constructed [4] 2003      
Industrial [Member] | TENNESSEE | Memphis [Member] | Memphis I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [4] $ 0      
Initial Cost to the Company [Abstract]        
Land [4] 250      
Buildings and Improvements [4] 1,916      
Costs Capitalized Subsequent to Acquisition [4] 1,426      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [4] 250      
Buildings and Improvements [4] 3,342      
Total [4] 3,592      
Accumulated Depreciation [4] $ 1,868      
Year Acquired [4] 1998      
Year Constructed [4] 1975      
Industrial Development [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 68,158      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 102,283      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 70,653      
Buildings and Improvements [12] 99,788      
Total [12] 170,441      
Accumulated Depreciation [12] 162      
Industrial Development [Member] | FLORIDA [Member] | Oak Creek land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,226      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 2,345      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,447      
Buildings and Improvements [12] 2,124      
Total [12] 3,571      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2005      
Year Constructed [12] n/a      
Industrial Development [Member] | FLORIDA [Member] | Madison II & III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 624      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 6,793      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 624      
Buildings and Improvements [12] 6,793      
Total [12] 7,417      
Accumulated Depreciation [12] $ 61      
Year Acquired [12] 2012      
Year Constructed [12] 2015      
Industrial Development [Member] | FLORIDA [Member] | Madison land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 565      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 503      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 565      
Buildings and Improvements [12] 503      
Total [12] 1,068      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] n/a      
Industrial Development [Member] | FLORIDA [Member] | Horizon III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 991      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 5,124      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 991      
Buildings and Improvements [12] 5,124      
Total [12] 6,115      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2008/09      
Year Constructed [12] n/a      
Industrial Development [Member] | FLORIDA [Member] | Horizon land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 9,160      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 11,211      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 9,160      
Buildings and Improvements [12] 11,211      
Total [12] 20,371      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2008/09      
Year Constructed [12] n/a      
Industrial Development [Member] | FLORIDA [Member] | SunCoast land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 10,892      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 6,966      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 11,104      
Buildings and Improvements [12] 6,754      
Total [12] 17,858      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2006      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | North Stemmons land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 537      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 276      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 537      
Buildings and Improvements [12] 276      
Total [12] 813      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2001      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | ParkView 1-3 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 2,663      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 14,593      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 2,663      
Buildings and Improvements [12] 14,593      
Total [12] 17,256      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2014      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | ParkView Commerce Center land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 400      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 104      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 405      
Buildings and Improvements [12] 99      
Total [12] 504      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2014      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | CreekView 121 land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 5,874      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 499      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 5,874      
Buildings and Improvements [12] 499      
Total [12] 6,373      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Valwood land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 416      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 20      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 416      
Buildings and Improvements [12] 20      
Total [12] 436      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 4,617      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 3,200      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 5,351      
Buildings and Improvements [12] 2,466      
Total [12] 7,817      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2000      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | World Houston Intl Business Ctr land-2011 expansion [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 3,498      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 3,861      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 4,783      
Buildings and Improvements [12] 2,576      
Total [12] 7,359      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2011      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | World Houston Int'l Business Center land - 2015 expansion [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 6,040      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 246      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 6,040      
Buildings and Improvements [12] 246      
Total [12] 6,286      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Ten West Crossing 7 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 584      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 3,488      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 588      
Buildings and Improvements [12] 3,484      
Total [12] 4,072      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | Ten West Crossing land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,127      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 797      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,135      
Buildings and Improvements [12] 789      
Total [12] 1,924      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | West Road III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 597      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 4,185      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 597      
Buildings and Improvements [12] 4,185      
Total [12] 4,782      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | West Road IV [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 621      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 4,064      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 621      
Buildings and Improvements [12] 4,064      
Total [12] 4,685      
Accumulated Depreciation [12] $ 5      
Year Acquired [12] 2012      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | West Road land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 483      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 718      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 484      
Buildings and Improvements [12] 717      
Total [12] 1,201      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2012      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Americas Ten Business Center II and III land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,365      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 1,079      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,365      
Buildings and Improvements [12] 1,079      
Total [12] 2,444      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2001      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge I [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 623      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 6,729      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 623      
Buildings and Improvements [12] 6,729      
Total [12] 7,352      
Accumulated Depreciation [12] $ 96      
Year Acquired [12] 2007      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge II [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 402      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 3,737      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 402      
Buildings and Improvements [12] 3,737      
Total [12] 4,139      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2007      
Year Constructed [12] 2015      
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge III [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 907      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 1,473      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 907      
Buildings and Improvements [12] 1,473      
Total [12] 2,380      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2007      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Alamo Ridge land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 356      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 487      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 355      
Buildings and Improvements [12] 488      
Total [12] 843      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2007      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Eisenhauer Point 1 & 2 [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,881      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 4,879      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,881      
Buildings and Improvements [12] 4,879      
Total [12] 6,760      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | TEXAS [Member] | Eisenhauer Point Business Park land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 2,513      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 324      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 2,519      
Buildings and Improvements [12] 318      
Total [12] 2,837      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | ARIZONA [Member] | Kyrene 202 VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to the Company [Abstract]        
Land 936      
Buildings and Improvements 0      
Costs Capitalized Subsequent to Acquisition 6,084      
Gross Amount at which Carried at Close of Period [Abstract]        
Land 936      
Buildings and Improvements 6,084      
Total 7,020      
Accumulated Depreciation $ 0      
Year Acquired 2011      
Year Constructed 2015      
Industrial Development [Member] | ARIZONA [Member] | Kyrene 202 Business Park Land Member        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,244      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 878      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,244      
Buildings and Improvements [12] 878      
Total [12] 2,122      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2011      
Year Constructed [12] n/a      
Industrial Development [Member] | ARIZONA [Member] | 35th Avenue Distribution Center - redevelopment [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 0      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 1,171      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 0      
Buildings and Improvements [12] 1,171      
Total [12] 1,171      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 1997      
Year Constructed [12] n/a      
Industrial Development [Member] | ARIZONA [Member] | Ten Sky Harbor [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,568      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 2,084      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,569      
Buildings and Improvements [12] 2,083      
Total [12] 3,652      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | ARIZONA [Member] | Falcon Field Business Center land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,315      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 50      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,315      
Buildings and Improvements [12] 50      
Total [12] 1,365      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2015      
Year Constructed [12] n/a      
Industrial Development [Member] | ARIZONA [Member] | Airport Distribution Center II land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 300      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 117      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 300      
Buildings and Improvements [12] 117      
Total [12] 417      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2000      
Year Constructed [12] n/a      
Industrial Development [Member] | NORTH CAROLINA [Member] | Steele Creek VI [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 867      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 2,037      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 869      
Buildings and Improvements [12] 2,035      
Total [12] 2,904      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2013/14      
Year Constructed [12] n/a      
Industrial Development [Member] | NORTH CAROLINA [Member] | Steele Creek land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 1,804      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 999      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 1,821      
Buildings and Improvements [12] 982      
Total [12] 2,803      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2013/14/15      
Year Constructed [12] n/a      
Industrial Development [Member] | NORTH CAROLINA [Member] | Airport Commerce Center III land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 855      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 763      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 855      
Buildings and Improvements [12] 763      
Total [12] 1,618      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2008      
Year Constructed [12] n/a      
Industrial Development [Member] | MISSISSIPPI | Metro Airport Commerce Center II land [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances [12] $ 0      
Initial Cost to the Company [Abstract]        
Land [12] 307      
Buildings and Improvements [12] 0      
Costs Capitalized Subsequent to Acquisition [12] 399      
Gross Amount at which Carried at Close of Period [Abstract]        
Land [12] 307      
Buildings and Improvements [12] 399      
Total [12] 706      
Accumulated Depreciation [12] $ 0      
Year Acquired [12] 2001      
Year Constructed [12] n/a      
[1] Changes in Real Estate Properties follow: Years Ended December 31,2015 2014 2013(In thousands)Balance at beginning of year $2,074,946 1,927,326 1,768,032Purchases of real estate properties 28,648 47,477 65,387Development of real estate properties95,032 97,696 76,240Improvements to real estate properties25,778 19,862 21,438Carrying amount of investments sold (4,750) (17,049) (3,475)Write-off of improvements (206) (366) (296)Balance at end of year (1) $2,219,448 2,074,946 1,927,326(1)Includes 20% noncontrolling interests in Castilian Research Center of $1,795,000 at December 31, 2015 and $1,794,000 at December 31, 2014 and in University Business Center of $6,670,000 and $6,536,000, respectively.Changes in the accumulated depreciation on real estate properties follow: Years Ended December 31,2015 2014 2013(In thousands)Balance at beginning of year $600,526 550,113 496,247Depreciation expense 59,882 57,303 54,284Accumulated depreciation on assets sold (2,748) (6,525) (126)Other (206) (365) (292)Balance at end of year $657,454 600,526 550,113
[2] The estimated aggregate cost of real estate properties at December 31, 2015 for federal income tax purposes was approximately $2,188,766,000 before estimated accumulated tax depreciation of $425,700,000. The federal income tax return for the year ended December 31, 2015, has not been filed and accordingly, this estimate is based on preliminary data.
[3] Includes 20% noncontrolling interests in Castilian Research Center of $1,795,000 at December 31, 2015 and $1,794,000 at December 31, 2014 and in University Business Center of $6,670,000 and $6,536,000, respectively.
[4] The Company computes depreciation using the straight-line method over the estimated useful lives of the buildings (generally 40 years) and improvements (generally 3 to 15 years).
[5] EastGroup has a $46,584,000 non-recourse first mortgage loan with an insurance company secured by Arion 18, Beltway Crossing VI & VII, Commerce Park II & III, Concord, Interstate V-VII, Lakeview, Ridge Creek II, Southridge IV & V and World Houston 32.
[6] EastGroup has a $61,312,000 non-recourse first mortgage loan with an insurance company secured by 40th Avenue, Beltway Crossing V, Centennial Park, Executive Airport, Ocean View, Techway Southwest IV, Wetmore 5-8 and World Houston 26, 28, 29 & 30.
[7] EastGroup has a $25,567,000 non-recourse first mortgage loan with an insurance company secured by Huntwood and Wiegman I.
[8] EastGroup has a $54,689,000 limited recourse first mortgage loan with an insurance company secured by Dominguez, Industry I & III, Kingsview, Shaw, Walnut and Washington. The loan has a recourse liability of $5 million which will be released based on the secured properties generating certain base rent amounts.
[9] EastGroup has a $50,971,000 non-recourse first mortgage loan with an insurance company secured by Arion 16, Broadway VI, Chino, East University I & II, Northpark, Santan 10 II, 55th Avenue and World Houston 1 & 2 and 21 & 23.
[10] EastGroup has a $55,223,000 non-recourse first mortgage loan with an insurance company secured by America Plaza, Central Green, Glenmont, Interstate I-III, Rojas, Stemmons Circle, Venture, West Loop and World Houston 3-9.
[11] EastGroup has a $53,563,000 non-recourse first mortgage loan with an insurance company secured by Alamo Downs, Arion 1-15 & 17, Rampart I-IV, Santan 10 I and World Houston 16.
[12] The Company transfers development properties to real estate properties the earlier of 80% occupancy or one year after completion of the shell construction.