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Schedule III - Real Estate And Accumulated Depreciation Property 1 (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances $ 370,804      
Initial cost of land 618,946      
Initial cost of buildings and improvements 1,784,679      
Adjustments to land basis 9,541      
Adjustment to basis 102,919      
Gross amount of land and improvements 628,487      
Gross amount of buildings and improvements 1,887,598      
Total gross amount 2,516,085 $ 2,180,252 $ 2,259,631 $ 3,800,865
Accumulated depreciation 348,337 $ 351,389 $ 394,904 $ 598,440
Retail [Member] | BEAR CREEK VILLAGE CENTER Wildomar, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 13,278      
Initial cost of land 3,523      
Initial cost of buildings and improvements 12,384      
Adjustments to land basis 0      
Adjustment to basis 136      
Gross amount of land and improvements 3,523      
Gross amount of buildings and improvements 12,520      
Total gross amount 16,043      
Accumulated depreciation 4,089      
Retail [Member] | BELLERIVE PLAZA Nicholasville, KY        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 6,464      
Initial cost of land 2,400      
Initial cost of buildings and improvements 7,749      
Adjustments to land basis (663)      
Adjustment to basis (4,645)      
Gross amount of land and improvements 1,737      
Gross amount of buildings and improvements 3,104      
Total gross amount 4,841      
Accumulated depreciation 132      
Retail [Member] | BENT TREE PLAZA Raleigh, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,983      
Initial cost of buildings and improvements 7,093      
Adjustments to land basis 0      
Adjustment to basis 1,471      
Gross amount of land and improvements 1,983      
Gross amount of buildings and improvements 8,564      
Total gross amount 10,547      
Accumulated depreciation 2,446      
Retail [Member] | BOYNTON COMMONS Miami, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 11,400      
Initial cost of buildings and improvements 17,315      
Adjustments to land basis 0      
Adjustment to basis 769      
Gross amount of land and improvements 11,400      
Gross amount of buildings and improvements 18,084      
Total gross amount 29,484      
Accumulated depreciation 5,116      
Retail [Member] | BROOKS CORNER San Antonio, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 12,828      
Initial cost of land 10,600      
Initial cost of buildings and improvements 13,648      
Adjustments to land basis 0      
Adjustment to basis 3,179      
Gross amount of land and improvements 10,600      
Gross amount of buildings and improvements 16,827      
Total gross amount 27,427      
Accumulated depreciation 7,111      
Retail [Member] | BUCKHEAD CROSSING Atlanta, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,565      
Initial cost of buildings and improvements 27,104      
Adjustments to land basis 0      
Adjustment to basis 692      
Gross amount of land and improvements 7,565      
Gross amount of buildings and improvements 27,796      
Total gross amount 35,361      
Accumulated depreciation 8,772      
Retail [Member] | CAMPUS MARKETPLACE San Marcos, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 41,000      
Initial cost of land 26,928      
Initial cost of buildings and improvements 43,445      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 26,928      
Gross amount of buildings and improvements 43,445      
Total gross amount 70,373      
Accumulated depreciation 1,556      
Retail [Member] | CARY PARK TOWN CENTER Cary, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,555      
Initial cost of buildings and improvements 17,280      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 5,555      
Gross amount of buildings and improvements 17,280      
Total gross amount 22,835      
Accumulated depreciation 264      
Retail [Member] | CENTERPLACE OF GREELEY Greeley, CO        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 14,363      
Initial cost of land 3,904      
Initial cost of buildings and improvements 14,715      
Adjustments to land basis 0      
Adjustment to basis 304      
Gross amount of land and improvements 3,904      
Gross amount of buildings and improvements 15,019      
Total gross amount 18,923      
Accumulated depreciation 5,114      
Retail [Member] | CHESAPEAKE COMMONS Chesapeake, VA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 2,669      
Initial cost of buildings and improvements 10,839      
Adjustments to land basis 0      
Adjustment to basis 62      
Gross amount of land and improvements 2,669      
Gross amount of buildings and improvements 10,901      
Total gross amount 13,570      
Accumulated depreciation 4,305      
Retail [Member] | CHEYENNE MEADOWS Colorado Springs, CO        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 2,023      
Initial cost of buildings and improvements 6,991      
Adjustments to land basis 0      
Adjustment to basis 399      
Gross amount of land and improvements 2,023      
Gross amount of buildings and improvements 7,390      
Total gross amount 9,413      
Accumulated depreciation 2,477      
Retail [Member] | COWETA CROSSING Newnan, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,143      
Initial cost of buildings and improvements 4,590      
Adjustments to land basis 0      
Adjustment to basis (15)      
Gross amount of land and improvements 1,143      
Gross amount of buildings and improvements 4,575      
Total gross amount 5,718      
Accumulated depreciation 1,520      
Retail [Member] | CROSSROADS AT CHESAPEAKE SQUARE Chesapeake, VA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,970      
Initial cost of buildings and improvements 13,732      
Adjustments to land basis (296)      
Adjustment to basis 1,789      
Gross amount of land and improvements 3,674      
Gross amount of buildings and improvements 15,521      
Total gross amount 19,195      
Accumulated depreciation 6,377      
Retail [Member] | CUSTER CREEK VILLAGE Richardson, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 4,750      
Initial cost of buildings and improvements 12,245      
Adjustments to land basis 0      
Adjustment to basis 293      
Gross amount of land and improvements 4,750      
Gross amount of buildings and improvements 12,538      
Total gross amount 17,288      
Accumulated depreciation 4,729      
Retail [Member] | ELDRIDGE TOWN CENTER Houston, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,200      
Initial cost of buildings and improvements 16,663      
Adjustments to land basis 0      
Adjustment to basis 886      
Gross amount of land and improvements 3,200      
Gross amount of buildings and improvements 17,549      
Total gross amount 20,749      
Accumulated depreciation 7,765      
Retail [Member] | GARDEN VILLAGE San Pedro, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,188      
Initial cost of buildings and improvements 16,522      
Adjustments to land basis 0      
Adjustment to basis 139      
Gross amount of land and improvements 3,188      
Gross amount of buildings and improvements 16,661      
Total gross amount 19,849      
Accumulated depreciation 5,219      
Retail [Member] | GATEWAY MARKET CENTER Tampa, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 13,600      
Initial cost of buildings and improvements 4,992      
Adjustments to land basis 0      
Adjustment to basis 1,082      
Gross amount of land and improvements 13,600      
Gross amount of buildings and improvements 6,074      
Total gross amount 19,674      
Accumulated depreciation 1,982      
Retail [Member] | GRAFTON COMMONS SHOPPING CENTER Grafton, WI        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,200      
Initial cost of buildings and improvements 26,984      
Adjustments to land basis 0      
Adjustment to basis 197      
Gross amount of land and improvements 7,200      
Gross amount of buildings and improvements 27,181      
Total gross amount 34,381      
Accumulated depreciation 8,043      
Retail [Member] | HIRAM PAVILION Hiram, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 4,600      
Initial cost of buildings and improvements 16,832      
Adjustments to land basis 0      
Adjustment to basis 2,892      
Gross amount of land and improvements 4,600      
Gross amount of buildings and improvements 19,724      
Total gross amount 24,324      
Accumulated depreciation 5,819      
Retail [Member] | KYLE MARKETPLACE Kyle, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 6,076      
Initial cost of buildings and improvements 48,220      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 6,076      
Gross amount of buildings and improvements 48,220      
Total gross amount 54,296      
Accumulated depreciation 429      
Retail [Member] | LAKEPORT COMMONS Sioux City, IA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,800      
Initial cost of buildings and improvements 39,984      
Adjustments to land basis (628)      
Adjustment to basis (14,173)      
Gross amount of land and improvements 7,172      
Gross amount of buildings and improvements 25,811      
Total gross amount 32,983      
Accumulated depreciation 1,074      
Retail [Member] | MARKET AT MORSE / HAMILTON Columbus, OH        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 4,490      
Initial cost of buildings and improvements 8,734      
Adjustments to land basis (907)      
Adjustment to basis (3,090)      
Gross amount of land and improvements 3,583      
Gross amount of buildings and improvements 5,644      
Total gross amount 9,227      
Accumulated depreciation 1,261      
Retail [Member] | MARKET AT WESTLAKE Westlake Hills, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,200      
Initial cost of buildings and improvements 6,274      
Adjustments to land basis (64)      
Adjustment to basis 80      
Gross amount of land and improvements 1,136      
Gross amount of buildings and improvements 6,354      
Total gross amount 7,490      
Accumulated depreciation 2,440      
Retail [Member] | MCKINNEY TOWN CENTER McKinney, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 16,297      
Initial cost of buildings and improvements 22,562      
Adjustments to land basis 0      
Adjustment to basis 1,531      
Gross amount of land and improvements 16,297      
Gross amount of buildings and improvements 24,093      
Total gross amount 40,390      
Accumulated depreciation 7,048      
Retail [Member] | NORTHCROSS COMMONS Charlotte, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,591      
Initial cost of buildings and improvements 21,303      
Adjustments to land basis 0      
Adjustment to basis 4      
Gross amount of land and improvements 7,591      
Gross amount of buildings and improvements 21,307      
Total gross amount 28,898      
Accumulated depreciation 945      
Retail [Member] | NORTHWEST MARKETPLACE Houston, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,870      
Initial cost of buildings and improvements 30,340      
Adjustments to land basis (31)      
Adjustment to basis 1,019      
Gross amount of land and improvements 3,839      
Gross amount of buildings and improvements 31,359      
Total gross amount 35,198      
Accumulated depreciation 11,595      
Retail [Member] | OLD GROVE MARKETPLACE Oceanside, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 12,545      
Initial cost of buildings and improvements 8,902      
Adjustments to land basis 0      
Adjustment to basis 30      
Gross amount of land and improvements 12,545      
Gross amount of buildings and improvements 8,932      
Total gross amount 21,477      
Accumulated depreciation 459      
Retail [Member] | PARAISO PARC AND WESTFORK PLAZA Pembroke Pines, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 28,267      
Initial cost of buildings and improvements 124,020      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 28,267      
Gross amount of buildings and improvements 124,020      
Total gross amount 152,287      
Accumulated depreciation 3,528      
Retail [Member] | PARKWAY CENTRE NORTH OUTLOT B Grove City, OH        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 16,100      
Initial cost of land 5,580      
Initial cost of buildings and improvements 18,636      
Adjustments to land basis 0      
Adjustment to basis 2,174      
Gross amount of land and improvements 5,580      
Gross amount of buildings and improvements 20,810      
Total gross amount 26,390      
Accumulated depreciation 8,237      
Retail [Member] | PAVILION AT LAQUINTA LaQuinta, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 24,019      
Initial cost of land 15,200      
Initial cost of buildings and improvements 20,947      
Adjustments to land basis 0      
Adjustment to basis 912      
Gross amount of land and improvements 15,200      
Gross amount of buildings and improvements 21,859      
Total gross amount 37,059      
Accumulated depreciation 6,858      
Retail [Member] | PEACHLAND PROMENADE Port Charlotte, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,742      
Initial cost of buildings and improvements 6,502      
Adjustments to land basis (911)      
Adjustment to basis (3,637)      
Gross amount of land and improvements 831      
Gross amount of buildings and improvements 2,865      
Total gross amount 3,696      
Accumulated depreciation 120      
Retail [Member] | PLANTATION GROVE Ocoee, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 7,300      
Initial cost of land 3,705      
Initial cost of buildings and improvements 6,300      
Adjustments to land basis 0      
Adjustment to basis 486      
Gross amount of land and improvements 3,705      
Gross amount of buildings and improvements 6,786      
Total gross amount 10,491      
Accumulated depreciation 953      
Retail [Member] | PLAZA MIDTOWN Atlanta, GL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,295      
Initial cost of buildings and improvements 23,946      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 5,295      
Gross amount of buildings and improvements 23,946      
Total gross amount 29,241      
Accumulated depreciation 267      
Retail [Member] | POPLIN PLACE Monroe, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 6,100      
Initial cost of buildings and improvements 27,790      
Adjustments to land basis 0      
Adjustment to basis 1,059      
Gross amount of land and improvements 6,100      
Gross amount of buildings and improvements 28,849      
Total gross amount 34,949      
Accumulated depreciation 9,709      
Retail [Member] | PROMENADE FULTONDALE Fultondale, AL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,540      
Initial cost of buildings and improvements 22,414      
Adjustments to land basis (1,022)      
Adjustment to basis 165      
Gross amount of land and improvements 4,518      
Gross amount of buildings and improvements 22,579      
Total gross amount 27,097      
Accumulated depreciation 7,097      
Retail [Member] | QUEBEC SQUARE Denver, CO        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 23,550      
Initial cost of land 9,579      
Initial cost of buildings and improvements 40,086      
Adjustments to land basis 0      
Adjustment to basis 664      
Gross amount of land and improvements 9,579      
Gross amount of buildings and improvements 40,750      
Total gross amount 50,329      
Accumulated depreciation 4,384      
Retail [Member] | RENAISSANCE CENTER Durham, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 15,481      
Initial cost of land 26,713      
Initial cost of buildings and improvements 96,141      
Adjustments to land basis 0      
Adjustment to basis 2,160      
Gross amount of land and improvements 26,713      
Gross amount of buildings and improvements 98,301      
Total gross amount 125,014      
Accumulated depreciation 6,233      
Retail [Member] | RIO PINOR PLAZA Orlando, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,171      
Initial cost of buildings and improvements 26,903      
Adjustments to land basis 0      
Adjustment to basis 2      
Gross amount of land and improvements 5,171      
Gross amount of buildings and improvements 26,905      
Total gross amount 32,076      
Accumulated depreciation 2,073      
Retail [Member] | RIVER OAKS SHOPPING CENTER Valencia, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 24,598      
Initial cost of buildings and improvements 88,418      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 24,598      
Gross amount of buildings and improvements 88,418      
Total gross amount 113,016      
Accumulated depreciation 1,008      
Retail [Member] | RIVERSTONE SHOPPING CENTER Missouri City, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 18,350      
Initial cost of land 12,000      
Initial cost of buildings and improvements 26,395      
Adjustments to land basis 0      
Adjustment to basis 539      
Gross amount of land and improvements 12,000      
Gross amount of buildings and improvements 26,934      
Total gross amount 38,934      
Accumulated depreciation 10,256      
Retail [Member] | RIVERVIEW VILLAGE Arlington, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 6,000      
Initial cost of buildings and improvements 9,649      
Adjustments to land basis 0      
Adjustment to basis 777      
Gross amount of land and improvements 6,000      
Gross amount of buildings and improvements 10,426      
Total gross amount 16,426      
Accumulated depreciation 3,939      
Retail [Member] | RIVERWALK MARKET Flower Mound, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,931      
Initial cost of buildings and improvements 23,922      
Adjustments to land basis 0      
Adjustment to basis 1      
Gross amount of land and improvements 5,931      
Gross amount of buildings and improvements 23,923      
Total gross amount 29,854      
Accumulated depreciation 1,022      
Retail [Member] | ROSE CREEK Woodstock, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,443      
Initial cost of buildings and improvements 5,630      
Adjustments to land basis 0      
Adjustment to basis 308      
Gross amount of land and improvements 1,443      
Gross amount of buildings and improvements 5,938      
Total gross amount 7,381      
Accumulated depreciation 1,886      
Retail [Member] | SARASOTA PAVILION Sarasota, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 12,000      
Initial cost of buildings and improvements 25,823      
Adjustments to land basis 0      
Adjustment to basis 998      
Gross amount of land and improvements 12,000      
Gross amount of buildings and improvements 26,821      
Total gross amount 38,821      
Accumulated depreciation 7,636      
Retail [Member] | SCOFIELD CROSSING Austin, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 8,100      
Initial cost of buildings and improvements 4,992      
Adjustments to land basis (576)      
Adjustment to basis 116      
Gross amount of land and improvements 7,524      
Gross amount of buildings and improvements 5,108      
Total gross amount 12,632      
Accumulated depreciation 1,998      
Retail [Member] | SHERMAN TOWN CENTER Sherman, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 4,850      
Initial cost of buildings and improvements 49,273      
Adjustments to land basis 0      
Adjustment to basis 648      
Gross amount of land and improvements 4,850      
Gross amount of buildings and improvements 49,921      
Total gross amount 54,771      
Accumulated depreciation 19,733      
Retail [Member] | SHERMAN TOWN CENTER II Sherman, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,000      
Initial cost of buildings and improvements 14,805      
Adjustments to land basis 0      
Adjustment to basis (20)      
Gross amount of land and improvements 3,000      
Gross amount of buildings and improvements 14,785      
Total gross amount 17,785      
Accumulated depreciation 3,831      
Retail [Member] | SHOPS AT THE GALLERIA Austin, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 52,104      
Initial cost of buildings and improvements 75,651      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 52,104      
Gross amount of buildings and improvements 75,651      
Total gross amount 127,755      
Accumulated depreciation 4,849      
Retail [Member] | SIEGEN PLAZA East Baton Rouge, LA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 16,600      
Initial cost of land 9,340      
Initial cost of buildings and improvements 20,251      
Adjustments to land basis 0      
Adjustment to basis 2,547      
Gross amount of land and improvements 9,340      
Gross amount of buildings and improvements 22,798      
Total gross amount 32,138      
Accumulated depreciation 7,340      
Retail [Member] | SILVERLAKE Erlanger, KY        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 2,031      
Initial cost of buildings and improvements 6,975      
Adjustments to land basis 0      
Adjustment to basis (10)      
Gross amount of land and improvements 2,031      
Gross amount of buildings and improvements 6,965      
Total gross amount 8,996      
Accumulated depreciation 2,421      
Retail [Member] | SONTERRA VILLAGE San Antonio, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,150      
Initial cost of buildings and improvements 15,095      
Adjustments to land basis 0      
Adjustment to basis 273      
Gross amount of land and improvements 5,150      
Gross amount of buildings and improvements 15,368      
Total gross amount 20,518      
Accumulated depreciation 1,077      
Retail [Member] | STEVENSON RANCH Stevenson Ranch, CA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 29,519      
Initial cost of buildings and improvements 39,190      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 29,519      
Gross amount of buildings and improvements 39,190      
Total gross amount 68,709      
Accumulated depreciation 2,441      
Retail [Member] | STONECREST MARKETPLACE Lithonia, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 37,866      
Initial cost of land 6,150      
Initial cost of buildings and improvements 23,321      
Adjustments to land basis 0      
Adjustment to basis 781      
Gross amount of land and improvements 6,150      
Gross amount of buildings and improvements 24,102      
Total gross amount 30,252      
Accumulated depreciation 6,987      
Retail [Member] | STREETS OF CRANBERRY Cranberry Township, PA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 4,300      
Initial cost of buildings and improvements 20,215      
Adjustments to land basis 0      
Adjustment to basis 8,529      
Gross amount of land and improvements 4,300      
Gross amount of buildings and improvements 28,744      
Total gross amount 33,044      
Accumulated depreciation 10,499      
Retail [Member] | SUNCREST VILLAGE Orlando, FL        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 8,400      
Initial cost of land 6,742      
Initial cost of buildings and improvements 6,403      
Adjustments to land basis 0      
Adjustment to basis 284      
Gross amount of land and improvements 6,742      
Gross amount of buildings and improvements 6,687      
Total gross amount 13,429      
Accumulated depreciation 963      
Retail [Member] | SYCAMORE COMMONS Matthews, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 12,500      
Initial cost of buildings and improvements 31,265      
Adjustments to land basis 0      
Adjustment to basis 1,402      
Gross amount of land and improvements 12,500      
Gross amount of buildings and improvements 32,667      
Total gross amount 45,167      
Accumulated depreciation 10,338      
Retail [Member] | THE CENTER AT HUGH HOWELL Tucker, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 2,250      
Initial cost of buildings and improvements 11,091      
Adjustments to land basis 0      
Adjustment to basis 806      
Gross amount of land and improvements 2,250      
Gross amount of buildings and improvements 11,897      
Total gross amount 14,147      
Accumulated depreciation 4,762      
Retail [Member] | THE PARKE Cedar Park, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 9,271      
Initial cost of buildings and improvements 83,078      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 9,271      
Gross amount of buildings and improvements 83,078      
Total gross amount 92,349      
Accumulated depreciation 977      
Retail [Member] | THE POINTE AT CREEDMOOR Raleigh, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,507      
Initial cost of buildings and improvements 5,454      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 7,507      
Gross amount of buildings and improvements 5,454      
Total gross amount 12,961      
Accumulated depreciation 331      
Retail [Member] | THE SHOPS AT TOWN CENTER Germantown, MD        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 19,998      
Initial cost of buildings and improvements 29,776      
Adjustments to land basis 0      
Adjustment to basis 0      
Gross amount of land and improvements 19,998      
Gross amount of buildings and improvements 29,776      
Total gross amount 49,774      
Accumulated depreciation 870      
Retail [Member] | THE SHOPS AT WALNUT CREEK Westminster, CO        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 28,630      
Initial cost of land 10,132      
Initial cost of buildings and improvements 44,089      
Adjustments to land basis 0      
Adjustment to basis 1      
Gross amount of land and improvements 10,132      
Gross amount of buildings and improvements 44,090      
Total gross amount 54,222      
Accumulated depreciation 4,398      
Retail [Member] | THOMAS CROSSROADS Newnan, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,622      
Initial cost of buildings and improvements 8,322      
Adjustments to land basis 0      
Adjustment to basis 747      
Gross amount of land and improvements 1,622      
Gross amount of buildings and improvements 9,069      
Total gross amount 10,691      
Accumulated depreciation 2,878      
Retail [Member] | TOMBALL TOWN CENTER Tomball, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,938      
Initial cost of buildings and improvements 14,233      
Adjustments to land basis 360      
Adjustment to basis 6,439      
Gross amount of land and improvements 2,298      
Gross amount of buildings and improvements 20,672      
Total gross amount 22,970      
Accumulated depreciation 7,950      
Retail [Member] | TULSA HILLS SHOPPING CENTER Tulsa, OK        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 8,000      
Initial cost of buildings and improvements 42,272      
Adjustments to land basis 4,770      
Adjustment to basis 10,587      
Gross amount of land and improvements 12,770      
Gross amount of buildings and improvements 52,859      
Total gross amount 65,629      
Accumulated depreciation 13,812      
Retail [Member] | UNIVERSITY OAKS SHOPPING CENTER Round Rock, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 27,000      
Initial cost of land 7,250      
Initial cost of buildings and improvements 25,326      
Adjustments to land basis 0      
Adjustment to basis 7,772      
Gross amount of land and improvements 7,250      
Gross amount of buildings and improvements 33,098      
Total gross amount 40,348      
Accumulated depreciation 8,840      
Retail [Member] | WALDEN PARK SHOPPING CENTER Austin, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 3,183      
Initial cost of buildings and improvements 5,278      
Adjustments to land basis 0      
Adjustment to basis 63      
Gross amount of land and improvements 3,183      
Gross amount of buildings and improvements 5,341      
Total gross amount 8,524      
Accumulated depreciation 868      
Retail [Member] | WEST CREEK SHOPPING CENTER Austin, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 5,151      
Initial cost of buildings and improvements 8,659      
Adjustments to land basis 0      
Adjustment to basis 10      
Gross amount of land and improvements 5,151      
Gross amount of buildings and improvements 8,669      
Total gross amount 13,820      
Accumulated depreciation 1,371      
Retail [Member] | WESTPARK SHOPPING CENTER Glen Allen, VA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 7,462      
Initial cost of buildings and improvements 24,164      
Adjustments to land basis 0      
Adjustment to basis 80      
Gross amount of land and improvements 7,462      
Gross amount of buildings and improvements 24,244      
Total gross amount 31,706      
Accumulated depreciation 2,330      
Retail [Member] | WHITE OAK CROSSING Garner, NC        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 52,000      
Initial cost of land 19,000      
Initial cost of buildings and improvements 70,275      
Adjustments to land basis 0      
Adjustment to basis 1,800      
Gross amount of land and improvements 19,000      
Gross amount of buildings and improvements 72,075      
Total gross amount 91,075      
Accumulated depreciation 16,080      
Retail [Member] | WINDERMERE VILLAGE Houston, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 1,220      
Initial cost of buildings and improvements 6,331      
Adjustments to land basis 0      
Adjustment to basis 1,203      
Gross amount of land and improvements 1,220      
Gross amount of buildings and improvements 7,534      
Total gross amount 8,754      
Accumulated depreciation 3,273      
Retail [Member] | WINDWARD COMMONS Alpharetta, GA        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 12,823      
Initial cost of buildings and improvements 13,779      
Adjustments to land basis 0      
Adjustment to basis 42      
Gross amount of land and improvements 12,823      
Gross amount of buildings and improvements 13,821      
Total gross amount 26,644      
Accumulated depreciation 678      
Retail [Member] | WOODBRIDGE Wylie, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 0      
Initial cost of buildings and improvements 0      
Adjustments to land basis 9,509      
Adjustment to basis 39,824      
Gross amount of land and improvements 9,509      
Gross amount of buildings and improvements 39,824      
Total gross amount 49,333      
Accumulated depreciation 10,860      
Retail [Member] | WOODLAKE CROSSING San Antonio, TX        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 7,575      
Initial cost of land 3,419      
Initial cost of buildings and improvements 14,152      
Adjustments to land basis 0      
Adjustment to basis 3,475      
Gross amount of land and improvements 3,419      
Gross amount of buildings and improvements 17,627      
Total gross amount 21,046      
Accumulated depreciation 5,149      
Corporate Assets [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost of land 0      
Initial cost of buildings and improvements 0      
Adjustments to land basis 0      
Adjustment to basis 13,881      
Gross amount of land and improvements 0      
Gross amount of buildings and improvements 13,881      
Total gross amount 13,881      
Accumulated depreciation $ 7,140