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SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances $ 1,242,265      
Initial cost to company        
Land 375,422      
Building and improvements 1,093,752      
Costs capitalized subsequent to acquisition 615,469      
Gross amount at which carried at close of period        
Land 389,080      
Building and improvements 1,695,562      
Total 2,084,642 $ 2,022,804 $ 1,984,172 $ 2,045,258
Accumulated depreciation and amortization 509,112 $ 467,503 $ 421,756 $ 436,137
Aggregate cost for federal income tax purposes 1,800,000      
Real Estate        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 1,242,265      
Initial cost to company        
Land 375,422      
Building and improvements 1,093,752      
Costs capitalized subsequent to acquisition 611,593      
Gross amount at which carried at close of period        
Land 389,080      
Building and improvements 1,691,686      
Total 2,080,766      
Accumulated depreciation and amortization 508,568      
Real Estate | SHOPPING CENTERS AND MALLS | Allentown, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 28,602      
Initial cost to company        
Land 187      
Building and improvements 15,580      
Costs capitalized subsequent to acquisition 1,926      
Gross amount at which carried at close of period        
Land 187      
Building and improvements 17,506      
Total 17,693      
Accumulated depreciation and amortization 13,229      
Real Estate | SHOPPING CENTERS AND MALLS | Baltimore (Towson), MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 14,902      
Initial cost to company        
Land 581      
Building and improvements 3,227      
Costs capitalized subsequent to acquisition 10,820      
Gross amount at which carried at close of period        
Land 581      
Building and improvements 14,047      
Total 14,628      
Accumulated depreciation and amortization 6,228      
Real Estate | SHOPPING CENTERS AND MALLS | Bensalem, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 14,197      
Initial cost to company        
Land 2,727      
Building and improvements 6,698      
Costs capitalized subsequent to acquisition 2,014      
Gross amount at which carried at close of period        
Land 2,728      
Building and improvements 8,712      
Total 11,440      
Accumulated depreciation and amortization 3,826      
Real Estate | SHOPPING CENTERS AND MALLS | Bergen Town Center - East, Paramus, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 6,305      
Building and improvements 0      
Costs capitalized subsequent to acquisition 32,387      
Gross amount at which carried at close of period        
Land 6,305      
Building and improvements 32,387      
Total 38,692      
Accumulated depreciation and amortization 5,287      
Real Estate | SHOPPING CENTERS AND MALLS | Bergen Town Center - West, Paramus, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 300,000      
Initial cost to company        
Land 15,812      
Building and improvements 82,240      
Costs capitalized subsequent to acquisition 333,425      
Gross amount at which carried at close of period        
Land 33,563      
Building and improvements 397,914      
Total 431,477      
Accumulated depreciation and amortization 88,449      
Real Estate | SHOPPING CENTERS AND MALLS | Bethlehem, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 5,334      
Initial cost to company        
Land 827      
Building and improvements 5,200      
Costs capitalized subsequent to acquisition 1,355      
Gross amount at which carried at close of period        
Land 839      
Building and improvements 6,543      
Total 7,382      
Accumulated depreciation and amortization 5,671      
Real Estate | SHOPPING CENTERS AND MALLS | Brick, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 30,485      
Initial cost to company        
Land 1,391      
Building and improvements 11,179      
Costs capitalized subsequent to acquisition 6,846      
Gross amount at which carried at close of period        
Land 1,391      
Building and improvements 18,025      
Total 19,416      
Accumulated depreciation and amortization 13,015      
Real Estate | SHOPPING CENTERS AND MALLS | Bronx (Bruckner Boulevard), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 66,100      
Building and improvements 259,503      
Costs capitalized subsequent to acquisition (60,215)      
Gross amount at which carried at close of period        
Land 55,456      
Building and improvements 209,932      
Total 265,388      
Accumulated depreciation and amortization 10,749      
Real Estate | SHOPPING CENTERS AND MALLS | Bronx (1750-1780 Gun Hill Road), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 6,427      
Building and improvements 11,885      
Costs capitalized subsequent to acquisition 20,066      
Gross amount at which carried at close of period        
Land 6,428      
Building and improvements 31,950      
Total 38,378      
Accumulated depreciation and amortization 6,009      
Real Estate | SHOPPING CENTERS AND MALLS | Broomall, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 10,196      
Initial cost to company        
Land 850      
Building and improvements 2,171      
Costs capitalized subsequent to acquisition 1,399      
Gross amount at which carried at close of period        
Land 850      
Building and improvements 3,570      
Total 4,420      
Accumulated depreciation and amortization 2,635      
Real Estate | SHOPPING CENTERS AND MALLS | Buffalo (Amherst), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 5,743      
Building and improvements 4,056      
Costs capitalized subsequent to acquisition 12,752      
Gross amount at which carried at close of period        
Land 5,107      
Building and improvements 17,444      
Total 22,551      
Accumulated depreciation and amortization 6,975      
Real Estate | SHOPPING CENTERS AND MALLS | Cambridge (ground and building leased through 2033), MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 260      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 260      
Total 260      
Accumulated depreciation and amortization 203      
Real Estate | SHOPPING CENTERS AND MALLS | Carlstadt (ground leased through 2050), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 16,458      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 16,458      
Total 16,458      
Accumulated depreciation and amortization 3,372      
Real Estate | SHOPPING CENTERS AND MALLS | Charleston (ground leased through 2063), SC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 3,634      
Costs capitalized subsequent to acquisition 1      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 3,635      
Total 3,635      
Accumulated depreciation and amortization 841      
Real Estate | SHOPPING CENTERS AND MALLS | Cherry Hill, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 13,229      
Initial cost to company        
Land 5,864      
Building and improvements 2,694      
Costs capitalized subsequent to acquisition 4,306      
Gross amount at which carried at close of period        
Land 4,864      
Building and improvements 7,999      
Total 12,863      
Accumulated depreciation and amortization 4,240      
Real Estate | SHOPPING CENTERS AND MALLS | Chicopee, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 7,922      
Initial cost to company        
Land 895      
Building and improvements 0      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 895      
Building and improvements 0      
Total 895      
Accumulated depreciation and amortization 0      
Real Estate | SHOPPING CENTERS AND MALLS | Commack (ground and building leased through 2021), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 43      
Costs capitalized subsequent to acquisition 184      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 227      
Total 227      
Accumulated depreciation and amortization 159      
Real Estate | SHOPPING CENTERS AND MALLS | Dewitt (ground leased through 2041), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 7,116      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 7,116      
Total 7,116      
Accumulated depreciation and amortization 1,629      
Real Estate | SHOPPING CENTERS AND MALLS | Dover, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 12,549      
Initial cost to company        
Land 559      
Building and improvements 6,363      
Costs capitalized subsequent to acquisition 3,388      
Gross amount at which carried at close of period        
Land 559      
Building and improvements 9,752      
Total 10,311      
Accumulated depreciation and amortization 5,620      
Real Estate | SHOPPING CENTERS AND MALLS | East Brunswick, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 34,982      
Initial cost to company        
Land 2,417      
Building and improvements 17,169      
Costs capitalized subsequent to acquisition 6,014      
Gross amount at which carried at close of period        
Land 2,417      
Building and improvements 23,183      
Total 25,600      
Accumulated depreciation and amortization 16,455      
Real Estate | SHOPPING CENTERS AND MALLS | East Hanover (200 - 240 Route 10 West), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 36,498      
Initial cost to company        
Land 2,232      
Building and improvements 18,241      
Costs capitalized subsequent to acquisition 7,161      
Gross amount at which carried at close of period        
Land 2,671      
Building and improvements 24,963      
Total 27,634      
Accumulated depreciation and amortization 14,881      
Real Estate | SHOPPING CENTERS AND MALLS | East Hanover (280 Route 10 West), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 4,340      
Initial cost to company        
Land 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 7,000      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 7,000      
Total 7,000      
Accumulated depreciation and amortization 1,670      
Real Estate | SHOPPING CENTERS AND MALLS | East Rutherford, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 12,968      
Initial cost to company        
Land 0      
Building and improvements 36,727      
Costs capitalized subsequent to acquisition 60      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 36,787      
Total 36,787      
Accumulated depreciation and amortization 5,986      
Real Estate | SHOPPING CENTERS AND MALLS | Eatontown, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 4,653      
Building and improvements 4,999      
Costs capitalized subsequent to acquisition 326      
Gross amount at which carried at close of period        
Land 4,653      
Building and improvements 5,325      
Total 9,978      
Accumulated depreciation and amortization 1,532      
Real Estate | SHOPPING CENTERS AND MALLS | Englewood, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 11,537      
Initial cost to company        
Land 2,300      
Building and improvements 17,245      
Costs capitalized subsequent to acquisition (8,390)      
Gross amount at which carried at close of period        
Land 1,495      
Building and improvements 9,660      
Total 11,155      
Accumulated depreciation and amortization 848      
Real Estate | SHOPPING CENTERS AND MALLS | Freeport (240 West Sunrise Highway) (ground and building leased through 2040), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 260      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 260      
Total 260      
Accumulated depreciation and amortization 173      
Real Estate | SHOPPING CENTERS AND MALLS | Freeport (437 East Sunrise Highway), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 20,393      
Initial cost to company        
Land 1,231      
Building and improvements 4,747      
Costs capitalized subsequent to acquisition 3,484      
Gross amount at which carried at close of period        
Land 1,231      
Building and improvements 8,231      
Total 9,462      
Accumulated depreciation and amortization 5,610      
Real Estate | SHOPPING CENTERS AND MALLS | Garfield, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 45      
Building and improvements 8,068      
Costs capitalized subsequent to acquisition 27,088      
Gross amount at which carried at close of period        
Land 45      
Building and improvements 35,156      
Total 35,201      
Accumulated depreciation and amortization 8,515      
Real Estate | SHOPPING CENTERS AND MALLS | Glen Burnie, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 462      
Building and improvements 2,571      
Costs capitalized subsequent to acquisition 1,932      
Gross amount at which carried at close of period        
Land 462      
Building and improvements 4,503      
Total 4,965      
Accumulated depreciation and amortization 3,222      
Real Estate | SHOPPING CENTERS AND MALLS | Glenolden, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 6,536      
Initial cost to company        
Land 850      
Building and improvements 1,820      
Costs capitalized subsequent to acquisition 612      
Gross amount at which carried at close of period        
Land 850      
Building and improvements 2,433      
Total 3,283      
Accumulated depreciation and amortization 2,182      
Real Estate | SHOPPING CENTERS AND MALLS | Hackensack, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 38,694      
Initial cost to company        
Land 692      
Building and improvements 10,219      
Costs capitalized subsequent to acquisition 4,183      
Gross amount at which carried at close of period        
Land 692      
Building and improvements 14,403      
Total 15,095      
Accumulated depreciation and amortization 9,986      
Real Estate | SHOPPING CENTERS AND MALLS | Hazlet, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 7,400      
Building and improvements 9,413      
Costs capitalized subsequent to acquisition (2,168)      
Gross amount at which carried at close of period        
Land 7,400      
Building and improvements 7,245      
Total 14,645      
Accumulated depreciation and amortization 1,555      
Real Estate | SHOPPING CENTERS AND MALLS | Queens, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 14,537      
Building and improvements 12,304      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 14,537      
Building and improvements 12,305      
Total 26,842      
Accumulated depreciation and amortization 8      
Real Estate | SHOPPING CENTERS AND MALLS | Huntington, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 15,896      
Initial cost to company        
Land 21,200      
Building and improvements 33,667      
Costs capitalized subsequent to acquisition 1,975      
Gross amount at which carried at close of period        
Land 21,200      
Building and improvements 35,642      
Total 56,842      
Accumulated depreciation and amortization 7,150      
Real Estate | SHOPPING CENTERS AND MALLS | Inwood, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 12,419      
Building and improvements 19,097      
Costs capitalized subsequent to acquisition 1,214      
Gross amount at which carried at close of period        
Land 12,419      
Building and improvements 20,311      
Total 32,730      
Accumulated depreciation and amortization 5,586      
Real Estate | SHOPPING CENTERS AND MALLS | Jersey City, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 19,347      
Initial cost to company        
Land 652      
Building and improvements 7,495      
Costs capitalized subsequent to acquisition 719      
Gross amount at which carried at close of period        
Land 652      
Building and improvements 8,214      
Total 8,866      
Accumulated depreciation and amortization 2,969      
Real Estate | SHOPPING CENTERS AND MALLS | Kearny, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 309      
Building and improvements 3,376      
Costs capitalized subsequent to acquisition 6,014      
Gross amount at which carried at close of period        
Land 309      
Building and improvements 9,390      
Total 9,699      
Accumulated depreciation and amortization 3,072      
Real Estate | SHOPPING CENTERS AND MALLS | Lancaster, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 5,151      
Initial cost to company        
Land 3,140      
Building and improvements 63      
Costs capitalized subsequent to acquisition 1,259      
Gross amount at which carried at close of period        
Land 3,140      
Building and improvements 1,323      
Total 4,463      
Accumulated depreciation and amortization 569      
Real Estate | SHOPPING CENTERS AND MALLS | Las Catalinas, Puerto Rico        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 130,000      
Initial cost to company        
Land 15,280      
Building and improvements 64,370      
Costs capitalized subsequent to acquisition 11,652      
Gross amount at which carried at close of period        
Land 15,280      
Building and improvements 76,022      
Total 91,302      
Accumulated depreciation and amortization 32,438      
Real Estate | SHOPPING CENTERS AND MALLS | Lawnside, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 10,196      
Initial cost to company        
Land 1,226      
Building and improvements 3,164      
Costs capitalized subsequent to acquisition 1,204      
Gross amount at which carried at close of period        
Land 1,226      
Building and improvements 4,368      
Total 5,594      
Accumulated depreciation and amortization 4,270      
Real Estate | SHOPPING CENTERS AND MALLS | Lodi (Route 17 North), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 10,824      
Initial cost to company        
Land 238      
Building and improvements 9,446      
Costs capitalized subsequent to acquisition (1)      
Gross amount at which carried at close of period        
Land 238      
Building and improvements 9,446      
Total 9,684      
Accumulated depreciation and amortization 3,836      
Real Estate | SHOPPING CENTERS AND MALLS | Lodi (Washington Street), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 7,606      
Building and improvements 13,125      
Costs capitalized subsequent to acquisition 2,644      
Gross amount at which carried at close of period        
Land 7,606      
Building and improvements 15,769      
Total 23,375      
Accumulated depreciation and amortization 3,944      
Real Estate | SHOPPING CENTERS AND MALLS | Manalapan, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 20,079      
Initial cost to company        
Land 725      
Building and improvements 7,189      
Costs capitalized subsequent to acquisition 6,150      
Gross amount at which carried at close of period        
Land 1,046      
Building and improvements 13,018      
Total 14,064      
Accumulated depreciation and amortization 8,602      
Real Estate | SHOPPING CENTERS AND MALLS | Marlton, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 16,471      
Initial cost to company        
Land 1,611      
Building and improvements 3,464      
Costs capitalized subsequent to acquisition 10,695      
Gross amount at which carried at close of period        
Land 1,454      
Building and improvements 14,316      
Total 15,770      
Accumulated depreciation and amortization 9,147      
Real Estate | SHOPPING CENTERS AND MALLS | Middletown, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 16,576      
Initial cost to company        
Land 283      
Building and improvements 5,248      
Costs capitalized subsequent to acquisition 2,893      
Gross amount at which carried at close of period        
Land 283      
Building and improvements 8,141      
Total 8,424      
Accumulated depreciation and amortization 6,028      
Real Estate | SHOPPING CENTERS AND MALLS | Milford (ground and building leased through 2019), MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 0      
Total 0      
Accumulated depreciation and amortization 0      
Real Estate | SHOPPING CENTERS AND MALLS | Montclair, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 2,510      
Initial cost to company        
Land 66      
Building and improvements 419      
Costs capitalized subsequent to acquisition 419      
Gross amount at which carried at close of period        
Land 67      
Building and improvements 837      
Total 904      
Accumulated depreciation and amortization 704      
Real Estate | SHOPPING CENTERS AND MALLS | Montehiedra, Puerto Rico        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 116,984      
Initial cost to company        
Land 9,182      
Building and improvements 66,751      
Costs capitalized subsequent to acquisition 12,223      
Gross amount at which carried at close of period        
Land 9,267      
Building and improvements 78,889      
Total 88,156      
Accumulated depreciation and amortization 33,166      
Real Estate | SHOPPING CENTERS AND MALLS | Morris Plains, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 20,393      
Initial cost to company        
Land 1,104      
Building and improvements 6,411      
Costs capitalized subsequent to acquisition 1,723      
Gross amount at which carried at close of period        
Land 1,104      
Building and improvements 8,134      
Total 9,238      
Accumulated depreciation and amortization 7,081      
Real Estate | SHOPPING CENTERS AND MALLS | Mount Kisco, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 15,285      
Initial cost to company        
Land 22,700      
Building and improvements 26,700      
Costs capitalized subsequent to acquisition 790      
Gross amount at which carried at close of period        
Land 23,297      
Building and improvements 26,893      
Total 50,190      
Accumulated depreciation and amortization 5,396      
Real Estate | SHOPPING CENTERS AND MALLS | New Hyde Park (ground and building leased through 2029), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 4      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 4      
Total 4      
Accumulated depreciation and amortization 126      
Real Estate | SHOPPING CENTERS AND MALLS | Newington, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 10,719      
Initial cost to company        
Land 2,421      
Building and improvements 1,200      
Costs capitalized subsequent to acquisition 1,356      
Gross amount at which carried at close of period        
Land 2,421      
Building and improvements 2,556      
Total 4,977      
Accumulated depreciation and amortization 942      
Real Estate | SHOPPING CENTERS AND MALLS | Norfolk (ground and building leased through 2069), VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 3,927      
Costs capitalized subsequent to acquisition 15      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 3,942      
Total 3,942      
Accumulated depreciation and amortization 3,085      
Real Estate | SHOPPING CENTERS AND MALLS | North Bergen (Kennedy Boulevard), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 4,863      
Initial cost to company        
Land 2,308      
Building and improvements 636      
Costs capitalized subsequent to acquisition 13      
Gross amount at which carried at close of period        
Land 2,308      
Building and improvements 649      
Total 2,957      
Accumulated depreciation and amortization 471      
Real Estate | SHOPPING CENTERS AND MALLS | North Bergen (Tonnelle Avenue), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 75,000      
Initial cost to company        
Land 24,493      
Building and improvements 0      
Costs capitalized subsequent to acquisition 63,748      
Gross amount at which carried at close of period        
Land 31,806      
Building and improvements 56,435      
Total 88,241      
Accumulated depreciation and amortization 11,151      
Real Estate | SHOPPING CENTERS AND MALLS | North Plainfield, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 6,577      
Building and improvements 13,983      
Costs capitalized subsequent to acquisition (5,526)      
Gross amount at which carried at close of period        
Land 6,577      
Building and improvements 8,457      
Total 15,034      
Accumulated depreciation and amortization 2,749      
Real Estate | SHOPPING CENTERS AND MALLS | Oceanside, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 2,710      
Building and improvements 2,306      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 2,710      
Building and improvements 2,306      
Total 5,016      
Accumulated depreciation and amortization $ 495      
Real Estate | SHOPPING CENTERS AND MALLS | Paramus (ground leased through 2033), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 12,569      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 12,569      
Total 12,569      
Accumulated depreciation and amortization 2,469      
Real Estate | SHOPPING CENTERS AND MALLS | Rochester, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 4,183      
Initial cost to company        
Land 2,172      
Building and improvements 0      
Costs capitalized subsequent to acquisition 1      
Gross amount at which carried at close of period        
Land 2,173      
Building and improvements 0      
Total 2,173      
Accumulated depreciation and amortization $ 0      
Real Estate | SHOPPING CENTERS AND MALLS | Rochester (Henrietta) (ground leased through 2056), NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 2,647      
Costs capitalized subsequent to acquisition 1,228      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 3,875      
Total 3,875      
Accumulated depreciation and amortization $ 3,403      
Real Estate | SHOPPING CENTERS AND MALLS | Rockville, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 3,470      
Building and improvements 20,599      
Costs capitalized subsequent to acquisition 1,532      
Gross amount at which carried at close of period        
Land 3,470      
Building and improvements 22,132      
Total 25,602      
Accumulated depreciation and amortization $ 5,708      
Real Estate | SHOPPING CENTERS AND MALLS | Salem (ground leased through 2102), NH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 6,083      
Building and improvements 0      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 6,083      
Building and improvements 0      
Total 6,083      
Accumulated depreciation and amortization $ 0      
Real Estate | SHOPPING CENTERS AND MALLS | Signal Hill, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 9,652      
Building and improvements 2,940      
Costs capitalized subsequent to acquisition 1      
Gross amount at which carried at close of period        
Land 9,652      
Building and improvements 2,941      
Total 12,593      
Accumulated depreciation and amortization 680      
Real Estate | SHOPPING CENTERS AND MALLS | South Plainfield (ground leased through 2039), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 4,889      
Initial cost to company        
Land 0      
Building and improvements 10,044      
Costs capitalized subsequent to acquisition 1,532      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 11,576      
Total 11,576      
Accumulated depreciation and amortization 2,578      
Real Estate | SHOPPING CENTERS AND MALLS | Springfield, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 5,464      
Initial cost to company        
Land 2,797      
Building and improvements 2,471      
Costs capitalized subsequent to acquisition 728      
Gross amount at which carried at close of period        
Land 2,797      
Building and improvements 3,198      
Total 5,995      
Accumulated depreciation and amortization $ 1,216      
Real Estate | SHOPPING CENTERS AND MALLS | Springfield, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 80      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 80      
Total 80      
Accumulated depreciation and amortization $ 80      
Real Estate | SHOPPING CENTERS AND MALLS | Staten Island, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 11,446      
Building and improvements 21,262      
Costs capitalized subsequent to acquisition 2,855      
Gross amount at which carried at close of period        
Land 11,446      
Building and improvements 24,117      
Total 35,563      
Accumulated depreciation and amortization 6,839      
Real Estate | SHOPPING CENTERS AND MALLS | Totowa, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 23,635      
Initial cost to company        
Land 120      
Building and improvements 11,994      
Costs capitalized subsequent to acquisition 4,868      
Gross amount at which carried at close of period        
Land 92      
Building and improvements 16,890      
Total 16,982      
Accumulated depreciation and amortization $ 13,253      
Real Estate | SHOPPING CENTERS AND MALLS | Turnersville, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 900      
Building and improvements 1,342      
Costs capitalized subsequent to acquisition 1,144      
Gross amount at which carried at close of period        
Land 900      
Building and improvements 2,485      
Total 3,385      
Accumulated depreciation and amortization $ 2,211      
Real Estate | SHOPPING CENTERS AND MALLS | Tyson’s Corner (ground and building leased through 2035), VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 0      
Total 0      
Accumulated depreciation and amortization 0      
Real Estate | SHOPPING CENTERS AND MALLS | Union (2445 Springfield Avenue), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 27,190      
Initial cost to company        
Land 19,700      
Building and improvements 45,090      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 19,700      
Building and improvements 45,090      
Total 64,790      
Accumulated depreciation and amortization 9,675      
Real Estate | SHOPPING CENTERS AND MALLS | Union (Route 22 and Morris Avenue), NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 30,851      
Initial cost to company        
Land 3,025      
Building and improvements 7,470      
Costs capitalized subsequent to acquisition 3,634      
Gross amount at which carried at close of period        
Land 3,025      
Building and improvements 11,104      
Total 14,129      
Accumulated depreciation and amortization $ 5,624      
Real Estate | SHOPPING CENTERS AND MALLS | Vallejo (ground leased through 2043), CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 2,945      
Costs capitalized subsequent to acquisition 221      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 3,166      
Total 3,166      
Accumulated depreciation and amortization $ 759      
Real Estate | SHOPPING CENTERS AND MALLS | Walnut Creek (1149 South Main Street), CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 2,699      
Building and improvements 19,930      
Costs capitalized subsequent to acquisition 259      
Gross amount at which carried at close of period        
Land 2,699      
Building and improvements 20,189      
Total 22,888      
Accumulated depreciation and amortization $ 5,110      
Real Estate | SHOPPING CENTERS AND MALLS | Walnut Creek (Mt. Diablo), CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 5,909      
Building and improvements 0      
Costs capitalized subsequent to acquisition 1,480      
Gross amount at which carried at close of period        
Land 5,908      
Building and improvements 1,481      
Total 7,389      
Accumulated depreciation and amortization 187      
Real Estate | SHOPPING CENTERS AND MALLS | Watchung, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 14,380      
Initial cost to company        
Land 4,178      
Building and improvements 5,463      
Costs capitalized subsequent to acquisition 2,059      
Gross amount at which carried at close of period        
Land 4,441      
Building and improvements 7,259      
Total 11,700      
Accumulated depreciation and amortization 4,567      
Real Estate | SHOPPING CENTERS AND MALLS | Waterbury, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 13,334      
Initial cost to company        
Land 667      
Building and improvements 4,504      
Costs capitalized subsequent to acquisition 4,572      
Gross amount at which carried at close of period        
Land 667      
Building and improvements 9,076      
Total 9,743      
Accumulated depreciation and amortization $ 6,303      
Real Estate | SHOPPING CENTERS AND MALLS | West Babylon, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 6,720      
Building and improvements 13,786      
Costs capitalized subsequent to acquisition (844)      
Gross amount at which carried at close of period        
Land 6,720      
Building and improvements 12,942      
Total 19,662      
Accumulated depreciation and amortization $ 2,785      
Real Estate | SHOPPING CENTERS AND MALLS | Wheaton (ground leased through 2060), MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 5,367      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 5,367      
Total 5,367      
Accumulated depreciation and amortization $ 1,241      
Real Estate | SHOPPING CENTERS AND MALLS | Wilkes-Barre (461 - 499 Mundy Street), PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 6,053      
Building and improvements 26,646      
Costs capitalized subsequent to acquisition 996      
Gross amount at which carried at close of period        
Land 6,053      
Building and improvements 27,643      
Total 33,696      
Accumulated depreciation and amortization 5,705      
Real Estate | SHOPPING CENTERS AND MALLS | Woodbridge, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 19,713      
Initial cost to company        
Land 1,509      
Building and improvements 2,675      
Costs capitalized subsequent to acquisition 2,551      
Gross amount at which carried at close of period        
Land 1,539      
Building and improvements 5,196      
Total 6,735      
Accumulated depreciation and amortization $ 2,612      
Real Estate | SHOPPING CENTERS AND MALLS | Wyomissing (ground and building leased through 2065), PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances      
Initial cost to company        
Land $ 0      
Building and improvements 2,646      
Costs capitalized subsequent to acquisition 1,675      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 4,321      
Total 4,321      
Accumulated depreciation and amortization 3,085      
Real Estate | SHOPPING CENTERS AND MALLS | York, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 4,968      
Initial cost to company        
Land 409      
Building and improvements 2,568      
Costs capitalized subsequent to acquisition 1,362      
Gross amount at which carried at close of period        
Land 409      
Building and improvements 3,930      
Total 4,339      
Accumulated depreciation and amortization 3,646      
Real Estate | WAREHOUSES | East Hanover - Five Buildings, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 576      
Building and improvements 7,752      
Costs capitalized subsequent to acquisition 27,435      
Gross amount at which carried at close of period        
Land 691      
Building and improvements 35,072      
Total 35,763      
Accumulated depreciation and amortization 15,104      
Leasehold Improvements, Equipment and Other        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial cost to company        
Land 0      
Building and improvements 0      
Costs capitalized subsequent to acquisition 3,876      
Gross amount at which carried at close of period        
Land 0      
Building and improvements 3,876      
Total 3,876      
Accumulated depreciation and amortization $ 544