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Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 852,743    
Buildings & Improvements, Initial Cost 2,973,513    
Improvements, Initial Cost 1,920    
Land, Total Cost 891,213    
Buildings & Improvements, Total Cost 3,736,653    
Total Cost 4,627,866 $ 8,248,003 $ 9,244,058
Accumulated Depreciation 1,172,357    
Total Cost, Net of Accumulated Depreciation 3,455,509    
Encumbrances 87,467    
The changes in Total Real Estate Assets for the three years ended December 31, are as follows:      
Balance at beginning of year 8,248,003 9,244,058 10,128,199
Acquisitions 34,675 82,137 130,512
Developments, improvements and expansions 120,325 119,651 148,521
Adjustments of property carrying values (Impairments) (56,317) (345,282) (109,912)
Disposals (998,776) (852,561) (1,053,262)
Spin-off of RVI (2,720,044) 0 0
Balance at end of year 4,627,866 8,248,003 9,244,058
The changes in Accumulated Depreciation and Amortization for the three years ended December 31, are as follows:      
Balance at beginning of year 1,953,479 1,996,176 2,062,899
Depreciation for year 207,902 285,484 317,402
Disposals (268,405) (328,181) (384,125)
Spin-off of RVI (720,619) 0 0
Balance at end of year 1,172,357 $ 1,953,479 $ 1,996,176
Phoenix, AZ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost 18,701    
Buildings & Improvements, Initial Cost 18,811    
Improvements, Initial Cost 118    
Land, Total Cost 18,701    
Buildings & Improvements, Total Cost 22,792    
Total Cost 41,493    
Accumulated Depreciation 9,055    
Total Cost, Net of Accumulated Depreciation 32,438    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1999    
Phoenix, AZ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,352    
Buildings & Improvements, Initial Cost 22,813    
Improvements, Initial Cost 1,601    
Land, Total Cost 15,352    
Buildings & Improvements, Total Cost 28,415    
Total Cost 43,767    
Accumulated Depreciation 16,620    
Total Cost, Net of Accumulated Depreciation 27,147    
Encumbrances $ 29,113    
Date of Construction (C) Acquisition (A) 2003    
Phoenix, AZ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,090    
Buildings & Improvements, Initial Cost 36,880    
Improvements, Initial Cost 0    
Land, Total Cost 18,399    
Buildings & Improvements, Total Cost 42,117    
Total Cost 60,516    
Accumulated Depreciation 10,576    
Total Cost, Net of Accumulated Depreciation 49,940    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2012    
Buena Park, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 27,269    
Buildings & Improvements, Initial Cost 21,427    
Improvements, Initial Cost 0    
Land, Total Cost 27,269    
Buildings & Improvements, Total Cost 23,417    
Total Cost 50,686    
Accumulated Depreciation 2,929    
Total Cost, Net of Accumulated Depreciation 47,757    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2015    
Fontana, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 23,861    
Buildings & Improvements, Initial Cost 57,931    
Improvements, Initial Cost 0    
Land, Total Cost 23,861    
Buildings & Improvements, Total Cost 62,016    
Total Cost 85,877    
Accumulated Depreciation 9,188    
Total Cost, Net of Accumulated Depreciation 76,689    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Long Beach, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 0    
Buildings & Improvements, Initial Cost 147,918    
Improvements, Initial Cost 0    
Land, Total Cost 0    
Buildings & Improvements, Total Cost 196,684    
Total Cost 196,684    
Accumulated Depreciation 78,576    
Total Cost, Net of Accumulated Depreciation 118,108    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2005    
Oakland, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,361    
Buildings & Improvements, Initial Cost 33,538    
Improvements, Initial Cost 0    
Land, Total Cost 4,361    
Buildings & Improvements, Total Cost 33,538    
Total Cost 37,899    
Accumulated Depreciation 6,349    
Total Cost, Net of Accumulated Depreciation 31,550    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Roseville, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 23,574    
Buildings & Improvements, Initial Cost 67,031    
Improvements, Initial Cost 0    
Land, Total Cost 23,574    
Buildings & Improvements, Total Cost 67,679    
Total Cost 91,253    
Accumulated Depreciation 10,516    
Total Cost, Net of Accumulated Depreciation 80,737    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
San Francisco, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,464    
Buildings & Improvements, Initial Cost 25,730    
Improvements, Initial Cost 0    
Land, Total Cost 10,464    
Buildings & Improvements, Total Cost 26,084    
Total Cost 36,548    
Accumulated Depreciation 12,091    
Total Cost, Net of Accumulated Depreciation 24,457    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2002    
Vista, CA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 12,677    
Buildings & Improvements, Initial Cost 47,145    
Improvements, Initial Cost 0    
Land, Total Cost 11,576    
Buildings & Improvements, Total Cost 45,709    
Total Cost 57,285    
Accumulated Depreciation 6,987    
Total Cost, Net of Accumulated Depreciation 50,298    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Centennial, CO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 7,833    
Buildings & Improvements, Initial Cost 35,550    
Improvements, Initial Cost 0    
Land, Total Cost 9,075    
Buildings & Improvements, Total Cost 67,479    
Total Cost 76,554    
Accumulated Depreciation 40,526    
Total Cost, Net of Accumulated Depreciation 36,028    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1997    
Colorado Springs, CO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 9,001    
Buildings & Improvements, Initial Cost 47,671    
Improvements, Initial Cost 0    
Land, Total Cost 9,001    
Buildings & Improvements, Total Cost 55,526    
Total Cost 64,527    
Accumulated Depreciation 11,790    
Total Cost, Net of Accumulated Depreciation 52,737    
Encumbrances $ 17,467    
Date of Construction (C) Acquisition (A) 2011    
Denver, CO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 20,733    
Buildings & Improvements, Initial Cost 22,818    
Improvements, Initial Cost 0    
Land, Total Cost 20,804    
Buildings & Improvements, Total Cost 29,326    
Total Cost 50,130    
Accumulated Depreciation 14,733    
Total Cost, Net of Accumulated Depreciation 35,397    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2003    
Parker, CO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,632    
Buildings & Improvements, Initial Cost 38,256    
Improvements, Initial Cost 0    
Land, Total Cost 4,632    
Buildings & Improvements, Total Cost 39,521    
Total Cost 44,153    
Accumulated Depreciation 6,836    
Total Cost, Net of Accumulated Depreciation 37,317    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Guilford, CT [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,588    
Buildings & Improvements, Initial Cost 41,892    
Improvements, Initial Cost 0    
Land, Total Cost 6,209    
Buildings & Improvements, Total Cost 60,768    
Total Cost 66,977    
Accumulated Depreciation 5,808    
Total Cost, Net of Accumulated Depreciation 61,169    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2015    
Windsor Court, CT [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,090    
Buildings & Improvements, Initial Cost 11,745    
Improvements, Initial Cost 0    
Land, Total Cost 6,090    
Buildings & Improvements, Total Cost 12,509    
Total Cost 18,599    
Accumulated Depreciation 4,756    
Total Cost, Net of Accumulated Depreciation 13,843    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Brandon, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 0    
Buildings & Improvements, Initial Cost 4,111    
Improvements, Initial Cost 0    
Land, Total Cost 0    
Buildings & Improvements, Total Cost 4,317    
Total Cost 4,317    
Accumulated Depreciation 2,348    
Total Cost, Net of Accumulated Depreciation 1,969    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1972    
Brandon, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,775    
Buildings & Improvements, Initial Cost 13,117    
Improvements, Initial Cost 0    
Land, Total Cost 4,775    
Buildings & Improvements, Total Cost 19,080    
Total Cost 23,855    
Accumulated Depreciation 5,805    
Total Cost, Net of Accumulated Depreciation 18,050    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2009    
Brandon, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,938    
Buildings & Improvements, Initial Cost 13,685    
Improvements, Initial Cost 0    
Land, Total Cost 2,938    
Buildings & Improvements, Total Cost 13,999    
Total Cost 16,937    
Accumulated Depreciation 2,723    
Total Cost, Net of Accumulated Depreciation 14,214    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Melbourne, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,111    
Buildings & Improvements, Initial Cost 7,325    
Improvements, Initial Cost 0    
Land, Total Cost 3,111    
Buildings & Improvements, Total Cost 7,325    
Total Cost 10,436    
Accumulated Depreciation 46    
Total Cost, Net of Accumulated Depreciation 10,390    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2018    
Miami, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 11,626    
Buildings & Improvements, Initial Cost 30,457    
Improvements, Initial Cost 0    
Land, Total Cost 26,743    
Buildings & Improvements, Total Cost 120,929    
Total Cost 147,672    
Accumulated Depreciation 42,509    
Total Cost, Net of Accumulated Depreciation 105,163    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2006    
Naples, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,172    
Buildings & Improvements, Initial Cost 39,342    
Improvements, Initial Cost 0    
Land, Total Cost 10,172    
Buildings & Improvements, Total Cost 39,449    
Total Cost 49,621    
Accumulated Depreciation 6,811    
Total Cost, Net of Accumulated Depreciation 42,810    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Orlando, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 8,528    
Buildings & Improvements, Initial Cost 56,684    
Improvements, Initial Cost 0    
Land, Total Cost 12,836    
Buildings & Improvements, Total Cost 79,529    
Total Cost 92,365    
Accumulated Depreciation 6,023    
Total Cost, Net of Accumulated Depreciation 86,342    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2016    
Palm Harbor, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,137    
Buildings & Improvements, Initial Cost 4,089    
Improvements, Initial Cost 0    
Land, Total Cost 1,137    
Buildings & Improvements, Total Cost 5,136    
Total Cost 6,273    
Accumulated Depreciation 3,738    
Total Cost, Net of Accumulated Depreciation 2,535    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1995    
Winter Garden, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 38,945    
Buildings & Improvements, Initial Cost 130,382    
Improvements, Initial Cost 0    
Land, Total Cost 38,945    
Buildings & Improvements, Total Cost 136,598    
Total Cost 175,543    
Accumulated Depreciation 26,115    
Total Cost, Net of Accumulated Depreciation 149,428    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Atlanta, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 14,078    
Buildings & Improvements, Initial Cost 41,050    
Improvements, Initial Cost 0    
Land, Total Cost 14,078    
Buildings & Improvements, Total Cost 47,486    
Total Cost 61,564    
Accumulated Depreciation 13,419    
Total Cost, Net of Accumulated Depreciation 48,145    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2009    
Cumming, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 14,249    
Buildings & Improvements, Initial Cost 23,653    
Improvements, Initial Cost 0    
Land, Total Cost 14,249    
Buildings & Improvements, Total Cost 26,114    
Total Cost 40,363    
Accumulated Depreciation 13,806    
Total Cost, Net of Accumulated Depreciation 26,557    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2003    
Cumming, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,851    
Buildings & Improvements, Initial Cost 49,659    
Improvements, Initial Cost 0    
Land, Total Cost 6,851    
Buildings & Improvements, Total Cost 50,106    
Total Cost 56,957    
Accumulated Depreciation 10,063    
Total Cost, Net of Accumulated Depreciation 46,894    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Cumming, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,391    
Buildings & Improvements, Initial Cost 8,218    
Improvements, Initial Cost 0    
Land, Total Cost 3,391    
Buildings & Improvements, Total Cost 8,218    
Total Cost 11,609    
Accumulated Depreciation 55    
Total Cost, Net of Accumulated Depreciation 11,554    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2018    
Douglasville, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,839    
Buildings & Improvements, Initial Cost 5,511    
Improvements, Initial Cost 0    
Land, Total Cost 2,839    
Buildings & Improvements, Total Cost 5,511    
Total Cost 8,350    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 8,350    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2018    
Roswell, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,566    
Buildings & Improvements, Initial Cost 15,005    
Improvements, Initial Cost 0    
Land, Total Cost 7,894    
Buildings & Improvements, Total Cost 26,455    
Total Cost 34,349    
Accumulated Depreciation 10,795    
Total Cost, Net of Accumulated Depreciation 23,554    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Snellville, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,185    
Buildings & Improvements, Initial Cost 51,815    
Improvements, Initial Cost 0    
Land, Total Cost 10,342    
Buildings & Improvements, Total Cost 58,284    
Total Cost 68,626    
Accumulated Depreciation 22,794    
Total Cost, Net of Accumulated Depreciation 45,832    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Suwanee, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 13,479    
Buildings & Improvements, Initial Cost 23,923    
Improvements, Initial Cost 0    
Land, Total Cost 13,335    
Buildings & Improvements, Total Cost 33,498    
Total Cost 46,833    
Accumulated Depreciation 17,064    
Total Cost, Net of Accumulated Depreciation 29,769    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2003    
Chicago, IL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 22,642    
Buildings & Improvements, Initial Cost 82,754    
Improvements, Initial Cost 0    
Land, Total Cost 22,642    
Buildings & Improvements, Total Cost 83,248    
Total Cost 105,890    
Accumulated Depreciation 12,729    
Total Cost, Net of Accumulated Depreciation 93,161    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Plantation, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 21,729    
Buildings & Improvements, Initial Cost 37,331    
Improvements, Initial Cost 0    
Land, Total Cost 22,112    
Buildings & Improvements, Total Cost 97,542    
Total Cost 119,654    
Accumulated Depreciation 41,022    
Total Cost, Net of Accumulated Depreciation 78,632    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Chicago, IL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 23,588    
Buildings & Improvements, Initial Cost 45,632    
Improvements, Initial Cost 0    
Land, Total Cost 23,588    
Buildings & Improvements, Total Cost 45,947    
Total Cost 69,535    
Accumulated Depreciation 3,390    
Total Cost, Net of Accumulated Depreciation 66,145    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2017    
Schaumburg, IL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 27,466    
Buildings & Improvements, Initial Cost 84,679    
Improvements, Initial Cost 0    
Land, Total Cost 27,466    
Buildings & Improvements, Total Cost 94,938    
Total Cost 122,404    
Accumulated Depreciation 17,075    
Total Cost, Net of Accumulated Depreciation 105,329    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Merriam, KS [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,043    
Buildings & Improvements, Initial Cost 55,028    
Improvements, Initial Cost 0    
Land, Total Cost 15,043    
Buildings & Improvements, Total Cost 55,953    
Total Cost 70,996    
Accumulated Depreciation 9,553    
Total Cost, Net of Accumulated Depreciation 61,443    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Bowie, MD [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 5,739    
Buildings & Improvements, Initial Cost 14,301    
Improvements, Initial Cost 0    
Land, Total Cost 738    
Buildings & Improvements, Total Cost 6,098    
Total Cost 6,836    
Accumulated Depreciation 4,884    
Total Cost, Net of Accumulated Depreciation 1,952    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Everett, MA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 9,311    
Buildings & Improvements, Initial Cost 44,647    
Improvements, Initial Cost 0    
Land, Total Cost 9,462    
Buildings & Improvements, Total Cost 58,465    
Total Cost 67,927    
Accumulated Depreciation 29,813    
Total Cost, Net of Accumulated Depreciation 38,114    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2001    
Framingham, MA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 75,675    
Buildings & Improvements, Initial Cost 191,594    
Improvements, Initial Cost 0    
Land, Total Cost 75,675    
Buildings & Improvements, Total Cost 197,740    
Total Cost 273,415    
Accumulated Depreciation 35,404    
Total Cost, Net of Accumulated Depreciation 238,011    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Brentwood, MO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,018    
Buildings & Improvements, Initial Cost 32,053    
Improvements, Initial Cost 0    
Land, Total Cost 10,018    
Buildings & Improvements, Total Cost 36,922    
Total Cost 46,940    
Accumulated Depreciation 21,445    
Total Cost, Net of Accumulated Depreciation 25,495    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1998    
East Hanover, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,847    
Buildings & Improvements, Initial Cost 23,798    
Improvements, Initial Cost 0    
Land, Total Cost 3,847    
Buildings & Improvements, Total Cost 28,852    
Total Cost 32,699    
Accumulated Depreciation 9,891    
Total Cost, Net of Accumulated Depreciation 22,808    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Edgewater, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 7,714    
Buildings & Improvements, Initial Cost 30,473    
Improvements, Initial Cost 0    
Land, Total Cost 7,714    
Buildings & Improvements, Total Cost 32,868    
Total Cost 40,582    
Accumulated Depreciation 11,837    
Total Cost, Net of Accumulated Depreciation 28,745    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Freehold, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,460    
Buildings & Improvements, Initial Cost 2,475    
Improvements, Initial Cost 0    
Land, Total Cost 3,166    
Buildings & Improvements, Total Cost 3,675    
Total Cost 6,841    
Accumulated Depreciation 1,142    
Total Cost, Net of Accumulated Depreciation 5,699    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2005    
Hamilton, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 8,039    
Buildings & Improvements, Initial Cost 49,896    
Improvements, Initial Cost 0    
Land, Total Cost 11,774    
Buildings & Improvements, Total Cost 89,822    
Total Cost 101,596    
Accumulated Depreciation 40,687    
Total Cost, Net of Accumulated Depreciation 60,909    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2003    
Princeton, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 13,448    
Buildings & Improvements, Initial Cost 74,249    
Improvements, Initial Cost 0    
Land, Total Cost 14,455    
Buildings & Improvements, Total Cost 100,192    
Total Cost 114,647    
Accumulated Depreciation 58,913    
Total Cost, Net of Accumulated Depreciation 55,734    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1997    
West Long Branch, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 14,131    
Buildings & Improvements, Initial Cost 51,982    
Improvements, Initial Cost 0    
Land, Total Cost 14,131    
Buildings & Improvements, Total Cost 79,741    
Total Cost 93,872    
Accumulated Depreciation 29,688    
Total Cost, Net of Accumulated Depreciation 64,184    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2004    
Charlotte, NC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 27,707    
Buildings & Improvements, Initial Cost 45,021    
Improvements, Initial Cost 0    
Land, Total Cost 27,707    
Buildings & Improvements, Total Cost 50,687    
Total Cost 78,394    
Accumulated Depreciation 13,773    
Total Cost, Net of Accumulated Depreciation 64,621    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2011    
Charlotte, NC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 11,224    
Buildings & Improvements, Initial Cost 82,124    
Improvements, Initial Cost 0    
Land, Total Cost 11,224    
Buildings & Improvements, Total Cost 86,551    
Total Cost 97,775    
Accumulated Depreciation 19,766    
Total Cost, Net of Accumulated Depreciation 78,009    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2012    
Charlotte, NC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,600    
Buildings & Improvements, Initial Cost 30,392    
Improvements, Initial Cost 0    
Land, Total Cost 7,922    
Buildings & Improvements, Total Cost 51,036    
Total Cost 58,958    
Accumulated Depreciation 7,406    
Total Cost, Net of Accumulated Depreciation 51,552    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Cornelius, NC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,382    
Buildings & Improvements, Initial Cost 15,184    
Improvements, Initial Cost 0    
Land, Total Cost 4,382    
Buildings & Improvements, Total Cost 21,036    
Total Cost 25,418    
Accumulated Depreciation 9,342    
Total Cost, Net of Accumulated Depreciation 16,076    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Cincinnati, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 19,572    
Buildings & Improvements, Initial Cost 54,495    
Improvements, Initial Cost 0    
Land, Total Cost 19,572    
Buildings & Improvements, Total Cost 74,206    
Total Cost 93,778    
Accumulated Depreciation 9,588    
Total Cost, Net of Accumulated Depreciation 84,190    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Columbus, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 12,922    
Buildings & Improvements, Initial Cost 46,006    
Improvements, Initial Cost 0    
Land, Total Cost 14,078    
Buildings & Improvements, Total Cost 69,984    
Total Cost 84,062    
Accumulated Depreciation 38,971    
Total Cost, Net of Accumulated Depreciation 45,091    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1998    
Columbus, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 18,716    
Buildings & Improvements, Initial Cost 64,617    
Improvements, Initial Cost 0    
Land, Total Cost 20,666    
Buildings & Improvements, Total Cost 71,645    
Total Cost 92,311    
Accumulated Depreciation 16,982    
Total Cost, Net of Accumulated Depreciation 75,329    
Encumbrances $ 40,887    
Date of Construction (C) Acquisition (A) 2011    
Dublin, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,609    
Buildings & Improvements, Initial Cost 11,546    
Improvements, Initial Cost 0    
Land, Total Cost 3,609    
Buildings & Improvements, Total Cost 15,118    
Total Cost 18,727    
Accumulated Depreciation 9,511    
Total Cost, Net of Accumulated Depreciation 9,216    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1998    
Mason, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,032    
Buildings & Improvements, Initial Cost 23,788    
Improvements, Initial Cost 0    
Land, Total Cost 2,032    
Buildings & Improvements, Total Cost 26,786    
Total Cost 28,818    
Accumulated Depreciation 4,090    
Total Cost, Net of Accumulated Depreciation 24,728    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Stow, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 993    
Buildings & Improvements, Initial Cost 9,028    
Improvements, Initial Cost 0    
Land, Total Cost 993    
Buildings & Improvements, Total Cost 38,184    
Total Cost 39,177    
Accumulated Depreciation 22,068    
Total Cost, Net of Accumulated Depreciation 17,109    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1969    
Toledo, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,316    
Buildings & Improvements, Initial Cost 3,961    
Improvements, Initial Cost 0    
Land, Total Cost 534    
Buildings & Improvements, Total Cost 2,366    
Total Cost 2,900    
Accumulated Depreciation 1,519    
Total Cost, Net of Accumulated Depreciation 1,381    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2004    
Westlake, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 424    
Buildings & Improvements, Initial Cost 3,803    
Improvements, Initial Cost 201    
Land, Total Cost 424    
Buildings & Improvements, Total Cost 20,096    
Total Cost 20,520    
Accumulated Depreciation 3,435    
Total Cost, Net of Accumulated Depreciation 17,085    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1974    
Portland, OR [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 20,208    
Buildings & Improvements, Initial Cost 50,738    
Improvements, Initial Cost 0    
Land, Total Cost 20,208    
Buildings & Improvements, Total Cost 59,341    
Total Cost 79,549    
Accumulated Depreciation 12,811    
Total Cost, Net of Accumulated Depreciation 66,738    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2012    
Mount Pleasant, SC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,430    
Buildings & Improvements, Initial Cost 10,470    
Improvements, Initial Cost 0    
Land, Total Cost 2,341    
Buildings & Improvements, Total Cost 23,188    
Total Cost 25,529    
Accumulated Depreciation 15,127    
Total Cost, Net of Accumulated Depreciation 10,402    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1995    
Brentwood, TN [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,101    
Buildings & Improvements, Initial Cost 25,956    
Improvements, Initial Cost 0    
Land, Total Cost 6,101    
Buildings & Improvements, Total Cost 27,746    
Total Cost 33,847    
Accumulated Depreciation 5,116    
Total Cost, Net of Accumulated Depreciation 28,731    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Highland Village, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 5,545    
Buildings & Improvements, Initial Cost 28,365    
Improvements, Initial Cost 0    
Land, Total Cost 5,545    
Buildings & Improvements, Total Cost 30,573    
Total Cost 36,118    
Accumulated Depreciation 6,658    
Total Cost, Net of Accumulated Depreciation 29,460    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
San Antonio, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,475    
Buildings & Improvements, Initial Cost 37,327    
Improvements, Initial Cost 0    
Land, Total Cost 4,873    
Buildings & Improvements, Total Cost 52,223    
Total Cost 57,096    
Accumulated Depreciation 24,717    
Total Cost, Net of Accumulated Depreciation 32,379    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2002    
San Antonio, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 5,602    
Buildings & Improvements, Initial Cost 39,196    
Improvements, Initial Cost 0    
Land, Total Cost 10,158    
Buildings & Improvements, Total Cost 115,032    
Total Cost 125,190    
Accumulated Depreciation 38,701    
Total Cost, Net of Accumulated Depreciation 86,489    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
San Antonio, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,381    
Buildings & Improvements, Initial Cost 6,487    
Improvements, Initial Cost 0    
Land, Total Cost 2,381    
Buildings & Improvements, Total Cost 23,283    
Total Cost 25,664    
Accumulated Depreciation 9,647    
Total Cost, Net of Accumulated Depreciation 16,017    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Fairfax, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,681    
Buildings & Improvements, Initial Cost 68,536    
Improvements, Initial Cost 0    
Land, Total Cost 15,681    
Buildings & Improvements, Total Cost 69,708    
Total Cost 85,389    
Accumulated Depreciation 12,131    
Total Cost, Net of Accumulated Depreciation 73,258    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Richmond, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 11,879    
Buildings & Improvements, Initial Cost 34,736    
Improvements, Initial Cost 0    
Land, Total Cost 11,879    
Buildings & Improvements, Total Cost 36,672    
Total Cost 48,551    
Accumulated Depreciation 14,095    
Total Cost, Net of Accumulated Depreciation 34,456    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Springfield, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 17,016    
Buildings & Improvements, Initial Cost 40,038    
Improvements, Initial Cost 0    
Land, Total Cost 17,016    
Buildings & Improvements, Total Cost 42,786    
Total Cost 59,802    
Accumulated Depreciation 15,877    
Total Cost, Net of Accumulated Depreciation 43,925    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Vancouver, WA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,169    
Buildings & Improvements, Initial Cost 25,769    
Improvements, Initial Cost 0    
Land, Total Cost 3,239    
Buildings & Improvements, Total Cost 20,933    
Total Cost 24,172    
Accumulated Depreciation 3,775    
Total Cost, Net of Accumulated Depreciation 20,397    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Portfolio Balance (SITE Centers) - unencumbered [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 33,813    
Buildings & Improvements, Initial Cost 198,276    
Improvements, Initial Cost 0    
Land, Total Cost 33,813    
Buildings & Improvements, Total Cost 198,276    
Total Cost 232,089    
Accumulated Depreciation 98,328    
Total Cost, Net of Accumulated Depreciation 133,761    
Encumbrances 0    
Portfolio Balance (SITE Centers) - encumbered [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost 0    
Buildings & Improvements, Initial Cost 1,580    
Improvements, Initial Cost 0    
Land, Total Cost 0    
Buildings & Improvements, Total Cost 1,580    
Total Cost 1,580    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 1,580    
Encumbrances $ 0