XML 123 R110.htm IDEA: XBRL DOCUMENT v3.22.0.1
Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 982,392    
Buildings & Improvements, Initial Cost 3,249,802    
Land, Total Cost 1,019,655    
Buildings & Improvements, Total Cost 4,219,226    
Total Cost 5,238,881 $ 4,989,388 $ 4,709,812
Accumulated Depreciation 1,571,569    
Total Cost, Net of Accumulated Depreciation 3,667,312    
Encumbrances 125,382    
The changes in Total Real Estate Assets for the three years ended December 31, are as follows:      
Balance at beginning of year 4,989,388 4,709,812 4,627,866
Acquisitions 215,998 242,593 80,771
Developments, improvements and expansions 84,130 59,126 109,830
Adjustments of property carrying values (Impairments) (7,270) (5,200) (3,370)
Disposals(A) (43,365) (16,943) (105,285)
Balance at end of year 5,238,881 4,989,388 4,709,812
The changes in Accumulated Depreciation and Amortization for the three years ended December 31, are as follows:      
Balance at beginning of year 1,427,057 1,289,148 1,172,357
Depreciation for year 164,200 154,906 147,372
Disposals (19,688) (16,997) (30,581)
Balance at end of year 1,571,569 $ 1,427,057 $ 1,289,148
Phoenix, AZ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost 18,701    
Buildings & Improvements, Initial Cost 18,929    
Land, Total Cost 18,701    
Buildings & Improvements, Total Cost 24,597    
Total Cost 43,298    
Accumulated Depreciation 12,002    
Total Cost, Net of Accumulated Depreciation 31,296    
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 24,414    
Land, Total Cost 15,352    
Buildings & Improvements, Total Cost 29,130    
Total Cost 44,482    
Accumulated Depreciation 18,887    
Total Cost, Net of Accumulated Depreciation 25,595    
Encumbrances $ 0    
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    
Land, Total Cost 18,399    
Buildings & Improvements, Total Cost 42,553    
Total Cost 60,952    
Accumulated Depreciation 15,039    
Total Cost, Net of Accumulated Depreciation 45,913    
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    
Land, Total Cost 27,269    
Buildings & Improvements, Total Cost 27,405    
Total Cost 54,674    
Accumulated Depreciation 6,300    
Total Cost, Net of Accumulated Depreciation 48,374    
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    
Land, Total Cost 23,861    
Buildings & Improvements, Total Cost 64,180    
Total Cost 88,041    
Accumulated Depreciation 16,120    
Total Cost, Net of Accumulated Depreciation 71,921    
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    
Land, Total Cost 0    
Buildings & Improvements, Total Cost 197,363    
Total Cost 197,363    
Accumulated Depreciation 104,791    
Total Cost, Net of Accumulated Depreciation 92,572    
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    
Land, Total Cost 4,361    
Buildings & Improvements, Total Cost 33,538    
Total Cost 37,899    
Accumulated Depreciation 9,612    
Total Cost, Net of Accumulated Depreciation 28,287    
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    
Land, Total Cost 23,574    
Buildings & Improvements, Total Cost 68,854    
Total Cost 92,428    
Accumulated Depreciation 17,165    
Total Cost, Net of Accumulated Depreciation 75,263    
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    
Land, Total Cost 10,464    
Buildings & Improvements, Total Cost 31,146    
Total Cost 41,610    
Accumulated Depreciation 14,730    
Total Cost, Net of Accumulated Depreciation 26,880    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2002    
Centennial, CO [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 7,833    
Buildings & Improvements, Initial Cost 35,550    
Land, Total Cost 9,075    
Buildings & Improvements, Total Cost 68,789    
Total Cost 77,864    
Accumulated Depreciation 47,401    
Total Cost, Net of Accumulated Depreciation 30,463    
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    
Land, Total Cost 9,001    
Buildings & Improvements, Total Cost 60,890    
Total Cost 69,891    
Accumulated Depreciation 18,778    
Total Cost, Net of Accumulated Depreciation 51,113    
Encumbrances $ 0    
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    
Land, Total Cost 20,804    
Buildings & Improvements, Total Cost 30,343    
Total Cost 51,147    
Accumulated Depreciation 17,811    
Total Cost, Net of Accumulated Depreciation 33,336    
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    
Land, Total Cost 4,632    
Buildings & Improvements, Total Cost 42,830    
Total Cost 47,462    
Accumulated Depreciation 10,940    
Total Cost, Net of Accumulated Depreciation 36,522    
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    
Land, Total Cost 6,457    
Buildings & Improvements, Total Cost 64,406    
Total Cost 70,863    
Accumulated Depreciation 12,122    
Total Cost, Net of Accumulated Depreciation 58,741    
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    
Land, Total Cost 6,090    
Buildings & Improvements, Total Cost 12,616    
Total Cost 18,706    
Accumulated Depreciation 6,085    
Total Cost, Net of Accumulated Depreciation 12,621    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Boynton Beach, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,048    
Buildings & Improvements, Initial Cost 9,256    
Land, Total Cost 6,048    
Buildings & Improvements, Total Cost 9,256    
Total Cost 15,304    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 15,304    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Brandon, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 0    
Buildings & Improvements, Initial Cost 4,111    
Land, Total Cost 0    
Buildings & Improvements, Total Cost 27,484    
Total Cost 27,484    
Accumulated Depreciation 3,836    
Total Cost, Net of Accumulated Depreciation 23,648    
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    
Land, Total Cost 4,775    
Buildings & Improvements, Total Cost 19,400    
Total Cost 24,175    
Accumulated Depreciation 8,571    
Total Cost, Net of Accumulated Depreciation 15,604    
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    
Land, Total Cost 2,938    
Buildings & Improvements, Total Cost 18,884    
Total Cost 21,822    
Accumulated Depreciation 4,313    
Total Cost, Net of Accumulated Depreciation 17,509    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Delray Beach, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 12,664    
Buildings & Improvements, Initial Cost 26,006    
Land, Total Cost 12,664    
Buildings & Improvements, Total Cost 26,006    
Total Cost 38,670    
Accumulated Depreciation 602    
Total Cost, Net of Accumulated Depreciation 38,068    
Encumbrances $ 17,578    
Date of Construction (C) Acquisition (A) 2021    
Fort Walton Beach, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,643    
Buildings & Improvements, Initial Cost 5,612    
Land, Total Cost 3,643    
Buildings & Improvements, Total Cost 5,612    
Total Cost 9,255    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 9,255    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Jupiter, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 8,764    
Buildings & Improvements, Initial Cost 20,051    
Land, Total Cost 8,764    
Buildings & Improvements, Total Cost 20,310    
Total Cost 29,074    
Accumulated Depreciation 903    
Total Cost, Net of Accumulated Depreciation 28,171    
Encumbrances $ 12,721    
Date of Construction (C) Acquisition (A) 2020    
Melbourne, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,111    
Buildings & Improvements, Initial Cost 7,325    
Land, Total Cost 3,111    
Buildings & Improvements, Total Cost 12,557    
Total Cost 15,668    
Accumulated Depreciation 1,235    
Total Cost, Net of Accumulated Depreciation 14,433    
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    
Land, Total Cost 26,743    
Buildings & Improvements, Total Cost 121,805    
Total Cost 148,548    
Accumulated Depreciation 55,003    
Total Cost, Net of Accumulated Depreciation 93,545    
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    
Land, Total Cost 10,172    
Buildings & Improvements, Total Cost 43,609    
Total Cost 53,781    
Accumulated Depreciation 11,461    
Total Cost, Net of Accumulated Depreciation 42,320    
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    
Land, Total Cost 13,057    
Buildings & Improvements, Total Cost 82,233    
Total Cost 95,290    
Accumulated Depreciation 14,166    
Total Cost, Net of Accumulated Depreciation 81,124    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2016    
Orlando, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 9,451    
Buildings & Improvements, Initial Cost 16,424    
Land, Total Cost 9,451    
Buildings & Improvements, Total Cost 16,480    
Total Cost 25,931    
Accumulated Depreciation 734    
Total Cost, Net of Accumulated Depreciation 25,197    
Encumbrances $ 20,018    
Date of Construction (C) Acquisition (A) 2020    
Palm Harbor, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,137    
Buildings & Improvements, Initial Cost 4,089    
Land, Total Cost 1,137    
Buildings & Improvements, Total Cost 5,342    
Total Cost 6,479    
Accumulated Depreciation 4,119    
Total Cost, Net of Accumulated Depreciation 2,360    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1995    
Plantation, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 21,729    
Buildings & Improvements, Initial Cost 37,331    
Land, Total Cost 22,112    
Buildings & Improvements, Total Cost 96,247    
Total Cost 118,359    
Accumulated Depreciation 50,138    
Total Cost, Net of Accumulated Depreciation 68,221    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Tamarac, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 16,730    
Buildings & Improvements, Initial Cost 22,139    
Land, Total Cost 16,730    
Buildings & Improvements, Total Cost 22,139    
Total Cost 38,869    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 38,869    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Tampa, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,000    
Buildings & Improvements, Initial Cost 10,907    
Land, Total Cost 10,000    
Buildings & Improvements, Total Cost 11,090    
Total Cost 21,090    
Accumulated Depreciation 868    
Total Cost, Net of Accumulated Depreciation 20,222    
Encumbrances $ 9,100    
Date of Construction (C) Acquisition (A) 2019    
Tampa, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,800    
Buildings & Improvements, Initial Cost 15,874    
Land, Total Cost 6,800    
Buildings & Improvements, Total Cost 15,874    
Total Cost 22,674    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 22,674    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Wesley Chapel, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 8,080    
Buildings & Improvements, Initial Cost 21,567    
Land, Total Cost 8,080    
Buildings & Improvements, Total Cost 21,567    
Total Cost 29,647    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 29,647    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Winter Garden, FL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 38,945    
Buildings & Improvements, Initial Cost 130,382    
Land, Total Cost 38,945    
Buildings & Improvements, Total Cost 139,688    
Total Cost 178,633    
Accumulated Depreciation 40,675    
Total Cost, Net of Accumulated Depreciation 137,958    
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    
Land, Total Cost 14,078    
Buildings & Improvements, Total Cost 48,077    
Total Cost 62,155    
Accumulated Depreciation 18,825    
Total Cost, Net of Accumulated Depreciation 43,330    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2009    
Atlanta, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 12,358    
Buildings & Improvements, Initial Cost 17,103    
Land, Total Cost 12,358    
Buildings & Improvements, Total Cost 17,103    
Total Cost 29,461    
Accumulated Depreciation 229    
Total Cost, Net of Accumulated Depreciation 29,232    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Cumming, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 14,249    
Buildings & Improvements, Initial Cost 23,653    
Land, Total Cost 14,249    
Buildings & Improvements, Total Cost 29,242    
Total Cost 43,491    
Accumulated Depreciation 16,567    
Total Cost, Net of Accumulated Depreciation 26,924    
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    
Land, Total Cost 6,851    
Buildings & Improvements, Total Cost 50,752    
Total Cost 57,603    
Accumulated Depreciation 14,922    
Total Cost, Net of Accumulated Depreciation 42,681    
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    
Land, Total Cost 3,391    
Buildings & Improvements, Total Cost 8,754    
Total Cost 12,145    
Accumulated Depreciation 1,113    
Total Cost, Net of Accumulated Depreciation 11,032    
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    
Land, Total Cost 2,839    
Buildings & Improvements, Total Cost 7,333    
Total Cost 10,172    
Accumulated Depreciation 1,118    
Total Cost, Net of Accumulated Depreciation 9,054    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2018    
Ellenwood, GA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,285    
Buildings & Improvements, Initial Cost 4,841    
Land, Total Cost 1,285    
Buildings & Improvements, Total Cost 4,841    
Total Cost 6,126    
Accumulated Depreciation 0    
Total Cost, Net of Accumulated Depreciation 6,126    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Roswell, GA      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,566    
Buildings & Improvements, Initial Cost 15,005    
Land, Total Cost 7,894    
Buildings & Improvements, Total Cost 29,180    
Total Cost 37,074    
Accumulated Depreciation 13,398    
Total Cost, Net of Accumulated Depreciation 23,676    
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    
Land, Total Cost 10,342    
Buildings & Improvements, Total Cost 61,386    
Total Cost 71,728    
Accumulated Depreciation 29,090    
Total Cost, Net of Accumulated Depreciation 42,638    
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    
Land, Total Cost 13,335    
Buildings & Improvements, Total Cost 34,873    
Total Cost 48,208    
Accumulated Depreciation 19,745    
Total Cost, Net of Accumulated Depreciation 28,463    
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    
Land, Total Cost 22,642    
Buildings & Improvements, Total Cost 83,275    
Total Cost 105,917    
Accumulated Depreciation 21,464    
Total Cost, Net of Accumulated Depreciation 84,453    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2014    
Chicago, IL [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 23,588    
Buildings & Improvements, Initial Cost 45,632    
Land, Total Cost 23,588    
Buildings & Improvements, Total Cost 45,954    
Total Cost 69,542    
Accumulated Depreciation 8,603    
Total Cost, Net of Accumulated Depreciation 60,939    
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    
Land, Total Cost 24,646    
Buildings & Improvements, Total Cost 92,209    
Total Cost 116,855    
Accumulated Depreciation 25,986    
Total Cost, Net of Accumulated Depreciation 90,869    
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    
Land, Total Cost 9,601    
Buildings & Improvements, Total Cost 50,350    
Total Cost 59,951    
Accumulated Depreciation 13,196    
Total Cost, Net of Accumulated Depreciation 46,755    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Everett, MA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 9,311    
Buildings & Improvements, Initial Cost 44,647    
Land, Total Cost 9,462    
Buildings & Improvements, Total Cost 60,446    
Total Cost 69,908    
Accumulated Depreciation 37,109    
Total Cost, Net of Accumulated Depreciation 32,799    
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    
Land, Total Cost 75,675    
Buildings & Improvements, Total Cost 204,956    
Total Cost 280,631    
Accumulated Depreciation 56,382    
Total Cost, Net of Accumulated Depreciation 224,249    
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    
Land, Total Cost 10,018    
Buildings & Improvements, Total Cost 41,035    
Total Cost 51,053    
Accumulated Depreciation 26,195    
Total Cost, Net of Accumulated Depreciation 24,858    
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    
Land, Total Cost 3,847    
Buildings & Improvements, Total Cost 29,551    
Total Cost 33,398    
Accumulated Depreciation 13,887    
Total Cost, Net of Accumulated Depreciation 19,511    
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    
Land, Total Cost 7,714    
Buildings & Improvements, Total Cost 38,453    
Total Cost 46,167    
Accumulated Depreciation 15,662    
Total Cost, Net of Accumulated Depreciation 30,505    
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    
Land, Total Cost 3,166    
Buildings & Improvements, Total Cost 3,766    
Total Cost 6,932    
Accumulated Depreciation 1,548    
Total Cost, Net of Accumulated Depreciation 5,384    
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    
Land, Total Cost 10,014    
Buildings & Improvements, Total Cost 92,699    
Total Cost 102,713    
Accumulated Depreciation 49,999    
Total Cost, Net of Accumulated Depreciation 52,714    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2003    
Princeton, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 17,991    
Buildings & Improvements, Initial Cost 82,063    
Land, Total Cost 18,998    
Buildings & Improvements, Total Cost 122,850    
Total Cost 141,848    
Accumulated Depreciation 72,156    
Total Cost, Net of Accumulated Depreciation 69,692    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1997    
Voorhees, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,350    
Buildings & Improvements, Initial Cost 1,837    
Land, Total Cost 1,350    
Buildings & Improvements, Total Cost 4,960    
Total Cost 6,310    
Accumulated Depreciation 135    
Total Cost, Net of Accumulated Depreciation 6,175    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2020    
West Long Branch, NJ [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 14,131    
Buildings & Improvements, Initial Cost 51,982    
Land, Total Cost 14,131    
Buildings & Improvements, Total Cost 82,553    
Total Cost 96,684    
Accumulated Depreciation 41,151    
Total Cost, Net of Accumulated Depreciation 55,533    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2004    
Hempstead, NY [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 26,487    
Buildings & Improvements, Initial Cost 14,418    
Land, Total Cost 26,479    
Buildings & Improvements, Total Cost 14,651    
Total Cost 41,130    
Accumulated Depreciation 731    
Total Cost, Net of Accumulated Depreciation 40,399    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2020    
Charlotte, NC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 27,707    
Buildings & Improvements, Initial Cost 45,021    
Land, Total Cost 27,707    
Buildings & Improvements, Total Cost 51,938    
Total Cost 79,645    
Accumulated Depreciation 18,839    
Total Cost, Net of Accumulated Depreciation 60,806    
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    
Land, Total Cost 11,224    
Buildings & Improvements, Total Cost 99,612    
Total Cost 110,836    
Accumulated Depreciation 30,551    
Total Cost, Net of Accumulated Depreciation 80,285    
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    
Land, Total Cost 8,463    
Buildings & Improvements, Total Cost 54,782    
Total Cost 63,245    
Accumulated Depreciation 12,822    
Total Cost, Net of Accumulated Depreciation 50,423    
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    
Land, Total Cost 4,382    
Buildings & Improvements, Total Cost 21,669    
Total Cost 26,051    
Accumulated Depreciation 11,391    
Total Cost, Net of Accumulated Depreciation 14,660    
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    
Land, Total Cost 19,572    
Buildings & Improvements, Total Cost 78,245    
Total Cost 97,817    
Accumulated Depreciation 19,365    
Total Cost, Net of Accumulated Depreciation 78,452    
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    
Land, Total Cost 14,078    
Buildings & Improvements, Total Cost 72,976    
Total Cost 87,054    
Accumulated Depreciation 49,461    
Total Cost, Net of Accumulated Depreciation 37,593    
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    
Land, Total Cost 20,666    
Buildings & Improvements, Total Cost 72,158    
Total Cost 92,824    
Accumulated Depreciation 24,132    
Total Cost, Net of Accumulated Depreciation 68,692    
Encumbrances $ 0    
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    
Land, Total Cost 3,609    
Buildings & Improvements, Total Cost 15,957    
Total Cost 19,566    
Accumulated Depreciation 11,380    
Total Cost, Net of Accumulated Depreciation 8,186    
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    
Land, Total Cost 2,032    
Buildings & Improvements, Total Cost 28,009    
Total Cost 30,041    
Accumulated Depreciation 7,282    
Total Cost, Net of Accumulated Depreciation 22,759    
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    
Land, Total Cost 993    
Buildings & Improvements, Total Cost 42,895    
Total Cost 43,888    
Accumulated Depreciation 26,089    
Total Cost, Net of Accumulated Depreciation 17,799    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 1969    
Westlake, OH [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 424    
Buildings & Improvements, Initial Cost 4,004    
Land, Total Cost 424    
Buildings & Improvements, Total Cost 30,357    
Total Cost 30,781    
Accumulated Depreciation 6,312    
Total Cost, Net of Accumulated Depreciation 24,469    
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    
Land, Total Cost 20,208    
Buildings & Improvements, Total Cost 65,338    
Total Cost 85,546    
Accumulated Depreciation 22,950    
Total Cost, Net of Accumulated Depreciation 62,596    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2012    
Portland, OR [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 10,122    
Buildings & Improvements, Initial Cost 37,457    
Land, Total Cost 10,122    
Buildings & Improvements, Total Cost 37,895    
Total Cost 48,017    
Accumulated Depreciation 2,950    
Total Cost, Net of Accumulated Depreciation 45,067    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2019    
Boothwyn, PA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 6,370    
Buildings & Improvements, Initial Cost 16,931    
Land, Total Cost 6,370    
Buildings & Improvements, Total Cost 17,013    
Total Cost 23,383    
Accumulated Depreciation 951    
Total Cost, Net of Accumulated Depreciation 22,432    
Encumbrances $ 15,979    
Date of Construction (C) Acquisition (A) 2020    
Downingtown, PA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 4,175    
Buildings & Improvements, Initial Cost 15,678    
Land, Total Cost 4,175    
Buildings & Improvements, Total Cost 15,925    
Total Cost 20,100    
Accumulated Depreciation 932    
Total Cost, Net of Accumulated Depreciation 19,168    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2020    
Easton, PA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 7,691    
Buildings & Improvements, Initial Cost 20,405    
Land, Total Cost 7,691    
Buildings & Improvements, Total Cost 20,772    
Total Cost 28,463    
Accumulated Depreciation 1,202    
Total Cost, Net of Accumulated Depreciation 27,261    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2020    
Anderson, SC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,372    
Buildings & Improvements, Initial Cost 11,656    
Land, Total Cost 1,372    
Buildings & Improvements, Total Cost 11,756    
Total Cost 13,128    
Accumulated Depreciation 466    
Total Cost, Net of Accumulated Depreciation 12,662    
Encumbrances $ 15,736    
Date of Construction (C) Acquisition (A) 2020    
Mount Pleasant, SC [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,430    
Buildings & Improvements, Initial Cost 10,470    
Land, Total Cost 2,341    
Buildings & Improvements, Total Cost 31,164    
Total Cost 33,505    
Accumulated Depreciation 17,421    
Total Cost, Net of Accumulated Depreciation 16,084    
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    
Land, Total Cost 6,101    
Buildings & Improvements, Total Cost 28,234    
Total Cost 34,335    
Accumulated Depreciation 8,227    
Total Cost, Net of Accumulated Depreciation 26,108    
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    
Land, Total Cost 5,545    
Buildings & Improvements, Total Cost 30,742    
Total Cost 36,287    
Accumulated Depreciation 10,010    
Total Cost, Net of Accumulated Depreciation 26,277    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2013    
Round Rock, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,467    
Buildings & Improvements, Initial Cost 8,839    
Land, Total Cost 3,467    
Buildings & Improvements, Total Cost 8,804    
Total Cost 12,271    
Accumulated Depreciation 722    
Total Cost, Net of Accumulated Depreciation 11,549    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2019    
San Antonio, TX [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 3,475    
Buildings & Improvements, Initial Cost 37,327    
Land, Total Cost 4,873    
Buildings & Improvements, Total Cost 53,641    
Total Cost 58,514    
Accumulated Depreciation 30,566    
Total Cost, Net of Accumulated Depreciation 27,948    
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    
Land, Total Cost 10,158    
Buildings & Improvements, Total Cost 115,143    
Total Cost 125,301    
Accumulated Depreciation 50,053    
Total Cost, Net of Accumulated Depreciation 75,248    
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    
Land, Total Cost 2,381    
Buildings & Improvements, Total Cost 24,567    
Total Cost 26,948    
Accumulated Depreciation 12,635    
Total Cost, Net of Accumulated Depreciation 14,313    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Charlottesville, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 2,181    
Buildings & Improvements, Initial Cost 6,571    
Land, Total Cost 2,181    
Buildings & Improvements, Total Cost 6,571    
Total Cost 8,752    
Accumulated Depreciation 133    
Total Cost, Net of Accumulated Depreciation 8,619    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Charlottesville, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 1,400    
Buildings & Improvements, Initial Cost 2,537    
Land, Total Cost 1,400    
Buildings & Improvements, Total Cost 2,537    
Total Cost 3,937    
Accumulated Depreciation 7    
Total Cost, Net of Accumulated Depreciation 3,930    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2021    
Fairfax, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,681    
Buildings & Improvements, Initial Cost 68,536    
Land, Total Cost 15,681    
Buildings & Improvements, Total Cost 71,587    
Total Cost 87,268    
Accumulated Depreciation 19,338    
Total Cost, Net of Accumulated Depreciation 67,930    
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    
Land, Total Cost 11,879    
Buildings & Improvements, Total Cost 37,302    
Total Cost 49,181    
Accumulated Depreciation 17,528    
Total Cost, Net of Accumulated Depreciation 31,653    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Richmond, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 7,331    
Buildings & Improvements, Initial Cost 49,278    
Land, Total Cost 7,330    
Buildings & Improvements, Total Cost 51,034    
Total Cost 58,364    
Accumulated Depreciation 1,908    
Total Cost, Net of Accumulated Depreciation 56,456    
Encumbrances $ 34,250    
Date of Construction (C) Acquisition (A) 2020    
Springfield, VA [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 17,016    
Buildings & Improvements, Initial Cost 40,038    
Land, Total Cost 17,016    
Buildings & Improvements, Total Cost 44,931    
Total Cost 61,947    
Accumulated Depreciation 20,790    
Total Cost, Net of Accumulated Depreciation 41,157    
Encumbrances $ 0    
Date of Construction (C) Acquisition (A) 2007    
Portfolio Balance (SITE) [Member]      
Real Estate And Accumulated Depreciation [Line Items]      
Land, Initial Cost $ 15,051    
Buildings & Improvements, Initial Cost 202,200    
Land, Total Cost 15,051    
Buildings & Improvements, Total Cost 202,200    
Total Cost 217,251    
Accumulated Depreciation 111,538    
Total Cost, Net of Accumulated Depreciation 105,713    
Encumbrances $ 0