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Schedule III - Real Estate and Accumulated Depreciation - Triple-net (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances $ 2,222,445      
Initial cost of land and land improvements 4,157,359      
Initial cost of building and improvements 34,084,618      
Cost Capitalized Subsequent to Acquisition 8,207,202      
Carrying amount of land and land improvements 4,697,824      
Carrying amount of building and improvements 41,640,347      
Accumulated depreciation 9,274,814 $ 8,075,733 $ 6,910,114 $ 6,104,297
Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 38,261      
Initial cost of land and land improvements 970,310      
Initial cost of building and improvements 7,578,624      
Cost Capitalized Subsequent to Acquisition 645,258      
Carrying amount of land and land improvements 1,016,599      
Carrying amount of building and improvements 8,177,593      
Accumulated depreciation 1,694,904      
Abilene, TX 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 950      
Initial cost of building and improvements 20,987      
Cost Capitalized Subsequent to Acquisition 11,833      
Carrying amount of land and land improvements 950      
Carrying amount of building and improvements 32,820      
Accumulated depreciation 6,884      
Abilene, TX 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 990      
Initial cost of building and improvements 8,187      
Cost Capitalized Subsequent to Acquisition 1,232      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 9,419      
Accumulated depreciation 2,318      
Agawam, MA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 880      
Initial cost of building and improvements 13,942      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 880      
Carrying amount of building and improvements 13,942      
Accumulated depreciation 9,534      
Akron, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 633      
Initial cost of building and improvements 3,002      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 633      
Carrying amount of building and improvements 3,002      
Accumulated depreciation 460      
Akron, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 6,206      
Carrying amount of land and land improvements 991      
Carrying amount of building and improvements 5,215      
Accumulated depreciation 40      
Alexandria, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,452      
Initial cost of building and improvements 6,826      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,452      
Carrying amount of building and improvements 6,826      
Accumulated depreciation 1,011      
Alhambra, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 600      
Initial cost of building and improvements 6,305      
Cost Capitalized Subsequent to Acquisition 8,971      
Carrying amount of land and land improvements 600      
Carrying amount of building and improvements 15,276      
Accumulated depreciation 4,031      
Allen Park, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,767      
Initial cost of building and improvements 5,025      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,767      
Carrying amount of building and improvements 5,025      
Accumulated depreciation 753      
Allentown, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 494      
Initial cost of building and improvements 11,845      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 494      
Carrying amount of building and improvements 11,845      
Accumulated depreciation 1,731      
Allentown, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,491      
Initial cost of building and improvements 4,822      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,491      
Carrying amount of building and improvements 4,822      
Accumulated depreciation 740      
Alma, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,267      
Initial cost of building and improvements 6,543      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,267      
Carrying amount of building and improvements 6,543      
Accumulated depreciation 888      
Amarillo, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,273      
Initial cost of building and improvements 11,705      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,273      
Carrying amount of building and improvements 11,705      
Accumulated depreciation 1,488      
Ann Arbor, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,172      
Initial cost of building and improvements 11,123      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,172      
Carrying amount of building and improvements 11,123      
Accumulated depreciation 1,755      
Annandale, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,687      
Initial cost of building and improvements 18,974      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,687      
Carrying amount of building and improvements 18,974      
Accumulated depreciation 2,713      
Arlington, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,016      
Initial cost of building and improvements 8,801      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,016      
Carrying amount of building and improvements 8,801      
Accumulated depreciation 1,284      
Asheboro, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 5,032      
Cost Capitalized Subsequent to Acquisition 454      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 5,486      
Accumulated depreciation 2,777      
Asheville, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 204      
Initial cost of building and improvements 3,489      
Cost Capitalized Subsequent to Acquisition 30      
Carrying amount of land and land improvements 204      
Carrying amount of building and improvements 3,519      
Accumulated depreciation 2,260      
Asheville, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 280      
Initial cost of building and improvements 1,955      
Cost Capitalized Subsequent to Acquisition 796      
Carrying amount of land and land improvements 280      
Carrying amount of building and improvements 2,751      
Accumulated depreciation 1,324      
Atchison, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 140      
Initial cost of building and improvements 5,610      
Cost Capitalized Subsequent to Acquisition 24      
Carrying amount of land and land improvements 140      
Carrying amount of building and improvements 5,634      
Accumulated depreciation 1,272      
Austin, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,691      
Initial cost of building and improvements 5,005      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,691      
Carrying amount of building and improvements 5,005      
Accumulated depreciation 974      
Avon, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 900      
Initial cost of building and improvements 19,444      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 900      
Carrying amount of building and improvements 19,444      
Accumulated depreciation 5,154      
Avon, CT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,132      
Initial cost of building and improvements 7,624      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,132      
Carrying amount of building and improvements 7,624      
Accumulated depreciation 1,362      
Azusa, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 570      
Initial cost of building and improvements 3,141      
Cost Capitalized Subsequent to Acquisition 7,933      
Carrying amount of land and land improvements 570      
Carrying amount of building and improvements 11,074      
Accumulated depreciation 4,918      
Bad Axe, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,317      
Initial cost of building and improvements 5,972      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,317      
Carrying amount of building and improvements 5,972      
Accumulated depreciation 908      
Baldwin City, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 190      
Initial cost of building and improvements 4,810      
Cost Capitalized Subsequent to Acquisition 58      
Carrying amount of land and land improvements 190      
Carrying amount of building and improvements 4,868      
Accumulated depreciation 1,129      
Ballymena, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 487      
Initial cost of building and improvements 8,503      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 487      
Carrying amount of building and improvements 8,503      
Accumulated depreciation 256      
Ballymena, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 550      
Initial cost of building and improvements 5,465      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 550      
Carrying amount of building and improvements 5,465      
Accumulated depreciation 185      
Baltimore, MD 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,306      
Initial cost of building and improvements 4,303      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,306      
Carrying amount of building and improvements 4,303      
Accumulated depreciation 687      
Baltimore, MD 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,069      
Initial cost of building and improvements 3,148      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,069      
Carrying amount of building and improvements 3,148      
Accumulated depreciation 535      
Banbridge, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,053      
Initial cost of building and improvements 7,110      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,053      
Carrying amount of building and improvements 7,110      
Accumulated depreciation 271      
Barberton, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,307      
Initial cost of building and improvements 9,310      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,307      
Carrying amount of building and improvements 9,310      
Accumulated depreciation 1,350      
Bartlesville, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 100      
Initial cost of building and improvements 1,380      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 100      
Carrying amount of building and improvements 1,380      
Accumulated depreciation 989      
Bay City, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 633      
Initial cost of building and improvements 2,619      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 633      
Carrying amount of building and improvements 2,619      
Accumulated depreciation 434      
Bedford, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 637      
Initial cost of building and improvements 4,432      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 637      
Carrying amount of building and improvements 4,432      
Accumulated depreciation 761      
Belfast, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,066      
Initial cost of building and improvements 6,401      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,066      
Carrying amount of building and improvements 6,401      
Accumulated depreciation 254      
Belfast, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 145      
Initial cost of building and improvements 6,561      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 145      
Carrying amount of building and improvements 6,561      
Accumulated depreciation 177      
Belfast, UK 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 816      
Initial cost of building and improvements 4,957      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 816      
Carrying amount of building and improvements 4,957      
Accumulated depreciation 196      
Belfast, UK 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 777      
Initial cost of building and improvements 20,072      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 777      
Carrying amount of building and improvements 20,072      
Accumulated depreciation 571      
Belmont, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,000      
Initial cost of building and improvements 23,526      
Cost Capitalized Subsequent to Acquisition 2,138      
Carrying amount of land and land improvements 3,000      
Carrying amount of building and improvements 25,664      
Accumulated depreciation 10,098      
Belvidere, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,001      
Initial cost of building and improvements 26,191      
Cost Capitalized Subsequent to Acquisition 117      
Carrying amount of land and land improvements 2,001      
Carrying amount of building and improvements 26,308      
Accumulated depreciation 4,160      
Benbrook, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,550      
Initial cost of building and improvements 13,553      
Cost Capitalized Subsequent to Acquisition 2,825      
Carrying amount of land and land improvements 1,550      
Carrying amount of building and improvements 16,378      
Accumulated depreciation 4,936      
Berkeley, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 10,853      
Initial cost of land and land improvements 3,050      
Initial cost of building and improvements 32,677      
Cost Capitalized Subsequent to Acquisition 5,172      
Carrying amount of land and land improvements 3,050      
Carrying amount of building and improvements 37,849      
Accumulated depreciation 10,428      
Bethel Park, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,700      
Initial cost of building and improvements 16,007      
Cost Capitalized Subsequent to Acquisition 19      
Carrying amount of land and land improvements 1,700      
Carrying amount of building and improvements 16,026      
Accumulated depreciation 6,316      
Bethel Park, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,008      
Initial cost of building and improvements 6,740      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,008      
Carrying amount of building and improvements 6,740      
Accumulated depreciation 1,047      
Bethesda, MD | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,218      
Initial cost of building and improvements 6,869      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,218      
Carrying amount of building and improvements 6,869      
Accumulated depreciation 983      
Bethlehem, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,191      
Initial cost of building and improvements 16,887      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,191      
Carrying amount of building and improvements 16,887      
Accumulated depreciation 2,350      
Bethlehem, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,143      
Initial cost of building and improvements 13,588      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,143      
Carrying amount of building and improvements 13,588      
Accumulated depreciation 1,902      
Beverly Hills, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 6,000      
Initial cost of building and improvements 13,385      
Cost Capitalized Subsequent to Acquisition 203      
Carrying amount of land and land improvements 6,000      
Carrying amount of building and improvements 13,588      
Accumulated depreciation 3,151      
Bexleyheath, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,750      
Initial cost of building and improvements 10,807      
Cost Capitalized Subsequent to Acquisition 480      
Carrying amount of land and land improvements 3,874      
Carrying amount of building and improvements 11,163      
Accumulated depreciation 2,691      
Bingham Farms, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 781      
Initial cost of building and improvements 15,671      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 781      
Carrying amount of building and improvements 15,671      
Accumulated depreciation 2,261      
Birmingham, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 21,364      
Carrying amount of land and land improvements 1,644      
Carrying amount of building and improvements 19,720      
Accumulated depreciation 4,402      
Birmingham, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 11,640      
Carrying amount of land and land improvements 1,223      
Carrying amount of building and improvements 10,417      
Accumulated depreciation 2,343      
Birmingham, UK 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 17,043      
Carrying amount of land and land improvements 1,701      
Carrying amount of building and improvements 15,342      
Accumulated depreciation 3,475      
Birmingham, UK 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 10,864      
Carrying amount of land and land improvements 1,510      
Carrying amount of building and improvements 9,354      
Accumulated depreciation 2,151      
Blaine, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 11,764      
Carrying amount of land and land improvements 1,780      
Carrying amount of building and improvements 9,984      
Accumulated depreciation 59      
Bloomington, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 670      
Initial cost of building and improvements 17,423      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 17,423      
Accumulated depreciation 4,130      
Boca Raton, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,200      
Initial cost of building and improvements 4,974      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,200      
Carrying amount of building and improvements 4,974      
Accumulated depreciation 935      
Boca Raton, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,826      
Initial cost of building and improvements 4,061      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,826      
Carrying amount of building and improvements 4,061      
Accumulated depreciation 683      
Boulder, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,601      
Initial cost of building and improvements 21,364      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,601      
Carrying amount of building and improvements 21,364      
Accumulated depreciation 3,298      
Bournemouth, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,488      
Initial cost of building and improvements 17,248      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,488      
Carrying amount of building and improvements 17,248      
Accumulated depreciation 2,259      
Boynton Beach, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,138      
Initial cost of building and improvements 10,201      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,138      
Carrying amount of building and improvements 10,201      
Accumulated depreciation 1,611      
Boynton Beach, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,804      
Initial cost of building and improvements 14,222      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,804      
Carrying amount of building and improvements 14,222      
Accumulated depreciation 2,051      
Bracknell, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,078      
Initial cost of building and improvements 11,065      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,078      
Carrying amount of building and improvements 11,065      
Accumulated depreciation 1,859      
Bradenton, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 252      
Initial cost of building and improvements 3,298      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 252      
Carrying amount of building and improvements 3,298      
Accumulated depreciation 2,375      
Bradenton, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,562      
Initial cost of building and improvements 19,717      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,562      
Carrying amount of building and improvements 19,717      
Accumulated depreciation 126      
Bradenton, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,551      
Initial cost of building and improvements 13,517      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,551      
Carrying amount of building and improvements 13,517      
Accumulated depreciation 86      
Bradenton, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 507      
Initial cost of building and improvements 4,424      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 507      
Carrying amount of building and improvements 4,424      
Accumulated depreciation 28      
Braintree, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 13,296      
Cost Capitalized Subsequent to Acquisition 438      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 13,734      
Accumulated depreciation 3,380      
Brandon, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,378      
Initial cost of building and improvements 17,414      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,378      
Carrying amount of building and improvements 17,414      
Accumulated depreciation 112      
Brandon, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,186      
Initial cost of building and improvements 16,256      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,186      
Carrying amount of building and improvements 16,256      
Accumulated depreciation 103      
Brecksville, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 990      
Initial cost of building and improvements 19,353      
Cost Capitalized Subsequent to Acquisition 614      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 19,967      
Accumulated depreciation 5,021      
Brick, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,290      
Initial cost of building and improvements 25,247      
Cost Capitalized Subsequent to Acquisition 1,464      
Carrying amount of land and land improvements 1,290      
Carrying amount of building and improvements 26,711      
Accumulated depreciation 8,944      
Bridgewater, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,800      
Initial cost of building and improvements 31,810      
Cost Capitalized Subsequent to Acquisition 1,849      
Carrying amount of land and land improvements 1,800      
Carrying amount of building and improvements 33,659      
Accumulated depreciation 11,260      
Bristol, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 21,337      
Carrying amount of land and land improvements 4,087      
Carrying amount of building and improvements 17,250      
Accumulated depreciation 4,169      
Bristol, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 14,694      
Carrying amount of land and land improvements 2,180      
Carrying amount of building and improvements 12,514      
Accumulated depreciation 1,862      
Brooks, AB | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 376      
Initial cost of building and improvements 4,951      
Cost Capitalized Subsequent to Acquisition 267      
Carrying amount of land and land improvements 394      
Carrying amount of building and improvements 5,200      
Accumulated depreciation 1,299      
Brooksville, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,281      
Initial cost of building and improvements 18,506      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,281      
Carrying amount of building and improvements 18,506      
Accumulated depreciation 116      
Brooksville, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,943      
Initial cost of building and improvements 14,550      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,943      
Carrying amount of building and improvements 14,550      
Accumulated depreciation 92      
Bucyrus, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,119      
Initial cost of building and improvements 2,611      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,119      
Carrying amount of building and improvements 2,611      
Accumulated depreciation 463      
Burleson, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 670      
Initial cost of building and improvements 13,985      
Cost Capitalized Subsequent to Acquisition 2,843      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 16,828      
Accumulated depreciation 5,301      
Burlington, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 280      
Initial cost of building and improvements 4,297      
Cost Capitalized Subsequent to Acquisition 849      
Carrying amount of land and land improvements 280      
Carrying amount of building and improvements 5,146      
Accumulated depreciation 2,646      
Burlington, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 460      
Initial cost of building and improvements 5,467      
Cost Capitalized Subsequent to Acquisition 110      
Carrying amount of land and land improvements 460      
Carrying amount of building and improvements 5,577      
Accumulated depreciation 2,926      
Burnaby, BC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 7,623      
Initial cost of building and improvements 13,844      
Cost Capitalized Subsequent to Acquisition 1,047      
Carrying amount of land and land improvements 7,991      
Carrying amount of building and improvements 14,523      
Accumulated depreciation 3,661      
Calgary, AB 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,341      
Initial cost of building and improvements 42,768      
Cost Capitalized Subsequent to Acquisition 2,245      
Carrying amount of land and land improvements 2,454      
Carrying amount of building and improvements 44,900      
Accumulated depreciation 10,891      
Calgary, AB 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,569      
Initial cost of building and improvements 70,199      
Cost Capitalized Subsequent to Acquisition 3,617      
Carrying amount of land and land improvements 4,789      
Carrying amount of building and improvements 73,596      
Accumulated depreciation 17,735      
Callaway, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,464      
Initial cost of building and improvements 10,637      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,464      
Carrying amount of building and improvements 10,637      
Accumulated depreciation 68      
Camp Hill, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 517      
Initial cost of building and improvements 3,596      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 517      
Carrying amount of building and improvements 3,596      
Accumulated depreciation 537      
Canonsburg, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 911      
Initial cost of building and improvements 4,828      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 911      
Carrying amount of building and improvements 4,828      
Accumulated depreciation 786      
Canton, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 300      
Initial cost of building and improvements 2,098      
Cost Capitalized Subsequent to Acquisition 181      
Carrying amount of land and land improvements 300      
Carrying amount of building and improvements 2,279      
Accumulated depreciation 1,363      
Canton, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,399      
Initial cost of building and improvements 16,966      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,399      
Carrying amount of building and improvements 16,966      
Accumulated depreciation 2,441      
Cape Coral, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 530      
Initial cost of building and improvements 3,281      
Cost Capitalized Subsequent to Acquisition 35      
Carrying amount of land and land improvements 530      
Carrying amount of building and improvements 3,316      
Accumulated depreciation 1,863      
Cape Coral, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,802      
Initial cost of building and improvements 14,467      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,802      
Carrying amount of building and improvements 14,467      
Accumulated depreciation 92      
Carlisle, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 978      
Initial cost of building and improvements 8,204      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 978      
Carrying amount of building and improvements 8,204      
Accumulated depreciation 1,256      
Carmel, IN 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,700      
Initial cost of building and improvements 19,491      
Cost Capitalized Subsequent to Acquisition 1      
Carrying amount of land and land improvements 1,700      
Carrying amount of building and improvements 19,492      
Accumulated depreciation 4,723      
Carmel, IN 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,222      
Initial cost of building and improvements 31,004      
Cost Capitalized Subsequent to Acquisition 749      
Carrying amount of land and land improvements 2,222      
Carrying amount of building and improvements 31,753      
Accumulated depreciation 2,596      
Carrollton, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,010      
Initial cost of building and improvements 19,549      
Cost Capitalized Subsequent to Acquisition 224      
Carrying amount of land and land improvements 2,010      
Carrying amount of building and improvements 19,773      
Accumulated depreciation 3,854      
Cary, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,500      
Initial cost of building and improvements 4,350      
Cost Capitalized Subsequent to Acquisition 1,980      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 6,330      
Accumulated depreciation 3,413      
Castleton, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 920      
Initial cost of building and improvements 15,137      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 920      
Carrying amount of building and improvements 15,137      
Accumulated depreciation 4,181      
Cedar Rapids, IA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 596      
Initial cost of building and improvements 9,354      
Cost Capitalized Subsequent to Acquisition 16      
Carrying amount of land and land improvements 614      
Carrying amount of building and improvements 9,352      
Accumulated depreciation 1,321      
Centerville, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 920      
Initial cost of building and improvements 3,958      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 920      
Carrying amount of building and improvements 3,958      
Accumulated depreciation 866      
Chagrin Falls, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 832      
Initial cost of building and improvements 10,837      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 832      
Carrying amount of building and improvements 10,837      
Accumulated depreciation 1,633      
Chambersburg, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,373      
Initial cost of building and improvements 8,862      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,373      
Carrying amount of building and improvements 8,862      
Accumulated depreciation 1,404      
Chapel Hill, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 354      
Initial cost of building and improvements 2,646      
Cost Capitalized Subsequent to Acquisition 1,617      
Carrying amount of land and land improvements 354      
Carrying amount of building and improvements 4,263      
Accumulated depreciation 1,970      
Chatham, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 320      
Initial cost of building and improvements 14,039      
Cost Capitalized Subsequent to Acquisition 300      
Carrying amount of land and land improvements 320      
Carrying amount of building and improvements 14,339      
Accumulated depreciation 3,735      
Chattanooga, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,085      
Initial cost of building and improvements 11,837      
Cost Capitalized Subsequent to Acquisition 1,128      
Carrying amount of land and land improvements 2,085      
Carrying amount of building and improvements 12,965      
Accumulated depreciation 3,920      
Cherry Hill, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,416      
Initial cost of building and improvements 9,871      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,416      
Carrying amount of building and improvements 9,871      
Accumulated depreciation 1,548      
Chester, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,320      
Initial cost of building and improvements 18,127      
Cost Capitalized Subsequent to Acquisition 532      
Carrying amount of land and land improvements 1,320      
Carrying amount of building and improvements 18,659      
Accumulated depreciation 4,776      
Chevy Chase, MD | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,515      
Initial cost of building and improvements 8,685      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,515      
Carrying amount of building and improvements 8,685      
Accumulated depreciation 1,282      
Chickasha, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 85      
Initial cost of building and improvements 1,395      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 85      
Carrying amount of building and improvements 1,395      
Accumulated depreciation 994      
Chillicothe, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,145      
Initial cost of building and improvements 8,994      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,145      
Carrying amount of building and improvements 8,994      
Accumulated depreciation 1,318      
Cincinnati, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 912      
Initial cost of building and improvements 14,010      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 912      
Carrying amount of building and improvements 14,010      
Accumulated depreciation 2,086      
Citrus Heights, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,207      
Initial cost of building and improvements 31,715      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,207      
Carrying amount of building and improvements 31,715      
Accumulated depreciation 4,442      
Claremore, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 155      
Initial cost of building and improvements 1,427      
Cost Capitalized Subsequent to Acquisition 6,130      
Carrying amount of land and land improvements 155      
Carrying amount of building and improvements 7,557      
Accumulated depreciation 2,531      
Clarksville, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 330      
Initial cost of building and improvements 2,292      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 2,292      
Accumulated depreciation 1,485      
Clayton, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 520      
Initial cost of building and improvements 15,733      
Cost Capitalized Subsequent to Acquisition 183      
Carrying amount of land and land improvements 520      
Carrying amount of building and improvements 15,916      
Accumulated depreciation 3,934      
Clearwater, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,149      
Initial cost of building and improvements 7,762      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,149      
Carrying amount of building and improvements 7,762      
Accumulated depreciation 59      
Cleburne, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,113      
Initial cost of building and improvements 10,484      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,113      
Carrying amount of building and improvements 10,484      
Accumulated depreciation 1,343      
Clevedon, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,838      
Initial cost of building and improvements 16,927      
Cost Capitalized Subsequent to Acquisition 650      
Carrying amount of land and land improvements 2,931      
Carrying amount of building and improvements 17,484      
Accumulated depreciation 4,301      
Clifton, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,881      
Initial cost of building and improvements 34,941      
Cost Capitalized Subsequent to Acquisition 66      
Carrying amount of land and land improvements 3,881      
Carrying amount of building and improvements 35,007      
Accumulated depreciation 3,173      
Cloquet, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 340      
Initial cost of building and improvements 4,660      
Cost Capitalized Subsequent to Acquisition 120      
Carrying amount of land and land improvements 340      
Carrying amount of building and improvements 4,780      
Accumulated depreciation 1,638      
Cobham, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 9,808      
Initial cost of building and improvements 24,991      
Cost Capitalized Subsequent to Acquisition 1,145      
Carrying amount of land and land improvements 10,131      
Carrying amount of building and improvements 25,813      
Accumulated depreciation 7,030      
Colorado Springs, CO 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,280      
Initial cost of building and improvements 62,168      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,280      
Carrying amount of building and improvements 62,168      
Accumulated depreciation 13,324      
Colorado Springs, CO 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,730      
Initial cost of building and improvements 25,493      
Cost Capitalized Subsequent to Acquisition 693      
Carrying amount of land and land improvements 1,730      
Carrying amount of building and improvements 26,186      
Accumulated depreciation 5,918      
Columbia, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 341      
Initial cost of building and improvements 2,295      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 341      
Carrying amount of building and improvements 2,295      
Accumulated depreciation 1,483      
Columbia, SC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,699      
Initial cost of building and improvements 2,319      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,699      
Carrying amount of building and improvements 2,319      
Accumulated depreciation 380      
Columbia Heights, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 825      
Initial cost of building and improvements 14,175      
Cost Capitalized Subsequent to Acquisition 163      
Carrying amount of land and land improvements 825      
Carrying amount of building and improvements 14,338      
Accumulated depreciation 4,626      
Concord, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 550      
Initial cost of building and improvements 3,921      
Cost Capitalized Subsequent to Acquisition 715      
Carrying amount of land and land improvements 550      
Carrying amount of building and improvements 4,636      
Accumulated depreciation 2,273      
Congleton, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,036      
Initial cost of building and improvements 5,120      
Cost Capitalized Subsequent to Acquisition 235      
Carrying amount of land and land improvements 2,103      
Carrying amount of building and improvements 5,288      
Accumulated depreciation 1,278      
Connor, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 512      
Initial cost of building and improvements 3,714      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 512      
Carrying amount of building and improvements 3,714      
Accumulated depreciation 138      
Connor, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 331      
Initial cost of building and improvements 2,406      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 331      
Carrying amount of building and improvements 2,406      
Accumulated depreciation 89      
Conroe, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,440      
Initial cost of building and improvements 6,091      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,440      
Carrying amount of building and improvements 6,091      
Accumulated depreciation 791      
Corby, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,228      
Initial cost of building and improvements 5,144      
Cost Capitalized Subsequent to Acquisition 392      
Carrying amount of land and land improvements 1,156      
Carrying amount of building and improvements 5,608      
Accumulated depreciation 1,018      
Costa Mesa, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,050      
Initial cost of building and improvements 19,969      
Cost Capitalized Subsequent to Acquisition 1,093      
Carrying amount of land and land improvements 2,050      
Carrying amount of building and improvements 21,062      
Accumulated depreciation 8,329      
Coventry, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 16,311      
Carrying amount of land and land improvements 2,026      
Carrying amount of building and improvements 14,285      
Accumulated depreciation 3,335      
Crawfordsville, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 720      
Initial cost of building and improvements 17,239      
Cost Capitalized Subsequent to Acquisition 1,426      
Carrying amount of land and land improvements 720      
Carrying amount of building and improvements 18,665      
Accumulated depreciation 4,991      
Crestview, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,139      
Initial cost of building and improvements 17,281      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,139      
Carrying amount of building and improvements 17,281      
Accumulated depreciation 108      
Cypress, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,145      
Initial cost of building and improvements 14,446      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,145      
Carrying amount of building and improvements 14,446      
Accumulated depreciation 1,813      
Dallastown, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,377      
Initial cost of building and improvements 16,797      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,377      
Carrying amount of building and improvements 16,797      
Accumulated depreciation 2,504      
Danville, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 410      
Initial cost of building and improvements 3,954      
Cost Capitalized Subsequent to Acquisition 1,097      
Carrying amount of land and land improvements 410      
Carrying amount of building and improvements 5,051      
Accumulated depreciation 2,536      
Danville, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 240      
Initial cost of building and improvements 8,436      
Cost Capitalized Subsequent to Acquisition 1,352      
Carrying amount of land and land improvements 240      
Carrying amount of building and improvements 9,788      
Accumulated depreciation 2,339      
Daphne, AL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,880      
Initial cost of building and improvements 8,670      
Cost Capitalized Subsequent to Acquisition 872      
Carrying amount of land and land improvements 2,880      
Carrying amount of building and improvements 9,542      
Accumulated depreciation 2,948      
Davenport, IA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 566      
Initial cost of building and improvements 2,017      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 566      
Carrying amount of building and improvements 2,017      
Accumulated depreciation 308      
Davenport, IA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 910      
Initial cost of building and improvements 20,038      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 910      
Carrying amount of building and improvements 20,038      
Accumulated depreciation 2,904      
Dayton, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,188      
Initial cost of building and improvements 5,412      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,188      
Carrying amount of building and improvements 5,412      
Accumulated depreciation 860      
Dearborn Heights, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,197      
Initial cost of building and improvements 3,394      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,197      
Carrying amount of building and improvements 3,394      
Accumulated depreciation 594      
Decatur, GA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,413      
Initial cost of building and improvements 13,796      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,413      
Carrying amount of building and improvements 13,796      
Accumulated depreciation 1,913      
Delray Beach, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,158      
Initial cost of building and improvements 13,572      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,158      
Carrying amount of building and improvements 13,572      
Accumulated depreciation 2,036      
Delray Beach, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,125      
Initial cost of building and improvements 11,840      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,125      
Carrying amount of building and improvements 11,840      
Accumulated depreciation 1,826      
Deltona, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,095      
Initial cost of building and improvements 16,042      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,095      
Carrying amount of building and improvements 16,042      
Accumulated depreciation 259      
Denver, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,222      
Initial cost of building and improvements 24,804      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,222      
Carrying amount of building and improvements 24,804      
Accumulated depreciation 3,455      
Derby, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 10,888      
Carrying amount of land and land improvements 2,357      
Carrying amount of building and improvements 8,531      
Accumulated depreciation 1,796      
Dowagiac, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 825      
Initial cost of building and improvements 1,778      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 825      
Carrying amount of building and improvements 1,778      
Accumulated depreciation 406      
Droitwich, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,278      
Carrying amount of land and land improvements 3,633      
Carrying amount of building and improvements 11,645      
Accumulated depreciation 1,083      
Dublin, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,393      
Initial cost of building and improvements 2,911      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,393      
Carrying amount of building and improvements 2,911      
Accumulated depreciation 528      
Dubuque, IA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 568      
Initial cost of building and improvements 8,902      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 568      
Carrying amount of building and improvements 8,902      
Accumulated depreciation 1,260      
Dunedin, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,883      
Initial cost of building and improvements 13,325      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,883      
Carrying amount of building and improvements 13,325      
Accumulated depreciation 1,897      
Dunedin, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,151      
Initial cost of building and improvements 8,978      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,151      
Carrying amount of building and improvements 8,978      
Accumulated depreciation 59      
Dunedin, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 445      
Initial cost of building and improvements 1,275      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 445      
Carrying amount of building and improvements 1,275      
Accumulated depreciation 13      
Dunmurry, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,014      
Initial cost of building and improvements 6,086      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,014      
Carrying amount of building and improvements 6,086      
Accumulated depreciation 242      
Durham, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,476      
Initial cost of building and improvements 10,659      
Cost Capitalized Subsequent to Acquisition 3,569      
Carrying amount of land and land improvements 1,476      
Carrying amount of building and improvements 14,228      
Accumulated depreciation 12,900      
Eagan, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 14,910      
Initial cost of land and land improvements 2,260      
Initial cost of building and improvements 31,643      
Cost Capitalized Subsequent to Acquisition 300      
Carrying amount of land and land improvements 2,260      
Carrying amount of building and improvements 31,943      
Accumulated depreciation 6,714      
East Brunswick, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,380      
Initial cost of building and improvements 34,229      
Cost Capitalized Subsequent to Acquisition 1,270      
Carrying amount of land and land improvements 1,380      
Carrying amount of building and improvements 35,499      
Accumulated depreciation 11,547      
Eastbourne, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,071      
Initial cost of building and improvements 24,438      
Cost Capitalized Subsequent to Acquisition 938      
Carrying amount of land and land improvements 4,205      
Carrying amount of building and improvements 25,242      
Accumulated depreciation 6,130      
Easton, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,109      
Initial cost of building and improvements 7,500      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,109      
Carrying amount of building and improvements 7,500      
Accumulated depreciation 1,455      
Easton, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,430      
Initial cost of building and improvements 13,396      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,430      
Carrying amount of building and improvements 13,396      
Accumulated depreciation 2,006      
Easton, PA 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,620      
Initial cost of building and improvements 10,049      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,620      
Carrying amount of building and improvements 10,049      
Accumulated depreciation 1,777      
Eden, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 390      
Initial cost of building and improvements 4,877      
Cost Capitalized Subsequent to Acquisition 351      
Carrying amount of land and land improvements 390      
Carrying amount of building and improvements 5,228      
Accumulated depreciation 2,637      
Edmond, OK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,810      
Initial cost of building and improvements 14,849      
Cost Capitalized Subsequent to Acquisition 3,843      
Carrying amount of land and land improvements 1,810      
Carrying amount of building and improvements 18,692      
Accumulated depreciation 4,482      
Edmond, OK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,650      
Initial cost of building and improvements 25,167      
Cost Capitalized Subsequent to Acquisition 1,722      
Carrying amount of land and land improvements 1,650      
Carrying amount of building and improvements 26,889      
Accumulated depreciation 4,993      
Elizabeth City, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 2,760      
Cost Capitalized Subsequent to Acquisition 2,841      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,601      
Accumulated depreciation 2,886      
Elk Grove Village, IL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,344      
Initial cost of building and improvements 7,073      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,344      
Carrying amount of building and improvements 7,073      
Accumulated depreciation 1,108      
Elk Grove Village, IL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,733      
Initial cost of building and improvements 18,745      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,733      
Carrying amount of building and improvements 18,745      
Accumulated depreciation 2,598      
Encinitas, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,460      
Initial cost of building and improvements 7,721      
Cost Capitalized Subsequent to Acquisition 2,229      
Carrying amount of land and land improvements 1,460      
Carrying amount of building and improvements 9,950      
Accumulated depreciation 6,047      
Englewood, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,832      
Initial cost of building and improvements 14,851      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,832      
Carrying amount of building and improvements 14,851      
Accumulated depreciation 93      
Escondido, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,520      
Initial cost of building and improvements 24,024      
Cost Capitalized Subsequent to Acquisition 1,386      
Carrying amount of land and land improvements 1,520      
Carrying amount of building and improvements 25,410      
Accumulated depreciation 9,671      
Everett, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,400      
Initial cost of building and improvements 5,476      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,400      
Carrying amount of building and improvements 5,476      
Accumulated depreciation 3,472      
Exton, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,600      
Initial cost of building and improvements 27,267      
Cost Capitalized Subsequent to Acquisition 342      
Carrying amount of land and land improvements 3,600      
Carrying amount of building and improvements 27,609      
Accumulated depreciation 4,826      
Fairfax, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,827      
Initial cost of building and improvements 17,304      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,827      
Carrying amount of building and improvements 17,304      
Accumulated depreciation 2,614      
Fairfax, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,099      
Initial cost of building and improvements 17,614      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,099      
Carrying amount of building and improvements 17,614      
Accumulated depreciation 2,604      
Fairhope, AL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 570      
Initial cost of building and improvements 9,119      
Cost Capitalized Subsequent to Acquisition 236      
Carrying amount of land and land improvements 570      
Carrying amount of building and improvements 9,355      
Accumulated depreciation 2,936      
Fall River, MA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 620      
Initial cost of building and improvements 5,829      
Cost Capitalized Subsequent to Acquisition 4,856      
Carrying amount of land and land improvements 620      
Carrying amount of building and improvements 10,685      
Accumulated depreciation 6,724      
Fanwood, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,850      
Initial cost of building and improvements 55,175      
Cost Capitalized Subsequent to Acquisition 2,117      
Carrying amount of land and land improvements 2,850      
Carrying amount of building and improvements 57,292      
Accumulated depreciation 18,230      
Faribault, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 780      
Initial cost of building and improvements 11,539      
Cost Capitalized Subsequent to Acquisition 300      
Carrying amount of land and land improvements 780      
Carrying amount of building and improvements 11,839      
Accumulated depreciation 2,495      
Farmington, CT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,693      
Initial cost of building and improvements 10,455      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,693      
Carrying amount of building and improvements 10,455      
Accumulated depreciation 1,611      
Farnborough, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,036      
Initial cost of building and improvements 5,737      
Cost Capitalized Subsequent to Acquisition 255      
Carrying amount of land and land improvements 2,103      
Carrying amount of building and improvements 5,925      
Accumulated depreciation 1,391      
Fayetteville, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,150      
Initial cost of building and improvements 20,318      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,150      
Carrying amount of building and improvements 20,318      
Accumulated depreciation 6,102      
Fayetteville, NY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 410      
Initial cost of building and improvements 3,962      
Cost Capitalized Subsequent to Acquisition 500      
Carrying amount of land and land improvements 410      
Carrying amount of building and improvements 4,462      
Accumulated depreciation 2,508      
Findlay, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 1,800      
Cost Capitalized Subsequent to Acquisition 515      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 2,315      
Accumulated depreciation 1,232      
Fishersville, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 788      
Initial cost of building and improvements 2,101      
Cost Capitalized Subsequent to Acquisition 3      
Carrying amount of land and land improvements 788      
Carrying amount of building and improvements 2,104      
Accumulated depreciation 1,623      
Flint, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,271      
Initial cost of building and improvements 18,050      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,271      
Carrying amount of building and improvements 18,050      
Accumulated depreciation 2,534      
Florence, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 300      
Initial cost of building and improvements 2,978      
Cost Capitalized Subsequent to Acquisition 89      
Carrying amount of land and land improvements 300      
Carrying amount of building and improvements 3,067      
Accumulated depreciation 1,687      
Floyd, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 680      
Initial cost of building and improvements 3,618      
Cost Capitalized Subsequent to Acquisition 4      
Carrying amount of land and land improvements 680      
Carrying amount of building and improvements 3,622      
Accumulated depreciation 1,332      
Forest City, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 320      
Initial cost of building and improvements 4,497      
Cost Capitalized Subsequent to Acquisition 366      
Carrying amount of land and land improvements 320      
Carrying amount of building and improvements 4,863      
Accumulated depreciation 2,446      
Fort Collins, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,680      
Initial cost of building and improvements 58,608      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,680      
Carrying amount of building and improvements 58,608      
Accumulated depreciation 12,521      
Fort Lauderdale, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,043      
Initial cost of building and improvements 6,429      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,043      
Carrying amount of building and improvements 6,429      
Accumulated depreciation 97      
Fort Myers, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,205      
Initial cost of building and improvements 15,100      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,205      
Carrying amount of building and improvements 15,100      
Accumulated depreciation 103      
Fort Myers, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,110      
Initial cost of building and improvements 10,559      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,110      
Carrying amount of building and improvements 10,559      
Accumulated depreciation 1,600      
Fort Myers, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,139      
Initial cost of building and improvements 18,235      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,139      
Carrying amount of building and improvements 18,235      
Accumulated depreciation 2,703      
Fort Myers, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,502      
Initial cost of building and improvements 9,741      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,502      
Carrying amount of building and improvements 9,741      
Accumulated depreciation 1,746      
Fort Pierce, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,282      
Initial cost of building and improvements 20,775      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,282      
Carrying amount of building and improvements 20,775      
Accumulated depreciation 291      
Fort Worth, TX 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 450      
Initial cost of building and improvements 13,615      
Cost Capitalized Subsequent to Acquisition 5,086      
Carrying amount of land and land improvements 450      
Carrying amount of building and improvements 18,701      
Accumulated depreciation 7,099      
Fort Worth, TX 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,565      
Initial cost of building and improvements 15,864      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,565      
Carrying amount of building and improvements 15,864      
Accumulated depreciation 1,980      
Fountain Valley, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,259      
Initial cost of building and improvements 9,375      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,259      
Carrying amount of building and improvements 9,375      
Accumulated depreciation 1,382      
Fredericksburg, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,000      
Initial cost of building and improvements 20,000      
Cost Capitalized Subsequent to Acquisition 2,220      
Carrying amount of land and land improvements 1,000      
Carrying amount of building and improvements 22,220      
Accumulated depreciation 10,081      
Fredericksburg, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,130      
Initial cost of building and improvements 23,202      
Cost Capitalized Subsequent to Acquisition 716      
Carrying amount of land and land improvements 1,130      
Carrying amount of building and improvements 23,918      
Accumulated depreciation 6,051      
Gahanna, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,432      
Initial cost of building and improvements 34,645      
Cost Capitalized Subsequent to Acquisition 530      
Carrying amount of land and land improvements 2,432      
Carrying amount of building and improvements 35,175      
Accumulated depreciation 2,638      
Gainesville, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 972      
Initial cost of building and improvements 8,809      
Cost Capitalized Subsequent to Acquisition 125      
Carrying amount of land and land improvements 972      
Carrying amount of building and improvements 8,934      
Accumulated depreciation 1,066      
Gainesville, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,109      
Initial cost of building and improvements 12,443      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,109      
Carrying amount of building and improvements 12,443      
Accumulated depreciation 202      
Galesburg, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,708      
Initial cost of building and improvements 3,839      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,708      
Carrying amount of building and improvements 3,839      
Accumulated depreciation 576      
Gardner, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 2,800      
Cost Capitalized Subsequent to Acquisition 98      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 2,898      
Accumulated depreciation 703      
Gastonia, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 470      
Initial cost of building and improvements 6,129      
Cost Capitalized Subsequent to Acquisition 284      
Carrying amount of land and land improvements 470      
Carrying amount of building and improvements 6,413      
Accumulated depreciation 3,268      
Gastonia, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 310      
Initial cost of building and improvements 3,096      
Cost Capitalized Subsequent to Acquisition 113      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 3,209      
Accumulated depreciation 1,718      
Gastonia, NC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 400      
Initial cost of building and improvements 5,029      
Cost Capitalized Subsequent to Acquisition 807      
Carrying amount of land and land improvements 400      
Carrying amount of building and improvements 5,836      
Accumulated depreciation 2,800      
Geneva, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,502      
Initial cost of building and improvements 16,193      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,502      
Carrying amount of building and improvements 16,193      
Accumulated depreciation 2,391      
Georgetown, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 2,100      
Cost Capitalized Subsequent to Acquisition 110      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 2,210      
Accumulated depreciation 1,429      
Gig Harbor, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,000      
Initial cost of building and improvements 4,463      
Cost Capitalized Subsequent to Acquisition 689      
Carrying amount of land and land improvements 3,000      
Carrying amount of building and improvements 5,152      
Accumulated depreciation 812      
Glen Ellyn, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,496      
Initial cost of building and improvements 6,634      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,496      
Carrying amount of building and improvements 6,634      
Accumulated depreciation 1,090      
Granbury, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,550      
Initial cost of building and improvements 2,940      
Cost Capitalized Subsequent to Acquisition 883      
Carrying amount of land and land improvements 2,550      
Carrying amount of building and improvements 3,823      
Accumulated depreciation 1,443      
Green Cove Springs, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,275      
Initial cost of building and improvements 17,602      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,275      
Carrying amount of building and improvements 17,602      
Accumulated depreciation 295      
Greensboro, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 330      
Initial cost of building and improvements 2,970      
Cost Capitalized Subsequent to Acquisition 662      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 3,632      
Accumulated depreciation 1,921      
Greensboro, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 560      
Initial cost of building and improvements 5,507      
Cost Capitalized Subsequent to Acquisition 2,405      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 7,912      
Accumulated depreciation 3,628      
Greenville, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,490      
Initial cost of building and improvements 4,341      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,490      
Carrying amount of building and improvements 4,341      
Accumulated depreciation 777      
Greenville, SC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 310      
Initial cost of building and improvements 4,750      
Cost Capitalized Subsequent to Acquisition 521      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 5,271      
Accumulated depreciation 2,534      
Greenville, SC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,751      
Initial cost of building and improvements 8,771      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,751      
Carrying amount of building and improvements 8,771      
Accumulated depreciation 1,330      
Greenville, SC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 947      
Initial cost of building and improvements 1,445      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 947      
Carrying amount of building and improvements 1,445      
Accumulated depreciation 367      
Greenville, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 4,393      
Cost Capitalized Subsequent to Acquisition 353      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 4,746      
Accumulated depreciation 2,434      
Grosse Pointe, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 867      
Initial cost of building and improvements 2,385      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 867      
Carrying amount of building and improvements 2,385      
Accumulated depreciation 379      
Hamilton, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 440      
Initial cost of building and improvements 4,469      
Cost Capitalized Subsequent to Acquisition 209      
Carrying amount of land and land improvements 440      
Carrying amount of building and improvements 4,678      
Accumulated depreciation 2,530      
Hanford, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,382      
Initial cost of building and improvements 9,829      
Cost Capitalized Subsequent to Acquisition 368      
Carrying amount of land and land improvements 1,427      
Carrying amount of building and improvements 10,152      
Accumulated depreciation 2,793      
Harrisburg, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 569      
Initial cost of building and improvements 12,822      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 569      
Carrying amount of building and improvements 12,822      
Accumulated depreciation 1,884      
Harrow, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 7,402      
Initial cost of building and improvements 8,266      
Cost Capitalized Subsequent to Acquisition 516      
Carrying amount of land and land improvements 7,646      
Carrying amount of building and improvements 8,538      
Accumulated depreciation 2,143      
Hastings, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,603      
Initial cost of building and improvements 6,519      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,603      
Carrying amount of building and improvements 6,519      
Accumulated depreciation 974      
Hatboro, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 28,112      
Cost Capitalized Subsequent to Acquisition 1,771      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 29,883      
Accumulated depreciation 10,036      
Hatboro, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,192      
Initial cost of building and improvements 7,608      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,192      
Carrying amount of building and improvements 7,608      
Accumulated depreciation 1,525      
Hatfield, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,924      
Initial cost of building and improvements 7,527      
Cost Capitalized Subsequent to Acquisition 344      
Carrying amount of land and land improvements 3,020      
Carrying amount of building and improvements 7,775      
Accumulated depreciation 2,155      
Haverhill, MA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,519      
Initial cost of building and improvements 19,554      
Cost Capitalized Subsequent to Acquisition 64      
Carrying amount of land and land improvements 5,519      
Carrying amount of building and improvements 19,618      
Accumulated depreciation 1,469      
Hemet, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 6,224      
Initial cost of building and improvements 8,410      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 6,224      
Carrying amount of building and improvements 8,410      
Accumulated depreciation 1,284      
Hermitage, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,500      
Initial cost of building and improvements 9,943      
Cost Capitalized Subsequent to Acquisition 540      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 10,483      
Accumulated depreciation 3,286      
Herne Bay, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,900      
Initial cost of building and improvements 24,353      
Cost Capitalized Subsequent to Acquisition 1,577      
Carrying amount of land and land improvements 1,962      
Carrying amount of building and improvements 25,868      
Accumulated depreciation 7,534      
Hiawatha, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 40      
Initial cost of building and improvements 4,210      
Cost Capitalized Subsequent to Acquisition 31      
Carrying amount of land and land improvements 40      
Carrying amount of building and improvements 4,241      
Accumulated depreciation 994      
Hickory, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 987      
Cost Capitalized Subsequent to Acquisition 392      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 1,379      
Accumulated depreciation 777      
High Point, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 560      
Initial cost of building and improvements 4,443      
Cost Capitalized Subsequent to Acquisition 1,605      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 6,048      
Accumulated depreciation 2,862      
High Point, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 370      
Initial cost of building and improvements 2,185      
Cost Capitalized Subsequent to Acquisition 1,187      
Carrying amount of land and land improvements 370      
Carrying amount of building and improvements 3,372      
Accumulated depreciation 1,484      
High Point, NC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 330      
Initial cost of building and improvements 3,395      
Cost Capitalized Subsequent to Acquisition 142      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 3,537      
Accumulated depreciation 1,858      
High Point, NC 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 430      
Initial cost of building and improvements 4,143      
Cost Capitalized Subsequent to Acquisition 1,085      
Carrying amount of land and land improvements 430      
Carrying amount of building and improvements 5,228      
Accumulated depreciation 2,304      
Highlands Ranch, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 940      
Initial cost of building and improvements 3,721      
Cost Capitalized Subsequent to Acquisition 4,983      
Carrying amount of land and land improvements 940      
Carrying amount of building and improvements 8,704      
Accumulated depreciation 3,366      
Hillsboro, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,792      
Initial cost of building and improvements 6,339      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,792      
Carrying amount of building and improvements 6,339      
Accumulated depreciation 1,314      
Hinckley, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,159      
Initial cost of building and improvements 4,194      
Cost Capitalized Subsequent to Acquisition 209      
Carrying amount of land and land improvements 2,230      
Carrying amount of building and improvements 4,332      
Accumulated depreciation 1,316      
Hinsdale, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,033      
Initial cost of building and improvements 24,280      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,033      
Carrying amount of building and improvements 24,280      
Accumulated depreciation 3,388      
Holton, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 40      
Initial cost of building and improvements 7,460      
Cost Capitalized Subsequent to Acquisition 13      
Carrying amount of land and land improvements 40      
Carrying amount of building and improvements 7,473      
Accumulated depreciation 1,631      
Homewood, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,395      
Initial cost of building and improvements 7,649      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,395      
Carrying amount of building and improvements 7,649      
Accumulated depreciation 1,092      
Howard, WI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 579      
Initial cost of building and improvements 32,122      
Cost Capitalized Subsequent to Acquisition 5,943      
Carrying amount of land and land improvements 684      
Carrying amount of building and improvements 37,960      
Accumulated depreciation 6,899      
Huntingdon Valley, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,150      
Initial cost of building and improvements 3,728      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,150      
Carrying amount of building and improvements 3,728      
Accumulated depreciation 793      
Huntsville, AL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,382      
Initial cost of building and improvements 14,286      
Cost Capitalized Subsequent to Acquisition 90      
Carrying amount of land and land improvements 1,382      
Carrying amount of building and improvements 14,376      
Accumulated depreciation 1,519      
Independence, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,082      
Initial cost of building and improvements 6,767      
Cost Capitalized Subsequent to Acquisition 7      
Carrying amount of land and land improvements 1,082      
Carrying amount of building and improvements 6,774      
Accumulated depreciation 2,405      
Indianapolis, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 870      
Initial cost of building and improvements 14,688      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 870      
Carrying amount of building and improvements 14,688      
Accumulated depreciation 4,074      
Jackson, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 6,500      
Initial cost of building and improvements 26,405      
Cost Capitalized Subsequent to Acquisition 9,123      
Carrying amount of land and land improvements 6,500      
Carrying amount of building and improvements 35,528      
Accumulated depreciation 8,366      
Jacksonville, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,932      
Initial cost of building and improvements 14,269      
Cost Capitalized Subsequent to Acquisition 129      
Carrying amount of land and land improvements 2,932      
Carrying amount of building and improvements 14,398      
Accumulated depreciation 1,622      
Jacksonville, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,815      
Initial cost of building and improvements 15,096      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,815      
Carrying amount of building and improvements 15,096      
Accumulated depreciation 240      
Jacksonville, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,359      
Initial cost of building and improvements 13,338      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,359      
Carrying amount of building and improvements 13,338      
Accumulated depreciation 230      
Jefferson Hills, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,265      
Initial cost of building and improvements 13,614      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,265      
Carrying amount of building and improvements 13,614      
Accumulated depreciation 2,923      
Jersey Shore, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 600      
Initial cost of building and improvements 8,104      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 600      
Carrying amount of building and improvements 8,104      
Accumulated depreciation 1,115      
Kansas City, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 700      
Initial cost of building and improvements 20,115      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 700      
Carrying amount of building and improvements 20,115      
Accumulated depreciation 4,599      
Katy, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,778      
Initial cost of building and improvements 22,622      
Cost Capitalized Subsequent to Acquisition 31      
Carrying amount of land and land improvements 1,778      
Carrying amount of building and improvements 22,653      
Accumulated depreciation 4,357      
Kensington, MD | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,753      
Initial cost of building and improvements 18,621      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,753      
Carrying amount of building and improvements 18,621      
Accumulated depreciation 2,649      
Kenwood, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 821      
Initial cost of building and improvements 11,040      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 821      
Carrying amount of building and improvements 11,040      
Accumulated depreciation 1,623      
Kettering, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,229      
Initial cost of building and improvements 4,701      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,229      
Carrying amount of building and improvements 4,701      
Accumulated depreciation 786      
King of Prussia, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 720      
Initial cost of building and improvements 14,776      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 720      
Carrying amount of building and improvements 14,776      
Accumulated depreciation 2,252      
King of Prussia, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,205      
Initial cost of building and improvements 4,725      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,205      
Carrying amount of building and improvements 4,725      
Accumulated depreciation 851      
Kingsford, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,362      
Initial cost of building and improvements 10,594      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,362      
Carrying amount of building and improvements 10,594      
Accumulated depreciation 1,622      
Kirkstall, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,437      
Initial cost of building and improvements 9,414      
Cost Capitalized Subsequent to Acquisition 390      
Carrying amount of land and land improvements 2,517      
Carrying amount of building and improvements 9,724      
Accumulated depreciation 2,683      
Kissimmee, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,051      
Initial cost of building and improvements 16,254      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,051      
Carrying amount of building and improvements 16,254      
Accumulated depreciation 227      
Kissimmee, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 540      
Initial cost of building and improvements 4,474      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 540      
Carrying amount of building and improvements 4,474      
Accumulated depreciation 73      
Knoxville, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,207      
Initial cost of building and improvements 12,849      
Cost Capitalized Subsequent to Acquisition 1,270      
Carrying amount of land and land improvements 2,207      
Carrying amount of building and improvements 14,119      
Accumulated depreciation 4,291      
Kokomo, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 710      
Initial cost of building and improvements 16,044      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 710      
Carrying amount of building and improvements 16,044      
Accumulated depreciation 4,414      
Lacey, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,582      
Initial cost of building and improvements 18,175      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,582      
Carrying amount of building and improvements 18,175      
Accumulated depreciation 2,623      
Lafayette, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,420      
Initial cost of building and improvements 20,192      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,420      
Carrying amount of building and improvements 20,192      
Accumulated depreciation 4,860      
Lafayette, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 670      
Initial cost of building and improvements 16,834      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 16,834      
Accumulated depreciation 4,366      
Lake Mary, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,041      
Initial cost of building and improvements 15,428      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,041      
Carrying amount of building and improvements 15,428      
Accumulated depreciation 95      
Lakeland, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,524      
Initial cost of building and improvements 14,810      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,524      
Carrying amount of building and improvements 14,810      
Accumulated depreciation 252      
Lakeway, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,142      
Initial cost of building and improvements 23,203      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,142      
Carrying amount of building and improvements 23,203      
Accumulated depreciation 6,891      
Lakewood, CO | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,160      
Initial cost of building and improvements 28,091      
Cost Capitalized Subsequent to Acquisition 62      
Carrying amount of land and land improvements 2,160      
Carrying amount of building and improvements 28,153      
Accumulated depreciation 7,254      
Lancaster, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 289      
Initial cost of building and improvements 2,077      
Cost Capitalized Subsequent to Acquisition 3,490      
Carrying amount of land and land improvements 289      
Carrying amount of building and improvements 5,567      
Accumulated depreciation 326      
Lancaster, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,011      
Initial cost of building and improvements 7,502      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,011      
Carrying amount of building and improvements 7,502      
Accumulated depreciation 1,121      
Lapeer, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,827      
Initial cost of building and improvements 8,794      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,827      
Carrying amount of building and improvements 8,794      
Accumulated depreciation 1,234      
Largo, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,166      
Initial cost of building and improvements 3,426      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,166      
Carrying amount of building and improvements 3,426      
Accumulated depreciation 662      
Largo, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,443      
Initial cost of building and improvements 19,073      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,443      
Carrying amount of building and improvements 19,073      
Accumulated depreciation 336      
Laureldale, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,171      
Initial cost of building and improvements 14,420      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,171      
Carrying amount of building and improvements 14,420      
Accumulated depreciation 2,080      
Lebanon, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 728      
Initial cost of building and improvements 10,367      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 728      
Carrying amount of building and improvements 10,367      
Accumulated depreciation 1,637      
Lebanon, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,214      
Initial cost of building and improvements 5,960      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,214      
Carrying amount of building and improvements 5,960      
Accumulated depreciation 1,055      
Lecanto, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,817      
Initial cost of building and improvements 14,773      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,817      
Carrying amount of building and improvements 14,773      
Accumulated depreciation 92      
Lee, MA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 18,135      
Cost Capitalized Subsequent to Acquisition 926      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 19,061      
Accumulated depreciation 10,688      
Leeds, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,714      
Carrying amount of land and land improvements 2,039      
Carrying amount of building and improvements 13,675      
Accumulated depreciation 3,082      
Leicester, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 28,373      
Carrying amount of land and land improvements 3,160      
Carrying amount of building and improvements 25,213      
Accumulated depreciation 7,245      
Lenoir, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 190      
Initial cost of building and improvements 3,748      
Cost Capitalized Subsequent to Acquisition 950      
Carrying amount of land and land improvements 190      
Carrying amount of building and improvements 4,698      
Accumulated depreciation 2,376      
Lethbridge, AB | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,214      
Initial cost of building and improvements 2,750      
Cost Capitalized Subsequent to Acquisition 202      
Carrying amount of land and land improvements 1,273      
Carrying amount of building and improvements 2,893      
Accumulated depreciation 878      
Lexana, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 480      
Initial cost of building and improvements 1,770      
Cost Capitalized Subsequent to Acquisition 162      
Carrying amount of land and land improvements 480      
Carrying amount of building and improvements 1,932      
Accumulated depreciation 512      
Lexington, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 3,900      
Cost Capitalized Subsequent to Acquisition 1,153      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,053      
Accumulated depreciation 2,718      
Libertyville, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,993      
Initial cost of building and improvements 11,546      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,993      
Carrying amount of building and improvements 11,546      
Accumulated depreciation 1,634      
Lichfield, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,382      
Initial cost of building and improvements 30,324      
Cost Capitalized Subsequent to Acquisition 1,043      
Carrying amount of land and land improvements 1,427      
Carrying amount of building and improvements 31,322      
Accumulated depreciation 7,040      
Lillington, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 470      
Initial cost of building and improvements 17,579      
Cost Capitalized Subsequent to Acquisition 774      
Carrying amount of land and land improvements 470      
Carrying amount of building and improvements 18,353      
Accumulated depreciation 4,719      
Lillington, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 500      
Initial cost of building and improvements 16,451      
Cost Capitalized Subsequent to Acquisition 331      
Carrying amount of land and land improvements 500      
Carrying amount of building and improvements 16,782      
Accumulated depreciation 4,109      
Livermore, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,100      
Initial cost of building and improvements 24,996      
Cost Capitalized Subsequent to Acquisition 79      
Carrying amount of land and land improvements 4,100      
Carrying amount of building and improvements 25,075      
Accumulated depreciation 5,824      
Livonia, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 985      
Initial cost of building and improvements 13,555      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 985      
Carrying amount of building and improvements 13,555      
Accumulated depreciation 2,064      
Longwood, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,260      
Initial cost of building and improvements 6,445      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,260      
Carrying amount of building and improvements 6,445      
Accumulated depreciation 2,305      
Los Angeles, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 11,430      
Cost Capitalized Subsequent to Acquisition 1,285      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 12,715      
Accumulated depreciation 5,055      
Louisburg, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 280      
Initial cost of building and improvements 4,320      
Cost Capitalized Subsequent to Acquisition 47      
Carrying amount of land and land improvements 280      
Carrying amount of building and improvements 4,367      
Accumulated depreciation 967      
Louisville, KY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 490      
Initial cost of building and improvements 10,010      
Cost Capitalized Subsequent to Acquisition 2,768      
Carrying amount of land and land improvements 490      
Carrying amount of building and improvements 12,778      
Accumulated depreciation 6,268      
Loxley, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,369      
Initial cost of building and improvements 15,668      
Cost Capitalized Subsequent to Acquisition 1,313      
Carrying amount of land and land improvements 1,414      
Carrying amount of building and improvements 16,936      
Accumulated depreciation 4,607      
Lutherville, MD | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,100      
Initial cost of building and improvements 19,786      
Cost Capitalized Subsequent to Acquisition 1,744      
Carrying amount of land and land improvements 1,100      
Carrying amount of building and improvements 21,530      
Accumulated depreciation 7,404      
Lynchburg, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 340      
Initial cost of building and improvements 16,114      
Cost Capitalized Subsequent to Acquisition 463      
Carrying amount of land and land improvements 340      
Carrying amount of building and improvements 16,577      
Accumulated depreciation 4,355      
Lynchburg, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,904      
Initial cost of building and improvements 3,696      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,904      
Carrying amount of building and improvements 3,696      
Accumulated depreciation 546      
Lynnwood, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,302      
Initial cost of building and improvements 5,632      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,302      
Carrying amount of building and improvements 5,632      
Accumulated depreciation 843      
Manalapan, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 900      
Initial cost of building and improvements 22,624      
Cost Capitalized Subsequent to Acquisition 1,273      
Carrying amount of land and land improvements 900      
Carrying amount of building and improvements 23,897      
Accumulated depreciation 7,712      
Manassas, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 750      
Initial cost of building and improvements 7,446      
Cost Capitalized Subsequent to Acquisition 1,384      
Carrying amount of land and land improvements 750      
Carrying amount of building and improvements 8,830      
Accumulated depreciation 4,107      
Mankato, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,460      
Initial cost of building and improvements 32,104      
Cost Capitalized Subsequent to Acquisition 300      
Carrying amount of land and land improvements 1,460      
Carrying amount of building and improvements 32,404      
Accumulated depreciation 6,788      
Marietta, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,149      
Initial cost of building and improvements 9,373      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,149      
Carrying amount of building and improvements 9,373      
Accumulated depreciation 1,372      
Marietta, GA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,406      
Initial cost of building and improvements 12,229      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,406      
Carrying amount of building and improvements 12,229      
Accumulated depreciation 1,751      
Marietta, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,050      
Initial cost of building and improvements 13,633      
Cost Capitalized Subsequent to Acquisition 801      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 14,434      
Accumulated depreciation 3,021      
Marion, IN 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 720      
Initial cost of building and improvements 9,604      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 720      
Carrying amount of building and improvements 9,604      
Accumulated depreciation 3,320      
Marion, IN 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 990      
Initial cost of building and improvements 7,600      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 7,600      
Accumulated depreciation 4,157      
Marion, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,768      
Initial cost of building and improvements 17,415      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,768      
Carrying amount of building and improvements 17,415      
Accumulated depreciation 3,245      
Marlborough, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,677      
Initial cost of building and improvements 6,822      
Cost Capitalized Subsequent to Acquisition 313      
Carrying amount of land and land improvements 2,765      
Carrying amount of building and improvements 7,047      
Accumulated depreciation 1,727      
Martinsville, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 349      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 349      
Carrying amount of building and improvements 0      
Accumulated depreciation 0      
Marysville, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 408      
Initial cost of building and improvements 858      
Cost Capitalized Subsequent to Acquisition 2,833      
Carrying amount of land and land improvements 408      
Carrying amount of building and improvements 3,691      
Accumulated depreciation 254      
Matthews, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 560      
Initial cost of building and improvements 4,738      
Cost Capitalized Subsequent to Acquisition 797      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 5,535      
Accumulated depreciation 2,642      
Mchenry, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,576      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,576      
Carrying amount of building and improvements 0      
Accumulated depreciation 0      
Mcmurray, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,440      
Initial cost of building and improvements 15,805      
Cost Capitalized Subsequent to Acquisition 3,915      
Carrying amount of land and land improvements 1,440      
Carrying amount of building and improvements 19,720      
Accumulated depreciation 6,386      
Medicine Hat, AB | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 932      
Initial cost of building and improvements 5,566      
Cost Capitalized Subsequent to Acquisition 323      
Carrying amount of land and land improvements 977      
Carrying amount of building and improvements 5,844      
Accumulated depreciation 1,489      
Mentor, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,827      
Initial cost of building and improvements 9,938      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,827      
Carrying amount of building and improvements 9,938      
Accumulated depreciation 1,474      
Mequon, WI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,238      
Initial cost of building and improvements 17,761      
Cost Capitalized Subsequent to Acquisition 600      
Carrying amount of land and land improvements 2,238      
Carrying amount of building and improvements 18,361      
Accumulated depreciation 1,435      
Merritt Island, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,498      
Initial cost of building and improvements 14,335      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,498      
Carrying amount of building and improvements 14,335      
Accumulated depreciation 226      
Miamisburg, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 786      
Initial cost of building and improvements 3,232      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 786      
Carrying amount of building and improvements 3,232      
Accumulated depreciation 676      
Miamisburg, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 7,040      
Carrying amount of land and land improvements 1,215      
Carrying amount of building and improvements 5,825      
Accumulated depreciation 43      
Middleton, WI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 420      
Initial cost of building and improvements 4,006      
Cost Capitalized Subsequent to Acquisition 669      
Carrying amount of land and land improvements 420      
Carrying amount of building and improvements 4,675      
Accumulated depreciation 2,481      
Midlothian, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,015      
Initial cost of building and improvements 8,602      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,015      
Carrying amount of building and improvements 8,602      
Accumulated depreciation 983      
Milton Keynes, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 21,153      
Carrying amount of land and land improvements 1,886      
Carrying amount of building and improvements 19,267      
Accumulated depreciation 4,460      
Minnetonka, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,080      
Initial cost of building and improvements 24,360      
Cost Capitalized Subsequent to Acquisition 4,154      
Carrying amount of land and land improvements 2,080      
Carrying amount of building and improvements 28,514      
Accumulated depreciation 9,483      
Mishawaka, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 740      
Initial cost of building and improvements 12,514      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 740      
Carrying amount of building and improvements 12,514      
Accumulated depreciation 3,868      
Moline, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,946      
Initial cost of building and improvements 18,672      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,946      
Carrying amount of building and improvements 18,672      
Accumulated depreciation 2,587      
Monroe, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 470      
Initial cost of building and improvements 3,681      
Cost Capitalized Subsequent to Acquisition 1,010      
Carrying amount of land and land improvements 470      
Carrying amount of building and improvements 4,691      
Accumulated depreciation 2,364      
Monroe, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 310      
Initial cost of building and improvements 4,799      
Cost Capitalized Subsequent to Acquisition 1,122      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 5,921      
Accumulated depreciation 2,994      
Monroe, NC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 450      
Initial cost of building and improvements 4,021      
Cost Capitalized Subsequent to Acquisition 444      
Carrying amount of land and land improvements 450      
Carrying amount of building and improvements 4,465      
Accumulated depreciation 2,264      
Monroe Township, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,250      
Initial cost of building and improvements 27,771      
Cost Capitalized Subsequent to Acquisition 1,197      
Carrying amount of land and land improvements 3,250      
Carrying amount of building and improvements 28,968      
Accumulated depreciation 6,205      
Monroeville, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,216      
Initial cost of building and improvements 12,749      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,216      
Carrying amount of building and improvements 12,749      
Accumulated depreciation 2,246      
Monroeville, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,237      
Initial cost of building and improvements 3,641      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,237      
Carrying amount of building and improvements 3,641      
Accumulated depreciation 855      
Montgomeryville, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,176      
Initial cost of building and improvements 9,824      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,176      
Carrying amount of building and improvements 9,824      
Accumulated depreciation 1,531      
Montville, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,500      
Initial cost of building and improvements 31,002      
Cost Capitalized Subsequent to Acquisition 2,762      
Carrying amount of land and land improvements 3,500      
Carrying amount of building and improvements 33,764      
Accumulated depreciation 11,033      
Moorestown, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,143      
Initial cost of building and improvements 23,902      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,143      
Carrying amount of building and improvements 23,902      
Accumulated depreciation 6,786      
Morehead City, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 3,104      
Cost Capitalized Subsequent to Acquisition 2,039      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,143      
Accumulated depreciation 2,846      
Moulton, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,695      
Initial cost of building and improvements 12,510      
Cost Capitalized Subsequent to Acquisition 984      
Carrying amount of land and land improvements 1,596      
Carrying amount of building and improvements 13,593      
Accumulated depreciation 2,340      
Mountainside, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,097      
Initial cost of building and improvements 7,807      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,097      
Carrying amount of building and improvements 7,807      
Accumulated depreciation 1,172      
Mt. Pleasant, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,863      
Initial cost of building and improvements 6,467      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,863      
Carrying amount of building and improvements 6,467      
Accumulated depreciation 1,088      
Naples, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,222      
Initial cost of building and improvements 10,639      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,222      
Carrying amount of building and improvements 10,639      
Accumulated depreciation 1,672      
Naples, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,672      
Initial cost of building and improvements 23,119      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,672      
Carrying amount of building and improvements 23,119      
Accumulated depreciation 4,048      
Naples, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,854      
Initial cost of building and improvements 12,398      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,854      
Carrying amount of building and improvements 12,398      
Accumulated depreciation 1,755      
Nashville, TN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,910      
Initial cost of building and improvements 29,590      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,910      
Carrying amount of building and improvements 29,590      
Accumulated depreciation 12,243      
Needham, MA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,610      
Initial cost of building and improvements 12,667      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,610      
Carrying amount of building and improvements 12,667      
Accumulated depreciation 6,910      
Needham, MA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,957      
Initial cost of building and improvements 71,163      
Cost Capitalized Subsequent to Acquisition 191      
Carrying amount of land and land improvements 3,957      
Carrying amount of building and improvements 71,354      
Accumulated depreciation 4,139      
New Lenox, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,225      
Initial cost of building and improvements 21,575      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,225      
Carrying amount of building and improvements 21,575      
Accumulated depreciation 2,986      
New Moston, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,480      
Initial cost of building and improvements 4,378      
Cost Capitalized Subsequent to Acquisition 193      
Carrying amount of land and land improvements 1,529      
Carrying amount of building and improvements 4,522      
Accumulated depreciation 1,299      
New Port Richey, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,984      
Initial cost of building and improvements 15,885      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,984      
Carrying amount of building and improvements 15,885      
Accumulated depreciation 98      
Newark, DE | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 560      
Initial cost of building and improvements 21,220      
Cost Capitalized Subsequent to Acquisition 2,500      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 23,720      
Accumulated depreciation 10,939      
Newcastle Under Lyme, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,110      
Initial cost of building and improvements 5,655      
Cost Capitalized Subsequent to Acquisition 223      
Carrying amount of land and land improvements 1,147      
Carrying amount of building and improvements 5,841      
Accumulated depreciation 1,603      
Newcastle Under Lyme, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,125      
Initial cost of building and improvements 5,537      
Cost Capitalized Subsequent to Acquisition 219      
Carrying amount of land and land improvements 1,162      
Carrying amount of building and improvements 5,719      
Accumulated depreciation 1,403      
Newport News, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 839      
Initial cost of building and improvements 6,077      
Cost Capitalized Subsequent to Acquisition 6      
Carrying amount of land and land improvements 839      
Carrying amount of building and improvements 6,083      
Accumulated depreciation 2,075      
Newtownabbey, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 843      
Initial cost of building and improvements 4,143      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 843      
Carrying amount of building and improvements 4,143      
Accumulated depreciation 178      
Norman, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 55      
Initial cost of building and improvements 1,484      
Cost Capitalized Subsequent to Acquisition 132      
Carrying amount of land and land improvements 55      
Carrying amount of building and improvements 1,616      
Accumulated depreciation 1,093      
North Augusta, SC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 332      
Initial cost of building and improvements 2,558      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 332      
Carrying amount of building and improvements 2,558      
Accumulated depreciation 1,646      
North Fort Myers, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,361      
Initial cost of building and improvements 12,951      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,361      
Carrying amount of building and improvements 12,951      
Accumulated depreciation 230      
Northampton, UK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,182      
Initial cost of building and improvements 17,348      
Cost Capitalized Subsequent to Acquisition 741      
Carrying amount of land and land improvements 5,352      
Carrying amount of building and improvements 17,919      
Accumulated depreciation 5,113      
Northampton, UK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,013      
Initial cost of building and improvements 6,257      
Cost Capitalized Subsequent to Acquisition 273      
Carrying amount of land and land improvements 2,080      
Carrying amount of building and improvements 6,463      
Accumulated depreciation 1,495      
Northbrook, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,298      
Initial cost of building and improvements 13,337      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,298      
Carrying amount of building and improvements 13,337      
Accumulated depreciation 1,934      
Nottingham, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 8,151      
Carrying amount of land and land improvements 1,682      
Carrying amount of building and improvements 6,469      
Accumulated depreciation 1,482      
Nuneaton, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,325      
Initial cost of building and improvements 8,983      
Cost Capitalized Subsequent to Acquisition 404      
Carrying amount of land and land improvements 3,434      
Carrying amount of building and improvements 9,278      
Accumulated depreciation 2,548      
Nuthall, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,498      
Initial cost of building and improvements 10,436      
Cost Capitalized Subsequent to Acquisition 425      
Carrying amount of land and land improvements 2,580      
Carrying amount of building and improvements 10,779      
Accumulated depreciation 2,991      
Oak Lawn, IL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,418      
Initial cost of building and improvements 5,426      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,418      
Carrying amount of building and improvements 5,426      
Accumulated depreciation 781      
Oak Lawn, IL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,876      
Initial cost of building and improvements 7,985      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,876      
Carrying amount of building and improvements 7,985      
Accumulated depreciation 1,193      
Oakland, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,760      
Initial cost of building and improvements 16,143      
Cost Capitalized Subsequent to Acquisition 282      
Carrying amount of land and land improvements 4,760      
Carrying amount of building and improvements 16,425      
Accumulated depreciation 4,140      
Ocala, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,644      
Initial cost of building and improvements 20,388      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,644      
Carrying amount of building and improvements 20,388      
Accumulated depreciation 132      
Olathe, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,930      
Initial cost of building and improvements 19,765      
Cost Capitalized Subsequent to Acquisition 553      
Carrying amount of land and land improvements 1,930      
Carrying amount of building and improvements 20,318      
Accumulated depreciation 4,864      
Oldsmar, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,851      
Initial cost of building and improvements 15,062      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,851      
Carrying amount of building and improvements 15,062      
Accumulated depreciation 91      
Ona, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 950      
Initial cost of building and improvements 7,732      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 950      
Carrying amount of building and improvements 7,732      
Accumulated depreciation 2,548      
Orange Park, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,238      
Initial cost of building and improvements 8,424      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,238      
Carrying amount of building and improvements 8,424      
Accumulated depreciation 63      
Orem, UT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,150      
Initial cost of building and improvements 24,107      
Cost Capitalized Subsequent to Acquisition 18      
Carrying amount of land and land improvements 2,150      
Carrying amount of building and improvements 24,125      
Accumulated depreciation 5,131      
Orlando, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,880      
Initial cost of building and improvements 16,959      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,880      
Carrying amount of building and improvements 16,959      
Accumulated depreciation 237      
Orlando, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,215      
Initial cost of building and improvements 17,499      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,215      
Carrying amount of building and improvements 17,499      
Accumulated depreciation 108      
Osage City, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 50      
Initial cost of building and improvements 1,700      
Cost Capitalized Subsequent to Acquisition 151      
Carrying amount of land and land improvements 50      
Carrying amount of building and improvements 1,851      
Accumulated depreciation 512      
Osawatomie, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 130      
Initial cost of building and improvements 2,970      
Cost Capitalized Subsequent to Acquisition 145      
Carrying amount of land and land improvements 130      
Carrying amount of building and improvements 3,115      
Accumulated depreciation 782      
Ottawa, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 160      
Initial cost of building and improvements 6,590      
Cost Capitalized Subsequent to Acquisition 47      
Carrying amount of land and land improvements 160      
Carrying amount of building and improvements 6,637      
Accumulated depreciation 1,490      
Overland Park, KS 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 31,146      
Carrying amount of land and land improvements 3,730      
Carrying amount of building and improvements 27,416      
Accumulated depreciation 10,586      
Overland Park, KS 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,500      
Initial cost of building and improvements 29,105      
Cost Capitalized Subsequent to Acquisition 7,295      
Carrying amount of land and land improvements 4,500      
Carrying amount of building and improvements 36,400      
Accumulated depreciation 13,528      
Overland Park, KS 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 410      
Initial cost of building and improvements 2,840      
Cost Capitalized Subsequent to Acquisition 98      
Carrying amount of land and land improvements 410      
Carrying amount of building and improvements 2,938      
Accumulated depreciation 764      
Overland Park, KS 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,300      
Initial cost of building and improvements 25,311      
Cost Capitalized Subsequent to Acquisition 677      
Carrying amount of land and land improvements 1,300      
Carrying amount of building and improvements 25,988      
Accumulated depreciation 6,062      
Owasso, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 215      
Initial cost of building and improvements 1,380      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 215      
Carrying amount of building and improvements 1,380      
Accumulated depreciation 963      
Palm Bay, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,262      
Initial cost of building and improvements 17,158      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,262      
Carrying amount of building and improvements 17,158      
Accumulated depreciation 110      
Palm Beach Gardens, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,082      
Initial cost of building and improvements 6,622      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,082      
Carrying amount of building and improvements 6,622      
Accumulated depreciation 1,095      
Palm Coast, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,998      
Initial cost of building and improvements 14,299      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,998      
Carrying amount of building and improvements 14,299      
Accumulated depreciation 100      
Palm Desert, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 6,195      
Initial cost of building and improvements 8,918      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 6,195      
Carrying amount of building and improvements 8,918      
Accumulated depreciation 1,337      
Palm Harbor, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,306      
Initial cost of building and improvements 13,807      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,306      
Carrying amount of building and improvements 13,807      
Accumulated depreciation 2,148      
Palm Harbor, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,281      
Initial cost of building and improvements 22,450      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,281      
Carrying amount of building and improvements 22,450      
Accumulated depreciation 3,427      
Palm Harbor, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,490      
Initial cost of building and improvements 23,901      
Cost Capitalized Subsequent to Acquisition 125      
Carrying amount of land and land improvements 2,490      
Carrying amount of building and improvements 24,026      
Accumulated depreciation 2,410      
Palm Harbor, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,653      
Initial cost of building and improvements 18,567      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,653      
Carrying amount of building and improvements 18,567      
Accumulated depreciation 291      
Palm Harbor, FL 5 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,637      
Initial cost of building and improvements 12,697      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,637      
Carrying amount of building and improvements 12,697      
Accumulated depreciation 80      
Palos Heights, IL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,225      
Initial cost of building and improvements 12,453      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,225      
Carrying amount of building and improvements 12,453      
Accumulated depreciation 1,774      
Palos Heights, IL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,431      
Initial cost of building and improvements 28,803      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,431      
Carrying amount of building and improvements 28,803      
Accumulated depreciation 3,966      
Palos Heights, IL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,591      
Initial cost of building and improvements 7,647      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,593      
Carrying amount of building and improvements 7,645      
Accumulated depreciation 1,107      
Panama City Beach, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 900      
Initial cost of building and improvements 6,402      
Cost Capitalized Subsequent to Acquisition 734      
Carrying amount of land and land improvements 900      
Carrying amount of building and improvements 7,136      
Accumulated depreciation 2,105      
Paola, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 190      
Initial cost of building and improvements 5,610      
Cost Capitalized Subsequent to Acquisition 63      
Carrying amount of land and land improvements 190      
Carrying amount of building and improvements 5,673      
Accumulated depreciation 1,302      
Parma, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 960      
Initial cost of building and improvements 12,718      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 960      
Carrying amount of building and improvements 12,718      
Accumulated depreciation 1,942      
Parma, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,833      
Initial cost of building and improvements 10,314      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,833      
Carrying amount of building and improvements 10,314      
Accumulated depreciation 1,773      
Paulsboro, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,264      
Initial cost of building and improvements 8,023      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,264      
Carrying amount of building and improvements 8,023      
Accumulated depreciation 1,240      
Paw Paw, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,687      
Initial cost of building and improvements 5,602      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,687      
Carrying amount of building and improvements 5,602      
Accumulated depreciation 980      
Pensacola, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,647      
Initial cost of building and improvements 14,748      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,647      
Carrying amount of building and improvements 14,748      
Accumulated depreciation 90      
Perry, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,530      
Initial cost of building and improvements 13,141      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,530      
Carrying amount of building and improvements 13,141      
Accumulated depreciation 217      
Perrysburg, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,456      
Initial cost of building and improvements 5,431      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,456      
Carrying amount of building and improvements 5,431      
Accumulated depreciation 847      
Perrysburg, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,213      
Initial cost of building and improvements 7,108      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,213      
Carrying amount of building and improvements 7,108      
Accumulated depreciation 1,027      
Philadelphia, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,930      
Initial cost of building and improvements 10,433      
Cost Capitalized Subsequent to Acquisition 3,536      
Carrying amount of land and land improvements 2,930      
Carrying amount of building and improvements 13,969      
Accumulated depreciation 5,327      
Pickerington, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,072      
Initial cost of building and improvements 27,651      
Cost Capitalized Subsequent to Acquisition 472      
Carrying amount of land and land improvements 2,072      
Carrying amount of building and improvements 28,123      
Accumulated depreciation 2,081      
Pikesville, MD 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 2,487      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 2,487      
Accumulated depreciation 338      
Pikesville, MD 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,247      
Initial cost of building and improvements 8,379      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,247      
Carrying amount of building and improvements 8,379      
Accumulated depreciation 1,352      
Pinehurst, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 2,690      
Cost Capitalized Subsequent to Acquisition 818      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 3,508      
Accumulated depreciation 1,776      
Piqua, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 204      
Initial cost of building and improvements 1,885      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 204      
Carrying amount of building and improvements 1,885      
Accumulated depreciation 1,248      
Piscataway, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,100      
Initial cost of building and improvements 33,351      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,100      
Carrying amount of building and improvements 33,351      
Accumulated depreciation 6,147      
Pittsburgh, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 603      
Initial cost of building and improvements 11,354      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 603      
Carrying amount of building and improvements 11,354      
Accumulated depreciation 1,724      
Pittsburgh, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,005      
Initial cost of building and improvements 15,160      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,005      
Carrying amount of building and improvements 15,160      
Accumulated depreciation 2,215      
Pittsburgh, PA 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,140      
Initial cost of building and improvements 3,164      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,140      
Carrying amount of building and improvements 3,164      
Accumulated depreciation 467      
Pittsburgh, PA 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 761      
Initial cost of building and improvements 4,213      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 761      
Carrying amount of building and improvements 4,213      
Accumulated depreciation 596      
Pittsburgh, PA 5 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,480      
Initial cost of building and improvements 9,712      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,480      
Carrying amount of building and improvements 9,712      
Accumulated depreciation 1,603      
Pittsburgh, PA 6 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,139      
Initial cost of building and improvements 5,844      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,139      
Carrying amount of building and improvements 5,844      
Accumulated depreciation 944      
Pittsburgh, PA 7 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,750      
Initial cost of building and improvements 8,572      
Cost Capitalized Subsequent to Acquisition 6,344      
Carrying amount of land and land improvements 1,750      
Carrying amount of building and improvements 14,916      
Accumulated depreciation 5,143      
Plainview, NY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,990      
Initial cost of building and improvements 11,969      
Cost Capitalized Subsequent to Acquisition 2,221      
Carrying amount of land and land improvements 3,990      
Carrying amount of building and improvements 14,190      
Accumulated depreciation 5,180      
Plano, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,840      
Initial cost of building and improvements 20,152      
Cost Capitalized Subsequent to Acquisition 560      
Carrying amount of land and land improvements 1,840      
Carrying amount of building and improvements 20,712      
Accumulated depreciation 4,639      
Pompano Beach, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 774      
Initial cost of building and improvements 10,832      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 774      
Carrying amount of building and improvements 10,832      
Accumulated depreciation 60      
Poole, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,283      
Initial cost of building and improvements 16,501      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,283      
Carrying amount of building and improvements 16,501      
Accumulated depreciation 2,336      
Potomac, MD 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,448      
Initial cost of building and improvements 14,622      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,448      
Carrying amount of building and improvements 14,622      
Accumulated depreciation 2,096      
Potomac, MD 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,119      
Initial cost of building and improvements 14,916      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,119      
Carrying amount of building and improvements 14,916      
Accumulated depreciation 2,209      
Pottstown, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 984      
Initial cost of building and improvements 4,563      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 984      
Carrying amount of building and improvements 4,563      
Accumulated depreciation 726      
Powell, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,910      
Initial cost of building and improvements 18,008      
Cost Capitalized Subsequent to Acquisition 281      
Carrying amount of land and land improvements 1,910      
Carrying amount of building and improvements 18,289      
Accumulated depreciation 1,574      
Powell, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,300      
Initial cost of building and improvements 26,198      
Cost Capitalized Subsequent to Acquisition 344      
Carrying amount of land and land improvements 2,300      
Carrying amount of building and improvements 26,542      
Accumulated depreciation 1,972      
Prior Lake, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 12,498      
Initial cost of land and land improvements 1,870      
Initial cost of building and improvements 29,849      
Cost Capitalized Subsequent to Acquisition 300      
Carrying amount of land and land improvements 1,870      
Carrying amount of building and improvements 30,149      
Accumulated depreciation 6,311      
Prospect, KY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,533      
Initial cost of building and improvements 9,963      
Cost Capitalized Subsequent to Acquisition 176      
Carrying amount of land and land improvements 2,533      
Carrying amount of building and improvements 10,139      
Accumulated depreciation 1,225      
Raleigh, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 7,598      
Initial cost of building and improvements 88,870      
Cost Capitalized Subsequent to Acquisition 900      
Carrying amount of land and land improvements 7,598      
Carrying amount of building and improvements 89,770      
Accumulated depreciation 15,680      
Raleigh, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,530      
Initial cost of building and improvements 59,589      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,530      
Carrying amount of building and improvements 59,589      
Accumulated depreciation 17,696      
Raleigh, NC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,580      
Initial cost of building and improvements 16,837      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,580      
Carrying amount of building and improvements 16,837      
Accumulated depreciation 5,312      
Raleigh, NC 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 7,092      
Initial cost of building and improvements 142,300      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 7,092      
Carrying amount of building and improvements 142,300      
Accumulated depreciation 2,276      
Red Bank, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,050      
Initial cost of building and improvements 21,275      
Cost Capitalized Subsequent to Acquisition 1,560      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 22,835      
Accumulated depreciation 7,379      
Redondo Beach, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 9,557      
Cost Capitalized Subsequent to Acquisition 857      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 10,414      
Accumulated depreciation 9,998      
Reidsville, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 170      
Initial cost of building and improvements 3,830      
Cost Capitalized Subsequent to Acquisition 1,473      
Carrying amount of land and land improvements 170      
Carrying amount of building and improvements 5,303      
Accumulated depreciation 2,642      
Richardson, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,468      
Initial cost of building and improvements 12,975      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,468      
Carrying amount of building and improvements 12,975      
Accumulated depreciation 1,936      
Richmond, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 700      
Initial cost of building and improvements 14,222      
Cost Capitalized Subsequent to Acquisition 393      
Carrying amount of land and land improvements 700      
Carrying amount of building and improvements 14,615      
Accumulated depreciation 3,475      
Richmond, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,261      
Initial cost of building and improvements 17,974      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,261      
Carrying amount of building and improvements 17,974      
Accumulated depreciation 2,548      
Richmond, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,046      
Initial cost of building and improvements 8,233      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,046      
Carrying amount of building and improvements 8,233      
Accumulated depreciation 1,249      
Roanoke, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 748      
Initial cost of building and improvements 4,483      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 748      
Carrying amount of building and improvements 4,488      
Accumulated depreciation 1,846      
Rock Hill, SC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,825      
Initial cost of building and improvements 7,676      
Cost Capitalized Subsequent to Acquisition 190      
Carrying amount of land and land improvements 1,825      
Carrying amount of building and improvements 7,866      
Accumulated depreciation 1,173      
Rockford, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,386      
Initial cost of building and improvements 13,546      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,386      
Carrying amount of building and improvements 13,546      
Accumulated depreciation 1,616      
Rockville Centre, NY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,290      
Initial cost of building and improvements 20,310      
Cost Capitalized Subsequent to Acquisition 1,581      
Carrying amount of land and land improvements 4,290      
Carrying amount of building and improvements 21,891      
Accumulated depreciation 7,521      
Romeoville, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,895      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,895      
Carrying amount of building and improvements 0      
Accumulated depreciation 0      
Roseville, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,140      
Initial cost of building and improvements 24,679      
Cost Capitalized Subsequent to Acquisition 100      
Carrying amount of land and land improvements 2,140      
Carrying amount of building and improvements 24,779      
Accumulated depreciation 5,232      
Rugeley, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,900      
Initial cost of building and improvements 10,262      
Cost Capitalized Subsequent to Acquisition 400      
Carrying amount of land and land improvements 1,962      
Carrying amount of building and improvements 10,600      
Accumulated depreciation 3,083      
Ruston, LA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 710      
Initial cost of building and improvements 9,790      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 710      
Carrying amount of building and improvements 9,790      
Accumulated depreciation 3,566      
S Holland, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,423      
Initial cost of building and improvements 8,907      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,423      
Carrying amount of building and improvements 8,907      
Accumulated depreciation 1,359      
Safety Harbor, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,058      
Initial cost of building and improvements 16,100      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,058      
Carrying amount of building and improvements 16,100      
Accumulated depreciation 247      
Saint Cloud, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,200      
Initial cost of building and improvements 16,050      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,200      
Carrying amount of building and improvements 16,050      
Accumulated depreciation 99      
Salem, OR | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 450      
Initial cost of building and improvements 5,171      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 449      
Carrying amount of building and improvements 5,172      
Accumulated depreciation 3,314      
Salisbury, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 370      
Initial cost of building and improvements 5,697      
Cost Capitalized Subsequent to Acquisition 390      
Carrying amount of land and land improvements 370      
Carrying amount of building and improvements 6,087      
Accumulated depreciation 3,133      
San Angelo, TX 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 260      
Initial cost of building and improvements 8,800      
Cost Capitalized Subsequent to Acquisition 449      
Carrying amount of land and land improvements 260      
Carrying amount of building and improvements 9,249      
Accumulated depreciation 4,474      
San Angelo, TX 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,050      
Initial cost of building and improvements 24,689      
Cost Capitalized Subsequent to Acquisition 1,404      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 26,093      
Accumulated depreciation 6,455      
San Antonio, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,499      
Initial cost of building and improvements 12,658      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,499      
Carrying amount of building and improvements 12,658      
Accumulated depreciation 1,868      
San Diego, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 22,003      
Cost Capitalized Subsequent to Acquisition 1,845      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 23,848      
Accumulated depreciation 9,052      
San Juan Capistrano, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,390      
Initial cost of building and improvements 6,942      
Cost Capitalized Subsequent to Acquisition 1,542      
Carrying amount of land and land improvements 1,390      
Carrying amount of building and improvements 8,484      
Accumulated depreciation 5,014      
Sandusky, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 967      
Initial cost of building and improvements 6,738      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 967      
Carrying amount of building and improvements 6,738      
Accumulated depreciation 854      
Sarasota, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 475      
Initial cost of building and improvements 3,175      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 475      
Carrying amount of building and improvements 3,175      
Accumulated depreciation 2,286      
Sarasota, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 443      
Initial cost of building and improvements 8,892      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 443      
Carrying amount of building and improvements 8,892      
Accumulated depreciation 1,448      
Sarasota, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,101      
Initial cost of building and improvements 11,204      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,101      
Carrying amount of building and improvements 11,204      
Accumulated depreciation 2,657      
Sarasota, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,370      
Initial cost of building and improvements 4,082      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,370      
Carrying amount of building and improvements 4,082      
Accumulated depreciation 620      
Sarasota, FL 5 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,792      
Initial cost of building and improvements 11,173      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,792      
Carrying amount of building and improvements 11,173      
Accumulated depreciation 1,646      
Sarasota, FL 6 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,437      
Initial cost of building and improvements 13,982      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,437      
Carrying amount of building and improvements 13,982      
Accumulated depreciation 243      
Sarasota, FL 7 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,941      
Initial cost of building and improvements 16,193      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,941      
Carrying amount of building and improvements 16,193      
Accumulated depreciation 100      
Sarasota, FL 8 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,824      
Initial cost of building and improvements 7,088      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,824      
Carrying amount of building and improvements 7,088      
Accumulated depreciation 59      
Scranton, PA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 440      
Initial cost of building and improvements 17,609      
Cost Capitalized Subsequent to Acquisition 712      
Carrying amount of land and land improvements 440      
Carrying amount of building and improvements 18,321      
Accumulated depreciation 4,558      
Scranton, PA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 320      
Initial cost of building and improvements 12,144      
Cost Capitalized Subsequent to Acquisition 115      
Carrying amount of land and land improvements 320      
Carrying amount of building and improvements 12,259      
Accumulated depreciation 3,105      
Seminole, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,165      
Initial cost of building and improvements 8,975      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,165      
Carrying amount of building and improvements 8,975      
Accumulated depreciation 1,415      
Seminole, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,654      
Initial cost of building and improvements 14,171      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,654      
Carrying amount of building and improvements 14,171      
Accumulated depreciation 239      
Seven Fields, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 484      
Initial cost of building and improvements 4,663      
Cost Capitalized Subsequent to Acquisition 1,122      
Carrying amount of land and land improvements 484      
Carrying amount of building and improvements 5,785      
Accumulated depreciation 3,027      
Sewell, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,127      
Initial cost of building and improvements 14,090      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,127      
Carrying amount of building and improvements 14,090      
Accumulated depreciation 2,364      
Shawnee, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 80      
Initial cost of building and improvements 1,400      
Cost Capitalized Subsequent to Acquisition 2,506      
Carrying amount of land and land improvements 80      
Carrying amount of building and improvements 3,906      
Accumulated depreciation 1,002      
Silver Spring, MD 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,469      
Initial cost of building and improvements 10,392      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,469      
Carrying amount of building and improvements 10,392      
Accumulated depreciation 1,533      
Silver Spring, MD 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,678      
Initial cost of building and improvements 11,679      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,678      
Carrying amount of building and improvements 11,679      
Accumulated depreciation 1,837      
Silvis, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 880      
Initial cost of building and improvements 16,420      
Cost Capitalized Subsequent to Acquisition 139      
Carrying amount of land and land improvements 880      
Carrying amount of building and improvements 16,559      
Accumulated depreciation 5,857      
Sinking Spring, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,393      
Initial cost of building and improvements 19,842      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,393      
Carrying amount of building and improvements 19,842      
Accumulated depreciation 2,895      
Sittingbourne, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,357      
Initial cost of building and improvements 6,539      
Cost Capitalized Subsequent to Acquisition 260      
Carrying amount of land and land improvements 1,402      
Carrying amount of building and improvements 6,754      
Accumulated depreciation 1,591      
Smithfield, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 290      
Initial cost of building and improvements 5,680      
Cost Capitalized Subsequent to Acquisition 844      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 6,524      
Accumulated depreciation 3,100      
Smithfield, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 360      
Initial cost of building and improvements 8,216      
Cost Capitalized Subsequent to Acquisition 444      
Carrying amount of land and land improvements 360      
Carrying amount of building and improvements 8,660      
Accumulated depreciation 2,105      
South Bend, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 670      
Initial cost of building and improvements 17,770      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 17,770      
Accumulated depreciation 4,751      
South Daytona, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,462      
Initial cost of building and improvements 6,437      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,462      
Carrying amount of building and improvements 6,437      
Accumulated depreciation 104      
South Pasadena, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,162      
Initial cost of building and improvements 7,456      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,162      
Carrying amount of building and improvements 7,456      
Accumulated depreciation 110      
South Point, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,135      
Initial cost of building and improvements 9,387      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,135      
Carrying amount of building and improvements 9,387      
Accumulated depreciation 1,371      
Southampton, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,518      
Initial cost of building and improvements 16,027      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,518      
Carrying amount of building and improvements 16,027      
Accumulated depreciation 2,736      
Southbury, CT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,860      
Initial cost of building and improvements 23,613      
Cost Capitalized Subsequent to Acquisition 4,684      
Carrying amount of land and land improvements 1,860      
Carrying amount of building and improvements 28,297      
Accumulated depreciation 8,118      
Spokane, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,649      
Initial cost of building and improvements 11,699      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,649      
Carrying amount of building and improvements 11,699      
Accumulated depreciation 1,728      
Springfield, IL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 990      
Initial cost of building and improvements 9,475      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 9,475      
Accumulated depreciation 3,726      
St. Paul, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,100      
Initial cost of building and improvements 33,019      
Cost Capitalized Subsequent to Acquisition 100      
Carrying amount of land and land improvements 2,100      
Carrying amount of building and improvements 33,119      
Accumulated depreciation 6,932      
Stafford, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,007      
Initial cost of building and improvements 8,231      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,007      
Carrying amount of building and improvements 8,231      
Accumulated depreciation 1,624      
Stamford, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,820      
Initial cost of building and improvements 3,238      
Cost Capitalized Subsequent to Acquisition 167      
Carrying amount of land and land improvements 1,880      
Carrying amount of building and improvements 3,345      
Accumulated depreciation 840      
Statesville, NC 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 150      
Initial cost of building and improvements 1,447      
Cost Capitalized Subsequent to Acquisition 377      
Carrying amount of land and land improvements 150      
Carrying amount of building and improvements 1,824      
Accumulated depreciation 952      
Statesville, NC 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 310      
Initial cost of building and improvements 6,183      
Cost Capitalized Subsequent to Acquisition 868      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 7,051      
Accumulated depreciation 3,309      
Statesville, NC 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 140      
Initial cost of building and improvements 3,627      
Cost Capitalized Subsequent to Acquisition 89      
Carrying amount of land and land improvements 140      
Carrying amount of building and improvements 3,716      
Accumulated depreciation 1,941      
Staunton, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 899      
Initial cost of building and improvements 6,391      
Cost Capitalized Subsequent to Acquisition 6      
Carrying amount of land and land improvements 899      
Carrying amount of building and improvements 6,397      
Accumulated depreciation 2,243      
Sterling Heights, MI 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 790      
Initial cost of building and improvements 10,784      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 790      
Carrying amount of building and improvements 10,784      
Accumulated depreciation 1,603      
Sterling Heights, MI 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,583      
Initial cost of building and improvements 15,634      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,583      
Carrying amount of building and improvements 15,634      
Accumulated depreciation 2,359      
Stillwater, OK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 80      
Initial cost of building and improvements 1,400      
Cost Capitalized Subsequent to Acquisition 33      
Carrying amount of land and land improvements 80      
Carrying amount of building and improvements 1,433      
Accumulated depreciation 1,003      
Stratford-upon-Avon, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 790      
Initial cost of building and improvements 14,508      
Cost Capitalized Subsequent to Acquisition 504      
Carrying amount of land and land improvements 816      
Carrying amount of building and improvements 14,986      
Accumulated depreciation 3,364      
Stroudsburg, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 340      
Initial cost of building and improvements 16,313      
Cost Capitalized Subsequent to Acquisition 174      
Carrying amount of land and land improvements 340      
Carrying amount of building and improvements 16,487      
Accumulated depreciation 4,686      
Sunbury, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 695      
Initial cost of building and improvements 7,244      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 695      
Carrying amount of building and improvements 7,244      
Accumulated depreciation 1,034      
Sunnyvale, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,946      
Initial cost of building and improvements 22,123      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,946      
Carrying amount of building and improvements 22,123      
Accumulated depreciation 3,144      
Superior, WI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,020      
Initial cost of building and improvements 13,735      
Cost Capitalized Subsequent to Acquisition 6,159      
Carrying amount of land and land improvements 1,020      
Carrying amount of building and improvements 19,894      
Accumulated depreciation 5,659      
Tacoma, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,522      
Initial cost of building and improvements 8,573      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,522      
Carrying amount of building and improvements 8,573      
Accumulated depreciation 1,245      
Tallahassee, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,264      
Initial cost of building and improvements 9,652      
Cost Capitalized Subsequent to Acquisition 55      
Carrying amount of land and land improvements 1,264      
Carrying amount of building and improvements 9,707      
Accumulated depreciation 1,186      
Tallahassee, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,800      
Initial cost of building and improvements 14,009      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,800      
Carrying amount of building and improvements 14,009      
Accumulated depreciation 91      
Tallahassee, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,529      
Initial cost of building and improvements 22,064      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,529      
Carrying amount of building and improvements 22,064      
Accumulated depreciation 132      
Tampa, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,315      
Initial cost of building and improvements 6,911      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,315      
Carrying amount of building and improvements 6,911      
Accumulated depreciation 1,185      
Tampa, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,630      
Initial cost of building and improvements 14,085      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,630      
Carrying amount of building and improvements 14,085      
Accumulated depreciation 249      
Tampa, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,500      
Initial cost of building and improvements 20,765      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 20,765      
Accumulated depreciation 111      
Telford, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 988      
Initial cost of building and improvements 10,672      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 988      
Carrying amount of building and improvements 10,672      
Accumulated depreciation 746      
Terre Haute, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,370      
Initial cost of building and improvements 18,016      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,370      
Carrying amount of building and improvements 18,016      
Accumulated depreciation 4,577      
Texarkana, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 192      
Initial cost of building and improvements 1,403      
Cost Capitalized Subsequent to Acquisition 97      
Carrying amount of land and land improvements 192      
Carrying amount of building and improvements 1,500      
Accumulated depreciation 978      
The Villages, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,035      
Initial cost of building and improvements 7,446      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,035      
Carrying amount of building and improvements 7,446      
Accumulated depreciation 2,227      
Thomasville, GA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 530      
Initial cost of building and improvements 12,520      
Cost Capitalized Subsequent to Acquisition 1,347      
Carrying amount of land and land improvements 530      
Carrying amount of building and improvements 13,867      
Accumulated depreciation 3,864      
Thousand Oaks, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,425      
Initial cost of building and improvements 19,573      
Cost Capitalized Subsequent to Acquisition 12      
Carrying amount of land and land improvements 3,425      
Carrying amount of building and improvements 19,585      
Accumulated depreciation 2,054      
Three Rivers, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,255      
Initial cost of building and improvements 2,760      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,255      
Carrying amount of building and improvements 2,760      
Accumulated depreciation 538      
Titusville, FL | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,581      
Initial cost of building and improvements 12,751      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,581      
Carrying amount of building and improvements 12,751      
Accumulated depreciation 221      
Tomball, TX | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,050      
Initial cost of building and improvements 13,300      
Cost Capitalized Subsequent to Acquisition 1,003      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 14,303      
Accumulated depreciation 4,635      
Toms River, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,466      
Initial cost of building and improvements 23,311      
Cost Capitalized Subsequent to Acquisition 151      
Carrying amount of land and land improvements 3,466      
Carrying amount of building and improvements 23,462      
Accumulated depreciation 4,128      
Tonganoxie, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 310      
Initial cost of building and improvements 3,690      
Cost Capitalized Subsequent to Acquisition 81      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 3,771      
Accumulated depreciation 957      
Towson, MD 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,715      
Initial cost of building and improvements 13,111      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,715      
Carrying amount of building and improvements 13,111      
Accumulated depreciation 1,932      
Towson, MD 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,100      
Initial cost of building and improvements 6,465      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,100      
Carrying amount of building and improvements 6,465      
Accumulated depreciation 911      
Towson, MD 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,527      
Initial cost of building and improvements 3,126      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,527      
Carrying amount of building and improvements 3,126      
Accumulated depreciation 556      
Troy, MI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,381      
Initial cost of building and improvements 24,445      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,381      
Carrying amount of building and improvements 24,445      
Accumulated depreciation 3,446      
Troy, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 2,000      
Cost Capitalized Subsequent to Acquisition 4,254      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 6,254      
Accumulated depreciation 2,983      
Trumbull, CT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,440      
Initial cost of building and improvements 43,384      
Cost Capitalized Subsequent to Acquisition 7,269      
Carrying amount of land and land improvements 4,440      
Carrying amount of building and improvements 50,653      
Accumulated depreciation 14,610      
Tulsa, OK 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,390      
Initial cost of building and improvements 7,110      
Cost Capitalized Subsequent to Acquisition 1,275      
Carrying amount of land and land improvements 1,390      
Carrying amount of building and improvements 8,385      
Accumulated depreciation 3,302      
Tulsa, OK 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,100      
Initial cost of building and improvements 27,007      
Cost Capitalized Subsequent to Acquisition 2,278      
Carrying amount of land and land improvements 1,100      
Carrying amount of building and improvements 29,285      
Accumulated depreciation 5,739      
Tulsa, OK 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 890      
Initial cost of building and improvements 4,391      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 4,391      
Accumulated depreciation 1,631      
Tustin, CA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 840      
Initial cost of building and improvements 15,299      
Cost Capitalized Subsequent to Acquisition 659      
Carrying amount of land and land improvements 840      
Carrying amount of building and improvements 15,958      
Accumulated depreciation 5,819      
Twinsburg, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,446      
Initial cost of building and improvements 5,919      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,446      
Carrying amount of building and improvements 5,919      
Accumulated depreciation 965      
Union, KY | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 33,927      
Carrying amount of land and land improvements 2,242      
Carrying amount of building and improvements 31,685      
Accumulated depreciation 3,456      
Union, SC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,932      
Initial cost of building and improvements 2,372      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,932      
Carrying amount of building and improvements 2,372      
Accumulated depreciation 540      
Valparaiso, IN 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 112      
Initial cost of building and improvements 2,558      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 112      
Carrying amount of building and improvements 2,558      
Accumulated depreciation 1,506      
Valparaiso, IN 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 108      
Initial cost of building and improvements 2,962      
Cost Capitalized Subsequent to Acquisition 50      
Carrying amount of land and land improvements 108      
Carrying amount of building and improvements 3,012      
Accumulated depreciation 1,730      
Vancouver, WA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,503      
Initial cost of building and improvements 28,393      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,503      
Carrying amount of building and improvements 28,393      
Accumulated depreciation 3,968      
Venice, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,246      
Initial cost of building and improvements 10,094      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,246      
Carrying amount of building and improvements 10,094      
Accumulated depreciation 1,585      
Venice, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,087      
Initial cost of building and improvements 15,529      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,087      
Carrying amount of building and improvements 15,529      
Accumulated depreciation 99      
Vero Beach, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 263      
Initial cost of building and improvements 3,187      
Cost Capitalized Subsequent to Acquisition 25      
Carrying amount of land and land improvements 263      
Carrying amount of building and improvements 3,212      
Accumulated depreciation 1,854      
Vero Beach, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 297      
Initial cost of building and improvements 3,263      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 297      
Carrying amount of building and improvements 3,263      
Accumulated depreciation 1,906      
Vero Beach, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,256      
Initial cost of building and improvements 11,204      
Cost Capitalized Subsequent to Acquisition 187      
Carrying amount of land and land improvements 1,256      
Carrying amount of building and improvements 11,391      
Accumulated depreciation 1,366      
Vero Beach, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,580      
Initial cost of building and improvements 31,735      
Cost Capitalized Subsequent to Acquisition 4,732      
Carrying amount of land and land improvements 3,580      
Carrying amount of building and improvements 36,467      
Accumulated depreciation 3,296      
Virginia Beach, VA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,540      
Initial cost of building and improvements 22,593      
Cost Capitalized Subsequent to Acquisition 519      
Carrying amount of land and land improvements 1,540      
Carrying amount of building and improvements 23,112      
Accumulated depreciation 5,775      
Virginia Beach, VA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,004      
Initial cost of building and improvements 19,634      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,004      
Carrying amount of building and improvements 19,634      
Accumulated depreciation 1,521      
Voorhees, NJ 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,100      
Initial cost of building and improvements 25,950      
Cost Capitalized Subsequent to Acquisition 26      
Carrying amount of land and land improvements 3,100      
Carrying amount of building and improvements 25,976      
Accumulated depreciation 8,294      
Voorhees, NJ 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,193      
Initial cost of building and improvements 6,990      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,193      
Carrying amount of building and improvements 6,990      
Accumulated depreciation 1,142      
Wabash, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 671      
Initial cost of building and improvements 14,588      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 14,589      
Accumulated depreciation 4,040      
Waconia, MN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 890      
Initial cost of building and improvements 14,726      
Cost Capitalized Subsequent to Acquisition 4,495      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 19,221      
Accumulated depreciation 6,103      
Wake Forest, NC | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 200      
Initial cost of building and improvements 3,003      
Cost Capitalized Subsequent to Acquisition 2,625      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,628      
Accumulated depreciation 2,932      
Wallingford, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,356      
Initial cost of building and improvements 6,487      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,356      
Carrying amount of building and improvements 6,487      
Accumulated depreciation 1,080      
Walnut Creek, CA 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 4,358      
Initial cost of building and improvements 18,407      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,358      
Carrying amount of building and improvements 18,407      
Accumulated depreciation 2,683      
Walnut Creek, CA 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 5,394      
Initial cost of building and improvements 39,084      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,394      
Carrying amount of building and improvements 39,084      
Accumulated depreciation 5,417      
Walsall, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 10,067      
Carrying amount of land and land improvements 1,223      
Carrying amount of building and improvements 8,844      
Accumulated depreciation 2,103      
Wamego, KS | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 40      
Initial cost of building and improvements 2,510      
Cost Capitalized Subsequent to Acquisition 61      
Carrying amount of land and land improvements 40      
Carrying amount of building and improvements 2,571      
Accumulated depreciation 604      
Warren, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,000      
Initial cost of building and improvements 30,810      
Cost Capitalized Subsequent to Acquisition 1,605      
Carrying amount of land and land improvements 2,000      
Carrying amount of building and improvements 32,415      
Accumulated depreciation 10,484      
Waterloo, IA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 605      
Initial cost of building and improvements 3,030      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 605      
Carrying amount of building and improvements 3,030      
Accumulated depreciation 488      
Wayne, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,427      
Initial cost of building and improvements 15,674      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,427      
Carrying amount of building and improvements 15,674      
Accumulated depreciation 2,904      
Wellingborough, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,480      
Initial cost of building and improvements 5,724      
Cost Capitalized Subsequent to Acquisition 237      
Carrying amount of land and land improvements 1,529      
Carrying amount of building and improvements 5,912      
Accumulated depreciation 1,564      
West Bend, WI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 620      
Initial cost of building and improvements 17,790      
Cost Capitalized Subsequent to Acquisition 38      
Carrying amount of land and land improvements 620      
Carrying amount of building and improvements 17,828      
Accumulated depreciation 5,677      
West Des Moines, IA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 828      
Initial cost of building and improvements 5,103      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 828      
Carrying amount of building and improvements 5,103      
Accumulated depreciation 831      
West Milford, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,960      
Initial cost of building and improvements 24,614      
Cost Capitalized Subsequent to Acquisition 327      
Carrying amount of land and land improvements 1,960      
Carrying amount of building and improvements 24,941      
Accumulated depreciation 4,000      
West Orange, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,347      
Initial cost of building and improvements 19,389      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,347      
Carrying amount of building and improvements 19,389      
Accumulated depreciation 3,365      
West Palm Beach, FL 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,175      
Initial cost of building and improvements 8,294      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,175      
Carrying amount of building and improvements 8,294      
Accumulated depreciation 1,328      
West Palm Beach, FL 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,921      
Initial cost of building and improvements 5,731      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,921      
Carrying amount of building and improvements 5,731      
Accumulated depreciation 886      
West Palm Beach, FL 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,746      
Initial cost of building and improvements 17,977      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,746      
Carrying amount of building and improvements 17,977      
Accumulated depreciation 287      
West Palm Beach, FL 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,787      
Initial cost of building and improvements 14,378      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,787      
Carrying amount of building and improvements 14,378      
Accumulated depreciation 92      
West Palm Beach, FL 5 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,366      
Initial cost of building and improvements 17,908      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,366      
Carrying amount of building and improvements 17,908      
Accumulated depreciation 96      
West Reading, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 890      
Initial cost of building and improvements 12,118      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 12,118      
Accumulated depreciation 1,672      
Westerville, OH 1 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 740      
Initial cost of building and improvements 8,287      
Cost Capitalized Subsequent to Acquisition 6,657      
Carrying amount of land and land improvements 740      
Carrying amount of building and improvements 14,944      
Accumulated depreciation 11,311      
Westerville, OH 2 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 26,121      
Carrying amount of land and land improvements 2,566      
Carrying amount of building and improvements 23,555      
Accumulated depreciation 2,554      
Westerville, OH 3 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,420      
Initial cost of building and improvements 5,371      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,420      
Carrying amount of building and improvements 5,371      
Accumulated depreciation 825      
Westerville, OH 4 | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,582      
Initial cost of building and improvements 10,279      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,582      
Carrying amount of building and improvements 10,279      
Accumulated depreciation 1,605      
Westfield, IN | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 891      
Initial cost of building and improvements 15,964      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 15,965      
Accumulated depreciation 4,365      
Westlake, OH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 855      
Initial cost of building and improvements 11,963      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 855      
Carrying amount of building and improvements 11,963      
Accumulated depreciation 1,798      
Weston Super Mare, UK | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,517      
Initial cost of building and improvements 7,054      
Cost Capitalized Subsequent to Acquisition 315      
Carrying amount of land and land improvements 2,600      
Carrying amount of building and improvements 7,286      
Accumulated depreciation 2,012      
Wheaton, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,864      
Initial cost of building and improvements 3,788      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,864      
Carrying amount of building and improvements 3,788      
Accumulated depreciation 604      
Whippany, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,571      
Initial cost of building and improvements 14,977      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,571      
Carrying amount of building and improvements 14,977      
Accumulated depreciation 2,263      
Whitehall, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,645      
Initial cost of building and improvements 6,789      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,645      
Carrying amount of building and improvements 6,789      
Accumulated depreciation 1,021      
Wichita, KS 1        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 860      
Initial cost of building and improvements 8,873      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 860      
Carrying amount of building and improvements 8,873      
Accumulated depreciation 3,125      
Wichita, KS 2        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 260      
Initial cost of building and improvements 2,240      
Cost Capitalized Subsequent to Acquisition 137      
Carrying amount of land and land improvements 260      
Carrying amount of building and improvements 2,377      
Accumulated depreciation 568      
Williamsburg, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,187      
Initial cost of building and improvements 5,728      
Cost Capitalized Subsequent to Acquisition 6      
Carrying amount of land and land improvements 1,187      
Carrying amount of building and improvements 5,734      
Accumulated depreciation 2,118      
Willoughby, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,774      
Initial cost of building and improvements 8,653      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,774      
Carrying amount of building and improvements 8,653      
Accumulated depreciation 1,322      
Wilmington, DE 1        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,376      
Initial cost of building and improvements 13,450      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,376      
Carrying amount of building and improvements 13,450      
Accumulated depreciation 1,992      
Wilmington, DE 2        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,843      
Initial cost of building and improvements 36,948      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,843      
Carrying amount of building and improvements 36,948      
Accumulated depreciation 5,260      
Wilmington, DE 3        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,266      
Initial cost of building and improvements 9,500      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,266      
Carrying amount of building and improvements 9,500      
Accumulated depreciation 1,445      
Wilmington, NC 1        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 210      
Initial cost of building and improvements 2,991      
Cost Capitalized Subsequent to Acquisition 56      
Carrying amount of land and land improvements 210      
Carrying amount of building and improvements 3,047      
Accumulated depreciation 1,912      
Wilmington, NC 2        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 400      
Initial cost of building and improvements 15,355      
Cost Capitalized Subsequent to Acquisition 592      
Carrying amount of land and land improvements 400      
Carrying amount of building and improvements 15,947      
Accumulated depreciation 4,118      
Windsor, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,148      
Initial cost of building and improvements 6,514      
Cost Capitalized Subsequent to Acquisition 7      
Carrying amount of land and land improvements 1,148      
Carrying amount of building and improvements 6,521      
Accumulated depreciation 2,379      
Winston-Salem, NC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 360      
Initial cost of building and improvements 2,514      
Cost Capitalized Subsequent to Acquisition 595      
Carrying amount of land and land improvements 360      
Carrying amount of building and improvements 3,109      
Accumulated depreciation 1,622      
Winter Garden, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,110      
Initial cost of building and improvements 7,937      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,110      
Carrying amount of building and improvements 7,937      
Accumulated depreciation 2,568      
Winter Gardens, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,238      
Initial cost of building and improvements 21,486      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,238      
Carrying amount of building and improvements 21,486      
Accumulated depreciation 340      
Winter Springs, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,152      
Initial cost of building and improvements 14,822      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,152      
Carrying amount of building and improvements 14,822      
Accumulated depreciation 2,171      
Witherwack, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 944      
Initial cost of building and improvements 6,915      
Cost Capitalized Subsequent to Acquisition 258      
Carrying amount of land and land improvements 975      
Carrying amount of building and improvements 7,142      
Accumulated depreciation 1,974      
Wolverhampton, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,573      
Initial cost of building and improvements 6,678      
Cost Capitalized Subsequent to Acquisition 272      
Carrying amount of land and land improvements 1,625      
Carrying amount of building and improvements 6,898      
Accumulated depreciation 1,922      
Woodbury, MN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,317      
Initial cost of building and improvements 20,935      
Cost Capitalized Subsequent to Acquisition 298      
Carrying amount of land and land improvements 1,317      
Carrying amount of building and improvements 21,233      
Accumulated depreciation 4,116      
Woodstock, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 594      
Initial cost of building and improvements 5,108      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 594      
Carrying amount of building and improvements 5,113      
Accumulated depreciation 1,623      
Worcester, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 3,500      
Initial cost of building and improvements 54,099      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,500      
Carrying amount of building and improvements 54,099      
Accumulated depreciation 20,008      
Yardley, PA 1        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 773      
Initial cost of building and improvements 14,914      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 773      
Carrying amount of building and improvements 14,914      
Accumulated depreciation 2,310      
Yardley, PA 2        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,561      
Initial cost of building and improvements 9,439      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,561      
Carrying amount of building and improvements 9,439      
Accumulated depreciation 1,740      
York, PA 1        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 976      
Initial cost of building and improvements 9,354      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 976      
Carrying amount of building and improvements 9,354      
Accumulated depreciation 1,408      
York, PA 2        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,050      
Initial cost of building and improvements 4,210      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 4,210      
Accumulated depreciation 750      
York, PA 3        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 1,121      
Initial cost of building and improvements 7,584      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,121      
Carrying amount of building and improvements 7,584      
Accumulated depreciation 1,220      
York, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,961      
Initial cost of building and improvements 8,266      
Cost Capitalized Subsequent to Acquisition 369      
Carrying amount of land and land improvements 3,058      
Carrying amount of building and improvements 8,538      
Accumulated depreciation 2,103      
Youngsville, NC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 380      
Initial cost of building and improvements 10,689      
Cost Capitalized Subsequent to Acquisition 175      
Carrying amount of land and land improvements 380      
Carrying amount of building and improvements 10,864      
Accumulated depreciation 2,796      
Zephyrhills, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 0      
Initial cost of land and land improvements 2,131      
Initial cost of building and improvements 6,669      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,131      
Carrying amount of building and improvements 6,669      
Accumulated depreciation $ 1,128