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Schedule III - Real Estate and Accumulated Depreciation - Triple-net (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances $ 2,467,223      
Initial cost of land and land improvements 4,548,384      
Initial cost of building and improvements 37,700,252      
Cost Capitalized Subsequent to Acquisition 9,187,992      
Carrying amount of land and land improvements 5,271,418      
Carrying amount of building and improvements 46,028,087      
Accumulated depreciation 10,626,263 $ 9,274,814 $ 8,075,733 $ 6,910,114
Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 335,554      
Initial cost of land and land improvements 902,057      
Initial cost of building and improvements 6,873,404      
Cost Capitalized Subsequent to Acquisition 1,127,313      
Carrying amount of land and land improvements 986,273      
Carrying amount of building and improvements 7,881,025      
Accumulated depreciation 1,719,431      
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 12,023      
Carrying amount of land and land improvements 950      
Carrying amount of building and improvements 33,010      
Accumulated depreciation 7,768      
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 1,405      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 9,592      
Accumulated depreciation 2,605      
Akron, 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 633      
Initial cost of building and improvements 3,003      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 633      
Carrying amount of building and improvements 3,002      
Accumulated depreciation 545      
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 6,829      
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 1,197      
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 8,984      
Carrying amount of land and land improvements 600      
Carrying amount of building and improvements 15,289      
Accumulated depreciation 4,461      
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 5,027      
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 891      
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 11,849      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 494      
Carrying amount of building and improvements 11,848      
Accumulated depreciation 2,050      
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 4,823      
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 876      
Alridge, 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 964      
Initial cost of building and improvements 6,974      
Cost Capitalized Subsequent to Acquisition 1,953      
Carrying amount of land and land improvements 1,202      
Carrying amount of building and improvements 8,689      
Accumulated depreciation 2,303      
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 11,127      
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 2,078      
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 18,980      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,687      
Carrying amount of building and improvements 18,979      
Accumulated depreciation 3,213      
Ansted, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 12,521      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 25,414      
Carrying amount of land and land improvements 697      
Carrying amount of building and improvements 24,717      
Accumulated depreciation 891      
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 1,520      
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 485      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 5,517      
Accumulated depreciation 2,931      
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 284      
Carrying amount of land and land improvements 204      
Carrying amount of building and improvements 3,773      
Accumulated depreciation 2,351      
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 850      
Carrying amount of land and land improvements 280      
Carrying amount of building and improvements 2,805      
Accumulated depreciation 1,422      
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 1,432      
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 5,006      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,691      
Carrying amount of building and improvements 5,006      
Accumulated depreciation 1,154      
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 5,669      
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 7,627      
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 1,612      
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 8,014      
Carrying amount of land and land improvements 570      
Carrying amount of building and improvements 11,155      
Accumulated depreciation 5,406      
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 1,272      
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 501      
Initial cost of building and improvements 8,009      
Cost Capitalized Subsequent to Acquisition 323      
Carrying amount of land and land improvements 479      
Carrying amount of building and improvements 8,354      
Accumulated depreciation 503      
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 565      
Initial cost of building and improvements 4,724      
Cost Capitalized Subsequent to Acquisition 620      
Carrying amount of land and land improvements 540      
Carrying amount of building and improvements 5,369      
Accumulated depreciation 364      
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 4,305      
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 814      
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 3,150      
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 633      
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 1,034      
Initial cost of building and improvements 6,984      
Cost Capitalized Subsequent to Acquisition 2      
Carrying amount of land and land improvements 1,035      
Carrying amount of building and improvements 6,985      
Accumulated depreciation 532      
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 9,313      
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 1,599      
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 56      
Carrying amount of land and land improvements 100      
Carrying amount of building and improvements 1,436      
Accumulated depreciation 1,023      
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 2,620      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 633      
Carrying amount of building and improvements 2,619      
Accumulated depreciation 514      
Bedford, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 18,070      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 16,876      
Carrying amount of land and land improvements 1,103      
Carrying amount of building and improvements 15,773      
Accumulated depreciation 697      
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 1,096      
Initial cost of building and improvements 6,231      
Cost Capitalized Subsequent to Acquisition 10      
Carrying amount of land and land improvements 1,048      
Carrying amount of building and improvements 6,289      
Accumulated depreciation 500      
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 149      
Initial cost of building and improvements 6,431      
Cost Capitalized Subsequent to Acquisition 8      
Carrying amount of land and land improvements 142      
Carrying amount of building and improvements 6,446      
Accumulated depreciation 348      
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 839      
Initial cost of building and improvements 4,825      
Cost Capitalized Subsequent to Acquisition 8      
Carrying amount of land and land improvements 802      
Carrying amount of building and improvements 4,870      
Accumulated depreciation 385      
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 799      
Initial cost of building and improvements 19,659      
Cost Capitalized Subsequent to Acquisition 26      
Carrying amount of land and land improvements 763      
Carrying amount of building and improvements 19,721      
Accumulated depreciation 1,122      
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 2,148      
Carrying amount of land and land improvements 3,000      
Carrying amount of building and improvements 25,674      
Accumulated depreciation 10,912      
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 291      
Carrying amount of land and land improvements 2,001      
Carrying amount of building and improvements 26,482      
Accumulated depreciation 5,028      
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 3,034      
Carrying amount of land and land improvements 1,550      
Carrying amount of building and improvements 16,587      
Accumulated depreciation 5,361      
Berkeley, 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 3,050      
Initial cost of building and improvements 32,677      
Cost Capitalized Subsequent to Acquisition 5,232      
Carrying amount of land and land improvements 3,050      
Carrying amount of building and improvements 37,909      
Accumulated depreciation 11,655      
Bethel Park, 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 1,700      
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 6,703      
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 6,871      
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 1,164      
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 16,892      
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 2,783      
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 13,592      
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 2,252      
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 740      
Carrying amount of land and land improvements 6,000      
Carrying amount of building and improvements 14,125      
Accumulated depreciation 3,530      
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 2,987      
Initial cost of building and improvements 8,609      
Cost Capitalized Subsequent to Acquisition 3,178      
Carrying amount of land and land improvements 3,806      
Carrying amount of building and improvements 10,968      
Accumulated depreciation 2,936      
Biggleswade, 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 4,296      
Initial cost of building and improvements 15,507      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,296      
Carrying amount of building and improvements 15,507      
Accumulated depreciation 169      
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 15,676      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 781      
Carrying amount of building and improvements 15,675      
Accumulated depreciation 2,678      
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 4,627      
Bluefield, VA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 7,521      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 17,077      
Carrying amount of land and land improvements 894      
Carrying amount of building and improvements 16,183      
Accumulated depreciation 605      
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 4,976      
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 1,107      
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 4,063      
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 808      
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 21,371      
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 3,905      
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 2,548      
Initial cost of building and improvements 16,946      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,445      
Carrying amount of building and improvements 17,049      
Accumulated depreciation 2,755      
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 10,204      
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 1,907      
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 14,226      
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 2,428      
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 3,931      
Initial cost of building and improvements 10,946      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,006      
Carrying amount of building and improvements 10,871      
Accumulated depreciation 2,116      
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 44      
Carrying amount of land and land improvements 252      
Carrying amount of building and improvements 3,342      
Accumulated depreciation 2,454      
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 8      
Carrying amount of land and land improvements 2,562      
Carrying amount of building and improvements 19,725      
Accumulated depreciation 881      
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 5      
Carrying amount of land and land improvements 1,551      
Carrying amount of building and improvements 13,522      
Accumulated depreciation 606      
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 2      
Carrying amount of land and land improvements 507      
Carrying amount of building and improvements 4,426      
Accumulated depreciation 198      
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 9,972      
Cost Capitalized Subsequent to Acquisition 3,522      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 13,494      
Accumulated depreciation 3,678      
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 6      
Carrying amount of land and land improvements 2,378      
Carrying amount of building and improvements 17,420      
Accumulated depreciation 785      
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 7      
Carrying amount of land and land improvements 2,186      
Carrying amount of building and improvements 16,263      
Accumulated depreciation 724      
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 5,586      
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 1,823      
Carrying amount of land and land improvements 1,290      
Carrying amount of building and improvements 27,070      
Accumulated depreciation 9,682      
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 2,416      
Carrying amount of land and land improvements 1,800      
Carrying amount of building and improvements 34,226      
Accumulated depreciation 12,201      
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 296      
Initial cost of building and improvements 3,901      
Cost Capitalized Subsequent to Acquisition 930      
Carrying amount of land and land improvements 361      
Carrying amount of building and improvements 4,766      
Accumulated depreciation 1,307      
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 6      
Carrying amount of land and land improvements 2,281      
Carrying amount of building and improvements 18,512      
Accumulated depreciation 810      
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 5      
Carrying amount of land and land improvements 1,943      
Carrying amount of building and improvements 14,555      
Accumulated depreciation 644      
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 2,612      
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 549      
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 3,135      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 17,120      
Accumulated depreciation 5,778      
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 2,780      
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 365      
Carrying amount of land and land improvements 460      
Carrying amount of building and improvements 5,832      
Accumulated depreciation 3,075      
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 6,007      
Initial cost of building and improvements 10,909      
Cost Capitalized Subsequent to Acquisition 3,720      
Carrying amount of land and land improvements 7,325      
Carrying amount of building and improvements 13,311      
Accumulated depreciation 3,679      
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 1,845      
Initial cost of building and improvements 33,700      
Cost Capitalized Subsequent to Acquisition 7,861      
Carrying amount of land and land improvements 2,250      
Carrying amount of building and improvements 41,156      
Accumulated depreciation 10,993      
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 3,600      
Initial cost of building and improvements 55,314      
Cost Capitalized Subsequent to Acquisition 12,936      
Carrying amount of land and land improvements 4,390      
Carrying amount of building and improvements 67,460      
Accumulated depreciation 17,915      
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 4      
Carrying amount of land and land improvements 1,464      
Carrying amount of building and improvements 10,641      
Accumulated depreciation 474      
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 3,597      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 517      
Carrying amount of building and improvements 3,596      
Accumulated depreciation 635      
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 348      
Carrying amount of land and land improvements 300      
Carrying amount of building and improvements 2,446      
Accumulated depreciation 1,437      
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 16,971      
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 2,890      
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 1,945      
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 5      
Carrying amount of land and land improvements 1,802      
Carrying amount of building and improvements 14,472      
Accumulated depreciation 642      
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 8,207      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 978      
Carrying amount of building and improvements 8,204      
Accumulated depreciation 1,487      
Carmel, 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 1,700      
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 5,275      
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 266      
Carrying amount of land and land improvements 2,010      
Carrying amount of building and improvements 19,815      
Accumulated depreciation 4,410      
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 2,012      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 6,362      
Accumulated depreciation 3,644      
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 4,593      
Cedar Grove, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 6,220      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 26,519      
Carrying amount of land and land improvements 1,671      
Carrying amount of building and improvements 24,848      
Accumulated depreciation 732      
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 1,564      
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 3,960      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 920      
Carrying amount of building and improvements 3,958      
Accumulated depreciation 1,025      
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 10,841      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 832      
Carrying amount of building and improvements 10,837      
Accumulated depreciation 1,933      
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 8,864      
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 1,662      
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 1,663      
Carrying amount of land and land improvements 354      
Carrying amount of building and improvements 4,309      
Accumulated depreciation 2,134      
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 4,138      
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 9,874      
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 1,833      
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 5,305      
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 8,688      
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 1,518      
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 91      
Carrying amount of land and land improvements 85      
Carrying amount of building and improvements 1,486      
Accumulated depreciation 1,030      
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 8,997      
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 1,561      
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 14,014      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 912      
Carrying amount of building and improvements 14,013      
Accumulated depreciation 2,470      
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 31,725      
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 5,260      
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 27      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 2,319      
Accumulated depreciation 1,540      
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 4,354      
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 3      
Carrying amount of land and land improvements 1,149      
Carrying amount of building and improvements 7,765      
Accumulated depreciation 416      
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 2,128      
Initial cost of building and improvements 12,695      
Cost Capitalized Subsequent to Acquisition 5,235      
Carrying amount of land and land improvements 2,880      
Carrying amount of building and improvements 17,178      
Accumulated depreciation 4,680      
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 281      
Carrying amount of land and land improvements 3,881      
Carrying amount of building and improvements 35,222      
Accumulated depreciation 4,306      
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 7,161      
Initial cost of building and improvements 18,247      
Cost Capitalized Subsequent to Acquisition 9,907      
Carrying amount of land and land improvements 9,953      
Carrying amount of building and improvements 25,362      
Accumulated depreciation 7,572      
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 14,927      
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 6,710      
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 1,536      
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 2,320      
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 449      
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 741      
Carrying amount of land and land improvements 550      
Carrying amount of building and improvements 4,662      
Accumulated depreciation 2,429      
Concord, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 12,408      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 12,657      
Carrying amount of land and land improvements 476      
Carrying amount of building and improvements 12,181      
Accumulated depreciation 469      
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 1,622      
Initial cost of building and improvements 4,079      
Cost Capitalized Subsequent to Acquisition 1,561      
Carrying amount of land and land improvements 2,066      
Carrying amount of building and improvements 5,196      
Accumulated depreciation 1,394      
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 526      
Initial cost of building and improvements 3,621      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 503      
Carrying amount of building and improvements 3,649      
Accumulated depreciation 271      
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 340      
Initial cost of building and improvements 2,344      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 325      
Carrying amount of building and improvements 2,364      
Accumulated depreciation 176      
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 1,264      
Initial cost of building and improvements 5,293      
Cost Capitalized Subsequent to Acquisition 89      
Carrying amount of land and land improvements 1,136      
Carrying amount of building and improvements 5,510      
Accumulated depreciation 1,139      
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 1,130      
Carrying amount of land and land improvements 2,050      
Carrying amount of building and improvements 21,099      
Accumulated depreciation 8,941      
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 5,490      
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 6      
Carrying amount of land and land improvements 2,139      
Carrying amount of building and improvements 17,287      
Accumulated depreciation 753      
Cumberland, RI | Triple-net        
SEC Schedule, 12-28, 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 5,324      
Carrying amount of land and land improvements 1,696      
Carrying amount of building and improvements 3,628      
Accumulated depreciation 237      
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 16,802      
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 2,965      
Danbury, 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 3,751      
Initial cost of building and improvements 14,990      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,751      
Carrying amount of building and improvements 14,990      
Accumulated depreciation 357      
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 2,683      
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 2,699      
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 1,029      
Carrying amount of land and land improvements 2,880      
Carrying amount of building and improvements 9,699      
Accumulated depreciation 3,242      
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 686      
Carrying amount of land and land improvements 566      
Carrying amount of building and improvements 2,703      
Accumulated depreciation 393      
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 20,043      
Cost Capitalized Subsequent to Acquisition 1,012      
Carrying amount of land and land improvements 910      
Carrying amount of building and improvements 21,055      
Accumulated depreciation 3,487      
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 5,414      
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 1,019      
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 3,396      
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 703      
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 13,800      
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 2,265      
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 13,576      
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 2,410      
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 11,844      
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 2,163      
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 882      
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 24,811      
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 4,091      
Downend, 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 20,964      
Carrying amount of land and land improvements 4,016      
Carrying amount of building and improvements 16,948      
Accumulated depreciation 5,026      
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 15,010      
Carrying amount of land and land improvements 3,569      
Carrying amount of building and improvements 11,441      
Accumulated depreciation 1,409      
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 2,912      
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 625      
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 1,492      
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 13,329      
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 2,246      
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 4      
Carrying amount of land and land improvements 1,151      
Carrying amount of building and improvements 8,982      
Accumulated depreciation 412      
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 1      
Carrying amount of land and land improvements 445      
Carrying amount of building and improvements 1,276      
Accumulated depreciation 92      
Dunmurry, Belfast, 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 1,042      
Initial cost of building and improvements 5,933      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 996      
Carrying amount of building and improvements 5,979      
Accumulated depreciation 475      
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 3,721      
Carrying amount of land and land improvements 1,476      
Carrying amount of building and improvements 14,380      
Accumulated depreciation 13,081      
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 1,511      
Carrying amount of land and land improvements 1,380      
Carrying amount of building and improvements 35,740      
Accumulated depreciation 12,481      
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 3,053      
Initial cost of building and improvements 18,328      
Cost Capitalized Subsequent to Acquisition 7,551      
Carrying amount of land and land improvements 4,132      
Carrying amount of building and improvements 24,800      
Accumulated depreciation 6,670      
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 7,502      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,109      
Carrying amount of building and improvements 7,502      
Accumulated depreciation 1,722      
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 13,400      
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 2,375      
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 10,052      
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 2,104      
Eatontown, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 17,735      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 36,464      
Carrying amount of land and land improvements 5,102      
Carrying amount of building and improvements 31,362      
Accumulated depreciation 2,132      
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 2,791      
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 3,990      
Carrying amount of land and land improvements 1,810      
Carrying amount of building and improvements 18,839      
Accumulated depreciation 5,045      
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 1,740      
Carrying amount of land and land improvements 1,650      
Carrying amount of building and improvements 26,907      
Accumulated depreciation 5,719      
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 2,998      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,758      
Accumulated depreciation 3,085      
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 7,076      
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 1,312      
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 18,751      
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 3,076      
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 2,250      
Carrying amount of land and land improvements 1,460      
Carrying amount of building and improvements 9,971      
Accumulated depreciation 6,536      
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 6      
Carrying amount of land and land improvements 1,832      
Carrying amount of building and improvements 14,857      
Accumulated depreciation 652      
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 1,393      
Carrying amount of land and land improvements 1,520      
Carrying amount of building and improvements 25,417      
Accumulated depreciation 10,393      
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 1,166      
Carrying amount of land and land improvements 1,400      
Carrying amount of building and improvements 6,642      
Accumulated depreciation 3,628      
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 5,737      
Fair Lawn, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 11,648      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 31,542      
Carrying amount of land and land improvements 3,771      
Carrying amount of building and improvements 27,771      
Accumulated depreciation 1,152      
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 17,309      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,827      
Carrying amount of building and improvements 17,308      
Accumulated depreciation 3,096      
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 3,083      
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 460      
Carrying amount of land and land improvements 570      
Carrying amount of building and improvements 9,579      
Accumulated depreciation 3,198      
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 6,977      
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 2,473      
Carrying amount of land and land improvements 2,850      
Carrying amount of building and improvements 57,648      
Accumulated depreciation 19,763      
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 10,459      
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 1,908      
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 1,622      
Initial cost of building and improvements 4,570      
Cost Capitalized Subsequent to Acquisition 1,696      
Carrying amount of land and land improvements 2,066      
Carrying amount of building and improvements 5,822      
Accumulated depreciation 1,518      
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 32,951      
Cost Capitalized Subsequent to Acquisition 2,970      
Carrying amount of land and land improvements 2,150      
Carrying amount of building and improvements 20,590      
Accumulated depreciation 6,683      
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 542      
Carrying amount of land and land improvements 410      
Carrying amount of building and improvements 4,504      
Accumulated depreciation 2,617      
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 585      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 2,385      
Accumulated depreciation 1,341      
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 1,864      
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 18,056      
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 3,000      
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 1,768      
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 1,551      
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 2,591      
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 14,027      
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 331      
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 1,110      
Initial cost of building and improvements 10,562      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,110      
Carrying amount of building and improvements 10,562      
Accumulated depreciation 1,895      
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 2,139      
Initial cost of building and improvements 18,240      
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 3,200      
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 2,502      
Initial cost of building and improvements 9,744      
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 2,068      
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 2,205      
Initial cost of building and improvements 15,100      
Cost Capitalized Subsequent to Acquisition 6      
Carrying amount of land and land improvements 2,205      
Carrying amount of building and improvements 15,106      
Accumulated depreciation 725      
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 992      
Fort Worth, 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 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 7,511      
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 9,379      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,259      
Carrying amount of building and improvements 9,376      
Accumulated depreciation 1,636      
Franklin, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 11,148      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 11,351      
Carrying amount of land and land improvements 1,699      
Carrying amount of building and improvements 9,652      
Accumulated depreciation 457      
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 2,249      
Carrying amount of land and land improvements 1,000      
Carrying amount of building and improvements 22,249      
Accumulated depreciation 10,633      
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 19,813      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 29,332      
Carrying amount of land and land improvements 1,854      
Carrying amount of building and improvements 27,478      
Accumulated depreciation 1,099      
Fredericksburg, VA 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 1,130      
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 6,732      
Gainesville, 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 2,109      
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 687      
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 3,841      
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 682      
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 794      
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 308      
Carrying amount of land and land improvements 470      
Carrying amount of building and improvements 6,437      
Accumulated depreciation 3,447      
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 168      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 3,264      
Accumulated depreciation 1,802      
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 883      
Carrying amount of land and land improvements 400      
Carrying amount of building and improvements 5,912      
Accumulated depreciation 2,992      
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 16,198      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,502      
Carrying amount of building and improvements 16,197      
Accumulated depreciation 2,832      
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 688      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 2,788      
Accumulated depreciation 1,510      
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 980      
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 6,636      
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 1,290      
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 1,152      
Carrying amount of land and land improvements 2,550      
Carrying amount of building and improvements 4,092      
Accumulated depreciation 1,591      
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 1,005      
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 779      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 3,749      
Accumulated depreciation 2,017      
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 2,497      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 8,004      
Accumulated depreciation 3,921      
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 2,696      
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 8,774      
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 1,575      
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 435      
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 384      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 4,777      
Accumulated depreciation 2,562      
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 2,386      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 867      
Carrying amount of building and improvements 2,385      
Accumulated depreciation 449      
Hamden, 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 5,084      
Initial cost of building and improvements 20,607      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,084      
Carrying amount of building and improvements 20,607      
Accumulated depreciation 487      
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 246      
Carrying amount of land and land improvements 440      
Carrying amount of building and improvements 4,715      
Accumulated depreciation 2,664      
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 1,009      
Initial cost of building and improvements 7,177      
Cost Capitalized Subsequent to Acquisition 3,191      
Carrying amount of land and land improvements 1,402      
Carrying amount of building and improvements 9,975      
Accumulated depreciation 3,009      
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 12,826      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 569      
Carrying amount of building and improvements 12,822      
Accumulated depreciation 2,231      
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 5,896      
Initial cost of building and improvements 6,585      
Cost Capitalized Subsequent to Acquisition 3,419      
Carrying amount of land and land improvements 7,512      
Carrying amount of building and improvements 8,388      
Accumulated depreciation 2,339      
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 10,766      
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 7,611      
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 1,805      
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 2,135      
Initial cost of building and improvements 5,496      
Cost Capitalized Subsequent to Acquisition 2,974      
Carrying amount of land and land improvements 2,967      
Carrying amount of building and improvements 7,638      
Accumulated depreciation 2,321      
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 2,205      
Headingley, 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 1,665      
Initial cost of building and improvements 11,168      
Cost Capitalized Subsequent to Acquisition 2,605      
Carrying amount of land and land improvements 2,003      
Carrying amount of building and improvements 13,435      
Accumulated depreciation 3,378      
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 8,414      
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 1,520      
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 656      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 10,599      
Accumulated depreciation 3,550      
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 1,387      
Initial cost of building and improvements 17,782      
Cost Capitalized Subsequent to Acquisition 8,175      
Carrying amount of land and land improvements 1,928      
Carrying amount of building and improvements 25,416      
Accumulated depreciation 8,111      
Heswall, 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 2,471      
Initial cost of building and improvements 12,212      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,471      
Carrying amount of building and improvements 12,212      
Accumulated depreciation 128      
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 1,120      
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 442      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 1,429      
Accumulated depreciation 818      
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 1,652      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 6,095      
Accumulated depreciation 3,072      
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 1,624      
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 217      
Carrying amount of land and land improvements 330      
Carrying amount of building and improvements 3,612      
Accumulated depreciation 1,953      
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 1,277      
Carrying amount of land and land improvements 430      
Carrying amount of building and improvements 5,420      
Accumulated depreciation 2,516      
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 6,341      
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 1,556      
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 1,576      
Initial cost of building and improvements 3,062      
Cost Capitalized Subsequent to Acquisition 1,809      
Carrying amount of land and land improvements 2,191      
Carrying amount of building and improvements 4,256      
Accumulated depreciation 1,418      
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 24,287      
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 4,011      
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 1,836      
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 7,652      
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 1,293      
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 3,730      
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 939      
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 2,803      
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 4,479      
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 12,480      
Carrying amount of land and land improvements 6,500      
Carrying amount of building and improvements 38,885      
Accumulated depreciation 9,117      
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 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 818      
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 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 782      
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 13,618      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,265      
Carrying amount of building and improvements 13,617      
Accumulated depreciation 3,461      
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 8,107      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 600      
Carrying amount of building and improvements 8,104      
Accumulated depreciation 1,320      
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 5,169      
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 49      
Carrying amount of land and land improvements 1,778      
Carrying amount of building and improvements 22,671      
Accumulated depreciation 4,948      
Keene, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 13,051      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 12,858      
Carrying amount of land and land improvements 717      
Carrying amount of building and improvements 12,141      
Accumulated depreciation 545      
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 18,626      
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 3,137      
Kents Hill, 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 1,487      
Initial cost of building and improvements 15,194      
Cost Capitalized Subsequent to Acquisition 4,102      
Carrying amount of land and land improvements 1,853      
Carrying amount of building and improvements 18,930      
Accumulated depreciation 4,884      
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 11,043      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 821      
Carrying amount of building and improvements 11,042      
Accumulated depreciation 1,922      
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 4,703      
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 931      
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 14,780      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 720      
Carrying amount of building and improvements 14,779      
Accumulated depreciation 2,667      
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 1,008      
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 10,598      
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 1,921      
Kingswood, 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 14,437      
Carrying amount of land and land improvements 2,142      
Carrying amount of building and improvements 12,295      
Accumulated depreciation 2,245      
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 1,779      
Initial cost of building and improvements 6,874      
Cost Capitalized Subsequent to Acquisition 3,374      
Carrying amount of land and land improvements 2,473      
Carrying amount of building and improvements 9,554      
Accumulated depreciation 2,890      
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 16,253      
Accumulated depreciation 773      
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 249      
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 4,848      
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 18,180      
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 3,106      
Laconia, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 14,478      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,871      
Carrying amount of land and land improvements 716      
Carrying amount of building and improvements 15,155      
Accumulated depreciation 635      
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 5,434      
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 16,833      
Cost Capitalized Subsequent to Acquisition 1      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 16,834      
Accumulated depreciation 4,867      
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 5      
Carrying amount of land and land improvements 2,041      
Carrying amount of building and improvements 15,433      
Accumulated depreciation 668      
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 14,809      
Accumulated depreciation 858      
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 7,618      
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 7,995      
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 3,954      
Carrying amount of land and land improvements 289      
Carrying amount of building and improvements 6,031      
Accumulated depreciation 708      
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 7,504      
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 1,327      
Lancaster, NH | Triple-net        
SEC Schedule, 12-28, 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 13,761      
Carrying amount of land and land improvements 856      
Carrying amount of building and improvements 12,905      
Accumulated depreciation 609      
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 3,427      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,166      
Carrying amount of building and improvements 3,427      
Accumulated depreciation 783      
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 1,142      
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 14,424      
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 2,463      
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 10,370      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 728      
Carrying amount of building and improvements 10,367      
Accumulated depreciation 1,938      
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 1,250      
Lebanon, NH | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 15,240      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 14,365      
Carrying amount of land and land improvements 1,687      
Carrying amount of building and improvements 12,678      
Accumulated depreciation 556      
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 5      
Carrying amount of land and land improvements 1,817      
Carrying amount of building and improvements 14,778      
Accumulated depreciation 644      
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 11,147      
Lenexa, 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 579      
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 996      
Carrying amount of land and land improvements 190      
Carrying amount of building and improvements 4,744      
Accumulated depreciation 2,511      
Letchworth Garden City, 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 3,197      
Initial cost of building and improvements 12,917      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,197      
Carrying amount of building and improvements 12,917      
Accumulated depreciation 69      
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 957      
Initial cost of building and improvements 2,167      
Cost Capitalized Subsequent to Acquisition 693      
Carrying amount of land and land improvements 1,166      
Carrying amount of building and improvements 2,651      
Accumulated depreciation 866      
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 1,176      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,076      
Accumulated depreciation 2,849      
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 11,550      
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 1,935      
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 1,126      
Initial cost of building and improvements 24,700      
Cost Capitalized Subsequent to Acquisition 6,350      
Carrying amount of land and land improvements 1,402      
Carrying amount of building and improvements 30,774      
Accumulated depreciation 7,709      
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 5,263      
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 4,566      
Littleover, 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 1,923      
Initial cost of building and improvements 6,959      
Cost Capitalized Subsequent to Acquisition 1,816      
Carrying amount of land and land improvements 2,316      
Carrying amount of building and improvements 8,382      
Accumulated depreciation 1,974      
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 385      
Carrying amount of land and land improvements 4,100      
Carrying amount of building and improvements 25,381      
Accumulated depreciation 6,484      
Livingston, 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 2,581      
Initial cost of building and improvements 17,244      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,581      
Carrying amount of building and improvements 17,244      
Accumulated depreciation 184      
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 13,558      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 985      
Carrying amount of building and improvements 13,558      
Accumulated depreciation 2,444      
Longbridge Deverill, 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 3,975      
Initial cost of building and improvements 14,144      
Cost Capitalized Subsequent to Acquisition 500      
Carrying amount of land and land improvements 3,975      
Carrying amount of building and improvements 14,644      
Accumulated depreciation 80      
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 2,455      
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 1,330      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 12,760      
Accumulated depreciation 5,502      
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 1,090      
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 6,543      
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 1,000      
Initial cost of building and improvements 11,440      
Cost Capitalized Subsequent to Acquisition 5,589      
Carrying amount of land and land improvements 1,390      
Carrying amount of building and improvements 16,639      
Accumulated depreciation 4,950      
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 7,937      
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 4,826      
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 3,697      
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 646      
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 2,308      
Initial cost of building and improvements 5,634      
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 998      
Manahawkin, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 14,657      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 36,565      
Carrying amount of land and land improvements 1,634      
Carrying amount of building and improvements 34,931      
Accumulated depreciation 1,293      
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 1,891      
Carrying amount of land and land improvements 900      
Carrying amount of building and improvements 24,515      
Accumulated depreciation 8,402      
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 4,339      
Margate, 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 3,473      
Initial cost of building and improvements 16,674      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,473      
Carrying amount of building and improvements 16,674      
Accumulated depreciation 90      
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 9,376      
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 1,624      
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 12,233      
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 2,073      
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 3,448      
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 12,750      
Cost Capitalized Subsequent to Acquisition 1,137      
Carrying amount of land and land improvements 720      
Carrying amount of building and improvements 9,604      
Accumulated depreciation 3,604      
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 9,190      
Cost Capitalized Subsequent to Acquisition 824      
Carrying amount of land and land improvements 990      
Carrying amount of building and improvements 7,600      
Accumulated depreciation 4,604      
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 3,842      
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 2,132      
Initial cost of building and improvements 5,434      
Cost Capitalized Subsequent to Acquisition 2,075      
Carrying amount of land and land improvements 2,717      
Carrying amount of building and improvements 6,924      
Accumulated depreciation 1,885      
Marmet, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 20,170      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 38,673      
Carrying amount of land and land improvements 1,495      
Carrying amount of building and improvements 37,178      
Accumulated depreciation 1,357      
Martinsburg, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 8,806      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 30,236      
Carrying amount of land and land improvements 640      
Carrying amount of building and improvements 29,596      
Accumulated depreciation 1,057      
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 3,428      
Carrying amount of land and land improvements 408      
Carrying amount of building and improvements 4,286      
Accumulated depreciation 589      
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 874      
Carrying amount of land and land improvements 560      
Carrying amount of building and improvements 5,612      
Accumulated depreciation 2,836      
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 6,857      
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 734      
Initial cost of building and improvements 4,386      
Cost Capitalized Subsequent to Acquisition 1,133      
Carrying amount of land and land improvements 896      
Carrying amount of building and improvements 5,357      
Accumulated depreciation 1,495      
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 9,941      
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 1,745      
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 768      
Miamisburg, 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 786      
Initial cost of building and improvements 3,233      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 786      
Carrying amount of building and improvements 3,232      
Accumulated depreciation 800      
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 879      
Carrying amount of land and land improvements 420      
Carrying amount of building and improvements 4,885      
Accumulated depreciation 2,612      
Middletown, RI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 7,923      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 9,040      
Carrying amount of land and land improvements 3,402      
Carrying amount of building and improvements 5,638      
Accumulated depreciation 382      
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 1,342      
Milford, DE | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 15,926      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 10,849      
Carrying amount of land and land improvements 813      
Carrying amount of building and improvements 10,036      
Accumulated depreciation 421      
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 16,113      
Cost Capitalized Subsequent to Acquisition 1,816      
Carrying amount of land and land improvements 740      
Carrying amount of building and improvements 12,514      
Accumulated depreciation 4,320      
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 18,677      
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 3,063      
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 1,055      
Carrying amount of land and land improvements 470      
Carrying amount of building and improvements 4,736      
Accumulated depreciation 2,505      
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 1,239      
Carrying amount of land and land improvements 310      
Carrying amount of building and improvements 6,038      
Accumulated depreciation 3,164      
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 550      
Carrying amount of land and land improvements 450      
Carrying amount of building and improvements 4,571      
Accumulated depreciation 2,396      
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 2,699      
Carrying amount of land and land improvements 3,250      
Carrying amount of building and improvements 30,470      
Accumulated depreciation 7,063      
Monroeville, 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 1,216      
Initial cost of building and improvements 12,753      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,216      
Carrying amount of building and improvements 12,753      
Accumulated depreciation 2,660      
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 9,827      
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 1,813      
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 3,371      
Carrying amount of land and land improvements 3,500      
Carrying amount of building and improvements 34,373      
Accumulated depreciation 12,047      
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 7,499      
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 2,183      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,287      
Accumulated depreciation 3,000      
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 1,744      
Initial cost of building and improvements 12,872      
Cost Capitalized Subsequent to Acquisition 307      
Carrying amount of land and land improvements 1,568      
Carrying amount of building and improvements 13,355      
Accumulated depreciation 2,634      
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 7,810      
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 1,388      
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 10,642      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,222      
Carrying amount of building and improvements 10,641      
Accumulated depreciation 1,980      
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 4,793      
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 12,402      
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 2,078      
Naples, 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 444      
Initial cost of building and improvements 6,973      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 444      
Carrying amount of building and improvements 6,973      
Accumulated depreciation 56      
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 7,226      
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 6,211      
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 45      
Carrying amount of land and land improvements 1,225      
Carrying amount of building and improvements 21,620      
Accumulated depreciation 3,629      
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 1,081      
Initial cost of building and improvements 3,197      
Cost Capitalized Subsequent to Acquisition 1,667      
Carrying amount of land and land improvements 1,502      
Carrying amount of building and improvements 4,443      
Accumulated depreciation 1,400      
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 7      
Carrying amount of land and land improvements 1,984      
Carrying amount of building and improvements 15,892      
Accumulated depreciation 687      
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 11,528      
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 810      
Initial cost of building and improvements 4,129      
Cost Capitalized Subsequent to Acquisition 1,927      
Carrying amount of land and land improvements 1,127      
Carrying amount of building and improvements 5,739      
Accumulated depreciation 1,727      
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 896      
Initial cost of building and improvements 4,411      
Cost Capitalized Subsequent to Acquisition 1,454      
Carrying amount of land and land improvements 1,142      
Carrying amount of building and improvements 5,619      
Accumulated depreciation 1,530      
Newport, VT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 2,343      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 8,840      
Carrying amount of land and land improvements 463      
Carrying amount of building and improvements 8,377      
Accumulated depreciation 358      
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 2,412      
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 866      
Initial cost of building and improvements 4,026      
Cost Capitalized Subsequent to Acquisition 6      
Carrying amount of land and land improvements 828      
Carrying amount of building and improvements 4,070      
Accumulated depreciation 350      
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 377      
Carrying amount of land and land improvements 55      
Carrying amount of building and improvements 1,861      
Accumulated depreciation 1,151      
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 125      
Carrying amount of land and land improvements 332      
Carrying amount of building and improvements 2,683      
Accumulated depreciation 1,711      
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 784      
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 3,784      
Initial cost of building and improvements 12,667      
Cost Capitalized Subsequent to Acquisition 6,413      
Carrying amount of land and land improvements 5,258      
Carrying amount of building and improvements 17,606      
Accumulated depreciation 5,508      
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 1,569      
Initial cost of building and improvements 4,875      
Cost Capitalized Subsequent to Acquisition 1,949      
Carrying amount of land and land improvements 2,043      
Carrying amount of building and improvements 6,350      
Accumulated depreciation 1,627      
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 13,341      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,298      
Carrying amount of building and improvements 13,340      
Accumulated depreciation 2,290      
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 2,428      
Initial cost of building and improvements 6,559      
Cost Capitalized Subsequent to Acquisition 3,503      
Carrying amount of land and land improvements 3,374      
Carrying amount of building and improvements 9,116      
Accumulated depreciation 2,744      
Nuthall, 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 1,824      
Initial cost of building and improvements 7,620      
Cost Capitalized Subsequent to Acquisition 3,682      
Carrying amount of land and land improvements 2,535      
Carrying amount of building and improvements 10,591      
Accumulated depreciation 3,222      
Nuthall, 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 1,286      
Initial cost of building and improvements 4,949      
Cost Capitalized Subsequent to Acquisition 1,774      
Carrying amount of land and land improvements 1,653      
Carrying amount of building and improvements 6,356      
Accumulated depreciation 1,615      
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 5,428      
Cost Capitalized Subsequent to Acquisition 713      
Carrying amount of land and land improvements 2,418      
Carrying amount of building and improvements 6,141      
Accumulated depreciation 951      
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 7,988      
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 1,413      
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 515      
Carrying amount of land and land improvements 4,760      
Carrying amount of building and improvements 16,658      
Accumulated depreciation 4,608      
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 7      
Carrying amount of land and land improvements 2,644      
Carrying amount of building and improvements 20,395      
Accumulated depreciation 924      
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 5,488      
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 7      
Carrying amount of land and land improvements 1,851      
Carrying amount of building and improvements 15,069      
Accumulated depreciation 640      
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 7,460      
Cost Capitalized Subsequent to Acquisition 272      
Carrying amount of land and land improvements 950      
Carrying amount of building and improvements 7,732      
Accumulated depreciation 2,776      
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 3      
Carrying amount of land and land improvements 1,238      
Carrying amount of building and improvements 8,427      
Accumulated depreciation 440      
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 0      
Carrying amount of land and land improvements 2,150      
Carrying amount of building and improvements 24,107      
Accumulated depreciation 5,754      
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 809      
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 6      
Carrying amount of land and land improvements 2,215      
Carrying amount of building and improvements 17,505      
Accumulated depreciation 759      
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 579      
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 886      
Oswestry, 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 2,650      
Initial cost of building and improvements 11,836      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,650      
Carrying amount of building and improvements 11,836      
Accumulated depreciation 236      
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 1,678      
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 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 864      
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 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 6,832      
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 299      
Carrying amount of land and land improvements 215      
Carrying amount of building and improvements 1,679      
Accumulated depreciation 1,006      
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 6      
Carrying amount of land and land improvements 2,262      
Carrying amount of building and improvements 17,164      
Accumulated depreciation 768      
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 6,624      
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 1,296      
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 5      
Carrying amount of land and land improvements 1,998      
Carrying amount of building and improvements 14,304      
Accumulated depreciation 700      
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 1,583      
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 13,811      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,306      
Carrying amount of building and improvements 13,810      
Accumulated depreciation 2,543      
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 22,457      
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 4,058      
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 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 990      
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 1,637      
Initial cost of building and improvements 12,697      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 1,637      
Carrying amount of building and improvements 12,702      
Accumulated depreciation 562      
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 12,457      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,225      
Carrying amount of building and improvements 12,457      
Accumulated depreciation 2,101      
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 28,812      
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 4,696      
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 2,590      
Initial cost of building and improvements 7,647      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 2,590      
Carrying amount of building and improvements 7,644      
Accumulated depreciation 1,295      
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 806      
Carrying amount of land and land improvements 900      
Carrying amount of building and improvements 7,208      
Accumulated depreciation 2,288      
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 1,467      
Parkersburg, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 19,803      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 39,779      
Carrying amount of land and land improvements 629      
Carrying amount of building and improvements 39,150      
Accumulated depreciation 1,390      
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 12,722      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 960      
Carrying amount of building and improvements 12,721      
Accumulated depreciation 2,300      
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 10,318      
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 2,099      
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 8,026      
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 1,468      
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 5      
Carrying amount of land and land improvements 1,647      
Carrying amount of building and improvements 14,753      
Accumulated depreciation 627      
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 740      
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 5,433      
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 1,003      
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 7,110      
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 1,216      
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 5,655      
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 2,488      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 2,487      
Accumulated depreciation 400      
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 8,383      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,247      
Carrying amount of building and improvements 8,382      
Accumulated depreciation 1,601      
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 885      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 3,575      
Accumulated depreciation 1,882      
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 87      
Carrying amount of land and land improvements 204      
Carrying amount of building and improvements 1,972      
Accumulated depreciation 1,295      
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 7,092      
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 11,357      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 603      
Carrying amount of building and improvements 11,357      
Accumulated depreciation 2,041      
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 1,140      
Initial cost of building and improvements 3,166      
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 552      
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 1,750      
Initial cost of building and improvements 8,572      
Cost Capitalized Subsequent to Acquisition 6,506      
Carrying amount of land and land improvements 1,750      
Carrying amount of building and improvements 15,078      
Accumulated depreciation 5,513      
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 2,438      
Carrying amount of land and land improvements 3,990      
Carrying amount of building and improvements 14,407      
Accumulated depreciation 5,643      
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 5,253      
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 4      
Carrying amount of land and land improvements 774      
Carrying amount of building and improvements 10,836      
Accumulated depreciation 422      
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 3,363      
Initial cost of building and improvements 16,183      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 3,226      
Carrying amount of building and improvements 16,320      
Accumulated depreciation 2,849      
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 14,626      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,448      
Carrying amount of building and improvements 14,625      
Accumulated depreciation 2,482      
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 14,921      
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 2,616      
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 4,565      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 984      
Carrying amount of building and improvements 4,563      
Accumulated depreciation 859      
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 18,030      
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 19,235      
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 5,754      
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 29      
Carrying amount of land and land improvements 7,092      
Carrying amount of building and improvements 142,329      
Accumulated depreciation 6,184      
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 1,826      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 23,101      
Accumulated depreciation 8,037      
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 880      
Carrying amount of land and land improvements 0      
Carrying amount of building and improvements 10,437      
Accumulated depreciation 10,121      
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 1,603      
Carrying amount of land and land improvements 170      
Carrying amount of building and improvements 5,433      
Accumulated depreciation 2,819      
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 12,979      
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 2,292      
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 3,920      
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 17,980      
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 3,017      
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 8,235      
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 1,479      
Ridgewood, NJ | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 4,238      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,068      
Carrying amount of land and land improvements 2,037      
Carrying amount of building and improvements 13,031      
Accumulated depreciation 541      
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 2,132      
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 1,704      
Carrying amount of land and land improvements 4,290      
Carrying amount of building and improvements 22,014      
Accumulated depreciation 8,126      
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      
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 1,387      
Initial cost of building and improvements 7,493      
Cost Capitalized Subsequent to Acquisition 3,462      
Carrying amount of land and land improvements 1,928      
Carrying amount of building and improvements 10,414      
Accumulated depreciation 3,321      
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 7,282      
Accumulated depreciation 3,792      
Rutland, VT | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 17,740      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,772      
Carrying amount of land and land improvements 690      
Carrying amount of building and improvements 15,082      
Accumulated depreciation 636      
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 8,910      
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 1,609      
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 841      
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 6      
Carrying amount of land and land improvements 2,200      
Carrying amount of building and improvements 16,056      
Accumulated depreciation 695      
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 449      
Initial cost of building and improvements 5,171      
Cost Capitalized Subsequent to Acquisition 98      
Carrying amount of land and land improvements 449      
Carrying amount of building and improvements 5,269      
Accumulated depreciation 3,439      
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 3,294      
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 549      
Carrying amount of land and land improvements 260      
Carrying amount of building and improvements 9,349      
Accumulated depreciation 4,706      
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 1,811      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 26,500      
Accumulated depreciation 7,224      
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 12,662      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 1,499      
Carrying amount of building and improvements 12,661      
Accumulated depreciation 2,211      
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 9,650      
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 1,699      
Carrying amount of land and land improvements 1,390      
Carrying amount of building and improvements 8,641      
Accumulated depreciation 5,411      
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 2,360      
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 2      
Carrying amount of land and land improvements 443      
Carrying amount of building and improvements 8,894      
Accumulated depreciation 1,715      
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 11,208      
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 3,146      
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 4,084      
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 734      
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 1,949      
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 827      
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 6      
Carrying amount of land and land improvements 1,941      
Carrying amount of building and improvements 16,199      
Accumulated depreciation 704      
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 3      
Carrying amount of land and land improvements 1,824      
Carrying amount of building and improvements 7,091      
Accumulated depreciation 416      
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 5,125      
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 3,430      
Seaford, DE | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 12,047      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 8,438      
Carrying amount of land and land improvements 839      
Carrying amount of building and improvements 7,599      
Accumulated depreciation 351      
Selsey, 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 20,743      
Carrying amount of land and land improvements 4,469      
Carrying amount of building and improvements 16,274      
Accumulated depreciation 89      
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 8,977      
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 1,675      
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 814      
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 3,259      
Carrying amount of land and land improvements 484      
Carrying amount of building and improvements 7,922      
Accumulated depreciation 3,156      
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 14,095      
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 2,799      
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 1,338      
Shepherdstown, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 11,733      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 30,637      
Carrying amount of land and land improvements 917      
Carrying amount of building and improvements 29,720      
Accumulated depreciation 1,068      
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 1,815      
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 11,683      
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 2,175      
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 19,848      
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 3,428      
Sissonville, WV | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 20,508      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 39,880      
Carrying amount of land and land improvements 433      
Carrying amount of building and improvements 39,447      
Accumulated depreciation 1,433      
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 1,081      
Initial cost of building and improvements 5,209      
Cost Capitalized Subsequent to Acquisition 1,723      
Carrying amount of land and land improvements 1,377      
Carrying amount of building and improvements 6,636      
Accumulated depreciation 1,735      
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 986      
Carrying amount of land and land improvements 290      
Carrying amount of building and improvements 6,666      
Accumulated depreciation 3,323      
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 2,359      
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 5,265      
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 354      
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 376      
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 9,390      
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 1,624      
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 1,452      
Initial cost of building and improvements 15,338      
Cost Capitalized Subsequent to Acquisition 507      
Carrying amount of land and land improvements 1,491      
Carrying amount of building and improvements 15,806      
Accumulated depreciation 3,102      
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 6,365      
Carrying amount of land and land improvements 1,860      
Carrying amount of building and improvements 29,978      
Accumulated depreciation 8,726      
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 11,703      
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 2,046      
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 1,933      
Initial cost of building and improvements 7,925      
Cost Capitalized Subsequent to Acquisition 201      
Carrying amount of land and land improvements 1,972      
Carrying amount of building and improvements 8,087      
Accumulated depreciation 1,813      
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 1,450      
Initial cost of building and improvements 2,579      
Cost Capitalized Subsequent to Acquisition 1,105      
Carrying amount of land and land improvements 1,847      
Carrying amount of building and improvements 3,287      
Accumulated depreciation 917      
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 440      
Carrying amount of land and land improvements 150      
Carrying amount of building and improvements 1,887      
Accumulated depreciation 1,003      
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 3,548      
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 146      
Carrying amount of land and land improvements 140      
Carrying amount of building and improvements 3,773      
Accumulated depreciation 2,038      
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 2,610      
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 10,787      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 790      
Carrying amount of building and improvements 10,784      
Accumulated depreciation 1,897      
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 15,639      
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 2,794      
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 77      
Carrying amount of land and land improvements 80      
Carrying amount of building and improvements 1,477      
Accumulated depreciation 1,042      
Stoneygate, 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 2,234      
Initial cost of building and improvements 17,823      
Cost Capitalized Subsequent to Acquisition 7,820      
Carrying amount of land and land improvements 3,105      
Carrying amount of building and improvements 24,772      
Accumulated depreciation 7,764      
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 643      
Initial cost of building and improvements 11,817      
Cost Capitalized Subsequent to Acquisition 3,065      
Carrying amount of land and land improvements 801      
Carrying amount of building and improvements 14,724      
Accumulated depreciation 3,684      
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 5,180      
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 7,246      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 695      
Carrying amount of building and improvements 7,244      
Accumulated depreciation 1,224      
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 3,722      
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 8,576      
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 1,474      
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 1,800      
Initial cost of building and improvements 14,009      
Cost Capitalized Subsequent to Acquisition 5      
Carrying amount of land and land improvements 1,800      
Carrying amount of building and improvements 14,014      
Accumulated depreciation 634      
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 2,529      
Initial cost of building and improvements 22,064      
Cost Capitalized Subsequent to Acquisition 8      
Carrying amount of land and land improvements 2,529      
Carrying amount of building and improvements 22,072      
Accumulated depreciation 924      
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 6,913      
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 1,403      
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 848      
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 8      
Carrying amount of land and land improvements 1,500      
Carrying amount of building and improvements 20,773      
Accumulated depreciation 781      
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 964      
Initial cost of building and improvements 10,353      
Cost Capitalized Subsequent to Acquisition 139      
Carrying amount of land and land improvements 971      
Carrying amount of building and improvements 10,485      
Accumulated depreciation 1,071      
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 5,108      
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 345      
Carrying amount of land and land improvements 192      
Carrying amount of building and improvements 1,748      
Accumulated depreciation 1,031      
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 2,453      
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 1,378      
Carrying amount of land and land improvements 530      
Carrying amount of building and improvements 13,898      
Accumulated depreciation 4,221      
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 2,763      
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 1,258      
Initial cost of building and improvements 2,761      
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 637      
Tile Cross, 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 1,296      
Initial cost of building and improvements 15,551      
Cost Capitalized Subsequent to Acquisition 4,143      
Carrying amount of land and land improvements 1,615      
Carrying amount of building and improvements 19,375      
Accumulated depreciation 4,820      
Tile Cross, 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 964      
Initial cost of building and improvements 8,214      
Cost Capitalized Subsequent to Acquisition 2,258      
Carrying amount of land and land improvements 1,202      
Carrying amount of building and improvements 10,234      
Accumulated depreciation 2,566      
Tile Hill, 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 1,598      
Initial cost of building and improvements 11,265      
Cost Capitalized Subsequent to Acquisition 3,163      
Carrying amount of land and land improvements 1,991      
Carrying amount of building and improvements 14,035      
Accumulated depreciation 3,652      
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 754      
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 1,367      
Carrying amount of land and land improvements 1,050      
Carrying amount of building and improvements 14,667      
Accumulated depreciation 5,022      
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 599      
Carrying amount of land and land improvements 3,466      
Carrying amount of building and improvements 23,910      
Accumulated depreciation 4,999      
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 1,079      
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 13,115      
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 2,288      
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 6,468      
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 1,079      
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 3,128      
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 659      
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 24,452      
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 4,081      
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 4,350      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 6,350      
Accumulated depreciation 3,133      
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 8,260      
Carrying amount of land and land improvements 4,440      
Carrying amount of building and improvements 51,644      
Accumulated depreciation 15,684      
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 1,314      
Carrying amount of land and land improvements 1,390      
Carrying amount of building and improvements 8,424      
Accumulated depreciation 3,545      
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 2,351      
Carrying amount of land and land improvements 1,100      
Carrying amount of building and improvements 29,358      
Accumulated depreciation 6,477      
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 9,410      
Cost Capitalized Subsequent to Acquisition 98      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 4,484      
Accumulated depreciation 1,761      
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 700      
Carrying amount of land and land improvements 840      
Carrying amount of building and improvements 15,999      
Accumulated depreciation 6,279      
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 5,921      
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 1,143      
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 2,374      
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 639      
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 99      
Carrying amount of land and land improvements 112      
Carrying amount of building and improvements 2,657      
Accumulated depreciation 1,569      
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 260      
Carrying amount of land and land improvements 108      
Carrying amount of building and improvements 3,222      
Accumulated depreciation 1,812      
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 28,401      
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 4,698      
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 10,097      
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 1,876      
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 5      
Carrying amount of land and land improvements 2,087      
Carrying amount of building and improvements 15,534      
Accumulated depreciation 695      
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 1,933      
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 1,983      
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 6,409      
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 2,151      
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 9,061      
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 6,992      
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 1,352      
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 670      
Initial cost of building and improvements 14,588      
Cost Capitalized Subsequent to Acquisition 1      
Carrying amount of land and land improvements 670      
Carrying amount of building and improvements 14,589      
Accumulated depreciation 4,438      
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 2,725      
Carrying amount of land and land improvements 200      
Carrying amount of building and improvements 5,728      
Accumulated depreciation 3,134      
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 6,489      
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 1,278      
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 18,413      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,358      
Carrying amount of building and improvements 18,408      
Accumulated depreciation 3,177      
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 39,096      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 5,394      
Carrying amount of building and improvements 39,085      
Accumulated depreciation 6,414      
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 684      
Warren, 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 2,000      
Initial cost of building and improvements 30,810      
Cost Capitalized Subsequent to Acquisition 1,845      
Carrying amount of land and land improvements 2,000      
Carrying amount of building and improvements 32,655      
Accumulated depreciation 11,366      
Warren, 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 2,000      
Initial cost of building and improvements 14,943      
Cost Capitalized Subsequent to Acquisition 56      
Carrying amount of land and land improvements 2,000      
Carrying amount of building and improvements 14,999      
Accumulated depreciation 335      
Warwick, RI | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 14,658      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 17,880      
Carrying amount of land and land improvements 2,374      
Carrying amount of building and improvements 15,506      
Accumulated depreciation 741      
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 3,031      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 605      
Carrying amount of building and improvements 3,030      
Accumulated depreciation 578      
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 3,439      
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 1,222      
Initial cost of building and improvements 4,726      
Cost Capitalized Subsequent to Acquisition 1,363      
Carrying amount of land and land improvements 1,502      
Carrying amount of building and improvements 5,809      
Accumulated depreciation 1,708      
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 5,104      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 828      
Carrying amount of building and improvements 5,103      
Accumulated depreciation 984      
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 1,014      
Carrying amount of land and land improvements 1,960      
Carrying amount of building and improvements 25,628      
Accumulated depreciation 4,866      
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 3,984      
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 8,297      
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 1,573      
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 5,733      
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 1,049      
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 978      
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 5      
Carrying amount of land and land improvements 1,787      
Carrying amount of building and improvements 14,383      
Accumulated depreciation 646      
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 7      
Carrying amount of land and land improvements 1,366      
Carrying amount of building and improvements 17,915      
Accumulated depreciation 676      
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 12,122      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 12,118      
Accumulated depreciation 1,980      
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 7,312      
Carrying amount of land and land improvements 740      
Carrying amount of building and improvements 15,599      
Accumulated depreciation 11,663      
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 3,345      
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 5,373      
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 977      
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 10,282      
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 1,901      
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 890      
Initial cost of building and improvements 15,964      
Cost Capitalized Subsequent to Acquisition 1      
Carrying amount of land and land improvements 890      
Carrying amount of building and improvements 15,965      
Accumulated depreciation 4,793      
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 11,966      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 855      
Carrying amount of building and improvements 11,963      
Accumulated depreciation 2,129      
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 1,838      
Initial cost of building and improvements 5,151      
Cost Capitalized Subsequent to Acquisition 2,724      
Carrying amount of land and land improvements 2,554      
Carrying amount of building and improvements 7,159      
Accumulated depreciation 2,167      
Wheaton, 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 3,864      
Initial cost of building and improvements 3,790      
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 715      
Whippany, 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 1,571      
Initial cost of building and improvements 14,982      
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 2,680      
Wichita, 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 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 3,340      
Wichita, 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 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 644      
Williamsburg, 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 1,187      
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 2,470      
Willoughby, 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 1,774      
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 1,566      
Wilmington, DE 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 1,376      
Initial cost of building and improvements 13,454      
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 2,358      
Wilmington, DE 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 2,843      
Initial cost of building and improvements 36,959      
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 6,228      
Wilmington, DE 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 2,266      
Initial cost of building and improvements 9,503      
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 1,710      
Wilmington, 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 210      
Initial cost of building and improvements 2,991      
Cost Capitalized Subsequent to Acquisition 232      
Carrying amount of land and land improvements 210      
Carrying amount of building and improvements 3,223      
Accumulated depreciation 1,993      
Wilmington, 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 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 4,581      
Windsor, 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 1,148      
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 2,771      
Winson Green, 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 1,342      
Initial cost of building and improvements 12,098      
Cost Capitalized Subsequent to Acquisition 3,305      
Carrying amount of land and land improvements 1,671      
Carrying amount of building and improvements 15,074      
Accumulated depreciation 3,805      
Winson Green, 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 1,191      
Initial cost of building and improvements 7,376      
Cost Capitalized Subsequent to Acquisition 2,107      
Carrying amount of land and land improvements 1,484      
Carrying amount of building and improvements 9,190      
Accumulated depreciation 2,356      
Winston-Salem, 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 360      
Initial cost of building and improvements 2,514      
Cost Capitalized Subsequent to Acquisition 676      
Carrying amount of land and land improvements 360      
Carrying amount of building and improvements 3,190      
Accumulated depreciation 1,707      
Winter Garden, 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 1,110      
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 2,807      
Winter Gardens, 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 3,238      
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 1,158      
Winter 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 1,152      
Initial cost of building and improvements 14,826      
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 2,570      
Witherwack, 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 689      
Initial cost of building and improvements 5,049      
Cost Capitalized Subsequent to Acquisition 2,237      
Carrying amount of land and land improvements 958      
Carrying amount of building and improvements 7,017      
Accumulated depreciation 2,126      
Wolverhampton, 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 1,149      
Initial cost of building and improvements 4,876      
Cost Capitalized Subsequent to Acquisition 2,348      
Carrying amount of land and land improvements 1,596      
Carrying amount of building and improvements 6,777      
Accumulated depreciation 2,071      
Woodstock, 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 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 1,882      
Worcester, 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 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 21,324      
Wyncote, PA | Triple-net        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial cost of encumbrances 5,149      
Initial cost of land and land improvements 0      
Initial cost of building and improvements 0      
Cost Capitalized Subsequent to Acquisition 15,871      
Carrying amount of land and land improvements 1,115      
Carrying amount of building and improvements 14,756      
Accumulated depreciation 602      
Yardley, 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 773      
Initial cost of building and improvements 14,918      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 773      
Carrying amount of building and improvements 14,914      
Accumulated depreciation 2,735      
Yardley, 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 1,561      
Initial cost of building and improvements 9,442      
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 2,060      
Yarnton, 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 4,659      
Initial cost of building and improvements 16,964      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 4,659      
Carrying amount of building and improvements 16,964      
Accumulated depreciation 92      
York, 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 976      
Initial cost of building and improvements 9,357      
Cost Capitalized Subsequent to Acquisition 0      
Carrying amount of land and land improvements 976      
Carrying amount of building and improvements 9,354      
Accumulated depreciation 1,667      
York, 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 1,050      
Initial cost of building and improvements 4,212      
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 888      
York, 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 1,121      
Initial cost of building and improvements 7,586      
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 1,445      
York, 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 2,359      
Initial cost of building and improvements 6,585      
Cost Capitalized Subsequent to Acquisition 2,449      
Carrying amount of land and land improvements 3,005      
Carrying amount of building and improvements 8,388      
Accumulated depreciation 2,294      
Youngsville, 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 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 3,096      
Zephyrhills, 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 2,131      
Initial cost of building and improvements 6,671      
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 $ 1,335