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Schedule III - Real Estate and Accumulated Depreciation (Seniors Housing) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,378,073      
Initial Cost of Land 3,142,850      
Initial Cost of Building & Improvements 26,915,633      
Cost Capitalized Subsequent to Acquisition 3,649,943      
Carrying Amount of Land 3,440,650      
Carrying Amount of Building and Improvements 30,229,356      
Accumulated Depreciation 6,104,297 $ 5,715,459 $ 5,499,958 $ 4,838,370
Seniors Housing Operating        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,706,192      
Initial Cost of Land 1,466,472      
Initial Cost of Building & Improvements 13,489,025      
Cost Capitalized Subsequent to Acquisition 2,648,613      
Carrying Amount of Land 1,642,393      
Carrying Amount of Building and Improvements 15,961,717      
Accumulated Depreciation 3,554,697      
Seniors Housing Operating | Adderbury, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,144      
Initial Cost of Building & Improvements 12,549      
Cost Capitalized Subsequent to Acquisition 1,178      
Carrying Amount of Land 2,296      
Carrying Amount of Building and Improvements 13,575      
Accumulated Depreciation 1,478      
Seniors Housing Operating | Albertville, AL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 170      
Initial Cost of Building & Improvements 6,203      
Cost Capitalized Subsequent to Acquisition 1,079      
Carrying Amount of Land 176      
Carrying Amount of Building and Improvements 7,276      
Accumulated Depreciation 2,233      
Seniors Housing Operating | Alexandria, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,280      
Initial Cost of Building & Improvements 50,914      
Cost Capitalized Subsequent to Acquisition 411      
Carrying Amount of Land 8,280      
Carrying Amount of Building and Improvements 51,325      
Accumulated Depreciation 3,881      
Seniors Housing Operating | Altrincham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,244      
Initial Cost of Building & Improvements 25,187      
Cost Capitalized Subsequent to Acquisition 4,252      
Carrying Amount of Land 4,700      
Carrying Amount of Building and Improvements 28,983      
Accumulated Depreciation 7,942      
Seniors Housing Operating | Amherst, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,136      
Initial Cost of Building & Improvements 10,522      
Cost Capitalized Subsequent to Acquisition 806      
Carrying Amount of Land 1,136      
Carrying Amount of Building and Improvements 11,328      
Accumulated Depreciation 1,371      
Seniors Housing Operating | Amherstview, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 473      
Initial Cost of Building & Improvements 4,446      
Cost Capitalized Subsequent to Acquisition 804      
Carrying Amount of Land 527      
Carrying Amount of Building and Improvements 5,196      
Accumulated Depreciation 1,213      
Seniors Housing Operating | Anderson, SC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 710      
Initial Cost of Building & Improvements 6,290      
Cost Capitalized Subsequent to Acquisition 1,159      
Carrying Amount of Land 710      
Carrying Amount of Building and Improvements 7,449      
Accumulated Depreciation 4,147      
Seniors Housing Operating | Ankeny, IA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,129      
Initial Cost of Building & Improvements 10,270      
Cost Capitalized Subsequent to Acquisition 116      
Carrying Amount of Land 1,146      
Carrying Amount of Building and Improvements 10,369      
Accumulated Depreciation 1,241      
Seniors Housing Operating | Apple Valley, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Building & Improvements 16,639      
Cost Capitalized Subsequent to Acquisition 1,893      
Carrying Amount of Land 486      
Carrying Amount of Building and Improvements 18,526      
Accumulated Depreciation 5,658      
Seniors Housing Operating | Arlington, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,660      
Initial Cost of Building & Improvements 37,395      
Cost Capitalized Subsequent to Acquisition 3,860      
Carrying Amount of Land 1,660      
Carrying Amount of Building and Improvements 41,255      
Accumulated Depreciation 12,160      
Seniors Housing Operating | Arlington, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,385      
Initial Cost of Building & Improvements 31,198      
Cost Capitalized Subsequent to Acquisition 15,809      
Carrying Amount of Land 8,393      
Carrying Amount of Building and Improvements 46,999      
Accumulated Depreciation 18,499      
Seniors Housing Operating | Arlington, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 2,338      
Cost Capitalized Subsequent to Acquisition 1,742      
Carrying Amount of Land 76      
Carrying Amount of Building and Improvements 4,004      
Accumulated Depreciation 550      
Seniors Housing Operating | Arnprior, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 788      
Initial Cost of Building & Improvements 6,283      
Cost Capitalized Subsequent to Acquisition 1,098      
Carrying Amount of Land 863      
Carrying Amount of Building and Improvements 7,306      
Accumulated Depreciation 2,015      
Seniors Housing Operating | Atlanta, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,058      
Initial Cost of Building & Improvements 14,914      
Cost Capitalized Subsequent to Acquisition 3,825      
Carrying Amount of Land 2,080      
Carrying Amount of Building and Improvements 18,717      
Accumulated Depreciation 12,682      
Seniors Housing Operating | Atlanta, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,100      
Initial Cost of Building & Improvements 20,603      
Cost Capitalized Subsequent to Acquisition 1,872      
Carrying Amount of Land 2,206      
Carrying Amount of Building and Improvements 22,369      
Accumulated Depreciation 5,546      
Seniors Housing Operating | Austin, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 880      
Initial Cost of Building & Improvements 9,520      
Cost Capitalized Subsequent to Acquisition 2,717      
Carrying Amount of Land 885      
Carrying Amount of Building and Improvements 12,232      
Accumulated Depreciation 6,580      
Seniors Housing Operating | Austin, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,560      
Initial Cost of Building & Improvements 21,413      
Cost Capitalized Subsequent to Acquisition 853      
Carrying Amount of Land 1,574      
Carrying Amount of Building and Improvements 22,252      
Accumulated Depreciation 4,204      
Seniors Housing Operating | Austin, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,200      
Initial Cost of Building & Improvements 74,850      
Cost Capitalized Subsequent to Acquisition 1,744      
Carrying Amount of Land 4,200      
Carrying Amount of Building and Improvements 76,594      
Accumulated Depreciation 12,324      
Seniors Housing Operating | Bagshot, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,960      
Initial Cost of Building & Improvements 29,881      
Cost Capitalized Subsequent to Acquisition 8,525      
Carrying Amount of Land 5,499      
Carrying Amount of Building and Improvements 37,867      
Accumulated Depreciation 10,118      
Seniors Housing Operating | Ballston Spa, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,532      
Initial Cost of Building & Improvements 17,823      
Cost Capitalized Subsequent to Acquisition 173      
Carrying Amount of Land 5,532      
Carrying Amount of Building and Improvements 17,996      
Accumulated Depreciation 62      
Seniors Housing Operating | Banstead, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,695      
Initial Cost of Building & Improvements 55,113      
Cost Capitalized Subsequent to Acquisition 13,868      
Carrying Amount of Land 7,468      
Carrying Amount of Building and Improvements 68,208      
Accumulated Depreciation 17,976      
Seniors Housing Operating | Basingstoke, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,420      
Initial Cost of Building & Improvements 18,853      
Cost Capitalized Subsequent to Acquisition 2,820      
Carrying Amount of Land 3,787      
Carrying Amount of Building and Improvements 21,306      
Accumulated Depreciation 3,945      
Seniors Housing Operating | Basking Ridge, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,356      
Initial Cost of Building & Improvements 37,710      
Cost Capitalized Subsequent to Acquisition 1,776      
Carrying Amount of Land 2,395      
Carrying Amount of Building and Improvements 39,447      
Accumulated Depreciation 10,183      
Seniors Housing Operating | Bassett, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,874      
Initial Cost of Building & Improvements 32,304      
Cost Capitalized Subsequent to Acquisition 10,899      
Carrying Amount of Land 5,411      
Carrying Amount of Building and Improvements 42,666      
Accumulated Depreciation 12,448      
Seniors Housing Operating | Bath, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,696      
Initial Cost of Building & Improvements 11,876      
Cost Capitalized Subsequent to Acquisition 1,321      
Carrying Amount of Land 2,888      
Carrying Amount of Building and Improvements 13,005      
Accumulated Depreciation 1,413      
Seniors Housing Operating | Baton Rouge, LA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,930      
Initial Cost of Land 790      
Initial Cost of Building & Improvements 29,436      
Cost Capitalized Subsequent to Acquisition 1,366      
Carrying Amount of Land 886      
Carrying Amount of Building and Improvements 30,706      
Accumulated Depreciation 7,788      
Seniors Housing Operating | Beaconsfield, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,566      
Initial Cost of Building & Improvements 50,952      
Cost Capitalized Subsequent to Acquisition 6,670      
Carrying Amount of Land 6,175      
Carrying Amount of Building and Improvements 57,013      
Accumulated Depreciation 14,248      
Seniors Housing Operating | Beaconsfield, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,149      
Initial Cost of Building & Improvements 17,484      
Cost Capitalized Subsequent to Acquisition 2,113      
Carrying Amount of Land 1,310      
Carrying Amount of Building and Improvements 19,436      
Accumulated Depreciation 6,210      
Seniors Housing Operating | Beavercreek, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 981      
Initial Cost of Building & Improvements 11,187      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 981      
Carrying Amount of Building and Improvements 11,187      
Accumulated Depreciation 345      
Seniors Housing Operating | Bee Cave, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,820      
Initial Cost of Building & Improvements 21,084      
Cost Capitalized Subsequent to Acquisition 727      
Carrying Amount of Land 1,832      
Carrying Amount of Building and Improvements 21,799      
Accumulated Depreciation 3,286      
Seniors Housing Operating | Bellevue, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,800      
Initial Cost of Building & Improvements 19,004      
Cost Capitalized Subsequent to Acquisition 2,734      
Carrying Amount of Land 2,816      
Carrying Amount of Building and Improvements 21,722      
Accumulated Depreciation 6,821      
Seniors Housing Operating | Bellingham, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Building & Improvements 19,861      
Cost Capitalized Subsequent to Acquisition 1,920      
Carrying Amount of Land 1,507      
Carrying Amount of Building and Improvements 21,774      
Accumulated Depreciation 6,629      
Seniors Housing Operating | Bellingham, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 18,529      
Carrying Amount of Land 1,290      
Carrying Amount of Building and Improvements 17,239      
Accumulated Depreciation 6      
Seniors Housing Operating | Belmont, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 35,300      
Cost Capitalized Subsequent to Acquisition 2,576      
Carrying Amount of Land 178      
Carrying Amount of Building and Improvements 37,698      
Accumulated Depreciation 10,196      
Seniors Housing Operating | Bethel Park, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,626      
Initial Cost of Building & Improvements 12,947      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,626      
Carrying Amount of Building and Improvements 12,947      
Accumulated Depreciation 775      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 45,309      
Cost Capitalized Subsequent to Acquisition 1,395      
Carrying Amount of Land 3      
Carrying Amount of Building and Improvements 46,701      
Accumulated Depreciation 11,970      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 69,551      
Carrying Amount of Land 3,513      
Carrying Amount of Building and Improvements 66,038      
Accumulated Depreciation 3,225      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 45      
Cost Capitalized Subsequent to Acquisition 893      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 938      
Accumulated Depreciation 351      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 212      
Cost Capitalized Subsequent to Acquisition 926      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 1,138      
Accumulated Depreciation 642      
Seniors Housing Operating | Birmingham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4      
Initial Cost of Building & Improvements 19,646      
Cost Capitalized Subsequent to Acquisition 148      
Carrying Amount of Land 152      
Carrying Amount of Building and Improvements 19,646      
Accumulated Depreciation 5,292      
Seniors Housing Operating | Birmingham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,480      
Initial Cost of Building & Improvements 13,014      
Cost Capitalized Subsequent to Acquisition 1,799      
Carrying Amount of Land 1,639      
Carrying Amount of Building and Improvements 14,654      
Accumulated Depreciation 1,668      
Seniors Housing Operating | Birmingham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,807      
Initial Cost of Building & Improvements 11,313      
Cost Capitalized Subsequent to Acquisition 2,156      
Carrying Amount of Land 3,108      
Carrying Amount of Building and Improvements 13,168      
Accumulated Depreciation 1,466      
Seniors Housing Operating | Blainville, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,077      
Initial Cost of Building & Improvements 8,902      
Cost Capitalized Subsequent to Acquisition 1,648      
Carrying Amount of Land 2,340      
Carrying Amount of Building and Improvements 10,287      
Accumulated Depreciation 3,589      
Seniors Housing Operating | Bloomfield Hills, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,000      
Initial Cost of Building & Improvements 35,662      
Cost Capitalized Subsequent to Acquisition 1,437      
Carrying Amount of Land 2,133      
Carrying Amount of Building and Improvements 36,966      
Accumulated Depreciation 9,457      
Seniors Housing Operating | Boca Raton, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 32,270      
Initial Cost of Land 6,565      
Initial Cost of Building & Improvements 111,247      
Cost Capitalized Subsequent to Acquisition 26,328      
Carrying Amount of Land 6,991      
Carrying Amount of Building and Improvements 137,149      
Accumulated Depreciation 28,424      
Seniors Housing Operating | Boise, ID        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,220      
Initial Cost of Building & Improvements 18,881      
Cost Capitalized Subsequent to Acquisition 1,830      
Carrying Amount of Land 2,220      
Carrying Amount of Building and Improvements 20,711      
Accumulated Depreciation 2,419      
Seniors Housing Operating | Borehamwood, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,367      
Initial Cost of Building & Improvements 41,937      
Cost Capitalized Subsequent to Acquisition 6,100      
Carrying Amount of Land 5,983      
Carrying Amount of Building and Improvements 47,421      
Accumulated Depreciation 12,648      
Seniors Housing Operating | Bothell, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,350      
Initial Cost of Building & Improvements 13,439      
Cost Capitalized Subsequent to Acquisition 6,986      
Carrying Amount of Land 1,827      
Carrying Amount of Building and Improvements 19,948      
Accumulated Depreciation 4,434      
Seniors Housing Operating | Boulder, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,994      
Initial Cost of Building & Improvements 27,458      
Cost Capitalized Subsequent to Acquisition 2,490      
Carrying Amount of Land 3,064      
Carrying Amount of Building and Improvements 29,878      
Accumulated Depreciation 9,331      
Seniors Housing Operating | Bournemouth, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,527      
Initial Cost of Building & Improvements 42,547      
Cost Capitalized Subsequent to Acquisition 6,334      
Carrying Amount of Land 6,143      
Carrying Amount of Building and Improvements 48,265      
Accumulated Depreciation 12,456      
Seniors Housing Operating | Braintree, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 41,290      
Cost Capitalized Subsequent to Acquisition 1,282      
Carrying Amount of Land 100      
Carrying Amount of Building and Improvements 42,472      
Accumulated Depreciation 11,224      
Seniors Housing Operating | Brampton, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 40,728      
Initial Cost of Land 10,196      
Initial Cost of Building & Improvements 59,989      
Cost Capitalized Subsequent to Acquisition 5,359      
Carrying Amount of Land 10,906      
Carrying Amount of Building and Improvements 64,638      
Accumulated Depreciation 14,535      
Seniors Housing Operating | Brandon, MS        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,220      
Initial Cost of Building & Improvements 10,241      
Cost Capitalized Subsequent to Acquisition 867      
Carrying Amount of Land 1,220      
Carrying Amount of Building and Improvements 11,108      
Accumulated Depreciation 2,945      
Seniors Housing Operating | Bremerton, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 26,732      
Carrying Amount of Land 2,417      
Carrying Amount of Building and Improvements 24,315      
Accumulated Depreciation 7      
Seniors Housing Operating | Brentwood, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,537      
Initial Cost of Building & Improvements 45,869      
Cost Capitalized Subsequent to Acquisition 6,786      
Carrying Amount of Land 9,454      
Carrying Amount of Building and Improvements 51,738      
Accumulated Depreciation 5,881      
Seniors Housing Operating | Brick, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,170      
Initial Cost of Building & Improvements 17,372      
Cost Capitalized Subsequent to Acquisition 1,797      
Carrying Amount of Land 1,213      
Carrying Amount of Building and Improvements 19,126      
Accumulated Depreciation 5,383      
Seniors Housing Operating | Brick, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 690      
Initial Cost of Building & Improvements 17,125      
Cost Capitalized Subsequent to Acquisition 5,933      
Carrying Amount of Land 695      
Carrying Amount of Building and Improvements 23,053      
Accumulated Depreciation 5,412      
Seniors Housing Operating | Bridgewater, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Building & Improvements 48,201      
Cost Capitalized Subsequent to Acquisition 2,992      
Carrying Amount of Land 1,774      
Carrying Amount of Building and Improvements 51,149      
Accumulated Depreciation 13,166      
Seniors Housing Operating | Brockport, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Building & Improvements 23,355      
Cost Capitalized Subsequent to Acquisition 142      
Carrying Amount of Land 1,642      
Carrying Amount of Building and Improvements 23,355      
Accumulated Depreciation 4,552      
Seniors Housing Operating | Brockville, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,301      
Initial Cost of Land 484      
Initial Cost of Building & Improvements 7,445      
Cost Capitalized Subsequent to Acquisition 1,110      
Carrying Amount of Land 533      
Carrying Amount of Building and Improvements 8,506      
Accumulated Depreciation 1,754      
Seniors Housing Operating | Brookfield, WI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,300      
Initial Cost of Building & Improvements 12,830      
Cost Capitalized Subsequent to Acquisition 227      
Carrying Amount of Land 1,300      
Carrying Amount of Building and Improvements 13,057      
Accumulated Depreciation 2,511      
Seniors Housing Operating | Broomfield, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,140      
Initial Cost of Building & Improvements 44,547      
Cost Capitalized Subsequent to Acquisition 14,643      
Carrying Amount of Land 10,140      
Carrying Amount of Building and Improvements 53,190      
Accumulated Depreciation 20,993      
Seniors Housing Operating | Brossard, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,233      
Initial Cost of Land 5,499      
Initial Cost of Building & Improvements 31,854      
Cost Capitalized Subsequent to Acquisition 3,463      
Carrying Amount of Land 5,813      
Carrying Amount of Building and Improvements 35,003      
Accumulated Depreciation 8,694      
Seniors Housing Operating | Buckingham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,979      
Initial Cost of Building & Improvements 13,880      
Cost Capitalized Subsequent to Acquisition 2,521      
Carrying Amount of Land 3,327      
Carrying Amount of Building and Improvements 16,053      
Accumulated Depreciation 3,035      
Seniors Housing Operating | Buffalo Grove, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,850      
Initial Cost of Building & Improvements 49,129      
Cost Capitalized Subsequent to Acquisition 4,325      
Carrying Amount of Land 2,850      
Carrying Amount of Building and Improvements 53,454      
Accumulated Depreciation 13,701      
Seniors Housing Operating | Burbank, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,940      
Initial Cost of Building & Improvements 43,466      
Cost Capitalized Subsequent to Acquisition 4,846      
Carrying Amount of Land 4,940      
Carrying Amount of Building and Improvements 48,312      
Accumulated Depreciation 13,352      
Seniors Housing Operating | Burbank, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 18,476      
Initial Cost of Land 3,610      
Initial Cost of Building & Improvements 50,817      
Cost Capitalized Subsequent to Acquisition 4,315      
Carrying Amount of Land 3,610      
Carrying Amount of Building and Improvements 55,132      
Accumulated Depreciation 8,536      
Seniors Housing Operating | Burke, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 52,550      
Carrying Amount of Land 2,575      
Carrying Amount of Building and Improvements 49,975      
Accumulated Depreciation 2,496      
Seniors Housing Operating | Burleson, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,150      
Initial Cost of Building & Improvements 10,437      
Cost Capitalized Subsequent to Acquisition 702      
Carrying Amount of Land 3,150      
Carrying Amount of Building and Improvements 11,139      
Accumulated Depreciation 1,986      
Seniors Housing Operating | Burlingame, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 62,786      
Cost Capitalized Subsequent to Acquisition 141      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 62,927      
Accumulated Depreciation 8,886      
Seniors Housing Operating | Burlington, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,594      
Initial Cost of Land 1,309      
Initial Cost of Building & Improvements 19,311      
Cost Capitalized Subsequent to Acquisition 2,676      
Carrying Amount of Land 1,433      
Carrying Amount of Building and Improvements 21,863      
Accumulated Depreciation 5,769      
Seniors Housing Operating | Burlington, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,443      
Initial Cost of Building & Improvements 34,354      
Cost Capitalized Subsequent to Acquisition 1,671      
Carrying Amount of Land 2,578      
Carrying Amount of Building and Improvements 35,890      
Accumulated Depreciation 9,969      
Seniors Housing Operating | Burlington, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 877      
Initial Cost of Building & Improvements 15,030      
Cost Capitalized Subsequent to Acquisition 915      
Carrying Amount of Land 877      
Carrying Amount of Building and Improvements 15,945      
Accumulated Depreciation 1,833      
Seniors Housing Operating | Burlington, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 768      
Initial Cost of Building & Improvements 7,622      
Cost Capitalized Subsequent to Acquisition 568      
Carrying Amount of Land 768      
Carrying Amount of Building and Improvements 8,190      
Accumulated Depreciation 1,090      
Seniors Housing Operating | Bushey, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 12,690      
Initial Cost of Building & Improvements 36,482      
Cost Capitalized Subsequent to Acquisition 3,763      
Carrying Amount of Land 13,594      
Carrying Amount of Building and Improvements 39,341      
Accumulated Depreciation 2,890      
Seniors Housing Operating | Calgary, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,958      
Initial Cost of Land 2,252      
Initial Cost of Building & Improvements 37,415      
Cost Capitalized Subsequent to Acquisition 4,441      
Carrying Amount of Land 2,481      
Carrying Amount of Building and Improvements 41,627      
Accumulated Depreciation 11,250      
Seniors Housing Operating | Calgary, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,398      
Initial Cost of Land 2,793      
Initial Cost of Building & Improvements 41,179      
Cost Capitalized Subsequent to Acquisition 4,674      
Carrying Amount of Land 3,049      
Carrying Amount of Building and Improvements 45,597      
Accumulated Depreciation 12,073      
Seniors Housing Operating | Calgary, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,876      
Initial Cost of Land 3,122      
Initial Cost of Building & Improvements 38,971      
Cost Capitalized Subsequent to Acquisition 4,837      
Carrying Amount of Land 3,452      
Carrying Amount of Building and Improvements 43,478      
Accumulated Depreciation 11,351      
Seniors Housing Operating | Calgary, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 21,132      
Initial Cost of Land 3,431      
Initial Cost of Building & Improvements 28,983      
Cost Capitalized Subsequent to Acquisition 4,317      
Carrying Amount of Land 3,718      
Carrying Amount of Building and Improvements 33,013      
Accumulated Depreciation 7,963      
Seniors Housing Operating | Calgary, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 24,841      
Initial Cost of Land 2,385      
Initial Cost of Building & Improvements 36,776      
Cost Capitalized Subsequent to Acquisition 5,754      
Carrying Amount of Land 2,595      
Carrying Amount of Building and Improvements 42,320      
Accumulated Depreciation 8,175      
Seniors Housing Operating | Camberley, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,654      
Initial Cost of Building & Improvements 5,736      
Cost Capitalized Subsequent to Acquisition 20,037      
Carrying Amount of Land 5,947      
Carrying Amount of Building and Improvements 22,480      
Accumulated Depreciation 2,847      
Seniors Housing Operating | Camberley, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,974      
Initial Cost of Building & Improvements 39,168      
Cost Capitalized Subsequent to Acquisition 3,791      
Carrying Amount of Land 10,684      
Carrying Amount of Building and Improvements 42,249      
Accumulated Depreciation 4,098      
Seniors Housing Operating | Camillus, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,071      
Initial Cost of Building & Improvements 11,149      
Cost Capitalized Subsequent to Acquisition 766      
Carrying Amount of Land 2,071      
Carrying Amount of Building and Improvements 11,915      
Accumulated Depreciation 1,442      
Seniors Housing Operating | Cardiff, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,191      
Initial Cost of Building & Improvements 12,566      
Cost Capitalized Subsequent to Acquisition 3,576      
Carrying Amount of Land 3,559      
Carrying Amount of Building and Improvements 15,774      
Accumulated Depreciation 4,779      
Seniors Housing Operating | Cardiff by the Sea, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 35,133      
Initial Cost of Land 5,880      
Initial Cost of Building & Improvements 64,711      
Cost Capitalized Subsequent to Acquisition 5,313      
Carrying Amount of Land 5,880      
Carrying Amount of Building and Improvements 70,024      
Accumulated Depreciation 20,409      
Seniors Housing Operating | Carmichael, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 24,155      
Initial Cost of Land 2,440      
Initial Cost of Building & Improvements 41,959      
Cost Capitalized Subsequent to Acquisition 1,935      
Carrying Amount of Land 2,440      
Carrying Amount of Building and Improvements 43,894      
Accumulated Depreciation 2,893      
Seniors Housing Operating | Carol Stream, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Building & Improvements 55,048      
Cost Capitalized Subsequent to Acquisition 4,076      
Carrying Amount of Land 1,730      
Carrying Amount of Building and Improvements 59,124      
Accumulated Depreciation 16,036      
Seniors Housing Operating | Carrollton, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,280      
Initial Cost of Building & Improvements 31,444      
Cost Capitalized Subsequent to Acquisition 1,513      
Carrying Amount of Land 4,280      
Carrying Amount of Building and Improvements 32,957      
Accumulated Depreciation 6,058      
Seniors Housing Operating | Cary, NC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 740      
Initial Cost of Building & Improvements 45,240      
Cost Capitalized Subsequent to Acquisition 986      
Carrying Amount of Land 742      
Carrying Amount of Building and Improvements 46,224      
Accumulated Depreciation 10,734      
Seniors Housing Operating | Cary, NC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,112      
Initial Cost of Building & Improvements 70,008      
Cost Capitalized Subsequent to Acquisition 10,053      
Carrying Amount of Land 6,155      
Carrying Amount of Building and Improvements 80,018      
Accumulated Depreciation 13,977      
Seniors Housing Operating | Cedar Hill, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 26,503      
Carrying Amount of Land 1,958      
Carrying Amount of Building and Improvements 24,545      
Accumulated Depreciation 127      
Seniors Housing Operating | Cedar Park, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Building & Improvements 15,664      
Cost Capitalized Subsequent to Acquisition 775      
Carrying Amount of Land 1,750      
Carrying Amount of Building and Improvements 16,439      
Accumulated Depreciation 1,929      
Seniors Housing Operating | Cerritos, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 27,494      
Cost Capitalized Subsequent to Acquisition 7,051      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 34,545      
Accumulated Depreciation 8,444      
Seniors Housing Operating | Charlottesville, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,651      
Initial Cost of Building & Improvements 91,468      
Cost Capitalized Subsequent to Acquisition 17,155      
Carrying Amount of Land 4,651      
Carrying Amount of Building and Improvements 108,623      
Accumulated Depreciation 18,492      
Seniors Housing Operating | Chatham, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 382      
Initial Cost of Land 1,098      
Initial Cost of Building & Improvements 12,462      
Cost Capitalized Subsequent to Acquisition 4,231      
Carrying Amount of Land 1,272      
Carrying Amount of Building and Improvements 16,519      
Accumulated Depreciation 4,229      
Seniors Housing Operating | Chelmsford, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Building & Improvements 10,951      
Cost Capitalized Subsequent to Acquisition 4,744      
Carrying Amount of Land 1,123      
Carrying Amount of Building and Improvements 15,612      
Accumulated Depreciation 5,392      
Seniors Housing Operating | Chertsey, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,566      
Initial Cost of Building & Improvements 25,886      
Cost Capitalized Subsequent to Acquisition 3,241      
Carrying Amount of Land 10,247      
Carrying Amount of Building and Improvements 28,446      
Accumulated Depreciation 2,645      
Seniors Housing Operating | Chesterfield, MO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,857      
Initial Cost of Building & Improvements 48,366      
Cost Capitalized Subsequent to Acquisition 1,684      
Carrying Amount of Land 1,917      
Carrying Amount of Building and Improvements 49,990      
Accumulated Depreciation 12,277      
Seniors Housing Operating | Chesterton, IN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,980      
Initial Cost of Building & Improvements 37,496      
Cost Capitalized Subsequent to Acquisition 1,246      
Carrying Amount of Land 2,980      
Carrying Amount of Building and Improvements 38,742      
Accumulated Depreciation 216      
Seniors Housing Operating | Chorleywood, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,636      
Initial Cost of Building & Improvements 43,191      
Cost Capitalized Subsequent to Acquisition 8,343      
Carrying Amount of Land 6,268      
Carrying Amount of Building and Improvements 50,902      
Accumulated Depreciation 14,586      
Seniors Housing Operating | Chula Vista, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,072      
Initial Cost of Building & Improvements 22,163      
Cost Capitalized Subsequent to Acquisition 1,506      
Carrying Amount of Land 2,186      
Carrying Amount of Building and Improvements 23,555      
Accumulated Depreciation 6,264      
Seniors Housing Operating | Church Crookham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,591      
Initial Cost of Building & Improvements 14,215      
Cost Capitalized Subsequent to Acquisition 2,512      
Carrying Amount of Land 2,890      
Carrying Amount of Building and Improvements 16,428      
Accumulated Depreciation 3,855      
Seniors Housing Operating | Cincinnati, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Building & Improvements 11,287      
Cost Capitalized Subsequent to Acquisition 79      
Carrying Amount of Land 1,750      
Carrying Amount of Building and Improvements 11,366      
Accumulated Depreciation 723      
Seniors Housing Operating | Citrus Heights, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,300      
Initial Cost of Building & Improvements 31,876      
Cost Capitalized Subsequent to Acquisition 2,353      
Carrying Amount of Land 2,300      
Carrying Amount of Building and Improvements 34,229      
Accumulated Depreciation 10,753      
Seniors Housing Operating | Claremont, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,430      
Initial Cost of Building & Improvements 9,928      
Cost Capitalized Subsequent to Acquisition 2,019      
Carrying Amount of Land 2,515      
Carrying Amount of Building and Improvements 11,862      
Accumulated Depreciation 3,635      
Seniors Housing Operating | Clay, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,316      
Initial Cost of Building & Improvements 10,734      
Cost Capitalized Subsequent to Acquisition 734      
Carrying Amount of Land 1,316      
Carrying Amount of Building and Improvements 11,468      
Accumulated Depreciation 1,357      
Seniors Housing Operating | Cleburne, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 520      
Initial Cost of Building & Improvements 5,369      
Cost Capitalized Subsequent to Acquisition 7      
Carrying Amount of Land 520      
Carrying Amount of Building and Improvements 5,376      
Accumulated Depreciation 1,960      
Seniors Housing Operating | Cohasset, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,485      
Initial Cost of Building & Improvements 26,147      
Cost Capitalized Subsequent to Acquisition 2,174      
Carrying Amount of Land 2,500      
Carrying Amount of Building and Improvements 28,306      
Accumulated Depreciation 7,753      
Seniors Housing Operating | Colleyville, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,050      
Initial Cost of Building & Improvements 17,082      
Cost Capitalized Subsequent to Acquisition 53      
Carrying Amount of Land 1,050      
Carrying Amount of Building and Improvements 17,135      
Accumulated Depreciation 1,848      
Seniors Housing Operating | Colorado Springs, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 800      
Initial Cost of Building & Improvements 14,756      
Cost Capitalized Subsequent to Acquisition 2,060      
Carrying Amount of Land 1,034      
Carrying Amount of Building and Improvements 16,582      
Accumulated Depreciation 4,791      
Seniors Housing Operating | Colts Neck, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 780      
Initial Cost of Building & Improvements 14,733      
Cost Capitalized Subsequent to Acquisition 3,216      
Carrying Amount of Land 1,269      
Carrying Amount of Building and Improvements 17,460      
Accumulated Depreciation 4,808      
Seniors Housing Operating | Columbus, IN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 610      
Initial Cost of Building & Improvements 3,190      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 610      
Carrying Amount of Building and Improvements 3,190      
Accumulated Depreciation 940      
Seniors Housing Operating | Conroe, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 980      
Initial Cost of Building & Improvements 7,771      
Cost Capitalized Subsequent to Acquisition 27      
Carrying Amount of Land 980      
Carrying Amount of Building and Improvements 7,798      
Accumulated Depreciation 2,423      
Seniors Housing Operating | Coos Bay, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 9,416      
Carrying Amount of Land 864      
Carrying Amount of Building and Improvements 8,552      
Accumulated Depreciation 5      
Seniors Housing Operating | Coos Bay, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 12,151      
Carrying Amount of Land 1,792      
Carrying Amount of Building and Improvements 10,359      
Accumulated Depreciation 6      
Seniors Housing Operating | Coquitlam, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,721      
Initial Cost of Land 3,047      
Initial Cost of Building & Improvements 24,567      
Cost Capitalized Subsequent to Acquisition 3,352      
Carrying Amount of Land 3,344      
Carrying Amount of Building and Improvements 27,622      
Accumulated Depreciation 8,403      
Seniors Housing Operating | Crystal Lake, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 875      
Initial Cost of Building & Improvements 12,461      
Cost Capitalized Subsequent to Acquisition 1,678      
Carrying Amount of Land 971      
Carrying Amount of Building and Improvements 14,043      
Accumulated Depreciation 4,359      
Seniors Housing Operating | Dallas, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,330      
Initial Cost of Building & Improvements 114,794      
Cost Capitalized Subsequent to Acquisition 2,606      
Carrying Amount of Land 6,330      
Carrying Amount of Building and Improvements 117,400      
Accumulated Depreciation 20,125      
Seniors Housing Operating | Decatur, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 31,336      
Carrying Amount of Land 1,946      
Carrying Amount of Building and Improvements 29,390      
Accumulated Depreciation 8,285      
Seniors Housing Operating | Denver, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,450      
Initial Cost of Building & Improvements 19,389      
Cost Capitalized Subsequent to Acquisition 4,606      
Carrying Amount of Land 1,450      
Carrying Amount of Building and Improvements 23,995      
Accumulated Depreciation 5,701      
Seniors Housing Operating | Denver, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,910      
Initial Cost of Building & Improvements 35,838      
Cost Capitalized Subsequent to Acquisition 6,259      
Carrying Amount of Land 2,910      
Carrying Amount of Building and Improvements 42,097      
Accumulated Depreciation 11,184      
Seniors Housing Operating | Denver, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,402      
Initial Cost of Building & Improvements 105,307      
Cost Capitalized Subsequent to Acquisition 8,008      
Carrying Amount of Land 5,402      
Carrying Amount of Building and Improvements 113,315      
Accumulated Depreciation 10,003      
Seniors Housing Operating | Denver, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 24,301      
Carrying Amount of Land 1,989      
Carrying Amount of Building and Improvements 22,312      
Accumulated Depreciation 153      
Seniors Housing Operating | Dix Hills, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,808      
Initial Cost of Building & Improvements 39,014      
Cost Capitalized Subsequent to Acquisition 2,279      
Carrying Amount of Land 3,959      
Carrying Amount of Building and Improvements 41,142      
Accumulated Depreciation 10,964      
Seniors Housing Operating | Dollard-Des-Ormeaux, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,957      
Initial Cost of Building & Improvements 14,431      
Cost Capitalized Subsequent to Acquisition 1,878      
Carrying Amount of Land 2,185      
Carrying Amount of Building and Improvements 16,081      
Accumulated Depreciation 5,908      
Seniors Housing Operating | Dresher, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,380      
Initial Cost of Land 1,900      
Initial Cost of Building & Improvements 10,664      
Cost Capitalized Subsequent to Acquisition 1,361      
Carrying Amount of Land 1,914      
Carrying Amount of Building and Improvements 12,011      
Accumulated Depreciation 4,397      
Seniors Housing Operating | Dublin, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,169      
Initial Cost of Building & Improvements 25,345      
Cost Capitalized Subsequent to Acquisition 157      
Carrying Amount of Land 1,169      
Carrying Amount of Building and Improvements 25,502      
Accumulated Depreciation 3,903      
Seniors Housing Operating | East Amherst, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,626      
Initial Cost of Building & Improvements 10,765      
Cost Capitalized Subsequent to Acquisition 863      
Carrying Amount of Land 1,626      
Carrying Amount of Building and Improvements 11,628      
Accumulated Depreciation 1,501      
Seniors Housing Operating | East Meadow, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 69      
Initial Cost of Building & Improvements 45,991      
Cost Capitalized Subsequent to Acquisition 2,003      
Carrying Amount of Land 127      
Carrying Amount of Building and Improvements 47,936      
Accumulated Depreciation 12,498      
Seniors Housing Operating | East Setauket, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,920      
Initial Cost of Building & Improvements 37,354      
Cost Capitalized Subsequent to Acquisition 2,102      
Carrying Amount of Land 4,986      
Carrying Amount of Building and Improvements 39,390      
Accumulated Depreciation 10,360      
Seniors Housing Operating | Eastbourne, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,145      
Initial Cost of Building & Improvements 33,744      
Cost Capitalized Subsequent to Acquisition 4,798      
Carrying Amount of Land 4,604      
Carrying Amount of Building and Improvements 38,083      
Accumulated Depreciation 10,244      
Seniors Housing Operating | Edgbaston, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Building & Improvements 13,969      
Cost Capitalized Subsequent to Acquisition 2,142      
Carrying Amount of Land 3,012      
Carrying Amount of Building and Improvements 15,819      
Accumulated Depreciation 1,792      
Seniors Housing Operating | Edgewater, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,561      
Initial Cost of Building & Improvements 25,047      
Cost Capitalized Subsequent to Acquisition 1,896      
Carrying Amount of Land 4,564      
Carrying Amount of Building and Improvements 26,940      
Accumulated Depreciation 7,439      
Seniors Housing Operating | Edison, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,892      
Initial Cost of Building & Improvements 32,314      
Cost Capitalized Subsequent to Acquisition 3,634      
Carrying Amount of Land 1,943      
Carrying Amount of Building and Improvements 35,897      
Accumulated Depreciation 11,562      
Seniors Housing Operating | Edmonds, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,650      
Initial Cost of Building & Improvements 24,449      
Cost Capitalized Subsequent to Acquisition 9,428      
Carrying Amount of Land 1,765      
Carrying Amount of Building and Improvements 33,762      
Accumulated Depreciation 5,802      
Seniors Housing Operating | Edmonds, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 30,883      
Carrying Amount of Land 2,891      
Carrying Amount of Building and Improvements 27,992      
Accumulated Depreciation 6      
Seniors Housing Operating | Edmonton, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,871      
Initial Cost of Land 1,589      
Initial Cost of Building & Improvements 29,819      
Cost Capitalized Subsequent to Acquisition 4,079      
Carrying Amount of Land 1,782      
Carrying Amount of Building and Improvements 33,705      
Accumulated Depreciation 9,321      
Seniors Housing Operating | Edmonton, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,332      
Initial Cost of Land 2,063      
Initial Cost of Building & Improvements 37,293      
Cost Capitalized Subsequent to Acquisition 4,931      
Carrying Amount of Land 2,257      
Carrying Amount of Building and Improvements 42,030      
Accumulated Depreciation 13,320      
Seniors Housing Operating | El Dorado Hills, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,190      
Initial Cost of Building & Improvements 52,112      
Cost Capitalized Subsequent to Acquisition 156      
Carrying Amount of Land 5,190      
Carrying Amount of Building and Improvements 52,268      
Accumulated Depreciation 1,762      
Seniors Housing Operating | Encino, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,040      
Initial Cost of Building & Improvements 46,255      
Cost Capitalized Subsequent to Acquisition 5,986      
Carrying Amount of Land 5,040      
Carrying Amount of Building and Improvements 52,241      
Accumulated Depreciation 13,879      
Seniors Housing Operating | Englishtown, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 690      
Initial Cost of Building & Improvements 12,520      
Cost Capitalized Subsequent to Acquisition 2,335      
Carrying Amount of Land 860      
Carrying Amount of Building and Improvements 14,685      
Accumulated Depreciation 4,353      
Seniors Housing Operating | Epsom, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 20,159      
Initial Cost of Building & Improvements 34,803      
Cost Capitalized Subsequent to Acquisition 6,798      
Carrying Amount of Land 22,324      
Carrying Amount of Building and Improvements 39,436      
Accumulated Depreciation 4,528      
Seniors Housing Operating | Erie, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,455      
Initial Cost of Building & Improvements 8,324      
Cost Capitalized Subsequent to Acquisition 792      
Carrying Amount of Land 1,455      
Carrying Amount of Building and Improvements 9,116      
Accumulated Depreciation 1,292      
Seniors Housing Operating | Esher, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,783      
Initial Cost of Building & Improvements 48,361      
Cost Capitalized Subsequent to Acquisition 10,235      
Carrying Amount of Land 6,427      
Carrying Amount of Building and Improvements 57,952      
Accumulated Depreciation 14,454      
Seniors Housing Operating | Everett, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 9,923      
Carrying Amount of Land 638      
Carrying Amount of Building and Improvements 9,285      
Accumulated Depreciation 4      
Seniors Housing Operating | Fairfield, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,120      
Initial Cost of Building & Improvements 43,868      
Cost Capitalized Subsequent to Acquisition 2,447      
Carrying Amount of Land 3,255      
Carrying Amount of Building and Improvements 46,180      
Accumulated Depreciation 12,090      
Seniors Housing Operating | Fairfield, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,460      
Initial Cost of Building & Improvements 14,040      
Cost Capitalized Subsequent to Acquisition 5,375      
Carrying Amount of Land 1,460      
Carrying Amount of Building and Improvements 19,415      
Accumulated Depreciation 7,797      
Seniors Housing Operating | Fairfield, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,416      
Initial Cost of Building & Improvements 12,627      
Cost Capitalized Subsequent to Acquisition 294      
Carrying Amount of Land 1,416      
Carrying Amount of Building and Improvements 12,921      
Accumulated Depreciation 991      
Seniors Housing Operating | Fareham, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,408      
Initial Cost of Building & Improvements 17,970      
Cost Capitalized Subsequent to Acquisition 2,900      
Carrying Amount of Land 3,800      
Carrying Amount of Building and Improvements 20,478      
Accumulated Depreciation 4,373      
Seniors Housing Operating | Florence, AL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 353      
Initial Cost of Building & Improvements 13,049      
Cost Capitalized Subsequent to Acquisition 1,243      
Carrying Amount of Land 385      
Carrying Amount of Building and Improvements 14,260      
Accumulated Depreciation 4,370      
Seniors Housing Operating | Flossmoor, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,292      
Initial Cost of Building & Improvements 9,496      
Cost Capitalized Subsequent to Acquisition 2,112      
Carrying Amount of Land 1,339      
Carrying Amount of Building and Improvements 11,561      
Accumulated Depreciation 3,959      
Seniors Housing Operating | Folsom, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,490      
Initial Cost of Building & Improvements 32,754      
Cost Capitalized Subsequent to Acquisition 101      
Carrying Amount of Land 1,490      
Carrying Amount of Building and Improvements 32,855      
Accumulated Depreciation 6,212      
Seniors Housing Operating | Fort Wayne, IN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 46,548      
Carrying Amount of Land 3,637      
Carrying Amount of Building and Improvements 42,911      
Accumulated Depreciation 183      
Seniors Housing Operating | Fort Worth, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,131      
Initial Cost of Building & Improvements 52,680      
Cost Capitalized Subsequent to Acquisition 2,365      
Carrying Amount of Land 7,131      
Carrying Amount of Building and Improvements 55,045      
Accumulated Depreciation 5,260      
Seniors Housing Operating | Fort Worth, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 21,446      
Carrying Amount of Land 2,538      
Carrying Amount of Building and Improvements 18,908      
Accumulated Depreciation 529      
Seniors Housing Operating | Fort Worth, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,080      
Initial Cost of Building & Improvements 27,888      
Cost Capitalized Subsequent to Acquisition 5,314      
Carrying Amount of Land 2,080      
Carrying Amount of Building and Improvements 33,202      
Accumulated Depreciation 9,741      
Seniors Housing Operating | Fort Worth, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,740      
Initial Cost of Building & Improvements 19,799      
Cost Capitalized Subsequent to Acquisition 766      
Carrying Amount of Land 1,740      
Carrying Amount of Building and Improvements 20,565      
Accumulated Depreciation 3,011      
Seniors Housing Operating | Fremont, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,400      
Initial Cost of Building & Improvements 25,300      
Cost Capitalized Subsequent to Acquisition 6,190      
Carrying Amount of Land 3,456      
Carrying Amount of Building and Improvements 31,434      
Accumulated Depreciation 11,995      
Seniors Housing Operating | Fresno, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 23,376      
Initial Cost of Land 2,459      
Initial Cost of Building & Improvements 33,023      
Cost Capitalized Subsequent to Acquisition 1,755      
Carrying Amount of Land 2,459      
Carrying Amount of Building and Improvements 34,778      
Accumulated Depreciation 2,543      
Seniors Housing Operating | Frome, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Building & Improvements 14,813      
Cost Capitalized Subsequent to Acquisition 2,569      
Carrying Amount of Land 3,012      
Carrying Amount of Building and Improvements 17,090      
Accumulated Depreciation 3,321      
Seniors Housing Operating | Fullerton, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,964      
Initial Cost of Building & Improvements 19,989      
Cost Capitalized Subsequent to Acquisition 1,277      
Carrying Amount of Land 1,998      
Carrying Amount of Building and Improvements 21,232      
Accumulated Depreciation 5,885      
Seniors Housing Operating | Gahanna, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 772      
Initial Cost of Building & Improvements 11,214      
Cost Capitalized Subsequent to Acquisition 1,920      
Carrying Amount of Land 787      
Carrying Amount of Building and Improvements 13,119      
Accumulated Depreciation 3,672      
Seniors Housing Operating | Gardnerville, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,143      
Initial Cost of Building & Improvements 10,831      
Cost Capitalized Subsequent to Acquisition 2,203      
Carrying Amount of Land 1,164      
Carrying Amount of Building and Improvements 13,013      
Accumulated Depreciation 9,346      
Seniors Housing Operating | Gig Harbor, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,560      
Initial Cost of Building & Improvements 15,947      
Cost Capitalized Subsequent to Acquisition 2,347      
Carrying Amount of Land 1,583      
Carrying Amount of Building and Improvements 18,271      
Accumulated Depreciation 5,298      
Seniors Housing Operating | Gilbert, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,200      
Initial Cost of Land 2,160      
Initial Cost of Building & Improvements 28,246      
Cost Capitalized Subsequent to Acquisition 2,255      
Carrying Amount of Land 2,206      
Carrying Amount of Building and Improvements 30,455      
Accumulated Depreciation 10,058      
Seniors Housing Operating | Glen Cove, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,594      
Initial Cost of Building & Improvements 35,236      
Cost Capitalized Subsequent to Acquisition 2,432      
Carrying Amount of Land 4,643      
Carrying Amount of Building and Improvements 37,619      
Accumulated Depreciation 11,444      
Seniors Housing Operating | Glenview, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,090      
Initial Cost of Building & Improvements 69,288      
Cost Capitalized Subsequent to Acquisition 4,924      
Carrying Amount of Land 2,090      
Carrying Amount of Building and Improvements 74,212      
Accumulated Depreciation 20,009      
Seniors Housing Operating | Golden Valley, MN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,600      
Initial Cost of Land 1,520      
Initial Cost of Building & Improvements 33,513      
Cost Capitalized Subsequent to Acquisition 1,609      
Carrying Amount of Land 1,634      
Carrying Amount of Building and Improvements 35,008      
Accumulated Depreciation 8,973      
Seniors Housing Operating | Granbury, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,040      
Initial Cost of Building & Improvements 30,670      
Cost Capitalized Subsequent to Acquisition 746      
Carrying Amount of Land 2,040      
Carrying Amount of Building and Improvements 31,416      
Accumulated Depreciation 8,060      
Seniors Housing Operating | Grimsby, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 636      
Initial Cost of Building & Improvements 5,617      
Cost Capitalized Subsequent to Acquisition 947      
Carrying Amount of Land 694      
Carrying Amount of Building and Improvements 6,506      
Accumulated Depreciation 1,441      
Seniors Housing Operating | Grosse Pointe Woods, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 950      
Initial Cost of Building & Improvements 13,662      
Cost Capitalized Subsequent to Acquisition 913      
Carrying Amount of Land 950      
Carrying Amount of Building and Improvements 14,575      
Accumulated Depreciation 3,693      
Seniors Housing Operating | Grosse Pointe Woods, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,430      
Initial Cost of Building & Improvements 31,777      
Cost Capitalized Subsequent to Acquisition 1,284      
Carrying Amount of Land 1,435      
Carrying Amount of Building and Improvements 33,056      
Accumulated Depreciation 8,353      
Seniors Housing Operating | Grove City, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 36,420      
Initial Cost of Land 3,575      
Initial Cost of Building & Improvements 85,764      
Cost Capitalized Subsequent to Acquisition 966      
Carrying Amount of Land 3,498      
Carrying Amount of Building and Improvements 86,807      
Accumulated Depreciation 6,373      
Seniors Housing Operating | Guildford, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,361      
Initial Cost of Building & Improvements 56,494      
Cost Capitalized Subsequent to Acquisition 7,236      
Carrying Amount of Land 5,940      
Carrying Amount of Building and Improvements 63,151      
Accumulated Depreciation 15,926      
Seniors Housing Operating | Gurnee, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 890      
Initial Cost of Building & Improvements 27,931      
Cost Capitalized Subsequent to Acquisition 2,610      
Carrying Amount of Land 935      
Carrying Amount of Building and Improvements 30,496      
Accumulated Depreciation 7,606      
Seniors Housing Operating | Haddonfield, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 520      
Initial Cost of Building & Improvements 16,363      
Cost Capitalized Subsequent to Acquisition 641      
Carrying Amount of Land 527      
Carrying Amount of Building and Improvements 16,997      
Accumulated Depreciation 2,848      
Seniors Housing Operating | Hamburg, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 967      
Initial Cost of Building & Improvements 10,014      
Cost Capitalized Subsequent to Acquisition 821      
Carrying Amount of Land 967      
Carrying Amount of Building and Improvements 10,835      
Accumulated Depreciation 1,368      
Seniors Housing Operating | Hamilton, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,163      
Initial Cost of Building & Improvements 11,968      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,163      
Carrying Amount of Building and Improvements 11,968      
Accumulated Depreciation 957      
Seniors Housing Operating | Hampshire, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,172      
Initial Cost of Building & Improvements 26,035      
Cost Capitalized Subsequent to Acquisition 3,658      
Carrying Amount of Land 4,632      
Carrying Amount of Building and Improvements 29,233      
Accumulated Depreciation 7,764      
Seniors Housing Operating | Happy Valley, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 721      
Initial Cost of Building & Improvements 9,920      
Cost Capitalized Subsequent to Acquisition 446      
Carrying Amount of Land 721      
Carrying Amount of Building and Improvements 10,366      
Accumulated Depreciation 1,051      
Seniors Housing Operating | Haverford, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,880      
Initial Cost of Building & Improvements 33,993      
Cost Capitalized Subsequent to Acquisition 2,745      
Carrying Amount of Land 1,904      
Carrying Amount of Building and Improvements 36,714      
Accumulated Depreciation 9,369      
Seniors Housing Operating | Henderson, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,190      
Initial Cost of Building & Improvements 11,600      
Cost Capitalized Subsequent to Acquisition 1,144      
Carrying Amount of Land 1,253      
Carrying Amount of Building and Improvements 12,681      
Accumulated Depreciation 4,488      
Seniors Housing Operating | High Wycombe, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,567      
Initial Cost of Building & Improvements 13,422      
Cost Capitalized Subsequent to Acquisition 1,771      
Carrying Amount of Land 3,821      
Carrying Amount of Building and Improvements 14,939      
Accumulated Depreciation 1,582      
Seniors Housing Operating | Highland Park, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,820      
Initial Cost of Building & Improvements 15,832      
Cost Capitalized Subsequent to Acquisition 890      
Carrying Amount of Land 2,820      
Carrying Amount of Building and Improvements 16,722      
Accumulated Depreciation 3,511      
Seniors Housing Operating | Highland Park, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Building & Improvements 25,313      
Cost Capitalized Subsequent to Acquisition 1,626      
Carrying Amount of Land 2,271      
Carrying Amount of Building and Improvements 26,918      
Accumulated Depreciation 7,965      
Seniors Housing Operating | Hindhead, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 17,852      
Initial Cost of Building & Improvements 48,645      
Cost Capitalized Subsequent to Acquisition 8,307      
Carrying Amount of Land 19,769      
Carrying Amount of Building and Improvements 55,035      
Accumulated Depreciation 6,302      
Seniors Housing Operating | Hingham, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,440      
Initial Cost of Building & Improvements 32,292      
Cost Capitalized Subsequent to Acquisition 408      
Carrying Amount of Land 1,444      
Carrying Amount of Building and Improvements 32,696      
Accumulated Depreciation 6,220      
Seniors Housing Operating | Holbrook, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,957      
Initial Cost of Building & Improvements 35,337      
Cost Capitalized Subsequent to Acquisition 2,406      
Carrying Amount of Land 4,219      
Carrying Amount of Building and Improvements 37,481      
Accumulated Depreciation 9,723      
Seniors Housing Operating | Horley, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,332      
Initial Cost of Building & Improvements 12,144      
Cost Capitalized Subsequent to Acquisition 2,413      
Carrying Amount of Land 2,591      
Carrying Amount of Building and Improvements 14,298      
Accumulated Depreciation 3,379      
Seniors Housing Operating | Houston, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,830      
Initial Cost of Building & Improvements 55,674      
Cost Capitalized Subsequent to Acquisition 8,871      
Carrying Amount of Land 3,830      
Carrying Amount of Building and Improvements 64,545      
Accumulated Depreciation 18,811      
Seniors Housing Operating | Houston, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Building & Improvements 31,965      
Cost Capitalized Subsequent to Acquisition 6,602      
Carrying Amount of Land 1,040      
Carrying Amount of Building and Improvements 38,567      
Accumulated Depreciation 9,597      
Seniors Housing Operating | Houston, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Building & Improvements 15,603      
Cost Capitalized Subsequent to Acquisition 1,672      
Carrying Amount of Land 1,750      
Carrying Amount of Building and Improvements 17,275      
Accumulated Depreciation 2,155      
Seniors Housing Operating | Houston, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Building & Improvements 15,420      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 960      
Carrying Amount of Building and Improvements 15,420      
Accumulated Depreciation 8,350      
Seniors Housing Operating | Howell, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,666      
Initial Cost of Land 1,066      
Initial Cost of Building & Improvements 21,577      
Cost Capitalized Subsequent to Acquisition 1,481      
Carrying Amount of Land 1,154      
Carrying Amount of Building and Improvements 22,970      
Accumulated Depreciation 6,161      
Seniors Housing Operating | Huntington Beach, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,808      
Initial Cost of Building & Improvements 31,172      
Cost Capitalized Subsequent to Acquisition 2,780      
Carrying Amount of Land 3,931      
Carrying Amount of Building and Improvements 33,829      
Accumulated Depreciation 10,425      
Seniors Housing Operating | Independence, MO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,550      
Initial Cost of Building & Improvements 14,441      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,550      
Carrying Amount of Building and Improvements 14,441      
Accumulated Depreciation 1,026      
Seniors Housing Operating | Jacksonville, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,550      
Initial Cost of Building & Improvements 29,454      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,550      
Carrying Amount of Building and Improvements 29,454      
Accumulated Depreciation 1,395      
Seniors Housing Operating | Johns Creek, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Building & Improvements 23,285      
Cost Capitalized Subsequent to Acquisition 1,332      
Carrying Amount of Land 1,588      
Carrying Amount of Building and Improvements 24,609      
Accumulated Depreciation 6,496      
Seniors Housing Operating | Johnson City, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,407      
Initial Cost of Building & Improvements 11,862      
Cost Capitalized Subsequent to Acquisition 876      
Carrying Amount of Land 1,407      
Carrying Amount of Building and Improvements 12,738      
Accumulated Depreciation 1,556      
Seniors Housing Operating | Kanata, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,689      
Initial Cost of Building & Improvements 28,670      
Cost Capitalized Subsequent to Acquisition 2,552      
Carrying Amount of Land 1,778      
Carrying Amount of Building and Improvements 31,133      
Accumulated Depreciation 8,426      
Seniors Housing Operating | Kelowna, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,965      
Initial Cost of Land 2,688      
Initial Cost of Building & Improvements 13,647      
Cost Capitalized Subsequent to Acquisition 2,552      
Carrying Amount of Land 2,935      
Carrying Amount of Building and Improvements 15,952      
Accumulated Depreciation 4,895      
Seniors Housing Operating | Kennebunk, ME        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,700      
Initial Cost of Building & Improvements 30,204      
Cost Capitalized Subsequent to Acquisition 5,668      
Carrying Amount of Land 3,304      
Carrying Amount of Building and Improvements 35,268      
Accumulated Depreciation 14,599      
Seniors Housing Operating | Kenner, LA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,100      
Initial Cost of Building & Improvements 10,036      
Cost Capitalized Subsequent to Acquisition 3,132      
Carrying Amount of Land 1,100      
Carrying Amount of Building and Improvements 13,168      
Accumulated Depreciation 10,562      
Seniors Housing Operating | Kennett Square, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,050      
Initial Cost of Building & Improvements 22,946      
Cost Capitalized Subsequent to Acquisition 918      
Carrying Amount of Land 1,104      
Carrying Amount of Building and Improvements 23,810      
Accumulated Depreciation 6,138      
Seniors Housing Operating | Kingston, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,018      
Initial Cost of Land 1,030      
Initial Cost of Building & Improvements 11,416      
Cost Capitalized Subsequent to Acquisition 1,968      
Carrying Amount of Land 1,165      
Carrying Amount of Building and Improvements 13,249      
Accumulated Depreciation 2,524      
Seniors Housing Operating | Kingston upon Thames, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 33,063      
Initial Cost of Building & Improvements 46,696      
Cost Capitalized Subsequent to Acquisition 9,565      
Carrying Amount of Land 36,610      
Carrying Amount of Building and Improvements 52,714      
Accumulated Depreciation 5,883      
Seniors Housing Operating | Kingwood, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Building & Improvements 9,777      
Cost Capitalized Subsequent to Acquisition 999      
Carrying Amount of Land 480      
Carrying Amount of Building and Improvements 10,776      
Accumulated Depreciation 3,084      
Seniors Housing Operating | Kingwood, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,683      
Initial Cost of Building & Improvements 24,207      
Cost Capitalized Subsequent to Acquisition 2,495      
Carrying Amount of Land 1,683      
Carrying Amount of Building and Improvements 26,702      
Accumulated Depreciation 4,596      
Seniors Housing Operating | Kirkland, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,880      
Initial Cost of Building & Improvements 4,315      
Cost Capitalized Subsequent to Acquisition 2,248      
Carrying Amount of Land 1,880      
Carrying Amount of Building and Improvements 6,563      
Accumulated Depreciation 2,334      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,281      
Initial Cost of Land 708      
Initial Cost of Building & Improvements 2,744      
Cost Capitalized Subsequent to Acquisition 285      
Carrying Amount of Land 695      
Carrying Amount of Building and Improvements 3,042      
Accumulated Depreciation 992      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,253      
Initial Cost of Land 1,093      
Initial Cost of Building & Improvements 4,454      
Cost Capitalized Subsequent to Acquisition 1,248      
Carrying Amount of Land 1,186      
Carrying Amount of Building and Improvements 5,609      
Accumulated Depreciation 2,804      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,138      
Initial Cost of Land 1,341      
Initial Cost of Building & Improvements 13,939      
Cost Capitalized Subsequent to Acquisition 5,013      
Carrying Amount of Land 1,498      
Carrying Amount of Building and Improvements 18,795      
Accumulated Depreciation 4,293      
Seniors Housing Operating | Klamath Falls, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 12,961      
Carrying Amount of Land 1,335      
Carrying Amount of Building and Improvements 11,626      
Accumulated Depreciation 9      
Seniors Housing Operating | La Palma, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,950      
Initial Cost of Building & Improvements 16,591      
Cost Capitalized Subsequent to Acquisition 1,312      
Carrying Amount of Land 2,996      
Carrying Amount of Building and Improvements 17,857      
Accumulated Depreciation 4,940      
Seniors Housing Operating | Lackawanna, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,015      
Initial Cost of Building & Improvements 5,280      
Cost Capitalized Subsequent to Acquisition 478      
Carrying Amount of Land 1,015      
Carrying Amount of Building and Improvements 5,758      
Accumulated Depreciation 826      
Seniors Housing Operating | Lafayette Hill, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Building & Improvements 11,848      
Cost Capitalized Subsequent to Acquisition 2,427      
Carrying Amount of Land 1,867      
Carrying Amount of Building and Improvements 14,158      
Accumulated Depreciation 5,021      
Seniors Housing Operating | Laguna Hills, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 12,820      
Initial Cost of Building & Improvements 75,926      
Cost Capitalized Subsequent to Acquisition 19,497      
Carrying Amount of Land 12,820      
Carrying Amount of Building and Improvements 95,423      
Accumulated Depreciation 21,737      
Seniors Housing Operating | Laguna Woods, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,280      
Initial Cost of Building & Improvements 76,485      
Cost Capitalized Subsequent to Acquisition 13,280      
Carrying Amount of Land 11,280      
Carrying Amount of Building and Improvements 89,765      
Accumulated Depreciation 18,637      
Seniors Housing Operating | Laguna Woods, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,150      
Initial Cost of Building & Improvements 57,842      
Cost Capitalized Subsequent to Acquisition 12,329      
Carrying Amount of Land 9,150      
Carrying Amount of Building and Improvements 70,171      
Accumulated Depreciation 14,664      
Seniors Housing Operating | Lake Havascu City, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 2,126      
Carrying Amount of Land 364      
Carrying Amount of Building and Improvements 1,762      
Accumulated Depreciation 3      
Seniors Housing Operating | Lake Zurich, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,470      
Initial Cost of Building & Improvements 9,830      
Cost Capitalized Subsequent to Acquisition 2,867      
Carrying Amount of Land 1,470      
Carrying Amount of Building and Improvements 12,697      
Accumulated Depreciation 4,766      
Seniors Housing Operating | Lancaster, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 700      
Initial Cost of Building & Improvements 15,295      
Cost Capitalized Subsequent to Acquisition 2,173      
Carrying Amount of Land 712      
Carrying Amount of Building and Improvements 17,456      
Accumulated Depreciation 5,756      
Seniors Housing Operating | Lancaster, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,262      
Initial Cost of Building & Improvements 11,154      
Cost Capitalized Subsequent to Acquisition 976      
Carrying Amount of Land 1,262      
Carrying Amount of Building and Improvements 12,130      
Accumulated Depreciation 1,611      
Seniors Housing Operating | Las Vegas, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 46,049      
Carrying Amount of Land 5,144      
Carrying Amount of Building and Improvements 40,905      
Accumulated Depreciation 2,514      
Seniors Housing Operating | Las Vegas, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 15,509      
Carrying Amount of Land 1,263      
Carrying Amount of Building and Improvements 14,246      
Accumulated Depreciation 806      
Seniors Housing Operating | Las Vegas, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 25,440      
Carrying Amount of Land 2,201      
Carrying Amount of Building and Improvements 23,239      
Accumulated Depreciation 1,352      
Seniors Housing Operating | Laval, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 21,939      
Initial Cost of Land 2,105      
Initial Cost of Building & Improvements 32,161      
Cost Capitalized Subsequent to Acquisition 6,328      
Carrying Amount of Land 2,250      
Carrying Amount of Building and Improvements 38,344      
Accumulated Depreciation 5,879      
Seniors Housing Operating | Laval, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,167      
Initial Cost of Land 2,383      
Initial Cost of Building & Improvements 5,968      
Cost Capitalized Subsequent to Acquisition 1,760      
Carrying Amount of Land 2,548      
Carrying Amount of Building and Improvements 7,563      
Accumulated Depreciation 1,105      
Seniors Housing Operating | Lawrenceville, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Building & Improvements 29,003      
Cost Capitalized Subsequent to Acquisition 833      
Carrying Amount of Land 1,529      
Carrying Amount of Building and Improvements 29,807      
Accumulated Depreciation 8,040      
Seniors Housing Operating | Leatherhead, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,682      
Initial Cost of Building & Improvements 17,835      
Cost Capitalized Subsequent to Acquisition 2,557      
Carrying Amount of Land 5,016      
Carrying Amount of Building and Improvements 20,058      
Accumulated Depreciation 1,982      
Seniors Housing Operating | Leawood, KS        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,490      
Initial Cost of Building & Improvements 32,493      
Cost Capitalized Subsequent to Acquisition 5,960      
Carrying Amount of Land 5,610      
Carrying Amount of Building and Improvements 35,333      
Accumulated Depreciation 9,682      
Seniors Housing Operating | Lecanto, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 200      
Initial Cost of Building & Improvements 6,900      
Cost Capitalized Subsequent to Acquisition 481      
Carrying Amount of Land 218      
Carrying Amount of Building and Improvements 7,363      
Accumulated Depreciation 3,089      
Seniors Housing Operating | Lenexa, KS        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,700      
Initial Cost of Land 826      
Initial Cost of Building & Improvements 26,251      
Cost Capitalized Subsequent to Acquisition 1,511      
Carrying Amount of Land 927      
Carrying Amount of Building and Improvements 27,661      
Accumulated Depreciation 7,971      
Seniors Housing Operating | Lincroft, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9      
Initial Cost of Building & Improvements 19,958      
Cost Capitalized Subsequent to Acquisition 1,933      
Carrying Amount of Land 131      
Carrying Amount of Building and Improvements 21,769      
Accumulated Depreciation 5,983      
Seniors Housing Operating | Linwood, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 800      
Initial Cost of Building & Improvements 21,984      
Cost Capitalized Subsequent to Acquisition 2,050      
Carrying Amount of Land 861      
Carrying Amount of Building and Improvements 23,973      
Accumulated Depreciation 6,397      
Seniors Housing Operating | Litchfield, CT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,240      
Initial Cost of Building & Improvements 17,908      
Cost Capitalized Subsequent to Acquisition 11,751      
Carrying Amount of Land 1,292      
Carrying Amount of Building and Improvements 29,607      
Accumulated Depreciation 6,509      
Seniors Housing Operating | Little Neck, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,350      
Initial Cost of Building & Improvements 38,461      
Cost Capitalized Subsequent to Acquisition 3,204      
Carrying Amount of Land 3,358      
Carrying Amount of Building and Improvements 41,657      
Accumulated Depreciation 10,809      
Seniors Housing Operating | Livingston, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,000      
Initial Cost of Building & Improvements 44,424      
Cost Capitalized Subsequent to Acquisition 1,494      
Carrying Amount of Land 8,017      
Carrying Amount of Building and Improvements 45,901      
Accumulated Depreciation 5,148      
Seniors Housing Operating | Lombard, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,010      
Initial Cost of Land 2,130      
Initial Cost of Building & Improvements 59,943      
Cost Capitalized Subsequent to Acquisition 1,884      
Carrying Amount of Land 2,218      
Carrying Amount of Building and Improvements 61,739      
Accumulated Depreciation 15,787      
Seniors Housing Operating | London, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,121      
Initial Cost of Building & Improvements 10,027      
Cost Capitalized Subsequent to Acquisition 2,450      
Carrying Amount of Land 3,471      
Carrying Amount of Building and Improvements 12,127      
Accumulated Depreciation 2,483      
Seniors Housing Operating | London, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,691      
Initial Cost of Building & Improvements 16,797      
Cost Capitalized Subsequent to Acquisition 2,029      
Carrying Amount of Land 8,238      
Carrying Amount of Building and Improvements 18,279      
Accumulated Depreciation 2,248      
Seniors Housing Operating | London, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 77,904      
Carrying Amount of Land 24,836      
Carrying Amount of Building and Improvements 53,068      
Accumulated Depreciation 1,047      
Seniors Housing Operating | London, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 987      
Initial Cost of Building & Improvements 8,228      
Cost Capitalized Subsequent to Acquisition 1,414      
Carrying Amount of Land 1,105      
Carrying Amount of Building and Improvements 9,524      
Accumulated Depreciation 2,117      
Seniors Housing Operating | London, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,985      
Initial Cost of Land 1,969      
Initial Cost of Building & Improvements 16,985      
Cost Capitalized Subsequent to Acquisition 3,077      
Carrying Amount of Land 2,139      
Carrying Amount of Building and Improvements 19,892      
Accumulated Depreciation 4,256      
Seniors Housing Operating | London, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,445      
Initial Cost of Building & Improvements 13,631      
Cost Capitalized Subsequent to Acquisition 2,339      
Carrying Amount of Land 1,697      
Carrying Amount of Building and Improvements 15,718      
Accumulated Depreciation 3,060      
Seniors Housing Operating | Longueuil, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,891      
Initial Cost of Land 3,992      
Initial Cost of Building & Improvements 23,711      
Cost Capitalized Subsequent to Acquisition 4,942      
Carrying Amount of Land 4,411      
Carrying Amount of Building and Improvements 28,234      
Accumulated Depreciation 6,240      
Seniors Housing Operating | Longview, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 610      
Initial Cost of Building & Improvements 5,520      
Cost Capitalized Subsequent to Acquisition 6      
Carrying Amount of Land 610      
Carrying Amount of Building and Improvements 5,526      
Accumulated Depreciation 2,022      
Seniors Housing Operating | Lorain, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,394      
Initial Cost of Building & Improvements 12,960      
Cost Capitalized Subsequent to Acquisition 23      
Carrying Amount of Land 1,394      
Carrying Amount of Building and Improvements 12,983      
Accumulated Depreciation 763      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 56,950      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 114,438      
Cost Capitalized Subsequent to Acquisition 8,201      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 122,639      
Accumulated Depreciation 34,914      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,540      
Initial Cost of Building & Improvements 19,007      
Cost Capitalized Subsequent to Acquisition 3,979      
Carrying Amount of Land 3,540      
Carrying Amount of Building and Improvements 22,986      
Accumulated Depreciation 6,560      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 28,050      
Cost Capitalized Subsequent to Acquisition 6,009      
Carrying Amount of Land 71      
Carrying Amount of Building and Improvements 33,988      
Accumulated Depreciation 5,570      
Seniors Housing Operating | Louisville, KY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,420      
Initial Cost of Building & Improvements 20,816      
Cost Capitalized Subsequent to Acquisition 3,043      
Carrying Amount of Land 2,420      
Carrying Amount of Building and Improvements 23,859      
Accumulated Depreciation 6,878      
Seniors Housing Operating | Louisville, KY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,650      
Initial Cost of Land 1,600      
Initial Cost of Building & Improvements 20,326      
Cost Capitalized Subsequent to Acquisition 1,150      
Carrying Amount of Land 1,600      
Carrying Amount of Building and Improvements 21,476      
Accumulated Depreciation 6,154      
Seniors Housing Operating | Louisville, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,939      
Initial Cost of Building & Improvements 32,639      
Cost Capitalized Subsequent to Acquisition 1,769      
Carrying Amount of Land 1,939      
Carrying Amount of Building and Improvements 34,408      
Accumulated Depreciation 3,259      
Seniors Housing Operating | Louisville, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,156      
Initial Cost of Building & Improvements 27,170      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,156      
Carrying Amount of Building and Improvements 27,170      
Accumulated Depreciation 1,228      
Seniors Housing Operating | Louisville, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,584      
Initial Cost of Building & Improvements 52,320      
Cost Capitalized Subsequent to Acquisition 6,311      
Carrying Amount of Land 2,584      
Carrying Amount of Building and Improvements 58,631      
Accumulated Depreciation 6,825      
Seniors Housing Operating | Louisville, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,391      
Initial Cost of Building & Improvements 15,783      
Cost Capitalized Subsequent to Acquisition 682      
Carrying Amount of Land 1,391      
Carrying Amount of Building and Improvements 16,465      
Accumulated Depreciation 1,458      
Seniors Housing Operating | Louisville, CO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,332      
Initial Cost of Building & Improvements 44,245      
Cost Capitalized Subsequent to Acquisition 2,681      
Carrying Amount of Land 2,332      
Carrying Amount of Building and Improvements 46,926      
Accumulated Depreciation 4,656      
Seniors Housing Operating | Lynnfield, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,165      
Initial Cost of Building & Improvements 45,200      
Cost Capitalized Subsequent to Acquisition 2,821      
Carrying Amount of Land 3,757      
Carrying Amount of Building and Improvements 47,429      
Accumulated Depreciation 12,922      
Seniors Housing Operating | Mahwah, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,605      
Initial Cost of Building & Improvements 27,249      
Cost Capitalized Subsequent to Acquisition 1,035      
Carrying Amount of Land 1,608      
Carrying Amount of Building and Improvements 28,281      
Accumulated Depreciation 4,051      
Seniors Housing Operating | Malvern, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,651      
Initial Cost of Building & Improvements 17,194      
Cost Capitalized Subsequent to Acquisition 2,407      
Carrying Amount of Land 1,800      
Carrying Amount of Building and Improvements 19,452      
Accumulated Depreciation 6,692      
Seniors Housing Operating | Mansfield, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 660      
Initial Cost of Building & Improvements 5,251      
Cost Capitalized Subsequent to Acquisition 22      
Carrying Amount of Land 660      
Carrying Amount of Building and Improvements 5,273      
Accumulated Depreciation 1,945      
Seniors Housing Operating | Manteca, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,300      
Initial Cost of Building & Improvements 12,125      
Cost Capitalized Subsequent to Acquisition 4,040      
Carrying Amount of Land 1,312      
Carrying Amount of Building and Improvements 16,153      
Accumulated Depreciation 6,471      
Seniors Housing Operating | Maple Ridge, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,171      
Initial Cost of Land 2,875      
Initial Cost of Building & Improvements 11,922      
Cost Capitalized Subsequent to Acquisition 2,060      
Carrying Amount of Land 3,244      
Carrying Amount of Building and Improvements 13,613      
Accumulated Depreciation 2,194      
Seniors Housing Operating | Marieville, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,097      
Initial Cost of Land 1,278      
Initial Cost of Building & Improvements 12,113      
Cost Capitalized Subsequent to Acquisition 1,360      
Carrying Amount of Land 1,414      
Carrying Amount of Building and Improvements 13,337      
Accumulated Depreciation 2,607      
Seniors Housing Operating | Markham, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 50,027      
Initial Cost of Land 3,727      
Initial Cost of Building & Improvements 48,939      
Cost Capitalized Subsequent to Acquisition 5,609      
Carrying Amount of Land 4,002      
Carrying Amount of Building and Improvements 54,273      
Accumulated Depreciation 17,577      
Seniors Housing Operating | Marlboro, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,222      
Initial Cost of Building & Improvements 14,888      
Cost Capitalized Subsequent to Acquisition 1,619      
Carrying Amount of Land 2,268      
Carrying Amount of Building and Improvements 16,461      
Accumulated Depreciation 4,821      
Seniors Housing Operating | Marlow, UKJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,068      
Initial Cost of Building & Improvements 39,720      
Cost Capitalized Subsequent to Acquisition 3,958      
Carrying Amount of Land 9,714      
Carrying Amount of Building and Improvements 43,032      
Accumulated Depreciation 5,502      
Seniors Housing Operating | Marysville, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 620      
Initial Cost of Building & Improvements 4,780      
Cost Capitalized Subsequent to Acquisition 2,520      
Carrying Amount of Land 620      
Carrying Amount of Building and Improvements 7,300      
Accumulated Depreciation 2,747      
Seniors Housing Operating | McKinney, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,570      
Initial Cost of Building & Improvements 7,389      
Cost Capitalized Subsequent to Acquisition 10      
Carrying Amount of Land 1,570      
Carrying Amount of Building and Improvements 7,399      
Accumulated Depreciation 2,312      
Seniors Housing Operating | Medicine Hat, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,235      
Initial Cost of Land 1,432      
Initial Cost of Building & Improvements 14,141      
Cost Capitalized Subsequent to Acquisition 1,245      
Carrying Amount of Land 1,562      
Carrying Amount of Building and Improvements 15,256      
Accumulated Depreciation 4,002      
Seniors Housing Operating | Medina, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,708      
Initial Cost of Building & Improvements 12,049      
Cost Capitalized Subsequent to Acquisition 457      
Carrying Amount of Land 1,708      
Carrying Amount of Building and Improvements 12,506      
Accumulated Depreciation 1,164      
Seniors Housing Operating | Melbourne, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,070      
Initial Cost of Building & Improvements 48,257      
Cost Capitalized Subsequent to Acquisition 44,815      
Carrying Amount of Land 7,070      
Carrying Amount of Building and Improvements 93,072      
Accumulated Depreciation 28,795      
Seniors Housing Operating | Melville, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,280      
Initial Cost of Building & Improvements 73,283      
Cost Capitalized Subsequent to Acquisition 7,588      
Carrying Amount of Land 4,332      
Carrying Amount of Building and Improvements 80,819      
Accumulated Depreciation 20,582      
Seniors Housing Operating | Memphis, TN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,800      
Initial Cost of Building & Improvements 17,744      
Cost Capitalized Subsequent to Acquisition 2,960      
Carrying Amount of Land 1,800      
Carrying Amount of Building and Improvements 20,704      
Accumulated Depreciation 7,011      
Seniors Housing Operating | Menomonee Falls, WI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,020      
Initial Cost of Building & Improvements 6,984      
Cost Capitalized Subsequent to Acquisition 2,307      
Carrying Amount of Land 1,020      
Carrying Amount of Building and Improvements 9,291      
Accumulated Depreciation 2,859      
Seniors Housing Operating | Mesa, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 950      
Initial Cost of Building & Improvements 9,087      
Cost Capitalized Subsequent to Acquisition 3,872      
Carrying Amount of Land 950      
Carrying Amount of Building and Improvements 12,959      
Accumulated Depreciation 6,010      
Seniors Housing Operating | Metairie, LA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,200      
Initial Cost of Land 725      
Initial Cost of Building & Improvements 27,708      
Cost Capitalized Subsequent to Acquisition 1,073      
Carrying Amount of Land 740      
Carrying Amount of Building and Improvements 28,766      
Accumulated Depreciation 7,145      
Seniors Housing Operating | Mill Creek, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 10,150      
Initial Cost of Building & Improvements 60,274      
Cost Capitalized Subsequent to Acquisition 4,074      
Carrying Amount of Land 10,179      
Carrying Amount of Building and Improvements 64,319      
Accumulated Depreciation 21,876      
Seniors Housing Operating | Milton, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 19,529      
Initial Cost of Land 4,542      
Initial Cost of Building & Improvements 25,321      
Cost Capitalized Subsequent to Acquisition 4,439      
Carrying Amount of Land 4,966      
Carrying Amount of Building and Improvements 29,336      
Accumulated Depreciation 4,996      
Seniors Housing Operating | Minnetonka, MN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 920      
Initial Cost of Building & Improvements 29,344      
Cost Capitalized Subsequent to Acquisition 1,269      
Carrying Amount of Land 964      
Carrying Amount of Building and Improvements 30,569      
Accumulated Depreciation 7,644      
Seniors Housing Operating | Mission Viejo, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,280      
Initial Cost of Land 6,600      
Initial Cost of Building & Improvements 52,118      
Cost Capitalized Subsequent to Acquisition 8,559      
Carrying Amount of Land 6,600      
Carrying Amount of Building and Improvements 60,677      
Accumulated Depreciation 10,757      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,313      
Initial Cost of Land 1,602      
Initial Cost of Building & Improvements 17,996      
Cost Capitalized Subsequent to Acquisition 2,245      
Carrying Amount of Land 1,742      
Carrying Amount of Building and Improvements 20,101      
Accumulated Depreciation 5,431      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,802      
Initial Cost of Land 873      
Initial Cost of Building & Improvements 4,655      
Cost Capitalized Subsequent to Acquisition 703      
Carrying Amount of Land 949      
Carrying Amount of Building and Improvements 5,282      
Accumulated Depreciation 1,540      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 26,739      
Initial Cost of Land 3,649      
Initial Cost of Building & Improvements 35,137      
Cost Capitalized Subsequent to Acquisition 4,763      
Carrying Amount of Land 4,004      
Carrying Amount of Building and Improvements 39,545      
Accumulated Depreciation 10,655      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,998      
Initial Cost of Land 2,548      
Initial Cost of Building & Improvements 15,158      
Cost Capitalized Subsequent to Acquisition 3,882      
Carrying Amount of Land 2,767      
Carrying Amount of Building and Improvements 18,821      
Accumulated Depreciation 4,409      
Seniors Housing Operating | Missoula, MT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 550      
Initial Cost of Building & Improvements 7,490      
Cost Capitalized Subsequent to Acquisition 919      
Carrying Amount of Land 553      
Carrying Amount of Building and Improvements 8,406      
Accumulated Depreciation 3,210      
Seniors Housing Operating | Mobberley, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,146      
Initial Cost of Building & Improvements 26,665      
Cost Capitalized Subsequent to Acquisition 4,409      
Carrying Amount of Land 5,728      
Carrying Amount of Building and Improvements 30,492      
Accumulated Depreciation 9,758      
Seniors Housing Operating | Molalla, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 5,468      
Carrying Amount of Land 1,210      
Carrying Amount of Building and Improvements 4,258      
Accumulated Depreciation 4      
Seniors Housing Operating | Monterey, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,440      
Initial Cost of Building & Improvements 29,101      
Cost Capitalized Subsequent to Acquisition 2,865      
Carrying Amount of Land 6,443      
Carrying Amount of Building and Improvements 31,963      
Accumulated Depreciation 8,485      
Seniors Housing Operating | Montgomery, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,482      
Initial Cost of Building & Improvements 83,642      
Cost Capitalized Subsequent to Acquisition 13,251      
Carrying Amount of Land 6,563      
Carrying Amount of Building and Improvements 96,812      
Accumulated Depreciation 15,680      
Seniors Housing Operating | Montgomery Village, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,530      
Initial Cost of Building & Improvements 18,246      
Cost Capitalized Subsequent to Acquisition 7,178      
Carrying Amount of Land 4,291      
Carrying Amount of Building and Improvements 24,663      
Accumulated Depreciation 11,086      
Seniors Housing Operating | Montreal-Nord, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,450      
Initial Cost of Land 4,407      
Initial Cost of Building & Improvements 23,719      
Cost Capitalized Subsequent to Acquisition 10,196      
Carrying Amount of Land 4,713      
Carrying Amount of Building and Improvements 33,609      
Accumulated Depreciation 5,405      
Seniors Housing Operating | Moorestown, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,060      
Initial Cost of Building & Improvements 51,628      
Cost Capitalized Subsequent to Acquisition 7,445      
Carrying Amount of Land 2,095      
Carrying Amount of Building and Improvements 59,038      
Accumulated Depreciation 14,024      
Seniors Housing Operating | Moose Jaw, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,785      
Initial Cost of Land 582      
Initial Cost of Building & Improvements 12,973      
Cost Capitalized Subsequent to Acquisition 2,051      
Carrying Amount of Land 631      
Carrying Amount of Building and Improvements 14,975      
Accumulated Depreciation 3,967      
Seniors Housing Operating | Morton Grove, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,900      
Initial Cost of Building & Improvements 19,374      
Cost Capitalized Subsequent to Acquisition 923      
Carrying Amount of Land 1,900      
Carrying Amount of Building and Improvements 20,297      
Accumulated Depreciation 4,871      
Seniors Housing Operating | Murphy, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,950      
Initial Cost of Building & Improvements 19,182      
Cost Capitalized Subsequent to Acquisition 816      
Carrying Amount of Land 1,950      
Carrying Amount of Building and Improvements 19,998      
Accumulated Depreciation 2,919      
Seniors Housing Operating | Nacogdoches, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 390      
Initial Cost of Building & Improvements 5,754      
Cost Capitalized Subsequent to Acquisition 24      
Carrying Amount of Land 390      
Carrying Amount of Building and Improvements 5,778      
Accumulated Depreciation 2,104      
Seniors Housing Operating | Naperville, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,550      
Initial Cost of Building & Improvements 12,237      
Cost Capitalized Subsequent to Acquisition 2,282      
Carrying Amount of Land 1,550      
Carrying Amount of Building and Improvements 14,519      
Accumulated Depreciation 4,204      
Seniors Housing Operating | Naperville, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Building & Improvements 28,204      
Cost Capitalized Subsequent to Acquisition 1,531      
Carrying Amount of Land 1,593      
Carrying Amount of Building and Improvements 29,682      
Accumulated Depreciation 8,163      
Seniors Housing Operating | Nashville, TN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,900      
Initial Cost of Building & Improvements 35,788      
Cost Capitalized Subsequent to Acquisition 4,426      
Carrying Amount of Land 3,900      
Carrying Amount of Building and Improvements 40,214      
Accumulated Depreciation 12,856      
Seniors Housing Operating | Nepean, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,395      
Initial Cost of Land 1,575      
Initial Cost of Building & Improvements 5,770      
Cost Capitalized Subsequent to Acquisition 1,240      
Carrying Amount of Land 1,735      
Carrying Amount of Building and Improvements 6,850      
Accumulated Depreciation 2,404      
Seniors Housing Operating | New Braunfels, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,200      
Initial Cost of Building & Improvements 19,800      
Cost Capitalized Subsequent to Acquisition 10,442      
Carrying Amount of Land 2,729      
Carrying Amount of Building and Improvements 28,713      
Accumulated Depreciation 6,464      
Seniors Housing Operating | Newbury, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,850      
Initial Cost of Building & Improvements 12,796      
Cost Capitalized Subsequent to Acquisition 2,074      
Carrying Amount of Land 3,156      
Carrying Amount of Building and Improvements 14,564      
Accumulated Depreciation 1,717      
Seniors Housing Operating | Newmarket, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,071      
Initial Cost of Building & Improvements 11,902      
Cost Capitalized Subsequent to Acquisition 3,108      
Carrying Amount of Land 4,529      
Carrying Amount of Building and Improvements 14,552      
Accumulated Depreciation 3,297      
Seniors Housing Operating | Newtown Square, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,930      
Initial Cost of Building & Improvements 14,420      
Cost Capitalized Subsequent to Acquisition 1,686      
Carrying Amount of Land 1,953      
Carrying Amount of Building and Improvements 16,083      
Accumulated Depreciation 5,468      
Seniors Housing Operating | North Tonawanda, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,203      
Initial Cost of Building & Improvements 7,338      
Cost Capitalized Subsequent to Acquisition 600      
Carrying Amount of Land 1,203      
Carrying Amount of Building and Improvements 7,938      
Accumulated Depreciation 1,030      
Seniors Housing Operating | North Tustin, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,880      
Initial Cost of Building & Improvements 18,059      
Cost Capitalized Subsequent to Acquisition 1,037      
Carrying Amount of Land 3,044      
Carrying Amount of Building and Improvements 18,932      
Accumulated Depreciation 4,630      
Seniors Housing Operating | Oak Harbor, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 739      
Initial Cost of Building & Improvements 7,670      
Cost Capitalized Subsequent to Acquisition 448      
Carrying Amount of Land 739      
Carrying Amount of Building and Improvements 8,118      
Accumulated Depreciation 955      
Seniors Housing Operating | Oak Park, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,250      
Initial Cost of Building & Improvements 40,383      
Cost Capitalized Subsequent to Acquisition 3,088      
Carrying Amount of Land 1,250      
Carrying Amount of Building and Improvements 43,471      
Accumulated Depreciation 12,055      
Seniors Housing Operating | Oakdale, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,882      
Initial Cost of Building & Improvements 11,941      
Cost Capitalized Subsequent to Acquisition 880      
Carrying Amount of Land 1,882      
Carrying Amount of Building and Improvements 12,821      
Accumulated Depreciation 1,599      
Seniors Housing Operating | Oakland, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,877      
Initial Cost of Building & Improvements 47,508      
Cost Capitalized Subsequent to Acquisition 3,619      
Carrying Amount of Land 4,117      
Carrying Amount of Building and Improvements 50,887      
Accumulated Depreciation 13,960      
Seniors Housing Operating | Oakton, VA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Building & Improvements 37,576      
Cost Capitalized Subsequent to Acquisition 3,081      
Carrying Amount of Land 2,393      
Carrying Amount of Building and Improvements 40,514      
Accumulated Depreciation 10,712      
Seniors Housing Operating | Oakville, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,533      
Initial Cost of Land 1,252      
Initial Cost of Building & Improvements 7,382      
Cost Capitalized Subsequent to Acquisition 1,157      
Carrying Amount of Land 1,415      
Carrying Amount of Building and Improvements 8,376      
Accumulated Depreciation 2,411      
Seniors Housing Operating | Oakville, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,867      
Initial Cost of Land 2,134      
Initial Cost of Building & Improvements 29,963      
Cost Capitalized Subsequent to Acquisition 4,327      
Carrying Amount of Land 2,324      
Carrying Amount of Building and Improvements 34,100      
Accumulated Depreciation 9,491      
Seniors Housing Operating | Oakville, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,647      
Initial Cost of Land 1,271      
Initial Cost of Building & Improvements 13,754      
Cost Capitalized Subsequent to Acquisition 2,153      
Carrying Amount of Land 1,391      
Carrying Amount of Building and Improvements 15,787      
Accumulated Depreciation 3,939      
Seniors Housing Operating | Ogden, UT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 360      
Initial Cost of Building & Improvements 6,700      
Cost Capitalized Subsequent to Acquisition 1,231      
Carrying Amount of Land 360      
Carrying Amount of Building and Improvements 7,931      
Accumulated Depreciation 3,102      
Seniors Housing Operating | Okotoks, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 19,133      
Initial Cost of Land 714      
Initial Cost of Building & Improvements 20,943      
Cost Capitalized Subsequent to Acquisition 2,436      
Carrying Amount of Land 792      
Carrying Amount of Building and Improvements 23,301      
Accumulated Depreciation 5,018      
Seniors Housing Operating | Orange, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 35,726      
Initial Cost of Land 8,021      
Initial Cost of Building & Improvements 65,189      
Cost Capitalized Subsequent to Acquisition 3,238      
Carrying Amount of Land 8,021      
Carrying Amount of Building and Improvements 68,427      
Accumulated Depreciation 4,046      
Seniors Housing Operating | Oshawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,609      
Initial Cost of Land 841      
Initial Cost of Building & Improvements 7,570      
Cost Capitalized Subsequent to Acquisition 1,302      
Carrying Amount of Land 946      
Carrying Amount of Building and Improvements 8,767      
Accumulated Depreciation 2,445      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,476      
Initial Cost of Land 1,341      
Initial Cost of Building & Improvements 15,425      
Cost Capitalized Subsequent to Acquisition 3,391      
Carrying Amount of Land 1,472      
Carrying Amount of Building and Improvements 18,685      
Accumulated Depreciation 3,179      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,834      
Initial Cost of Land 3,454      
Initial Cost of Building & Improvements 23,309      
Cost Capitalized Subsequent to Acquisition 3,872      
Carrying Amount of Land 3,806      
Carrying Amount of Building and Improvements 26,829      
Accumulated Depreciation 9,183      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 20,373      
Initial Cost of Land 4,256      
Initial Cost of Building & Improvements 39,141      
Cost Capitalized Subsequent to Acquisition 3,116      
Carrying Amount of Land 4,551      
Carrying Amount of Building and Improvements 41,962      
Accumulated Depreciation 7,496      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,076      
Initial Cost of Land 2,103      
Initial Cost of Building & Improvements 18,421      
Cost Capitalized Subsequent to Acquisition 5,833      
Carrying Amount of Land 2,331      
Carrying Amount of Building and Improvements 24,026      
Accumulated Depreciation 4,164      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,466      
Initial Cost of Land 2,963      
Initial Cost of Building & Improvements 26,424      
Cost Capitalized Subsequent to Acquisition 4,433      
Carrying Amount of Land 3,263      
Carrying Amount of Building and Improvements 30,557      
Accumulated Depreciation 5,313      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,169      
Initial Cost of Land 1,561      
Initial Cost of Building & Improvements 18,170      
Cost Capitalized Subsequent to Acquisition 3,517      
Carrying Amount of Land 1,769      
Carrying Amount of Building and Improvements 21,479      
Accumulated Depreciation 3,608      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,374      
Initial Cost of Land 3,403      
Initial Cost of Building & Improvements 31,090      
Cost Capitalized Subsequent to Acquisition 4,858      
Carrying Amount of Land 3,730      
Carrying Amount of Building and Improvements 35,621      
Accumulated Depreciation 5,964      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,052      
Initial Cost of Land 3,411      
Initial Cost of Building & Improvements 28,335      
Cost Capitalized Subsequent to Acquisition 7,114      
Carrying Amount of Land 3,757      
Carrying Amount of Building and Improvements 35,103      
Accumulated Depreciation 7,156      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,750      
Initial Cost of Land 724      
Initial Cost of Building & Improvements 4,710      
Cost Capitalized Subsequent to Acquisition 721      
Carrying Amount of Land 786      
Carrying Amount of Building and Improvements 5,369      
Accumulated Depreciation 1,564      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,001      
Initial Cost of Land 818      
Initial Cost of Building & Improvements 2,165      
Cost Capitalized Subsequent to Acquisition 1,338      
Carrying Amount of Land 740      
Carrying Amount of Building and Improvements 3,581      
Accumulated Depreciation 1,183      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,193      
Initial Cost of Land 2,809      
Initial Cost of Building & Improvements 27,299      
Cost Capitalized Subsequent to Acquisition 3,787      
Carrying Amount of Land 3,030      
Carrying Amount of Building and Improvements 30,865      
Accumulated Depreciation 9,859      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,427      
Initial Cost of Land 1,156      
Initial Cost of Building & Improvements 9,758      
Cost Capitalized Subsequent to Acquisition 1,386      
Carrying Amount of Land 1,283      
Carrying Amount of Building and Improvements 11,017      
Accumulated Depreciation 2,928      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,761      
Initial Cost of Land 746      
Initial Cost of Building & Improvements 7,800      
Cost Capitalized Subsequent to Acquisition 1,471      
Carrying Amount of Land 848      
Carrying Amount of Building and Improvements 9,169      
Accumulated Depreciation 2,411      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,742      
Initial Cost of Land 1,176      
Initial Cost of Building & Improvements 12,764      
Cost Capitalized Subsequent to Acquisition 1,814      
Carrying Amount of Land 1,316      
Carrying Amount of Building and Improvements 14,438      
Accumulated Depreciation 2,769      
Seniors Housing Operating | Outremont, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,538      
Initial Cost of Land 6,746      
Initial Cost of Building & Improvements 45,981      
Cost Capitalized Subsequent to Acquisition 12,666      
Carrying Amount of Land 7,214      
Carrying Amount of Building and Improvements 58,179      
Accumulated Depreciation 9,960      
Seniors Housing Operating | Overland Park, KS        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Building & Improvements 16,269      
Cost Capitalized Subsequent to Acquisition 2,197      
Carrying Amount of Land 1,670      
Carrying Amount of Building and Improvements 18,336      
Accumulated Depreciation 4,577      
Seniors Housing Operating | Palestine, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 180      
Initial Cost of Building & Improvements 4,320      
Cost Capitalized Subsequent to Acquisition 1,328      
Carrying Amount of Land 180      
Carrying Amount of Building and Improvements 5,648      
Accumulated Depreciation 2,083      
Seniors Housing Operating | Palo Alto, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 25,050      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 39,639      
Cost Capitalized Subsequent to Acquisition 3,214      
Carrying Amount of Land 24      
Carrying Amount of Building and Improvements 42,829      
Accumulated Depreciation 11,441      
Seniors Housing Operating | Paramus, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,840      
Initial Cost of Building & Improvements 35,728      
Cost Capitalized Subsequent to Acquisition 2,006      
Carrying Amount of Land 2,986      
Carrying Amount of Building and Improvements 37,588      
Accumulated Depreciation 9,852      
Seniors Housing Operating | Paris, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 490      
Initial Cost of Building & Improvements 5,452      
Cost Capitalized Subsequent to Acquisition 22      
Carrying Amount of Land 490      
Carrying Amount of Building and Improvements 5,474      
Accumulated Depreciation 5,148      
Seniors Housing Operating | Parma, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,533      
Initial Cost of Building & Improvements 9,203      
Cost Capitalized Subsequent to Acquisition 701      
Carrying Amount of Land 1,533      
Carrying Amount of Building and Improvements 9,904      
Accumulated Depreciation 1,254      
Seniors Housing Operating | Paso Robles, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,770      
Initial Cost of Building & Improvements 8,630      
Cost Capitalized Subsequent to Acquisition 2,748      
Carrying Amount of Land 1,770      
Carrying Amount of Building and Improvements 11,378      
Accumulated Depreciation 4,685      
Seniors Housing Operating | Peabody, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,767      
Initial Cost of Land 2,250      
Initial Cost of Building & Improvements 16,071      
Cost Capitalized Subsequent to Acquisition 1,363      
Carrying Amount of Land 2,380      
Carrying Amount of Building and Improvements 17,304      
Accumulated Depreciation 3,859      
Seniors Housing Operating | Pella, IA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 870      
Initial Cost of Building & Improvements 6,716      
Cost Capitalized Subsequent to Acquisition 218      
Carrying Amount of Land 886      
Carrying Amount of Building and Improvements 6,918      
Accumulated Depreciation 1,408      
Seniors Housing Operating | Pembroke, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,931      
Initial Cost of Building & Improvements 9,427      
Cost Capitalized Subsequent to Acquisition 1,341      
Carrying Amount of Land 2,032      
Carrying Amount of Building and Improvements 10,667      
Accumulated Depreciation 2,922      
Seniors Housing Operating | Pennington, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,380      
Initial Cost of Building & Improvements 27,620      
Cost Capitalized Subsequent to Acquisition 1,557      
Carrying Amount of Land 1,507      
Carrying Amount of Building and Improvements 29,050      
Accumulated Depreciation 7,227      
Seniors Housing Operating | Peoria, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 766      
Initial Cost of Building & Improvements 21,796      
Cost Capitalized Subsequent to Acquisition 1,552      
Carrying Amount of Land 766      
Carrying Amount of Building and Improvements 23,348      
Accumulated Depreciation 3,314      
Seniors Housing Operating | Pittsburgh, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Building & Improvements 18,017      
Cost Capitalized Subsequent to Acquisition 11,751      
Carrying Amount of Land 1,587      
Carrying Amount of Building and Improvements 29,761      
Accumulated Depreciation 5,750      
Seniors Housing Operating | Placentia, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,480      
Initial Cost of Building & Improvements 17,076      
Cost Capitalized Subsequent to Acquisition 6,087      
Carrying Amount of Land 8,513      
Carrying Amount of Building and Improvements 23,130      
Accumulated Depreciation 5,396      
Seniors Housing Operating | Plainview, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,066      
Initial Cost of Building & Improvements 19,901      
Cost Capitalized Subsequent to Acquisition 1,261      
Carrying Amount of Land 3,182      
Carrying Amount of Building and Improvements 21,046      
Accumulated Depreciation 5,342      
Seniors Housing Operating | Plano, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 28,960      
Initial Cost of Land 3,120      
Initial Cost of Building & Improvements 59,950      
Cost Capitalized Subsequent to Acquisition 4,143      
Carrying Amount of Land 3,231      
Carrying Amount of Building and Improvements 63,982      
Accumulated Depreciation 20,101      
Seniors Housing Operating | Plano, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Building & Improvements 15,390      
Cost Capitalized Subsequent to Acquisition 1,545      
Carrying Amount of Land 1,750      
Carrying Amount of Building and Improvements 16,935      
Accumulated Depreciation 2,292      
Seniors Housing Operating | Playa Vista, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Building & Improvements 40,531      
Cost Capitalized Subsequent to Acquisition 3,340      
Carrying Amount of Land 1,677      
Carrying Amount of Building and Improvements 43,774      
Accumulated Depreciation 11,332      
Seniors Housing Operating | Pleasanton, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 52,006      
Carrying Amount of Land 3,676      
Carrying Amount of Building and Improvements 48,330      
Accumulated Depreciation 2,838      
Seniors Housing Operating | Port Perry, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,811      
Initial Cost of Land 3,685      
Initial Cost of Building & Improvements 26,788      
Cost Capitalized Subsequent to Acquisition 4,729      
Carrying Amount of Land 4,001      
Carrying Amount of Building and Improvements 31,201      
Accumulated Depreciation 5,078      
Seniors Housing Operating | Port St. Lucie, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,700      
Initial Cost of Building & Improvements 47,230      
Cost Capitalized Subsequent to Acquisition 21,304      
Carrying Amount of Land 8,700      
Carrying Amount of Building and Improvements 68,534      
Accumulated Depreciation 21,013      
Seniors Housing Operating | Portage, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 42,000      
Initial Cost of Land 2,880      
Initial Cost of Building & Improvements 59,955      
Cost Capitalized Subsequent to Acquisition 2,569      
Carrying Amount of Land 2,880      
Carrying Amount of Building and Improvements 62,524      
Accumulated Depreciation 5,885      
Seniors Housing Operating | Princeton, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Building & Improvements 30,888      
Cost Capitalized Subsequent to Acquisition 2,325      
Carrying Amount of Land 1,814      
Carrying Amount of Building and Improvements 33,129      
Accumulated Depreciation 8,500      
Seniors Housing Operating | Princeton, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 189      
Carrying Amount of Land 0      
Carrying Amount of Building and Improvements 189      
Accumulated Depreciation 0      
Seniors Housing Operating | Purley, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,365      
Initial Cost of Building & Improvements 35,161      
Cost Capitalized Subsequent to Acquisition 5,941      
Carrying Amount of Land 8,218      
Carrying Amount of Building and Improvements 40,249      
Accumulated Depreciation 11,730      
Seniors Housing Operating | Puyallup, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,150      
Initial Cost of Building & Improvements 20,776      
Cost Capitalized Subsequent to Acquisition 2,348      
Carrying Amount of Land 1,156      
Carrying Amount of Building and Improvements 23,118      
Accumulated Depreciation 7,047      
Seniors Housing Operating | Quebec City, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,816      
Initial Cost of Land 2,420      
Initial Cost of Building & Improvements 21,977      
Cost Capitalized Subsequent to Acquisition 4,060      
Carrying Amount of Land 2,588      
Carrying Amount of Building and Improvements 25,869      
Accumulated Depreciation 3,705      
Seniors Housing Operating | Quebec City, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,074      
Initial Cost of Land 3,300      
Initial Cost of Building & Improvements 28,325      
Cost Capitalized Subsequent to Acquisition 6,353      
Carrying Amount of Land 3,529      
Carrying Amount of Building and Improvements 34,449      
Accumulated Depreciation 4,722      
Seniors Housing Operating | Queensbury, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,260      
Initial Cost of Building & Improvements 21,744      
Cost Capitalized Subsequent to Acquisition 1,451      
Carrying Amount of Land 1,273      
Carrying Amount of Building and Improvements 23,182      
Accumulated Depreciation 3,907      
Seniors Housing Operating | Rancho Cucamonga, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,480      
Initial Cost of Building & Improvements 10,055      
Cost Capitalized Subsequent to Acquisition 2,295      
Carrying Amount of Land 2,084      
Carrying Amount of Building and Improvements 11,746      
Accumulated Depreciation 3,834      
Seniors Housing Operating | Rancho Palos Verdes, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,450      
Initial Cost of Building & Improvements 60,034      
Cost Capitalized Subsequent to Acquisition 6,368      
Carrying Amount of Land 5,450      
Carrying Amount of Building and Improvements 66,402      
Accumulated Depreciation 17,880      
Seniors Housing Operating | Randolph, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 29,300      
Initial Cost of Land 1,540      
Initial Cost of Building & Improvements 46,934      
Cost Capitalized Subsequent to Acquisition 2,416      
Carrying Amount of Land 1,718      
Carrying Amount of Building and Improvements 49,172      
Accumulated Depreciation 12,543      
Seniors Housing Operating | Red Deer, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,346      
Initial Cost of Land 1,247      
Initial Cost of Building & Improvements 19,283      
Cost Capitalized Subsequent to Acquisition 3,064      
Carrying Amount of Land 1,368      
Carrying Amount of Building and Improvements 22,226      
Accumulated Depreciation 4,375      
Seniors Housing Operating | Red Deer, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,526      
Initial Cost of Land 1,199      
Initial Cost of Building & Improvements 22,339      
Cost Capitalized Subsequent to Acquisition 3,883      
Carrying Amount of Land 1,296      
Carrying Amount of Building and Improvements 26,125      
Accumulated Depreciation 5,200      
Seniors Housing Operating | Redding, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 26,446      
Initial Cost of Land 4,474      
Initial Cost of Building & Improvements 36,828      
Cost Capitalized Subsequent to Acquisition 2,161      
Carrying Amount of Land 4,474      
Carrying Amount of Building and Improvements 38,989      
Accumulated Depreciation 2,943      
Seniors Housing Operating | Regina, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,975      
Initial Cost of Land 1,485      
Initial Cost of Building & Improvements 21,148      
Cost Capitalized Subsequent to Acquisition 2,613      
Carrying Amount of Land 1,705      
Carrying Amount of Building and Improvements 23,541      
Accumulated Depreciation 6,840      
Seniors Housing Operating | Regina, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,983      
Initial Cost of Land 1,244      
Initial Cost of Building & Improvements 21,036      
Cost Capitalized Subsequent to Acquisition 2,612      
Carrying Amount of Land 1,357      
Carrying Amount of Building and Improvements 23,535      
Accumulated Depreciation 6,124      
Seniors Housing Operating | Regina, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,178      
Initial Cost of Land 1,539      
Initial Cost of Building & Improvements 24,053      
Cost Capitalized Subsequent to Acquisition 5,214      
Carrying Amount of Land 1,678      
Carrying Amount of Building and Improvements 29,128      
Accumulated Depreciation 5,238      
Seniors Housing Operating | Rehoboth Beach, DE        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Building & Improvements 24,248      
Cost Capitalized Subsequent to Acquisition 9,327      
Carrying Amount of Land 993      
Carrying Amount of Building and Improvements 33,542      
Accumulated Depreciation 7,929      
Seniors Housing Operating | Reno, NV        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,060      
Initial Cost of Building & Improvements 11,440      
Cost Capitalized Subsequent to Acquisition 1,529      
Carrying Amount of Land 1,060      
Carrying Amount of Building and Improvements 12,969      
Accumulated Depreciation 5,138      
Seniors Housing Operating | Ridgeland, MS        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 520      
Initial Cost of Building & Improvements 7,675      
Cost Capitalized Subsequent to Acquisition 2,051      
Carrying Amount of Land 520      
Carrying Amount of Building and Improvements 9,726      
Accumulated Depreciation 3,732      
Seniors Housing Operating | Riviere-du-Loup, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,733      
Initial Cost of Land 592      
Initial Cost of Building & Improvements 7,601      
Cost Capitalized Subsequent to Acquisition 1,592      
Carrying Amount of Land 694      
Carrying Amount of Building and Improvements 9,091      
Accumulated Depreciation 1,704      
Seniors Housing Operating | Riviere-du-Loup, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,015      
Initial Cost of Land 1,454      
Initial Cost of Building & Improvements 16,848      
Cost Capitalized Subsequent to Acquisition 5,728      
Carrying Amount of Land 1,847      
Carrying Amount of Building and Improvements 22,183      
Accumulated Depreciation 5,068      
Seniors Housing Operating | Rocky Hill, CT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,090      
Initial Cost of Building & Improvements 6,710      
Cost Capitalized Subsequent to Acquisition 4,381      
Carrying Amount of Land 1,132      
Carrying Amount of Building and Improvements 11,049      
Accumulated Depreciation 3,613      
Seniors Housing Operating | Rohnert Park, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,500      
Initial Cost of Building & Improvements 18,700      
Cost Capitalized Subsequent to Acquisition 4,467      
Carrying Amount of Land 6,546      
Carrying Amount of Building and Improvements 23,121      
Accumulated Depreciation 9,016      
Seniors Housing Operating | Romeoville, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 854      
Initial Cost of Building & Improvements 12,646      
Cost Capitalized Subsequent to Acquisition 61,940      
Carrying Amount of Land 6,197      
Carrying Amount of Building and Improvements 69,243      
Accumulated Depreciation 20,699      
Seniors Housing Operating | Roseville, MN        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Building & Improvements 35,877      
Cost Capitalized Subsequent to Acquisition 1,318      
Carrying Amount of Land 1,648      
Carrying Amount of Building and Improvements 37,087      
Accumulated Depreciation 9,191      
Seniors Housing Operating | Roseville, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,300      
Initial Cost of Building & Improvements 41,652      
Cost Capitalized Subsequent to Acquisition 6,978      
Carrying Amount of Land 3,300      
Carrying Amount of Building and Improvements 48,630      
Accumulated Depreciation 9,235      
Seniors Housing Operating | Roswell, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,107      
Initial Cost of Building & Improvements 9,627      
Cost Capitalized Subsequent to Acquisition 3,277      
Carrying Amount of Land 1,114      
Carrying Amount of Building and Improvements 12,897      
Accumulated Depreciation 8,730      
Seniors Housing Operating | Roswell, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,080      
Initial Cost of Building & Improvements 6,486      
Cost Capitalized Subsequent to Acquisition 3,577      
Carrying Amount of Land 2,380      
Carrying Amount of Building and Improvements 9,763      
Accumulated Depreciation 2,377      
Seniors Housing Operating | Rowlett, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,610      
Initial Cost of Building & Improvements 21,254      
Cost Capitalized Subsequent to Acquisition 223      
Carrying Amount of Land 1,610      
Carrying Amount of Building and Improvements 21,477      
Accumulated Depreciation 176      
Seniors Housing Operating | Sabre Springs, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 46,910      
Carrying Amount of Land 3,726      
Carrying Amount of Building and Improvements 43,184      
Accumulated Depreciation 2,326      
Seniors Housing Operating | Sacramento, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 940      
Initial Cost of Building & Improvements 14,781      
Cost Capitalized Subsequent to Acquisition 1,759      
Carrying Amount of Land 952      
Carrying Amount of Building and Improvements 16,528      
Accumulated Depreciation 4,994      
Seniors Housing Operating | Sacramento, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,300      
Initial Cost of Building & Improvements 23,394      
Cost Capitalized Subsequent to Acquisition 1,761      
Carrying Amount of Land 1,369      
Carrying Amount of Building and Improvements 25,086      
Accumulated Depreciation 6,572      
Seniors Housing Operating | Saint-Lambert, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 33,489      
Initial Cost of Land 10,259      
Initial Cost of Building & Improvements 61,903      
Cost Capitalized Subsequent to Acquisition 9,649      
Carrying Amount of Land 11,208      
Carrying Amount of Building and Improvements 70,603      
Accumulated Depreciation 18,472      
Seniors Housing Operating | Salem, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 11,341      
Carrying Amount of Land 916      
Carrying Amount of Building and Improvements 10,425      
Accumulated Depreciation 5      
Seniors Housing Operating | Salem, OR        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 10,531      
Carrying Amount of Land 1,227      
Carrying Amount of Building and Improvements 9,304      
Accumulated Depreciation 5      
Seniors Housing Operating | Salinas, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,110      
Initial Cost of Building & Improvements 41,424      
Cost Capitalized Subsequent to Acquisition 11,019      
Carrying Amount of Land 5,150      
Carrying Amount of Building and Improvements 52,403      
Accumulated Depreciation 10,619      
Seniors Housing Operating | Salisbury, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Building & Improvements 15,269      
Cost Capitalized Subsequent to Acquisition 2,299      
Carrying Amount of Land 3,012      
Carrying Amount of Building and Improvements 17,276      
Accumulated Depreciation 3,176      
Seniors Housing Operating | Salt Lake City, UT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,360      
Initial Cost of Building & Improvements 19,691      
Cost Capitalized Subsequent to Acquisition 946      
Carrying Amount of Land 1,360      
Carrying Amount of Building and Improvements 20,637      
Accumulated Depreciation 7,187      
Seniors Housing Operating | San Antonio, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,120      
Initial Cost of Building & Improvements 28,169      
Cost Capitalized Subsequent to Acquisition 2,656      
Carrying Amount of Land 6,120      
Carrying Amount of Building and Improvements 30,825      
Accumulated Depreciation 7,825      
Seniors Housing Operating | San Antonio, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,045      
Initial Cost of Building & Improvements 58,048      
Cost Capitalized Subsequent to Acquisition 3,275      
Carrying Amount of Land 5,045      
Carrying Amount of Building and Improvements 61,323      
Accumulated Depreciation 8,159      
Seniors Housing Operating | San Antonio, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,686      
Initial Cost of Building & Improvements 69,620      
Cost Capitalized Subsequent to Acquisition 3,634      
Carrying Amount of Land 11,686      
Carrying Amount of Building and Improvements 73,254      
Accumulated Depreciation 6,766      
Seniors Housing Operating | San Diego, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,810      
Initial Cost of Building & Improvements 63,078      
Cost Capitalized Subsequent to Acquisition 4,276      
Carrying Amount of Land 5,810      
Carrying Amount of Building and Improvements 67,354      
Accumulated Depreciation 20,890      
Seniors Housing Operating | San Diego, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,000      
Initial Cost of Building & Improvements 27,164      
Cost Capitalized Subsequent to Acquisition 1,576      
Carrying Amount of Land 3,016      
Carrying Amount of Building and Improvements 28,724      
Accumulated Depreciation 7,069      
Seniors Housing Operating | San Diego, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 29,359      
Initial Cost of Land 4,179      
Initial Cost of Building & Improvements 40,607      
Cost Capitalized Subsequent to Acquisition 1,920      
Carrying Amount of Land 4,179      
Carrying Amount of Building and Improvements 42,527      
Accumulated Depreciation 2,939      
Seniors Housing Operating | San Francisco, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,920      
Initial Cost of Building & Improvements 91,639      
Cost Capitalized Subsequent to Acquisition 13,785      
Carrying Amount of Land 5,920      
Carrying Amount of Building and Improvements 105,424      
Accumulated Depreciation 20,404      
Seniors Housing Operating | San Francisco, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,800      
Initial Cost of Building & Improvements 77,214      
Cost Capitalized Subsequent to Acquisition 10,544      
Carrying Amount of Land 11,800      
Carrying Amount of Building and Improvements 87,758      
Accumulated Depreciation 16,961      
Seniors Housing Operating | San Gabriel, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,120      
Initial Cost of Building & Improvements 15,566      
Cost Capitalized Subsequent to Acquisition 1,204      
Carrying Amount of Land 3,165      
Carrying Amount of Building and Improvements 16,725      
Accumulated Depreciation 4,715      
Seniors Housing Operating | San Jose, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,280      
Initial Cost of Building & Improvements 46,823      
Cost Capitalized Subsequent to Acquisition 4,443      
Carrying Amount of Land 3,280      
Carrying Amount of Building and Improvements 51,266      
Accumulated Depreciation 14,267      
Seniors Housing Operating | San Jose, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,900      
Initial Cost of Building & Improvements 27,647      
Cost Capitalized Subsequent to Acquisition 5,369      
Carrying Amount of Land 11,966      
Carrying Amount of Building and Improvements 32,950      
Accumulated Depreciation 6,795      
Seniors Housing Operating | San Rafael, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,620      
Initial Cost of Building & Improvements 27,392      
Cost Capitalized Subsequent to Acquisition 4,109      
Carrying Amount of Land 1,860      
Carrying Amount of Building and Improvements 31,261      
Accumulated Depreciation 5,333      
Seniors Housing Operating | San Ramon, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,700      
Initial Cost of Building & Improvements 72,223      
Cost Capitalized Subsequent to Acquisition 10,149      
Carrying Amount of Land 8,768      
Carrying Amount of Building and Improvements 82,304      
Accumulated Depreciation 15,770      
Seniors Housing Operating | Sandy Springs, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,214      
Initial Cost of Building & Improvements 8,360      
Cost Capitalized Subsequent to Acquisition 1,541      
Carrying Amount of Land 2,220      
Carrying Amount of Building and Improvements 9,895      
Accumulated Depreciation 3,551      
Seniors Housing Operating | Santa Monica, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,820      
Initial Cost of Land 5,250      
Initial Cost of Building & Improvements 28,340      
Cost Capitalized Subsequent to Acquisition 1,166      
Carrying Amount of Land 5,266      
Carrying Amount of Building and Improvements 29,490      
Accumulated Depreciation 7,717      
Seniors Housing Operating | Santa Rosa, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Building & Improvements 26,273      
Cost Capitalized Subsequent to Acquisition 3,761      
Carrying Amount of Land 2,292      
Carrying Amount of Building and Improvements 29,992      
Accumulated Depreciation 5,429      
Seniors Housing Operating | Saskatoon, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,686      
Initial Cost of Land 981      
Initial Cost of Building & Improvements 13,905      
Cost Capitalized Subsequent to Acquisition 1,961      
Carrying Amount of Land 1,064      
Carrying Amount of Building and Improvements 15,783      
Accumulated Depreciation 3,927      
Seniors Housing Operating | Saskatoon, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,136      
Initial Cost of Land 1,382      
Initial Cost of Building & Improvements 17,609      
Cost Capitalized Subsequent to Acquisition 2,564      
Carrying Amount of Land 1,568      
Carrying Amount of Building and Improvements 19,987      
Accumulated Depreciation 4,858      
Seniors Housing Operating | Schaumburg, IL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,460      
Initial Cost of Building & Improvements 22,863      
Cost Capitalized Subsequent to Acquisition 1,454      
Carrying Amount of Land 2,497      
Carrying Amount of Building and Improvements 24,280      
Accumulated Depreciation 7,172      
Seniors Housing Operating | Scottsdale, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,500      
Initial Cost of Building & Improvements 3,890      
Cost Capitalized Subsequent to Acquisition 1,505      
Carrying Amount of Land 2,500      
Carrying Amount of Building and Improvements 5,395      
Accumulated Depreciation 1,692      
Seniors Housing Operating | Scranton, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 875      
Initial Cost of Building & Improvements 10,562      
Cost Capitalized Subsequent to Acquisition 695      
Carrying Amount of Land 875      
Carrying Amount of Building and Improvements 11,257      
Accumulated Depreciation 1,288      
Seniors Housing Operating | Seal Beach, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,204      
Initial Cost of Building & Improvements 72,954      
Cost Capitalized Subsequent to Acquisition 3,165      
Carrying Amount of Land 6,271      
Carrying Amount of Building and Improvements 76,052      
Accumulated Depreciation 23,111      
Seniors Housing Operating | Seattle, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,190      
Initial Cost of Building & Improvements 9,350      
Cost Capitalized Subsequent to Acquisition 2,031      
Carrying Amount of Land 5,199      
Carrying Amount of Building and Improvements 11,372      
Accumulated Depreciation 4,231      
Seniors Housing Operating | Seattle, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 27,180      
Initial Cost of Land 10,670      
Initial Cost of Building & Improvements 37,291      
Cost Capitalized Subsequent to Acquisition 2,007      
Carrying Amount of Land 10,700      
Carrying Amount of Building and Improvements 39,268      
Accumulated Depreciation 14,211      
Seniors Housing Operating | Seattle, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,150      
Initial Cost of Building & Improvements 19,887      
Cost Capitalized Subsequent to Acquisition 2,790      
Carrying Amount of Land 1,153      
Carrying Amount of Building and Improvements 22,674      
Accumulated Depreciation 4,109      
Seniors Housing Operating | Selbyville, DE        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 750      
Initial Cost of Building & Improvements 25,912      
Cost Capitalized Subsequent to Acquisition 964      
Carrying Amount of Land 769      
Carrying Amount of Building and Improvements 26,857      
Accumulated Depreciation 7,050      
Seniors Housing Operating | Sevenoaks, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,181      
Initial Cost of Building & Improvements 40,240      
Cost Capitalized Subsequent to Acquisition 8,029      
Carrying Amount of Land 6,844      
Carrying Amount of Building and Improvements 47,606      
Accumulated Depreciation 14,328      
Seniors Housing Operating | Severna Park, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 67,623      
Cost Capitalized Subsequent to Acquisition 6,130      
Carrying Amount of Land 44      
Carrying Amount of Building and Improvements 73,709      
Accumulated Depreciation 12,815      
Seniors Housing Operating | Shelby Township, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,180      
Initial Cost of Land 1,040      
Initial Cost of Building & Improvements 26,344      
Cost Capitalized Subsequent to Acquisition 1,477      
Carrying Amount of Land 1,110      
Carrying Amount of Building and Improvements 27,751      
Accumulated Depreciation 7,250      
Seniors Housing Operating | Sherman, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 700      
Initial Cost of Building & Improvements 5,221      
Cost Capitalized Subsequent to Acquisition 7      
Carrying Amount of Land 700      
Carrying Amount of Building and Improvements 5,228      
Accumulated Depreciation 1,979      
Seniors Housing Operating | Shrewsbury, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,120      
Initial Cost of Building & Improvements 38,116      
Cost Capitalized Subsequent to Acquisition 2,750      
Carrying Amount of Land 2,151      
Carrying Amount of Building and Improvements 40,835      
Accumulated Depreciation 10,565      
Seniors Housing Operating | Sidcup, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,446      
Initial Cost of Building & Improvements 56,570      
Cost Capitalized Subsequent to Acquisition 8,847      
Carrying Amount of Land 8,272      
Carrying Amount of Building and Improvements 64,591      
Accumulated Depreciation 19,813      
Seniors Housing Operating | Silver Spring, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 64,377      
Carrying Amount of Land 3,436      
Carrying Amount of Building and Improvements 60,941      
Accumulated Depreciation 3,256      
Seniors Housing Operating | Simi Valley, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,200      
Initial Cost of Building & Improvements 16,664      
Cost Capitalized Subsequent to Acquisition 1,938      
Carrying Amount of Land 3,298      
Carrying Amount of Building and Improvements 18,504      
Accumulated Depreciation 5,955      
Seniors Housing Operating | Simi Valley, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,510      
Initial Cost of Building & Improvements 51,406      
Cost Capitalized Subsequent to Acquisition 8,517      
Carrying Amount of Land 5,510      
Carrying Amount of Building and Improvements 59,923      
Accumulated Depreciation 12,238      
Seniors Housing Operating | Solihull, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,070      
Initial Cost of Building & Improvements 43,297      
Cost Capitalized Subsequent to Acquisition 9,048      
Carrying Amount of Land 5,615      
Carrying Amount of Building and Improvements 51,800      
Accumulated Depreciation 14,877      
Seniors Housing Operating | Solihull, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,571      
Initial Cost of Building & Improvements 26,053      
Cost Capitalized Subsequent to Acquisition 3,942      
Carrying Amount of Land 4,009      
Carrying Amount of Building and Improvements 29,557      
Accumulated Depreciation 8,354      
Seniors Housing Operating | Solihull, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,851      
Initial Cost of Building & Improvements 10,585      
Cost Capitalized Subsequent to Acquisition 2,023      
Carrying Amount of Land 2,049      
Carrying Amount of Building and Improvements 12,410      
Accumulated Depreciation 1,547      
Seniors Housing Operating | Sonning, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,644      
Initial Cost of Building & Improvements 42,155      
Cost Capitalized Subsequent to Acquisition 6,442      
Carrying Amount of Land 6,280      
Carrying Amount of Building and Improvements 47,961      
Accumulated Depreciation 12,724      
Seniors Housing Operating | Sonoma, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,100      
Initial Cost of Building & Improvements 18,400      
Cost Capitalized Subsequent to Acquisition 4,807      
Carrying Amount of Land 1,109      
Carrying Amount of Building and Improvements 23,198      
Accumulated Depreciation 8,685      
Seniors Housing Operating | Sonoma, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,820      
Initial Cost of Building & Improvements 21,890      
Cost Capitalized Subsequent to Acquisition 3,292      
Carrying Amount of Land 2,827      
Carrying Amount of Building and Improvements 25,175      
Accumulated Depreciation 4,594      
Seniors Housing Operating | South Jordan, UT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 51,165      
Carrying Amount of Land 4,639      
Carrying Amount of Building and Improvements 46,526      
Accumulated Depreciation 2,705      
Seniors Housing Operating | Southlake, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,207      
Initial Cost of Building & Improvements 56,655      
Cost Capitalized Subsequent to Acquisition 7,624      
Carrying Amount of Land 6,207      
Carrying Amount of Building and Improvements 64,279      
Accumulated Depreciation 7,920      
Seniors Housing Operating | Spokane, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,200      
Initial Cost of Building & Improvements 25,064      
Cost Capitalized Subsequent to Acquisition 2,502      
Carrying Amount of Land 3,200      
Carrying Amount of Building and Improvements 27,566      
Accumulated Depreciation 8,323      
Seniors Housing Operating | Spokane, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,580      
Initial Cost of Building & Improvements 25,342      
Cost Capitalized Subsequent to Acquisition 2,298      
Carrying Amount of Land 2,580      
Carrying Amount of Building and Improvements 27,640      
Accumulated Depreciation 7,353      
Seniors Housing Operating | St. Albert, AB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,268      
Initial Cost of Land 1,145      
Initial Cost of Building & Improvements 17,863      
Cost Capitalized Subsequent to Acquisition 2,257      
Carrying Amount of Land 1,285      
Carrying Amount of Building and Improvements 19,980      
Accumulated Depreciation 6,301      
Seniors Housing Operating | St. John's, NL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,219      
Initial Cost of Land 706      
Initial Cost of Building & Improvements 11,765      
Cost Capitalized Subsequent to Acquisition 900      
Carrying Amount of Land 760      
Carrying Amount of Building and Improvements 12,611      
Accumulated Depreciation 2,110      
Seniors Housing Operating | Stittsville, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,057      
Initial Cost of Land 1,175      
Initial Cost of Building & Improvements 17,397      
Cost Capitalized Subsequent to Acquisition 2,258      
Carrying Amount of Land 1,346      
Carrying Amount of Building and Improvements 19,484      
Accumulated Depreciation 4,876      
Seniors Housing Operating | Stockport, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,369      
Initial Cost of Building & Improvements 25,018      
Cost Capitalized Subsequent to Acquisition 3,888      
Carrying Amount of Land 4,860      
Carrying Amount of Building and Improvements 28,415      
Accumulated Depreciation 8,513      
Seniors Housing Operating | Stockton, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,280      
Initial Cost of Building & Improvements 5,983      
Cost Capitalized Subsequent to Acquisition 1,718      
Carrying Amount of Land 2,372      
Carrying Amount of Building and Improvements 7,609      
Accumulated Depreciation 2,527      
Seniors Housing Operating | Strongsville, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,113      
Initial Cost of Building & Improvements 10,904      
Cost Capitalized Subsequent to Acquisition 656      
Carrying Amount of Land 1,113      
Carrying Amount of Building and Improvements 11,560      
Accumulated Depreciation 1,451      
Seniors Housing Operating | Stuart, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,276      
Initial Cost of Building & Improvements 23,980      
Cost Capitalized Subsequent to Acquisition 730      
Carrying Amount of Land 5,276      
Carrying Amount of Building and Improvements 24,710      
Accumulated Depreciation 1,762      
Seniors Housing Operating | Studio City, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,006      
Initial Cost of Building & Improvements 25,307      
Cost Capitalized Subsequent to Acquisition 1,401      
Carrying Amount of Land 4,115      
Carrying Amount of Building and Improvements 26,599      
Accumulated Depreciation 7,825      
Seniors Housing Operating | Suffield, CT        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,416      
Initial Cost of Building & Improvements 31,176      
Cost Capitalized Subsequent to Acquisition 2,392      
Carrying Amount of Land 4,416      
Carrying Amount of Building and Improvements 33,568      
Accumulated Depreciation 3,369      
Seniors Housing Operating | Sugar Land, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Building & Improvements 31,423      
Cost Capitalized Subsequent to Acquisition 1,184      
Carrying Amount of Land 960      
Carrying Amount of Building and Improvements 32,607      
Accumulated Depreciation 9,638      
Seniors Housing Operating | Sugar Land, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,272      
Initial Cost of Building & Improvements 60,493      
Cost Capitalized Subsequent to Acquisition 6,546      
Carrying Amount of Land 4,272      
Carrying Amount of Building and Improvements 67,039      
Accumulated Depreciation 11,697      
Seniors Housing Operating | Summit, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,080      
Initial Cost of Building & Improvements 14,152      
Cost Capitalized Subsequent to Acquisition 506      
Carrying Amount of Land 3,080      
Carrying Amount of Building and Improvements 14,658      
Accumulated Depreciation 3,817      
Seniors Housing Operating | Sun City West, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,250      
Initial Cost of Building & Improvements 21,778      
Cost Capitalized Subsequent to Acquisition 1,973      
Carrying Amount of Land 1,250      
Carrying Amount of Building and Improvements 23,751      
Accumulated Depreciation 5,755      
Seniors Housing Operating | Sunninghill, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,632      
Initial Cost of Building & Improvements 42,233      
Cost Capitalized Subsequent to Acquisition 4,116      
Carrying Amount of Land 12,460      
Carrying Amount of Building and Improvements 45,521      
Accumulated Depreciation 4,347      
Seniors Housing Operating | Sunnyvale, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,420      
Initial Cost of Building & Improvements 41,682      
Cost Capitalized Subsequent to Acquisition 3,191      
Carrying Amount of Land 5,420      
Carrying Amount of Building and Improvements 44,873      
Accumulated Depreciation 12,824      
Seniors Housing Operating | Surrey, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,069      
Initial Cost of Land 3,605      
Initial Cost of Building & Improvements 18,818      
Cost Capitalized Subsequent to Acquisition 3,107      
Carrying Amount of Land 3,907      
Carrying Amount of Building and Improvements 21,623      
Accumulated Depreciation 7,209      
Seniors Housing Operating | Surrey, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,070      
Initial Cost of Land 4,552      
Initial Cost of Building & Improvements 22,338      
Cost Capitalized Subsequent to Acquisition 3,865      
Carrying Amount of Land 4,952      
Carrying Amount of Building and Improvements 25,803      
Accumulated Depreciation 9,069      
Seniors Housing Operating | Sutton, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,096      
Initial Cost of Building & Improvements 14,532      
Cost Capitalized Subsequent to Acquisition 3,309      
Carrying Amount of Land 4,538      
Carrying Amount of Building and Improvements 17,399      
Accumulated Depreciation 1,941      
Seniors Housing Operating | Suwanee, GA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,560      
Initial Cost of Building & Improvements 11,538      
Cost Capitalized Subsequent to Acquisition 1,672      
Carrying Amount of Land 1,560      
Carrying Amount of Building and Improvements 13,210      
Accumulated Depreciation 4,220      
Seniors Housing Operating | Sway, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,145      
Initial Cost of Building & Improvements 15,508      
Cost Capitalized Subsequent to Acquisition 3,024      
Carrying Amount of Land 4,643      
Carrying Amount of Building and Improvements 18,034      
Accumulated Depreciation 4,402      
Seniors Housing Operating | Swift Current, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,624      
Initial Cost of Land 492      
Initial Cost of Building & Improvements 10,119      
Cost Capitalized Subsequent to Acquisition 1,412      
Carrying Amount of Land 540      
Carrying Amount of Building and Improvements 11,483      
Accumulated Depreciation 3,057      
Seniors Housing Operating | Sylvania, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,205      
Initial Cost of Building & Improvements 11,988      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,205      
Carrying Amount of Building and Improvements 11,988      
Accumulated Depreciation 730      
Seniors Housing Operating | Syracuse, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,418      
Initial Cost of Building & Improvements 11,617      
Cost Capitalized Subsequent to Acquisition 863      
Carrying Amount of Land 1,418      
Carrying Amount of Building and Improvements 12,480      
Accumulated Depreciation 1,544      
Seniors Housing Operating | Tacoma, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,170      
Initial Cost of Building & Improvements 73,377      
Cost Capitalized Subsequent to Acquisition 17,896      
Carrying Amount of Land 4,170      
Carrying Amount of Building and Improvements 91,273      
Accumulated Depreciation 20,323      
Seniors Housing Operating | Taylor, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,910      
Initial Cost of Building & Improvements 11,996      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,910      
Carrying Amount of Building and Improvements 11,996      
Accumulated Depreciation 434      
Seniors Housing Operating | The Woodlands, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Building & Improvements 12,379      
Cost Capitalized Subsequent to Acquisition 663      
Carrying Amount of Land 480      
Carrying Amount of Building and Improvements 13,042      
Accumulated Depreciation 3,755      
Seniors Housing Operating | Toms River, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,610      
Initial Cost of Building & Improvements 34,627      
Cost Capitalized Subsequent to Acquisition 1,518      
Carrying Amount of Land 1,695      
Carrying Amount of Building and Improvements 36,060      
Accumulated Depreciation 9,559      
Seniors Housing Operating | Tonawanda, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,542      
Initial Cost of Building & Improvements 13,280      
Cost Capitalized Subsequent to Acquisition 1,252      
Carrying Amount of Land 1,542      
Carrying Amount of Building and Improvements 14,532      
Accumulated Depreciation 1,927      
Seniors Housing Operating | Tonawanda, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,436      
Initial Cost of Building & Improvements 12,507      
Cost Capitalized Subsequent to Acquisition 1,428      
Carrying Amount of Land 2,436      
Carrying Amount of Building and Improvements 13,935      
Accumulated Depreciation 1,991      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 18,270      
Initial Cost of Land 2,927      
Initial Cost of Building & Improvements 20,713      
Cost Capitalized Subsequent to Acquisition 4,407      
Carrying Amount of Land 3,209      
Carrying Amount of Building and Improvements 24,838      
Accumulated Depreciation 4,394      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,502      
Initial Cost of Land 5,082      
Initial Cost of Building & Improvements 25,493      
Cost Capitalized Subsequent to Acquisition 4,045      
Carrying Amount of Land 5,531      
Carrying Amount of Building and Improvements 29,089      
Accumulated Depreciation 7,178      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,566      
Initial Cost of Land 2,008      
Initial Cost of Building & Improvements 19,620      
Cost Capitalized Subsequent to Acquisition 1,826      
Carrying Amount of Land 2,123      
Carrying Amount of Building and Improvements 21,331      
Accumulated Depreciation 4,384      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 36,318      
Initial Cost of Land 5,132      
Initial Cost of Building & Improvements 41,657      
Cost Capitalized Subsequent to Acquisition 7,211      
Carrying Amount of Land 5,591      
Carrying Amount of Building and Improvements 48,409      
Accumulated Depreciation 13,447      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,586      
Initial Cost of Land 2,480      
Initial Cost of Building & Improvements 7,571      
Cost Capitalized Subsequent to Acquisition 1,381      
Carrying Amount of Land 2,693      
Carrying Amount of Building and Improvements 8,739      
Accumulated Depreciation 2,385      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,640      
Initial Cost of Land 1,079      
Initial Cost of Building & Improvements 5,364      
Cost Capitalized Subsequent to Acquisition 877      
Carrying Amount of Land 1,135      
Carrying Amount of Building and Improvements 6,185      
Accumulated Depreciation 1,702      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,273      
Initial Cost of Land 2,513      
Initial Cost of Building & Improvements 19,695      
Cost Capitalized Subsequent to Acquisition 2,668      
Carrying Amount of Land 2,763      
Carrying Amount of Building and Improvements 22,113      
Accumulated Depreciation 5,163      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,430      
Initial Cost of Land 3,400      
Initial Cost of Building & Improvements 32,757      
Cost Capitalized Subsequent to Acquisition 4,542      
Carrying Amount of Land 3,797      
Carrying Amount of Building and Improvements 36,902      
Accumulated Depreciation 10,244      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,719      
Initial Cost of Land 1,447      
Initial Cost of Building & Improvements 3,918      
Cost Capitalized Subsequent to Acquisition 871      
Carrying Amount of Land 1,598      
Carrying Amount of Building and Improvements 4,638      
Accumulated Depreciation 1,556      
Seniors Housing Operating | Toronto, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 30,720      
Initial Cost of Land 5,304      
Initial Cost of Building & Improvements 53,488      
Cost Capitalized Subsequent to Acquisition 5,453      
Carrying Amount of Land 5,791      
Carrying Amount of Building and Improvements 58,454      
Accumulated Depreciation 19,389      
Seniors Housing Operating | Torrance, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,497      
Initial Cost of Building & Improvements 73,138      
Cost Capitalized Subsequent to Acquisition 297      
Carrying Amount of Land 3,504      
Carrying Amount of Building and Improvements 73,428      
Accumulated Depreciation 8,315      
Seniors Housing Operating | Tucson, AZ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 830      
Initial Cost of Building & Improvements 6,179      
Cost Capitalized Subsequent to Acquisition 5,317      
Carrying Amount of Land 830      
Carrying Amount of Building and Improvements 11,496      
Accumulated Depreciation 2,496      
Seniors Housing Operating | Tulsa, OK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,330      
Initial Cost of Building & Improvements 21,285      
Cost Capitalized Subsequent to Acquisition 2,094      
Carrying Amount of Land 1,362      
Carrying Amount of Building and Improvements 23,347      
Accumulated Depreciation 9,163      
Seniors Housing Operating | Tulsa, OK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Building & Improvements 20,728      
Cost Capitalized Subsequent to Acquisition 114      
Carrying Amount of Land 1,614      
Carrying Amount of Building and Improvements 20,728      
Accumulated Depreciation 8,988      
Seniors Housing Operating | Turlock, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,266      
Initial Cost of Building & Improvements 12,869      
Cost Capitalized Subsequent to Acquisition 1,122      
Carrying Amount of Land 2,266      
Carrying Amount of Building and Improvements 13,991      
Accumulated Depreciation 1,748      
Seniors Housing Operating | Twinsburg, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,042      
Initial Cost of Building & Improvements 8,343      
Cost Capitalized Subsequent to Acquisition 543      
Carrying Amount of Land 1,042      
Carrying Amount of Building and Improvements 8,886      
Accumulated Depreciation 1,162      
Seniors Housing Operating | Tyler, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 650      
Initial Cost of Building & Improvements 5,268      
Cost Capitalized Subsequent to Acquisition 24      
Carrying Amount of Land 650      
Carrying Amount of Building and Improvements 5,292      
Accumulated Depreciation 1,937      
Seniors Housing Operating | Upland, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,160      
Initial Cost of Building & Improvements 42,596      
Cost Capitalized Subsequent to Acquisition 98      
Carrying Amount of Land 3,160      
Carrying Amount of Building and Improvements 42,694      
Accumulated Depreciation 7,628      
Seniors Housing Operating | Upper Providence, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,900      
Initial Cost of Building & Improvements 28,195      
Cost Capitalized Subsequent to Acquisition 489      
Carrying Amount of Land 1,906      
Carrying Amount of Building and Improvements 28,678      
Accumulated Depreciation 4,254      
Seniors Housing Operating | Upper St Claire, PA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,102      
Initial Cost of Building & Improvements 13,455      
Cost Capitalized Subsequent to Acquisition 1,668      
Carrying Amount of Land 1,153      
Carrying Amount of Building and Improvements 15,072      
Accumulated Depreciation 4,718      
Seniors Housing Operating | Vacaville, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 900      
Initial Cost of Building & Improvements 17,100      
Cost Capitalized Subsequent to Acquisition 3,978      
Carrying Amount of Land 900      
Carrying Amount of Building and Improvements 21,078      
Accumulated Depreciation 8,261      
Seniors Housing Operating | Vallejo, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,000      
Initial Cost of Building & Improvements 18,000      
Cost Capitalized Subsequent to Acquisition 5,193      
Carrying Amount of Land 4,030      
Carrying Amount of Building and Improvements 23,163      
Accumulated Depreciation 8,965      
Seniors Housing Operating | Vallejo, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,330      
Initial Cost of Building & Improvements 15,407      
Cost Capitalized Subsequent to Acquisition 1,667      
Carrying Amount of Land 2,330      
Carrying Amount of Building and Improvements 17,074      
Accumulated Depreciation 5,368      
Seniors Housing Operating | Vancouver, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,820      
Initial Cost of Building & Improvements 19,042      
Cost Capitalized Subsequent to Acquisition 1,271      
Carrying Amount of Land 1,821      
Carrying Amount of Building and Improvements 20,312      
Accumulated Depreciation 6,357      
Seniors Housing Operating | Vancouver, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,282      
Initial Cost of Building & Improvements 6,572      
Cost Capitalized Subsequent to Acquisition 2,428      
Carrying Amount of Land 7,787      
Carrying Amount of Building and Improvements 8,495      
Accumulated Depreciation 5,968      
Seniors Housing Operating | Vancouver, WA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 16,606      
Carrying Amount of Land 1,406      
Carrying Amount of Building and Improvements 15,200      
Accumulated Depreciation 6      
Seniors Housing Operating | Vankleek Hill, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 542      
Initial Cost of Land 389      
Initial Cost of Building & Improvements 2,960      
Cost Capitalized Subsequent to Acquisition 628      
Carrying Amount of Land 426      
Carrying Amount of Building and Improvements 3,551      
Accumulated Depreciation 1,072      
Seniors Housing Operating | Vaudreuil, QC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,888      
Initial Cost of Land 1,852      
Initial Cost of Building & Improvements 14,214      
Cost Capitalized Subsequent to Acquisition 2,062      
Carrying Amount of Land 1,956      
Carrying Amount of Building and Improvements 16,172      
Accumulated Depreciation 3,404      
Seniors Housing Operating | Vero Beach, FL        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,930      
Initial Cost of Building & Improvements 40,070      
Cost Capitalized Subsequent to Acquisition 26,571      
Carrying Amount of Land 2,930      
Carrying Amount of Building and Improvements 66,641      
Accumulated Depreciation 28,297      
Seniors Housing Operating | Victoria, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,629      
Initial Cost of Land 2,856      
Initial Cost of Building & Improvements 18,038      
Cost Capitalized Subsequent to Acquisition 2,320      
Carrying Amount of Land 3,121      
Carrying Amount of Building and Improvements 20,093      
Accumulated Depreciation 6,029      
Seniors Housing Operating | Victoria, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 18,976      
Initial Cost of Land 3,681      
Initial Cost of Building & Improvements 15,774      
Cost Capitalized Subsequent to Acquisition 2,184      
Carrying Amount of Land 3,997      
Carrying Amount of Building and Improvements 17,642      
Accumulated Depreciation 5,490      
Seniors Housing Operating | Victoria, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,634      
Initial Cost of Land 2,476      
Initial Cost of Building & Improvements 15,379      
Cost Capitalized Subsequent to Acquisition 2,695      
Carrying Amount of Land 2,718      
Carrying Amount of Building and Improvements 17,832      
Accumulated Depreciation 3,245      
Seniors Housing Operating | Virginia Water, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,106      
Initial Cost of Building & Improvements 29,937      
Cost Capitalized Subsequent to Acquisition 9,185      
Carrying Amount of Land 6,029      
Carrying Amount of Building and Improvements 40,199      
Accumulated Depreciation 13,356      
Seniors Housing Operating | Voorhees, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,700      
Initial Cost of Building & Improvements 24,312      
Cost Capitalized Subsequent to Acquisition 2,565      
Carrying Amount of Land 3,854      
Carrying Amount of Building and Improvements 26,723      
Accumulated Depreciation 5,739      
Seniors Housing Operating | Wall, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,650      
Initial Cost of Building & Improvements 25,350      
Cost Capitalized Subsequent to Acquisition 3,045      
Carrying Amount of Land 1,694      
Carrying Amount of Building and Improvements 28,351      
Accumulated Depreciation 7,011      
Seniors Housing Operating | Walnut Creek, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,700      
Initial Cost of Building & Improvements 12,467      
Cost Capitalized Subsequent to Acquisition 3,583      
Carrying Amount of Land 3,808      
Carrying Amount of Building and Improvements 15,942      
Accumulated Depreciation 5,189      
Seniors Housing Operating | Walnut Creek, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 10,320      
Initial Cost of Building & Improvements 100,890      
Cost Capitalized Subsequent to Acquisition 18,335      
Carrying Amount of Land 10,320      
Carrying Amount of Building and Improvements 119,225      
Accumulated Depreciation 24,385      
Seniors Housing Operating | Washington, DC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,000      
Initial Cost of Building & Improvements 69,154      
Cost Capitalized Subsequent to Acquisition 3,369      
Carrying Amount of Land 4,021      
Carrying Amount of Building and Improvements 72,502      
Accumulated Depreciation 18,471      
Seniors Housing Operating | Watchung, NJ        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,920      
Initial Cost of Building & Improvements 24,880      
Cost Capitalized Subsequent to Acquisition 2,084      
Carrying Amount of Land 2,058      
Carrying Amount of Building and Improvements 26,826      
Accumulated Depreciation 6,743      
Seniors Housing Operating | Waterville, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Building & Improvements 0      
Cost Capitalized Subsequent to Acquisition 48,130      
Carrying Amount of Land 2,566      
Carrying Amount of Building and Improvements 45,564      
Accumulated Depreciation 217      
Seniors Housing Operating | Waukee, IA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,870      
Initial Cost of Building & Improvements 31,878      
Cost Capitalized Subsequent to Acquisition 1,042      
Carrying Amount of Land 1,900      
Carrying Amount of Building and Improvements 32,890      
Accumulated Depreciation 6,744      
Seniors Housing Operating | Waxahachie, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 650      
Initial Cost of Building & Improvements 5,763      
Cost Capitalized Subsequent to Acquisition 10      
Carrying Amount of Land 650      
Carrying Amount of Building and Improvements 5,773      
Accumulated Depreciation 1,997      
Seniors Housing Operating | Wayland, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,207      
Initial Cost of Building & Improvements 27,462      
Cost Capitalized Subsequent to Acquisition 2,437      
Carrying Amount of Land 1,364      
Carrying Amount of Building and Improvements 29,742      
Accumulated Depreciation 8,380      
Seniors Housing Operating | Weatherford, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 660      
Initial Cost of Building & Improvements 5,261      
Cost Capitalized Subsequent to Acquisition 7      
Carrying Amount of Land 660      
Carrying Amount of Building and Improvements 5,268      
Accumulated Depreciation 1,949      
Seniors Housing Operating | Webster Groves, MO        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,790      
Initial Cost of Building & Improvements 15,425      
Cost Capitalized Subsequent to Acquisition 2,711      
Carrying Amount of Land 1,812      
Carrying Amount of Building and Improvements 18,114      
Accumulated Depreciation 5,560      
Seniors Housing Operating | Welland, ON        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,769      
Initial Cost of Land 983      
Initial Cost of Building & Improvements 7,530      
Cost Capitalized Subsequent to Acquisition 1,086      
Carrying Amount of Land 1,060      
Carrying Amount of Building and Improvements 8,539      
Accumulated Depreciation 1,525      
Seniors Housing Operating | Wellesley, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,690      
Initial Cost of Building & Improvements 77,462      
Cost Capitalized Subsequent to Acquisition 571      
Carrying Amount of Land 4,690      
Carrying Amount of Building and Improvements 78,033      
Accumulated Depreciation 15,666      
Seniors Housing Operating | West Babylon, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,960      
Initial Cost of Building & Improvements 47,085      
Cost Capitalized Subsequent to Acquisition 2,671      
Carrying Amount of Land 4,062      
Carrying Amount of Building and Improvements 49,654      
Accumulated Depreciation 12,541      
Seniors Housing Operating | West Bloomfield, MI        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Building & Improvements 12,300      
Cost Capitalized Subsequent to Acquisition 945      
Carrying Amount of Land 1,100      
Carrying Amount of Building and Improvements 13,185      
Accumulated Depreciation 3,728      
Seniors Housing Operating | West Chester Township, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,281      
Initial Cost of Building & Improvements 47,848      
Cost Capitalized Subsequent to Acquisition 1,288      
Carrying Amount of Land 2,281      
Carrying Amount of Building and Improvements 49,136      
Accumulated Depreciation 317      
Seniors Housing Operating | West Hills, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,600      
Initial Cost of Building & Improvements 7,521      
Cost Capitalized Subsequent to Acquisition 1,760      
Carrying Amount of Land 2,658      
Carrying Amount of Building and Improvements 9,223      
Accumulated Depreciation 3,344      
Seniors Housing Operating | West Seneca, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,413      
Initial Cost of Building & Improvements 6,626      
Cost Capitalized Subsequent to Acquisition 634      
Carrying Amount of Land 1,413      
Carrying Amount of Building and Improvements 7,260      
Accumulated Depreciation 1,080      
Seniors Housing Operating | West Seneca, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,042      
Initial Cost of Building & Improvements 7,475      
Cost Capitalized Subsequent to Acquisition 604      
Carrying Amount of Land 1,042      
Carrying Amount of Building and Improvements 8,079      
Accumulated Depreciation 1,036      
Seniors Housing Operating | West Vancouver, BC        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,543      
Initial Cost of Land 7,059      
Initial Cost of Building & Improvements 28,155      
Cost Capitalized Subsequent to Acquisition 5,580      
Carrying Amount of Land 7,717      
Carrying Amount of Building and Improvements 33,077      
Accumulated Depreciation 9,434      
Seniors Housing Operating | Westbourne, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,441      
Initial Cost of Building & Improvements 41,420      
Cost Capitalized Subsequent to Acquisition 10,347      
Carrying Amount of Land 6,027      
Carrying Amount of Building and Improvements 51,181      
Accumulated Depreciation 12,905      
Seniors Housing Operating | Westford, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,440      
Initial Cost of Building & Improvements 32,607      
Cost Capitalized Subsequent to Acquisition 463      
Carrying Amount of Land 1,468      
Carrying Amount of Building and Improvements 33,042      
Accumulated Depreciation 5,977      
Seniors Housing Operating | Weston, MA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,160      
Initial Cost of Building & Improvements 2,750      
Cost Capitalized Subsequent to Acquisition 268      
Carrying Amount of Land 1,160      
Carrying Amount of Building and Improvements 3,018      
Accumulated Depreciation 1,347      
Seniors Housing Operating | Westworth Village, TX        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,060      
Initial Cost of Building & Improvements 31,296      
Cost Capitalized Subsequent to Acquisition 86      
Carrying Amount of Land 2,060      
Carrying Amount of Building and Improvements 31,382      
Accumulated Depreciation 4,994      
Seniors Housing Operating | Weybridge, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,899      
Initial Cost of Building & Improvements 48,240      
Cost Capitalized Subsequent to Acquisition 6,767      
Carrying Amount of Land 8,784      
Carrying Amount of Building and Improvements 54,122      
Accumulated Depreciation 15,969      
Seniors Housing Operating | Weymouth, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,591      
Initial Cost of Building & Improvements 16,551      
Cost Capitalized Subsequent to Acquisition 2,540      
Carrying Amount of Land 2,908      
Carrying Amount of Building and Improvements 18,774      
Accumulated Depreciation 3,380      
Seniors Housing Operating | White Oak, MD        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,304      
Initial Cost of Building & Improvements 24,768      
Cost Capitalized Subsequent to Acquisition 3,092      
Carrying Amount of Land 2,437      
Carrying Amount of Building and Improvements 27,727      
Accumulated Depreciation 7,122      
Seniors Housing Operating | Whitesboro, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,587      
Initial Cost of Building & Improvements 11,946      
Cost Capitalized Subsequent to Acquisition 789      
Carrying Amount of Land 1,587      
Carrying Amount of Building and Improvements 12,735      
Accumulated Depreciation 1,487      
Seniors Housing Operating | Willoughby, OH        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,309      
Initial Cost of Building & Improvements 10,536      
Cost Capitalized Subsequent to Acquisition 662      
Carrying Amount of Land 1,309      
Carrying Amount of Building and Improvements 11,198      
Accumulated Depreciation 1,279      
Seniors Housing Operating | Wilmington, DE        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Building & Improvements 23,338      
Cost Capitalized Subsequent to Acquisition 2,395      
Carrying Amount of Land 1,176      
Carrying Amount of Building and Improvements 25,597      
Accumulated Depreciation 6,754      
Seniors Housing Operating | Winchester, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,009      
Initial Cost of Building & Improvements 29,405      
Cost Capitalized Subsequent to Acquisition 4,451      
Carrying Amount of Land 6,671      
Carrying Amount of Building and Improvements 33,194      
Accumulated Depreciation 9,383      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,271      
Initial Cost of Land 1,960      
Initial Cost of Building & Improvements 38,612      
Cost Capitalized Subsequent to Acquisition 7,129      
Carrying Amount of Land 2,217      
Carrying Amount of Building and Improvements 45,484      
Accumulated Depreciation 15,196      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 25,011      
Initial Cost of Land 1,276      
Initial Cost of Building & Improvements 21,732      
Cost Capitalized Subsequent to Acquisition 3,371      
Carrying Amount of Land 1,664      
Carrying Amount of Building and Improvements 24,715      
Accumulated Depreciation 6,421      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,084      
Initial Cost of Land 1,317      
Initial Cost of Building & Improvements 15,609      
Cost Capitalized Subsequent to Acquisition 3,641      
Carrying Amount of Land 1,450      
Carrying Amount of Building and Improvements 19,117      
Accumulated Depreciation 4,278      
Seniors Housing Operating | Woking, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,990      
Initial Cost of Building & Improvements 12,523      
Cost Capitalized Subsequent to Acquisition 1,598      
Carrying Amount of Land 3,210      
Carrying Amount of Building and Improvements 13,901      
Accumulated Depreciation 1,234      
Seniors Housing Operating | Wolverhampton, UK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,941      
Initial Cost of Building & Improvements 8,922      
Cost Capitalized Subsequent to Acquisition 1,846      
Carrying Amount of Land 3,264      
Carrying Amount of Building and Improvements 10,445      
Accumulated Depreciation 4,030      
Seniors Housing Operating | Woodland Hills, CA        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,400      
Initial Cost of Building & Improvements 20,478      
Cost Capitalized Subsequent to Acquisition 1,441      
Carrying Amount of Land 3,456      
Carrying Amount of Building and Improvements 21,863      
Accumulated Depreciation 6,494      
Seniors Housing Operating | Yonkers, NY        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,962      
Initial Cost of Building & Improvements 50,107      
Cost Capitalized Subsequent to Acquisition 2,471      
Carrying Amount of Land 4,047      
Carrying Amount of Building and Improvements 52,493      
Accumulated Depreciation 13,792      
Seniors Housing Operating | Yorkton, SK        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,996      
Initial Cost of Land 463      
Initial Cost of Building & Improvements 8,760      
Cost Capitalized Subsequent to Acquisition 1,100      
Carrying Amount of Land 504      
Carrying Amount of Building and Improvements 9,819      
Accumulated Depreciation $ 2,663