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Schedule III - Real Estate and Accumulated Depreciation (Seniors Housing) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,485,711      
Initial Cost of Land 3,141,623      
Initial Cost of Buildings & Improvements 28,882,284      
Cost Capitalized Subsequent to Acquisition 1,868,125      
Carrying Amount of Land 3,205,091      
Carrying Amount of Buildings and Improvements 30,385,297      
Accumulated Depreciation 5,499,958 $ 4,838,370 $ 4,093,494 $ 3,796,297
Seniors Housing Operating        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,810,587      
Initial Cost of Land 1,331,171      
Initial Cost of Buildings & Improvements 14,047,033      
Cost Capitalized Subsequent to Acquisition 1,206,757      
Carrying Amount of Land 1,373,258      
Carrying Amount of Buildings and Improvements 15,211,900      
Accumulated Depreciation 2,962,334      
Seniors Housing Operating | Acton, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 31,346      
Cost Capitalized Subsequent to Acquisition 1,691      
Carrying Amount of Land 24      
Carrying Amount of Buildings and Improvements 33,013      
Accumulated Depreciation 6,127      
Seniors Housing Operating | Adderbury, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,144      
Initial Cost of Buildings & Improvements 12,549      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,144      
Carrying Amount of Buildings and Improvements 12,549      
Accumulated Depreciation 621      
Seniors Housing Operating | Albuquerque, NM        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,270      
Initial Cost of Buildings & Improvements 20,837      
Cost Capitalized Subsequent to Acquisition 2,139      
Carrying Amount of Land 1,354      
Carrying Amount of Buildings and Improvements 22,892      
Accumulated Depreciation 6,475      
Seniors Housing Operating | Alexandria, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,280      
Initial Cost of Buildings & Improvements 50,914      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 8,280      
Carrying Amount of Buildings and Improvements 50,914      
Accumulated Depreciation 1,055      
Seniors Housing Operating | Alhambra, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 6,305      
Cost Capitalized Subsequent to Acquisition 9,067      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 15,372      
Accumulated Depreciation 2,124      
Seniors Housing Operating | Altrincham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,244      
Initial Cost of Buildings & Improvements 25,187      
Cost Capitalized Subsequent to Acquisition 1,700      
Carrying Amount of Land 4,388      
Carrying Amount of Buildings and Improvements 26,743      
Accumulated Depreciation 5,790      
Seniors Housing Operating | Amherstview, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 486      
Initial Cost of Land 473      
Initial Cost of Buildings & Improvements 4,446      
Cost Capitalized Subsequent to Acquisition 508      
Carrying Amount of Land 493      
Carrying Amount of Buildings and Improvements 4,934      
Accumulated Depreciation 799      
Seniors Housing Operating | Anderson, SC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 710      
Initial Cost of Buildings & Improvements 6,290      
Cost Capitalized Subsequent to Acquisition 456      
Carrying Amount of Land 710      
Carrying Amount of Buildings and Improvements 6,746      
Accumulated Depreciation 3,524      
Seniors Housing Operating | Apple Valley, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 16,639      
Cost Capitalized Subsequent to Acquisition 262      
Carrying Amount of Land 486      
Carrying Amount of Buildings and Improvements 16,895      
Accumulated Depreciation 4,633      
Seniors Housing Operating | Arlington, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,385      
Initial Cost of Buildings & Improvements 31,198      
Cost Capitalized Subsequent to Acquisition 14,030      
Carrying Amount of Land 8,385      
Carrying Amount of Buildings and Improvements 45,228      
Accumulated Depreciation 6,530      
Seniors Housing Operating | Arlington, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 2,338      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 2,338      
Accumulated Depreciation 89      
Seniors Housing Operating | Arnprior, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 147      
Initial Cost of Land 788      
Initial Cost of Buildings & Improvements 6,283      
Cost Capitalized Subsequent to Acquisition 422      
Carrying Amount of Land 810      
Carrying Amount of Buildings and Improvements 6,683      
Accumulated Depreciation 1,505      
Seniors Housing Operating | Atlanta, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,100      
Initial Cost of Buildings & Improvements 20,603      
Cost Capitalized Subsequent to Acquisition 1,532      
Carrying Amount of Land 2,197      
Carrying Amount of Buildings and Improvements 22,038      
Accumulated Depreciation 4,140      
Seniors Housing Operating | Austin, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,560      
Initial Cost of Buildings & Improvements 21,413      
Cost Capitalized Subsequent to Acquisition 511      
Carrying Amount of Land 1,560      
Carrying Amount of Buildings and Improvements 21,924      
Accumulated Depreciation 2,984      
Seniors Housing Operating | Austin, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,200      
Initial Cost of Buildings & Improvements 74,850      
Cost Capitalized Subsequent to Acquisition 746      
Carrying Amount of Land 4,200      
Carrying Amount of Buildings and Improvements 75,596      
Accumulated Depreciation 8,063      
Seniors Housing Operating | Avon, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,550      
Initial Cost of Buildings & Improvements 30,571      
Cost Capitalized Subsequent to Acquisition 4,211      
Carrying Amount of Land 1,590      
Carrying Amount of Buildings and Improvements 34,742      
Accumulated Depreciation 10,488      
Seniors Housing Operating | Azusa, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 570      
Initial Cost of Buildings & Improvements 3,141      
Cost Capitalized Subsequent to Acquisition 7,872      
Carrying Amount of Land 570      
Carrying Amount of Buildings and Improvements 11,013      
Accumulated Depreciation 3,286      
Seniors Housing Operating | Bagshot, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,960      
Initial Cost of Buildings & Improvements 29,881      
Cost Capitalized Subsequent to Acquisition 2,920      
Carrying Amount of Land 5,133      
Carrying Amount of Buildings and Improvements 32,628      
Accumulated Depreciation 7,189      
Seniors Housing Operating | Banstead, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,695      
Initial Cost of Buildings & Improvements 55,113      
Cost Capitalized Subsequent to Acquisition 4,444      
Carrying Amount of Land 6,956      
Carrying Amount of Buildings and Improvements 59,296      
Accumulated Depreciation 12,237      
Seniors Housing Operating | Basingstoke, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,420      
Initial Cost of Buildings & Improvements 18,853      
Cost Capitalized Subsequent to Acquisition 1,014      
Carrying Amount of Land 3,535      
Carrying Amount of Buildings and Improvements 19,752      
Accumulated Depreciation 2,578      
Seniors Housing Operating | Basking Ridge, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,356      
Initial Cost of Buildings & Improvements 37,710      
Cost Capitalized Subsequent to Acquisition 1,623      
Carrying Amount of Land 2,395      
Carrying Amount of Buildings and Improvements 39,294      
Accumulated Depreciation 8,040      
Seniors Housing Operating | Bassett, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,874      
Initial Cost of Buildings & Improvements 32,304      
Cost Capitalized Subsequent to Acquisition 4,413      
Carrying Amount of Land 5,051      
Carrying Amount of Buildings and Improvements 36,540      
Accumulated Depreciation 8,138      
Seniors Housing Operating | Bath, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,696      
Initial Cost of Buildings & Improvements 11,876      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,696      
Carrying Amount of Buildings and Improvements 11,876      
Accumulated Depreciation 571      
Seniors Housing Operating | Baton Rouge, LA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,838      
Initial Cost of Land 790      
Initial Cost of Buildings & Improvements 29,436      
Cost Capitalized Subsequent to Acquisition 1,139      
Carrying Amount of Land 842      
Carrying Amount of Buildings and Improvements 30,523      
Accumulated Depreciation 6,086      
Seniors Housing Operating | Beaconsfield, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,566      
Initial Cost of Buildings & Improvements 50,952      
Cost Capitalized Subsequent to Acquisition 2,287      
Carrying Amount of Land 5,765      
Carrying Amount of Buildings and Improvements 53,040      
Accumulated Depreciation 10,591      
Seniors Housing Operating | Beaconsfield, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,149      
Initial Cost of Buildings & Improvements 17,484      
Cost Capitalized Subsequent to Acquisition 641      
Carrying Amount of Land 1,225      
Carrying Amount of Buildings and Improvements 18,049      
Accumulated Depreciation 4,937      
Seniors Housing Operating | Bedford, NH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,527      
Initial Cost of Buildings & Improvements 28,748      
Cost Capitalized Subsequent to Acquisition 2,299      
Carrying Amount of Land 2,551      
Carrying Amount of Buildings and Improvements 31,023      
Accumulated Depreciation 5,760      
Seniors Housing Operating | Bee Cave, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 21,084      
Cost Capitalized Subsequent to Acquisition 819      
Carrying Amount of Land 1,820      
Carrying Amount of Buildings and Improvements 21,903      
Accumulated Depreciation 2,369      
Seniors Housing Operating | Bellevue, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,800      
Initial Cost of Buildings & Improvements 19,004      
Cost Capitalized Subsequent to Acquisition 2,183      
Carrying Amount of Land 2,816      
Carrying Amount of Buildings and Improvements 21,171      
Accumulated Depreciation 5,325      
Seniors Housing Operating | Belmont, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,000      
Initial Cost of Buildings & Improvements 23,526      
Cost Capitalized Subsequent to Acquisition 2,395      
Carrying Amount of Land 3,000      
Carrying Amount of Buildings and Improvements 25,921      
Accumulated Depreciation 6,832      
Seniors Housing Operating | Belmont, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 35,300      
Cost Capitalized Subsequent to Acquisition 2,308      
Carrying Amount of Land 157      
Carrying Amount of Buildings and Improvements 37,451      
Accumulated Depreciation 8,026      
Seniors Housing Operating | Berkeley, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,195      
Initial Cost of Land 3,050      
Initial Cost of Buildings & Improvements 32,677      
Cost Capitalized Subsequent to Acquisition 5,086      
Carrying Amount of Land 3,050      
Carrying Amount of Buildings and Improvements 37,763      
Accumulated Depreciation 4,759      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 45,309      
Cost Capitalized Subsequent to Acquisition 677      
Carrying Amount of Land 3      
Carrying Amount of Buildings and Improvements 45,983      
Accumulated Depreciation 9,551      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 45      
Cost Capitalized Subsequent to Acquisition 682      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 727      
Accumulated Depreciation 136      
Seniors Housing Operating | Bethesda, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 212      
Cost Capitalized Subsequent to Acquisition 907      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 1,119      
Accumulated Depreciation 319      
Seniors Housing Operating | Billerica, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,619      
Initial Cost of Buildings & Improvements 21,381      
Cost Capitalized Subsequent to Acquisition 867      
Carrying Amount of Land 1,624      
Carrying Amount of Buildings and Improvements 22,243      
Accumulated Depreciation 3,170      
Seniors Housing Operating | Birmingham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,480      
Initial Cost of Buildings & Improvements 13,014      
Cost Capitalized Subsequent to Acquisition 654      
Carrying Amount of Land 1,530      
Carrying Amount of Buildings and Improvements 13,618      
Accumulated Depreciation 776      
Seniors Housing Operating | Birmingham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,807      
Initial Cost of Buildings & Improvements 11,313      
Cost Capitalized Subsequent to Acquisition 605      
Carrying Amount of Land 2,902      
Carrying Amount of Buildings and Improvements 11,823      
Accumulated Depreciation 645      
Seniors Housing Operating | Blainville, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,077      
Initial Cost of Buildings & Improvements 8,902      
Cost Capitalized Subsequent to Acquisition 429      
Carrying Amount of Land 2,156      
Carrying Amount of Buildings and Improvements 9,252      
Accumulated Depreciation 2,925      
Seniors Housing Operating | Bloomfield Hills, MI        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,000      
Initial Cost of Buildings & Improvements 35,662      
Cost Capitalized Subsequent to Acquisition 1,067      
Carrying Amount of Land 2,133      
Carrying Amount of Buildings and Improvements 36,596      
Accumulated Depreciation 7,455      
Seniors Housing Operating | Boca Raton, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,565      
Initial Cost of Buildings & Improvements 111,247      
Cost Capitalized Subsequent to Acquisition 18,834      
Carrying Amount of Land 6,565      
Carrying Amount of Buildings and Improvements 130,081      
Accumulated Depreciation 7,491      
Seniors Housing Operating | Borehamwood, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,367      
Initial Cost of Buildings & Improvements 41,937      
Cost Capitalized Subsequent to Acquisition 2,246      
Carrying Amount of Land 5,584      
Carrying Amount of Buildings and Improvements 43,966      
Accumulated Depreciation 9,285      
Seniors Housing Operating | Bothell, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 13,439      
Cost Capitalized Subsequent to Acquisition 6,074      
Carrying Amount of Land 1,798      
Carrying Amount of Buildings and Improvements 19,065      
Accumulated Depreciation 2,344      
Seniors Housing Operating | Boulder, CO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,994      
Initial Cost of Buildings & Improvements 27,458      
Cost Capitalized Subsequent to Acquisition 2,271      
Carrying Amount of Land 3,022      
Carrying Amount of Buildings and Improvements 29,701      
Accumulated Depreciation 7,497      
Seniors Housing Operating | Bournemouth, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,527      
Initial Cost of Buildings & Improvements 42,547      
Cost Capitalized Subsequent to Acquisition 2,338      
Carrying Amount of Land 5,725      
Carrying Amount of Buildings and Improvements 44,687      
Accumulated Depreciation 9,186      
Seniors Housing Operating | Braintree, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 41,290      
Cost Capitalized Subsequent to Acquisition 1,079      
Carrying Amount of Land 100      
Carrying Amount of Buildings and Improvements 42,269      
Accumulated Depreciation 8,961      
Seniors Housing Operating | Brampton, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 40,685      
Initial Cost of Land 10,196      
Initial Cost of Buildings & Improvements 59,989      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 10,196      
Carrying Amount of Buildings and Improvements 59,989      
Accumulated Depreciation 10,075      
Seniors Housing Operating | Brick, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,170      
Initial Cost of Buildings & Improvements 17,372      
Cost Capitalized Subsequent to Acquisition 1,530      
Carrying Amount of Land 1,211      
Carrying Amount of Buildings and Improvements 18,861      
Accumulated Depreciation 4,186      
Seniors Housing Operating | Brick, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 690      
Initial Cost of Buildings & Improvements 17,125      
Cost Capitalized Subsequent to Acquisition 5,610      
Carrying Amount of Land 695      
Carrying Amount of Buildings and Improvements 22,730      
Accumulated Depreciation 4,152      
Seniors Housing Operating | Bridgewater, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Buildings & Improvements 48,201      
Cost Capitalized Subsequent to Acquisition 1,562      
Carrying Amount of Land 1,767      
Carrying Amount of Buildings and Improvements 49,726      
Accumulated Depreciation 10,329      
Seniors Housing Operating | Brighton, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,686      
Initial Cost of Land 2,100      
Initial Cost of Buildings & Improvements 14,616      
Cost Capitalized Subsequent to Acquisition 1,712      
Carrying Amount of Land 2,135      
Carrying Amount of Buildings and Improvements 16,293      
Accumulated Depreciation 4,736      
Seniors Housing Operating | Brockport, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 23,496      
Cost Capitalized Subsequent to Acquisition 582      
Carrying Amount of Land 1,705      
Carrying Amount of Buildings and Improvements 23,873      
Accumulated Depreciation 3,890      
Seniors Housing Operating | Brockville, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,288      
Initial Cost of Land 484      
Initial Cost of Buildings & Improvements 7,445      
Cost Capitalized Subsequent to Acquisition 432      
Carrying Amount of Land 498      
Carrying Amount of Buildings and Improvements 7,863      
Accumulated Depreciation 1,170      
Seniors Housing Operating | Brookfield, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 30,180      
Cost Capitalized Subsequent to Acquisition 3,337      
Carrying Amount of Land 2,271      
Carrying Amount of Buildings and Improvements 33,496      
Accumulated Depreciation 9,272      
Seniors Housing Operating | Broomfield, CO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,140      
Initial Cost of Buildings & Improvements 44,547      
Cost Capitalized Subsequent to Acquisition 11,976      
Carrying Amount of Land 10,135      
Carrying Amount of Buildings and Improvements 50,528      
Accumulated Depreciation 16,614      
Seniors Housing Operating | Brossard, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,432      
Initial Cost of Land 5,499      
Initial Cost of Buildings & Improvements 31,854      
Cost Capitalized Subsequent to Acquisition 285      
Carrying Amount of Land 5,427      
Carrying Amount of Buildings and Improvements 32,211      
Accumulated Depreciation 5,560      
Seniors Housing Operating | Buckingham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,979      
Initial Cost of Buildings & Improvements 13,880      
Cost Capitalized Subsequent to Acquisition 744      
Carrying Amount of Land 3,080      
Carrying Amount of Buildings and Improvements 14,523      
Accumulated Depreciation 1,882      
Seniors Housing Operating | Buffalo Grove, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,850      
Initial Cost of Buildings & Improvements 49,129      
Cost Capitalized Subsequent to Acquisition 3,154      
Carrying Amount of Land 2,850      
Carrying Amount of Buildings and Improvements 52,283      
Accumulated Depreciation 10,571      
Seniors Housing Operating | Burbank, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,940      
Initial Cost of Buildings & Improvements 43,466      
Cost Capitalized Subsequent to Acquisition 2,067      
Carrying Amount of Land 4,940      
Carrying Amount of Buildings and Improvements 45,533      
Accumulated Depreciation 10,721      
Seniors Housing Operating | Burbank, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 19,237      
Initial Cost of Land 3,610      
Initial Cost of Buildings & Improvements 50,817      
Cost Capitalized Subsequent to Acquisition 3,983      
Carrying Amount of Land 3,610      
Carrying Amount of Buildings and Improvements 54,800      
Accumulated Depreciation 5,663      
Seniors Housing Operating | Burleson, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,150      
Initial Cost of Buildings & Improvements 10,437      
Cost Capitalized Subsequent to Acquisition 659      
Carrying Amount of Land 3,150      
Carrying Amount of Buildings and Improvements 11,096      
Accumulated Depreciation 1,354      
Seniors Housing Operating | Burlingame, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 62,786      
Cost Capitalized Subsequent to Acquisition 85      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 62,871      
Accumulated Depreciation 4,858      
Seniors Housing Operating | Burlington, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,514      
Initial Cost of Land 1,309      
Initial Cost of Buildings & Improvements 19,311      
Cost Capitalized Subsequent to Acquisition 623      
Carrying Amount of Land 1,338      
Carrying Amount of Buildings and Improvements 19,905      
Accumulated Depreciation 4,321      
Seniors Housing Operating | Burlington, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,443      
Initial Cost of Buildings & Improvements 34,354      
Cost Capitalized Subsequent to Acquisition 1,388      
Carrying Amount of Land 2,522      
Carrying Amount of Buildings and Improvements 35,663      
Accumulated Depreciation 8,007      
Seniors Housing Operating | Burlington, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,750      
Initial Cost of Buildings & Improvements 57,488      
Cost Capitalized Subsequent to Acquisition 3,304      
Carrying Amount of Land 2,750      
Carrying Amount of Buildings and Improvements 60,792      
Accumulated Depreciation 6,120      
Seniors Housing Operating | Bushey, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 12,690      
Initial Cost of Buildings & Improvements 36,482      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 12,690      
Carrying Amount of Buildings and Improvements 36,482      
Accumulated Depreciation 308      
Seniors Housing Operating | Calgary, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,323      
Initial Cost of Land 2,252      
Initial Cost of Buildings & Improvements 37,415      
Cost Capitalized Subsequent to Acquisition 1,286      
Carrying Amount of Land 2,298      
Carrying Amount of Buildings and Improvements 38,655      
Accumulated Depreciation 8,580      
Seniors Housing Operating | Calgary, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,909      
Initial Cost of Land 2,793      
Initial Cost of Buildings & Improvements 41,179      
Cost Capitalized Subsequent to Acquisition 1,065      
Carrying Amount of Land 2,843      
Carrying Amount of Buildings and Improvements 42,194      
Accumulated Depreciation 9,176      
Seniors Housing Operating | Calgary, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,237      
Initial Cost of Land 3,122      
Initial Cost of Buildings & Improvements 38,971      
Cost Capitalized Subsequent to Acquisition 1,241      
Carrying Amount of Land 3,184      
Carrying Amount of Buildings and Improvements 40,150      
Accumulated Depreciation 8,632      
Seniors Housing Operating | Calgary, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 21,247      
Initial Cost of Land 3,431      
Initial Cost of Buildings & Improvements 28,983      
Cost Capitalized Subsequent to Acquisition 1,676      
Carrying Amount of Land 3,498      
Carrying Amount of Buildings and Improvements 30,592      
Accumulated Depreciation 5,754      
Seniors Housing Operating | Calgary, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 24,199      
Initial Cost of Land 2,385      
Initial Cost of Buildings & Improvements 36,776      
Cost Capitalized Subsequent to Acquisition 1,152      
Carrying Amount of Land 2,427      
Carrying Amount of Buildings and Improvements 37,886      
Accumulated Depreciation 5,774      
Seniors Housing Operating | Camberley, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,654      
Initial Cost of Buildings & Improvements 5,736      
Cost Capitalized Subsequent to Acquisition 21,500      
Carrying Amount of Land 8,150      
Carrying Amount of Buildings and Improvements 21,937      
Accumulated Depreciation 1,230      
Seniors Housing Operating | Cardiff, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,191      
Initial Cost of Buildings & Improvements 12,566      
Cost Capitalized Subsequent to Acquisition 884      
Carrying Amount of Land 3,307      
Carrying Amount of Buildings and Improvements 13,334      
Accumulated Depreciation 3,647      
Seniors Housing Operating | Cardiff by the Sea, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 37,025      
Initial Cost of Land 5,880      
Initial Cost of Buildings & Improvements 64,711      
Cost Capitalized Subsequent to Acquisition 4,243      
Carrying Amount of Land 5,880      
Carrying Amount of Buildings and Improvements 68,954      
Accumulated Depreciation 15,985      
Seniors Housing Operating | Carol Stream, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Buildings & Improvements 55,048      
Cost Capitalized Subsequent to Acquisition 2,104      
Carrying Amount of Land 1,730      
Carrying Amount of Buildings and Improvements 57,152      
Accumulated Depreciation 12,748      
Seniors Housing Operating | Carrollton, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,280      
Initial Cost of Buildings & Improvements 31,444      
Cost Capitalized Subsequent to Acquisition 1,041      
Carrying Amount of Land 4,280      
Carrying Amount of Buildings and Improvements 32,485      
Accumulated Depreciation 4,207      
Seniors Housing Operating | Cary, NC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 740      
Initial Cost of Buildings & Improvements 45,240      
Cost Capitalized Subsequent to Acquisition 744      
Carrying Amount of Land 740      
Carrying Amount of Buildings and Improvements 45,984      
Accumulated Depreciation 8,360      
Seniors Housing Operating | Cary, NC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,112      
Initial Cost of Buildings & Improvements 70,008      
Cost Capitalized Subsequent to Acquisition 8,355      
Carrying Amount of Land 6,112      
Carrying Amount of Buildings and Improvements 78,363      
Accumulated Depreciation 3,652      
Seniors Housing Operating | Cedar Park, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 15,664      
Cost Capitalized Subsequent to Acquisition 1,162      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 16,826      
Accumulated Depreciation 1,215      
Seniors Housing Operating | Cerritos, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 27,494      
Cost Capitalized Subsequent to Acquisition 6,570      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 34,064      
Accumulated Depreciation 6,011      
Seniors Housing Operating | Charlottesville, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,651      
Initial Cost of Buildings & Improvements 91,468      
Cost Capitalized Subsequent to Acquisition 11,276      
Carrying Amount of Land 4,651      
Carrying Amount of Buildings and Improvements 102,744      
Accumulated Depreciation 6,952      
Seniors Housing Operating | Chatham, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 895      
Initial Cost of Land 1,098      
Initial Cost of Buildings & Improvements 12,462      
Cost Capitalized Subsequent to Acquisition 1,809      
Carrying Amount of Land 1,193      
Carrying Amount of Buildings and Improvements 14,176      
Accumulated Depreciation 3,167      
Seniors Housing Operating | Chelmsford, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Buildings & Improvements 10,951      
Cost Capitalized Subsequent to Acquisition 1,525      
Carrying Amount of Land 1,040      
Carrying Amount of Buildings and Improvements 12,476      
Accumulated Depreciation 4,625      
Seniors Housing Operating | Chelmsford, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,589      
Initial Cost of Buildings & Improvements 26,432      
Cost Capitalized Subsequent to Acquisition 1,301      
Carrying Amount of Land 1,656      
Carrying Amount of Buildings and Improvements 27,666      
Accumulated Depreciation 3,882      
Seniors Housing Operating | Chertsey, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,566      
Initial Cost of Buildings & Improvements 25,886      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 9,566      
Carrying Amount of Buildings and Improvements 25,886      
Accumulated Depreciation 743      
Seniors Housing Operating | Chesterfield, MO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,857      
Initial Cost of Buildings & Improvements 48,366      
Cost Capitalized Subsequent to Acquisition 1,462      
Carrying Amount of Land 1,917      
Carrying Amount of Buildings and Improvements 49,768      
Accumulated Depreciation 9,624      
Seniors Housing Operating | Chorleywood, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,636      
Initial Cost of Buildings & Improvements 43,191      
Cost Capitalized Subsequent to Acquisition 3,864      
Carrying Amount of Land 5,833      
Carrying Amount of Buildings and Improvements 46,858      
Accumulated Depreciation 10,193      
Seniors Housing Operating | Chula Vista, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,072      
Initial Cost of Buildings & Improvements 22,163      
Cost Capitalized Subsequent to Acquisition 1,201      
Carrying Amount of Land 2,162      
Carrying Amount of Buildings and Improvements 23,274      
Accumulated Depreciation 4,942      
Seniors Housing Operating | Church Crookham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,591      
Initial Cost of Buildings & Improvements 14,215      
Cost Capitalized Subsequent to Acquisition 835      
Carrying Amount of Land 2,691      
Carrying Amount of Buildings and Improvements 14,950      
Accumulated Depreciation 2,596      
Seniors Housing Operating | Cincinnati, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 109,388      
Cost Capitalized Subsequent to Acquisition 13,733      
Carrying Amount of Land 2,080      
Carrying Amount of Buildings and Improvements 123,101      
Accumulated Depreciation 26,921      
Seniors Housing Operating | Citrus Heights, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,300      
Initial Cost of Buildings & Improvements 31,876      
Cost Capitalized Subsequent to Acquisition 726      
Carrying Amount of Land 2,300      
Carrying Amount of Buildings and Improvements 32,602      
Accumulated Depreciation 8,987      
Seniors Housing Operating | Claremont, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,430      
Initial Cost of Buildings & Improvements 9,928      
Cost Capitalized Subsequent to Acquisition 1,479      
Carrying Amount of Land 2,483      
Carrying Amount of Buildings and Improvements 11,354      
Accumulated Depreciation 2,806      
Seniors Housing Operating | Cohasset, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,485      
Initial Cost of Buildings & Improvements 26,147      
Cost Capitalized Subsequent to Acquisition 1,919      
Carrying Amount of Land 2,493      
Carrying Amount of Buildings and Improvements 28,058      
Accumulated Depreciation 6,009      
Seniors Housing Operating | Colleyville, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 17,082      
Cost Capitalized Subsequent to Acquisition 47      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 17,129      
Accumulated Depreciation 921      
Seniors Housing Operating | Colorado Springs, CO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 14,756      
Cost Capitalized Subsequent to Acquisition 1,980      
Carrying Amount of Land 1,026      
Carrying Amount of Buildings and Improvements 16,510      
Accumulated Depreciation 3,610      
Seniors Housing Operating | Colts Neck, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 780      
Initial Cost of Buildings & Improvements 14,733      
Cost Capitalized Subsequent to Acquisition 1,759      
Carrying Amount of Land 1,092      
Carrying Amount of Buildings and Improvements 16,180      
Accumulated Depreciation 3,628      
Seniors Housing Operating | Concord, NH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 21,164      
Cost Capitalized Subsequent to Acquisition 852      
Carrying Amount of Land 789      
Carrying Amount of Buildings and Improvements 21,947      
Accumulated Depreciation 5,450      
Seniors Housing Operating | Coquitlam, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,139      
Initial Cost of Land 3,047      
Initial Cost of Buildings & Improvements 24,567      
Cost Capitalized Subsequent to Acquisition 775      
Carrying Amount of Land 3,098      
Carrying Amount of Buildings and Improvements 25,291      
Accumulated Depreciation 6,583      
Seniors Housing Operating | Costa Mesa, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,050      
Initial Cost of Buildings & Improvements 19,969      
Cost Capitalized Subsequent to Acquisition 1,404      
Carrying Amount of Land 2,050      
Carrying Amount of Buildings and Improvements 21,373      
Accumulated Depreciation 5,647      
Seniors Housing Operating | Crystal Lake, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 875      
Initial Cost of Buildings & Improvements 12,461      
Cost Capitalized Subsequent to Acquisition 1,482      
Carrying Amount of Land 971      
Carrying Amount of Buildings and Improvements 13,847      
Accumulated Depreciation 3,480      
Seniors Housing Operating | Dallas, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,330      
Initial Cost of Buildings & Improvements 114,794      
Cost Capitalized Subsequent to Acquisition 1,613      
Carrying Amount of Land 6,330      
Carrying Amount of Buildings and Improvements 116,407      
Accumulated Depreciation 13,498      
Seniors Housing Operating | Danvers, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,120      
Initial Cost of Buildings & Improvements 14,557      
Cost Capitalized Subsequent to Acquisition 1,505      
Carrying Amount of Land 1,145      
Carrying Amount of Buildings and Improvements 16,037      
Accumulated Depreciation 4,429      
Seniors Housing Operating | Danvers, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,203      
Initial Cost of Buildings & Improvements 28,761      
Cost Capitalized Subsequent to Acquisition 342      
Carrying Amount of Land 2,257      
Carrying Amount of Buildings and Improvements 29,049      
Accumulated Depreciation 4,487      
Seniors Housing Operating | Davenport, IA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,403      
Initial Cost of Buildings & Improvements 35,893      
Cost Capitalized Subsequent to Acquisition 4,269      
Carrying Amount of Land 1,480      
Carrying Amount of Buildings and Improvements 40,085      
Accumulated Depreciation 10,506      
Seniors Housing Operating | Decatur, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,946      
Initial Cost of Buildings & Improvements 26,575      
Cost Capitalized Subsequent to Acquisition 2,504      
Carrying Amount of Land 1,946      
Carrying Amount of Buildings and Improvements 29,079      
Accumulated Depreciation 6,609      
Seniors Housing Operating | Denver, CO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,910      
Initial Cost of Buildings & Improvements 35,838      
Cost Capitalized Subsequent to Acquisition 1,827      
Carrying Amount of Land 2,971      
Carrying Amount of Buildings and Improvements 37,604      
Accumulated Depreciation 9,558      
Seniors Housing Operating | Dix Hills, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,808      
Initial Cost of Buildings & Improvements 39,014      
Cost Capitalized Subsequent to Acquisition 1,861      
Carrying Amount of Land 3,947      
Carrying Amount of Buildings and Improvements 40,736      
Accumulated Depreciation 8,624      
Seniors Housing Operating | Dollard-Des-Ormeaux, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,957      
Initial Cost of Buildings & Improvements 14,431      
Cost Capitalized Subsequent to Acquisition 538      
Carrying Amount of Land 2,039      
Carrying Amount of Buildings and Improvements 14,887      
Accumulated Depreciation 4,786      
Seniors Housing Operating | Dresher, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,900      
Initial Cost of Buildings & Improvements 10,664      
Cost Capitalized Subsequent to Acquisition 1,151      
Carrying Amount of Land 1,914      
Carrying Amount of Buildings and Improvements 11,801      
Accumulated Depreciation 3,660      
Seniors Housing Operating | Dublin, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,680      
Initial Cost of Buildings & Improvements 43,423      
Cost Capitalized Subsequent to Acquisition 6,837      
Carrying Amount of Land 1,850      
Carrying Amount of Buildings and Improvements 50,090      
Accumulated Depreciation 14,301      
Seniors Housing Operating | Dublin, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,169      
Initial Cost of Buildings & Improvements 25,345      
Cost Capitalized Subsequent to Acquisition 47      
Carrying Amount of Land 1,169      
Carrying Amount of Buildings and Improvements 25,392      
Accumulated Depreciation 2,232      
Seniors Housing Operating | East Haven, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,660      
Initial Cost of Buildings & Improvements 35,533      
Cost Capitalized Subsequent to Acquisition 3,458      
Carrying Amount of Land 2,685      
Carrying Amount of Buildings and Improvements 38,966      
Accumulated Depreciation 12,649      
Seniors Housing Operating | East Meadow, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 69      
Initial Cost of Buildings & Improvements 45,991      
Cost Capitalized Subsequent to Acquisition 1,471      
Carrying Amount of Land 124      
Carrying Amount of Buildings and Improvements 47,407      
Accumulated Depreciation 9,848      
Seniors Housing Operating | East Setauket, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,920      
Initial Cost of Buildings & Improvements 37,354      
Cost Capitalized Subsequent to Acquisition 1,647      
Carrying Amount of Land 4,975      
Carrying Amount of Buildings and Improvements 38,946      
Accumulated Depreciation 8,143      
Seniors Housing Operating | Eastbourne, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,145      
Initial Cost of Buildings & Improvements 33,744      
Cost Capitalized Subsequent to Acquisition 1,554      
Carrying Amount of Land 4,298      
Carrying Amount of Buildings and Improvements 35,145      
Accumulated Depreciation 7,685      
Seniors Housing Operating | Edgbaston, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Buildings & Improvements 13,969      
Cost Capitalized Subsequent to Acquisition 722      
Carrying Amount of Land 2,812      
Carrying Amount of Buildings and Improvements 14,599      
Accumulated Depreciation 1,490      
Seniors Housing Operating | Edgewater, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,561      
Initial Cost of Buildings & Improvements 25,047      
Cost Capitalized Subsequent to Acquisition 1,518      
Carrying Amount of Land 4,564      
Carrying Amount of Buildings and Improvements 26,562      
Accumulated Depreciation 5,889      
Seniors Housing Operating | Edison, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,892      
Initial Cost of Buildings & Improvements 32,314      
Cost Capitalized Subsequent to Acquisition 2,249      
Carrying Amount of Land 1,905      
Carrying Amount of Buildings and Improvements 34,550      
Accumulated Depreciation 9,486      
Seniors Housing Operating | Edmonds, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,650      
Initial Cost of Buildings & Improvements 24,449      
Cost Capitalized Subsequent to Acquisition 4,823      
Carrying Amount of Land 1,672      
Carrying Amount of Buildings and Improvements 29,250      
Accumulated Depreciation 3,548      
Seniors Housing Operating | Edmonton, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,239      
Initial Cost of Land 1,589      
Initial Cost of Buildings & Improvements 29,819      
Cost Capitalized Subsequent to Acquisition 1,093      
Carrying Amount of Land 1,632      
Carrying Amount of Buildings and Improvements 30,869      
Accumulated Depreciation 6,909      
Seniors Housing Operating | Edmonton, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,728      
Initial Cost of Land 2,063      
Initial Cost of Buildings & Improvements 37,293      
Cost Capitalized Subsequent to Acquisition 1,514      
Carrying Amount of Land 2,094      
Carrying Amount of Buildings and Improvements 38,776      
Accumulated Depreciation 10,602      
Seniors Housing Operating | Encinitas, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,460      
Initial Cost of Buildings & Improvements 7,721      
Cost Capitalized Subsequent to Acquisition 2,662      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 10,383      
Accumulated Depreciation 4,496      
Seniors Housing Operating | Encino, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,040      
Initial Cost of Buildings & Improvements 46,255      
Cost Capitalized Subsequent to Acquisition 2,211      
Carrying Amount of Land 5,040      
Carrying Amount of Buildings and Improvements 48,466      
Accumulated Depreciation 11,067      
Seniors Housing Operating | Englishtown, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 690      
Initial Cost of Buildings & Improvements 12,520      
Cost Capitalized Subsequent to Acquisition 1,873      
Carrying Amount of Land 834      
Carrying Amount of Buildings and Improvements 14,249      
Accumulated Depreciation 3,230      
Seniors Housing Operating | Escondido, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,520      
Initial Cost of Buildings & Improvements 24,024      
Cost Capitalized Subsequent to Acquisition 1,323      
Carrying Amount of Land 1,520      
Carrying Amount of Buildings and Improvements 25,347      
Accumulated Depreciation 6,708      
Seniors Housing Operating | Esher, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,783      
Initial Cost of Buildings & Improvements 48,361      
Cost Capitalized Subsequent to Acquisition 2,365      
Carrying Amount of Land 5,999      
Carrying Amount of Buildings and Improvements 50,510      
Accumulated Depreciation 9,941      
Seniors Housing Operating | Fairfax, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 19      
Initial Cost of Buildings & Improvements 2,678      
Cost Capitalized Subsequent to Acquisition 312      
Carrying Amount of Land 53      
Carrying Amount of Buildings and Improvements 2,956      
Accumulated Depreciation 941      
Seniors Housing Operating | Fairfield, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,120      
Initial Cost of Buildings & Improvements 43,868      
Cost Capitalized Subsequent to Acquisition 1,373      
Carrying Amount of Land 3,175      
Carrying Amount of Buildings and Improvements 45,186      
Accumulated Depreciation 9,629      
Seniors Housing Operating | Fairfield, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,460      
Initial Cost of Buildings & Improvements 14,040      
Cost Capitalized Subsequent to Acquisition 1,565      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 15,605      
Accumulated Depreciation 6,635      
Seniors Housing Operating | Fareham, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,408      
Initial Cost of Buildings & Improvements 17,970      
Cost Capitalized Subsequent to Acquisition 1,077      
Carrying Amount of Land 3,536      
Carrying Amount of Buildings and Improvements 18,919      
Accumulated Depreciation 2,887      
Seniors Housing Operating | Flossmoor, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,292      
Initial Cost of Buildings & Improvements 9,496      
Cost Capitalized Subsequent to Acquisition 1,835      
Carrying Amount of Land 1,339      
Carrying Amount of Buildings and Improvements 11,284      
Accumulated Depreciation 3,068      
Seniors Housing Operating | Folsom, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,490      
Initial Cost of Buildings & Improvements 32,754      
Cost Capitalized Subsequent to Acquisition 84      
Carrying Amount of Land 1,490      
Carrying Amount of Buildings and Improvements 32,838      
Accumulated Depreciation 4,420      
Seniors Housing Operating | Fort Worth, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,740      
Initial Cost of Buildings & Improvements 19,799      
Cost Capitalized Subsequent to Acquisition 1,089      
Carrying Amount of Land 1,740      
Carrying Amount of Buildings and Improvements 20,888      
Accumulated Depreciation 2,265      
Seniors Housing Operating | Franklin, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,430      
Initial Cost of Buildings & Improvements 30,597      
Cost Capitalized Subsequent to Acquisition 2,564      
Carrying Amount of Land 2,467      
Carrying Amount of Buildings and Improvements 33,124      
Accumulated Depreciation 6,623      
Seniors Housing Operating | Fremont, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 25,300      
Cost Capitalized Subsequent to Acquisition 3,331      
Carrying Amount of Land 3,456      
Carrying Amount of Buildings and Improvements 28,575      
Accumulated Depreciation 10,193      
Seniors Housing Operating | Frome, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Buildings & Improvements 14,813      
Cost Capitalized Subsequent to Acquisition 832      
Carrying Amount of Land 2,812      
Carrying Amount of Buildings and Improvements 15,553      
Accumulated Depreciation 2,122      
Seniors Housing Operating | Fullerton, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,964      
Initial Cost of Buildings & Improvements 19,989      
Cost Capitalized Subsequent to Acquisition 883      
Carrying Amount of Land 1,998      
Carrying Amount of Buildings and Improvements 20,838      
Accumulated Depreciation 4,718      
Seniors Housing Operating | Gahanna, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 772      
Initial Cost of Buildings & Improvements 11,214      
Cost Capitalized Subsequent to Acquisition 1,609      
Carrying Amount of Land 787      
Carrying Amount of Buildings and Improvements 12,808      
Accumulated Depreciation 2,765      
Seniors Housing Operating | Gilbert, AZ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,436      
Initial Cost of Land 2,160      
Initial Cost of Buildings & Improvements 28,246      
Cost Capitalized Subsequent to Acquisition 1,429      
Carrying Amount of Land 2,176      
Carrying Amount of Buildings and Improvements 29,659      
Accumulated Depreciation 8,274      
Seniors Housing Operating | Gilroy, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 760      
Initial Cost of Buildings & Improvements 13,880      
Cost Capitalized Subsequent to Acquisition 24,966      
Carrying Amount of Land 1,588      
Carrying Amount of Buildings and Improvements 38,018      
Accumulated Depreciation 11,161      
Seniors Housing Operating | Glen Cove, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,594      
Initial Cost of Buildings & Improvements 35,236      
Cost Capitalized Subsequent to Acquisition 1,877      
Carrying Amount of Land 4,643      
Carrying Amount of Buildings and Improvements 37,064      
Accumulated Depreciation 9,193      
Seniors Housing Operating | Glenview, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,090      
Initial Cost of Buildings & Improvements 69,288      
Cost Capitalized Subsequent to Acquisition 3,353      
Carrying Amount of Land 2,090      
Carrying Amount of Buildings and Improvements 72,641      
Accumulated Depreciation 15,745      
Seniors Housing Operating | Golden Valley, MN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,520      
Initial Cost of Buildings & Improvements 33,513      
Cost Capitalized Subsequent to Acquisition 1,383      
Carrying Amount of Land 1,602      
Carrying Amount of Buildings and Improvements 34,814      
Accumulated Depreciation 7,025      
Seniors Housing Operating | Granbury, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,040      
Initial Cost of Buildings & Improvements 30,670      
Cost Capitalized Subsequent to Acquisition 651      
Carrying Amount of Land 2,040      
Carrying Amount of Buildings and Improvements 31,321      
Accumulated Depreciation 6,325      
Seniors Housing Operating | Greenville, SC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 4,750      
Cost Capitalized Subsequent to Acquisition 36      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 4,786      
Accumulated Depreciation 1,927      
Seniors Housing Operating | Grimsby, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 636      
Initial Cost of Buildings & Improvements 5,617      
Cost Capitalized Subsequent to Acquisition 271      
Carrying Amount of Land 649      
Carrying Amount of Buildings and Improvements 5,875      
Accumulated Depreciation 990      
Seniors Housing Operating | Grosse Pointe Woods, MI        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 13,662      
Cost Capitalized Subsequent to Acquisition 611      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 14,273      
Accumulated Depreciation 2,835      
Seniors Housing Operating | Grosse Pointe Woods, MI        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,430      
Initial Cost of Buildings & Improvements 31,777      
Cost Capitalized Subsequent to Acquisition 1,118      
Carrying Amount of Land 1,435      
Carrying Amount of Buildings and Improvements 32,890      
Accumulated Depreciation 6,544      
Seniors Housing Operating | Grove City, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 36,420      
Initial Cost of Land 3,575      
Initial Cost of Buildings & Improvements 85,764      
Cost Capitalized Subsequent to Acquisition 1,420      
Carrying Amount of Land 3,575      
Carrying Amount of Buildings and Improvements 87,184      
Accumulated Depreciation 15      
Seniors Housing Operating | Guelph, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,985      
Initial Cost of Land 1,190      
Initial Cost of Buildings & Improvements 7,597      
Cost Capitalized Subsequent to Acquisition 407      
Carrying Amount of Land 1,224      
Carrying Amount of Buildings and Improvements 7,970      
Accumulated Depreciation 1,551      
Seniors Housing Operating | Guildford, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,361      
Initial Cost of Buildings & Improvements 56,494      
Cost Capitalized Subsequent to Acquisition 2,457      
Carrying Amount of Land 5,542      
Carrying Amount of Buildings and Improvements 58,770      
Accumulated Depreciation 11,811      
Seniors Housing Operating | Gurnee, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 890      
Initial Cost of Buildings & Improvements 27,931      
Cost Capitalized Subsequent to Acquisition 2,110      
Carrying Amount of Land 935      
Carrying Amount of Buildings and Improvements 29,996      
Accumulated Depreciation 5,768      
Seniors Housing Operating | Haddonfield, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 520      
Initial Cost of Buildings & Improvements 16,363      
Cost Capitalized Subsequent to Acquisition 22      
Carrying Amount of Land 527      
Carrying Amount of Buildings and Improvements 16,378      
Accumulated Depreciation 1,796      
Seniors Housing Operating | Hamden, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,460      
Initial Cost of Buildings & Improvements 24,093      
Cost Capitalized Subsequent to Acquisition 1,912      
Carrying Amount of Land 1,493      
Carrying Amount of Buildings and Improvements 25,972      
Accumulated Depreciation 7,593      
Seniors Housing Operating | Hampshire, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,172      
Initial Cost of Buildings & Improvements 26,035      
Cost Capitalized Subsequent to Acquisition 1,185      
Carrying Amount of Land 4,322      
Carrying Amount of Buildings and Improvements 27,070      
Accumulated Depreciation 5,857      
Seniors Housing Operating | Haverford, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,880      
Initial Cost of Buildings & Improvements 33,993      
Cost Capitalized Subsequent to Acquisition 1,305      
Carrying Amount of Land 1,885      
Carrying Amount of Buildings and Improvements 35,293      
Accumulated Depreciation 7,263      
Seniors Housing Operating | Haverhill, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,720      
Initial Cost of Buildings & Improvements 50,046      
Cost Capitalized Subsequent to Acquisition 1,165      
Carrying Amount of Land 1,729      
Carrying Amount of Buildings and Improvements 51,202      
Accumulated Depreciation 7,876      
Seniors Housing Operating | Henderson, NV        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 29,809      
Cost Capitalized Subsequent to Acquisition 994      
Carrying Amount of Land 897      
Carrying Amount of Buildings and Improvements 30,786      
Accumulated Depreciation 6,451      
Seniors Housing Operating | Henderson, NV        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,190      
Initial Cost of Buildings & Improvements 11,600      
Cost Capitalized Subsequent to Acquisition 968      
Carrying Amount of Land 1,253      
Carrying Amount of Buildings and Improvements 12,505      
Accumulated Depreciation 3,765      
Seniors Housing Operating | High Wycombe, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,567      
Initial Cost of Buildings & Improvements 13,422      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,567      
Carrying Amount of Buildings and Improvements 13,422      
Accumulated Depreciation 622      
Seniors Housing Operating | Highland Park, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 25,313      
Cost Capitalized Subsequent to Acquisition 1,378      
Carrying Amount of Land 2,265      
Carrying Amount of Buildings and Improvements 26,676      
Accumulated Depreciation 6,466      
Seniors Housing Operating | Hingham, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 32,292      
Cost Capitalized Subsequent to Acquisition 269      
Carrying Amount of Land 1,444      
Carrying Amount of Buildings and Improvements 32,557      
Accumulated Depreciation 4,511      
Seniors Housing Operating | Holbrook, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,957      
Initial Cost of Buildings & Improvements 35,337      
Cost Capitalized Subsequent to Acquisition 1,819      
Carrying Amount of Land 4,021      
Carrying Amount of Buildings and Improvements 37,092      
Accumulated Depreciation 7,637      
Seniors Housing Operating | Horley, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,332      
Initial Cost of Buildings & Improvements 12,144      
Cost Capitalized Subsequent to Acquisition 776      
Carrying Amount of Land 2,418      
Carrying Amount of Buildings and Improvements 12,834      
Accumulated Depreciation 2,253      
Seniors Housing Operating | Houston, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,830      
Initial Cost of Buildings & Improvements 55,674      
Cost Capitalized Subsequent to Acquisition 6,995      
Carrying Amount of Land 3,830      
Carrying Amount of Buildings and Improvements 62,669      
Accumulated Depreciation 15,150      
Seniors Housing Operating | Houston, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 15,603      
Cost Capitalized Subsequent to Acquisition 1,531      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 17,134      
Accumulated Depreciation 1,328      
Seniors Housing Operating | Houston, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 16,151      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 16,151      
Accumulated Depreciation 7,703      
Seniors Housing Operating | Howell, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,493      
Initial Cost of Land 1,066      
Initial Cost of Buildings & Improvements 21,577      
Cost Capitalized Subsequent to Acquisition 936      
Carrying Amount of Land 1,077      
Carrying Amount of Buildings and Improvements 22,502      
Accumulated Depreciation 4,782      
Seniors Housing Operating | Huntington Beach, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,808      
Initial Cost of Buildings & Improvements 31,172      
Cost Capitalized Subsequent to Acquisition 2,573      
Carrying Amount of Land 3,886      
Carrying Amount of Buildings and Improvements 33,667      
Accumulated Depreciation 8,390      
Seniors Housing Operating | Hutchinson, KS        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 10,590      
Cost Capitalized Subsequent to Acquisition 324      
Carrying Amount of Land 604      
Carrying Amount of Buildings and Improvements 10,910      
Accumulated Depreciation 3,986      
Seniors Housing Operating | Irving, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,030      
Initial Cost of Buildings & Improvements 6,823      
Cost Capitalized Subsequent to Acquisition 1,332      
Carrying Amount of Land 1,030      
Carrying Amount of Buildings and Improvements 8,155      
Accumulated Depreciation 2,320      
Seniors Housing Operating | Johns Creek, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Buildings & Improvements 23,285      
Cost Capitalized Subsequent to Acquisition 827      
Carrying Amount of Land 1,588      
Carrying Amount of Buildings and Improvements 24,104      
Accumulated Depreciation 5,111      
Seniors Housing Operating | Kanata, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,689      
Initial Cost of Buildings & Improvements 28,670      
Cost Capitalized Subsequent to Acquisition 87      
Carrying Amount of Land 1,663      
Carrying Amount of Buildings and Improvements 28,783      
Accumulated Depreciation 6,073      
Seniors Housing Operating | Kansas City, MO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 34,898      
Cost Capitalized Subsequent to Acquisition 5,057      
Carrying Amount of Land 1,856      
Carrying Amount of Buildings and Improvements 39,919      
Accumulated Depreciation 11,822      
Seniors Housing Operating | Kansas City, MO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,265      
Initial Cost of Land 1,930      
Initial Cost of Buildings & Improvements 39,997      
Cost Capitalized Subsequent to Acquisition 4,923      
Carrying Amount of Land 1,963      
Carrying Amount of Buildings and Improvements 44,887      
Accumulated Depreciation 13,359      
Seniors Housing Operating | Kansas City, MO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 541      
Initial Cost of Buildings & Improvements 23,962      
Cost Capitalized Subsequent to Acquisition 274      
Carrying Amount of Land 548      
Carrying Amount of Buildings and Improvements 24,229      
Accumulated Depreciation 3,142      
Seniors Housing Operating | Kelowna, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,190      
Initial Cost of Land 2,688      
Initial Cost of Buildings & Improvements 13,647      
Cost Capitalized Subsequent to Acquisition 1,125      
Carrying Amount of Land 2,739      
Carrying Amount of Buildings and Improvements 14,721      
Accumulated Depreciation 3,777      
Seniors Housing Operating | Kennebunk, ME        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,700      
Initial Cost of Buildings & Improvements 30,204      
Cost Capitalized Subsequent to Acquisition 5,353      
Carrying Amount of Land 3,200      
Carrying Amount of Buildings and Improvements 35,057      
Accumulated Depreciation 12,239      
Seniors Housing Operating | Kennett Square, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 22,946      
Cost Capitalized Subsequent to Acquisition 356      
Carrying Amount of Land 1,092      
Carrying Amount of Buildings and Improvements 23,260      
Accumulated Depreciation 4,837      
Seniors Housing Operating | Kingston, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,202      
Initial Cost of Land 1,030      
Initial Cost of Buildings & Improvements 11,416      
Cost Capitalized Subsequent to Acquisition 844      
Carrying Amount of Land 1,060      
Carrying Amount of Buildings and Improvements 12,230      
Accumulated Depreciation 1,768      
Seniors Housing Operating | Kingwood, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 9,777      
Cost Capitalized Subsequent to Acquisition 1,096      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 10,873      
Accumulated Depreciation 2,698      
Seniors Housing Operating | Kingwood, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,683      
Initial Cost of Buildings & Improvements 24,207      
Cost Capitalized Subsequent to Acquisition 2,465      
Carrying Amount of Land 1,683      
Carrying Amount of Buildings and Improvements 26,672      
Accumulated Depreciation 2,493      
Seniors Housing Operating | Kirkland, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 24,600      
Initial Cost of Land 3,450      
Initial Cost of Buildings & Improvements 38,709      
Cost Capitalized Subsequent to Acquisition 1,204      
Carrying Amount of Land 3,523      
Carrying Amount of Buildings and Improvements 39,840      
Accumulated Depreciation 8,936      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,327      
Initial Cost of Land 708      
Initial Cost of Buildings & Improvements 2,744      
Cost Capitalized Subsequent to Acquisition 111      
Carrying Amount of Land 650      
Carrying Amount of Buildings and Improvements 2,913      
Accumulated Depreciation 764      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,293      
Initial Cost of Land 1,130      
Initial Cost of Buildings & Improvements 9,939      
Cost Capitalized Subsequent to Acquisition 417      
Carrying Amount of Land 1,163      
Carrying Amount of Buildings and Improvements 10,323      
Accumulated Depreciation 2,398      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,271      
Initial Cost of Land 1,093      
Initial Cost of Buildings & Improvements 7,327      
Cost Capitalized Subsequent to Acquisition 346      
Carrying Amount of Land 1,112      
Carrying Amount of Buildings and Improvements 7,654      
Accumulated Depreciation 2,201      
Seniors Housing Operating | Kitchener, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,164      
Initial Cost of Land 1,341      
Initial Cost of Buildings & Improvements 13,939      
Cost Capitalized Subsequent to Acquisition 2,763      
Carrying Amount of Land 1,324      
Carrying Amount of Buildings and Improvements 16,719      
Accumulated Depreciation 3,178      
Seniors Housing Operating | La Palma, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,950      
Initial Cost of Buildings & Improvements 16,591      
Cost Capitalized Subsequent to Acquisition 1,313      
Carrying Amount of Land 2,973      
Carrying Amount of Buildings and Improvements 17,881      
Accumulated Depreciation 3,857      
Seniors Housing Operating | Lafayette Hill, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 11,848      
Cost Capitalized Subsequent to Acquisition 2,311      
Carrying Amount of Land 1,867      
Carrying Amount of Buildings and Improvements 14,042      
Accumulated Depreciation 3,981      
Seniors Housing Operating | Laguna Hills, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 12,820      
Initial Cost of Buildings & Improvements 75,926      
Cost Capitalized Subsequent to Acquisition 17,135      
Carrying Amount of Land 12,820      
Carrying Amount of Buildings and Improvements 93,061      
Accumulated Depreciation 12,877      
Seniors Housing Operating | Laguna Woods, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,280      
Initial Cost of Buildings & Improvements 76,485      
Cost Capitalized Subsequent to Acquisition 12,253      
Carrying Amount of Land 11,280      
Carrying Amount of Buildings and Improvements 88,738      
Accumulated Depreciation 12,298      
Seniors Housing Operating | Laguna Woods, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9,150      
Initial Cost of Buildings & Improvements 57,842      
Cost Capitalized Subsequent to Acquisition 8,919      
Carrying Amount of Land 9,150      
Carrying Amount of Buildings and Improvements 66,761      
Accumulated Depreciation 9,651      
Seniors Housing Operating | Lake Zurich, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,470      
Initial Cost of Buildings & Improvements 9,830      
Cost Capitalized Subsequent to Acquisition 3,002      
Carrying Amount of Land 1,470      
Carrying Amount of Buildings and Improvements 12,832      
Accumulated Depreciation 4,506      
Seniors Housing Operating | Lancaster, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 15,295      
Cost Capitalized Subsequent to Acquisition 781      
Carrying Amount of Land 712      
Carrying Amount of Buildings and Improvements 16,064      
Accumulated Depreciation 4,731      
Seniors Housing Operating | Laval, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 21,982      
Initial Cost of Land 2,105      
Initial Cost of Buildings & Improvements 32,161      
Cost Capitalized Subsequent to Acquisition 3,051      
Carrying Amount of Land 2,105      
Carrying Amount of Buildings and Improvements 35,212      
Accumulated Depreciation 721      
Seniors Housing Operating | Laval, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,283      
Initial Cost of Land 2,383      
Initial Cost of Buildings & Improvements 5,968      
Cost Capitalized Subsequent to Acquisition 550      
Carrying Amount of Land 2,383      
Carrying Amount of Buildings and Improvements 6,518      
Accumulated Depreciation 136      
Seniors Housing Operating | Lawrenceville, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 29,003      
Cost Capitalized Subsequent to Acquisition 741      
Carrying Amount of Land 1,529      
Carrying Amount of Buildings and Improvements 29,715      
Accumulated Depreciation 6,432      
Seniors Housing Operating | Leatherhead, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,682      
Initial Cost of Buildings & Improvements 17,835      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,682      
Carrying Amount of Buildings and Improvements 17,835      
Accumulated Depreciation 718      
Seniors Housing Operating | Lecanto, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 6,900      
Cost Capitalized Subsequent to Acquisition 371      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 7,271      
Accumulated Depreciation 2,705      
Seniors Housing Operating | Lenexa, KS        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 826      
Initial Cost of Buildings & Improvements 26,251      
Cost Capitalized Subsequent to Acquisition 1,285      
Carrying Amount of Land 922      
Carrying Amount of Buildings and Improvements 27,440      
Accumulated Depreciation 6,432      
Seniors Housing Operating | Leominster, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 944      
Initial Cost of Buildings & Improvements 23,164      
Cost Capitalized Subsequent to Acquisition 688      
Carrying Amount of Land 995      
Carrying Amount of Buildings and Improvements 23,801      
Accumulated Depreciation 3,687      
Seniors Housing Operating | Lincroft, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 9      
Initial Cost of Buildings & Improvements 19,958      
Cost Capitalized Subsequent to Acquisition 1,706      
Carrying Amount of Land 79      
Carrying Amount of Buildings and Improvements 21,594      
Accumulated Depreciation 4,667      
Seniors Housing Operating | Linwood, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 21,984      
Cost Capitalized Subsequent to Acquisition 1,168      
Carrying Amount of Land 861      
Carrying Amount of Buildings and Improvements 23,091      
Accumulated Depreciation 5,012      
Seniors Housing Operating | Litchfield, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,240      
Initial Cost of Buildings & Improvements 17,908      
Cost Capitalized Subsequent to Acquisition 11,060      
Carrying Amount of Land 1,258      
Carrying Amount of Buildings and Improvements 28,950      
Accumulated Depreciation 4,862      
Seniors Housing Operating | Little Neck, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,350      
Initial Cost of Buildings & Improvements 38,461      
Cost Capitalized Subsequent to Acquisition 1,421      
Carrying Amount of Land 3,358      
Carrying Amount of Buildings and Improvements 39,874      
Accumulated Depreciation 8,411      
Seniors Housing Operating | Livingston, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,000      
Initial Cost of Buildings & Improvements 44,424      
Cost Capitalized Subsequent to Acquisition 160      
Carrying Amount of Land 8,000      
Carrying Amount of Buildings and Improvements 44,584      
Accumulated Depreciation 2,119      
Seniors Housing Operating | Lombard, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,975      
Initial Cost of Land 2,130      
Initial Cost of Buildings & Improvements 59,943      
Cost Capitalized Subsequent to Acquisition 1,474      
Carrying Amount of Land 2,147      
Carrying Amount of Buildings and Improvements 61,400      
Accumulated Depreciation 12,455      
Seniors Housing Operating | London, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,121      
Initial Cost of Buildings & Improvements 10,027      
Cost Capitalized Subsequent to Acquisition 934      
Carrying Amount of Land 3,231      
Carrying Amount of Buildings and Improvements 10,851      
Accumulated Depreciation 1,465      
Seniors Housing Operating | London, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,691      
Initial Cost of Buildings & Improvements 16,797      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 7,691      
Carrying Amount of Buildings and Improvements 16,797      
Accumulated Depreciation 1,007      
Seniors Housing Operating | London, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 34      
Initial Cost of Land 987      
Initial Cost of Buildings & Improvements 8,228      
Cost Capitalized Subsequent to Acquisition 628      
Carrying Amount of Land 1,030      
Carrying Amount of Buildings and Improvements 8,813      
Accumulated Depreciation 1,477      
Seniors Housing Operating | London, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,009      
Initial Cost of Land 1,969      
Initial Cost of Buildings & Improvements 16,985      
Cost Capitalized Subsequent to Acquisition 1,214      
Carrying Amount of Land 1,998      
Carrying Amount of Buildings and Improvements 18,170      
Accumulated Depreciation 3,022      
Seniors Housing Operating | London, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,445      
Initial Cost of Buildings & Improvements 13,631      
Cost Capitalized Subsequent to Acquisition 953      
Carrying Amount of Land 1,579      
Carrying Amount of Buildings and Improvements 14,450      
Accumulated Depreciation 2,131      
Seniors Housing Operating | Longueuil, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,064      
Initial Cost of Land 3,992      
Initial Cost of Buildings & Improvements 23,711      
Cost Capitalized Subsequent to Acquisition 1,778      
Carrying Amount of Land 4,102      
Carrying Amount of Buildings and Improvements 25,379      
Accumulated Depreciation 4,144      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 11,430      
Cost Capitalized Subsequent to Acquisition 1,951      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 13,381      
Accumulated Depreciation 3,690      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 60,018      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 114,438      
Cost Capitalized Subsequent to Acquisition 2,355      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 116,793      
Accumulated Depreciation 28,628      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,540      
Initial Cost of Buildings & Improvements 19,007      
Cost Capitalized Subsequent to Acquisition 2,583      
Carrying Amount of Land 3,540      
Carrying Amount of Buildings and Improvements 21,590      
Accumulated Depreciation 4,919      
Seniors Housing Operating | Los Angeles, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 28,050      
Cost Capitalized Subsequent to Acquisition 3,370      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 31,420      
Accumulated Depreciation 3,286      
Seniors Housing Operating | Louisville, KY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,420      
Initial Cost of Buildings & Improvements 20,816      
Cost Capitalized Subsequent to Acquisition 1,863      
Carrying Amount of Land 2,420      
Carrying Amount of Buildings and Improvements 22,679      
Accumulated Depreciation 5,317      
Seniors Housing Operating | Louisville, KY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,562      
Initial Cost of Land 1,600      
Initial Cost of Buildings & Improvements 20,326      
Cost Capitalized Subsequent to Acquisition 774      
Carrying Amount of Land 1,600      
Carrying Amount of Buildings and Improvements 21,100      
Accumulated Depreciation 4,926      
Seniors Housing Operating | Lynnfield, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,165      
Initial Cost of Buildings & Improvements 45,200      
Cost Capitalized Subsequent to Acquisition 2,580      
Carrying Amount of Land 3,507      
Carrying Amount of Buildings and Improvements 47,438      
Accumulated Depreciation 10,225      
Seniors Housing Operating | Mahwah, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,605      
Initial Cost of Buildings & Improvements 27,249      
Cost Capitalized Subsequent to Acquisition 17      
Carrying Amount of Land 1,605      
Carrying Amount of Buildings and Improvements 27,266      
Accumulated Depreciation 2,539      
Seniors Housing Operating | Malvern, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,651      
Initial Cost of Buildings & Improvements 17,194      
Cost Capitalized Subsequent to Acquisition 2,128      
Carrying Amount of Land 1,739      
Carrying Amount of Buildings and Improvements 19,234      
Accumulated Depreciation 5,499      
Seniors Housing Operating | Mansfield, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,320      
Initial Cost of Buildings & Improvements 57,011      
Cost Capitalized Subsequent to Acquisition 8,714      
Carrying Amount of Land 3,486      
Carrying Amount of Buildings and Improvements 65,559      
Accumulated Depreciation 17,826      
Seniors Housing Operating | Manteca, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 12,125      
Cost Capitalized Subsequent to Acquisition 1,648      
Carrying Amount of Land 1,312      
Carrying Amount of Buildings and Improvements 13,761      
Accumulated Depreciation 5,447      
Seniors Housing Operating | Maple Ridge, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,159      
Initial Cost of Land 2,875      
Initial Cost of Buildings & Improvements 11,922      
Cost Capitalized Subsequent to Acquisition 321      
Carrying Amount of Land 2,943      
Carrying Amount of Buildings and Improvements 12,175      
Accumulated Depreciation 1,489      
Seniors Housing Operating | Marieville, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,198      
Initial Cost of Land 1,278      
Initial Cost of Buildings & Improvements 12,113      
Cost Capitalized Subsequent to Acquisition 117      
Carrying Amount of Land 1,302      
Carrying Amount of Buildings and Improvements 12,206      
Accumulated Depreciation 1,691      
Seniors Housing Operating | Markham, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 36,530      
Initial Cost of Land 3,727      
Initial Cost of Buildings & Improvements 48,939      
Cost Capitalized Subsequent to Acquisition 1,429      
Carrying Amount of Land 3,825      
Carrying Amount of Buildings and Improvements 50,270      
Accumulated Depreciation 13,999      
Seniors Housing Operating | Marlboro, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,222      
Initial Cost of Buildings & Improvements 14,888      
Cost Capitalized Subsequent to Acquisition 1,395      
Carrying Amount of Land 2,250      
Carrying Amount of Buildings and Improvements 16,255      
Accumulated Depreciation 3,791      
Seniors Housing Operating | Medicine Hat, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,262      
Initial Cost of Land 1,432      
Initial Cost of Buildings & Improvements 14,141      
Cost Capitalized Subsequent to Acquisition 48      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 14,161      
Accumulated Depreciation 2,923      
Seniors Housing Operating | Melbourne, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,070      
Initial Cost of Buildings & Improvements 48,257      
Cost Capitalized Subsequent to Acquisition 31,652      
Carrying Amount of Land 7,070      
Carrying Amount of Buildings and Improvements 79,909      
Accumulated Depreciation 19,642      
Seniors Housing Operating | Melville, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,280      
Initial Cost of Buildings & Improvements 73,283      
Cost Capitalized Subsequent to Acquisition 4,916      
Carrying Amount of Land 4,313      
Carrying Amount of Buildings and Improvements 78,166      
Accumulated Depreciation 15,980      
Seniors Housing Operating | Memphis, TN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 17,744      
Cost Capitalized Subsequent to Acquisition 1,919      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 19,663      
Accumulated Depreciation 5,597      
Seniors Housing Operating | Meriden, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 14,874      
Cost Capitalized Subsequent to Acquisition 1,429      
Carrying Amount of Land 1,542      
Carrying Amount of Buildings and Improvements 16,261      
Accumulated Depreciation 5,727      
Seniors Housing Operating | Metairie, LA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,521      
Initial Cost of Land 725      
Initial Cost of Buildings & Improvements 27,708      
Cost Capitalized Subsequent to Acquisition 778      
Carrying Amount of Land 725      
Carrying Amount of Buildings and Improvements 28,486      
Accumulated Depreciation 5,596      
Seniors Housing Operating | Middletown, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,430      
Initial Cost of Buildings & Improvements 24,242      
Cost Capitalized Subsequent to Acquisition 1,986      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 26,198      
Accumulated Depreciation 7,799      
Seniors Housing Operating | Milford, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,210      
Initial Cost of Buildings & Improvements 17,364      
Cost Capitalized Subsequent to Acquisition 2,328      
Carrying Amount of Land 3,233      
Carrying Amount of Buildings and Improvements 19,669      
Accumulated Depreciation 6,536      
Seniors Housing Operating | Mill Creek, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 10,150      
Initial Cost of Buildings & Improvements 60,274      
Cost Capitalized Subsequent to Acquisition 1,320      
Carrying Amount of Land 10,179      
Carrying Amount of Buildings and Improvements 61,565      
Accumulated Depreciation 18,700      
Seniors Housing Operating | Milton, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,723      
Initial Cost of Land 4,542      
Initial Cost of Buildings & Improvements 25,321      
Cost Capitalized Subsequent to Acquisition 1,962      
Carrying Amount of Land 4,627      
Carrying Amount of Buildings and Improvements 27,198      
Accumulated Depreciation 3,433      
Seniors Housing Operating | Minnetonka, MN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,080      
Initial Cost of Buildings & Improvements 24,360      
Cost Capitalized Subsequent to Acquisition 2,571      
Carrying Amount of Land 2,450      
Carrying Amount of Buildings and Improvements 26,561      
Accumulated Depreciation 6,303      
Seniors Housing Operating | Minnetonka, MN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 29,344      
Cost Capitalized Subsequent to Acquisition 1,161      
Carrying Amount of Land 964      
Carrying Amount of Buildings and Improvements 30,461      
Accumulated Depreciation 5,900      
Seniors Housing Operating | Mission Viejo, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,850      
Initial Cost of Land 6,600      
Initial Cost of Buildings & Improvements 52,118      
Cost Capitalized Subsequent to Acquisition 7,758      
Carrying Amount of Land 6,600      
Carrying Amount of Buildings and Improvements 59,876      
Accumulated Depreciation 7,475      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,358      
Initial Cost of Land 1,602      
Initial Cost of Buildings & Improvements 17,996      
Cost Capitalized Subsequent to Acquisition 621      
Carrying Amount of Land 1,626      
Carrying Amount of Buildings and Improvements 18,593      
Accumulated Depreciation 4,140      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,816      
Initial Cost of Land 873      
Initial Cost of Buildings & Improvements 4,655      
Cost Capitalized Subsequent to Acquisition 232      
Carrying Amount of Land 887      
Carrying Amount of Buildings and Improvements 4,873      
Accumulated Depreciation 1,147      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 26,718      
Initial Cost of Land 3,649      
Initial Cost of Buildings & Improvements 35,137      
Cost Capitalized Subsequent to Acquisition 1,441      
Carrying Amount of Land 3,723      
Carrying Amount of Buildings and Improvements 36,504      
Accumulated Depreciation 8,161      
Seniors Housing Operating | Mississauga, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,916      
Initial Cost of Land 2,548      
Initial Cost of Buildings & Improvements 15,158      
Cost Capitalized Subsequent to Acquisition 1,751      
Carrying Amount of Land 2,589      
Carrying Amount of Buildings and Improvements 16,868      
Accumulated Depreciation 3,177      
Seniors Housing Operating | Missoula, MT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 550      
Initial Cost of Buildings & Improvements 7,490      
Cost Capitalized Subsequent to Acquisition 437      
Carrying Amount of Land 550      
Carrying Amount of Buildings and Improvements 7,927      
Accumulated Depreciation 2,767      
Seniors Housing Operating | Mobberley, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,146      
Initial Cost of Buildings & Improvements 26,665      
Cost Capitalized Subsequent to Acquisition 1,834      
Carrying Amount of Land 5,340      
Carrying Amount of Buildings and Improvements 28,305      
Accumulated Depreciation 7,514      
Seniors Housing Operating | Monterey, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,440      
Initial Cost of Buildings & Improvements 29,101      
Cost Capitalized Subsequent to Acquisition 1,549      
Carrying Amount of Land 6,440      
Carrying Amount of Buildings and Improvements 30,650      
Accumulated Depreciation 6,486      
Seniors Housing Operating | Montgomery, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,482      
Initial Cost of Buildings & Improvements 83,642      
Cost Capitalized Subsequent to Acquisition 10,924      
Carrying Amount of Land 6,482      
Carrying Amount of Buildings and Improvements 94,566      
Accumulated Depreciation 3,480      
Seniors Housing Operating | Montgomery Village, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,530      
Initial Cost of Buildings & Improvements 18,246      
Cost Capitalized Subsequent to Acquisition 6,745      
Carrying Amount of Land 4,279      
Carrying Amount of Buildings and Improvements 24,242      
Accumulated Depreciation 9,021      
Seniors Housing Operating | Montreal-Nord, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,740      
Initial Cost of Land 4,407      
Initial Cost of Buildings & Improvements 23,719      
Cost Capitalized Subsequent to Acquisition 2,992      
Carrying Amount of Land 4,407      
Carrying Amount of Buildings and Improvements 26,711      
Accumulated Depreciation 511      
Seniors Housing Operating | Moorestown, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 51,628      
Cost Capitalized Subsequent to Acquisition 1,982      
Carrying Amount of Land 2,083      
Carrying Amount of Buildings and Improvements 53,587      
Accumulated Depreciation 11,069      
Seniors Housing Operating | Moose Jaw, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,076      
Initial Cost of Land 582      
Initial Cost of Buildings & Improvements 12,973      
Cost Capitalized Subsequent to Acquisition 906      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 13,871      
Accumulated Depreciation 3,039      
Seniors Housing Operating | Murphy, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,950      
Initial Cost of Buildings & Improvements 19,182      
Cost Capitalized Subsequent to Acquisition 805      
Carrying Amount of Land 1,950      
Carrying Amount of Buildings and Improvements 19,987      
Accumulated Depreciation 1,781      
Seniors Housing Operating | Naperville, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,550      
Initial Cost of Buildings & Improvements 12,237      
Cost Capitalized Subsequent to Acquisition 2,433      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 14,670      
Accumulated Depreciation 3,760      
Seniors Housing Operating | Naperville, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Buildings & Improvements 28,204      
Cost Capitalized Subsequent to Acquisition 1,392      
Carrying Amount of Land 1,573      
Carrying Amount of Buildings and Improvements 29,563      
Accumulated Depreciation 6,517      
Seniors Housing Operating | Naples, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 56,105      
Initial Cost of Land 8,989      
Initial Cost of Buildings & Improvements 119,398      
Cost Capitalized Subsequent to Acquisition 5,055      
Carrying Amount of Land 9,088      
Carrying Amount of Buildings and Improvements 124,354      
Accumulated Depreciation 22,444      
Seniors Housing Operating | Nashua, NH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,264      
Initial Cost of Buildings & Improvements 43,026      
Cost Capitalized Subsequent to Acquisition 1,373      
Carrying Amount of Land 1,264      
Carrying Amount of Buildings and Improvements 44,399      
Accumulated Depreciation 5,491      
Seniors Housing Operating | Nashville, TN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,900      
Initial Cost of Buildings & Improvements 35,788      
Cost Capitalized Subsequent to Acquisition 2,848      
Carrying Amount of Land 3,900      
Carrying Amount of Buildings and Improvements 38,636      
Accumulated Depreciation 10,313      
Seniors Housing Operating | Needham, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,240      
Initial Cost of Buildings & Improvements 32,992      
Cost Capitalized Subsequent to Acquisition 1,322      
Carrying Amount of Land 1,240      
Carrying Amount of Buildings and Improvements 34,314      
Accumulated Depreciation 2,853      
Seniors Housing Operating | Nepean, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,387      
Initial Cost of Land 1,575      
Initial Cost of Buildings & Improvements 5,770      
Cost Capitalized Subsequent to Acquisition 528      
Carrying Amount of Land 1,613      
Carrying Amount of Buildings and Improvements 6,260      
Accumulated Depreciation 1,447      
Seniors Housing Operating | New Braunfels, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 19,800      
Cost Capitalized Subsequent to Acquisition 10,352      
Carrying Amount of Land 2,729      
Carrying Amount of Buildings and Improvements 28,623      
Accumulated Depreciation 4,906      
Seniors Housing Operating | Newark, DE        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 21,220      
Cost Capitalized Subsequent to Acquisition 1,569      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 22,789      
Accumulated Depreciation 8,065      
Seniors Housing Operating | Newbury, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,850      
Initial Cost of Buildings & Improvements 12,796      
Cost Capitalized Subsequent to Acquisition 672      
Carrying Amount of Land 2,946      
Carrying Amount of Buildings and Improvements 13,372      
Accumulated Depreciation 810      
Seniors Housing Operating | Newburyport, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 29,187      
Cost Capitalized Subsequent to Acquisition 1,194      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 30,381      
Accumulated Depreciation 2,656      
Seniors Housing Operating | Newmarket, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,071      
Initial Cost of Buildings & Improvements 11,902      
Cost Capitalized Subsequent to Acquisition 1,190      
Carrying Amount of Land 4,228      
Carrying Amount of Buildings and Improvements 12,935      
Accumulated Depreciation 2,005      
Seniors Housing Operating | Newton, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 43,614      
Cost Capitalized Subsequent to Acquisition 1,253      
Carrying Amount of Land 2,263      
Carrying Amount of Buildings and Improvements 44,854      
Accumulated Depreciation 11,966      
Seniors Housing Operating | Newton, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,881      
Initial Cost of Land 2,500      
Initial Cost of Buildings & Improvements 30,681      
Cost Capitalized Subsequent to Acquisition 3,183      
Carrying Amount of Land 2,574      
Carrying Amount of Buildings and Improvements 33,790      
Accumulated Depreciation 9,409      
Seniors Housing Operating | Newton, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,360      
Initial Cost of Buildings & Improvements 25,099      
Cost Capitalized Subsequent to Acquisition 1,820      
Carrying Amount of Land 3,385      
Carrying Amount of Buildings and Improvements 26,894      
Accumulated Depreciation 8,053      
Seniors Housing Operating | Newtown Square, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,930      
Initial Cost of Buildings & Improvements 14,420      
Cost Capitalized Subsequent to Acquisition 1,161      
Carrying Amount of Land 1,946      
Carrying Amount of Buildings and Improvements 15,565      
Accumulated Depreciation 4,577      
Seniors Housing Operating | Niagara Falls, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,335      
Initial Cost of Land 1,225      
Initial Cost of Buildings & Improvements 7,963      
Cost Capitalized Subsequent to Acquisition 466      
Carrying Amount of Land 1,242      
Carrying Amount of Buildings and Improvements 8,412      
Accumulated Depreciation 1,457      
Seniors Housing Operating | North Andover, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,960      
Initial Cost of Buildings & Improvements 34,976      
Cost Capitalized Subsequent to Acquisition 2,116      
Carrying Amount of Land 2,111      
Carrying Amount of Buildings and Improvements 36,941      
Accumulated Depreciation 10,087      
Seniors Housing Operating | North Chelmsford, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 18,478      
Cost Capitalized Subsequent to Acquisition 999      
Carrying Amount of Land 951      
Carrying Amount of Buildings and Improvements 19,406      
Accumulated Depreciation 5,126      
Seniors Housing Operating | North Dartmouth, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,700      
Initial Cost of Buildings & Improvements 35,337      
Cost Capitalized Subsequent to Acquisition 1,723      
Carrying Amount of Land 1,700      
Carrying Amount of Buildings and Improvements 37,060      
Accumulated Depreciation 3,374      
Seniors Housing Operating | North Tustin, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,880      
Initial Cost of Buildings & Improvements 18,059      
Cost Capitalized Subsequent to Acquisition 891      
Carrying Amount of Land 2,975      
Carrying Amount of Buildings and Improvements 18,855      
Accumulated Depreciation 3,564      
Seniors Housing Operating | Oak Park, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,250      
Initial Cost of Buildings & Improvements 40,383      
Cost Capitalized Subsequent to Acquisition 1,749      
Carrying Amount of Land 1,250      
Carrying Amount of Buildings and Improvements 42,132      
Accumulated Depreciation 9,526      
Seniors Housing Operating | Oakland, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,877      
Initial Cost of Buildings & Improvements 47,508      
Cost Capitalized Subsequent to Acquisition 3,252      
Carrying Amount of Land 4,036      
Carrying Amount of Buildings and Improvements 50,601      
Accumulated Depreciation 10,954      
Seniors Housing Operating | Oakton, VA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 37,576      
Cost Capitalized Subsequent to Acquisition 2,218      
Carrying Amount of Land 2,378      
Carrying Amount of Buildings and Improvements 39,666      
Accumulated Depreciation 8,352      
Seniors Housing Operating | Oakville, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,499      
Initial Cost of Land 1,252      
Initial Cost of Buildings & Improvements 7,382      
Cost Capitalized Subsequent to Acquisition 373      
Carrying Amount of Land 1,278      
Carrying Amount of Buildings and Improvements 7,729      
Accumulated Depreciation 1,795      
Seniors Housing Operating | Oakville, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,164      
Initial Cost of Land 2,134      
Initial Cost of Buildings & Improvements 29,963      
Cost Capitalized Subsequent to Acquisition 1,107      
Carrying Amount of Land 2,165      
Carrying Amount of Buildings and Improvements 31,039      
Accumulated Depreciation 7,349      
Seniors Housing Operating | Oakville, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,797      
Initial Cost of Land 1,271      
Initial Cost of Buildings & Improvements 13,754      
Cost Capitalized Subsequent to Acquisition 606      
Carrying Amount of Land 1,289      
Carrying Amount of Buildings and Improvements 14,342      
Accumulated Depreciation 2,929      
Seniors Housing Operating | Oceanside, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,160      
Initial Cost of Buildings & Improvements 18,352      
Cost Capitalized Subsequent to Acquisition 4,094      
Carrying Amount of Land 2,243      
Carrying Amount of Buildings and Improvements 22,363      
Accumulated Depreciation 6,097      
Seniors Housing Operating | Ogden, UT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 360      
Initial Cost of Buildings & Improvements 6,700      
Cost Capitalized Subsequent to Acquisition 731      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 7,431      
Accumulated Depreciation 2,689      
Seniors Housing Operating | Okotoks, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,892      
Initial Cost of Land 714      
Initial Cost of Buildings & Improvements 20,943      
Cost Capitalized Subsequent to Acquisition 557      
Carrying Amount of Land 728      
Carrying Amount of Buildings and Improvements 21,486      
Accumulated Depreciation 3,640      
Seniors Housing Operating | Oshawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,547      
Initial Cost of Land 841      
Initial Cost of Buildings & Improvements 7,570      
Cost Capitalized Subsequent to Acquisition 458      
Carrying Amount of Land 884      
Carrying Amount of Buildings and Improvements 7,985      
Accumulated Depreciation 1,834      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,469      
Initial Cost of Land 1,341      
Initial Cost of Buildings & Improvements 15,425      
Cost Capitalized Subsequent to Acquisition 1,439      
Carrying Amount of Land 1,396      
Carrying Amount of Buildings and Improvements 16,809      
Accumulated Depreciation 2,176      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,808      
Initial Cost of Land 3,454      
Initial Cost of Buildings & Improvements 23,309      
Cost Capitalized Subsequent to Acquisition 1,351      
Carrying Amount of Land 3,559      
Carrying Amount of Buildings and Improvements 24,555      
Accumulated Depreciation 6,617      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 20,414      
Initial Cost of Land 4,256      
Initial Cost of Buildings & Improvements 39,141      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,256      
Carrying Amount of Buildings and Improvements 39,141      
Accumulated Depreciation 5,917      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,070      
Initial Cost of Land 2,103      
Initial Cost of Buildings & Improvements 18,421      
Cost Capitalized Subsequent to Acquisition 3,150      
Carrying Amount of Land 2,180      
Carrying Amount of Buildings and Improvements 21,494      
Accumulated Depreciation 3,096      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,444      
Initial Cost of Land 2,963      
Initial Cost of Buildings & Improvements 26,424      
Cost Capitalized Subsequent to Acquisition 1,880      
Carrying Amount of Land 3,041      
Carrying Amount of Buildings and Improvements 28,226      
Accumulated Depreciation 3,647      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 10,161      
Initial Cost of Land 1,561      
Initial Cost of Buildings & Improvements 18,170      
Cost Capitalized Subsequent to Acquisition 1,336      
Carrying Amount of Land 1,647      
Carrying Amount of Buildings and Improvements 19,420      
Accumulated Depreciation 2,412      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,568      
Initial Cost of Land 3,403      
Initial Cost of Buildings & Improvements 31,090      
Cost Capitalized Subsequent to Acquisition 1,941      
Carrying Amount of Land 3,467      
Carrying Amount of Buildings and Improvements 32,967      
Accumulated Depreciation 4,134      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,204      
Initial Cost of Land 3,411      
Initial Cost of Buildings & Improvements 28,335      
Cost Capitalized Subsequent to Acquisition 4,152      
Carrying Amount of Land 3,502      
Carrying Amount of Buildings and Improvements 32,396      
Accumulated Depreciation 5,257      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,765      
Initial Cost of Land 724      
Initial Cost of Buildings & Improvements 4,710      
Cost Capitalized Subsequent to Acquisition 231      
Carrying Amount of Land 735      
Carrying Amount of Buildings and Improvements 4,930      
Accumulated Depreciation 1,171      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,012      
Initial Cost of Land 818      
Initial Cost of Buildings & Improvements 2,165      
Cost Capitalized Subsequent to Acquisition 1,192      
Carrying Amount of Land 691      
Carrying Amount of Buildings and Improvements 3,484      
Accumulated Depreciation 888      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 9,559      
Initial Cost of Land 2,809      
Initial Cost of Buildings & Improvements 27,299      
Cost Capitalized Subsequent to Acquisition 1,253      
Carrying Amount of Land 2,880      
Carrying Amount of Buildings and Improvements 28,481      
Accumulated Depreciation 7,177      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,441      
Initial Cost of Land 1,156      
Initial Cost of Buildings & Improvements 9,758      
Cost Capitalized Subsequent to Acquisition 481      
Carrying Amount of Land 1,227      
Carrying Amount of Buildings and Improvements 10,168      
Accumulated Depreciation 2,151      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,778      
Initial Cost of Land 746      
Initial Cost of Buildings & Improvements 7,800      
Cost Capitalized Subsequent to Acquisition 541      
Carrying Amount of Land 763      
Carrying Amount of Buildings and Improvements 8,324      
Accumulated Depreciation 1,805      
Seniors Housing Operating | Ottawa, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,729      
Initial Cost of Land 1,176      
Initial Cost of Buildings & Improvements 12,764      
Cost Capitalized Subsequent to Acquisition 778      
Carrying Amount of Land 1,231      
Carrying Amount of Buildings and Improvements 13,487      
Accumulated Depreciation 1,876      
Seniors Housing Operating | Outremont, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,544      
Initial Cost of Land 6,746      
Initial Cost of Buildings & Improvements 45,981      
Cost Capitalized Subsequent to Acquisition 5,133      
Carrying Amount of Land 6,746      
Carrying Amount of Buildings and Improvements 51,114      
Accumulated Depreciation 1,007      
Seniors Housing Operating | Palo Alto, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 39,639      
Cost Capitalized Subsequent to Acquisition 3,055      
Carrying Amount of Land 24      
Carrying Amount of Buildings and Improvements 42,670      
Accumulated Depreciation 8,872      
Seniors Housing Operating | Paramus, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,840      
Initial Cost of Buildings & Improvements 35,728      
Cost Capitalized Subsequent to Acquisition 1,729      
Carrying Amount of Land 2,947      
Carrying Amount of Buildings and Improvements 37,350      
Accumulated Depreciation 7,659      
Seniors Housing Operating | Parkland, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 55,694      
Initial Cost of Land 4,880      
Initial Cost of Buildings & Improvements 111,481      
Cost Capitalized Subsequent to Acquisition 4,087      
Carrying Amount of Land 4,904      
Carrying Amount of Buildings and Improvements 115,544      
Accumulated Depreciation 20,538      
Seniors Housing Operating | Paso Robles, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,770      
Initial Cost of Buildings & Improvements 8,630      
Cost Capitalized Subsequent to Acquisition 707      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 9,337      
Accumulated Depreciation 4,032      
Seniors Housing Operating | Peabody, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,012      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 16,071      
Cost Capitalized Subsequent to Acquisition 1,099      
Carrying Amount of Land 2,324      
Carrying Amount of Buildings and Improvements 17,096      
Accumulated Depreciation 2,858      
Seniors Housing Operating | Pembroke, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,931      
Initial Cost of Buildings & Improvements 9,427      
Cost Capitalized Subsequent to Acquisition 433      
Carrying Amount of Land 1,901      
Carrying Amount of Buildings and Improvements 9,890      
Accumulated Depreciation 2,011      
Seniors Housing Operating | Pennington, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,380      
Initial Cost of Buildings & Improvements 27,620      
Cost Capitalized Subsequent to Acquisition 1,115      
Carrying Amount of Land 1,491      
Carrying Amount of Buildings and Improvements 28,624      
Accumulated Depreciation 5,562      
Seniors Housing Operating | Peoria, AZ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 766      
Initial Cost of Buildings & Improvements 21,796      
Cost Capitalized Subsequent to Acquisition 1,635      
Carrying Amount of Land 766      
Carrying Amount of Buildings and Improvements 23,431      
Accumulated Depreciation 1,482      
Seniors Housing Operating | Pittsburgh, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Buildings & Improvements 18,017      
Cost Capitalized Subsequent to Acquisition 925      
Carrying Amount of Land 1,587      
Carrying Amount of Buildings and Improvements 18,935      
Accumulated Depreciation 4,437      
Seniors Housing Operating | Placentia, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,480      
Initial Cost of Buildings & Improvements 17,076      
Cost Capitalized Subsequent to Acquisition 5,087      
Carrying Amount of Land 8,480      
Carrying Amount of Buildings and Improvements 22,163      
Accumulated Depreciation 3,576      
Seniors Housing Operating | Plainview, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,066      
Initial Cost of Buildings & Improvements 19,901      
Cost Capitalized Subsequent to Acquisition 1,018      
Carrying Amount of Land 3,182      
Carrying Amount of Buildings and Improvements 20,803      
Accumulated Depreciation 4,124      
Seniors Housing Operating | Plano, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,120      
Initial Cost of Buildings & Improvements 59,950      
Cost Capitalized Subsequent to Acquisition 3,124      
Carrying Amount of Land 3,173      
Carrying Amount of Buildings and Improvements 63,021      
Accumulated Depreciation 16,579      
Seniors Housing Operating | Plano, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 15,390      
Cost Capitalized Subsequent to Acquisition 1,954      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 17,344      
Accumulated Depreciation 1,626      
Seniors Housing Operating | Playa Vista, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,580      
Initial Cost of Buildings & Improvements 40,531      
Cost Capitalized Subsequent to Acquisition 1,636      
Carrying Amount of Land 1,605      
Carrying Amount of Buildings and Improvements 42,142      
Accumulated Depreciation 8,978      
Seniors Housing Operating | Plymouth, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,444      
Initial Cost of Buildings & Improvements 34,951      
Cost Capitalized Subsequent to Acquisition 1,122      
Carrying Amount of Land 1,453      
Carrying Amount of Buildings and Improvements 36,064      
Accumulated Depreciation 5,093      
Seniors Housing Operating | Plymouth, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,169      
Initial Cost of Land 2,550      
Initial Cost of Buildings & Improvements 35,055      
Cost Capitalized Subsequent to Acquisition 2,256      
Carrying Amount of Land 2,550      
Carrying Amount of Buildings and Improvements 37,311      
Accumulated Depreciation 3,895      
Seniors Housing Operating | Port Perry, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,989      
Initial Cost of Land 3,685      
Initial Cost of Buildings & Improvements 26,788      
Cost Capitalized Subsequent to Acquisition 2,365      
Carrying Amount of Land 3,747      
Carrying Amount of Buildings and Improvements 29,091      
Accumulated Depreciation 3,509      
Seniors Housing Operating | Port St. Lucie, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,700      
Initial Cost of Buildings & Improvements 47,230      
Cost Capitalized Subsequent to Acquisition 20,478      
Carrying Amount of Land 8,700      
Carrying Amount of Buildings and Improvements 67,708      
Accumulated Depreciation 15,304      
Seniors Housing Operating | Princeton, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,730      
Initial Cost of Buildings & Improvements 30,888      
Cost Capitalized Subsequent to Acquisition 1,839      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 32,647      
Accumulated Depreciation 6,494      
Seniors Housing Operating | Purley, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,365      
Initial Cost of Buildings & Improvements 35,161      
Cost Capitalized Subsequent to Acquisition 2,104      
Carrying Amount of Land 7,625      
Carrying Amount of Buildings and Improvements 37,005      
Accumulated Depreciation 8,905      
Seniors Housing Operating | Quebec City, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,495      
Initial Cost of Land 2,420      
Initial Cost of Buildings & Improvements 21,977      
Cost Capitalized Subsequent to Acquisition 1,767      
Carrying Amount of Land 2,420      
Carrying Amount of Buildings and Improvements 23,744      
Accumulated Depreciation 466      
Seniors Housing Operating | Quebec City, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,067      
Initial Cost of Land 3,300      
Initial Cost of Buildings & Improvements 28,325      
Cost Capitalized Subsequent to Acquisition 2,207      
Carrying Amount of Land 3,300      
Carrying Amount of Buildings and Improvements 30,532      
Accumulated Depreciation 605      
Seniors Housing Operating | Queensbury, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,260      
Initial Cost of Buildings & Improvements 21,744      
Cost Capitalized Subsequent to Acquisition 1,014      
Carrying Amount of Land 1,264      
Carrying Amount of Buildings and Improvements 22,754      
Accumulated Depreciation 3,140      
Seniors Housing Operating | Quincy, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 12,584      
Cost Capitalized Subsequent to Acquisition 981      
Carrying Amount of Land 1,428      
Carrying Amount of Buildings and Improvements 13,487      
Accumulated Depreciation 4,083      
Seniors Housing Operating | Rancho Cucamonga, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,480      
Initial Cost of Buildings & Improvements 10,055      
Cost Capitalized Subsequent to Acquisition 1,848      
Carrying Amount of Land 2,073      
Carrying Amount of Buildings and Improvements 11,310      
Accumulated Depreciation 2,978      
Seniors Housing Operating | Rancho Palos Verdes, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,450      
Initial Cost of Buildings & Improvements 60,034      
Cost Capitalized Subsequent to Acquisition 2,453      
Carrying Amount of Land 5,450      
Carrying Amount of Buildings and Improvements 62,487      
Accumulated Depreciation 14,179      
Seniors Housing Operating | Randolph, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Buildings & Improvements 46,934      
Cost Capitalized Subsequent to Acquisition 1,379      
Carrying Amount of Land 1,619      
Carrying Amount of Buildings and Improvements 48,234      
Accumulated Depreciation 9,841      
Seniors Housing Operating | Red Deer, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,026      
Initial Cost of Land 1,247      
Initial Cost of Buildings & Improvements 19,283      
Cost Capitalized Subsequent to Acquisition 592      
Carrying Amount of Land 1,273      
Carrying Amount of Buildings and Improvements 19,849      
Accumulated Depreciation 3,093      
Seniors Housing Operating | Red Deer, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,153      
Initial Cost of Land 1,199      
Initial Cost of Buildings & Improvements 22,339      
Cost Capitalized Subsequent to Acquisition 632      
Carrying Amount of Land 1,219      
Carrying Amount of Buildings and Improvements 22,951      
Accumulated Depreciation 3,655      
Seniors Housing Operating | Redondo Beach, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 9,557      
Cost Capitalized Subsequent to Acquisition 913      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,470      
Accumulated Depreciation 6,436      
Seniors Housing Operating | Regina, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,224      
Initial Cost of Land 1,485      
Initial Cost of Buildings & Improvements 21,148      
Cost Capitalized Subsequent to Acquisition 638      
Carrying Amount of Land 1,525      
Carrying Amount of Buildings and Improvements 21,746      
Accumulated Depreciation 5,280      
Seniors Housing Operating | Regina, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,158      
Initial Cost of Land 1,244      
Initial Cost of Buildings & Improvements 21,036      
Cost Capitalized Subsequent to Acquisition 716      
Carrying Amount of Land 1,267      
Carrying Amount of Buildings and Improvements 21,729      
Accumulated Depreciation 4,579      
Seniors Housing Operating | Regina, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,076      
Initial Cost of Land 1,539      
Initial Cost of Buildings & Improvements 24,053      
Cost Capitalized Subsequent to Acquisition 2,617      
Carrying Amount of Land 1,579      
Carrying Amount of Buildings and Improvements 26,630      
Accumulated Depreciation 3,750      
Seniors Housing Operating | Rehoboth Beach, DE        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 24,248      
Cost Capitalized Subsequent to Acquisition 8,847      
Carrying Amount of Land 993      
Carrying Amount of Buildings and Improvements 33,062      
Accumulated Depreciation 6,077      
Seniors Housing Operating | Renton, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 20,790      
Initial Cost of Land 3,080      
Initial Cost of Buildings & Improvements 51,824      
Cost Capitalized Subsequent to Acquisition 1,999      
Carrying Amount of Land 3,124      
Carrying Amount of Buildings and Improvements 53,779      
Accumulated Depreciation 11,898      
Seniors Housing Operating | Ridgefield, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,100      
Initial Cost of Buildings & Improvements 80,614      
Cost Capitalized Subsequent to Acquisition 5,250      
Carrying Amount of Land 3,152      
Carrying Amount of Buildings and Improvements 85,812      
Accumulated Depreciation 13,614      
Seniors Housing Operating | Riviere-du-Loup, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 2,892      
Initial Cost of Land 592      
Initial Cost of Buildings & Improvements 7,601      
Cost Capitalized Subsequent to Acquisition 761      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 8,364      
Accumulated Depreciation 1,150      
Seniors Housing Operating | Riviere-du-Loup, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,905      
Initial Cost of Land 1,454      
Initial Cost of Buildings & Improvements 16,848      
Cost Capitalized Subsequent to Acquisition 3,500      
Carrying Amount of Land 1,563      
Carrying Amount of Buildings and Improvements 20,239      
Accumulated Depreciation 3,453      
Seniors Housing Operating | Rocky Hill, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,090      
Initial Cost of Buildings & Improvements 6,710      
Cost Capitalized Subsequent to Acquisition 1,534      
Carrying Amount of Land 1,090      
Carrying Amount of Buildings and Improvements 8,244      
Accumulated Depreciation 3,089      
Seniors Housing Operating | Rocky Hill, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 810      
Initial Cost of Buildings & Improvements 16,351      
Cost Capitalized Subsequent to Acquisition 833      
Carrying Amount of Land 926      
Carrying Amount of Buildings and Improvements 17,068      
Accumulated Depreciation 4,679      
Seniors Housing Operating | Rohnert Park, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,500      
Initial Cost of Buildings & Improvements 18,700      
Cost Capitalized Subsequent to Acquisition 2,205      
Carrying Amount of Land 6,556      
Carrying Amount of Buildings and Improvements 20,849      
Accumulated Depreciation 7,644      
Seniors Housing Operating | Romeoville, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 854      
Initial Cost of Buildings & Improvements 12,646      
Cost Capitalized Subsequent to Acquisition 61,135      
Carrying Amount of Land 6,197      
Carrying Amount of Buildings and Improvements 68,438      
Accumulated Depreciation 16,480      
Seniors Housing Operating | Roseville, MN        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,540      
Initial Cost of Buildings & Improvements 35,877      
Cost Capitalized Subsequent to Acquisition 1,053      
Carrying Amount of Land 1,607      
Carrying Amount of Buildings and Improvements 36,863      
Accumulated Depreciation 7,263      
Seniors Housing Operating | Roseville, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,300      
Initial Cost of Buildings & Improvements 41,652      
Cost Capitalized Subsequent to Acquisition 6,273      
Carrying Amount of Land 3,300      
Carrying Amount of Buildings and Improvements 47,925      
Accumulated Depreciation 6,003      
Seniors Housing Operating | Sacramento, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 14,781      
Cost Capitalized Subsequent to Acquisition 314      
Carrying Amount of Land 952      
Carrying Amount of Buildings and Improvements 15,083      
Accumulated Depreciation 4,097      
Seniors Housing Operating | Sacramento, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 23,394      
Cost Capitalized Subsequent to Acquisition 1,402      
Carrying Amount of Land 1,369      
Carrying Amount of Buildings and Improvements 24,727      
Accumulated Depreciation 5,105      
Seniors Housing Operating | Saint-Lambert, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 33,431      
Initial Cost of Land 10,259      
Initial Cost of Buildings & Improvements 61,903      
Cost Capitalized Subsequent to Acquisition 366      
Carrying Amount of Land 10,499      
Carrying Amount of Buildings and Improvements 62,029      
Accumulated Depreciation 12,901      
Seniors Housing Operating | Salem, NH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 980      
Initial Cost of Buildings & Improvements 32,721      
Cost Capitalized Subsequent to Acquisition 4,326      
Carrying Amount of Land 1,054      
Carrying Amount of Buildings and Improvements 36,973      
Accumulated Depreciation 8,805      
Seniors Housing Operating | Salinas, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,110      
Initial Cost of Buildings & Improvements 41,424      
Cost Capitalized Subsequent to Acquisition 7,694      
Carrying Amount of Land 5,110      
Carrying Amount of Buildings and Improvements 49,118      
Accumulated Depreciation 7,379      
Seniors Housing Operating | Salisbury, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,720      
Initial Cost of Buildings & Improvements 15,269      
Cost Capitalized Subsequent to Acquisition 719      
Carrying Amount of Land 2,812      
Carrying Amount of Buildings and Improvements 15,896      
Accumulated Depreciation 2,011      
Seniors Housing Operating | Salt Lake City, UT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,360      
Initial Cost of Buildings & Improvements 19,691      
Cost Capitalized Subsequent to Acquisition 1,601      
Carrying Amount of Land 1,360      
Carrying Amount of Buildings and Improvements 21,292      
Accumulated Depreciation 6,988      
Seniors Housing Operating | San Angelo, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 260      
Initial Cost of Buildings & Improvements 8,800      
Cost Capitalized Subsequent to Acquisition 459      
Carrying Amount of Land 266      
Carrying Amount of Buildings and Improvements 9,253      
Accumulated Depreciation 3,349      
Seniors Housing Operating | San Antonio, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,120      
Initial Cost of Buildings & Improvements 28,169      
Cost Capitalized Subsequent to Acquisition 2,590      
Carrying Amount of Land 6,120      
Carrying Amount of Buildings and Improvements 30,759      
Accumulated Depreciation 6,071      
Seniors Housing Operating | San Antonio, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,045      
Initial Cost of Buildings & Improvements 58,048      
Cost Capitalized Subsequent to Acquisition 3,228      
Carrying Amount of Land 5,045      
Carrying Amount of Buildings and Improvements 61,276      
Accumulated Depreciation 3,306      
Seniors Housing Operating | San Diego, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,200      
Initial Cost of Buildings & Improvements 30,707      
Cost Capitalized Subsequent to Acquisition 731      
Carrying Amount of Land 4,243      
Carrying Amount of Buildings and Improvements 31,395      
Accumulated Depreciation 5,825      
Seniors Housing Operating | San Diego, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,810      
Initial Cost of Buildings & Improvements 63,078      
Cost Capitalized Subsequent to Acquisition 2,808      
Carrying Amount of Land 5,810      
Carrying Amount of Buildings and Improvements 65,886      
Accumulated Depreciation 17,092      
Seniors Housing Operating | San Diego, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,000      
Initial Cost of Buildings & Improvements 27,164      
Cost Capitalized Subsequent to Acquisition 881      
Carrying Amount of Land 3,016      
Carrying Amount of Buildings and Improvements 28,029      
Accumulated Depreciation 5,495      
Seniors Housing Operating | San Francisco, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,920      
Initial Cost of Buildings & Improvements 91,639      
Cost Capitalized Subsequent to Acquisition 12,609      
Carrying Amount of Land 5,920      
Carrying Amount of Buildings and Improvements 104,248      
Accumulated Depreciation 13,874      
Seniors Housing Operating | San Francisco, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,800      
Initial Cost of Buildings & Improvements 77,214      
Cost Capitalized Subsequent to Acquisition 9,969      
Carrying Amount of Land 11,800      
Carrying Amount of Buildings and Improvements 87,183      
Accumulated Depreciation 11,932      
Seniors Housing Operating | San Gabriel, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,120      
Initial Cost of Buildings & Improvements 15,566      
Cost Capitalized Subsequent to Acquisition 948      
Carrying Amount of Land 3,138      
Carrying Amount of Buildings and Improvements 16,496      
Accumulated Depreciation 3,797      
Seniors Housing Operating | San Jose, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,850      
Initial Cost of Buildings & Improvements 35,098      
Cost Capitalized Subsequent to Acquisition 811      
Carrying Amount of Land 2,858      
Carrying Amount of Buildings and Improvements 35,901      
Accumulated Depreciation 8,000      
Seniors Housing Operating | San Jose, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,280      
Initial Cost of Buildings & Improvements 46,823      
Cost Capitalized Subsequent to Acquisition 3,149      
Carrying Amount of Land 3,280      
Carrying Amount of Buildings and Improvements 49,972      
Accumulated Depreciation 11,218      
Seniors Housing Operating | San Jose, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 11,900      
Initial Cost of Buildings & Improvements 27,647      
Cost Capitalized Subsequent to Acquisition 4,820      
Carrying Amount of Land 11,900      
Carrying Amount of Buildings and Improvements 32,467      
Accumulated Depreciation 4,801      
Seniors Housing Operating | San Juan Capistrano, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,390      
Initial Cost of Buildings & Improvements 6,942      
Cost Capitalized Subsequent to Acquisition 1,450      
Carrying Amount of Land 1,390      
Carrying Amount of Buildings and Improvements 8,392      
Accumulated Depreciation 3,797      
Seniors Housing Operating | San Rafael, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,620      
Initial Cost of Buildings & Improvements 27,392      
Cost Capitalized Subsequent to Acquisition 2,858      
Carrying Amount of Land 1,832      
Carrying Amount of Buildings and Improvements 30,038      
Accumulated Depreciation 3,412      
Seniors Housing Operating | San Ramon, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 8,700      
Initial Cost of Buildings & Improvements 72,223      
Cost Capitalized Subsequent to Acquisition 9,628      
Carrying Amount of Land 8,700      
Carrying Amount of Buildings and Improvements 81,851      
Accumulated Depreciation 11,263      
Seniors Housing Operating | Sandy Springs, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,214      
Initial Cost of Buildings & Improvements 8,360      
Cost Capitalized Subsequent to Acquisition 1,307      
Carrying Amount of Land 2,220      
Carrying Amount of Buildings and Improvements 9,661      
Accumulated Depreciation 2,733      
Seniors Housing Operating | Santa Maria, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,050      
Initial Cost of Buildings & Improvements 50,658      
Cost Capitalized Subsequent to Acquisition 3,231      
Carrying Amount of Land 6,089      
Carrying Amount of Buildings and Improvements 53,850      
Accumulated Depreciation 14,846      
Seniors Housing Operating | Santa Monica, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 18,727      
Initial Cost of Land 5,250      
Initial Cost of Buildings & Improvements 28,340      
Cost Capitalized Subsequent to Acquisition 950      
Carrying Amount of Land 5,263      
Carrying Amount of Buildings and Improvements 29,277      
Accumulated Depreciation 6,184      
Seniors Housing Operating | Santa Rosa, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 26,273      
Cost Capitalized Subsequent to Acquisition 3,303      
Carrying Amount of Land 2,250      
Carrying Amount of Buildings and Improvements 29,576      
Accumulated Depreciation 3,623      
Seniors Housing Operating | Saskatoon, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,840      
Initial Cost of Land 981      
Initial Cost of Buildings & Improvements 13,905      
Cost Capitalized Subsequent to Acquisition 501      
Carrying Amount of Land 995      
Carrying Amount of Buildings and Improvements 14,392      
Accumulated Depreciation 2,916      
Seniors Housing Operating | Saskatoon, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 13,125      
Initial Cost of Land 1,382      
Initial Cost of Buildings & Improvements 17,609      
Cost Capitalized Subsequent to Acquisition 766      
Carrying Amount of Land 1,403      
Carrying Amount of Buildings and Improvements 18,354      
Accumulated Depreciation 3,632      
Seniors Housing Operating | Schaumburg, IL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,460      
Initial Cost of Buildings & Improvements 22,863      
Cost Capitalized Subsequent to Acquisition 1,175      
Carrying Amount of Land 2,497      
Carrying Amount of Buildings and Improvements 24,001      
Accumulated Depreciation 5,884      
Seniors Housing Operating | Scottsdale, AZ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,500      
Initial Cost of Buildings & Improvements 3,890      
Cost Capitalized Subsequent to Acquisition 1,664      
Carrying Amount of Land 2,500      
Carrying Amount of Buildings and Improvements 5,554      
Accumulated Depreciation 1,614      
Seniors Housing Operating | Seal Beach, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,204      
Initial Cost of Buildings & Improvements 72,954      
Cost Capitalized Subsequent to Acquisition 2,078      
Carrying Amount of Land 6,271      
Carrying Amount of Buildings and Improvements 74,965      
Accumulated Depreciation 19,259      
Seniors Housing Operating | Seattle, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,190      
Initial Cost of Buildings & Improvements 9,350      
Cost Capitalized Subsequent to Acquisition 748      
Carrying Amount of Land 5,199      
Carrying Amount of Buildings and Improvements 10,089      
Accumulated Depreciation 3,616      
Seniors Housing Operating | Seattle, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 27,180      
Initial Cost of Land 10,670      
Initial Cost of Buildings & Improvements 37,291      
Cost Capitalized Subsequent to Acquisition 1,094      
Carrying Amount of Land 10,700      
Carrying Amount of Buildings and Improvements 38,355      
Accumulated Depreciation 12,353      
Seniors Housing Operating | Seattle, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 48,540      
Initial Cost of Land 6,790      
Initial Cost of Buildings & Improvements 85,369      
Cost Capitalized Subsequent to Acquisition 3,258      
Carrying Amount of Land 6,825      
Carrying Amount of Buildings and Improvements 88,592      
Accumulated Depreciation 20,335      
Seniors Housing Operating | Seattle, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,150      
Initial Cost of Buildings & Improvements 19,887      
Cost Capitalized Subsequent to Acquisition 1,284      
Carrying Amount of Land 1,153      
Carrying Amount of Buildings and Improvements 21,168      
Accumulated Depreciation 2,724      
Seniors Housing Operating | Selbyville, DE        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 750      
Initial Cost of Buildings & Improvements 25,912      
Cost Capitalized Subsequent to Acquisition 508      
Carrying Amount of Land 769      
Carrying Amount of Buildings and Improvements 26,401      
Accumulated Depreciation 5,564      
Seniors Housing Operating | Sevenoaks, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,181      
Initial Cost of Buildings & Improvements 40,240      
Cost Capitalized Subsequent to Acquisition 4,176      
Carrying Amount of Land 6,390      
Carrying Amount of Buildings and Improvements 44,207      
Accumulated Depreciation 10,318      
Seniors Housing Operating | Severna Park, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 67,623      
Cost Capitalized Subsequent to Acquisition 5,574      
Carrying Amount of Land 24      
Carrying Amount of Buildings and Improvements 73,173      
Accumulated Depreciation 8,947      
Seniors Housing Operating | Shelburne, VT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 31,041      
Cost Capitalized Subsequent to Acquisition 1,966      
Carrying Amount of Land 777      
Carrying Amount of Buildings and Improvements 32,950      
Accumulated Depreciation 8,191      
Seniors Housing Operating | Shelby Township, MI        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Buildings & Improvements 26,344      
Cost Capitalized Subsequent to Acquisition 1,439      
Carrying Amount of Land 1,105      
Carrying Amount of Buildings and Improvements 27,718      
Accumulated Depreciation 5,566      
Seniors Housing Operating | Shelton, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,246      
Initial Cost of Buildings & Improvements 33,967      
Cost Capitalized Subsequent to Acquisition 42      
Carrying Amount of Land 2,246      
Carrying Amount of Buildings and Improvements 34,009      
Accumulated Depreciation 3,424      
Seniors Housing Operating | Shrewsbury, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,120      
Initial Cost of Buildings & Improvements 38,116      
Cost Capitalized Subsequent to Acquisition 1,244      
Carrying Amount of Land 2,138      
Carrying Amount of Buildings and Improvements 39,342      
Accumulated Depreciation 8,247      
Seniors Housing Operating | Shrewsbury, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 26,824      
Cost Capitalized Subsequent to Acquisition 1,397      
Carrying Amount of Land 956      
Carrying Amount of Buildings and Improvements 28,215      
Accumulated Depreciation 4,209      
Seniors Housing Operating | Sidcup, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,446      
Initial Cost of Buildings & Improvements 56,570      
Cost Capitalized Subsequent to Acquisition 3,312      
Carrying Amount of Land 7,714      
Carrying Amount of Buildings and Improvements 59,614      
Accumulated Depreciation 15,051      
Seniors Housing Operating | Simi Valley, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,200      
Initial Cost of Buildings & Improvements 16,664      
Cost Capitalized Subsequent to Acquisition 1,092      
Carrying Amount of Land 3,298      
Carrying Amount of Buildings and Improvements 17,658      
Accumulated Depreciation 4,909      
Seniors Housing Operating | Simi Valley, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,510      
Initial Cost of Buildings & Improvements 51,406      
Cost Capitalized Subsequent to Acquisition 8,073      
Carrying Amount of Land 5,510      
Carrying Amount of Buildings and Improvements 59,479      
Accumulated Depreciation 8,314      
Seniors Housing Operating | Solihull, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,070      
Initial Cost of Buildings & Improvements 43,297      
Cost Capitalized Subsequent to Acquisition 4,211      
Carrying Amount of Land 5,241      
Carrying Amount of Buildings and Improvements 47,337      
Accumulated Depreciation 10,579      
Seniors Housing Operating | Solihull, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,571      
Initial Cost of Buildings & Improvements 26,053      
Cost Capitalized Subsequent to Acquisition 1,429      
Carrying Amount of Land 3,692      
Carrying Amount of Buildings and Improvements 27,361      
Accumulated Depreciation 6,320      
Seniors Housing Operating | Solihull, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,851      
Initial Cost of Buildings & Improvements 10,585      
Cost Capitalized Subsequent to Acquisition 499      
Carrying Amount of Land 1,913      
Carrying Amount of Buildings and Improvements 11,022      
Accumulated Depreciation 770      
Seniors Housing Operating | Sonning, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,644      
Initial Cost of Buildings & Improvements 42,155      
Cost Capitalized Subsequent to Acquisition 2,660      
Carrying Amount of Land 5,853      
Carrying Amount of Buildings and Improvements 44,606      
Accumulated Depreciation 9,317      
Seniors Housing Operating | Sonoma, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,100      
Initial Cost of Buildings & Improvements 18,400      
Cost Capitalized Subsequent to Acquisition 1,773      
Carrying Amount of Land 1,109      
Carrying Amount of Buildings and Improvements 20,164      
Accumulated Depreciation 7,332      
Seniors Housing Operating | Sonoma, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,820      
Initial Cost of Buildings & Improvements 21,890      
Cost Capitalized Subsequent to Acquisition 2,683      
Carrying Amount of Land 2,820      
Carrying Amount of Buildings and Improvements 24,573      
Accumulated Depreciation 3,043      
Seniors Housing Operating | St. Albert, AB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,432      
Initial Cost of Land 1,145      
Initial Cost of Buildings & Improvements 17,863      
Cost Capitalized Subsequent to Acquisition 1,854      
Carrying Amount of Land 1,185      
Carrying Amount of Buildings and Improvements 19,677      
Accumulated Depreciation 5,098      
Seniors Housing Operating | St. John's, NL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,444      
Initial Cost of Land 706      
Initial Cost of Buildings & Improvements 11,765      
Cost Capitalized Subsequent to Acquisition 73      
Carrying Amount of Land 711      
Carrying Amount of Buildings and Improvements 11,833      
Accumulated Depreciation 1,575      
Seniors Housing Operating | Stittsville, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,237      
Initial Cost of Land 1,175      
Initial Cost of Buildings & Improvements 17,397      
Cost Capitalized Subsequent to Acquisition 753      
Carrying Amount of Land 1,192      
Carrying Amount of Buildings and Improvements 18,133      
Accumulated Depreciation 3,630      
Seniors Housing Operating | Stockport, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,369      
Initial Cost of Buildings & Improvements 25,018      
Cost Capitalized Subsequent to Acquisition 1,329      
Carrying Amount of Land 4,521      
Carrying Amount of Buildings and Improvements 26,195      
Accumulated Depreciation 6,471      
Seniors Housing Operating | Stockton, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,280      
Initial Cost of Buildings & Improvements 5,983      
Cost Capitalized Subsequent to Acquisition 513      
Carrying Amount of Land 2,372      
Carrying Amount of Buildings and Improvements 6,404      
Accumulated Depreciation 2,006      
Seniors Housing Operating | Studio City, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,006      
Initial Cost of Buildings & Improvements 25,307      
Cost Capitalized Subsequent to Acquisition 1,151      
Carrying Amount of Land 4,109      
Carrying Amount of Buildings and Improvements 26,355      
Accumulated Depreciation 6,453      
Seniors Housing Operating | Sugar Land, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 31,423      
Cost Capitalized Subsequent to Acquisition 1,339      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 32,762      
Accumulated Depreciation 8,143      
Seniors Housing Operating | Sugar Land, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,272      
Initial Cost of Buildings & Improvements 60,493      
Cost Capitalized Subsequent to Acquisition 6,530      
Carrying Amount of Land 4,272      
Carrying Amount of Buildings and Improvements 67,023      
Accumulated Depreciation 4,864      
Seniors Housing Operating | Sun City, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 20,951      
Initial Cost of Land 6,521      
Initial Cost of Buildings & Improvements 48,476      
Cost Capitalized Subsequent to Acquisition 5,134      
Carrying Amount of Land 6,648      
Carrying Amount of Buildings and Improvements 53,483      
Accumulated Depreciation 11,537      
Seniors Housing Operating | Sun City, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 23,606      
Initial Cost of Land 5,040      
Initial Cost of Buildings & Improvements 50,923      
Cost Capitalized Subsequent to Acquisition 4,577      
Carrying Amount of Land 5,369      
Carrying Amount of Buildings and Improvements 55,171      
Accumulated Depreciation 10,639      
Seniors Housing Operating | Sunnyvale, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,420      
Initial Cost of Buildings & Improvements 41,682      
Cost Capitalized Subsequent to Acquisition 2,155      
Carrying Amount of Land 5,420      
Carrying Amount of Buildings and Improvements 43,837      
Accumulated Depreciation 10,239      
Seniors Housing Operating | Surrey, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,323      
Initial Cost of Land 3,605      
Initial Cost of Buildings & Improvements 18,818      
Cost Capitalized Subsequent to Acquisition 1,018      
Carrying Amount of Land 3,658      
Carrying Amount of Buildings and Improvements 19,783      
Accumulated Depreciation 5,725      
Seniors Housing Operating | Surrey, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 15,142      
Initial Cost of Land 4,552      
Initial Cost of Buildings & Improvements 22,338      
Cost Capitalized Subsequent to Acquisition 1,332      
Carrying Amount of Land 4,631      
Carrying Amount of Buildings and Improvements 23,591      
Accumulated Depreciation 7,190      
Seniors Housing Operating | Sutton, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,096      
Initial Cost of Buildings & Improvements 14,532      
Cost Capitalized Subsequent to Acquisition 730      
Carrying Amount of Land 4,234      
Carrying Amount of Buildings and Improvements 15,124      
Accumulated Depreciation 851      
Seniors Housing Operating | Suwanee, GA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,560      
Initial Cost of Buildings & Improvements 11,538      
Cost Capitalized Subsequent to Acquisition 1,665      
Carrying Amount of Land 1,560      
Carrying Amount of Buildings and Improvements 13,203      
Accumulated Depreciation 3,281      
Seniors Housing Operating | Sway, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,145      
Initial Cost of Buildings & Improvements 15,508      
Cost Capitalized Subsequent to Acquisition 1,113      
Carrying Amount of Land 4,334      
Carrying Amount of Buildings and Improvements 16,432      
Accumulated Depreciation 3,004      
Seniors Housing Operating | Swift Current, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,871      
Initial Cost of Land 492      
Initial Cost of Buildings & Improvements 10,119      
Cost Capitalized Subsequent to Acquisition 455      
Carrying Amount of Land 505      
Carrying Amount of Buildings and Improvements 10,561      
Accumulated Depreciation 2,324      
Seniors Housing Operating | Tacoma, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,640      
Initial Cost of Land 2,400      
Initial Cost of Buildings & Improvements 35,053      
Cost Capitalized Subsequent to Acquisition 1,276      
Carrying Amount of Land 2,493      
Carrying Amount of Buildings and Improvements 36,236      
Accumulated Depreciation 8,057      
Seniors Housing Operating | Tacoma, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,535      
Initial Cost of Buildings & Improvements 6,068      
Cost Capitalized Subsequent to Acquisition 67      
Carrying Amount of Land 1,537      
Carrying Amount of Buildings and Improvements 6,133      
Accumulated Depreciation 1,095      
Seniors Housing Operating | Tacoma, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,170      
Initial Cost of Buildings & Improvements 73,377      
Cost Capitalized Subsequent to Acquisition 12,917      
Carrying Amount of Land 4,170      
Carrying Amount of Buildings and Improvements 86,294      
Accumulated Depreciation 11,797      
Seniors Housing Operating | Tampa, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 69,330      
Initial Cost of Land 4,910      
Initial Cost of Buildings & Improvements 114,148      
Cost Capitalized Subsequent to Acquisition 5,229      
Carrying Amount of Land 4,996      
Carrying Amount of Buildings and Improvements 119,291      
Accumulated Depreciation 20,181      
Seniors Housing Operating | Tewksbury, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,350      
Initial Cost of Buildings & Improvements 24,118      
Cost Capitalized Subsequent to Acquisition 2,172      
Carrying Amount of Land 2,350      
Carrying Amount of Buildings and Improvements 26,290      
Accumulated Depreciation 3,205      
Seniors Housing Operating | The Woodlands, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 12,379      
Cost Capitalized Subsequent to Acquisition 679      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 13,058      
Accumulated Depreciation 3,238      
Seniors Housing Operating | Toledo, OH        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,040      
Initial Cost of Buildings & Improvements 47,129      
Cost Capitalized Subsequent to Acquisition 3,722      
Carrying Amount of Land 2,144      
Carrying Amount of Buildings and Improvements 50,747      
Accumulated Depreciation 15,040      
Seniors Housing Operating | Toms River, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,610      
Initial Cost of Buildings & Improvements 34,627      
Cost Capitalized Subsequent to Acquisition 1,077      
Carrying Amount of Land 1,681      
Carrying Amount of Buildings and Improvements 35,633      
Accumulated Depreciation 7,529      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,086      
Initial Cost of Land 2,927      
Initial Cost of Buildings & Improvements 20,713      
Cost Capitalized Subsequent to Acquisition 1,635      
Carrying Amount of Land 2,997      
Carrying Amount of Buildings and Improvements 22,278      
Accumulated Depreciation 3,323      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 8,268      
Initial Cost of Land 5,082      
Initial Cost of Buildings & Improvements 25,493      
Cost Capitalized Subsequent to Acquisition 1,375      
Carrying Amount of Land 5,178      
Carrying Amount of Buildings and Improvements 26,772      
Accumulated Depreciation 5,294      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,478      
Initial Cost of Land 2,008      
Initial Cost of Buildings & Improvements 19,620      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,008      
Carrying Amount of Buildings and Improvements 19,620      
Accumulated Depreciation 3,033      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 36,296      
Initial Cost of Land 5,132      
Initial Cost of Buildings & Improvements 41,657      
Cost Capitalized Subsequent to Acquisition 2,931      
Carrying Amount of Land 5,209      
Carrying Amount of Buildings and Improvements 44,511      
Accumulated Depreciation 10,383      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,268      
Initial Cost of Land 2,480      
Initial Cost of Buildings & Improvements 7,571      
Cost Capitalized Subsequent to Acquisition 492      
Carrying Amount of Land 2,527      
Carrying Amount of Buildings and Improvements 8,016      
Accumulated Depreciation 1,724      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 1,217      
Initial Cost of Land 1,079      
Initial Cost of Buildings & Improvements 5,364      
Cost Capitalized Subsequent to Acquisition 269      
Carrying Amount of Land 1,095      
Carrying Amount of Buildings and Improvements 5,617      
Accumulated Depreciation 1,246      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,531      
Initial Cost of Land 2,513      
Initial Cost of Buildings & Improvements 19,695      
Cost Capitalized Subsequent to Acquisition 969      
Carrying Amount of Land 2,583      
Carrying Amount of Buildings and Improvements 20,594      
Accumulated Depreciation 3,845      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,407      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 32,757      
Cost Capitalized Subsequent to Acquisition 1,488      
Carrying Amount of Land 3,456      
Carrying Amount of Buildings and Improvements 34,189      
Accumulated Depreciation 7,774      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 751      
Initial Cost of Land 1,361      
Initial Cost of Buildings & Improvements 2,915      
Cost Capitalized Subsequent to Acquisition 303      
Carrying Amount of Land 1,414      
Carrying Amount of Buildings and Improvements 3,165      
Accumulated Depreciation 1,155      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 5,685      
Initial Cost of Land 1,447      
Initial Cost of Buildings & Improvements 3,918      
Cost Capitalized Subsequent to Acquisition 358      
Carrying Amount of Land 1,494      
Carrying Amount of Buildings and Improvements 4,229      
Accumulated Depreciation 1,147      
Seniors Housing Operating | Toronto, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 30,679      
Initial Cost of Land 5,304      
Initial Cost of Buildings & Improvements 53,488      
Cost Capitalized Subsequent to Acquisition 2,130      
Carrying Amount of Land 5,387      
Carrying Amount of Buildings and Improvements 55,535      
Accumulated Depreciation 15,694      
Seniors Housing Operating | Torrance, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,497      
Initial Cost of Buildings & Improvements 73,138      
Cost Capitalized Subsequent to Acquisition 16      
Carrying Amount of Land 3,497      
Carrying Amount of Buildings and Improvements 73,154      
Accumulated Depreciation 4,639      
Seniors Housing Operating | Tulsa, OK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,330      
Initial Cost of Buildings & Improvements 21,285      
Cost Capitalized Subsequent to Acquisition 4,417      
Carrying Amount of Land 1,362      
Carrying Amount of Buildings and Improvements 25,670      
Accumulated Depreciation 7,149      
Seniors Housing Operating | Tulsa, OK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 20,861      
Cost Capitalized Subsequent to Acquisition 3,934      
Carrying Amount of Land 1,581      
Carrying Amount of Buildings and Improvements 24,714      
Accumulated Depreciation 7,228      
Seniors Housing Operating | Tustin, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 840      
Initial Cost of Buildings & Improvements 15,299      
Cost Capitalized Subsequent to Acquisition 744      
Carrying Amount of Land 840      
Carrying Amount of Buildings and Improvements 16,043      
Accumulated Depreciation 3,784      
Seniors Housing Operating | Upland, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,160      
Initial Cost of Buildings & Improvements 42,596      
Cost Capitalized Subsequent to Acquisition 55      
Carrying Amount of Land 3,160      
Carrying Amount of Buildings and Improvements 42,651      
Accumulated Depreciation 5,414      
Seniors Housing Operating | Upper Providence, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,900      
Initial Cost of Buildings & Improvements 28,195      
Cost Capitalized Subsequent to Acquisition 37      
Carrying Amount of Land 1,900      
Carrying Amount of Buildings and Improvements 28,232      
Accumulated Depreciation 2,719      
Seniors Housing Operating | Upper St Claire, PA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,102      
Initial Cost of Buildings & Improvements 13,455      
Cost Capitalized Subsequent to Acquisition 1,396      
Carrying Amount of Land 1,125      
Carrying Amount of Buildings and Improvements 14,828      
Accumulated Depreciation 3,714      
Seniors Housing Operating | Vacaville, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 17,100      
Cost Capitalized Subsequent to Acquisition 1,756      
Carrying Amount of Land 907      
Carrying Amount of Buildings and Improvements 18,849      
Accumulated Depreciation 7,022      
Seniors Housing Operating | Vallejo, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,000      
Initial Cost of Buildings & Improvements 18,000      
Cost Capitalized Subsequent to Acquisition 2,476      
Carrying Amount of Land 4,030      
Carrying Amount of Buildings and Improvements 20,446      
Accumulated Depreciation 7,573      
Seniors Housing Operating | Vallejo, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,330      
Initial Cost of Buildings & Improvements 15,407      
Cost Capitalized Subsequent to Acquisition 390      
Carrying Amount of Land 2,330      
Carrying Amount of Buildings and Improvements 15,797      
Accumulated Depreciation 4,505      
Seniors Housing Operating | Vancouver, WA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 19,042      
Cost Capitalized Subsequent to Acquisition 438      
Carrying Amount of Land 1,821      
Carrying Amount of Buildings and Improvements 19,479      
Accumulated Depreciation 5,299      
Seniors Housing Operating | Vancouver, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,282      
Initial Cost of Buildings & Improvements 6,572      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 7,282      
Carrying Amount of Buildings and Improvements 6,572      
Accumulated Depreciation 5,332      
Seniors Housing Operating | Vankleek Hill, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 750      
Initial Cost of Land 389      
Initial Cost of Buildings & Improvements 2,960      
Cost Capitalized Subsequent to Acquisition 293      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 3,242      
Accumulated Depreciation 820      
Seniors Housing Operating | Vaudreuil, QC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,822      
Initial Cost of Land 1,852      
Initial Cost of Buildings & Improvements 14,214      
Cost Capitalized Subsequent to Acquisition 546      
Carrying Amount of Land 1,829      
Carrying Amount of Buildings and Improvements 14,783      
Accumulated Depreciation 2,234      
Seniors Housing Operating | Venice, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 64,425      
Initial Cost of Land 6,820      
Initial Cost of Buildings & Improvements 100,501      
Cost Capitalized Subsequent to Acquisition 4,362      
Carrying Amount of Land 6,892      
Carrying Amount of Buildings and Improvements 104,791      
Accumulated Depreciation 19,357      
Seniors Housing Operating | Vero Beach, FL        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,930      
Initial Cost of Buildings & Improvements 40,070      
Cost Capitalized Subsequent to Acquisition 25,658      
Carrying Amount of Land 2,930      
Carrying Amount of Buildings and Improvements 65,728      
Accumulated Depreciation 19,456      
Seniors Housing Operating | Victoria, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,833      
Initial Cost of Land 2,856      
Initial Cost of Buildings & Improvements 18,038      
Cost Capitalized Subsequent to Acquisition 565      
Carrying Amount of Land 2,898      
Carrying Amount of Buildings and Improvements 18,561      
Accumulated Depreciation 4,657      
Seniors Housing Operating | Victoria, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,299      
Initial Cost of Land 3,681      
Initial Cost of Buildings & Improvements 15,774      
Cost Capitalized Subsequent to Acquisition 555      
Carrying Amount of Land 3,736      
Carrying Amount of Buildings and Improvements 16,274      
Accumulated Depreciation 4,244      
Seniors Housing Operating | Victoria, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 7,064      
Initial Cost of Land 2,476      
Initial Cost of Buildings & Improvements 15,379      
Cost Capitalized Subsequent to Acquisition 1,020      
Carrying Amount of Land 2,516      
Carrying Amount of Buildings and Improvements 16,359      
Accumulated Depreciation 2,115      
Seniors Housing Operating | Virginia Water, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,106      
Initial Cost of Buildings & Improvements 29,937      
Cost Capitalized Subsequent to Acquisition 5,937      
Carrying Amount of Land 5,629      
Carrying Amount of Buildings and Improvements 37,351      
Accumulated Depreciation 8,494      
Seniors Housing Operating | Voorhees, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 24,312      
Cost Capitalized Subsequent to Acquisition 1,821      
Carrying Amount of Land 3,854      
Carrying Amount of Buildings and Improvements 25,979      
Accumulated Depreciation 4,025      
Seniors Housing Operating | Wall, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,650      
Initial Cost of Buildings & Improvements 25,350      
Cost Capitalized Subsequent to Acquisition 2,679      
Carrying Amount of Land 1,692      
Carrying Amount of Buildings and Improvements 27,987      
Accumulated Depreciation 5,356      
Seniors Housing Operating | Walnut Creek, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 12,467      
Cost Capitalized Subsequent to Acquisition 2,280      
Carrying Amount of Land 3,808      
Carrying Amount of Buildings and Improvements 14,639      
Accumulated Depreciation 4,072      
Seniors Housing Operating | Walnut Creek, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 10,320      
Initial Cost of Buildings & Improvements 100,890      
Cost Capitalized Subsequent to Acquisition 15,190      
Carrying Amount of Land 10,320      
Carrying Amount of Buildings and Improvements 116,080      
Accumulated Depreciation 15,633      
Seniors Housing Operating | Waltham, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,462      
Initial Cost of Buildings & Improvements 40,062      
Cost Capitalized Subsequent to Acquisition 1,457      
Carrying Amount of Land 2,551      
Carrying Amount of Buildings and Improvements 41,430      
Accumulated Depreciation 6,700      
Seniors Housing Operating | Washington, DC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 30,162      
Initial Cost of Land 4,000      
Initial Cost of Buildings & Improvements 69,154      
Cost Capitalized Subsequent to Acquisition 3,157      
Carrying Amount of Land 4,004      
Carrying Amount of Buildings and Improvements 72,307      
Accumulated Depreciation 14,549      
Seniors Housing Operating | Watchung, NJ        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,920      
Initial Cost of Buildings & Improvements 24,880      
Cost Capitalized Subsequent to Acquisition 1,348      
Carrying Amount of Land 2,048      
Carrying Amount of Buildings and Improvements 26,100      
Accumulated Depreciation 5,131      
Seniors Housing Operating | Wayland, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,207      
Initial Cost of Buildings & Improvements 27,462      
Cost Capitalized Subsequent to Acquisition 2,157      
Carrying Amount of Land 1,334      
Carrying Amount of Buildings and Improvements 29,492      
Accumulated Depreciation 6,527      
Seniors Housing Operating | Webster Groves, MO        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,790      
Initial Cost of Buildings & Improvements 15,425      
Cost Capitalized Subsequent to Acquisition 2,391      
Carrying Amount of Land 1,793      
Carrying Amount of Buildings and Improvements 17,813      
Accumulated Depreciation 4,543      
Seniors Housing Operating | Welland, ON        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 6,041      
Initial Cost of Land 983      
Initial Cost of Buildings & Improvements 7,530      
Cost Capitalized Subsequent to Acquisition 94      
Carrying Amount of Land 969      
Carrying Amount of Buildings and Improvements 7,638      
Accumulated Depreciation 1,060      
Seniors Housing Operating | Wellesley, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 4,690      
Initial Cost of Buildings & Improvements 77,462      
Cost Capitalized Subsequent to Acquisition 219      
Carrying Amount of Land 4,690      
Carrying Amount of Buildings and Improvements 77,681      
Accumulated Depreciation 11,776      
Seniors Housing Operating | West Babylon, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,960      
Initial Cost of Buildings & Improvements 47,085      
Cost Capitalized Subsequent to Acquisition 2,224      
Carrying Amount of Land 3,960      
Carrying Amount of Buildings and Improvements 49,309      
Accumulated Depreciation 9,640      
Seniors Housing Operating | West Bloomfield, MI        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Buildings & Improvements 12,300      
Cost Capitalized Subsequent to Acquisition 835      
Carrying Amount of Land 1,094      
Carrying Amount of Buildings and Improvements 13,081      
Accumulated Depreciation 2,977      
Seniors Housing Operating | West Hills, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,600      
Initial Cost of Buildings & Improvements 7,521      
Cost Capitalized Subsequent to Acquisition 1,545      
Carrying Amount of Land 2,636      
Carrying Amount of Buildings and Improvements 9,030      
Accumulated Depreciation 2,681      
Seniors Housing Operating | West Vancouver, BC        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 17,668      
Initial Cost of Land 7,059      
Initial Cost of Buildings & Improvements 28,155      
Cost Capitalized Subsequent to Acquisition 1,997      
Carrying Amount of Land 7,168      
Carrying Amount of Buildings and Improvements 30,043      
Accumulated Depreciation 7,104      
Seniors Housing Operating | Westbourne, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 5,441      
Initial Cost of Buildings & Improvements 41,420      
Cost Capitalized Subsequent to Acquisition 3,300      
Carrying Amount of Land 5,627      
Carrying Amount of Buildings and Improvements 44,534      
Accumulated Depreciation 9,612      
Seniors Housing Operating | Westford, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 32,607      
Cost Capitalized Subsequent to Acquisition 319      
Carrying Amount of Land 1,468      
Carrying Amount of Buildings and Improvements 32,898      
Accumulated Depreciation 4,202      
Seniors Housing Operating | Weston, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,160      
Initial Cost of Buildings & Improvements 6,200      
Cost Capitalized Subsequent to Acquisition 1,274      
Carrying Amount of Land 1,160      
Carrying Amount of Buildings and Improvements 7,474      
Accumulated Depreciation 1,583      
Seniors Housing Operating | Westworth Village, TX        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 31,296      
Cost Capitalized Subsequent to Acquisition 60      
Carrying Amount of Land 2,060      
Carrying Amount of Buildings and Improvements 31,356      
Accumulated Depreciation 3,346      
Seniors Housing Operating | Weybridge, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 7,899      
Initial Cost of Buildings & Improvements 48,240      
Cost Capitalized Subsequent to Acquisition 2,386      
Carrying Amount of Land 8,166      
Carrying Amount of Buildings and Improvements 50,359      
Accumulated Depreciation 12,363      
Seniors Housing Operating | Weymouth, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,591      
Initial Cost of Buildings & Improvements 16,551      
Cost Capitalized Subsequent to Acquisition 880      
Carrying Amount of Land 2,714      
Carrying Amount of Buildings and Improvements 17,308      
Accumulated Depreciation 2,114      
Seniors Housing Operating | White Oak, MD        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,304      
Initial Cost of Buildings & Improvements 24,768      
Cost Capitalized Subsequent to Acquisition 1,936      
Carrying Amount of Land 2,316      
Carrying Amount of Buildings and Improvements 26,692      
Accumulated Depreciation 5,465      
Seniors Housing Operating | Wilmington, DE        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,040      
Initial Cost of Buildings & Improvements 23,338      
Cost Capitalized Subsequent to Acquisition 1,771      
Carrying Amount of Land 1,129      
Carrying Amount of Buildings and Improvements 25,020      
Accumulated Depreciation 5,281      
Seniors Housing Operating | Winchester, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 6,009      
Initial Cost of Buildings & Improvements 29,405      
Cost Capitalized Subsequent to Acquisition 1,472      
Carrying Amount of Land 6,220      
Carrying Amount of Buildings and Improvements 30,666      
Accumulated Depreciation 7,194      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 11,756      
Initial Cost of Land 1,960      
Initial Cost of Buildings & Improvements 38,612      
Cost Capitalized Subsequent to Acquisition 2,244      
Carrying Amount of Land 2,058      
Carrying Amount of Buildings and Improvements 40,758      
Accumulated Depreciation 12,275      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 14,961      
Initial Cost of Land 1,276      
Initial Cost of Buildings & Improvements 21,732      
Cost Capitalized Subsequent to Acquisition 1,083      
Carrying Amount of Land 1,419      
Carrying Amount of Buildings and Improvements 22,672      
Accumulated Depreciation 4,820      
Seniors Housing Operating | Winnipeg, MB        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 12,124      
Initial Cost of Land 1,317      
Initial Cost of Buildings & Improvements 15,609      
Cost Capitalized Subsequent to Acquisition 1,864      
Carrying Amount of Land 1,346      
Carrying Amount of Buildings and Improvements 17,444      
Accumulated Depreciation 3,116      
Seniors Housing Operating | Woking, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,990      
Initial Cost of Buildings & Improvements 12,523      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,990      
Carrying Amount of Buildings and Improvements 12,523      
Accumulated Depreciation 363      
Seniors Housing Operating | Wolverhampton, UK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 2,941      
Initial Cost of Buildings & Improvements 8,922      
Cost Capitalized Subsequent to Acquisition 724      
Carrying Amount of Land 3,047      
Carrying Amount of Buildings and Improvements 9,540      
Accumulated Depreciation 3,114      
Seniors Housing Operating | Woodbridge, CT        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,370      
Initial Cost of Buildings & Improvements 14,219      
Cost Capitalized Subsequent to Acquisition 1,594      
Carrying Amount of Land 1,426      
Carrying Amount of Buildings and Improvements 15,757      
Accumulated Depreciation 5,754      
Seniors Housing Operating | Woodland Hills, CA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 20,478      
Cost Capitalized Subsequent to Acquisition 1,079      
Carrying Amount of Land 3,447      
Carrying Amount of Buildings and Improvements 21,510      
Accumulated Depreciation 5,278      
Seniors Housing Operating | Worcester, MA        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 1,140      
Initial Cost of Buildings & Improvements 21,664      
Cost Capitalized Subsequent to Acquisition 1,382      
Carrying Amount of Land 1,166      
Carrying Amount of Buildings and Improvements 23,020      
Accumulated Depreciation 6,192      
Seniors Housing Operating | Yarmouth, ME        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 450      
Initial Cost of Buildings & Improvements 27,711      
Cost Capitalized Subsequent to Acquisition 1,410      
Carrying Amount of Land 484      
Carrying Amount of Buildings and Improvements 29,087      
Accumulated Depreciation 7,458      
Seniors Housing Operating | Yonkers, NY        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 3,962      
Initial Cost of Buildings & Improvements 50,107      
Cost Capitalized Subsequent to Acquisition 2,111      
Carrying Amount of Land 3,967      
Carrying Amount of Buildings and Improvements 52,213      
Accumulated Depreciation 10,824      
Seniors Housing Operating | Yorkton, SK        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 3,085      
Initial Cost of Land 463      
Initial Cost of Buildings & Improvements 8,760      
Cost Capitalized Subsequent to Acquisition 340      
Carrying Amount of Land 473      
Carrying Amount of Buildings and Improvements 9,090      
Accumulated Depreciation $ 2,004