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Real Estate and Accumulated Depreciation (Schedule III Real Estate and Accumulated Depreciation, Triple Net) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 3,472,255      
Initial Cost of Land 2,572,238      
Initial Cost of Buildings & Improvements 27,040,378      
Cost Capitalized Subsequent to Acquisition 1,373,415      
Carrying Amount of Land 2,563,445      
Carrying Amount of Buildings and Improvements 27,302,045      
Accumulated Depreciation 3,796,297 $ 3,020,908 $ 2,386,658 $ 1,555,055
Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 554,014      
Initial Cost of Land 1,003,748      
Initial Cost of Buildings & Improvements 10,800,837      
Cost Capitalized Subsequent to Acquisition 600,549      
Carrying Amount of Land 1,032,860      
Carrying Amount of Buildings and Improvements 11,372,276      
Accumulated Depreciation [1] 1,539,033      
Triple Net [Member] | Abilene, TX, ABL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 20,987      
Cost Capitalized Subsequent to Acquisition 40      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 21,027      
Accumulated Depreciation [1] $ 844      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2006      
Triple Net [Member] | Abilene, TX, ABL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 990      
Initial Cost of Buildings & Improvements 8,187      
Cost Capitalized Subsequent to Acquisition 800      
Carrying Amount of Land 990      
Carrying Amount of Buildings and Improvements 8,987      
Accumulated Depreciation [1] $ 278      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
Triple Net [Member] | Aboite Twp, IN, ABT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,770      
Initial Cost of Buildings & Improvements 19,930      
Cost Capitalized Subsequent to Acquisition 1,601      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 21,531      
Accumulated Depreciation [1] $ 2,918      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1984      
Triple Net [Member] | Agawam, MA, AGM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 16,112      
Cost Capitalized Subsequent to Acquisition 2,134      
Carrying Amount of Land 880      
Carrying Amount of Buildings and Improvements 18,246      
Accumulated Depreciation [1] $ 6,765      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1900      
Triple Net [Member] | Agawam, MA, AGM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,230      
Initial Cost of Buildings & Improvements 13,618      
Cost Capitalized Subsequent to Acquisition 593      
Carrying Amount of Land 1,230      
Carrying Amount of Buildings and Improvements 14,211      
Accumulated Depreciation [1] $ 1,971      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Agawam, MA, AGM4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 930      
Initial Cost of Buildings & Improvements 15,304      
Cost Capitalized Subsequent to Acquisition 292      
Carrying Amount of Land 930      
Carrying Amount of Buildings and Improvements 15,596      
Accumulated Depreciation [1] $ 2,084      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1975      
Triple Net [Member] | Agawam, MA, AGM5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 10,661      
Cost Capitalized Subsequent to Acquisition 36      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 10,697      
Accumulated Depreciation [1] $ 1,509      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1970      
Triple Net [Member] | Agawam, MA, AGM6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 10,562      
Cost Capitalized Subsequent to Acquisition 45      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 10,607      
Accumulated Depreciation [1] $ 1,496      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
Triple Net [Member] | Akron, OH, AKR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 8,219      
Cost Capitalized Subsequent to Acquisition 491      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 8,710      
Accumulated Depreciation [1] $ 2,608      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1967      
Triple Net [Member] | Akron, OH, AKR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 630      
Initial Cost of Buildings & Improvements 7,535      
Cost Capitalized Subsequent to Acquisition 229      
Carrying Amount of Land 630      
Carrying Amount of Buildings and Improvements 7,764      
Accumulated Depreciation [1] $ 2,072      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1961      
Triple Net [Member] | Albertville, AL, ALV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 1,986      
Initial Cost of Land 170      
Initial Cost of Buildings & Improvements 6,203      
Cost Capitalized Subsequent to Acquisition 280      
Carrying Amount of Land 176      
Carrying Amount of Buildings and Improvements 6,477      
Accumulated Depreciation [1] $ 1,234      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1982      
Triple Net [Member] | Alexandria, IN, ALE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 6,491      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 6,491      
Accumulated Depreciation [1] $ 215      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1915      
Triple Net [Member] | Alliance, OH, ALI, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 270      
Initial Cost of Buildings & Improvements 7,723      
Cost Capitalized Subsequent to Acquisition 107      
Carrying Amount of Land 270      
Carrying Amount of Buildings and Improvements 7,830      
Accumulated Depreciation [1] $ 2,223      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1923      
Triple Net [Member] | Ames, IA, AMS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 8,870      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 8,870      
Accumulated Depreciation [1] $ 1,357      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1974      
Triple Net [Member] | Anderson, SC, AND, Senior Housing Triple Net [Member]        
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 419      
Carrying Amount of Land 710      
Carrying Amount of Buildings and Improvements 6,709      
Accumulated Depreciation [1] $ 2,786      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
Triple Net [Member] | Andover, MA, ANV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,310      
Initial Cost of Buildings & Improvements 12,647      
Cost Capitalized Subsequent to Acquisition 27      
Carrying Amount of Land 1,310      
Carrying Amount of Buildings and Improvements 12,674      
Accumulated Depreciation [1] $ 1,843      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1982      
Triple Net [Member] | Annapolis, MD, ANN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 24,825      
Cost Capitalized Subsequent to Acquisition 151      
Carrying Amount of Land 1,010      
Carrying Amount of Buildings and Improvements 24,976      
Accumulated Depreciation [1] $ 3,221      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1986      
Triple Net [Member] | Ansted, WV, ANS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 240      
Initial Cost of Buildings & Improvements 14,113      
Cost Capitalized Subsequent to Acquisition 108      
Carrying Amount of Land 240      
Carrying Amount of Buildings and Improvements 14,221      
Accumulated Depreciation [1] $ 1,802      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1993      
Triple Net [Member] | Apple Valley, CA, APV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 10,445      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 16,639      
Cost Capitalized Subsequent to Acquisition 168      
Carrying Amount of Land 486      
Carrying Amount of Buildings and Improvements 16,801      
Accumulated Depreciation [1] $ 3,340      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Asheboro, NC, ASB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 5,032      
Cost Capitalized Subsequent to Acquisition 165      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 5,197      
Accumulated Depreciation [1] $ 1,774      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1991      
Triple Net [Member] | Asheville, NC, ASV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 204      
Initial Cost of Buildings & Improvements 3,489      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 204      
Carrying Amount of Buildings and Improvements 3,489      
Accumulated Depreciation [1] $ 1,617      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1988      
Triple Net [Member] | Asheville, NC, ASV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 280      
Initial Cost of Buildings & Improvements 1,955      
Cost Capitalized Subsequent to Acquisition 351      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 2,306      
Accumulated Depreciation [1] $ 880      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
Triple Net [Member] | Aspen Hill, MD, ASP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 9,008      
Cost Capitalized Subsequent to Acquisition 1,180      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,188      
Accumulated Depreciation [1] $ 1,384      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Atchison, KS, ATC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 140      
Initial Cost of Buildings & Improvements 5,610      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 140      
Carrying Amount of Buildings and Improvements 5,610      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1992      
Triple Net [Member] | Atlanta, GA, ATL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 7,429      
Initial Cost of Land 2,058      
Initial Cost of Buildings & Improvements 14,914      
Cost Capitalized Subsequent to Acquisition 1,143      
Carrying Amount of Land 2,080      
Carrying Amount of Buildings and Improvements 16,035      
Accumulated Depreciation [1] $ 10,896      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1999      
Triple Net [Member] | Aurora, OH, AUO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,760      
Initial Cost of Buildings & Improvements 14,148      
Cost Capitalized Subsequent to Acquisition 106      
Carrying Amount of Land 1,760      
Carrying Amount of Buildings and Improvements 14,254      
Accumulated Depreciation [1] $ 2,090      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Aurora, CO, AUR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,600      
Initial Cost of Buildings & Improvements 5,906      
Cost Capitalized Subsequent to Acquisition 7,915      
Carrying Amount of Land 2,600      
Carrying Amount of Buildings and Improvements 13,821      
Accumulated Depreciation [1] $ 4,638      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1988      
Triple Net [Member] | Aurora, CO, AUR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,440      
Initial Cost of Buildings & Improvements 28,172      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,440      
Carrying Amount of Buildings and Improvements 28,172      
Accumulated Depreciation [1] $ 7,909      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
Triple Net [Member] | Austin, TX, ATN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 18,411      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 9,520      
Cost Capitalized Subsequent to Acquisition 1,216      
Carrying Amount of Land 885      
Carrying Amount of Buildings and Improvements 10,731      
Accumulated Depreciation [1] $ 4,775      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1998      
Triple Net [Member] | Aventura, FL, AVT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,540      
Initial Cost of Buildings & Improvements 33,986      
Cost Capitalized Subsequent to Acquisition 438      
Carrying Amount of Land 4,540      
Carrying Amount of Buildings and Improvements 34,424      
Accumulated Depreciation [1] $ 3,073      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Triple Net [Member] | Avon, IN, AVN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,830      
Initial Cost of Buildings & Improvements 14,470      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,830      
Carrying Amount of Buildings and Improvements 14,470      
Accumulated Depreciation [1] $ 2,311      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2004      
Triple Net [Member] | Avon, IN, AVN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 19,444      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 19,444      
Accumulated Depreciation [1] $ 634      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | Avon Lake, OH, AON, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 790      
Initial Cost of Buildings & Improvements 10,421      
Cost Capitalized Subsequent to Acquisition 5,822      
Carrying Amount of Land 790      
Carrying Amount of Buildings and Improvements 16,243      
Accumulated Depreciation [1] $ 1,725      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
Triple Net [Member] | Ayer, MA, AYE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 22,074      
Cost Capitalized Subsequent to Acquisition 3      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 22,077      
Accumulated Depreciation [1] $ 2,862      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
Triple Net [Member] | Baldwin City, KS, BDC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 4,810      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 4,810      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2008      
Triple Net [Member] | Baltic, OH, BTC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 50      
Initial Cost of Buildings & Improvements 8,709      
Cost Capitalized Subsequent to Acquisition 189      
Carrying Amount of Land 50      
Carrying Amount of Buildings and Improvements 8,898      
Accumulated Depreciation [1] $ 2,482      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2009      
Triple Net [Member] | Baltimore, MD, BAL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 14,884      
Cost Capitalized Subsequent to Acquisition 320      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 15,204      
Accumulated Depreciation [1] $ 2,059      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1905      
Triple Net [Member] | Baltimore, MD, BAL3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 5,039      
Cost Capitalized Subsequent to Acquisition 147      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 5,186      
Accumulated Depreciation [1] $ 828      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1969      
Triple Net [Member] | Bartlesville, OK, BRT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 100      
Initial Cost of Buildings & Improvements 1,380      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 100      
Carrying Amount of Buildings and Improvements 1,380      
Accumulated Depreciation [1] $ 731      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 2012      
Triple Net [Member] | Beachwood, OH, BCH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,260      
Initial Cost of Buildings & Improvements 23,478      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,260      
Carrying Amount of Buildings and Improvements 23,478      
Accumulated Depreciation [1] $ 8,952      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1990      
Triple Net [Member] | Beattyville, KY, BTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 100      
Initial Cost of Buildings & Improvements 6,900      
Cost Capitalized Subsequent to Acquisition 660      
Carrying Amount of Land 100      
Carrying Amount of Buildings and Improvements 7,560      
Accumulated Depreciation [1] $ 2,158      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2001      
Triple Net [Member] | Bedford, NH, BED, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 28,831      
Cost Capitalized Subsequent to Acquisition 5      
Carrying Amount of Land 2,250      
Carrying Amount of Buildings and Improvements 28,836      
Accumulated Depreciation [1] $ 3,718      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Bellingham, WA, BGH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,429      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 19,861      
Cost Capitalized Subsequent to Acquisition 321      
Carrying Amount of Land 1,507      
Carrying Amount of Buildings and Improvements 20,175      
Accumulated Depreciation [1] $ 3,900      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1990      
Triple Net [Member] | Benbrook, TX, BBK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,550      
Initial Cost of Buildings & Improvements 13,553      
Cost Capitalized Subsequent to Acquisition 769      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 14,322      
Accumulated Depreciation [1] $ 1,687      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1984      
Triple Net [Member] | Bend, OR, BEN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,210      
Initial Cost of Buildings & Improvements 9,181      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,210      
Carrying Amount of Buildings and Improvements 9,181      
Accumulated Depreciation [1] $ 164      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2008      
Triple Net [Member] | Bethel Park, PA, BLP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,700      
Initial Cost of Buildings & Improvements 16,007      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,700      
Carrying Amount of Buildings and Improvements 16,007      
Accumulated Depreciation [1] $ 2,962      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1997      
Triple Net [Member] | Beverly Hills, CA, BVH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,404      
Initial Cost of Land 6,000      
Initial Cost of Buildings & Improvements 13,385      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,000      
Carrying Amount of Buildings and Improvements 13,385      
Accumulated Depreciation [1] $ 398      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Bexleyheath, UKI, BXH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,483      
Initial Cost of Buildings & Improvements 12,917      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,483      
Carrying Amount of Buildings and Improvements 12,917      
Accumulated Depreciation [1] $ 372      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2002      
Triple Net [Member] | Birmingham, UKG, BMG3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,969      
Initial Cost of Buildings & Improvements 17,754      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,969      
Carrying Amount of Buildings and Improvements 17,754      
Accumulated Depreciation [1] $ 346      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
Triple Net [Member] | Birmingham, UKG, BMG4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,902      
Initial Cost of Buildings & Improvements 22,820      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,902      
Carrying Amount of Buildings and Improvements 22,820      
Accumulated Depreciation [1] $ 438      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1997      
Triple Net [Member] | Birmingham, UKG, BMG5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,747      
Initial Cost of Buildings & Improvements 10,824      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,747      
Carrying Amount of Buildings and Improvements 10,824      
Accumulated Depreciation [1] $ 214      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1971      
Triple Net [Member] | Birmingham, UKG, BMG6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,416      
Initial Cost of Buildings & Improvements 12,054      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,416      
Carrying Amount of Buildings and Improvements 12,054      
Accumulated Depreciation [1] $ 233      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2002      
Triple Net [Member] | Bloomington, IN, BLN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 670      
Initial Cost of Buildings & Improvements 17,423      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 17,423      
Accumulated Depreciation [1] $ 165      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2000      
Triple Net [Member] | Bluefield, VA, BLU, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 12,463      
Cost Capitalized Subsequent to Acquisition 32      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 12,495      
Accumulated Depreciation [1] $ 1,658      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Triple Net [Member] | Boardman, OH, BDM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 12,800      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 12,800      
Accumulated Depreciation [1] $ 3,016      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1999      
Triple Net [Member] | Boca Raton, FL, BOR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 31,048      
Cost Capitalized Subsequent to Acquisition 893      
Carrying Amount of Land 1,440      
Carrying Amount of Buildings and Improvements 31,941      
Accumulated Depreciation [1] $ 2,802      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1968      
Triple Net [Member] | Boonville, IN, WOD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 5,510      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 5,510      
Accumulated Depreciation [1] $ 2,078      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1987      
Triple Net [Member] | Bowling Green, KY, BLG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,800      
Initial Cost of Buildings & Improvements 26,700      
Cost Capitalized Subsequent to Acquisition 149      
Carrying Amount of Land 3,800      
Carrying Amount of Buildings and Improvements 26,849      
Accumulated Depreciation [1] $ 5,080      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2009      
Triple Net [Member] | Bradenton, FL, BRD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 252      
Initial Cost of Buildings & Improvements 3,298      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 252      
Carrying Amount of Buildings and Improvements 3,298      
Accumulated Depreciation [1] $ 1,761      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1986      
Triple Net [Member] | Bradenton, FL, BRD7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 9,953      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 9,953      
Accumulated Depreciation [1] $ 923      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1995      
Triple Net [Member] | Braintree, MA, BRA1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 170      
Initial Cost of Buildings & Improvements 7,157      
Cost Capitalized Subsequent to Acquisition 1,290      
Carrying Amount of Land 170      
Carrying Amount of Buildings and Improvements 8,447      
Accumulated Depreciation [1] $ 8,236      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 2002      
Triple Net [Member] | Braintree, UKH, BTE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 15,893      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 15,893      
Accumulated Depreciation [1] $ 560      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
Triple Net [Member] | Brandon, MS, BDN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,220      
Initial Cost of Buildings & Improvements 10,241      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,220      
Carrying Amount of Buildings and Improvements 10,241      
Accumulated Depreciation [1] $ 1,450      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
Triple Net [Member] | Brecksville, OH, BEC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 990      
Initial Cost of Buildings & Improvements 19,353      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 990      
Carrying Amount of Buildings and Improvements 19,353      
Accumulated Depreciation [1] $ 623      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1978      
Triple Net [Member] | Bremerton, WA, BTN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 390      
Initial Cost of Buildings & Improvements 2,210      
Cost Capitalized Subsequent to Acquisition 144      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 2,354      
Accumulated Depreciation [1] $ 548      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2009      
Triple Net [Member] | Bremerton, WA, BTN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 830      
Initial Cost of Buildings & Improvements 10,420      
Cost Capitalized Subsequent to Acquisition 950      
Carrying Amount of Land 830      
Carrying Amount of Buildings and Improvements 11,370      
Accumulated Depreciation [1] $ 1,637      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1972      
Triple Net [Member] | Bremerton, WA, BTN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 2,899      
Cost Capitalized Subsequent to Acquisition 13      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 2,912      
Accumulated Depreciation [1] $ 140      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1965      
Triple Net [Member] | Brick, NJ, BRK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,290      
Initial Cost of Buildings & Improvements 25,247      
Cost Capitalized Subsequent to Acquisition 529      
Carrying Amount of Land 1,290      
Carrying Amount of Buildings and Improvements 25,776      
Accumulated Depreciation [1] $ 2,957      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Brick, NJ, BRK2, Senior Housing Triple Net [Member]        
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 1,285      
Carrying Amount of Land 1,183      
Carrying Amount of Buildings and Improvements 18,645      
Accumulated Depreciation [1] $ 2,474      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
Triple Net [Member] | Brick, NJ, BRK3, Senior Housing Triple Net [Member]        
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 5,312      
Carrying Amount of Land 692      
Carrying Amount of Buildings and Improvements 22,436      
Accumulated Depreciation [1] $ 2,328      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1973      
Triple Net [Member] | Brick, NJ, BRK4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,160      
Initial Cost of Buildings & Improvements 8,496      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,160      
Carrying Amount of Buildings and Improvements 8,496      
Accumulated Depreciation [1] $ 25      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1988      
Triple Net [Member] | Bridgewater, NJ, BWT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,850      
Initial Cost of Buildings & Improvements 3,050      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,850      
Carrying Amount of Buildings and Improvements 3,050      
Accumulated Depreciation [1] $ 1,367      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1996      
Triple Net [Member] | Bridgewater, NJ, BWT2, Senior Housing Triple Net [Member]        
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 1,123      
Carrying Amount of Land 1,749      
Carrying Amount of Buildings and Improvements 49,304      
Accumulated Depreciation [1] $ 6,343      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1982      
Triple Net [Member] | Bridgewater, NJ, BWT3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 31,810      
Cost Capitalized Subsequent to Acquisition 471      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 32,281      
Accumulated Depreciation [1] $ 3,668      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1990      
Triple Net [Member] | Broadview Heights, OH, BRV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 12,400      
Cost Capitalized Subsequent to Acquisition 2,393      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 14,793      
Accumulated Depreciation [1] $ 5,059      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2005      
Triple Net [Member] | Brookfield, WI, BKF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 12,830      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 12,830      
Accumulated Depreciation [1] $ 746      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1883      
Triple Net [Member] | Brooklyn Park, MD, BRP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,290      
Initial Cost of Buildings & Improvements 16,329      
Cost Capitalized Subsequent to Acquisition 29      
Carrying Amount of Land 1,290      
Carrying Amount of Buildings and Improvements 16,358      
Accumulated Depreciation [1] $ 2,193      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1995      
Triple Net [Member] | Brooks, AB, BKS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 1,996      
Initial Cost of Land 376      
Initial Cost of Buildings & Improvements 4,951      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 376      
Carrying Amount of Buildings and Improvements 4,951      
Accumulated Depreciation [1] $ 157      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1992      
Triple Net [Member] | Brookville, IN, BKV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 13,461      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 13,461      
Accumulated Depreciation [1] $ 419      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Buckhurst Hill, UKH, BKH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 13,861      
Initial Cost of Buildings & Improvements 58,858      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 13,861      
Carrying Amount of Buildings and Improvements 58,858      
Accumulated Depreciation [1] $ 1,234      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1900      
Triple Net [Member] | Burleson, TX, BRS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 670      
Initial Cost of Buildings & Improvements 13,985      
Cost Capitalized Subsequent to Acquisition 250      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 14,235      
Accumulated Depreciation [1] $ 1,774      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1984      
Triple Net [Member] | Burleson, TX, BRS3, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 3,150      
Carrying Amount of Buildings and Improvements 10,437      
Accumulated Depreciation [1] $ 437      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1989      
Triple Net [Member] | Burlington, NC, BLT1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 280      
Initial Cost of Buildings & Improvements 4,297      
Cost Capitalized Subsequent to Acquisition 707      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 5,004      
Accumulated Depreciation [1] $ 1,678      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2012      
Triple Net [Member] | Burlington, NC, BLT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 460      
Initial Cost of Buildings & Improvements 5,467      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 460      
Carrying Amount of Buildings and Improvements 5,467      
Accumulated Depreciation [1] $ 1,883      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1990      
Triple Net [Member] | Burlington, NC, BLT3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 810      
Initial Cost of Buildings & Improvements 11,257      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 810      
Carrying Amount of Buildings and Improvements 11,257      
Accumulated Depreciation [1] $ 364      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
Triple Net [Member] | Burlington, NJ, BUI, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,700      
Initial Cost of Buildings & Improvements 12,554      
Cost Capitalized Subsequent to Acquisition 466      
Carrying Amount of Land 1,700      
Carrying Amount of Buildings and Improvements 13,020      
Accumulated Depreciation [1] $ 1,970      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Burlington, NJ, BUI2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,170      
Initial Cost of Buildings & Improvements 19,205      
Cost Capitalized Subsequent to Acquisition 167      
Carrying Amount of Land 1,170      
Carrying Amount of Buildings and Improvements 19,372      
Accumulated Depreciation [1] $ 2,464      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Burlington, WA, BUL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,860      
Initial Cost of Buildings & Improvements 31,722      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,860      
Carrying Amount of Buildings and Improvements 31,722      
Accumulated Depreciation [1] $ 691      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2000      
Triple Net [Member] | Burnaby, BC, BBY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,119      
Initial Cost of Land 7,623      
Initial Cost of Buildings & Improvements 13,844      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 7,623      
Carrying Amount of Buildings and Improvements 13,844      
Accumulated Depreciation [1] $ 445      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2006      
Triple Net [Member] | Byrdstown, TN, BYD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 2,414      
Cost Capitalized Subsequent to Acquisition 1,534      
Carrying Amount of Land 1,265      
Carrying Amount of Buildings and Improvements 2,683      
Accumulated Depreciation [1] $ 1,917      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2003      
Triple Net [Member] | Calgary, AB, CAL6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 16,917      
Initial Cost of Land 2,341      
Initial Cost of Buildings & Improvements 42,768      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,341      
Carrying Amount of Buildings and Improvements 42,768      
Accumulated Depreciation [1] $ 1,306      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1993      
Triple Net [Member] | Calgary, AB, CAL7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 28,055      
Initial Cost of Land 4,569      
Initial Cost of Buildings & Improvements 70,199      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,569      
Carrying Amount of Buildings and Improvements 70,199      
Accumulated Depreciation [1] $ 2,123      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2001      
Triple Net [Member] | Cambridge, MD, CAB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 490      
Initial Cost of Buildings & Improvements 15,843      
Cost Capitalized Subsequent to Acquisition 207      
Carrying Amount of Land 490      
Carrying Amount of Buildings and Improvements 16,050      
Accumulated Depreciation [1] $ 2,091      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Camrose, AB, CMR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,824      
Initial Cost of Land 1,019      
Initial Cost of Buildings & Improvements 20,678      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,019      
Carrying Amount of Buildings and Improvements 20,678      
Accumulated Depreciation [1] $ 596      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1972      
Triple Net [Member] | Canton, MA, CAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 820      
Initial Cost of Buildings & Improvements 8,201      
Cost Capitalized Subsequent to Acquisition 263      
Carrying Amount of Land 820      
Carrying Amount of Buildings and Improvements 8,464      
Accumulated Depreciation [1] $ 5,133      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2009      
Triple Net [Member] | Canton, NC, CAT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 130      
Initial Cost of Buildings & Improvements 5,357      
Cost Capitalized Subsequent to Acquisition 700      
Carrying Amount of Land 130      
Carrying Amount of Buildings and Improvements 6,057      
Accumulated Depreciation [1] $ 156      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1957      
Triple Net [Member] | Canton, OH, CTN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 2,098      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 2,098      
Accumulated Depreciation [1] $ 967      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1973      
Triple Net [Member] | Cape Coral, FL, CPC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 3,281      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 3,281      
Accumulated Depreciation [1] $ 1,240      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2015      
Triple Net [Member] | Cape Coral, FL, CPC2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,894      
Initial Cost of Land 760      
Initial Cost of Buildings & Improvements 18,868      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 760      
Carrying Amount of Buildings and Improvements 18,868      
Accumulated Depreciation [1] $ 1,768      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1990      
Triple Net [Member] | Cape May Court House, NJ, CCH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 17,002      
Cost Capitalized Subsequent to Acquisition 1,155      
Carrying Amount of Land 1,440      
Carrying Amount of Buildings and Improvements 18,157      
Accumulated Depreciation [1] $ 735      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1991      
Triple Net [Member] | Carmel, IN, CML4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,700      
Initial Cost of Buildings & Improvements 19,491      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,700      
Carrying Amount of Buildings and Improvements 19,491      
Accumulated Depreciation [1] $ 322      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | Carrollton, TX, CRL3, Senior Housing Triple Net [Member]        
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 734      
Carrying Amount of Land 4,280      
Carrying Amount of Buildings and Improvements 32,178      
Accumulated Depreciation [1] $ 1,668      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1996      
Triple Net [Member] | Carson City, NV, CSC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 520      
Initial Cost of Buildings & Improvements 8,238      
Cost Capitalized Subsequent to Acquisition 250      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 8,488      
Accumulated Depreciation [1] $ 491      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2008      
Triple Net [Member] | Cary, NC, CRY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 4,350      
Cost Capitalized Subsequent to Acquisition 986      
Carrying Amount of Land 1,500      
Carrying Amount of Buildings and Improvements 5,336      
Accumulated Depreciation [1] $ 2,312      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 2002      
Triple Net [Member] | Castleton, IN, CTT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 15,137      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 15,137      
Accumulated Depreciation [1] $ 512      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
Triple Net [Member] | Catonsville, MD, CTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,330      
Initial Cost of Buildings & Improvements 15,003      
Cost Capitalized Subsequent to Acquisition 549      
Carrying Amount of Land 1,330      
Carrying Amount of Buildings and Improvements 15,552      
Accumulated Depreciation [1] $ 2,088      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Triple Net [Member] | Cedar Grove, NJ, CRG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,830      
Initial Cost of Buildings & Improvements 10,939      
Cost Capitalized Subsequent to Acquisition 10      
Carrying Amount of Land 1,830      
Carrying Amount of Buildings and Improvements 10,949      
Accumulated Depreciation [1] $ 1,538      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Cedar Grove, NJ, CRG2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,850      
Initial Cost of Buildings & Improvements 27,737      
Cost Capitalized Subsequent to Acquisition 20      
Carrying Amount of Land 2,850      
Carrying Amount of Buildings and Improvements 27,757      
Accumulated Depreciation [1] $ 3,667      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Centreville, MD, CEV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 600      
Initial Cost of Buildings & Improvements [2] 14,602      
Cost Capitalized Subsequent to Acquisition [2] 241      
Carrying Amount of Land [2] 600      
Carrying Amount of Buildings and Improvements [2] 14,843      
Accumulated Depreciation [1],[2] $ 1,982      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 2001      
Triple Net [Member] | Chapel Hill, NC, CHP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 354      
Initial Cost of Buildings & Improvements 2,646      
Cost Capitalized Subsequent to Acquisition 783      
Carrying Amount of Land 354      
Carrying Amount of Buildings and Improvements 3,429      
Accumulated Depreciation [1] $ 1,268      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1979      
Triple Net [Member] | Chapel Hill, NC, CHP2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 470      
Initial Cost of Buildings & Improvements 7,512      
Cost Capitalized Subsequent to Acquisition 906      
Carrying Amount of Land 470      
Carrying Amount of Buildings and Improvements 8,418      
Accumulated Depreciation [1] $ 270      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1965      
Triple Net [Member] | Charles Town, WV, CLT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 230      
Initial Cost of Buildings & Improvements 22,834      
Cost Capitalized Subsequent to Acquisition 29      
Carrying Amount of Land 230      
Carrying Amount of Buildings and Improvements 22,863      
Accumulated Depreciation [1] $ 2,867      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2015      
Triple Net [Member] | Charleston, WV, CHT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 440      
Initial Cost of Buildings & Improvements 17,575      
Cost Capitalized Subsequent to Acquisition 298      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 17,873      
Accumulated Depreciation [1] $ 2,249      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
Triple Net [Member] | Charleston, WV, CHT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 5,430      
Cost Capitalized Subsequent to Acquisition 14      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 5,444      
Accumulated Depreciation [1] $ 778      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Chatham, VA, CHH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 320      
Initial Cost of Buildings & Improvements 14,039      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 320      
Carrying Amount of Buildings and Improvements 14,039      
Accumulated Depreciation [1] $ 494      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
Triple Net [Member] | Chelmsford, MA, CHM, Senior Housing Triple Net [Member]        
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 1,499      
Carrying Amount of Land 1,040      
Carrying Amount of Buildings and Improvements 12,450      
Accumulated Depreciation [1] $ 3,712      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2005      
Triple Net [Member] | Chester, VA, CTF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,320      
Initial Cost of Buildings & Improvements 18,127      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,320      
Carrying Amount of Buildings and Improvements 18,127      
Accumulated Depreciation [1] $ 618      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
Triple Net [Member] | Chicago, IL, CHI2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 19,256      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 19,256      
Accumulated Depreciation [1] $ 1,916      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Triple Net [Member] | Chicago, IL, CHI3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,900      
Initial Cost of Buildings & Improvements 17,016      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,900      
Carrying Amount of Buildings and Improvements 17,016      
Accumulated Depreciation [1] $ 1,717      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1997      
Triple Net [Member] | Chickasha, OK, CHC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 85      
Initial Cost of Buildings & Improvements 1,395      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 85      
Carrying Amount of Buildings and Improvements 1,395      
Accumulated Depreciation [1] $ 733      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 2005      
Triple Net [Member] | Cinnaminson, NJ, CIN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 860      
Initial Cost of Buildings & Improvements 6,663      
Cost Capitalized Subsequent to Acquisition 149      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 6,812      
Accumulated Depreciation [1] $ 1,026      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Citrus Heights, CA, CTH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 14,506      
Initial Cost of Land 2,300      
Initial Cost of Buildings & Improvements 31,876      
Cost Capitalized Subsequent to Acquisition 589      
Carrying Amount of Land 2,300      
Carrying Amount of Buildings and Improvements 32,465      
Accumulated Depreciation [1] $ 6,427      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | Claremore, OK, CLM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 155      
Initial Cost of Buildings & Improvements 1,427      
Cost Capitalized Subsequent to Acquisition 6,130      
Carrying Amount of Land 155      
Carrying Amount of Buildings and Improvements 7,557      
Accumulated Depreciation [1] $ 1,037      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1972      
Triple Net [Member] | Clarks Summit, PA, CKS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 11,179      
Cost Capitalized Subsequent to Acquisition 15      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 11,194      
Accumulated Depreciation [1] $ 1,563      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Clarks Summit, PA, CKS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 6,529      
Cost Capitalized Subsequent to Acquisition 54      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 6,583      
Accumulated Depreciation [1] $ 936      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1974      
Triple Net [Member] | Clarksville, TN, CLK2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 2,292      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 2,292      
Accumulated Depreciation [1] $ 1,050      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 2002      
Triple Net [Member] | Clayton, NC, CLY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 520      
Initial Cost of Buildings & Improvements 15,733      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 15,733      
Accumulated Depreciation [1] $ 480      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2011      
Triple Net [Member] | Cleburne, TX, CBN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 520      
Initial Cost of Buildings & Improvements 5,369      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 5,369      
Accumulated Depreciation [1] $ 1,234      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1997      
Triple Net [Member] | Clevedon, UKK, CLD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,392      
Initial Cost of Buildings & Improvements 20,233      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,392      
Carrying Amount of Buildings and Improvements 20,233      
Accumulated Depreciation [1] $ 712      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1988      
Triple Net [Member] | Cleveland, TN, CLE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 350      
Initial Cost of Buildings & Improvements 5,000      
Cost Capitalized Subsequent to Acquisition 122      
Carrying Amount of Land 350      
Carrying Amount of Buildings and Improvements 5,122      
Accumulated Depreciation [1] $ 2,068      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1998      
Triple Net [Member] | Clinton, MD, CLI, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,330      
Initial Cost of Buildings & Improvements 20,876      
Cost Capitalized Subsequent to Acquisition 591      
Carrying Amount of Land 2,330      
Carrying Amount of Buildings and Improvements 21,467      
Accumulated Depreciation [1] $ 2,170      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2006      
Triple Net [Member] | Cloquet, MN, CLQ, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 340      
Initial Cost of Buildings & Improvements 4,660      
Cost Capitalized Subsequent to Acquisition 120      
Carrying Amount of Land 340      
Carrying Amount of Buildings and Improvements 4,780      
Accumulated Depreciation [1] $ 566      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Cobham, UKJ, COB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 11,723      
Initial Cost of Buildings & Improvements 29,871      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 11,723      
Carrying Amount of Buildings and Improvements 29,871      
Accumulated Depreciation [1] $ 1,888      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1983      
Triple Net [Member] | Colchester, CT, CLH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 980      
Initial Cost of Buildings & Improvements 4,860      
Cost Capitalized Subsequent to Acquisition 495      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 5,355      
Accumulated Depreciation [1] $ 874      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Colorado Springs, CO, CSP3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,280      
Initial Cost of Buildings & Improvements 62,168      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,280      
Carrying Amount of Buildings and Improvements 62,168      
Accumulated Depreciation [1] $ 534      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1997      
Triple Net [Member] | Colts Neck, NJ, CSN, Senior Housing Triple Net [Member]        
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 1,147      
Carrying Amount of Land 1,016      
Carrying Amount of Buildings and Improvements 15,644      
Accumulated Depreciation [1] $ 2,127      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1965      
Triple Net [Member] | Columbia, TN, CLB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 341      
Initial Cost of Buildings & Improvements 2,295      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 341      
Carrying Amount of Buildings and Improvements 2,295      
Accumulated Depreciation [1] $ 1,058      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1987      
Triple Net [Member] | Columbia, TN, CLB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 3,787      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 3,787      
Accumulated Depreciation [1] $ 1,719      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1986      
Triple Net [Member] | Columbia, SC, CMB1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,120      
Initial Cost of Buildings & Improvements 4,860      
Cost Capitalized Subsequent to Acquisition 5,709      
Carrying Amount of Land 2,120      
Carrying Amount of Buildings and Improvements 10,569      
Accumulated Depreciation [1] $ 3,826      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2001      
Triple Net [Member] | Columbia Heights, MN, CBH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 825      
Initial Cost of Buildings & Improvements 14,175      
Cost Capitalized Subsequent to Acquisition 163      
Carrying Amount of Land 825      
Carrying Amount of Buildings and Improvements 14,338      
Accumulated Depreciation [1] $ 1,601      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Columbus, IN, CBS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 610      
Initial Cost of Buildings & Improvements 3,190      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 610      
Carrying Amount of Buildings and Improvements 3,190      
Accumulated Depreciation [1] $ 500      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1990      
Triple Net [Member] | Columbus, OH, COL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 5,170      
Cost Capitalized Subsequent to Acquisition 8,255      
Carrying Amount of Land 1,070      
Carrying Amount of Buildings and Improvements 12,885      
Accumulated Depreciation [1] $ 3,637      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1967      
Triple Net [Member] | Columbus, OH, COL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 5,022      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,010      
Carrying Amount of Buildings and Improvements 5,022      
Accumulated Depreciation [1] $ 1,565      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2000      
Triple Net [Member] | Columbus, OH, COL3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 4,931      
Cost Capitalized Subsequent to Acquisition 13,620      
Carrying Amount of Land 1,860      
Carrying Amount of Buildings and Improvements 17,701      
Accumulated Depreciation [1] $ 4,946      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2009      
Triple Net [Member] | Columbus, IN, SLO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 6,710      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 6,710      
Accumulated Depreciation [1] $ 2,377      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2013      
Triple Net [Member] | Concord, NC, CCD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 550      
Initial Cost of Buildings & Improvements 3,921      
Cost Capitalized Subsequent to Acquisition 55      
Carrying Amount of Land 550      
Carrying Amount of Buildings and Improvements 3,976      
Accumulated Depreciation [1] $ 1,516      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1989      
Triple Net [Member] | Concord, NH, CNC2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 780      
Initial Cost of Buildings & Improvements 18,423      
Cost Capitalized Subsequent to Acquisition 446      
Carrying Amount of Land 780      
Carrying Amount of Buildings and Improvements 18,869      
Accumulated Depreciation [1] $ 2,378      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2010      
Triple Net [Member] | Concord, NH, CNC3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,760      
Initial Cost of Buildings & Improvements 43,179      
Cost Capitalized Subsequent to Acquisition 568      
Carrying Amount of Land 1,760      
Carrying Amount of Buildings and Improvements 43,747      
Accumulated Depreciation [1] $ 5,518      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Triple Net [Member] | Concord, NH, CNC4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 3,041      
Cost Capitalized Subsequent to Acquisition 340      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 3,381      
Accumulated Depreciation [1] $ 529      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Congleton, UKD, CGL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,433      
Initial Cost of Buildings & Improvements 6,120      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,433      
Carrying Amount of Buildings and Improvements 6,120      
Accumulated Depreciation [1] $ 176      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
Triple Net [Member] | Conroe, TX, CNE2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 980      
Initial Cost of Buildings & Improvements 7,771      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 7,771      
Accumulated Depreciation [1] $ 1,278      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 1968      
Triple Net [Member] | Conyers, GA, CYR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,740      
Initial Cost of Buildings & Improvements 19,302      
Cost Capitalized Subsequent to Acquisition 227      
Carrying Amount of Land 2,740      
Carrying Amount of Buildings and Improvements 19,529      
Accumulated Depreciation [1] $ 1,725      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2000      
Triple Net [Member] | Coppell, TX, CPP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,550      
Initial Cost of Buildings & Improvements 8,386      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 8,386      
Accumulated Depreciation [1] $ 253      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1964      
Triple Net [Member] | Cortland, NY, CRT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 18,041      
Cost Capitalized Subsequent to Acquisition 58      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 18,099      
Accumulated Depreciation [1] $ 1,518      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1997      
Triple Net [Member] | Coventry, UKG, CVE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,345      
Initial Cost of Buildings & Improvements 16,530      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,345      
Carrying Amount of Buildings and Improvements 16,530      
Accumulated Depreciation [1] $ 332      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1998      
Triple Net [Member] | Crawfordsville, IN, CWF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 17,239      
Cost Capitalized Subsequent to Acquisition 1,426      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 18,665      
Accumulated Depreciation [1] $ 599      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
Triple Net [Member] | Crown Point, IN, CPT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 20,044      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 20,044      
Accumulated Depreciation [1] $ 285      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1970      
Triple Net [Member] | Dallas, OR, DLS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 9,427      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 9,427      
Accumulated Depreciation [1] $ 160      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1986      
Triple Net [Member] | Daniels, WV, DNL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 17,320      
Cost Capitalized Subsequent to Acquisition 50      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 17,370      
Accumulated Depreciation [1] $ 2,194      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Danville, VA, DNV1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 3,954      
Cost Capitalized Subsequent to Acquisition 722      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 4,676      
Accumulated Depreciation [1] $ 1,634      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1984      
Triple Net [Member] | Danville, VA, DNV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 240      
Initial Cost of Buildings & Improvements 8,436      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 240      
Carrying Amount of Buildings and Improvements 8,436      
Accumulated Depreciation [1] $ 293      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2001      
Triple Net [Member] | Daphne, AL, DPH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,880      
Initial Cost of Buildings & Improvements 8,670      
Cost Capitalized Subsequent to Acquisition 127      
Carrying Amount of Land 2,880      
Carrying Amount of Buildings and Improvements 8,797      
Accumulated Depreciation [1] $ 876      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2006      
Triple Net [Member] | Dedham, MA, DED, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,360      
Initial Cost of Buildings & Improvements 9,830      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,360      
Carrying Amount of Buildings and Improvements 9,830      
Accumulated Depreciation [1] $ 3,964      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1972      
Triple Net [Member] | Defuniak Springs, FL, DSP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 10,250      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 10,250      
Accumulated Depreciation [1] $ 2,751      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
Triple Net [Member] | Denton, TX, DEN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,760      
Initial Cost of Buildings & Improvements 8,305      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,760      
Carrying Amount of Buildings and Improvements 8,305      
Accumulated Depreciation [1] $ 1,025      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1986      
Triple Net [Member] | Derby, UKF, DRY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 12,600      
Carrying Amount of Land 2,728      
Carrying Amount of Buildings and Improvements 9,872      
Accumulated Depreciation [1] $ 82      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
Triple Net [Member] | Dover, DE, DOV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 7,717      
Cost Capitalized Subsequent to Acquisition 38      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 7,755      
Accumulated Depreciation [1] $ 1,075      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Dover, DE, DOV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 22,266      
Cost Capitalized Subsequent to Acquisition 90      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 22,356      
Accumulated Depreciation [1] $ 2,886      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Drayton Valley, AB, DYV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 614      
Initial Cost of Buildings & Improvements 10,198      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 614      
Carrying Amount of Buildings and Improvements 10,198      
Accumulated Depreciation [1] $ 292      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Dresher, PA, DRS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 40,236      
Cost Capitalized Subsequent to Acquisition 917      
Carrying Amount of Land 2,083      
Carrying Amount of Buildings and Improvements 41,130      
Accumulated Depreciation [1] $ 5,259      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1980      
Triple Net [Member] | Dundalk, MD, DND, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 1,770      
Initial Cost of Buildings & Improvements [2] 32,047      
Cost Capitalized Subsequent to Acquisition [2] 784      
Carrying Amount of Land [2] 1,770      
Carrying Amount of Buildings and Improvements [2] 32,831      
Accumulated Depreciation [1],[2] $ 4,198      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 1996      
Triple Net [Member] | Durham, NC, DRH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,476      
Initial Cost of Buildings & Improvements 10,659      
Cost Capitalized Subsequent to Acquisition 2,196      
Carrying Amount of Land 1,476      
Carrying Amount of Buildings and Improvements 12,855      
Accumulated Depreciation [1] $ 10,052      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 2015      
Triple Net [Member] | Dyer, IN, DYR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 25,061      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 25,061      
Accumulated Depreciation [1] $ 178      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2008      
Triple Net [Member] | Eagan, MN, EAG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 17,000      
Initial Cost of Land 2,260      
Initial Cost of Buildings & Improvements 31,643      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,260      
Carrying Amount of Buildings and Improvements 31,643      
Accumulated Depreciation [1] $ 137      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1980      
Triple Net [Member] | East Brunswick, NJ, ETB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,380      
Initial Cost of Buildings & Improvements 34,229      
Cost Capitalized Subsequent to Acquisition 619      
Carrying Amount of Land 1,380      
Carrying Amount of Buildings and Improvements 34,848      
Accumulated Depreciation [1] $ 3,925      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2003      
Triple Net [Member] | East Norriton, PA, ENT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 28,129      
Cost Capitalized Subsequent to Acquisition 1,084      
Carrying Amount of Land 1,262      
Carrying Amount of Buildings and Improvements 29,151      
Accumulated Depreciation [1] $ 3,776      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2002      
Triple Net [Member] | Eastbourne, UKJ, EBN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,866      
Initial Cost of Buildings & Improvements 29,210      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,866      
Carrying Amount of Buildings and Improvements 29,210      
Accumulated Depreciation [1] $ 1,013      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2015      
Triple Net [Member] | Easton, MD, ESN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 24,539      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 24,539      
Accumulated Depreciation [1] $ 3,266      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Eatontown, NJ, ETT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,190      
Initial Cost of Buildings & Improvements 23,358      
Cost Capitalized Subsequent to Acquisition 68      
Carrying Amount of Land 1,190      
Carrying Amount of Buildings and Improvements 23,426      
Accumulated Depreciation [1] $ 3,088      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1982      
Triple Net [Member] | Eden, NC, EDN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 390      
Initial Cost of Buildings & Improvements 4,877      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 4,877      
Accumulated Depreciation [1] $ 1,701      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1968      
Triple Net [Member] | Edmond, OK, EDM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 8,388      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 8,388      
Accumulated Depreciation [1] $ 877      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Triple Net [Member] | Edmond, OK, EDM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,810      
Initial Cost of Buildings & Improvements 14,849      
Cost Capitalized Subsequent to Acquisition 112      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 14,961      
Accumulated Depreciation [1] $ 618      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1996      
Triple Net [Member] | El Paso, TX, ELP8, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,420      
Initial Cost of Buildings & Improvements 12,394      
Cost Capitalized Subsequent to Acquisition 284      
Carrying Amount of Land 1,420      
Carrying Amount of Buildings and Improvements 12,678      
Accumulated Depreciation [1] $ 529      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1988      
Triple Net [Member] | Elizabeth City, NC, ELZ, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 2,760      
Cost Capitalized Subsequent to Acquisition 2,011      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 4,771      
Accumulated Depreciation [1] $ 1,928      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1997      
Triple Net [Member] | Elizabethton, TN, EBT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 4,604      
Cost Capitalized Subsequent to Acquisition 336      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 4,940      
Accumulated Depreciation [1] $ 2,012      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1976      
Triple Net [Member] | Emeryville, CA, EMY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,560      
Initial Cost of Buildings & Improvements 57,491      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,560      
Carrying Amount of Buildings and Improvements 57,491      
Accumulated Depreciation [1] $ 2,206      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1981      
Triple Net [Member] | Englewood, NJ, EGW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 930      
Initial Cost of Buildings & Improvements 4,514      
Cost Capitalized Subsequent to Acquisition 17      
Carrying Amount of Land 930      
Carrying Amount of Buildings and Improvements 4,531      
Accumulated Depreciation [1] $ 658      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Englishtown, NJ, ENG, Senior Housing Triple Net [Member]        
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 987      
Carrying Amount of Land 765      
Carrying Amount of Buildings and Improvements 13,431      
Accumulated Depreciation [1] $ 1,849      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2006      
Triple Net [Member] | Erin, TN, ERN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 440      
Initial Cost of Buildings & Improvements 8,060      
Cost Capitalized Subsequent to Acquisition 134      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 8,194      
Accumulated Depreciation [1] $ 3,196      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1962      
Triple Net [Member] | Eugene, OR, EGN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 5,822      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 5,822      
Accumulated Depreciation [1] $ 102      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1999      
Triple Net [Member] | Eureka, KS, EKA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 50      
Initial Cost of Buildings & Improvements 3,950      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 50      
Carrying Amount of Buildings and Improvements 3,950      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
Triple Net [Member] | Everett, WA, EVR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,400      
Initial Cost of Buildings & Improvements 5,476      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,400      
Carrying Amount of Buildings and Improvements 5,476      
Accumulated Depreciation [1] $ 2,428      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1998      
Triple Net [Member] | Fair Lawn, NJ, FRL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,420      
Initial Cost of Buildings & Improvements 24,504      
Cost Capitalized Subsequent to Acquisition 444      
Carrying Amount of Land 2,420      
Carrying Amount of Buildings and Improvements 24,948      
Accumulated Depreciation [1] $ 3,253      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1991      
Triple Net [Member] | Fairfield, CA, FAR, Senior Housing Triple Net [Member]        
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 1,541      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 15,581      
Accumulated Depreciation [1] $ 5,530      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1991      
Triple Net [Member] | Fairhope, AL, FHP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 570      
Initial Cost of Buildings & Improvements 9,119      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 570      
Carrying Amount of Buildings and Improvements 9,119      
Accumulated Depreciation [1] $ 904      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1973      
Triple Net [Member] | Fall River, MA, FLL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 620      
Initial Cost of Buildings & Improvements 5,829      
Cost Capitalized Subsequent to Acquisition 4,856      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 10,685      
Accumulated Depreciation [1] $ 4,708      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1908      
Triple Net [Member] | Fall River, MA, FLL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 34,715      
Cost Capitalized Subsequent to Acquisition 208      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 34,923      
Accumulated Depreciation [1] $ 4,498      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Fanwood, NJ, FAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,850      
Initial Cost of Buildings & Improvements 55,175      
Cost Capitalized Subsequent to Acquisition 818      
Carrying Amount of Land 2,850      
Carrying Amount of Buildings and Improvements 55,993      
Accumulated Depreciation [1] $ 6,238      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2015      
Triple Net [Member] | Faribault, MN, FAB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 780      
Initial Cost of Buildings & Improvements 11,539      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 780      
Carrying Amount of Buildings and Improvements 11,539      
Accumulated Depreciation [1] $ 50      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1980      
Triple Net [Member] | Farnborough, UKJ, FBG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,433      
Initial Cost of Buildings & Improvements 6,857      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,433      
Carrying Amount of Buildings and Improvements 6,857      
Accumulated Depreciation [1] $ 192      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1987      
Triple Net [Member] | Fayetteville, PA, FTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,150      
Initial Cost of Buildings & Improvements 32,951      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,150      
Carrying Amount of Buildings and Improvements 32,951      
Accumulated Depreciation [1] $ 362      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
Triple Net [Member] | Fayetteville, GA, FYV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 12,665      
Cost Capitalized Subsequent to Acquisition 309      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 12,974      
Accumulated Depreciation [1] $ 1,116      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1983      
Triple Net [Member] | Fayetteville, NY, MAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 3,962      
Cost Capitalized Subsequent to Acquisition 500      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 4,462      
Accumulated Depreciation [1] $ 1,652      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2011      
Triple Net [Member] | Findlay, OH, FND, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 1,800      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 1,800      
Accumulated Depreciation [1] $ 891      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1999      
Triple Net [Member] | Fishers, IN, FIS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 14,500      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,500      
Carrying Amount of Buildings and Improvements 14,500      
Accumulated Depreciation [1] $ 2,315      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1993      
Triple Net [Member] | Florence, NJ, FLO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 2,978      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 2,978      
Accumulated Depreciation [1] $ 1,120      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1997      
Triple Net [Member] | Florence, AL, FLR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 6,985      
Initial Cost of Land 353      
Initial Cost of Buildings & Improvements 13,049      
Cost Capitalized Subsequent to Acquisition 200      
Carrying Amount of Land 385      
Carrying Amount of Buildings and Improvements 13,217      
Accumulated Depreciation [1] $ 2,542      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | Flourtown, PA, FLW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 14,830      
Cost Capitalized Subsequent to Acquisition 203      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 15,033      
Accumulated Depreciation [1] $ 2,011      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Flower Mound, TX, FMD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 8,414      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 8,414      
Accumulated Depreciation [1] $ 254      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Follansbee, WV, FLB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 640      
Initial Cost of Buildings & Improvements 27,670      
Cost Capitalized Subsequent to Acquisition 49      
Carrying Amount of Land 640      
Carrying Amount of Buildings and Improvements 27,719      
Accumulated Depreciation [1] $ 3,541      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
Triple Net [Member] | Folsom, CA, FOL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 33,600      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,582      
Carrying Amount of Buildings and Improvements 32,018      
Accumulated Depreciation [1] $ 2,129      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2010      
Triple Net [Member] | Forest City, NC, FRC2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 320      
Initial Cost of Buildings & Improvements 4,497      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 320      
Carrying Amount of Buildings and Improvements 4,497      
Accumulated Depreciation [1] $ 1,586      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1987      
Triple Net [Member] | Fort Ashby, WV, FTA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 19,566      
Cost Capitalized Subsequent to Acquisition 123      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 19,689      
Accumulated Depreciation [1] $ 2,464      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
Triple Net [Member] | Fort Collins, CO, FTC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,680      
Initial Cost of Buildings & Improvements 58,608      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,680      
Carrying Amount of Buildings and Improvements 58,608      
Accumulated Depreciation [1] $ 502      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | Fort Wayne, IN, FTW2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 170      
Initial Cost of Buildings & Improvements 8,232      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 170      
Carrying Amount of Buildings and Improvements 8,232      
Accumulated Depreciation [1] $ 1,926      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1994      
Triple Net [Member] | Fort Worth, TX, FWT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 450      
Initial Cost of Buildings & Improvements 13,615      
Cost Capitalized Subsequent to Acquisition 5,086      
Carrying Amount of Land 450      
Carrying Amount of Buildings and Improvements 18,701      
Accumulated Depreciation [1] $ 2,417      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1902      
Triple Net [Member] | Franconia, NH, FCN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 360      
Initial Cost of Buildings & Improvements 11,320      
Cost Capitalized Subsequent to Acquisition 70      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 11,390      
Accumulated Depreciation [1] $ 1,491      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
Triple Net [Member] | Franklin, NH, FKN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 15,210      
Cost Capitalized Subsequent to Acquisition 47      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 15,257      
Accumulated Depreciation [1] $ 1,978      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Frederick, MD, FDK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 18,942      
Carrying Amount of Land 2,550      
Carrying Amount of Buildings and Improvements 16,392      
Accumulated Depreciation [1] $ 78      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1999      
Triple Net [Member] | Fredericksburg, VA, FRD2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,000      
Initial Cost of Buildings & Improvements 20,000      
Cost Capitalized Subsequent to Acquisition 1,200      
Carrying Amount of Land 1,000      
Carrying Amount of Buildings and Improvements 21,200      
Accumulated Depreciation [1] $ 5,796      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2012      
Triple Net [Member] | Fredericksburg, VA, FRD4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 28,611      
Cost Capitalized Subsequent to Acquisition 35      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 28,646      
Accumulated Depreciation [1] $ 3,632      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1962      
Triple Net [Member] | Fredericksburg, VA, FRD5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 22,016      
Cost Capitalized Subsequent to Acquisition 59      
Carrying Amount of Land 3,700      
Carrying Amount of Buildings and Improvements 22,075      
Accumulated Depreciation [1] $ 1,856      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2012      
Triple Net [Member] | Fredericksburg, VA, FRD6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,130      
Initial Cost of Buildings & Improvements 23,202      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,130      
Carrying Amount of Buildings and Improvements 23,202      
Accumulated Depreciation [1] $ 728      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
Triple Net [Member] | Fredonia, KS, FDN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 40      
Initial Cost of Buildings & Improvements 460      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 460      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1990      
Triple Net [Member] | Fremont, CA, FRE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 18,860      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 25,300      
Cost Capitalized Subsequent to Acquisition 3,203      
Carrying Amount of Land 3,456      
Carrying Amount of Buildings and Improvements 28,447      
Accumulated Depreciation [1] $ 7,578      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1980      
Triple Net [Member] | Fresno, CA, FNO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,500      
Initial Cost of Buildings & Improvements 35,800      
Cost Capitalized Subsequent to Acquisition 118      
Carrying Amount of Land 2,500      
Carrying Amount of Buildings and Improvements 35,918      
Accumulated Depreciation [1] $ 6,803      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1992      
Triple Net [Member] | Gambrills, MD, GMB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,500      
Initial Cost of Buildings & Improvements 16,726      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,500      
Carrying Amount of Buildings and Improvements 16,726      
Accumulated Depreciation [1] $ 765      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2014      
Triple Net [Member] | Gardner, MA, GAR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 10,210      
Cost Capitalized Subsequent to Acquisition 27      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 10,237      
Accumulated Depreciation [1] $ 1,402      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Gardner, KS, GDN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 2,800      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 2,800      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1998      
Triple Net [Member] | Gardnerville, NV, GRD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 12,189      
Initial Cost of Land 1,143      
Initial Cost of Buildings & Improvements 10,831      
Cost Capitalized Subsequent to Acquisition 1,075      
Carrying Amount of Land 1,164      
Carrying Amount of Buildings and Improvements 11,885      
Accumulated Depreciation [1] $ 8,346      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1996      
Triple Net [Member] | Gastonia, NC, GST1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 470      
Initial Cost of Buildings & Improvements 6,129      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 470      
Carrying Amount of Buildings and Improvements 6,129      
Accumulated Depreciation [1] $ 2,100      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2005      
Triple Net [Member] | Gastonia, NC, GST2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 3,096      
Cost Capitalized Subsequent to Acquisition 22      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 3,118      
Accumulated Depreciation [1] $ 1,141      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1978      
Triple Net [Member] | Gastonia, NC, GST3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 5,029      
Cost Capitalized Subsequent to Acquisition 120      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 5,149      
Accumulated Depreciation [1] $ 1,780      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2002      
Triple Net [Member] | Georgetown, TX, GRG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 2,100      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 2,100      
Accumulated Depreciation [1] $ 1,027      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1997      
Triple Net [Member] | Gettysburg, PA, GTY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 8,913      
Cost Capitalized Subsequent to Acquisition 90      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 9,003      
Accumulated Depreciation [1] $ 1,295      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2007      
Triple Net [Member] | Gig Harbor, WA, GGH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 5,120      
Initial Cost of Land 1,560      
Initial Cost of Buildings & Improvements 15,947      
Cost Capitalized Subsequent to Acquisition 253      
Carrying Amount of Land 1,583      
Carrying Amount of Buildings and Improvements 16,177      
Accumulated Depreciation [1] $ 3,043      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1905      
Triple Net [Member] | Glastonbury, CT, GSY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,950      
Initial Cost of Buildings & Improvements 9,532      
Cost Capitalized Subsequent to Acquisition 909      
Carrying Amount of Land 2,360      
Carrying Amount of Buildings and Improvements 10,031      
Accumulated Depreciation [1] $ 1,420      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Glen Mills, PA, GLM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 690      
Initial Cost of Buildings & Improvements 9,110      
Cost Capitalized Subsequent to Acquisition 165      
Carrying Amount of Land 690      
Carrying Amount of Buildings and Improvements 9,275      
Accumulated Depreciation [1] $ 1,276      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Glenside, PA, GLS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,940      
Initial Cost of Buildings & Improvements 16,867      
Cost Capitalized Subsequent to Acquisition 153      
Carrying Amount of Land 1,940      
Carrying Amount of Buildings and Improvements 17,020      
Accumulated Depreciation [1] $ 2,265      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
Triple Net [Member] | Graceville, FL, GRA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 150      
Initial Cost of Buildings & Improvements 13,000      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 150      
Carrying Amount of Buildings and Improvements 13,000      
Accumulated Depreciation [1] $ 3,393      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1991      
Triple Net [Member] | Grafton, WV, GAT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 280      
Initial Cost of Buildings & Improvements 18,824      
Cost Capitalized Subsequent to Acquisition 37      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 18,861      
Accumulated Depreciation [1] $ 2,374      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2007      
Triple Net [Member] | Granbury, TX, GRB2, Senior Housing Triple Net [Member]        
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 149      
Carrying Amount of Land 2,040      
Carrying Amount of Buildings and Improvements 30,819      
Accumulated Depreciation [1] $ 3,824      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Granbury, TX, GRB3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,550      
Initial Cost of Buildings & Improvements 2,940      
Cost Capitalized Subsequent to Acquisition 400      
Carrying Amount of Land 2,550      
Carrying Amount of Buildings and Improvements 3,340      
Accumulated Depreciation [1] $ 362      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Triple Net [Member] | Grand Ledge, MI, GRL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,150      
Initial Cost of Buildings & Improvements 16,286      
Cost Capitalized Subsequent to Acquisition 5,119      
Carrying Amount of Land 1,150      
Carrying Amount of Buildings and Improvements 21,405      
Accumulated Depreciation [1] $ 2,568      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2013      
Triple Net [Member] | Granger, IN, GGR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,670      
Initial Cost of Buildings & Improvements 21,280      
Cost Capitalized Subsequent to Acquisition 2,401      
Carrying Amount of Land 1,670      
Carrying Amount of Buildings and Improvements 23,681      
Accumulated Depreciation [1] $ 3,154      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Grapevine, TX, GPV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 19,692      
Carrying Amount of Land 2,220      
Carrying Amount of Buildings and Improvements 17,472      
Accumulated Depreciation [1] $ 220      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1999      
Triple Net [Member] | Grass Valley, CA, GVL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 4,268      
Initial Cost of Land 260      
Initial Cost of Buildings & Improvements 7,667      
Cost Capitalized Subsequent to Acquisition 170      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 7,837      
Accumulated Depreciation [1] $ 426      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2001      
Triple Net [Member] | Greendale, WI, GND, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 35,383      
Cost Capitalized Subsequent to Acquisition 522      
Carrying Amount of Land 2,060      
Carrying Amount of Buildings and Improvements 35,905      
Accumulated Depreciation [1] $ 3,566      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2006      
Triple Net [Member] | Greeneville, TN, GNE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 8,290      
Cost Capitalized Subsequent to Acquisition 507      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 8,797      
Accumulated Depreciation [1] $ 2,882      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2005      
Triple Net [Member] | Greenfield, WI, GFD2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 15,204      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 14,314      
Accumulated Depreciation [1] $ 885      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1993      
Triple Net [Member] | Greensboro, NC, GSB1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 2,970      
Cost Capitalized Subsequent to Acquisition 554      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 3,524      
Accumulated Depreciation [1] $ 1,262      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1966      
Triple Net [Member] | Greensboro, NC, GSB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 5,507      
Cost Capitalized Subsequent to Acquisition 1,013      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 6,520      
Accumulated Depreciation [1] $ 2,316      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2007      
Triple Net [Member] | Greensboro, NC, GSB3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 350      
Initial Cost of Buildings & Improvements 6,634      
Cost Capitalized Subsequent to Acquisition 572      
Carrying Amount of Land 350      
Carrying Amount of Buildings and Improvements 7,206      
Accumulated Depreciation [1] $ 230      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1987      
Triple Net [Member] | Greenville, SC, GNV, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 4,750      
Accumulated Depreciation [1] $ 1,572      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1980      
Triple Net [Member] | Greenville, NC, GRV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 4,393      
Cost Capitalized Subsequent to Acquisition 168      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 4,561      
Accumulated Depreciation [1] $ 1,559      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
Triple Net [Member] | Greenwood, IN, GWD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,550      
Initial Cost of Buildings & Improvements 22,770      
Cost Capitalized Subsequent to Acquisition 81      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 22,851      
Accumulated Depreciation [1] $ 3,138      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1992      
Triple Net [Member] | Groton, CT, GOT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,430      
Initial Cost of Buildings & Improvements 19,941      
Cost Capitalized Subsequent to Acquisition 895      
Carrying Amount of Land 2,430      
Carrying Amount of Buildings and Improvements 20,836      
Accumulated Depreciation [1] $ 2,912      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Haddonfield, NJ, HDF2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 16,883      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 16,363      
Accumulated Depreciation [1] $ 288      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2004      
Triple Net [Member] | Hamburg, PA, HMB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 840      
Initial Cost of Buildings & Improvements 10,543      
Cost Capitalized Subsequent to Acquisition 191      
Carrying Amount of Land 840      
Carrying Amount of Buildings and Improvements 10,734      
Accumulated Depreciation [1] $ 1,595      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Hamilton, NJ, HAM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 440      
Initial Cost of Buildings & Improvements 4,469      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 4,469      
Accumulated Depreciation [1] $ 1,667      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1994      
Triple Net [Member] | Hanford, UKG, HNF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,652      
Initial Cost of Buildings & Improvements 11,748      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,652      
Carrying Amount of Buildings and Improvements 11,748      
Accumulated Depreciation [1] $ 750      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1999      
Triple Net [Member] | Hanover, IN, HVR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 210      
Initial Cost of Buildings & Improvements 4,430      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 210      
Carrying Amount of Buildings and Improvements 4,430      
Accumulated Depreciation [1] $ 1,499      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1999      
Triple Net [Member] | Harleysville, PA, HRV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 11,355      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 11,355      
Accumulated Depreciation [1] $ 1,999      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2000      
Triple Net [Member] | Harriman, TN, HAR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 8,060      
Cost Capitalized Subsequent to Acquisition 158      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 8,218      
Accumulated Depreciation [1] $ 3,374      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2015      
Triple Net [Member] | Harrow, UKI, HRW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 8,848      
Initial Cost of Buildings & Improvements 9,880      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 8,848      
Carrying Amount of Buildings and Improvements 9,880      
Accumulated Depreciation [1] $ 296      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
Triple Net [Member] | Hatboro, PA, HTB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 28,112      
Cost Capitalized Subsequent to Acquisition 1,746      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 29,858      
Accumulated Depreciation [1] $ 3,706      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
Triple Net [Member] | Hatfield, UKH, HTF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,495      
Initial Cost of Buildings & Improvements 8,997      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,495      
Carrying Amount of Buildings and Improvements 8,997      
Accumulated Depreciation [1] $ 579      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2007      
Triple Net [Member] | Haverford, PA, HVF, Senior Housing Triple Net [Member]        
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 836      
Carrying Amount of Land 1,883      
Carrying Amount of Buildings and Improvements 34,826      
Accumulated Depreciation [1] $ 4,449      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2014      
Triple Net [Member] | Hemet, CA, HEM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 870      
Initial Cost of Buildings & Improvements 3,405      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 870      
Carrying Amount of Buildings and Improvements 3,405      
Accumulated Depreciation [1] $ 760      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2009      
Triple Net [Member] | Hemet, CA, HEM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,890      
Initial Cost of Buildings & Improvements 28,606      
Cost Capitalized Subsequent to Acquisition 985      
Carrying Amount of Land 1,899      
Carrying Amount of Buildings and Improvements 29,582      
Accumulated Depreciation [1] $ 8,109      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2014      
Triple Net [Member] | Hemet, CA, HEM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 9,630      
Cost Capitalized Subsequent to Acquisition 921      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 10,551      
Accumulated Depreciation [1] $ 1,705      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1977      
Triple Net [Member] | Herne Bay, UKJ, HBY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,271      
Initial Cost of Buildings & Improvements 29,109      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,271      
Carrying Amount of Buildings and Improvements 29,109      
Accumulated Depreciation [1] $ 2,196      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1996      
Triple Net [Member] | Hiawatha, KS, HWT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 40      
Initial Cost of Buildings & Improvements 4,210      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 4,210      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2009      
Triple Net [Member] | Hickory, NC, HCY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 987      
Cost Capitalized Subsequent to Acquisition 232      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 1,219      
Accumulated Depreciation [1] $ 581      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1988      
Triple Net [Member] | High Point, NC, HPT1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 4,443      
Cost Capitalized Subsequent to Acquisition 793      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 5,236      
Accumulated Depreciation [1] $ 1,838      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2015      
Triple Net [Member] | High Point, NC, HPT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 370      
Initial Cost of Buildings & Improvements 2,185      
Cost Capitalized Subsequent to Acquisition 410      
Carrying Amount of Land 370      
Carrying Amount of Buildings and Improvements 2,595      
Accumulated Depreciation [1] $ 973      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2009      
Triple Net [Member] | High Point, NC, HPT3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 3,395      
Cost Capitalized Subsequent to Acquisition 28      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 3,423      
Accumulated Depreciation [1] $ 1,211      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2001      
Triple Net [Member] | High Point, NC, HPT4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 4,143      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 4,143      
Accumulated Depreciation [1] $ 1,452      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
Triple Net [Member] | High River, AB, HHR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 954      
Initial Cost of Buildings & Improvements 34,317      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 954      
Carrying Amount of Buildings and Improvements 34,317      
Accumulated Depreciation [1] $ 985      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1966      
Triple Net [Member] | Highland Park, IL, HDP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,820      
Initial Cost of Buildings & Improvements 15,832      
Cost Capitalized Subsequent to Acquisition 189      
Carrying Amount of Land 2,820      
Carrying Amount of Buildings and Improvements 16,021      
Accumulated Depreciation [1] $ 1,293      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Highlands Ranch, CO, HLR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 3,721      
Cost Capitalized Subsequent to Acquisition 4,983      
Carrying Amount of Land 940      
Carrying Amount of Buildings and Improvements 8,704      
Accumulated Depreciation [1] $ 1,666      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2012      
Triple Net [Member] | Hilltop, WV, HLP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 25,355      
Cost Capitalized Subsequent to Acquisition 15      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 25,370      
Accumulated Depreciation [1] $ 3,247      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
Triple Net [Member] | Hinckley, UKF, HNK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,581      
Initial Cost of Buildings & Improvements 5,013      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,581      
Carrying Amount of Buildings and Improvements 5,013      
Accumulated Depreciation [1] $ 353      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2009      
Triple Net [Member] | Hockessin, DE, HCK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,120      
Initial Cost of Buildings & Improvements 6,308      
Cost Capitalized Subsequent to Acquisition 889      
Carrying Amount of Land 1,120      
Carrying Amount of Buildings and Improvements 7,197      
Accumulated Depreciation [1] $ 279      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1989      
Triple Net [Member] | Hollywood, FL, HLY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,240      
Initial Cost of Buildings & Improvements 13,806      
Cost Capitalized Subsequent to Acquisition 436      
Carrying Amount of Land 1,240      
Carrying Amount of Buildings and Improvements 14,242      
Accumulated Depreciation [1] $ 1,257      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2013      
Triple Net [Member] | Holton, KS, HON, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 40      
Initial Cost of Buildings & Improvements 7,460      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 7,460      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1994      
Triple Net [Member] | Homestead, FL, HMS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,750      
Initial Cost of Buildings & Improvements 11,750      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,750      
Carrying Amount of Buildings and Improvements 11,750      
Accumulated Depreciation [1] $ 3,137      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1998      
Triple Net [Member] | Houston, TX, HOU7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 5,090      
Initial Cost of Buildings & Improvements 9,471      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 5,090      
Carrying Amount of Buildings and Improvements 9,471      
Accumulated Depreciation [1] $ 1,882      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1986      
Triple Net [Member] | Howell, NJ, HWL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,470      
Initial Cost of Land 1,066      
Initial Cost of Buildings & Improvements 21,577      
Cost Capitalized Subsequent to Acquisition 270      
Carrying Amount of Land 1,069      
Carrying Amount of Buildings and Improvements 21,844      
Accumulated Depreciation [1] $ 2,900      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2014      
Triple Net [Member] | Huntington, WV, HNT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 32,261      
Cost Capitalized Subsequent to Acquisition 126      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 32,387      
Accumulated Depreciation [1] $ 4,155      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Huron, OH, HUR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 160      
Initial Cost of Buildings & Improvements 6,088      
Cost Capitalized Subsequent to Acquisition 1,452      
Carrying Amount of Land 160      
Carrying Amount of Buildings and Improvements 7,540      
Accumulated Depreciation [1] $ 2,028      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1981      
Triple Net [Member] | Hurricane, WV, HRC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 620      
Initial Cost of Buildings & Improvements 21,454      
Cost Capitalized Subsequent to Acquisition 804      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 22,258      
Accumulated Depreciation [1] $ 2,862      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Hutchinson, KS, HTC, Senior Housing Triple Net [Member]        
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 194      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 10,784      
Accumulated Depreciation [1] $ 3,173      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1900      
Triple Net [Member] | Indianapolis, IN, IND2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 495      
Initial Cost of Buildings & Improvements 6,287      
Cost Capitalized Subsequent to Acquisition 22,565      
Carrying Amount of Land 495      
Carrying Amount of Buildings and Improvements 28,852      
Accumulated Depreciation [1] $ 9,194      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2001      
Triple Net [Member] | Indianapolis, IN, IND3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 255      
Initial Cost of Buildings & Improvements 2,473      
Cost Capitalized Subsequent to Acquisition 12,123      
Carrying Amount of Land 255      
Carrying Amount of Buildings and Improvements 14,596      
Accumulated Depreciation [1] $ 4,552      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1984      
Triple Net [Member] | Indianapolis, IN, IND4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 870      
Initial Cost of Buildings & Improvements 14,688      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 870      
Carrying Amount of Buildings and Improvements 14,688      
Accumulated Depreciation [1] $ 499      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Indianapolis, IN, IND5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 890      
Initial Cost of Buildings & Improvements 18,781      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 18,781      
Accumulated Depreciation [1] $ 570      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1966      
Triple Net [Member] | Jackson, NJ, JCS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 6,500      
Initial Cost of Buildings & Improvements 26,405      
Cost Capitalized Subsequent to Acquisition 2,193      
Carrying Amount of Land 6,500      
Carrying Amount of Buildings and Improvements 28,598      
Accumulated Depreciation [1] $ 2,346      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
Triple Net [Member] | Jacksonville Beach, FL, JKB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,210      
Initial Cost of Buildings & Improvements 26,207      
Cost Capitalized Subsequent to Acquisition 472      
Carrying Amount of Land 1,210      
Carrying Amount of Buildings and Improvements 26,679      
Accumulated Depreciation [1] $ 2,282      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Jamestown, TN, JME, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 6,707      
Cost Capitalized Subsequent to Acquisition 508      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 7,215      
Accumulated Depreciation [1] $ 5,289      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2010      
Triple Net [Member] | Jefferson, OH, JEF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 80      
Initial Cost of Buildings & Improvements 9,120      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 80      
Carrying Amount of Buildings and Improvements 9,120      
Accumulated Depreciation [1] $ 2,664      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1964      
Triple Net [Member] | Jupiter, FL, JUP3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,100      
Initial Cost of Buildings & Improvements 47,453      
Cost Capitalized Subsequent to Acquisition 563      
Carrying Amount of Land 3,100      
Carrying Amount of Buildings and Improvements 48,016      
Accumulated Depreciation [1] $ 3,950      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2014      
Triple Net [Member] | Kansas City, KS, KNS7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 20,116      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 20,116      
Accumulated Depreciation [1] $ 45      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1968      
Triple Net [Member] | Keene, NH, KNE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 9,639      
Cost Capitalized Subsequent to Acquisition 284      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 9,923      
Accumulated Depreciation [1] $ 1,259      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2014      
Triple Net [Member] | Kenner, LA, KNN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,100      
Initial Cost of Buildings & Improvements 10,036      
Cost Capitalized Subsequent to Acquisition 328      
Carrying Amount of Land 1,100      
Carrying Amount of Buildings and Improvements 10,364      
Accumulated Depreciation [1] $ 8,040      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 2009      
Triple Net [Member] | Kennesaw, GA, KNW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 10,848      
Cost Capitalized Subsequent to Acquisition 388      
Carrying Amount of Land 940      
Carrying Amount of Buildings and Improvements 11,236      
Accumulated Depreciation [1] $ 1,006      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Kennett Square, PA, KTS, Senior Housing Triple Net [Member]        
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 239      
Carrying Amount of Land 1,083      
Carrying Amount of Buildings and Improvements 23,151      
Accumulated Depreciation [1] $ 2,993      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1928      
Triple Net [Member] | Kennewick, WA, KNK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 27,991      
Cost Capitalized Subsequent to Acquisition 715      
Carrying Amount of Land 1,834      
Carrying Amount of Buildings and Improvements 28,692      
Accumulated Depreciation [1] $ 6,421      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | Kent, WA, KNT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 20,318      
Cost Capitalized Subsequent to Acquisition 10,470      
Carrying Amount of Land 940      
Carrying Amount of Buildings and Improvements 30,788      
Accumulated Depreciation [1] $ 6,082      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1998      
Triple Net [Member] | Kirkland, WA, KRK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,880      
Initial Cost of Buildings & Improvements 4,315      
Cost Capitalized Subsequent to Acquisition 683      
Carrying Amount of Land 1,880      
Carrying Amount of Buildings and Improvements 4,998      
Accumulated Depreciation [1] $ 1,554      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2014      
Triple Net [Member] | Kirkstall, UKE, KKS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,912      
Initial Cost of Buildings & Improvements 11,253      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,912      
Carrying Amount of Buildings and Improvements 11,253      
Accumulated Depreciation [1] $ 720      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1980      
Triple Net [Member] | Kokomo, IN, KKM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 710      
Initial Cost of Buildings & Improvements 16,044      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 710      
Carrying Amount of Buildings and Improvements 16,044      
Accumulated Depreciation [1] $ 544      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
Triple Net [Member] | Laconia, NH, LAC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 810      
Initial Cost of Buildings & Improvements 14,434      
Cost Capitalized Subsequent to Acquisition 496      
Carrying Amount of Land 810      
Carrying Amount of Buildings and Improvements 14,930      
Accumulated Depreciation [1] $ 1,963      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1981      
Triple Net [Member] | Lafayette, CO, LAA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,420      
Initial Cost of Buildings & Improvements 20,192      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,420      
Carrying Amount of Buildings and Improvements 20,192      
Accumulated Depreciation [1] $ 288      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lafayette, IN, LAT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 670      
Initial Cost of Buildings & Improvements 16,833      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 16,833      
Accumulated Depreciation [1] $ 375      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
Triple Net [Member] | Lafayette, LA, 1167, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,928      
Initial Cost of Buildings & Improvements 10,483      
Cost Capitalized Subsequent to Acquisition 25      
Carrying Amount of Land 1,928      
Carrying Amount of Buildings and Improvements 10,509      
Accumulated Depreciation [1] $ 3,650      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1993      
Triple Net [Member] | Lake Barrington, IL, LKB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 66,179      
Cost Capitalized Subsequent to Acquisition 46      
Carrying Amount of Land 3,400      
Carrying Amount of Buildings and Improvements 66,225      
Accumulated Depreciation [1] $ 5,448      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Lake Zurich, IL, LKZ, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 1,470      
Carrying Amount of Buildings and Improvements 9,830      
Accumulated Depreciation [1] $ 1,245      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lakeway, TX, 1331, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 5,142      
Initial Cost of Buildings & Improvements 18,574      
Cost Capitalized Subsequent to Acquisition 3,029      
Carrying Amount of Land 5,142      
Carrying Amount of Buildings and Improvements 21,603      
Accumulated Depreciation [1] $ 1,214      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2005      
Triple Net [Member] | Lakewood, CO, LKE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,160      
Initial Cost of Buildings & Improvements 28,091      
Cost Capitalized Subsequent to Acquisition 49      
Carrying Amount of Land 2,160      
Carrying Amount of Buildings and Improvements 28,140      
Accumulated Depreciation [1] $ 1,350      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lakewood Ranch, FL, LWR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 650      
Initial Cost of Buildings & Improvements 6,714      
Cost Capitalized Subsequent to Acquisition 1,988      
Carrying Amount of Land 650      
Carrying Amount of Buildings and Improvements 8,702      
Accumulated Depreciation [1] $ 751      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Lakewood Ranch, FL, LWR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 6,981      
Initial Cost of Land 1,000      
Initial Cost of Buildings & Improvements 22,388      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,000      
Carrying Amount of Buildings and Improvements 22,388      
Accumulated Depreciation [1] $ 2,059      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2007      
Triple Net [Member] | Lancaster, CA, LAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,742      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 15,295      
Cost Capitalized Subsequent to Acquisition 625      
Carrying Amount of Land 712      
Carrying Amount of Buildings and Improvements 15,907      
Accumulated Depreciation [1] $ 3,391      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2012      
Triple Net [Member] | Lancaster, PA, LCR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 890      
Initial Cost of Buildings & Improvements 7,623      
Cost Capitalized Subsequent to Acquisition 79      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 7,702      
Accumulated Depreciation [1] $ 1,142      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Lancaster, NH, LCT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 15,804      
Cost Capitalized Subsequent to Acquisition 160      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 15,964      
Accumulated Depreciation [1] $ 2,059      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1986      
Triple Net [Member] | Lancaster, NH, LCT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 160      
Initial Cost of Buildings & Improvements 434      
Cost Capitalized Subsequent to Acquisition 28      
Carrying Amount of Land 160      
Carrying Amount of Buildings and Improvements 462      
Accumulated Depreciation [1] $ 116      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Triple Net [Member] | Langhorne, PA, LGH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 24,881      
Cost Capitalized Subsequent to Acquisition 117      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 24,998      
Accumulated Depreciation [1] $ 3,316      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | LaPlata, MD, LPL4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 700      
Initial Cost of Buildings & Improvements [2] 19,068      
Cost Capitalized Subsequent to Acquisition [2] 466      
Carrying Amount of Land [2] 700      
Carrying Amount of Buildings and Improvements [2] 19,534      
Accumulated Depreciation [1],[2] $ 2,563      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 1900      
Triple Net [Member] | Las Vegas, NV, LSV7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 580      
Initial Cost of Buildings & Improvements 23,420      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 580      
Carrying Amount of Buildings and Improvements 23,420      
Accumulated Depreciation [1] $ 2,715      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1969      
Triple Net [Member] | Lawrence, KS, LWN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 3,497      
Initial Cost of Land 250      
Initial Cost of Buildings & Improvements 8,716      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 250      
Carrying Amount of Buildings and Improvements 8,716      
Accumulated Depreciation [1] $ 792      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Triple Net [Member] | Lebanon, NH, LEB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 550      
Initial Cost of Buildings & Improvements 20,138      
Cost Capitalized Subsequent to Acquisition 64      
Carrying Amount of Land 550      
Carrying Amount of Buildings and Improvements 20,202      
Accumulated Depreciation [1] $ 2,612      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1989      
Triple Net [Member] | Lecanto, FL, LEC, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 6,900      
Accumulated Depreciation [1] $ 2,191      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2007      
Triple Net [Member] | Lee, MA, LAL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 18,135      
Cost Capitalized Subsequent to Acquisition 926      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 19,061      
Accumulated Depreciation [1] $ 7,035      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1905      
Triple Net [Member] | Leeds, UKE, LEE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,359      
Initial Cost of Buildings & Improvements 15,824      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,359      
Carrying Amount of Buildings and Improvements 15,824      
Accumulated Depreciation [1] $ 276      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2011      
Triple Net [Member] | Leicester, UKF, LEI, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,657      
Initial Cost of Buildings & Improvements 29,177      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,657      
Carrying Amount of Buildings and Improvements 29,177      
Accumulated Depreciation [1] $ 2,309      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Triple Net [Member] | Lenoir, NC, LNR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 3,748      
Cost Capitalized Subsequent to Acquisition 641      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 4,389      
Accumulated Depreciation [1] $ 1,533      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1984      
Triple Net [Member] | Leominster, MA, LMT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 6,201      
Cost Capitalized Subsequent to Acquisition 25      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 6,226      
Accumulated Depreciation [1] $ 945      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lethbridge, AB, LTB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 1,487      
Initial Cost of Land 1,214      
Initial Cost of Buildings & Improvements 2,750      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,214      
Carrying Amount of Buildings and Improvements 2,750      
Accumulated Depreciation [1] $ 113      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1996      
Triple Net [Member] | Lethbridge, AB, LTB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 3,052      
Initial Cost of Land 618      
Initial Cost of Buildings & Improvements 6,855      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 618      
Carrying Amount of Buildings and Improvements 6,855      
Accumulated Depreciation [1] $ 197      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2012      
Triple Net [Member] | Lewisburg, WV, LWG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 260      
Initial Cost of Buildings & Improvements 3,699      
Cost Capitalized Subsequent to Acquisition 70      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 3,769      
Accumulated Depreciation [1] $ 572      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Lexana, KS, LEN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 480      
Initial Cost of Buildings & Improvements 1,770      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 1,770      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lexington, KY, LEX, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,980      
Initial Cost of Buildings & Improvements 21,258      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,980      
Carrying Amount of Buildings and Improvements 21,258      
Accumulated Depreciation [1] $ 692      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
Triple Net [Member] | Lexington, NC, LXN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 3,900      
Cost Capitalized Subsequent to Acquisition 1,015      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 4,915      
Accumulated Depreciation [1] $ 1,780      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2002      
Triple Net [Member] | Libertyville, IL, LIB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 6,500      
Initial Cost of Buildings & Improvements 40,024      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,500      
Carrying Amount of Buildings and Improvements 40,024      
Accumulated Depreciation [1] $ 5,165      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Triple Net [Member] | Lichfield, UKG, LCF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,652      
Initial Cost of Buildings & Improvements 36,246      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,652      
Carrying Amount of Buildings and Improvements 36,246      
Accumulated Depreciation [1] $ 701      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2007      
Triple Net [Member] | Lillington, NC, LLT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 470      
Initial Cost of Buildings & Improvements 17,579      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 470      
Carrying Amount of Buildings and Improvements 17,579      
Accumulated Depreciation [1] $ 575      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lillington, NC, LLT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 500      
Initial Cost of Buildings & Improvements 16,451      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 500      
Carrying Amount of Buildings and Improvements 16,451      
Accumulated Depreciation [1] $ 506      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Lincoln, NE, LNC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 390      
Initial Cost of Buildings & Improvements 13,807      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 13,807      
Accumulated Depreciation [1] $ 2,059      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1971      
Triple Net [Member] | Linwood, NJ, LNW, Senior Housing Triple Net [Member]        
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 799      
Carrying Amount of Land 838      
Carrying Amount of Buildings and Improvements 22,745      
Accumulated Depreciation [1] $ 3,041      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2003      
Triple Net [Member] | Linwood, NJ, LNW2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,310      
Initial Cost of Buildings & Improvements 14,912      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,310      
Carrying Amount of Buildings and Improvements 14,912      
Accumulated Depreciation [1] $ 37      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1900      
Triple Net [Member] | Litchfield, CT, LTH2, Senior Housing Triple Net [Member]        
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 10,893      
Carrying Amount of Land 1,250      
Carrying Amount of Buildings and Improvements 28,792      
Accumulated Depreciation [1] $ 2,504      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
Triple Net [Member] | Little Neck, NY, LTN, Senior Housing Triple Net [Member]        
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 1,176      
Carrying Amount of Land 3,357      
Carrying Amount of Buildings and Improvements 39,630      
Accumulated Depreciation [1] $ 5,138      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
Triple Net [Member] | Livermore, CA, LVM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,837      
Initial Cost of Land 4,100      
Initial Cost of Buildings & Improvements 24,996      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,100      
Carrying Amount of Buildings and Improvements 24,996      
Accumulated Depreciation [1] $ 740      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2015      
Triple Net [Member] | Loganville, GA, LOG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,430      
Initial Cost of Buildings & Improvements 22,912      
Cost Capitalized Subsequent to Acquisition 557      
Carrying Amount of Land 1,430      
Carrying Amount of Buildings and Improvements 23,469      
Accumulated Depreciation [1] $ 2,174      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1900      
Triple Net [Member] | London, UKI, LDN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 20,792      
Initial Cost of Buildings & Improvements 182,448      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 20,792      
Carrying Amount of Buildings and Improvements 182,448      
Accumulated Depreciation [1] $ 3,824      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2006      
Triple Net [Member] | London, UKI, LDN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,719      
Initial Cost of Buildings & Improvements 32,497      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,719      
Carrying Amount of Buildings and Improvements 32,497      
Accumulated Depreciation [1] $ 681      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2013      
Triple Net [Member] | London, UKI, LDN4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 6,046      
Initial Cost of Buildings & Improvements 13,355      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,046      
Carrying Amount of Buildings and Improvements 13,355      
Accumulated Depreciation [1] $ 280      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1998      
Triple Net [Member] | Longview, TX, LGV3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 610      
Initial Cost of Buildings & Improvements 5,520      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 610      
Carrying Amount of Buildings and Improvements 5,520      
Accumulated Depreciation [1] $ 1,278      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1999      
Triple Net [Member] | Longwood, FL, LGW2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,260      
Initial Cost of Buildings & Improvements 6,445      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,260      
Carrying Amount of Buildings and Improvements 6,445      
Accumulated Depreciation [1] $ 792      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Louisburg, KS, LSB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 280      
Initial Cost of Buildings & Improvements 4,320      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 4,320      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1995      
Triple Net [Member] | Louisville, KY, LOU2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 490      
Initial Cost of Buildings & Improvements 10,010      
Cost Capitalized Subsequent to Acquisition 2,768      
Carrying Amount of Land 490      
Carrying Amount of Buildings and Improvements 12,778      
Accumulated Depreciation [1] $ 3,822      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1998      
Triple Net [Member] | Louisville, KY, MEA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 7,135      
Cost Capitalized Subsequent to Acquisition 163      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 7,298      
Accumulated Depreciation [1] $ 3,007      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1991      
Triple Net [Member] | Louisville, KY, MSO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 350      
Initial Cost of Buildings & Improvements 4,675      
Cost Capitalized Subsequent to Acquisition 133      
Carrying Amount of Land 350      
Carrying Amount of Buildings and Improvements 4,808      
Accumulated Depreciation [1] $ 2,010      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1999      
Triple Net [Member] | Lowell, MA, LWL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,070      
Initial Cost of Buildings & Improvements 13,481      
Cost Capitalized Subsequent to Acquisition 103      
Carrying Amount of Land 1,070      
Carrying Amount of Buildings and Improvements 13,584      
Accumulated Depreciation [1] $ 1,887      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1987      
Triple Net [Member] | Lowell, MA, LWL3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 680      
Initial Cost of Buildings & Improvements 3,378      
Cost Capitalized Subsequent to Acquisition 30      
Carrying Amount of Land 680      
Carrying Amount of Buildings and Improvements 3,408      
Accumulated Depreciation [1] $ 579      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Loxley, UKE, SFD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,637      
Initial Cost of Buildings & Improvements 18,727      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,637      
Carrying Amount of Buildings and Improvements 18,727      
Accumulated Depreciation [1] $ 1,405      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1999      
Triple Net [Member] | Lutherville, MD, LTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,100      
Initial Cost of Buildings & Improvements 19,786      
Cost Capitalized Subsequent to Acquisition 1,579      
Carrying Amount of Land 1,100      
Carrying Amount of Buildings and Improvements 21,365      
Accumulated Depreciation [1] $ 2,706      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Triple Net [Member] | Lynchburg, VA, LYB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 340      
Initial Cost of Buildings & Improvements 16,114      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 340      
Carrying Amount of Buildings and Improvements 16,114      
Accumulated Depreciation [1] $ 532      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1986      
Triple Net [Member] | Macungie, PA, MCG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 29,033      
Cost Capitalized Subsequent to Acquisition 16      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 29,049      
Accumulated Depreciation [1] $ 3,700      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1968      
Triple Net [Member] | Mahwah, NJ, MAH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 28,844      
Carrying Amount of Land 1,605      
Carrying Amount of Buildings and Improvements 27,239      
Accumulated Depreciation [1] $ 408      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1978      
Triple Net [Member] | Manahawkin, NJ, MNK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,020      
Initial Cost of Buildings & Improvements 20,361      
Cost Capitalized Subsequent to Acquisition 122      
Carrying Amount of Land 1,020      
Carrying Amount of Buildings and Improvements 20,483      
Accumulated Depreciation [1] $ 2,694      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Manalapan, NJ, MNL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 22,624      
Cost Capitalized Subsequent to Acquisition 257      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 22,881      
Accumulated Depreciation [1] $ 2,592      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
Triple Net [Member] | Manassas, VA, MNS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 750      
Initial Cost of Buildings & Improvements 7,446      
Cost Capitalized Subsequent to Acquisition 530      
Carrying Amount of Land 750      
Carrying Amount of Buildings and Improvements 7,976      
Accumulated Depreciation [1] $ 2,513      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
Triple Net [Member] | Manchester, NH, MCH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,080      
Initial Cost of Buildings & Improvements 3,059      
Cost Capitalized Subsequent to Acquisition 581      
Carrying Amount of Land 1,080      
Carrying Amount of Buildings and Improvements 3,640      
Accumulated Depreciation [1] $ 122      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
Triple Net [Member] | Mankato, MN, MKA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 12,839      
Initial Cost of Land 1,460      
Initial Cost of Buildings & Improvements 32,104      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 32,104      
Accumulated Depreciation [1] $ 138      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
Triple Net [Member] | Mansfield, TX, MSF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 660      
Initial Cost of Buildings & Improvements 5,251      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 660      
Carrying Amount of Buildings and Improvements 5,251      
Accumulated Depreciation [1] $ 1,229      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1998      
Triple Net [Member] | Manteca, CA, MCA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 5,987      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 12,125      
Cost Capitalized Subsequent to Acquisition 1,566      
Carrying Amount of Land 1,312      
Carrying Amount of Buildings and Improvements 13,679      
Accumulated Depreciation [1] $ 4,039      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2001      
Triple Net [Member] | Marianna, FL, MAR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 340      
Initial Cost of Buildings & Improvements 8,910      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 340      
Carrying Amount of Buildings and Improvements 8,910      
Accumulated Depreciation [1] $ 2,319      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1971      
Triple Net [Member] | Marietta, GA, MRA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,270      
Initial Cost of Buildings & Improvements 10,519      
Cost Capitalized Subsequent to Acquisition 447      
Carrying Amount of Land 1,270      
Carrying Amount of Buildings and Improvements 10,966      
Accumulated Depreciation [1] $ 962      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1975      
Triple Net [Member] | Marietta, PA, MTT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 13,633      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 13,633      
Accumulated Depreciation [1] $ 150      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | Marion, IN, MRN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 12,750      
Cost Capitalized Subsequent to Acquisition 1,136      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 13,886      
Accumulated Depreciation [1] $ 446      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
Triple Net [Member] | Marion, IN, MRN4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 990      
Initial Cost of Buildings & Improvements 9,190      
Cost Capitalized Subsequent to Acquisition 824      
Carrying Amount of Land 990      
Carrying Amount of Buildings and Improvements 10,014      
Accumulated Depreciation [1] $ 382      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
Triple Net [Member] | Marlborough, UKK, MRB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,200      
Initial Cost of Buildings & Improvements 8,155      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,200      
Carrying Amount of Buildings and Improvements 8,155      
Accumulated Depreciation [1] $ 239      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1984      
Triple Net [Member] | Marlinton, WV, MAO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 270      
Initial Cost of Buildings & Improvements 8,430      
Cost Capitalized Subsequent to Acquisition 11      
Carrying Amount of Land 270      
Carrying Amount of Buildings and Improvements 8,441      
Accumulated Depreciation [1] $ 1,135      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2003      
Triple Net [Member] | Marlton, NJ, MRL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 38,300      
Cost Capitalized Subsequent to Acquisition 2,894      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 41,194      
Accumulated Depreciation [1] $ 7,404      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1989      
Triple Net [Member] | Marmet, WV, MMT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 540      
Initial Cost of Buildings & Improvements 26,483      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 540      
Carrying Amount of Buildings and Improvements 26,483      
Accumulated Depreciation [1] $ 3,322      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
Triple Net [Member] | Martinsburg, WV, MTG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 340      
Initial Cost of Buildings & Improvements 17,180      
Cost Capitalized Subsequent to Acquisition 50      
Carrying Amount of Land 340      
Carrying Amount of Buildings and Improvements 17,230      
Accumulated Depreciation [1] $ 2,178      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Martinsville, VA, MTN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 349      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 349      
Carrying Amount of Buildings and Improvements 0      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
Triple Net [Member] | Marysville, WA, MRS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 4,436      
Initial Cost of Land 620      
Initial Cost of Buildings & Improvements 4,780      
Cost Capitalized Subsequent to Acquisition 903      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 5,683      
Accumulated Depreciation [1] $ 1,738      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2013      
Triple Net [Member] | Matawan, NJ, MTW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,830      
Initial Cost of Buildings & Improvements 20,618      
Cost Capitalized Subsequent to Acquisition 7      
Carrying Amount of Land 1,830      
Carrying Amount of Buildings and Improvements 20,625      
Accumulated Depreciation [1] $ 2,360      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1995      
Triple Net [Member] | Matthews, NC, MTH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 4,738      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 4,738      
Accumulated Depreciation [1] $ 1,699      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1995      
Triple Net [Member] | McHenry, IL, MHY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,576      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,576      
Carrying Amount of Buildings and Improvements 0      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1998      
Triple Net [Member] | McKinney, TX, MKY2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,570      
Initial Cost of Buildings & Improvements 7,389      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,570      
Carrying Amount of Buildings and Improvements 7,389      
Accumulated Depreciation [1] $ 1,237      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 2013      
Triple Net [Member] | McMinnville, OR, MML, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 7,984      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 7,984      
Accumulated Depreciation [1] $ 138      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1994      
Triple Net [Member] | McMurray, PA, MCM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 15,805      
Cost Capitalized Subsequent to Acquisition 3,601      
Carrying Amount of Land 1,440      
Carrying Amount of Buildings and Improvements 19,406      
Accumulated Depreciation [1] $ 1,998      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
Triple Net [Member] | Mechanicsburg, PA, MCS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 16,650      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 16,650      
Accumulated Depreciation [1] $ 1,976      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
Triple Net [Member] | Medicine Hat, AB, MEH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,440      
Initial Cost of Land 932      
Initial Cost of Buildings & Improvements 5,566      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 932      
Carrying Amount of Buildings and Improvements 5,566      
Accumulated Depreciation [1] $ 180      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Melbourne, FL, MEL, Senior Housing Triple Net [Member]        
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 13,444      
Carrying Amount of Land 7,070      
Carrying Amount of Buildings and Improvements 61,701      
Accumulated Depreciation [1] $ 9,939      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1975      
Triple Net [Member] | Melville, NY, MLV, Senior Housing Triple Net [Member]        
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 3,798      
Carrying Amount of Land 4,292      
Carrying Amount of Buildings and Improvements 77,069      
Accumulated Depreciation [1] $ 9,676      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
Triple Net [Member] | Memphis, TN, MPS3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 5,963      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 940      
Carrying Amount of Buildings and Improvements 5,963      
Accumulated Depreciation [1] $ 2,327      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
Triple Net [Member] | Mendham, NJ, MDH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,240      
Initial Cost of Buildings & Improvements 27,169      
Cost Capitalized Subsequent to Acquisition 633      
Carrying Amount of Land 1,240      
Carrying Amount of Buildings and Improvements 27,802      
Accumulated Depreciation [1] $ 3,514      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Menomonee Falls, WI, MNE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,020      
Initial Cost of Buildings & Improvements 6,984      
Cost Capitalized Subsequent to Acquisition 1,652      
Carrying Amount of Land 1,020      
Carrying Amount of Buildings and Improvements 8,636      
Accumulated Depreciation [1] $ 1,602      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2011      
Triple Net [Member] | Mercerville, NJ, MCV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 860      
Initial Cost of Buildings & Improvements 9,929      
Cost Capitalized Subsequent to Acquisition 116      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 10,045      
Accumulated Depreciation [1] $ 1,411      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Meriden, CT, MEI2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 1,472      
Cost Capitalized Subsequent to Acquisition 5      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 1,477      
Accumulated Depreciation [1] $ 428      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Meridian, ID, MRD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,600      
Initial Cost of Buildings & Improvements 20,802      
Cost Capitalized Subsequent to Acquisition 251      
Carrying Amount of Land 3,600      
Carrying Amount of Buildings and Improvements 21,053      
Accumulated Depreciation [1] $ 7,193      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1978      
Triple Net [Member] | Merrillville, IN, MRV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 11,699      
Cost Capitalized Subsequent to Acquisition 154      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 11,853      
Accumulated Depreciation [1] $ 2,457      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1976      
Triple Net [Member] | Mesa, AZ, MES, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 5,913      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 9,087      
Cost Capitalized Subsequent to Acquisition 801      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 9,888      
Accumulated Depreciation [1] $ 4,076      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 2001      
Triple Net [Member] | Middleburg Heights, OH, MBH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 960      
Initial Cost of Buildings & Improvements 7,780      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 7,780      
Accumulated Depreciation [1] $ 2,366      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1999      
Triple Net [Member] | Middleton, WI, MID, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 420      
Initial Cost of Buildings & Improvements 4,006      
Cost Capitalized Subsequent to Acquisition 600      
Carrying Amount of Land 420      
Carrying Amount of Buildings and Improvements 4,606      
Accumulated Depreciation [1] $ 1,575      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1997      
Triple Net [Member] | Middletown, RI, MIT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,480      
Initial Cost of Buildings & Improvements 19,703      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,480      
Carrying Amount of Buildings and Improvements 19,703      
Accumulated Depreciation [1] $ 2,629      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2014      
Triple Net [Member] | Midland, MI, MLN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 11,025      
Cost Capitalized Subsequent to Acquisition 5,522      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 16,547      
Accumulated Depreciation [1] $ 1,681      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Milford, DE, MLF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 7,816      
Cost Capitalized Subsequent to Acquisition 39      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 7,855      
Accumulated Depreciation [1] $ 1,087      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
Triple Net [Member] | Milford, DE, MLF2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 680      
Initial Cost of Buildings & Improvements 19,216      
Cost Capitalized Subsequent to Acquisition 58      
Carrying Amount of Land 680      
Carrying Amount of Buildings and Improvements 19,274      
Accumulated Depreciation [1] $ 2,552      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Mill Creek, WA, MLC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 27,255      
Initial Cost of Land 10,150      
Initial Cost of Buildings & Improvements 60,274      
Cost Capitalized Subsequent to Acquisition 935      
Carrying Amount of Land 10,179      
Carrying Amount of Buildings and Improvements 61,179      
Accumulated Depreciation [1] $ 14,264      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2007      
Triple Net [Member] | Millville, NJ, MVL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 840      
Initial Cost of Buildings & Improvements 29,944      
Cost Capitalized Subsequent to Acquisition 104      
Carrying Amount of Land 840      
Carrying Amount of Buildings and Improvements 30,048      
Accumulated Depreciation [1] $ 3,891      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2010      
Triple Net [Member] | Milton Keynes, UKJ, MIK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,182      
Initial Cost of Buildings & Improvements 22,296      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,182      
Carrying Amount of Buildings and Improvements 22,296      
Accumulated Depreciation [1] $ 444      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1994      
Triple Net [Member] | Milwaukie, OR, MWK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 6,782      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 6,782      
Accumulated Depreciation [1] $ 117      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1995      
Triple Net [Member] | Mishawaka, IN, MSW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 740      
Initial Cost of Buildings & Improvements 16,114      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 740      
Carrying Amount of Buildings and Improvements 16,114      
Accumulated Depreciation [1] $ 557      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2001      
Triple Net [Member] | Missoula, MT, MSA, Senior Housing Triple Net [Member]        
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 377      
Carrying Amount of Land 550      
Carrying Amount of Buildings and Improvements 7,867      
Accumulated Depreciation [1] $ 2,151      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1987      
Triple Net [Member] | Monclova, OH, MNC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 11,868      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 11,868      
Accumulated Depreciation [1] $ 1,034      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Monmouth Junction, NJ, MMJ, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 6,209      
Cost Capitalized Subsequent to Acquisition 57      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 6,266      
Accumulated Depreciation [1] $ 929      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
Triple Net [Member] | Monroe, NC, MNR1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 470      
Initial Cost of Buildings & Improvements 3,681      
Cost Capitalized Subsequent to Acquisition 648      
Carrying Amount of Land 470      
Carrying Amount of Buildings and Improvements 4,329      
Accumulated Depreciation [1] $ 1,549      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2009      
Triple Net [Member] | Monroe, NC, MNR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 4,799      
Cost Capitalized Subsequent to Acquisition 857      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 5,656      
Accumulated Depreciation [1] $ 1,911      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1951      
Triple Net [Member] | Monroe, NC, MNR3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 450      
Initial Cost of Buildings & Improvements 4,021      
Cost Capitalized Subsequent to Acquisition 114      
Carrying Amount of Land 450      
Carrying Amount of Buildings and Improvements 4,135      
Accumulated Depreciation [1] $ 1,478      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
Triple Net [Member] | Monroe, WA, MON, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,560      
Initial Cost of Buildings & Improvements 34,460      
Cost Capitalized Subsequent to Acquisition 519      
Carrying Amount of Land 2,584      
Carrying Amount of Buildings and Improvements 34,955      
Accumulated Depreciation [1] $ 6,720      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
Triple Net [Member] | Monroe Township, NJ, MOT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,250      
Initial Cost of Buildings & Improvements 27,771      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,250      
Carrying Amount of Buildings and Improvements 27,771      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2012      
Triple Net [Member] | Monroe Twp, NJ, MOT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,160      
Initial Cost of Buildings & Improvements 13,193      
Cost Capitalized Subsequent to Acquisition 75      
Carrying Amount of Land 1,160      
Carrying Amount of Buildings and Improvements 13,268      
Accumulated Depreciation [1] $ 1,873      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
Triple Net [Member] | Monteagle, TN, MTE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 3,318      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 3,318      
Accumulated Depreciation [1] $ 1,401      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1965      
Triple Net [Member] | Monterey, TN, MRY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 4,195      
Cost Capitalized Subsequent to Acquisition 410      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,605      
Accumulated Depreciation [1] $ 3,324      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1980      
Triple Net [Member] | Montville, NJ, MNV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,500      
Initial Cost of Buildings & Improvements 31,002      
Cost Capitalized Subsequent to Acquisition 575      
Carrying Amount of Land 3,500      
Carrying Amount of Buildings and Improvements 31,577      
Accumulated Depreciation [1] $ 3,635      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Moorestown, NJ, MST, Senior Housing Triple Net [Member]        
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 1,134      
Carrying Amount of Land 2,065      
Carrying Amount of Buildings and Improvements 52,757      
Accumulated Depreciation [1] $ 6,768      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2012      
Triple Net [Member] | Moorestown, NJ, MST3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 6,400      
Initial Cost of Buildings & Improvements 23,875      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,400      
Carrying Amount of Buildings and Improvements 23,875      
Accumulated Depreciation [1] $ 1,119      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Morehead City, NC, MRH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 3,104      
Cost Capitalized Subsequent to Acquisition 1,648      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 4,752      
Accumulated Depreciation [1] $ 1,926      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1988      
Triple Net [Member] | Morgantown, KY, MGT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 380      
Initial Cost of Buildings & Improvements 3,705      
Cost Capitalized Subsequent to Acquisition 615      
Carrying Amount of Land 380      
Carrying Amount of Buildings and Improvements 4,320      
Accumulated Depreciation [1] $ 1,534      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1981      
Triple Net [Member] | Morgantown, WV, MGW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 15,633      
Cost Capitalized Subsequent to Acquisition 20      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 15,653      
Accumulated Depreciation [1] $ 1,664      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2010      
Triple Net [Member] | Morton Grove, IL, MOR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,900      
Initial Cost of Buildings & Improvements 19,374      
Cost Capitalized Subsequent to Acquisition 159      
Carrying Amount of Land 1,900      
Carrying Amount of Buildings and Improvements 19,533      
Accumulated Depreciation [1] $ 2,146      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
Triple Net [Member] | Mount Pleasant, SC, MPL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 17,200      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,052      
Carrying Amount of Buildings and Improvements 13,149      
Accumulated Depreciation [1] $ 1,304      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2008      
Triple Net [Member] | Mount Vernon, WA, MTV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,440      
Initial Cost of Buildings & Improvements 21,842      
Cost Capitalized Subsequent to Acquisition 1,623      
Carrying Amount of Land 3,440      
Carrying Amount of Buildings and Improvements 23,465      
Accumulated Depreciation [1] $ 689      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
Triple Net [Member] | Mountain City, TN, MTC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 220      
Initial Cost of Buildings & Improvements 5,896      
Cost Capitalized Subsequent to Acquisition 660      
Carrying Amount of Land 220      
Carrying Amount of Buildings and Improvements 6,556      
Accumulated Depreciation [1] $ 4,484      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1987      
Triple Net [Member] | Moyock, NC, MOY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 280      
Initial Cost of Buildings & Improvements 13,381      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 13,381      
Accumulated Depreciation [1] $ 428      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1976      
Triple Net [Member] | Mt. Vernon, WA, MTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 2,200      
Cost Capitalized Subsequent to Acquisition 156      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 2,356      
Accumulated Depreciation [1] $ 564      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
Triple Net [Member] | Murphy, TX, MPH, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 1,950      
Carrying Amount of Buildings and Improvements 19,182      
Accumulated Depreciation [1] $ 164      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1998      
Triple Net [Member] | Nacogdoches, TX, NAC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 390      
Initial Cost of Buildings & Improvements 5,754      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 5,754      
Accumulated Depreciation [1] $ 1,325      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1988      
Triple Net [Member] | Naperville, IL, NPR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,470      
Initial Cost of Buildings & Improvements 29,547      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,470      
Carrying Amount of Buildings and Improvements 29,547      
Accumulated Depreciation [1] $ 3,886      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2004      
Triple Net [Member] | Naples, FL, NPL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,716      
Initial Cost of Buildings & Improvements 17,306      
Cost Capitalized Subsequent to Acquisition 2,075      
Carrying Amount of Land 1,738      
Carrying Amount of Buildings and Improvements 19,358      
Accumulated Depreciation [1] $ 16,781      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 2013      
Triple Net [Member] | Naples, FL, NPL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 550      
Initial Cost of Buildings & Improvements 5,450      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 550      
Carrying Amount of Buildings and Improvements 5,450      
Accumulated Depreciation [1] $ 1,866      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1999      
Triple Net [Member] | Nashville, TN, NSV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,910      
Initial Cost of Buildings & Improvements 29,590      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,910      
Carrying Amount of Buildings and Improvements 29,590      
Accumulated Depreciation [1] $ 5,944      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2002      
Triple Net [Member] | Nashville, TN, NSV4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,500      
Initial Cost of Buildings & Improvements 12,287      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,500      
Carrying Amount of Buildings and Improvements 12,287      
Accumulated Depreciation [1] $ 1,008      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Naugatuck, CT, NAU, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 15,826      
Cost Capitalized Subsequent to Acquisition 176      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 16,002      
Accumulated Depreciation [1] $ 2,127      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
Triple Net [Member] | Needham, MA, NED, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,610      
Initial Cost of Buildings & Improvements 13,715      
Cost Capitalized Subsequent to Acquisition 366      
Carrying Amount of Land 1,610      
Carrying Amount of Buildings and Improvements 14,081      
Accumulated Depreciation [1] $ 5,791      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2011      
Triple Net [Member] | Neodesha, KS, NDS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 20      
Initial Cost of Buildings & Improvements 430      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 20      
Carrying Amount of Buildings and Improvements 430      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
Triple Net [Member] | New Braunfels, TX, NBR, Senior Housing Triple Net [Member]        
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 9,397      
Carrying Amount of Land 2,729      
Carrying Amount of Buildings and Improvements 27,668      
Accumulated Depreciation [1] $ 2,633      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
Triple Net [Member] | New Haven, IN, NHV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 176      
Initial Cost of Buildings & Improvements 3,524      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 176      
Carrying Amount of Buildings and Improvements 3,524      
Accumulated Depreciation [1] $ 1,434      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1995      
Triple Net [Member] | New Moston, UKD, NMT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,770      
Initial Cost of Buildings & Improvements 5,233      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 5,233      
Accumulated Depreciation [1] $ 349      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1999      
Triple Net [Member] | Newark, DE, NWK, Senior Housing Triple Net [Member]        
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 1,488      
Carrying Amount of Land 560      
Carrying Amount of Buildings and Improvements 22,708      
Accumulated Depreciation [1] $ 6,364      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1997      
Triple Net [Member] | Newcastle Under Lyme, UKG, NCL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,327      
Initial Cost of Buildings & Improvements 6,760      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,327      
Carrying Amount of Buildings and Improvements 6,760      
Accumulated Depreciation [1] $ 430      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2014      
Triple Net [Member] | Newcastle-under-Lyme, UKG, NCL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,345      
Initial Cost of Buildings & Improvements 6,618      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,345      
Carrying Amount of Buildings and Improvements 6,618      
Accumulated Depreciation [1] $ 194      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Newport, VT, NEP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 3,867      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 3,867      
Accumulated Depreciation [1] $ 572      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Norman, OK, NRM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 55      
Initial Cost of Buildings & Improvements 1,484      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 55      
Carrying Amount of Buildings and Improvements 1,484      
Accumulated Depreciation [1] $ 844      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 1998      
Triple Net [Member] | Norman, OK, NRM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,480      
Initial Cost of Buildings & Improvements 33,330      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,480      
Carrying Amount of Buildings and Improvements 33,330      
Accumulated Depreciation [1] $ 3,001      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2011      
Triple Net [Member] | Norristown, PA, NRS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 19,488      
Cost Capitalized Subsequent to Acquisition 1,762      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 21,250      
Accumulated Depreciation [1] $ 2,682      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | North Andover, MA, NAN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 21,817      
Cost Capitalized Subsequent to Acquisition 53      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 21,870      
Accumulated Depreciation [1] $ 2,842      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | North Andover, MA, NAN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,070      
Initial Cost of Buildings & Improvements 17,341      
Cost Capitalized Subsequent to Acquisition 1,303      
Carrying Amount of Land 1,070      
Carrying Amount of Buildings and Improvements 18,644      
Accumulated Depreciation [1] $ 2,452      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | North Augusta, SC, NAG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 332      
Initial Cost of Buildings & Improvements 2,558      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 332      
Carrying Amount of Buildings and Improvements 2,558      
Accumulated Depreciation [1] $ 1,169      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1994      
Triple Net [Member] | North Bend, OR, NBD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,290      
Initial Cost of Buildings & Improvements 7,361      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,290      
Carrying Amount of Buildings and Improvements 7,361      
Accumulated Depreciation [1] $ 129      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1991      
Triple Net [Member] | North Cape May, NJ, NCM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 22,266      
Cost Capitalized Subsequent to Acquisition 36      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 22,302      
Accumulated Depreciation [1] $ 2,882      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1981      
Triple Net [Member] | North Cape May, NJ, NCM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 630      
Initial Cost of Buildings & Improvements 13,556      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 630      
Carrying Amount of Buildings and Improvements 13,556      
Accumulated Depreciation [1] $ 157      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | North Cape May, NJ, NCM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 77      
Initial Cost of Buildings & Improvements 151      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 77      
Carrying Amount of Buildings and Improvements 151      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1990      
Triple Net [Member] | Northampton, UKF, NHT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 6,193      
Initial Cost of Buildings & Improvements 20,736      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 6,193      
Carrying Amount of Buildings and Improvements 20,736      
Accumulated Depreciation [1] $ 1,373      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2001      
Triple Net [Member] | Northampton, UKF, NHT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,407      
Initial Cost of Buildings & Improvements 7,479      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,407      
Carrying Amount of Buildings and Improvements 7,479      
Accumulated Depreciation [1] $ 288      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | Nuneaton, UKG, NNT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,974      
Initial Cost of Buildings & Improvements 10,737      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,974      
Carrying Amount of Buildings and Improvements 10,737      
Accumulated Depreciation [1] $ 684      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2007      
Triple Net [Member] | Nuthall, UKF, NTG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,946      
Initial Cost of Buildings & Improvements 7,486      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,946      
Carrying Amount of Buildings and Improvements 7,486      
Accumulated Depreciation [1] $ 256      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1991      
Triple Net [Member] | Nuthall, UKF, NUT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,986      
Initial Cost of Buildings & Improvements 12,474      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,986      
Carrying Amount of Buildings and Improvements 12,474      
Accumulated Depreciation [1] $ 803      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1900      
Triple Net [Member] | Oak Hill, WV, OKH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 240      
Initial Cost of Buildings & Improvements 24,506      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 240      
Carrying Amount of Buildings and Improvements 24,506      
Accumulated Depreciation [1] $ 3,068      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Oak Hill, WV, OKH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 170      
Initial Cost of Buildings & Improvements 721      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 170      
Carrying Amount of Buildings and Improvements 721      
Accumulated Depreciation [1] $ 198      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Oakland, CA, OAK2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,760      
Initial Cost of Buildings & Improvements 16,143      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,760      
Carrying Amount of Buildings and Improvements 16,143      
Accumulated Depreciation [1] $ 639      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1994      
Triple Net [Member] | Ocala, FL, OCA2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,340      
Initial Cost of Buildings & Improvements 10,564      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,340      
Carrying Amount of Buildings and Improvements 10,564      
Accumulated Depreciation [1] $ 1,870      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1988      
Triple Net [Member] | Ogden, UT, OGD, Senior Housing Triple Net [Member]        
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 699      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 7,399      
Accumulated Depreciation [1] $ 2,135      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2014      
Triple Net [Member] | Oklahoma City, OK, OKL4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 590      
Initial Cost of Buildings & Improvements 7,513      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 7,513      
Accumulated Depreciation [1] $ 1,554      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2007      
Triple Net [Member] | Oklahoma City, OK, OKL5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 760      
Initial Cost of Buildings & Improvements 7,017      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 760      
Carrying Amount of Buildings and Improvements 7,017      
Accumulated Depreciation [1] $ 1,380      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1979      
Triple Net [Member] | Olds, AB, OLD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 222      
Initial Cost of Buildings & Improvements 7,688      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 222      
Carrying Amount of Buildings and Improvements 7,688      
Accumulated Depreciation [1] $ 219      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2005      
Triple Net [Member] | Olds, AB, OLD2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 580      
Initial Cost of Buildings & Improvements 13,142      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 580      
Carrying Amount of Buildings and Improvements 13,142      
Accumulated Depreciation [1] $ 259      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1989      
Triple Net [Member] | Olympia, WA, OLM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 6,397      
Initial Cost of Land 550      
Initial Cost of Buildings & Improvements 16,689      
Cost Capitalized Subsequent to Acquisition 298      
Carrying Amount of Land 553      
Carrying Amount of Buildings and Improvements 16,984      
Accumulated Depreciation [1] $ 3,266      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
Triple Net [Member] | Omaha, NE, OMH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 370      
Initial Cost of Buildings & Improvements 10,230      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 370      
Carrying Amount of Buildings and Improvements 10,230      
Accumulated Depreciation [1] $ 1,550      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2006      
Triple Net [Member] | Omaha, NE, OMH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 380      
Initial Cost of Buildings & Improvements 8,864      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 380      
Carrying Amount of Buildings and Improvements 8,864      
Accumulated Depreciation [1] $ 1,399      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
Triple Net [Member] | Ona, WV, ONA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 15,998      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 15,998      
Accumulated Depreciation [1] $ 140      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2009      
Triple Net [Member] | Oneonta, NY, OTA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 80      
Initial Cost of Buildings & Improvements 5,020      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 80      
Carrying Amount of Buildings and Improvements 5,020      
Accumulated Depreciation [1] $ 1,061      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1999      
Triple Net [Member] | Orem, UT, ORE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,150      
Initial Cost of Buildings & Improvements 24,107      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,150      
Carrying Amount of Buildings and Improvements 24,107      
Accumulated Depreciation [1] $ 157      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1995      
Triple Net [Member] | Ormond Beach, FL, ORM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 2,739      
Cost Capitalized Subsequent to Acquisition 452      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 3,191      
Accumulated Depreciation [1] $ 1,941      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1993      
Triple Net [Member] | Orwigsburg, PA, ORW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 650      
Initial Cost of Buildings & Improvements 20,632      
Cost Capitalized Subsequent to Acquisition 134      
Carrying Amount of Land 650      
Carrying Amount of Buildings and Improvements 20,766      
Accumulated Depreciation [1] $ 2,715      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Osage City, KS, OCY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 50      
Initial Cost of Buildings & Improvements 1,700      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 50      
Carrying Amount of Buildings and Improvements 1,700      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | Osawatomie, KS, OWT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 130      
Initial Cost of Buildings & Improvements 2,970      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 130      
Carrying Amount of Buildings and Improvements 2,970      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1997      
Triple Net [Member] | Ottawa, KS, OWA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 160      
Initial Cost of Buildings & Improvements 6,590      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 160      
Carrying Amount of Buildings and Improvements 6,590      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1965      
Triple Net [Member] | Overland Park, KS, OVP2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,730      
Initial Cost of Buildings & Improvements 27,076      
Cost Capitalized Subsequent to Acquisition 340      
Carrying Amount of Land 3,730      
Carrying Amount of Buildings and Improvements 27,416      
Accumulated Depreciation [1] $ 4,641      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1997      
Triple Net [Member] | Overland Park, KS, OVP3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,500      
Initial Cost of Buildings & Improvements 29,105      
Cost Capitalized Subsequent to Acquisition 7,295      
Carrying Amount of Land 4,500      
Carrying Amount of Buildings and Improvements 36,400      
Accumulated Depreciation [1] $ 5,210      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1986      
Triple Net [Member] | Overland Park, KS, OVP5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 410      
Initial Cost of Buildings & Improvements 2,840      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 2,840      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1952      
Triple Net [Member] | Owasso, OK, OWS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 215      
Initial Cost of Buildings & Improvements 1,380      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 215      
Carrying Amount of Buildings and Improvements 1,380      
Accumulated Depreciation [1] $ 705      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 2000      
Triple Net [Member] | Owensboro, KY, OWN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 240      
Initial Cost of Buildings & Improvements 6,760      
Cost Capitalized Subsequent to Acquisition 609      
Carrying Amount of Land 240      
Carrying Amount of Buildings and Improvements 7,369      
Accumulated Depreciation [1] $ 2,160      
Year Acquired Jan. 01, 1993      
Year Built Jan. 01, 1972      
Triple Net [Member] | Owensboro, KY, OWN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 225      
Initial Cost of Buildings & Improvements 13,275      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 225      
Carrying Amount of Buildings and Improvements 13,275      
Accumulated Depreciation [1] $ 4,076      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2008      
Triple Net [Member] | Owenton, KY, ONT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 100      
Initial Cost of Buildings & Improvements 2,400      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 100      
Carrying Amount of Buildings and Improvements 2,400      
Accumulated Depreciation [1] $ 906      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1968      
Triple Net [Member] | Oxford, MI, OXF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 11,038      
Initial Cost of Land 1,430      
Initial Cost of Buildings & Improvements 15,791      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,430      
Carrying Amount of Buildings and Improvements 15,791      
Accumulated Depreciation [1] $ 2,266      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1979      
Triple Net [Member] | Palestine, TX, PLS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 180      
Initial Cost of Buildings & Improvements 4,320      
Cost Capitalized Subsequent to Acquisition 1,300      
Carrying Amount of Land 180      
Carrying Amount of Buildings and Improvements 5,620      
Accumulated Depreciation [1] $ 1,357      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2010      
Triple Net [Member] | Palm Coast, FL, PLM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 870      
Initial Cost of Buildings & Improvements 10,957      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 870      
Carrying Amount of Buildings and Improvements 10,957      
Accumulated Depreciation [1] $ 1,804      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1998      
Triple Net [Member] | Paola, KS, POL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 5,610      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 5,610      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1900      
Triple Net [Member] | Paris, TX, PAR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 490      
Initial Cost of Buildings & Improvements 5,452      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 490      
Carrying Amount of Buildings and Improvements 5,452      
Accumulated Depreciation [1] $ 3,331      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1972      
Triple Net [Member] | Parkersburg, WV, PKB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 390      
Initial Cost of Buildings & Improvements 21,288      
Cost Capitalized Subsequent to Acquisition 643      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 21,931      
Accumulated Depreciation [1] $ 2,775      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2010      
Triple Net [Member] | Parkville, MD, PRK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 16,071      
Cost Capitalized Subsequent to Acquisition 274      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 16,345      
Accumulated Depreciation [1] $ 2,192      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Parkville, MD, PRK2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 791      
Initial Cost of Buildings & Improvements 11,186      
Cost Capitalized Subsequent to Acquisition 3      
Carrying Amount of Land 791      
Carrying Amount of Buildings and Improvements 11,189      
Accumulated Depreciation [1] $ 1,549      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
Triple Net [Member] | Parkville, MD, PRK3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,100      
Initial Cost of Buildings & Improvements 11,768      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,100      
Carrying Amount of Buildings and Improvements 11,768      
Accumulated Depreciation [1] $ 1,612      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2008      
Triple Net [Member] | Paso Robles, CA, PSR, Senior Housing Triple Net [Member]        
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 693      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 9,323      
Accumulated Depreciation [1] $ 3,370      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1997      
Triple Net [Member] | Passaic, NJ, PSS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,750      
Initial Cost of Buildings & Improvements 9,982      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,750      
Carrying Amount of Buildings and Improvements 9,982      
Accumulated Depreciation [1] $ 26      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1998      
Triple Net [Member] | Pella, IA, PLL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 870      
Initial Cost of Buildings & Improvements 6,716      
Cost Capitalized Subsequent to Acquisition 89      
Carrying Amount of Land 870      
Carrying Amount of Buildings and Improvements 6,805      
Accumulated Depreciation [1] $ 596      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1972      
Triple Net [Member] | Pennington, NJ, PNG, Senior Housing Triple Net [Member]        
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 752      
Carrying Amount of Land 1,465      
Carrying Amount of Buildings and Improvements 28,287      
Accumulated Depreciation [1] $ 3,162      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Pennsauken, NJ, PSK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 10,780      
Cost Capitalized Subsequent to Acquisition 179      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 10,959      
Accumulated Depreciation [1] $ 1,645      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Petoskey, MI, PET, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 860      
Initial Cost of Buildings & Improvements 14,452      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 14,452      
Accumulated Depreciation [1] $ 1,946      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Triple Net [Member] | Pewaukee, WI, WAU, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,700      
Initial Cost of Buildings & Improvements 20,669      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,700      
Carrying Amount of Buildings and Improvements 20,669      
Accumulated Depreciation [1] $ 6,100      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1985      
Triple Net [Member] | Philadelphia, PA, PHL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,700      
Initial Cost of Buildings & Improvements 25,709      
Cost Capitalized Subsequent to Acquisition 332      
Carrying Amount of Land 2,700      
Carrying Amount of Buildings and Improvements 26,041      
Accumulated Depreciation [1] $ 3,432      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1905      
Triple Net [Member] | Philadelphia, PA, PHL3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,930      
Initial Cost of Buildings & Improvements 10,433      
Cost Capitalized Subsequent to Acquisition 3,373      
Carrying Amount of Land 2,930      
Carrying Amount of Buildings and Improvements 13,806      
Accumulated Depreciation [1] $ 1,899      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Triple Net [Member] | Philadelphia, PA, PHL4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 540      
Initial Cost of Buildings & Improvements 11,239      
Cost Capitalized Subsequent to Acquisition 65      
Carrying Amount of Land 540      
Carrying Amount of Buildings and Improvements 11,304      
Accumulated Depreciation [1] $ 1,446      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1963      
Triple Net [Member] | Philadelphia, PA, PHL5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,810      
Initial Cost of Buildings & Improvements 16,898      
Cost Capitalized Subsequent to Acquisition 33      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 16,931      
Accumulated Depreciation [1] $ 2,467      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Phillipsburg, NJ, PLP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 21,175      
Cost Capitalized Subsequent to Acquisition 193      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 21,368      
Accumulated Depreciation [1] $ 2,843      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1982      
Triple Net [Member] | Phillipsburg, NJ, PLP2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 8,114      
Cost Capitalized Subsequent to Acquisition 37      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 8,151      
Accumulated Depreciation [1] $ 1,084      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
Triple Net [Member] | Pigeon Forge, TN, PGN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 320      
Initial Cost of Buildings & Improvements 4,180      
Cost Capitalized Subsequent to Acquisition 117      
Carrying Amount of Land 320      
Carrying Amount of Buildings and Improvements 4,297      
Accumulated Depreciation [1] $ 1,833      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1992      
Triple Net [Member] | Pinehurst, NC, PNH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 2,690      
Cost Capitalized Subsequent to Acquisition 484      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 3,174      
Accumulated Depreciation [1] $ 1,176      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1990      
Triple Net [Member] | Piqua, OH, PIQ, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 204      
Initial Cost of Buildings & Improvements 1,885      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 204      
Carrying Amount of Buildings and Improvements 1,885      
Accumulated Depreciation [1] $ 889      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1998      
Triple Net [Member] | Pittsburgh, PA, PTS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 8,572      
Cost Capitalized Subsequent to Acquisition 115      
Carrying Amount of Land 1,750      
Carrying Amount of Buildings and Improvements 8,687      
Accumulated Depreciation [1] $ 2,636      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1998      
Triple Net [Member] | Plainview, NY, PLV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,990      
Initial Cost of Buildings & Improvements 11,969      
Cost Capitalized Subsequent to Acquisition 560      
Carrying Amount of Land 3,990      
Carrying Amount of Buildings and Improvements 12,529      
Accumulated Depreciation [1] $ 1,581      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Plattsmouth, NE, PLA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 250      
Initial Cost of Buildings & Improvements 5,650      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 250      
Carrying Amount of Buildings and Improvements 5,650      
Accumulated Depreciation [1] $ 900      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Plymouth, MI, PLH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,490      
Initial Cost of Buildings & Improvements 19,990      
Cost Capitalized Subsequent to Acquisition 129      
Carrying Amount of Land 1,490      
Carrying Amount of Buildings and Improvements 20,119      
Accumulated Depreciation [1] $ 2,742      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1980      
Triple Net [Member] | Ponoka, AB, PON, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 3,647      
Initial Cost of Land 418      
Initial Cost of Buildings & Improvements 10,831      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 418      
Carrying Amount of Buildings and Improvements 10,831      
Accumulated Depreciation [1] $ 309      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2005      
Triple Net [Member] | Port St. Joe, FL, PSJ, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 370      
Initial Cost of Buildings & Improvements 2,055      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 370      
Carrying Amount of Buildings and Improvements 2,055      
Accumulated Depreciation [1] $ 1,159      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2001      
Triple Net [Member] | Port St. Lucie, FL, PSL, Senior Housing Triple Net [Member]        
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 6,090      
Carrying Amount of Land 8,700      
Carrying Amount of Buildings and Improvements 53,320      
Accumulated Depreciation [1] $ 7,859      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1986      
Triple Net [Member] | Post Falls, ID, PSF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,700      
Initial Cost of Buildings & Improvements 14,217      
Cost Capitalized Subsequent to Acquisition 2,181      
Carrying Amount of Land 2,700      
Carrying Amount of Buildings and Improvements 16,398      
Accumulated Depreciation [1] $ 3,233      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1994      
Triple Net [Member] | Pottsville, PA, PTV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 26,964      
Cost Capitalized Subsequent to Acquisition 202      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 27,166      
Accumulated Depreciation [1] $ 3,589      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1956      
Triple Net [Member] | Princeton, NJ, PRI, Senior Housing Triple Net [Member]        
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 1,397      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 32,205      
Accumulated Depreciation [1] $ 3,662      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Triple Net [Member] | Prior Lake, MN, PLK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 14,250      
Initial Cost of Land 1,870      
Initial Cost of Buildings & Improvements 29,849      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,870      
Carrying Amount of Buildings and Improvements 29,849      
Accumulated Depreciation [1] $ 128      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1972      
Triple Net [Member] | Puyallup, WA, PYL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 11,136      
Initial Cost of Land 1,150      
Initial Cost of Buildings & Improvements 20,776      
Cost Capitalized Subsequent to Acquisition 445      
Carrying Amount of Land 1,156      
Carrying Amount of Buildings and Improvements 21,216      
Accumulated Depreciation [1] $ 4,180      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2004      
Triple Net [Member] | Quakertown, PA, QKT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,040      
Initial Cost of Buildings & Improvements 25,389      
Cost Capitalized Subsequent to Acquisition 72      
Carrying Amount of Land 1,040      
Carrying Amount of Buildings and Improvements 25,461      
Accumulated Depreciation [1] $ 3,291      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Raleigh, NC, RLH3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 24,091      
Initial Cost of Land 3,530      
Initial Cost of Buildings & Improvements 59,589      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,530      
Carrying Amount of Buildings and Improvements 59,589      
Accumulated Depreciation [1] $ 5,110      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2004      
Triple Net [Member] | Raleigh, NC, RLH4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,580      
Initial Cost of Buildings & Improvements 16,837      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,580      
Carrying Amount of Buildings and Improvements 16,837      
Accumulated Depreciation [1] $ 1,561      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2000      
Triple Net [Member] | Reading, PA, REA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 980      
Initial Cost of Buildings & Improvements 19,906      
Cost Capitalized Subsequent to Acquisition 102      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 20,008      
Accumulated Depreciation [1] $ 2,627      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2007      
Triple Net [Member] | Red Bank, NJ, RDB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 21,275      
Cost Capitalized Subsequent to Acquisition 390      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 21,665      
Accumulated Depreciation [1] $ 2,445      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
Triple Net [Member] | Rehoboth Beach, DE, RHB, Senior Housing Triple Net [Member]        
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 8,562      
Carrying Amount of Land 973      
Carrying Amount of Buildings and Improvements 32,796      
Accumulated Depreciation [1] $ 3,420      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2010      
Triple Net [Member] | Reidsville, NC, RDS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 170      
Initial Cost of Buildings & Improvements 3,830      
Cost Capitalized Subsequent to Acquisition 857      
Carrying Amount of Land 170      
Carrying Amount of Buildings and Improvements 4,687      
Accumulated Depreciation [1] $ 1,715      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1900      
Triple Net [Member] | Reno, NV, RNO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,060      
Initial Cost of Buildings & Improvements 11,440      
Cost Capitalized Subsequent to Acquisition 605      
Carrying Amount of Land 1,060      
Carrying Amount of Buildings and Improvements 12,045      
Accumulated Depreciation [1] $ 3,541      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1999      
Triple Net [Member] | Richardson, TX, RCR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 16,562      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 16,562      
Accumulated Depreciation [1] $ 303      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1980      
Triple Net [Member] | Richmond, VA, RMD3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 12,000      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 250      
Carrying Amount of Buildings and Improvements 11,750      
Accumulated Depreciation [1] $ 835      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1900      
Triple Net [Member] | Ridgeland, MS, RGE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 520      
Initial Cost of Buildings & Improvements 7,675      
Cost Capitalized Subsequent to Acquisition 427      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 8,102      
Accumulated Depreciation [1] $ 2,575      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2004      
Triple Net [Member] | Ridgely, TN, RDG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 5,700      
Cost Capitalized Subsequent to Acquisition 97      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 5,797      
Accumulated Depreciation [1] $ 2,308      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1970      
Triple Net [Member] | Ridgewood, NJ, RDW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 16,170      
Cost Capitalized Subsequent to Acquisition 480      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 16,650      
Accumulated Depreciation [1] $ 2,139      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Rochdale, MA, RCD2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 7,100      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 690      
Carrying Amount of Buildings and Improvements 6,410      
Accumulated Depreciation [1] $ 444      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2004      
Triple Net [Member] | Rockledge, FL, RLD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 360      
Initial Cost of Buildings & Improvements 4,117      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 4,117      
Accumulated Depreciation [1] $ 1,953      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1997      
Triple Net [Member] | Rockville, MD, RCV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 16,398      
Cost Capitalized Subsequent to Acquisition 10      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 16,408      
Accumulated Depreciation [1] $ 1,716      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Rockville, CT, RKV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,500      
Initial Cost of Buildings & Improvements 4,835      
Cost Capitalized Subsequent to Acquisition 76      
Carrying Amount of Land 1,500      
Carrying Amount of Buildings and Improvements 4,911      
Accumulated Depreciation [1] $ 872      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1979      
Triple Net [Member] | Rockville Centre, NY, RVC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,290      
Initial Cost of Buildings & Improvements 20,310      
Cost Capitalized Subsequent to Acquisition 569      
Carrying Amount of Land 4,290      
Carrying Amount of Buildings and Improvements 20,879      
Accumulated Depreciation [1] $ 2,481      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
Triple Net [Member] | Rockwall, TX, RKW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 19,693      
Carrying Amount of Land 2,220      
Carrying Amount of Buildings and Improvements 17,473      
Accumulated Depreciation [1] $ 225      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Rockwood, TN, RWD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 500      
Initial Cost of Buildings & Improvements 7,116      
Cost Capitalized Subsequent to Acquisition 741      
Carrying Amount of Land 500      
Carrying Amount of Buildings and Improvements 7,857      
Accumulated Depreciation [1] $ 3,091      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1995      
Triple Net [Member] | Rocky Hill, CT, RKH2, Senior Housing Triple Net [Member]        
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 1,500      
Carrying Amount of Land 1,090      
Carrying Amount of Buildings and Improvements 8,210      
Accumulated Depreciation [1] $ 2,491      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1968      
Triple Net [Member] | Rogersville, TN, RGV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 350      
Initial Cost of Buildings & Improvements 3,278      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 350      
Carrying Amount of Buildings and Improvements 3,278      
Accumulated Depreciation [1] $ 1,388      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1989      
Triple Net [Member] | Rohnert Park, CA, ROP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,265      
Initial Cost of Land 6,500      
Initial Cost of Buildings & Improvements 18,700      
Cost Capitalized Subsequent to Acquisition 2,116      
Carrying Amount of Land 6,546      
Carrying Amount of Buildings and Improvements 20,769      
Accumulated Depreciation [1] $ 5,712      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2005      
Triple Net [Member] | Romeoville, IL, RMV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,895      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,895      
Carrying Amount of Buildings and Improvements 0      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1997      
Triple Net [Member] | Roseburg, OR, RSB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,200      
Initial Cost of Buildings & Improvements 4,891      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 4,891      
Accumulated Depreciation [1] $ 85      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2004      
Triple Net [Member] | Roseville, MN, RSV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,140      
Initial Cost of Buildings & Improvements 24,679      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,140      
Carrying Amount of Buildings and Improvements 24,679      
Accumulated Depreciation [1] $ 107      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1993      
Triple Net [Member] | Roswell, GA, RWL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 7,628      
Initial Cost of Land 1,107      
Initial Cost of Buildings & Improvements 9,627      
Cost Capitalized Subsequent to Acquisition 1,086      
Carrying Amount of Land 1,114      
Carrying Amount of Buildings and Improvements 10,706      
Accumulated Depreciation [1] $ 7,536      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 2005      
Triple Net [Member] | Rugeley, UKG, RUG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,271      
Initial Cost of Buildings & Improvements 12,266      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,271      
Carrying Amount of Buildings and Improvements 12,266      
Accumulated Depreciation [1] $ 827      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1961      
Triple Net [Member] | Ruston, LA, RST2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 710      
Initial Cost of Buildings & Improvements 9,790      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 710      
Carrying Amount of Buildings and Improvements 9,790      
Accumulated Depreciation [1] $ 1,261      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2014      
Triple Net [Member] | Rutland, VT, RUT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,190      
Initial Cost of Buildings & Improvements 23,655      
Cost Capitalized Subsequent to Acquisition 88      
Carrying Amount of Land 1,190      
Carrying Amount of Buildings and Improvements 23,743      
Accumulated Depreciation [1] $ 3,125      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Sacramento, CA, SAC2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,948      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 14,781      
Cost Capitalized Subsequent to Acquisition 251      
Carrying Amount of Land 952      
Carrying Amount of Buildings and Improvements 15,020      
Accumulated Depreciation [1] $ 2,963      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Salem, OR, SLM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 449      
Initial Cost of Buildings & Improvements 5,171      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 449      
Carrying Amount of Buildings and Improvements 5,172      
Accumulated Depreciation [1] $ 2,342      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1988      
Triple Net [Member] | Salem, OR, SLM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 440      
Initial Cost of Buildings & Improvements 4,726      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 4,726      
Accumulated Depreciation [1] $ 83      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1987      
Triple Net [Member] | Salisbury, NC, SBY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 370      
Initial Cost of Buildings & Improvements 5,697      
Cost Capitalized Subsequent to Acquisition 168      
Carrying Amount of Land 370      
Carrying Amount of Buildings and Improvements 5,865      
Accumulated Depreciation [1] $ 2,006      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2005      
Triple Net [Member] | San Angelo, TX, SAO, Senior Housing Triple Net [Member]        
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 425      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 9,225      
Accumulated Depreciation [1] $ 2,658      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2004      
Triple Net [Member] | San Angelo, TX, SAO2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 24,689      
Cost Capitalized Subsequent to Acquisition 16      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 24,705      
Accumulated Depreciation [1] $ 986      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1992      
Triple Net [Member] | San Antonio, TX, SNN11, Senior Housing Triple Net [Member]        
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 2,124      
Carrying Amount of Land 6,120      
Carrying Amount of Buildings and Improvements 30,293      
Accumulated Depreciation [1] $ 3,514      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | San Antonio, TX, SNN9, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 17,303      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 17,303      
Accumulated Depreciation [1] $ 5,758      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1990      
Triple Net [Member] | San Bernardino, CA, SBN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 14,300      
Cost Capitalized Subsequent to Acquisition 687      
Carrying Amount of Land 3,700      
Carrying Amount of Buildings and Improvements 14,987      
Accumulated Depreciation [1] $ 2,741      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2000      
Triple Net [Member] | San Diego, CA, SDG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 22,003      
Cost Capitalized Subsequent to Acquisition 1,845      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 23,848      
Accumulated Depreciation [1] $ 4,279      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1964      
Triple Net [Member] | San Ramon, CA, SAR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,531      
Initial Cost of Land 2,430      
Initial Cost of Buildings & Improvements 17,488      
Cost Capitalized Subsequent to Acquisition 60      
Carrying Amount of Land 2,435      
Carrying Amount of Buildings and Improvements 17,543      
Accumulated Depreciation [1] $ 3,354      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
Triple Net [Member] | Sanatoga, PA, SAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 980      
Initial Cost of Buildings & Improvements 30,695      
Cost Capitalized Subsequent to Acquisition 38      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 30,733      
Accumulated Depreciation [1] $ 3,903      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Sand Springs, OK, SSG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 6,530      
Initial Cost of Land 910      
Initial Cost of Buildings & Improvements 19,654      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 910      
Carrying Amount of Buildings and Improvements 19,654      
Accumulated Depreciation [1] $ 1,803      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2010      
Triple Net [Member] | Sarasota, FL, SRS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 475      
Initial Cost of Buildings & Improvements 3,175      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 475      
Carrying Amount of Buildings and Improvements 3,175      
Accumulated Depreciation [1] $ 1,695      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 2001      
Triple Net [Member] | Sarasota, FL, SRS4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 3,400      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 3,400      
Accumulated Depreciation [1] $ 1,298      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1996      
Triple Net [Member] | Sarasota, FL, SRS5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,360      
Initial Cost of Buildings & Improvements 19,140      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,360      
Carrying Amount of Buildings and Improvements 19,140      
Accumulated Depreciation [1] $ 2,175      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
Triple Net [Member] | Sarasota, FL, SRS6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,120      
Initial Cost of Buildings & Improvements 12,489      
Cost Capitalized Subsequent to Acquisition 106      
Carrying Amount of Land 1,120      
Carrying Amount of Buildings and Improvements 12,595      
Accumulated Depreciation [1] $ 1,144      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2006      
Triple Net [Member] | Sarasota, FL, SRS7, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 8,825      
Cost Capitalized Subsequent to Acquisition 535      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 9,360      
Accumulated Depreciation [1] $ 827      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
Triple Net [Member] | Sarasota, FL, SRS8, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 9,854      
Cost Capitalized Subsequent to Acquisition 182      
Carrying Amount of Land 880      
Carrying Amount of Buildings and Improvements 10,036      
Accumulated Depreciation [1] $ 946      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1990      
Triple Net [Member] | Scott Depot, WV, SCD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 350      
Initial Cost of Buildings & Improvements 6,876      
Cost Capitalized Subsequent to Acquisition 58      
Carrying Amount of Land 350      
Carrying Amount of Buildings and Improvements 6,934      
Accumulated Depreciation [1] $ 956      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1995      
Triple Net [Member] | Scranton, PA, SCN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 440      
Initial Cost of Buildings & Improvements 17,609      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 17,609      
Accumulated Depreciation [1] $ 557      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1977      
Triple Net [Member] | Scranton, PA, SCN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 320      
Initial Cost of Buildings & Improvements 12,144      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 320      
Carrying Amount of Buildings and Improvements 12,144      
Accumulated Depreciation [1] $ 381      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1992      
Triple Net [Member] | Seaford, DE, SEF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 720      
Initial Cost of Buildings & Improvements 14,029      
Cost Capitalized Subsequent to Acquisition 53      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 14,082      
Accumulated Depreciation [1] $ 1,949      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Seaford, DE, SEF2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 830      
Initial Cost of Buildings & Improvements 7,995      
Cost Capitalized Subsequent to Acquisition 1,547      
Carrying Amount of Land 830      
Carrying Amount of Buildings and Improvements 9,542      
Accumulated Depreciation [1] $ 887      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2005      
Triple Net [Member] | Seattle, WA, SEA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 7,456      
Initial Cost of Land 5,190      
Initial Cost of Buildings & Improvements 9,350      
Cost Capitalized Subsequent to Acquisition 564      
Carrying Amount of Land 5,199      
Carrying Amount of Buildings and Improvements 9,905      
Accumulated Depreciation [1] $ 2,865      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1995      
Triple Net [Member] | Seattle, WA, SEA2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,420      
Initial Cost of Buildings & Improvements 15,555      
Cost Capitalized Subsequent to Acquisition 205      
Carrying Amount of Land 3,420      
Carrying Amount of Buildings and Improvements 15,760      
Accumulated Depreciation [1] $ 3,332      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Seattle, WA, SEA3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,630      
Initial Cost of Buildings & Improvements 10,257      
Cost Capitalized Subsequent to Acquisition 666      
Carrying Amount of Land 2,630      
Carrying Amount of Buildings and Improvements 10,923      
Accumulated Depreciation [1] $ 2,283      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
Triple Net [Member] | Seattle, WA, SEA4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 27,610      
Initial Cost of Land 10,670      
Initial Cost of Buildings & Improvements 37,291      
Cost Capitalized Subsequent to Acquisition 894      
Carrying Amount of Land 10,700      
Carrying Amount of Buildings and Improvements 38,155      
Accumulated Depreciation [1] $ 9,686      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2005      
Triple Net [Member] | Selbyville, DE, SLB, Senior Housing Triple Net [Member]        
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 298      
Carrying Amount of Land 769      
Carrying Amount of Buildings and Improvements 26,191      
Accumulated Depreciation [1] $ 3,440      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2007      
Triple Net [Member] | Seven Fields, PA, SVN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 484      
Initial Cost of Buildings & Improvements 4,663      
Cost Capitalized Subsequent to Acquisition 60      
Carrying Amount of Land 484      
Carrying Amount of Buildings and Improvements 4,722      
Accumulated Depreciation [1] $ 2,144      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 2011      
Triple Net [Member] | Severna Park, MD, SEV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 2,120      
Initial Cost of Buildings & Improvements [2] 31,273      
Cost Capitalized Subsequent to Acquisition [2] 808      
Carrying Amount of Land [2] 2,120      
Carrying Amount of Buildings and Improvements [2] 32,081      
Accumulated Depreciation [1],[2] $ 4,037      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 2001      
Triple Net [Member] | Shawnee, OK, SHW, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 80      
Initial Cost of Buildings & Improvements 1,400      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 80      
Carrying Amount of Buildings and Improvements 1,400      
Accumulated Depreciation [1] $ 738      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1998      
Triple Net [Member] | Shelbyville, KY, SHL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 630      
Initial Cost of Buildings & Improvements 3,870      
Cost Capitalized Subsequent to Acquisition 630      
Carrying Amount of Land 630      
Carrying Amount of Buildings and Improvements 4,500      
Accumulated Depreciation [1] $ 1,226      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1992      
Triple Net [Member] | Shelton, WA, SHN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 17,049      
Cost Capitalized Subsequent to Acquisition 296      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 17,345      
Accumulated Depreciation [1] $ 1,673      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1900      
Triple Net [Member] | Shepherdstown, WV, SHP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 250      
Initial Cost of Buildings & Improvements 13,806      
Cost Capitalized Subsequent to Acquisition 13      
Carrying Amount of Land 250      
Carrying Amount of Buildings and Improvements 13,819      
Accumulated Depreciation [1] $ 1,762      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Sherman, TX, SHR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 5,221      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 5,221      
Accumulated Depreciation [1] $ 1,272      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2014      
Triple Net [Member] | Shillington, PA, SHI, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,020      
Initial Cost of Buildings & Improvements 19,569      
Cost Capitalized Subsequent to Acquisition 956      
Carrying Amount of Land 1,020      
Carrying Amount of Buildings and Improvements 20,525      
Accumulated Depreciation [1] $ 2,652      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Shrewsbury, NJ, SRB, Senior Housing Triple Net [Member]        
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 724      
Carrying Amount of Land 2,127      
Carrying Amount of Buildings and Improvements 38,833      
Accumulated Depreciation [1] $ 5,049      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
Triple Net [Member] | Silver Spring, MD, SSP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,250      
Initial Cost of Buildings & Improvements 7,278      
Cost Capitalized Subsequent to Acquisition 269      
Carrying Amount of Land 1,250      
Carrying Amount of Buildings and Improvements 7,547      
Accumulated Depreciation [1] $ 802      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2009      
Triple Net [Member] | Silvis, IL, SIL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 16,420      
Cost Capitalized Subsequent to Acquisition 139      
Carrying Amount of Land 880      
Carrying Amount of Buildings and Improvements 16,559      
Accumulated Depreciation [1] $ 2,358      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | Sissonville, WV, SIS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 23,948      
Cost Capitalized Subsequent to Acquisition 55      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 24,003      
Accumulated Depreciation [1] $ 3,083      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Sisterville, WV, SSV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 5,400      
Cost Capitalized Subsequent to Acquisition 242      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 5,642      
Accumulated Depreciation [1] $ 794      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Sittingbourne, UKJ, STB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,622      
Initial Cost of Buildings & Improvements 7,815      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,622      
Carrying Amount of Buildings and Improvements 7,815      
Accumulated Depreciation [1] $ 220      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1950      
Triple Net [Member] | Smithfield, NC, SMT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 5,680      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 290      
Carrying Amount of Buildings and Improvements 5,680      
Accumulated Depreciation [1] $ 1,959      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2000      
Triple Net [Member] | Smithfield, NC, SMT3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 360      
Initial Cost of Buildings & Improvements 8,216      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 8,216      
Accumulated Depreciation [1] $ 256      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1989      
Triple Net [Member] | Somerset, MA, SMS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 29,577      
Cost Capitalized Subsequent to Acquisition 151      
Carrying Amount of Land 1,010      
Carrying Amount of Buildings and Improvements 29,728      
Accumulated Depreciation [1] $ 3,788      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1979      
Triple Net [Member] | Sonoma, CA, SON, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 14,497      
Initial Cost of Land 1,100      
Initial Cost of Buildings & Improvements 18,400      
Cost Capitalized Subsequent to Acquisition 1,700      
Carrying Amount of Land 1,109      
Carrying Amount of Buildings and Improvements 20,090      
Accumulated Depreciation [1] $ 5,507      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1987      
Triple Net [Member] | South Bend, IN, SBD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 670      
Initial Cost of Buildings & Improvements 17,770      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 17,770      
Accumulated Depreciation [1] $ 555      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
Triple Net [Member] | South Boston, MA, SBS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 385      
Initial Cost of Buildings & Improvements 2,002      
Cost Capitalized Subsequent to Acquisition 5,218      
Carrying Amount of Land 385      
Carrying Amount of Buildings and Improvements 7,220      
Accumulated Depreciation [1] $ 3,320      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 2003      
Triple Net [Member] | South Croydon, UKI, SCY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,949      
Initial Cost of Buildings & Improvements 2,507      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,949      
Carrying Amount of Buildings and Improvements 2,507      
Accumulated Depreciation [1] $ 75      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | South Pittsburg, TN, SPT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 5,628      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 430      
Carrying Amount of Buildings and Improvements 5,628      
Accumulated Depreciation [1] $ 2,077      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
Triple Net [Member] | Southbury, CT, SHY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,860      
Initial Cost of Buildings & Improvements 23,613      
Cost Capitalized Subsequent to Acquisition 958      
Carrying Amount of Land 1,860      
Carrying Amount of Buildings and Improvements 24,571      
Accumulated Depreciation [1] $ 3,020      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Sparks, NV, SPK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 46,526      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,700      
Carrying Amount of Buildings and Improvements 46,526      
Accumulated Depreciation [1] $ 8,130      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1996      
Triple Net [Member] | Spencer, WV, SPN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 8,810      
Cost Capitalized Subsequent to Acquisition 28      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 8,838      
Accumulated Depreciation [1] $ 1,170      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1952      
Triple Net [Member] | Spring City, TN, SPC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 420      
Initial Cost of Buildings & Improvements 6,085      
Cost Capitalized Subsequent to Acquisition 3,210      
Carrying Amount of Land 420      
Carrying Amount of Buildings and Improvements 9,295      
Accumulated Depreciation [1] $ 3,344      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2013      
Triple Net [Member] | Spring House, PA, SPH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 10,780      
Cost Capitalized Subsequent to Acquisition 199      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 10,979      
Accumulated Depreciation [1] $ 1,531      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2004      
Triple Net [Member] | Springfield, OR, SGF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,790      
Initial Cost of Buildings & Improvements 8,865      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,790      
Carrying Amount of Buildings and Improvements 8,865      
Accumulated Depreciation [1] $ 153      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1989      
Triple Net [Member] | Springfield, IL, SPF3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 10,100      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 768      
Carrying Amount of Buildings and Improvements 9,332      
Accumulated Depreciation [1] $ 833      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2002      
Triple Net [Member] | Springfield, IL, SPF4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 990      
Initial Cost of Buildings & Improvements 13,378      
Cost Capitalized Subsequent to Acquisition 1,084      
Carrying Amount of Land 990      
Carrying Amount of Buildings and Improvements 14,462      
Accumulated Depreciation [1] $ 451      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Spruce Pine, NC, SPP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 240      
Initial Cost of Buildings & Improvements 8,340      
Cost Capitalized Subsequent to Acquisition 676      
Carrying Amount of Land 240      
Carrying Amount of Buildings and Improvements 9,016      
Accumulated Depreciation [1] $ 287      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1986      
Triple Net [Member] | St. Charles, MD, SCS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 580      
Initial Cost of Buildings & Improvements 15,555      
Cost Capitalized Subsequent to Acquisition 84      
Carrying Amount of Land 580      
Carrying Amount of Buildings and Improvements 15,639      
Accumulated Depreciation [1] $ 2,079      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2008      
Triple Net [Member] | St. Paul, MN, STP2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,100      
Initial Cost of Buildings & Improvements 33,019      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,100      
Carrying Amount of Buildings and Improvements 33,019      
Accumulated Depreciation [1] $ 142      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1995      
Triple Net [Member] | Stamford, UKF, SMF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,175      
Initial Cost of Buildings & Improvements 3,871      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,175      
Carrying Amount of Buildings and Improvements 3,871      
Accumulated Depreciation [1] $ 116      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1988      
Triple Net [Member] | Stanwood, WA, STA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,260      
Initial Cost of Buildings & Improvements 28,474      
Cost Capitalized Subsequent to Acquisition 467      
Carrying Amount of Land 2,283      
Carrying Amount of Buildings and Improvements 28,918      
Accumulated Depreciation [1] $ 5,829      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
Triple Net [Member] | Statesville, NC, STV1, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 150      
Initial Cost of Buildings & Improvements 1,447      
Cost Capitalized Subsequent to Acquisition 266      
Carrying Amount of Land 150      
Carrying Amount of Buildings and Improvements 1,713      
Accumulated Depreciation [1] $ 633      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
Triple Net [Member] | Statesville, NC, STV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 6,183      
Cost Capitalized Subsequent to Acquisition 8      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 6,191      
Accumulated Depreciation [1] $ 2,068      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2008      
Triple Net [Member] | Statesville, NC, STV3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 140      
Initial Cost of Buildings & Improvements 3,627      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 140      
Carrying Amount of Buildings and Improvements 3,627      
Accumulated Depreciation [1] $ 1,243      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
Triple Net [Member] | Stillwater, OK, SWR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 80      
Initial Cost of Buildings & Improvements 1,400      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 80      
Carrying Amount of Buildings and Improvements 1,400      
Accumulated Depreciation [1] $ 741      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 1999      
Triple Net [Member] | Stockton, CA, STT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,863      
Initial Cost of Land 2,280      
Initial Cost of Buildings & Improvements 5,983      
Cost Capitalized Subsequent to Acquisition 397      
Carrying Amount of Land 2,372      
Carrying Amount of Buildings and Improvements 6,288      
Accumulated Depreciation [1] $ 1,455      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2012      
Triple Net [Member] | Stratford-upon-Avon, UKG, SUA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 944      
Initial Cost of Buildings & Improvements 17,341      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 944      
Carrying Amount of Buildings and Improvements 17,341      
Accumulated Depreciation [1] $ 335      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1997      
Triple Net [Member] | Stroudsburg, PA, STR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 340      
Initial Cost of Buildings & Improvements 16,313      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 340      
Carrying Amount of Buildings and Improvements 16,313      
Accumulated Depreciation [1] $ 519      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2008      
Triple Net [Member] | Summit, NJ, SUT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,080      
Initial Cost of Buildings & Improvements 14,152      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,080      
Carrying Amount of Buildings and Improvements 14,152      
Accumulated Depreciation [1] $ 1,843      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Triple Net [Member] | Superior, WI, SUP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,020      
Initial Cost of Buildings & Improvements 13,735      
Cost Capitalized Subsequent to Acquisition 6,159      
Carrying Amount of Land 1,020      
Carrying Amount of Buildings and Improvements 19,894      
Accumulated Depreciation [1] $ 1,282      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 1952      
Triple Net [Member] | Swanton, OH, SWA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 6,370      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 6,370      
Accumulated Depreciation [1] $ 2,062      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2005      
Triple Net [Member] | Takoma Park, MD, TKP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 10,136      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 10,136      
Accumulated Depreciation [1] $ 1,058      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
Triple Net [Member] | Terre Haute, IN, TRH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,370      
Initial Cost of Buildings & Improvements 18,016      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,370      
Carrying Amount of Buildings and Improvements 18,016      
Accumulated Depreciation [1] $ 354      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1984      
Triple Net [Member] | Texarkana, TX, TXR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 192      
Initial Cost of Buildings & Improvements 1,403      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 192      
Carrying Amount of Buildings and Improvements 1,403      
Accumulated Depreciation [1] $ 716      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1999      
Triple Net [Member] | The Villages, FL, TVG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,035      
Initial Cost of Buildings & Improvements 7,446      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,035      
Carrying Amount of Buildings and Improvements 7,446      
Accumulated Depreciation [1] $ 430      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2009      
Triple Net [Member] | Tomball, TX, TMB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,050      
Initial Cost of Buildings & Improvements 13,300      
Cost Capitalized Subsequent to Acquisition 671      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 13,971      
Accumulated Depreciation [1] $ 1,715      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Toms River, NJ, TMR, Senior Housing Triple Net [Member]        
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 708      
Carrying Amount of Land 1,679      
Carrying Amount of Buildings and Improvements 35,265      
Accumulated Depreciation [1] $ 4,631      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1971      
Triple Net [Member] | Toms River, NJ, TMR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,180      
Initial Cost of Buildings & Improvements 7,707      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,180      
Carrying Amount of Buildings and Improvements 7,707      
Accumulated Depreciation [1] $ 20      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1965      
Triple Net [Member] | Tonganoxie, KS, TGN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 3,690      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 3,690      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1985      
Triple Net [Member] | Topeka, KS, TPK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 260      
Initial Cost of Buildings & Improvements 12,712      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 12,712      
Accumulated Depreciation [1] $ 1,204      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1986      
Triple Net [Member] | Towson, MD, TWS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 1,180      
Initial Cost of Buildings & Improvements [2] 13,280      
Cost Capitalized Subsequent to Acquisition [2] 195      
Carrying Amount of Land [2] 1,180      
Carrying Amount of Buildings and Improvements [2] 13,475      
Accumulated Depreciation [1],[2] $ 1,819      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 2002      
Triple Net [Member] | Troy, OH, TRY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 2,000      
Cost Capitalized Subsequent to Acquisition 4,254      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 6,254      
Accumulated Depreciation [1] $ 1,672      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1993      
Triple Net [Member] | Troy, OH, TRY2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 470      
Initial Cost of Buildings & Improvements 16,730      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 470      
Carrying Amount of Buildings and Improvements 16,730      
Accumulated Depreciation [1] $ 5,214      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1987      
Triple Net [Member] | Trumbull, CT, TRU2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,440      
Initial Cost of Buildings & Improvements 43,384      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,440      
Carrying Amount of Buildings and Improvements 43,384      
Accumulated Depreciation [1] $ 5,393      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Tucson, AZ, TCS8, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,190      
Initial Cost of Buildings & Improvements 18,318      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,190      
Carrying Amount of Buildings and Improvements 18,318      
Accumulated Depreciation [1] $ 40      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1973      
Triple Net [Member] | Tulsa, OK, 1168, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,003      
Initial Cost of Buildings & Improvements 6,025      
Cost Capitalized Subsequent to Acquisition 20      
Carrying Amount of Land 3,003      
Carrying Amount of Buildings and Improvements 6,045      
Accumulated Depreciation [1] $ 2,927      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1992      
Triple Net [Member] | Tulsa, OK, TUL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,390      
Initial Cost of Buildings & Improvements 7,110      
Cost Capitalized Subsequent to Acquisition 462      
Carrying Amount of Land 1,390      
Carrying Amount of Buildings and Improvements 7,572      
Accumulated Depreciation [1] $ 1,239      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1990      
Triple Net [Member] | Tulsa, OK, TUL5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,320      
Initial Cost of Buildings & Improvements 10,087      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,320      
Carrying Amount of Buildings and Improvements 10,087      
Accumulated Depreciation [1] $ 296      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1975      
Triple Net [Member] | Tyler, TX, TYL2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 650      
Initial Cost of Buildings & Improvements 5,268      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 650      
Carrying Amount of Buildings and Improvements 5,268      
Accumulated Depreciation [1] $ 1,224      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1996      
Triple Net [Member] | Uhrichsville, OH, UCH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 24      
Initial Cost of Buildings & Improvements 6,716      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 24      
Carrying Amount of Buildings and Improvements 6,716      
Accumulated Depreciation [1] $ 1,882      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2003      
Triple Net [Member] | Uniontown, PA, UNT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 310      
Initial Cost of Buildings & Improvements 6,817      
Cost Capitalized Subsequent to Acquisition 84      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 6,901      
Accumulated Depreciation [1] $ 936      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
Triple Net [Member] | Upper Providence, PA, UPP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 30,095      
Carrying Amount of Land 1,900      
Carrying Amount of Buildings and Improvements 28,195      
Accumulated Depreciation [1] $ 483      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2013      
Triple Net [Member] | Vacaville, CA, VAC, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,640      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 17,100      
Cost Capitalized Subsequent to Acquisition 1,651      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 18,751      
Accumulated Depreciation [1] $ 5,251      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2002      
Triple Net [Member] | Vallejo, CA, VLE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,656      
Initial Cost of Land 4,000      
Initial Cost of Buildings & Improvements 18,000      
Cost Capitalized Subsequent to Acquisition 2,344      
Carrying Amount of Land 4,030      
Carrying Amount of Buildings and Improvements 20,315      
Accumulated Depreciation [1] $ 5,625      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1999      
Triple Net [Member] | Vallejo, CA, VLE2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 7,257      
Initial Cost of Land 2,330      
Initial Cost of Buildings & Improvements 15,407      
Cost Capitalized Subsequent to Acquisition 310      
Carrying Amount of Land 2,330      
Carrying Amount of Buildings and Improvements 15,717      
Accumulated Depreciation [1] $ 3,321      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2007      
Triple Net [Member] | Valley Falls, RI, VLY, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,080      
Initial Cost of Buildings & Improvements 7,433      
Cost Capitalized Subsequent to Acquisition 10      
Carrying Amount of Land 1,080      
Carrying Amount of Buildings and Improvements 7,443      
Accumulated Depreciation [1] $ 1,024      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Valparaiso, IN, VLP, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 112      
Initial Cost of Buildings & Improvements 2,558      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 112      
Carrying Amount of Buildings and Improvements 2,558      
Accumulated Depreciation [1] $ 1,027      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1998      
Triple Net [Member] | Valparaiso, IN, VLP2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 108      
Initial Cost of Buildings & Improvements 2,962      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 108      
Carrying Amount of Buildings and Improvements 2,962      
Accumulated Depreciation [1] $ 1,168      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1963      
Triple Net [Member] | Vancouver, WA, VCR, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 11,427      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 19,042      
Cost Capitalized Subsequent to Acquisition 270      
Carrying Amount of Land 1,821      
Carrying Amount of Buildings and Improvements 19,311      
Accumulated Depreciation [1] $ 3,855      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1974      
Triple Net [Member] | Venice, FL, VNC2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 500      
Initial Cost of Buildings & Improvements 6,000      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 500      
Carrying Amount of Buildings and Improvements 6,000      
Accumulated Depreciation [1] $ 2,019      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2003      
Triple Net [Member] | Venice, FL, VNC3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,150      
Initial Cost of Buildings & Improvements 10,674      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,150      
Carrying Amount of Buildings and Improvements 10,674      
Accumulated Depreciation [1] $ 1,811      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2000      
Triple Net [Member] | Vero Beach, FL, VRB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 263      
Initial Cost of Buildings & Improvements 3,187      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 263      
Carrying Amount of Buildings and Improvements 3,187      
Accumulated Depreciation [1] $ 1,246      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1900      
Triple Net [Member] | Vero Beach, FL, VRB3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 297      
Initial Cost of Buildings & Improvements 3,263      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 297      
Carrying Amount of Buildings and Improvements 3,263      
Accumulated Depreciation [1] $ 1,286      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2001      
Triple Net [Member] | Vero Beach, FL, VRB4, Senior Housing Triple Net [Member]        
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 15,112      
Carrying Amount of Land 2,930      
Carrying Amount of Buildings and Improvements 55,182      
Accumulated Depreciation [1] $ 10,691      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2001      
Triple Net [Member] | Virginia Beach, VA, VIR2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,540      
Initial Cost of Buildings & Improvements 22,593      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,540      
Carrying Amount of Buildings and Improvements 22,593      
Accumulated Depreciation [1] $ 719      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | Voorhees, NJ, VRH3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 37,299      
Cost Capitalized Subsequent to Acquisition 559      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 37,858      
Accumulated Depreciation [1] $ 4,942      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
Triple Net [Member] | Voorhees, NJ, VRH4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 1,900      
Initial Cost of Buildings & Improvements [2] 26,040      
Cost Capitalized Subsequent to Acquisition [2] 894      
Carrying Amount of Land [2] 1,900      
Carrying Amount of Buildings and Improvements [2] 26,934      
Accumulated Depreciation [1],[2] $ 3,515      
Year Acquired [2] Jan. 01, 2011      
Year Built [2] Jan. 01, 1998      
Triple Net [Member] | Voorhees, NJ, VRH5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,100      
Initial Cost of Buildings & Improvements 25,950      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,100      
Carrying Amount of Buildings and Improvements 25,950      
Accumulated Depreciation [1] $ 2,207      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Triple Net [Member] | Voorhees, NJ, VRH7, Senior Housing Triple Net [Member]        
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 1,490      
Carrying Amount of Land 3,847      
Carrying Amount of Buildings and Improvements 25,655      
Accumulated Depreciation [1] $ 1,667      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2005      
Triple Net [Member] | Wabash, IN, WAB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 670      
Initial Cost of Buildings & Improvements 14,588      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 14,588      
Accumulated Depreciation [1] $ 496      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
Triple Net [Member] | Waconia, MN, WCN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 890      
Initial Cost of Buildings & Improvements 14,726      
Cost Capitalized Subsequent to Acquisition 4,495      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 19,221      
Accumulated Depreciation [1] $ 2,061      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1992      
Triple Net [Member] | Wake Forest, NC, WKF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 200      
Initial Cost of Buildings & Improvements 3,003      
Cost Capitalized Subsequent to Acquisition 1,742      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 4,745      
Accumulated Depreciation [1] $ 1,974      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1988      
Triple Net [Member] | Walkersville, MD, WKV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,650      
Initial Cost of Buildings & Improvements 15,103      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,650      
Carrying Amount of Buildings and Improvements 15,103      
Accumulated Depreciation [1] $ 1,535      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Wall, NJ, WLL, Senior Housing Triple Net [Member]        
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 2,361      
Carrying Amount of Land 1,690      
Carrying Amount of Buildings and Improvements 27,671      
Accumulated Depreciation [1] $ 3,000      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
Triple Net [Member] | Wallingford, CT, WAL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 490      
Initial Cost of Buildings & Improvements 1,210      
Cost Capitalized Subsequent to Acquisition 59      
Carrying Amount of Land 490      
Carrying Amount of Buildings and Improvements 1,269      
Accumulated Depreciation [1] $ 283      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Walsall, UKG, WLS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,416      
Initial Cost of Buildings & Improvements 10,234      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,416      
Carrying Amount of Buildings and Improvements 10,234      
Accumulated Depreciation [1] $ 209      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2004      
Triple Net [Member] | Wamego, KS, WMG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 40      
Initial Cost of Buildings & Improvements 2,510      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 2,510      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2009      
Triple Net [Member] | Wareham, MA, WHM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 875      
Initial Cost of Buildings & Improvements 10,313      
Cost Capitalized Subsequent to Acquisition 1,701      
Carrying Amount of Land 875      
Carrying Amount of Buildings and Improvements 12,014      
Accumulated Depreciation [1] $ 4,711      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2012      
Triple Net [Member] | Warren, NJ, WAN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,000      
Initial Cost of Buildings & Improvements 30,810      
Cost Capitalized Subsequent to Acquisition 478      
Carrying Amount of Land 2,000      
Carrying Amount of Buildings and Improvements 31,288      
Accumulated Depreciation [1] $ 3,504      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Triple Net [Member] | Warwick, RI, WAW2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,530      
Initial Cost of Buildings & Improvements 18,564      
Cost Capitalized Subsequent to Acquisition 170      
Carrying Amount of Land 1,530      
Carrying Amount of Buildings and Improvements 18,734      
Accumulated Depreciation [1] $ 2,514      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2015      
Triple Net [Member] | Watchung, NJ, WTG, Senior Housing Triple Net [Member]        
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 901      
Carrying Amount of Land 1,976      
Carrying Amount of Buildings and Improvements 25,724      
Accumulated Depreciation [1] $ 2,885      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Waukee, IA, WKE, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,870      
Initial Cost of Buildings & Improvements 31,878      
Cost Capitalized Subsequent to Acquisition 1,075      
Carrying Amount of Land 1,870      
Carrying Amount of Buildings and Improvements 32,953      
Accumulated Depreciation [1] $ 2,829      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Triple Net [Member] | Waxahachie, TX, WXH2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 650      
Initial Cost of Buildings & Improvements 5,763      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 650      
Carrying Amount of Buildings and Improvements 5,763      
Accumulated Depreciation [1] $ 1,204      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1900      
Triple Net [Member] | Weatherford, TX, WTD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 660      
Initial Cost of Buildings & Improvements 5,261      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 660      
Carrying Amount of Buildings and Improvements 5,261      
Accumulated Depreciation [1] $ 1,232      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1900      
Triple Net [Member] | Webster, NY, WBT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 8,968      
Cost Capitalized Subsequent to Acquisition 36      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 9,004      
Accumulated Depreciation [1] $ 778      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
Triple Net [Member] | Webster, NY, WBT2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 21,127      
Cost Capitalized Subsequent to Acquisition 9      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 21,136      
Accumulated Depreciation [1] $ 1,753      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
Triple Net [Member] | Webster Groves, MO, WBG, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 1,790      
Carrying Amount of Buildings and Improvements 15,425      
Accumulated Depreciation [1] $ 1,368      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Wellingborough, UKF, WGB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,770      
Initial Cost of Buildings & Improvements 6,841      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 6,841      
Accumulated Depreciation [1] $ 184      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2011      
Triple Net [Member] | West Bend, WI, WEB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 620      
Initial Cost of Buildings & Improvements 17,790      
Cost Capitalized Subsequent to Acquisition 38      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 17,828      
Accumulated Depreciation [1] $ 1,890      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | West Chester, PA, WEC3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 29,237      
Cost Capitalized Subsequent to Acquisition 122      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 29,359      
Accumulated Depreciation [1] $ 3,833      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | West Chester, PA, WEC4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,290      
Initial Cost of Buildings & Improvements 42,258      
Cost Capitalized Subsequent to Acquisition 594      
Carrying Amount of Land 3,290      
Carrying Amount of Buildings and Improvements 42,852      
Accumulated Depreciation [1] $ 4,266      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2003      
Triple Net [Member] | West Chester, PA, WEC5, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 11,894      
Cost Capitalized Subsequent to Acquisition 5      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 11,899      
Accumulated Depreciation [1] $ 1,210      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1991      
Triple Net [Member] | West Orange, NJ, WTO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,280      
Initial Cost of Buildings & Improvements 10,687      
Cost Capitalized Subsequent to Acquisition 182      
Carrying Amount of Land 2,280      
Carrying Amount of Buildings and Improvements 10,869      
Accumulated Depreciation [1] $ 1,581      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | West Worthington, OH, WWO, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 510      
Initial Cost of Buildings & Improvements 5,090      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 510      
Carrying Amount of Buildings and Improvements 5,090      
Accumulated Depreciation [1] $ 1,479      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1900      
Triple Net [Member] | Westerville, OH, WSV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 740      
Initial Cost of Buildings & Improvements 8,287      
Cost Capitalized Subsequent to Acquisition 3,105      
Carrying Amount of Land 740      
Carrying Amount of Buildings and Improvements 11,392      
Accumulated Depreciation [1] $ 8,069      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 2001      
Triple Net [Member] | Westfield, IN, WEF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances [2] $ 0      
Initial Cost of Land [2] 890      
Initial Cost of Buildings & Improvements [2] 15,964      
Cost Capitalized Subsequent to Acquisition [2] 0      
Carrying Amount of Land [2] 890      
Carrying Amount of Buildings and Improvements [2] 15,964      
Accumulated Depreciation [1],[2] $ 538      
Year Acquired [2] Jan. 01, 2014      
Year Built [2] Jan. 01, 1988      
Triple Net [Member] | Westfield, NJ, WSF, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,270      
Initial Cost of Buildings & Improvements 16,589      
Cost Capitalized Subsequent to Acquisition 497      
Carrying Amount of Land 2,270      
Carrying Amount of Buildings and Improvements 17,086      
Accumulated Depreciation [1] $ 2,441      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1962      
Triple Net [Member] | Westford, MA, WSD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 920      
Initial Cost of Buildings & Improvements 13,829      
Cost Capitalized Subsequent to Acquisition 205      
Carrying Amount of Land 920      
Carrying Amount of Buildings and Improvements 14,034      
Accumulated Depreciation [1] $ 1,898      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2008      
Triple Net [Member] | Westlake, OH, WES, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,330      
Initial Cost of Buildings & Improvements 17,926      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,330      
Carrying Amount of Buildings and Improvements 17,926      
Accumulated Depreciation [1] $ 6,923      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1999      
Triple Net [Member] | Westmoreland, TN, WMD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 330      
Initial Cost of Buildings & Improvements 1,822      
Cost Capitalized Subsequent to Acquisition 2,640      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 4,462      
Accumulated Depreciation [1] $ 1,837      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 2012      
Triple Net [Member] | Weston Super Mare, UKK, WPM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,008      
Initial Cost of Buildings & Improvements 8,432      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,008      
Carrying Amount of Buildings and Improvements 8,432      
Accumulated Depreciation [1] $ 540      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1905      
Triple Net [Member] | Westworth Village, TX, WWV, Senior Housing Triple Net [Member]        
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 0      
Carrying Amount of Land 2,060      
Carrying Amount of Buildings and Improvements 31,296      
Accumulated Depreciation [1] $ 887      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wetaskiwin, AB, WTK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 336      
Initial Cost of Buildings & Improvements 20,131      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 336      
Carrying Amount of Buildings and Improvements 20,131      
Accumulated Depreciation [1] $ 574      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1900      
Triple Net [Member] | White Lake, MI, WTL, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 9,970      
Initial Cost of Land 2,920      
Initial Cost of Buildings & Improvements 20,179      
Cost Capitalized Subsequent to Acquisition 92      
Carrying Amount of Land 2,920      
Carrying Amount of Buildings and Improvements 20,271      
Accumulated Depreciation [1] $ 2,821      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1900      
Triple Net [Member] | Whittier, CA, WHT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,470      
Initial Cost of Buildings & Improvements 22,151      
Cost Capitalized Subsequent to Acquisition 458      
Carrying Amount of Land 4,483      
Carrying Amount of Buildings and Improvements 22,596      
Accumulated Depreciation [1] $ 5,940      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1987      
Triple Net [Member] | Wichita, KS, WTA, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,400      
Initial Cost of Buildings & Improvements 11,000      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,400      
Carrying Amount of Buildings and Improvements 11,000      
Accumulated Depreciation [1] $ 3,511      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2013      
Triple Net [Member] | Wichita, KS, WTA2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 860      
Initial Cost of Buildings & Improvements 8,873      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 8,873      
Accumulated Depreciation [1] $ 265      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Triple Net [Member] | Wichita, KS, WTA3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,404      
Initial Cost of Land 627      
Initial Cost of Buildings & Improvements 19,746      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 627      
Carrying Amount of Buildings and Improvements 19,752      
Accumulated Depreciation [1] $ 1,781      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2006      
Triple Net [Member] | Wichita, KS, WTA4, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 260      
Initial Cost of Buildings & Improvements 2,240      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 2,240      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2009      
Triple Net [Member] | Wichita, KS, WTA6, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 11,034      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 10,134      
Accumulated Depreciation [1] $ 286      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wichita Falls, TX, WCH3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,070      
Initial Cost of Buildings & Improvements 26,167      
Cost Capitalized Subsequent to Acquisition 86      
Carrying Amount of Land 1,070      
Carrying Amount of Buildings and Improvements 26,253      
Accumulated Depreciation [1] $ 1,037      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1986      
Triple Net [Member] | Wilkes-Barre, PA, WKB, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 610      
Initial Cost of Buildings & Improvements 13,842      
Cost Capitalized Subsequent to Acquisition 119      
Carrying Amount of Land 610      
Carrying Amount of Buildings and Improvements 13,961      
Accumulated Depreciation [1] $ 1,891      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
Triple Net [Member] | Wilkes-Barre, PA, WKB2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 570      
Initial Cost of Buildings & Improvements 2,301      
Cost Capitalized Subsequent to Acquisition 44      
Carrying Amount of Land 570      
Carrying Amount of Buildings and Improvements 2,345      
Accumulated Depreciation [1] $ 498      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1979      
Triple Net [Member] | Willard, OH, WLD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 730      
Initial Cost of Buildings & Improvements 6,447      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 730      
Carrying Amount of Buildings and Improvements 6,447      
Accumulated Depreciation [1] $ 669      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
Triple Net [Member] | Williamsport, PA, WLM2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 300      
Initial Cost of Buildings & Improvements 4,946      
Cost Capitalized Subsequent to Acquisition 373      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 5,319      
Accumulated Depreciation [1] $ 734      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1993      
Triple Net [Member] | Williamsport, PA, WLM3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 620      
Initial Cost of Buildings & Improvements 8,487      
Cost Capitalized Subsequent to Acquisition 438      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 8,925      
Accumulated Depreciation [1] $ 1,284      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
Triple Net [Member] | Williamstown, KY, WMT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 70      
Initial Cost of Buildings & Improvements 6,430      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 70      
Carrying Amount of Buildings and Improvements 6,430      
Accumulated Depreciation [1] $ 1,994      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2012      
Triple Net [Member] | Willow Grove, PA, WWG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 14,736      
Cost Capitalized Subsequent to Acquisition 109      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 14,845      
Accumulated Depreciation [1] $ 2,096      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wilmington, DE, WGT, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 9,494      
Cost Capitalized Subsequent to Acquisition 57      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 9,551      
Accumulated Depreciation [1] $ 1,339      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
Triple Net [Member] | Wilmington, NC, WLN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 210      
Initial Cost of Buildings & Improvements 2,991      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 210      
Carrying Amount of Buildings and Improvements 2,991      
Accumulated Depreciation [1] $ 1,348      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1993      
Triple Net [Member] | Wilmington, NC, WLN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 400      
Initial Cost of Buildings & Improvements 15,356      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 400      
Carrying Amount of Buildings and Improvements 15,356      
Accumulated Depreciation [1] $ 502      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | Wilmington, NC, WLN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 610      
Initial Cost of Buildings & Improvements 6,575      
Cost Capitalized Subsequent to Acquisition 587      
Carrying Amount of Land 610      
Carrying Amount of Buildings and Improvements 7,162      
Accumulated Depreciation [1] $ 264      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1970      
Triple Net [Member] | Windsor, CT, WDS, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,250      
Initial Cost of Buildings & Improvements 8,539      
Cost Capitalized Subsequent to Acquisition 1,843      
Carrying Amount of Land 2,250      
Carrying Amount of Buildings and Improvements 10,382      
Accumulated Depreciation [1] $ 1,462      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
Triple Net [Member] | Windsor, CT, WDS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 600      
Cost Capitalized Subsequent to Acquisition 944      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 1,544      
Accumulated Depreciation [1] $ 320      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Triple Net [Member] | Winston-Salem, NC, WSM, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 360      
Initial Cost of Buildings & Improvements 2,514      
Cost Capitalized Subsequent to Acquisition 459      
Carrying Amount of Land 360      
Carrying Amount of Buildings and Improvements 2,973      
Accumulated Depreciation [1] $ 1,062      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
Triple Net [Member] | Winter Garden, FL, WGD, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,350      
Initial Cost of Buildings & Improvements 7,937      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 7,937      
Accumulated Depreciation [1] $ 672      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2015      
Triple Net [Member] | Winter Haven, FL, WNH, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 710      
Initial Cost of Buildings & Improvements 10,038      
Cost Capitalized Subsequent to Acquisition 236      
Carrying Amount of Land 710      
Carrying Amount of Buildings and Improvements 10,274      
Accumulated Depreciation [1] $ 422      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
Triple Net [Member] | Witherwack, UKC, WWK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,128      
Initial Cost of Buildings & Improvements 8,265      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,128      
Carrying Amount of Buildings and Improvements 8,265      
Accumulated Depreciation [1] $ 530      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wolverhampton, UKG, WLV2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,880      
Initial Cost of Buildings & Improvements 7,982      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,880      
Carrying Amount of Buildings and Improvements 7,982      
Accumulated Depreciation [1] $ 516      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2001      
Triple Net [Member] | Worcester, MA, WRS2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,500      
Initial Cost of Buildings & Improvements 54,099      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,500      
Carrying Amount of Buildings and Improvements 54,099      
Accumulated Depreciation [1] $ 8,690      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2009      
Triple Net [Member] | Worcester, MA, WRS3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,300      
Initial Cost of Buildings & Improvements 9,060      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,300      
Carrying Amount of Buildings and Improvements 9,060      
Accumulated Depreciation [1] $ 1,854      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1980      
Triple Net [Member] | Wyncote, PA, WYN, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,700      
Initial Cost of Buildings & Improvements 22,244      
Cost Capitalized Subsequent to Acquisition 148      
Carrying Amount of Land 2,700      
Carrying Amount of Buildings and Improvements 22,392      
Accumulated Depreciation [1] $ 3,006      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wyncote, PA, WYN2, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,610      
Initial Cost of Buildings & Improvements 21,256      
Cost Capitalized Subsequent to Acquisition 214      
Carrying Amount of Land 1,610      
Carrying Amount of Buildings and Improvements 21,470      
Accumulated Depreciation [1] $ 2,751      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | Wyncote, PA, WYN3, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 900      
Initial Cost of Buildings & Improvements 7,811      
Cost Capitalized Subsequent to Acquisition 32      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 7,843      
Accumulated Depreciation [1] $ 1,047      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1900      
Triple Net [Member] | York, UKE, YRK, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,539      
Initial Cost of Buildings & Improvements 9,880      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,539      
Carrying Amount of Buildings and Improvements 9,880      
Accumulated Depreciation [1] $ 290      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1995      
Triple Net [Member] | Youngsville, NC, YNG, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 380      
Initial Cost of Buildings & Improvements 10,689      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 380      
Carrying Amount of Buildings and Improvements 10,689      
Accumulated Depreciation [1] $ 340      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1991      
Triple Net [Member] | Zionsville, IN, ZNV, Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,610      
Initial Cost of Buildings & Improvements 22,400      
Cost Capitalized Subsequent to Acquisition 1,691      
Carrying Amount of Land 1,610      
Carrying Amount of Buildings and Improvements 24,091      
Accumulated Depreciation [1] $ 3,265      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1982      
[1] Please see Note 2 to our consolidated financial statements for information regarding lives used for depreciation and amortization.
[2] Represents real property asset associated with a capital lease.