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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, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,616,125      
Initial Cost of Land 2,653,655      
Initial Cost of Buildings & Improvements 26,257,700      
Cost Capitalized Subsequent to Acquisition 1,956,105      
Carrying Amount of Land 2,734,467      
Carrying Amount of Buildings and Improvements 27,847,481      
Accumulated Depreciation 4,838,370 $ 4,093,494 $ 3,796,297 $ 3,020,908
Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 343,361      
Initial Cost of Land 818,863      
Initial Cost of Buildings & Improvements 7,759,508      
Cost Capitalized Subsequent to Acquisition 382,344      
Carrying Amount of Land 847,780      
Carrying Amount of Buildings and Improvements 8,112,937      
Accumulated Depreciation [1] 1,380,023      
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 361      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 21,348      
Accumulated Depreciation $ 1,990      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
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 1,089      
Carrying Amount of Land 990      
Carrying Amount of Buildings and Improvements 9,276      
Accumulated Depreciation $ 739      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1985      
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 $ 4,048      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
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 $ 7,621      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1993      
Triple Net [Member] | Albertville, AL, ALV 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 6,203      
Cost Capitalized Subsequent to Acquisition 280      
Carrying Amount of Land 176      
Carrying Amount of Buildings and Improvements 6,477      
Accumulated Depreciation $ 1,613      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 1,835      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 3,278      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1986      
Triple Net [Member] | Ankeny, IA, ANK Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,129      
Initial Cost of Buildings & Improvements 10,270      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,129      
Carrying Amount of Buildings and Improvements 10,270      
Accumulated Depreciation $ 534      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2012      
Triple Net [Member] | Apple Valley, CA, APV 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 16,639      
Cost Capitalized Subsequent to Acquisition 168      
Carrying Amount of Land 486      
Carrying Amount of Buildings and Improvements 16,801      
Accumulated Depreciation $ 4,199      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 2,019      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 1,777      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
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 $ 983      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1992      
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 19      
Carrying Amount of Land 140      
Carrying Amount of Buildings and Improvements 5,629      
Accumulated Depreciation $ 316      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2001      
Triple Net [Member] | Atlanta, GA, ATL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 11,518      
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 $ 2,943      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
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 $ 10,233      
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 $ 0      
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 $ 5,451      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1998      
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 $ 3,127      
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 $ 1,762      
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 $ 2,666      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 48      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 4,858      
Accumulated Depreciation $ 279      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2000      
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 $ 795      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1995      
Triple Net [Member] | Bellingham, WA, BGH2 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 19,861      
Cost Capitalized Subsequent to Acquisition 321      
Carrying Amount of Land 1,507      
Carrying Amount of Buildings and Improvements 20,175      
Accumulated Depreciation $ 4,945      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1996      
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 2,206      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 15,759      
Accumulated Depreciation $ 2,484      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1984      
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 $ 3,837      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2009      
Triple Net [Member] | Beverly Hills, CA, BVH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 1,079      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
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 3,750      
Initial Cost of Buildings & Improvements 10,807      
Cost Capitalized Subsequent to Acquisition 1,407      
Carrying Amount of Land 4,113      
Carrying Amount of Buildings and Improvements 11,851      
Accumulated Depreciation $ 970      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1996      
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 1,647      
Initial Cost of Buildings & Improvements 14,853      
Cost Capitalized Subsequent to Acquisition 1,594      
Carrying Amount of Land 1,806      
Carrying Amount of Buildings and Improvements 16,288      
Accumulated Depreciation $ 1,160      
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 1,591      
Initial Cost of Buildings & Improvements 19,092      
Cost Capitalized Subsequent to Acquisition 1,998      
Carrying Amount of Land 1,745      
Carrying Amount of Buildings and Improvements 20,937      
Accumulated Depreciation $ 1,469      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
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 1,462      
Initial Cost of Buildings & Improvements 9,056      
Cost Capitalized Subsequent to Acquisition 1,016      
Carrying Amount of Land 1,603      
Carrying Amount of Buildings and Improvements 9,931      
Accumulated Depreciation $ 718      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2010      
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 1,184      
Initial Cost of Buildings & Improvements 10,085      
Cost Capitalized Subsequent to Acquisition 1,089      
Carrying Amount of Land 1,299      
Carrying Amount of Buildings and Improvements 11,059      
Accumulated Depreciation $ 782      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1997      
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 $ 1,156      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
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 $ 3,877      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2008      
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 $ 6,423      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1992      
Triple Net [Member] | Bracknell, UKJ, BKN Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,329      
Initial Cost of Buildings & Improvements 12,167      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 4,329      
Carrying Amount of Buildings and Improvements 12,167      
Accumulated Depreciation $ 108      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2017      
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 $ 1,915      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1995      
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 $ 1,450      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2000      
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 $ 8,414      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1968      
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 13,296      
Cost Capitalized Subsequent to Acquisition 1,285      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 14,581      
Accumulated Depreciation $ 1,281      
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 $ 2,011      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 1,746      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2011      
Triple Net [Member] | Brentwood, UKH, BWD Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 38,810      
Initial Cost of Land 8,537      
Initial Cost of Buildings & Improvements 45,869      
Cost Capitalized Subsequent to Acquisition 5,304      
Carrying Amount of Land 9,362      
Carrying Amount of Buildings and Improvements 50,348      
Accumulated Depreciation $ 1,335      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2013      
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 916      
Carrying Amount of Land 1,290      
Carrying Amount of Buildings and Improvements 26,163      
Accumulated Depreciation $ 4,357      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
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 1,405      
Carrying Amount of Land 1,188      
Carrying Amount of Buildings and Improvements 18,758      
Accumulated Depreciation $ 3,605      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
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 5,548      
Carrying Amount of Land 692      
Carrying Amount of Buildings and Improvements 22,671      
Accumulated Depreciation $ 3,534      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 48      
Carrying Amount of Land 1,850      
Carrying Amount of Buildings and Improvements 3,098      
Accumulated Depreciation $ 1,546      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1970      
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 1,406      
Carrying Amount of Land 1,766      
Carrying Amount of Buildings and Improvements 49,571      
Accumulated Depreciation $ 8,989      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 1,347      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 33,157      
Accumulated Depreciation $ 5,419      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 $ 5,769      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1984      
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 $ 1,435      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2013      
Triple Net [Member] | Brooks, AB, BKS Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,016      
Initial Cost of Land 376      
Initial Cost of Buildings & Improvements 4,951      
Cost Capitalized Subsequent to Acquisition 563      
Carrying Amount of Land 415      
Carrying Amount of Buildings and Improvements 5,474      
Accumulated Depreciation $ 483      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2000      
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 1,646      
Carrying Amount of Land 670      
Carrying Amount of Buildings and Improvements 15,631      
Accumulated Depreciation $ 2,588      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
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 $ 1,917      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2000      
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 $ 2,142      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 501      
Carrying Amount of Land 1,700      
Carrying Amount of Buildings and Improvements 13,055      
Accumulated Depreciation $ 2,809      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
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 172      
Carrying Amount of Land 1,170      
Carrying Amount of Buildings and Improvements 19,377      
Accumulated Depreciation $ 3,560      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
Triple Net [Member] | Burnaby, BC, BBY Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,341      
Initial Cost of Land 7,623      
Initial Cost of Buildings & Improvements 13,844      
Cost Capitalized Subsequent to Acquisition 2,267      
Carrying Amount of Land 8,429      
Carrying Amount of Buildings and Improvements 15,306      
Accumulated Depreciation $ 1,372      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2006      
Triple Net [Member] | Calgary, AB, CAL6 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 17,109      
Initial Cost of Land 2,341      
Initial Cost of Buildings & Improvements 42,768      
Cost Capitalized Subsequent to Acquisition 4,787      
Carrying Amount of Land 2,588      
Carrying Amount of Buildings and Improvements 47,307      
Accumulated Depreciation $ 4,026      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1971      
Triple Net [Member] | Calgary, AB, CAL7 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 28,391      
Initial Cost of Land 4,569      
Initial Cost of Buildings & Improvements 70,199      
Cost Capitalized Subsequent to Acquisition 7,897      
Carrying Amount of Land 5,051      
Carrying Amount of Buildings and Improvements 77,613      
Accumulated Depreciation $ 6,544      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2001      
Triple Net [Member] | Camberley, UKJ, CBL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 10,580      
Initial Cost of Buildings & Improvements 41,548      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 10,580      
Carrying Amount of Buildings and Improvements 41,548      
Accumulated Depreciation $ 559      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2017      
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 $ 6,353      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1993      
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 $ 1,066      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1998      
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 $ 1,396      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2000      
Triple Net [Member] | Cape Coral, FL, CPC2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,530      
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 $ 2,778      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2009      
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 1,775      
Carrying Amount of Land 1,440      
Carrying Amount of Buildings and Improvements 18,777      
Accumulated Depreciation $ 1,746      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1990      
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 $ 1,421      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
Triple Net [Member] | Carrollton, TX, CRL4 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,010      
Initial Cost of Buildings & Improvements 19,549      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,010      
Carrying Amount of Buildings and Improvements 19,549      
Accumulated Depreciation $ 663      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2016      
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 $ 2,570      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1996      
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 $ 1,427      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 5,210      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1970      
Triple Net [Member] | Centreville, MD, CEV 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 14,602      
Cost Capitalized Subsequent to Acquisition 241      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 14,843      
Accumulated Depreciation $ 2,822      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1978      
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 $ 1,428      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1997      
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 140      
Carrying Amount of Land 230      
Carrying Amount of Buildings and Improvements 22,974      
Accumulated Depreciation $ 4,081      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
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 306      
Carrying Amount of Land 440      
Carrying Amount of Buildings and Improvements 17,881      
Accumulated Depreciation $ 3,203      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
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 $ 1,372      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
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 $ 4,320      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 $ 1,733      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2009      
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 $ 798      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1996      
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 172      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 6,835      
Accumulated Depreciation $ 1,461      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
Triple Net [Member] | Citrus Heights, CA, CTH 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 31,876      
Cost Capitalized Subsequent to Acquisition 589      
Carrying Amount of Land 2,300      
Carrying Amount of Buildings and Improvements 32,465      
Accumulated Depreciation $ 8,132      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
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 $ 1,410      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1996      
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 $ 1,159      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1998      
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 $ 1,339      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 1,524      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 2,838      
Initial Cost of Buildings & Improvements 16,927      
Cost Capitalized Subsequent to Acquisition 1,910      
Carrying Amount of Land 3,112      
Carrying Amount of Buildings and Improvements 18,563      
Accumulated Depreciation $ 1,631      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1994      
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 9,808      
Initial Cost of Buildings & Improvements 24,991      
Cost Capitalized Subsequent to Acquisition 3,362      
Carrying Amount of Land 10,756      
Carrying Amount of Buildings and Improvements 27,406      
Accumulated Depreciation $ 3,164      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2013      
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 544      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 5,404      
Accumulated Depreciation $ 1,252      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1986      
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 $ 3,730      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2008      
Triple Net [Member] | Colorado Springs, CO, CSP4 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 25,493      
Cost Capitalized Subsequent to Acquisition 693      
Carrying Amount of Land 1,730      
Carrying Amount of Buildings and Improvements 26,186      
Accumulated Depreciation $ 1,184      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2016      
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 1,371      
Carrying Amount of Land 1,082      
Carrying Amount of Buildings and Improvements 15,802      
Accumulated Depreciation $ 3,108      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2002      
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 $ 1,165      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
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 $ 2,359      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2009      
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 $ 676      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
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 $ 1,693      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 634      
Carrying Amount of Land 1,760      
Carrying Amount of Buildings and Improvements 43,813      
Accumulated Depreciation $ 7,855      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
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 2,036      
Initial Cost of Buildings & Improvements 5,120      
Cost Capitalized Subsequent to Acquisition 691      
Carrying Amount of Land 2,232      
Carrying Amount of Buildings and Improvements 5,615      
Accumulated Depreciation $ 460      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1994      
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 $ 1,736      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 2010      
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 100      
Carrying Amount of Land 1,550      
Carrying Amount of Buildings and Improvements 8,486      
Accumulated Depreciation $ 1,084      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2013      
Triple Net [Member] | Corby, UKF, CBY Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,228      
Initial Cost of Buildings & Improvements 5,144      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,228      
Carrying Amount of Buildings and Improvements 5,144      
Accumulated Depreciation $ 108      
Year Acquired Jan. 01, 2017      
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 1,962      
Initial Cost of Buildings & Improvements 13,830      
Cost Capitalized Subsequent to Acquisition 1,526      
Carrying Amount of Land 2,151      
Carrying Amount of Buildings and Improvements 15,166      
Accumulated Depreciation $ 1,113      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2014      
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 $ 1,695      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 1,853      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 822      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1996      
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 384      
Carrying Amount of Land 2,880      
Carrying Amount of Buildings and Improvements 9,054      
Accumulated Depreciation $ 1,366      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
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 $ 4,418      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1996      
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 100      
Carrying Amount of Land 1,760      
Carrying Amount of Buildings and Improvements 8,405      
Accumulated Depreciation $ 1,538      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
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 2,503      
Initial Cost of Buildings & Improvements 9,058      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,503      
Carrying Amount of Buildings and Improvements 9,058      
Accumulated Depreciation $ 529      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2015      
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 141      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 22,407      
Accumulated Depreciation $ 4,104      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1984      
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 1,148      
Carrying Amount of Land 2,120      
Carrying Amount of Buildings and Improvements 41,324      
Accumulated Depreciation $ 7,471      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
Triple Net [Member] | Dundalk, MD, DND 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 32,047      
Cost Capitalized Subsequent to Acquisition 784      
Carrying Amount of Land 1,770      
Carrying Amount of Buildings and Improvements 32,831      
Accumulated Depreciation $ 5,984      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1978      
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 $ 11,283      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1999      
Triple Net [Member] | Eagan, MN, EAG Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 16,741      
Initial Cost of Land 2,260      
Initial Cost of Buildings & Improvements 31,643      
Cost Capitalized Subsequent to Acquisition 4      
Carrying Amount of Land 2,260      
Carrying Amount of Buildings and Improvements 31,647      
Accumulated Depreciation $ 1,772      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2004      
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 835      
Carrying Amount of Land 1,380      
Carrying Amount of Buildings and Improvements 35,064      
Accumulated Depreciation $ 5,769      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1998      
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 1,604      
Carrying Amount of Land 1,264      
Carrying Amount of Buildings and Improvements 29,670      
Accumulated Depreciation $ 5,414      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1988      
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 4,071      
Initial Cost of Buildings & Improvements 24,438      
Cost Capitalized Subsequent to Acquisition 2,755      
Carrying Amount of Land 4,465      
Carrying Amount of Buildings and Improvements 26,799      
Accumulated Depreciation $ 2,323      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
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 $ 1,931      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 1,321      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
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 1,921      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 16,770      
Accumulated Depreciation $ 1,530      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1985      
Triple Net [Member] | Edmond, OK, EDM4 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 25,167      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,650      
Carrying Amount of Buildings and Improvements 25,167      
Accumulated Depreciation $ 621      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2017      
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 $ 2,152      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1999      
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 641      
Carrying Amount of Land 2,560      
Carrying Amount of Buildings and Improvements 58,132      
Accumulated Depreciation $ 5,204      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2010      
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 26      
Carrying Amount of Land 930      
Carrying Amount of Buildings and Improvements 4,540      
Accumulated Depreciation $ 936      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1966      
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 1,489      
Carrying Amount of Land 769      
Carrying Amount of Buildings and Improvements 13,930      
Accumulated Depreciation $ 2,718      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
Triple Net [Member] | Epsom, UKJ, ESM Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 39,175      
Initial Cost of Land 20,159      
Initial Cost of Buildings & Improvements 34,803      
Cost Capitalized Subsequent to Acquisition 5,346      
Carrying Amount of Land 22,106      
Carrying Amount of Buildings and Improvements 38,201      
Accumulated Depreciation $ 1,014      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2014      
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 70      
Carrying Amount of Land 50      
Carrying Amount of Buildings and Improvements 4,020      
Accumulated Depreciation $ 225      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1994      
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 $ 2,689      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
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 $ 6,266      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1998      
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 112      
Carrying Amount of Land 570      
Carrying Amount of Buildings and Improvements 9,231      
Accumulated Depreciation $ 1,402      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1987      
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 $ 5,212      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1973      
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 1,071      
Carrying Amount of Land 2,850      
Carrying Amount of Buildings and Improvements 56,246      
Accumulated Depreciation $ 9,157      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1982      
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 50      
Carrying Amount of Land 780      
Carrying Amount of Buildings and Improvements 11,590      
Accumulated Depreciation $ 658      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2003      
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 2,036      
Initial Cost of Buildings & Improvements 5,737      
Cost Capitalized Subsequent to Acquisition 751      
Carrying Amount of Land 2,232      
Carrying Amount of Buildings and Improvements 6,291      
Accumulated Depreciation $ 501      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1980      
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 1,802      
Carrying Amount of Land 2,150      
Carrying Amount of Buildings and Improvements 34,753      
Accumulated Depreciation $ 2,191      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1991      
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 $ 1,866      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1997      
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 $ 976      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1997      
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 $ 3,132      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
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 $ 1,262      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1999      
Triple Net [Member] | Florence, AL, FLR2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 3,234      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 266      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 15,096      
Accumulated Depreciation $ 2,866      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1908      
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 100      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 8,514      
Accumulated Depreciation $ 1,276      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
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 $ 4,045      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2009      
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 $ 1,797      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
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 356      
Carrying Amount of Land 330      
Carrying Amount of Buildings and Improvements 19,922      
Accumulated Depreciation $ 3,512      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1980      
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 $ 3,505      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2007      
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 $ 2,408      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2006      
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 $ 3,614      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
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 $ 2,119      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1971      
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 $ 6,879      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1999      
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 $ 2,045      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2010      
Triple Net [Member] | Fremont, CA, FRE 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 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 $ 9,360      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1987      
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 $ 8,599      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1991      
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 91      
Carrying Amount of Land 200      
Carrying Amount of Buildings and Improvements 2,891      
Accumulated Depreciation $ 172      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2000      
Triple Net [Member] | Gardnerville, NV, GRD Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 8,717      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 1999      
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 $ 2,390      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 1,283      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1994      
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 $ 2,022      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
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 $ 1,127      
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 118      
Carrying Amount of Land 590      
Carrying Amount of Buildings and Improvements 9,031      
Accumulated Depreciation $ 1,844      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1987      
Triple Net [Member] | Gig Harbor, WA, GGH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 3,863      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1994      
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 777      
Carrying Amount of Land 2,550      
Carrying Amount of Buildings and Improvements 3,717      
Accumulated Depreciation $ 597      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1996      
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 $ 3,731      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 4,392      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
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 2,220      
Initial Cost of Buildings & Improvements 17,648      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,220      
Carrying Amount of Buildings and Improvements 17,648      
Accumulated Depreciation $ 1,105      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2014      
Triple Net [Member] | Greeley, CO, GLY2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,077      
Initial Cost of Buildings & Improvements 18,051      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,077      
Carrying Amount of Buildings and Improvements 18,051      
Accumulated Depreciation $ 270      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2009      
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 $ 1,685      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1983      
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 $ 1,425      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
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 $ 2,618      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 $ 1,814      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1997      
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 $ 1,774      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 4,334      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2007      
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 968      
Carrying Amount of Land 2,430      
Carrying Amount of Buildings and Improvements 20,909      
Accumulated Depreciation $ 4,156      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1975      
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 520      
Initial Cost of Buildings & Improvements 16,363      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 520      
Carrying Amount of Buildings and Improvements 16,363      
Accumulated Depreciation $ 1,293      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2015      
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 222      
Carrying Amount of Land 840      
Carrying Amount of Buildings and Improvements 10,765      
Accumulated Depreciation $ 2,271      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1966      
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 $ 1,882      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1998      
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 1,382      
Initial Cost of Buildings & Improvements 9,829      
Cost Capitalized Subsequent to Acquisition 1,083      
Carrying Amount of Land 1,515      
Carrying Amount of Buildings and Improvements 10,779      
Accumulated Depreciation $ 1,257      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2012      
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 7,402      
Initial Cost of Buildings & Improvements 8,266      
Cost Capitalized Subsequent to Acquisition 1,514      
Carrying Amount of Land 8,117      
Carrying Amount of Buildings and Improvements 9,064      
Accumulated Depreciation $ 772      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2001      
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 1,771      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 29,883      
Accumulated Depreciation $ 5,298      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
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 2,924      
Initial Cost of Buildings & Improvements 7,527      
Cost Capitalized Subsequent to Acquisition 1,010      
Carrying Amount of Land 3,206      
Carrying Amount of Buildings and Improvements 8,254      
Accumulated Depreciation $ 970      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2012      
Triple Net [Member] | Hattiesburg, MS, HAT2 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 13,469      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 450      
Carrying Amount of Buildings and Improvements 13,469      
Accumulated Depreciation $ 2,364      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
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 1,080      
Carrying Amount of Land 1,884      
Carrying Amount of Buildings and Improvements 35,069      
Accumulated Depreciation $ 6,307      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
Triple Net [Member] | Hermitage, TN, HRM 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 9,943      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,500      
Carrying Amount of Buildings and Improvements 9,943      
Accumulated Depreciation $ 1,695      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
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 1,900      
Initial Cost of Buildings & Improvements 24,353      
Cost Capitalized Subsequent to Acquisition 2,537      
Carrying Amount of Land 2,083      
Carrying Amount of Buildings and Improvements 26,706      
Accumulated Depreciation $ 3,389      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
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 29      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 4,239      
Accumulated Depreciation $ 247      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
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 $ 627      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1994      
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 $ 2,083      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2000      
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 $ 1,090      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1999      
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 $ 1,370      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1994      
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 $ 1,646      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 2,136      
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 $ 2,091      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1999      
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 2,159      
Initial Cost of Buildings & Improvements 4,194      
Cost Capitalized Subsequent to Acquisition 614      
Carrying Amount of Land 2,368      
Carrying Amount of Buildings and Improvements 4,599      
Accumulated Depreciation $ 592      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2013      
Triple Net [Member] | Hindhead, UKJ, HDH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 47,374      
Initial Cost of Land 17,852      
Initial Cost of Buildings & Improvements 48,645      
Cost Capitalized Subsequent to Acquisition 6,463      
Carrying Amount of Land 19,576      
Carrying Amount of Buildings and Improvements 53,383      
Accumulated Depreciation $ 1,392      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2012      
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 1,247      
Carrying Amount of Land 1,120      
Carrying Amount of Buildings and Improvements 7,555      
Accumulated Depreciation $ 718      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1992      
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 13      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 7,473      
Accumulated Depreciation $ 407      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
Triple Net [Member] | Howard, WI, HWD Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 579      
Initial Cost of Buildings & Improvements 32,122      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 579      
Carrying Amount of Buildings and Improvements 32,122      
Accumulated Depreciation $ 157      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2016      
Triple Net [Member] | Howell, NJ, HWL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 8,835      
Initial Cost of Land 1,066      
Initial Cost of Buildings & Improvements 21,577      
Cost Capitalized Subsequent to Acquisition 769      
Carrying Amount of Land 1,071      
Carrying Amount of Buildings and Improvements 22,341      
Accumulated Depreciation $ 4,129      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2007      
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 $ 3,716      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1997      
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 $ 1,390      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
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 $ 1,639      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
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 3,107      
Carrying Amount of Land 6,500      
Carrying Amount of Buildings and Improvements 29,512      
Accumulated Depreciation $ 3,820      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Triple Net [Member] | Jacksonville, FL, JCK2 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 25,231      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 750      
Carrying Amount of Buildings and Improvements 25,231      
Accumulated Depreciation $ 987      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2014      
Triple Net [Member] | Jacksonville, FL, JCK3 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 26,381      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 26,381      
Accumulated Depreciation $ 1,031      
Year Acquired Jan. 01, 2013      
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 $ 1,113      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
Triple Net [Member] | Katy, TX, KTY Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,778      
Initial Cost of Buildings & Improvements 22,622      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,778      
Carrying Amount of Buildings and Improvements 22,622      
Accumulated Depreciation $ 387      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2015      
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 $ 9,033      
Year Acquired Jan. 01, 1998      
Year Built Jan. 01, 2000      
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 316      
Carrying Amount of Land 1,083      
Carrying Amount of Buildings and Improvements 23,229      
Accumulated Depreciation $ 4,219      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
Triple Net [Member] | Kingston upon Thames, UKI, KUT Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 56,849      
Initial Cost of Land 33,063      
Initial Cost of Buildings & Improvements 46,696      
Cost Capitalized Subsequent to Acquisition 7,751      
Carrying Amount of Land 36,258      
Carrying Amount of Buildings and Improvements 51,252      
Accumulated Depreciation $ 1,351      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2014      
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 $ 1,792      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
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 2,437      
Initial Cost of Buildings & Improvements 9,414      
Cost Capitalized Subsequent to Acquisition 1,145      
Carrying Amount of Land 2,672      
Carrying Amount of Buildings and Improvements 10,324      
Accumulated Depreciation $ 1,207      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2009      
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 $ 1,515      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
Triple Net [Member] | Lafayette, LA, 21167101 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 $ 4,358      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1993      
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 $ 1,430      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
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 $ 1,372      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2014      
Triple Net [Member] | Lakeway, TX, 21331101 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 23,203      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 5,142      
Carrying Amount of Buildings and Improvements 23,203      
Accumulated Depreciation $ 2,550      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2011      
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 62      
Carrying Amount of Land 2,160      
Carrying Amount of Buildings and Improvements 28,153      
Accumulated Depreciation $ 2,823      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2010      
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 $ 1,240      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Lakewood Ranch, FL, LWR2 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 22,388      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,000      
Carrying Amount of Buildings and Improvements 22,388      
Accumulated Depreciation $ 3,234      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2005      
Triple Net [Member] | Lancaster, CA, LAN 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 15,295      
Cost Capitalized Subsequent to Acquisition 625      
Carrying Amount of Land 712      
Carrying Amount of Buildings and Improvements 15,907      
Accumulated Depreciation $ 4,279      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
Triple Net [Member] | Lancaster, PA, LCR2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,680      
Initial Cost of Buildings & Improvements 14,039      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,680      
Carrying Amount of Buildings and Improvements 14,039      
Accumulated Depreciation $ 364      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2017      
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 171      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 25,052      
Accumulated Depreciation $ 4,717      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1979      
Triple Net [Member] | LaPlata, MD, LPL4 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 19,068      
Cost Capitalized Subsequent to Acquisition 466      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 19,534      
Accumulated Depreciation $ 3,653      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1984      
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 $ 3,967      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
Triple Net [Member] | Lawrence, KS, LWN 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 8,716      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 250      
Carrying Amount of Buildings and Improvements 8,716      
Accumulated Depreciation $ 1,245      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1996      
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 $ 2,541      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1986      
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 $ 7,947      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1998      
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 1,974      
Initial Cost of Buildings & Improvements 13,239      
Cost Capitalized Subsequent to Acquisition 1,470      
Carrying Amount of Land 2,165      
Carrying Amount of Buildings and Improvements 14,518      
Accumulated Depreciation $ 1,007      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2013      
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 3,060      
Initial Cost of Buildings & Improvements 24,410      
Cost Capitalized Subsequent to Acquisition 2,654      
Carrying Amount of Land 3,355      
Carrying Amount of Buildings and Improvements 26,769      
Accumulated Depreciation $ 3,516      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2010      
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 $ 1,739      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
Triple Net [Member] | Lethbridge, AB, LTB Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 1,505      
Initial Cost of Land 1,214      
Initial Cost of Buildings & Improvements 2,750      
Cost Capitalized Subsequent to Acquisition 419      
Carrying Amount of Land 1,342      
Carrying Amount of Buildings and Improvements 3,040      
Accumulated Depreciation $ 348      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2003      
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 148      
Carrying Amount of Land 480      
Carrying Amount of Buildings and Improvements 1,918      
Accumulated Depreciation $ 120      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1994      
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 $ 2,011      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1997      
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 $ 7,376      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 1,382      
Initial Cost of Buildings & Improvements 30,324      
Cost Capitalized Subsequent to Acquisition 3,063      
Carrying Amount of Land 1,515      
Carrying Amount of Buildings and Improvements 33,254      
Accumulated Depreciation $ 2,350      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2012      
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 $ 1,598      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 1,402      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
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 95      
Carrying Amount of Land 390      
Carrying Amount of Buildings and Improvements 13,902      
Accumulated Depreciation $ 2,789      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
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 1,056      
Carrying Amount of Land 859      
Carrying Amount of Buildings and Improvements 22,980      
Accumulated Depreciation $ 4,341      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1997      
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 10,991      
Carrying Amount of Land 1,258      
Carrying Amount of Buildings and Improvements 28,882      
Accumulated Depreciation $ 4,068      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Triple Net [Member] | Lititz, PA, LTZ 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 13,836      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 13,836      
Accumulated Depreciation $ 359      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2016      
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 1,265      
Carrying Amount of Land 3,357      
Carrying Amount of Buildings and Improvements 39,720      
Accumulated Depreciation $ 7,308      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
Triple Net [Member] | Livermore, CA, LVM Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 2,008      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1974      
Triple Net [Member] | Livingston, NJ, LIV Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 8,000      
Initial Cost of Buildings & Improvements 44,424      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 8,000      
Carrying Amount of Buildings and Improvements 44,424      
Accumulated Depreciation $ 667      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2017      
Triple Net [Member] | London, UKI, LDN5 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 8,158      
Initial Cost of Buildings & Improvements 17,545      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 8,158      
Carrying Amount of Buildings and Improvements 17,545      
Accumulated Depreciation $ 579      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2016      
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 $ 1,576      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 $ 1,172      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2011      
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 35      
Carrying Amount of Land 280      
Carrying Amount of Buildings and Improvements 4,355      
Accumulated Depreciation $ 240      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
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 $ 4,594      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1978      
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 44      
Carrying Amount of Land 680      
Carrying Amount of Buildings and Improvements 3,422      
Accumulated Depreciation $ 824      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1969      
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 1,369      
Initial Cost of Buildings & Improvements 15,668      
Cost Capitalized Subsequent to Acquisition 1,646      
Carrying Amount of Land 1,502      
Carrying Amount of Buildings and Improvements 17,182      
Accumulated Depreciation $ 2,161      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2008      
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 1,744      
Carrying Amount of Land 1,100      
Carrying Amount of Buildings and Improvements 21,530      
Accumulated Depreciation $ 3,877      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
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 $ 1,484      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 84      
Carrying Amount of Land 960      
Carrying Amount of Buildings and Improvements 29,117      
Accumulated Depreciation $ 5,262      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
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 1,605      
Initial Cost of Buildings & Improvements 27,249      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,605      
Carrying Amount of Buildings and Improvements 27,249      
Accumulated Depreciation $ 1,826      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2015      
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 589      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 23,213      
Accumulated Depreciation $ 3,813      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 $ 2,899      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
Triple Net [Member] | Mankato, MN, MKA 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 32,104      
Cost Capitalized Subsequent to Acquisition 13      
Carrying Amount of Land 1,460      
Carrying Amount of Buildings and Improvements 32,117      
Accumulated Depreciation $ 1,792      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2006      
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 $ 1,516      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
Triple Net [Member] | Manteca, CA, MCA 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 12,125      
Cost Capitalized Subsequent to Acquisition 1,566      
Carrying Amount of Land 1,312      
Carrying Amount of Buildings and Improvements 13,679      
Accumulated Depreciation $ 5,000      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1986      
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 $ 868      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1999      
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 $ 1,264      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2012      
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 $ 1,083      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1976      
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 2,677      
Initial Cost of Buildings & Improvements 6,822      
Cost Capitalized Subsequent to Acquisition 918      
Carrying Amount of Land 2,936      
Carrying Amount of Buildings and Improvements 7,482      
Accumulated Depreciation $ 622      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Marlow, UKJ, MLW Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 9,619      
Initial Cost of Buildings & Improvements 42,134      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 9,619      
Carrying Amount of Buildings and Improvements 42,134      
Accumulated Depreciation $ 1,970      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2014      
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 $ 0      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1900      
Triple Net [Member] | Marysville, WA, MRS2 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 4,780      
Cost Capitalized Subsequent to Acquisition 903      
Carrying Amount of Land 620      
Carrying Amount of Buildings and Improvements 5,683      
Accumulated Depreciation $ 2,072      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 166      
Carrying Amount of Land 1,830      
Carrying Amount of Buildings and Improvements 20,784      
Accumulated Depreciation $ 3,552      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
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 $ 1,920      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1900      
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 $ 1,666      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 2010      
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 3,894      
Carrying Amount of Land 1,440      
Carrying Amount of Buildings and Improvements 19,699      
Accumulated Depreciation $ 3,093      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
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 $ 2,888      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1971      
Triple Net [Member] | Medicine Hat, AB, MEH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 2,471      
Initial Cost of Land 932      
Initial Cost of Buildings & Improvements 5,566      
Cost Capitalized Subsequent to Acquisition 686      
Carrying Amount of Land 1,031      
Carrying Amount of Buildings and Improvements 6,154      
Accumulated Depreciation $ 559      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
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 4,616      
Carrying Amount of Land 4,306      
Carrying Amount of Buildings and Improvements 77,874      
Accumulated Depreciation $ 13,828      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
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 638      
Carrying Amount of Land 1,240      
Carrying Amount of Buildings and Improvements 27,807      
Accumulated Depreciation $ 5,006      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1968      
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 $ 2,057      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 173      
Carrying Amount of Land 860      
Carrying Amount of Buildings and Improvements 10,102      
Accumulated Depreciation $ 2,012      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1967      
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 233      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 1,705      
Accumulated Depreciation $ 623      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1968      
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 $ 3,105      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2008      
Triple Net [Member] | Mesa, AZ, MES 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 9,087      
Cost Capitalized Subsequent to Acquisition 1,567      
Carrying Amount of Land 950      
Carrying Amount of Buildings and Improvements 10,654      
Accumulated Depreciation $ 4,657      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 2000      
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 $ 2,758      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
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 $ 1,802      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1991      
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 $ 2,555      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1994      
Triple Net [Member] | Mill Creek, WA, MLC Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 10,150      
Initial Cost of Buildings & Improvements 60,274      
Cost Capitalized Subsequent to Acquisition 935      
Carrying Amount of Land 10,179      
Carrying Amount of Buildings and Improvements 61,179      
Accumulated Depreciation $ 17,227      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
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 129      
Carrying Amount of Land 840      
Carrying Amount of Buildings and Improvements 30,073      
Accumulated Depreciation $ 5,532      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1986      
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 1,826      
Initial Cost of Buildings & Improvements 18,654      
Cost Capitalized Subsequent to Acquisition 1,979      
Carrying Amount of Land 2,002      
Carrying Amount of Buildings and Improvements 20,456      
Accumulated Depreciation $ 1,488      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2007      
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 $ 1,569      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 2,576      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1998      
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 86      
Carrying Amount of Land 720      
Carrying Amount of Buildings and Improvements 6,295      
Accumulated Depreciation $ 1,323      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
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 $ 1,750      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2001      
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 $ 2,181      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 2000      
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 $ 1,669      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 219      
Carrying Amount of Land 3,250      
Carrying Amount of Buildings and Improvements 27,991      
Accumulated Depreciation $ 1,454      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
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 114      
Carrying Amount of Land 1,160      
Carrying Amount of Buildings and Improvements 13,307      
Accumulated Depreciation $ 2,666      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
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 1,073      
Carrying Amount of Land 3,500      
Carrying Amount of Buildings and Improvements 32,075      
Accumulated Depreciation $ 5,350      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
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 1,653      
Carrying Amount of Land 2,071      
Carrying Amount of Buildings and Improvements 53,270      
Accumulated Depreciation $ 9,619      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
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 27      
Carrying Amount of Land 6,400      
Carrying Amount of Buildings and Improvements 23,902      
Accumulated Depreciation $ 2,531      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2014      
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 $ 2,149      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
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 $ 3,201      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
Triple Net [Member] | Moulton, UKF, MUL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,695      
Initial Cost of Buildings & Improvements 12,510      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,695      
Carrying Amount of Buildings and Improvements 12,510      
Accumulated Depreciation $ 247      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 1995      
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 $ 2,586      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1985      
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 $ 1,636      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 $ 5,550      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 $ 7,529      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2007      
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 199      
Carrying Amount of Land 1,200      
Carrying Amount of Buildings and Improvements 16,025      
Accumulated Depreciation $ 3,028      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1980      
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 $ 6,424      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1994      
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 1,480      
Initial Cost of Buildings & Improvements 4,378      
Cost Capitalized Subsequent to Acquisition 566      
Carrying Amount of Land 1,623      
Carrying Amount of Buildings and Improvements 4,801      
Accumulated Depreciation $ 585      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2010      
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 $ 7,504      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
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 1,110      
Initial Cost of Buildings & Improvements 5,655      
Cost Capitalized Subsequent to Acquisition 654      
Carrying Amount of Land 1,218      
Carrying Amount of Buildings and Improvements 6,202      
Accumulated Depreciation $ 721      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2010      
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 1,125      
Initial Cost of Buildings & Improvements 5,537      
Cost Capitalized Subsequent to Acquisition 644      
Carrying Amount of Land 1,234      
Carrying Amount of Buildings and Improvements 6,072      
Accumulated Depreciation $ 505      
Year Acquired Jan. 01, 2014      
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 $ 906      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 1995      
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 $ 4,715      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1985      
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 $ 1,288      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1998      
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 118      
Carrying Amount of Land 600      
Carrying Amount of Buildings and Improvements 22,384      
Accumulated Depreciation $ 4,099      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1995      
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 5,182      
Initial Cost of Buildings & Improvements 17,348      
Cost Capitalized Subsequent to Acquisition 2,177      
Carrying Amount of Land 5,682      
Carrying Amount of Buildings and Improvements 19,024      
Accumulated Depreciation $ 2,300      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
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 2,013      
Initial Cost of Buildings & Improvements 6,257      
Cost Capitalized Subsequent to Acquisition 799      
Carrying Amount of Land 2,208      
Carrying Amount of Buildings and Improvements 6,862      
Accumulated Depreciation $ 543      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
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 3,325      
Initial Cost of Buildings & Improvements 8,983      
Cost Capitalized Subsequent to Acquisition 1,189      
Carrying Amount of Land 3,646      
Carrying Amount of Buildings and Improvements 9,850      
Accumulated Depreciation $ 1,147      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
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 1,628      
Initial Cost of Buildings & Improvements 6,263      
Cost Capitalized Subsequent to Acquisition 762      
Carrying Amount of Land 1,786      
Carrying Amount of Buildings and Improvements 6,868      
Accumulated Depreciation $ 530      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
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 2,498      
Initial Cost of Buildings & Improvements 10,436      
Cost Capitalized Subsequent to Acquisition 1,250      
Carrying Amount of Land 2,740      
Carrying Amount of Buildings and Improvements 11,444      
Accumulated Depreciation $ 1,346      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
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 109      
Carrying Amount of Land 4,760      
Carrying Amount of Buildings and Improvements 16,252      
Accumulated Depreciation $ 1,500      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2002      
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 $ 2,468      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2009      
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 $ 2,509      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
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 $ 1,968      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2008      
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 $ 1,788      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2009      
Triple Net [Member] | Olathe, KS, OLA Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,930      
Initial Cost of Buildings & Improvements 19,765      
Cost Capitalized Subsequent to Acquisition 553      
Carrying Amount of Land 1,930      
Carrying Amount of Buildings and Improvements 20,318      
Accumulated Depreciation $ 1,138      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2015      
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 $ 2,096      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
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 8,769      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 380      
Carrying Amount of Buildings and Improvements 8,769      
Accumulated Depreciation $ 1,896      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 980      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2007      
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 $ 1,315      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1996      
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 $ 1,400      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2014      
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 136      
Carrying Amount of Land 50      
Carrying Amount of Buildings and Improvements 1,836      
Accumulated Depreciation $ 119      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
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 126      
Carrying Amount of Land 130      
Carrying Amount of Buildings and Improvements 3,096      
Accumulated Depreciation $ 186      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2003      
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 40      
Carrying Amount of Land 160      
Carrying Amount of Buildings and Improvements 6,630      
Accumulated Depreciation $ 370      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2007      
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 $ 6,190      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2009      
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 $ 7,345      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1988      
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 70      
Carrying Amount of Land 410      
Carrying Amount of Buildings and Improvements 2,910      
Accumulated Depreciation $ 184      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2004      
Triple Net [Member] | Overland Park, KS, OVP6 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 25,311      
Cost Capitalized Subsequent to Acquisition 677      
Carrying Amount of Land 1,300      
Carrying Amount of Buildings and Improvements 25,988      
Accumulated Depreciation $ 1,464      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2015      
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 $ 769      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1996      
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 $ 4,813      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1964      
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 $ 1,059      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1979      
Triple Net [Member] | Oxford, MI, OXF 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 15,791      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,430      
Carrying Amount of Buildings and Improvements 15,791      
Accumulated Depreciation $ 3,172      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2001      
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 $ 1,668      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2005      
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 $ 2,421      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2010      
Triple Net [Member] | Panama City Beach, FL, PCY2 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 6,402      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 6,402      
Accumulated Depreciation $ 981      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
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 57      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 5,667      
Accumulated Depreciation $ 320      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2000      
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 $ 4,057      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2006      
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 $ 3,811      
Year Acquired Jan. 01, 2002      
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 $ 955      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
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 937      
Carrying Amount of Land 1,476      
Carrying Amount of Buildings and Improvements 28,462      
Accumulated Depreciation $ 4,740      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
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 $ 2,340      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
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 $ 2,750      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
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 3,536      
Carrying Amount of Land 2,930      
Carrying Amount of Buildings and Improvements 13,969      
Accumulated Depreciation $ 2,765      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1952      
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 238      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 21,413      
Accumulated Depreciation $ 4,046      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1992      
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 101      
Carrying Amount of Land 300      
Carrying Amount of Buildings and Improvements 8,215      
Accumulated Depreciation $ 1,546      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1905      
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 $ 1,320      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 979      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1997      
Triple Net [Member] | Piscataway, NJ, PTY 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 33,501      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 3,100      
Carrying Amount of Buildings and Improvements 33,501      
Accumulated Depreciation $ 477      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2017      
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 $ 3,096      
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 1,085      
Carrying Amount of Land 3,990      
Carrying Amount of Buildings and Improvements 13,054      
Accumulated Depreciation $ 2,355      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1963      
Triple Net [Member] | Plano, TX, PLO6 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,840      
Initial Cost of Buildings & Improvements 20,152      
Cost Capitalized Subsequent to Acquisition 560      
Carrying Amount of Land 1,840      
Carrying Amount of Buildings and Improvements 20,712      
Accumulated Depreciation $ 968      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2016      
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 $ 1,218      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 330      
Carrying Amount of Land 1,490      
Carrying Amount of Buildings and Improvements 20,320      
Accumulated Depreciation $ 3,862      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1972      
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 1,713      
Carrying Amount of Land 1,810      
Carrying Amount of Buildings and Improvements 32,521      
Accumulated Depreciation $ 5,525      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Prior Lake, MN, PLK Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 14,033      
Initial Cost of Land 1,870      
Initial Cost of Buildings & Improvements 29,849      
Cost Capitalized Subsequent to Acquisition 13      
Carrying Amount of Land 1,870      
Carrying Amount of Buildings and Improvements 29,862      
Accumulated Depreciation $ 1,666      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2003      
Triple Net [Member] | Puyallup, WA, PYL 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 20,776      
Cost Capitalized Subsequent to Acquisition 445      
Carrying Amount of Land 1,156      
Carrying Amount of Buildings and Improvements 21,216      
Accumulated Depreciation $ 5,246      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1985      
Triple Net [Member] | Raleigh, NC, RLH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 7,598      
Initial Cost of Buildings & Improvements 88,870      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 7,598      
Carrying Amount of Buildings and Improvements 88,870      
Accumulated Depreciation $ 1,959      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2017      
Triple Net [Member] | Raleigh, NC, RLH3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 8,253      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
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 $ 2,497      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
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 140      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 20,046      
Accumulated Depreciation $ 3,736      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1994      
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 565      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 21,840      
Accumulated Depreciation $ 3,593      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1997      
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 8,708      
Carrying Amount of Land 977      
Carrying Amount of Buildings and Improvements 32,938      
Accumulated Depreciation $ 5,180      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1999      
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 $ 1,935      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1998      
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 $ 4,148      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1998      
Triple Net [Member] | Richmond, IN, RIC 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 14,222      
Cost Capitalized Subsequent to Acquisition 393      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 14,615      
Accumulated Depreciation $ 813      
Year Acquired Jan. 01, 2016      
Year Built Jan. 01, 2015      
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 $ 1,624      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1989      
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 $ 2,966      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 $ 841      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 1994      
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 181      
Carrying Amount of Land 1,500      
Carrying Amount of Buildings and Improvements 5,016      
Accumulated Depreciation $ 1,248      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1960      
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 868      
Carrying Amount of Land 4,290      
Carrying Amount of Buildings and Improvements 21,178      
Accumulated Depreciation $ 3,656      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2002      
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 2,220      
Initial Cost of Buildings & Improvements 17,650      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,220      
Carrying Amount of Buildings and Improvements 17,650      
Accumulated Depreciation $ 1,131      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2014      
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 $ 2,889      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
Triple Net [Member] | Rohnert Park, CA, ROP 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 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 $ 7,032      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1986      
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 $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1900      
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 67      
Carrying Amount of Land 2,140      
Carrying Amount of Buildings and Improvements 24,746      
Accumulated Depreciation $ 1,391      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1989      
Triple Net [Member] | Roswell, GA, RWL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 7,942      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1999      
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 1,900      
Initial Cost of Buildings & Improvements 10,262      
Cost Capitalized Subsequent to Acquisition 1,175      
Carrying Amount of Land 2,083      
Carrying Amount of Buildings and Improvements 11,253      
Accumulated Depreciation $ 1,387      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2010      
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 $ 1,842      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1988      
Triple Net [Member] | Sacramento, CA, SAC2 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 14,781      
Cost Capitalized Subsequent to Acquisition 251      
Carrying Amount of Land 952      
Carrying Amount of Buildings and Improvements 15,020      
Accumulated Depreciation $ 3,718      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1978      
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 $ 2,585      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1998      
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 $ 2,284      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1997      
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 $ 3,122      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1997      
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 1,052      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 25,741      
Accumulated Depreciation $ 2,358      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
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 $ 7,106      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2007      
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 $ 3,490      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1993      
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 $ 5,472      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1992      
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 92      
Carrying Amount of Land 980      
Carrying Amount of Buildings and Improvements 30,787      
Accumulated Depreciation $ 5,551      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1993      
Triple Net [Member] | Sand Springs, OK, SSG Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 2,832      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
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 $ 1,843      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1995      
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 $ 3,179      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
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 $ 1,533      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2005      
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 $ 1,059      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | Seattle, WA, SEA Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 5,190      
Initial Cost of Buildings & Improvements 9,350      
Cost Capitalized Subsequent to Acquisition 564      
Carrying Amount of Land 5,199      
Carrying Amount of Buildings and Improvements 9,905      
Accumulated Depreciation $ 3,373      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1962      
Triple Net [Member] | Seattle, WA, SEA4 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 27,180      
Initial Cost of Land 10,670      
Initial Cost of Buildings & Improvements 37,291      
Cost Capitalized Subsequent to Acquisition 894      
Carrying Amount of Land 10,700      
Carrying Amount of Buildings and Improvements 38,155      
Accumulated Depreciation $ 11,465      
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 415      
Carrying Amount of Land 769      
Carrying Amount of Buildings and Improvements 26,308      
Accumulated Depreciation $ 4,848      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2008      
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 $ 2,364      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
Triple Net [Member] | Severna Park, MD, SEV 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 31,273      
Cost Capitalized Subsequent to Acquisition 808      
Carrying Amount of Land 2,120      
Carrying Amount of Buildings and Improvements 32,081      
Accumulated Depreciation $ 5,756      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1981      
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 $ 804      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1995      
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 $ 1,474      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1965      
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 $ 1,555      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 2006      
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 1,080      
Carrying Amount of Land 2,128      
Carrying Amount of Buildings and Improvements 39,188      
Accumulated Depreciation $ 7,156      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
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 $ 3,247      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2005      
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 1,357      
Initial Cost of Buildings & Improvements 6,539      
Cost Capitalized Subsequent to Acquisition 763      
Carrying Amount of Land 1,488      
Carrying Amount of Buildings and Improvements 7,170      
Accumulated Depreciation $ 573      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1997      
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 $ 2,228      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1998      
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 $ 715      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Triple Net [Member] | Sonoma, CA, SON 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 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 $ 6,758      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1988      
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 $ 1,604      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2014      
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 $ 3,652      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 1961      
Triple Net [Member] | Southampton, UKJ, SOH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,612      
Initial Cost of Buildings & Improvements 16,803      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,612      
Carrying Amount of Buildings and Improvements 16,803      
Accumulated Depreciation $ 114      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2013      
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 $ 4,300      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
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 $ 1,682      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2010      
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 $ 1,292      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Triple Net [Member] | St. Louis, MO, STL3 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 12,390      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,890      
Carrying Amount of Buildings and Improvements 12,390      
Accumulated Depreciation $ 2,354      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1963      
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 78      
Carrying Amount of Land 2,100      
Carrying Amount of Buildings and Improvements 33,097      
Accumulated Depreciation $ 1,843      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
Triple Net [Member] | Stafford, UKG, SAF Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,131      
Initial Cost of Buildings & Improvements 8,739      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 2,131      
Carrying Amount of Buildings and Improvements 8,739      
Accumulated Depreciation $ 294      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2016      
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 1,820      
Initial Cost of Buildings & Improvements 3,238      
Cost Capitalized Subsequent to Acquisition 489      
Carrying Amount of Land 1,996      
Carrying Amount of Buildings and Improvements 3,551      
Accumulated Depreciation $ 303      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
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 $ 710      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1990      
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 $ 2,365      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
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 $ 1,416      
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 $ 806      
Year Acquired Jan. 01, 1995      
Year Built Jan. 01, 1995      
Triple Net [Member] | Stockton, CA, STT 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 5,983      
Cost Capitalized Subsequent to Acquisition 397      
Carrying Amount of Land 2,372      
Carrying Amount of Buildings and Improvements 6,288      
Accumulated Depreciation $ 1,821      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1988      
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 790      
Initial Cost of Buildings & Improvements 14,508      
Cost Capitalized Subsequent to Acquisition 1,478      
Carrying Amount of Land 866      
Carrying Amount of Buildings and Improvements 15,910      
Accumulated Depreciation $ 1,123      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2012      
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 $ 1,573      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2011      
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 $ 2,633      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Sunninghill, UKJ, SGH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 12,338      
Initial Cost of Buildings & Improvements 44,799      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 12,338      
Carrying Amount of Buildings and Improvements 44,799      
Accumulated Depreciation $ 600      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2017      
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 $ 2,361      
Year Acquired Jan. 01, 2009      
Year Built Jan. 01, 2010      
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 $ 2,392      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1950      
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 $ 1,408      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
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 $ 781      
Year Acquired Jan. 01, 1996      
Year Built Jan. 01, 1996      
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 $ 878      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2014      
Triple Net [Member] | Thomasville, GA, THO 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 12,520      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 530      
Carrying Amount of Buildings and Improvements 12,520      
Accumulated Depreciation $ 1,757      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
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 840      
Carrying Amount of Land 1,050      
Carrying Amount of Buildings and Improvements 14,140      
Accumulated Depreciation $ 2,438      
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 865      
Carrying Amount of Land 1,679      
Carrying Amount of Buildings and Improvements 35,423      
Accumulated Depreciation $ 6,545      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2005      
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 72      
Carrying Amount of Land 310      
Carrying Amount of Buildings and Improvements 3,762      
Accumulated Depreciation $ 234      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2009      
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 $ 1,892      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2011      
Triple Net [Member] | Towson, MD, TWS2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,180      
Initial Cost of Buildings & Improvements 13,280      
Cost Capitalized Subsequent to Acquisition 195      
Carrying Amount of Land 1,180      
Carrying Amount of Buildings and Improvements 13,475      
Accumulated Depreciation $ 2,589      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1973      
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 $ 2,009      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1997      
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 $ 6,074      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 1971      
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 $ 7,703      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2001      
Triple Net [Member] | Tulsa, OK, 21168101 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 $ 3,432      
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 1,102      
Carrying Amount of Land 1,390      
Carrying Amount of Buildings and Improvements 8,212      
Accumulated Depreciation $ 1,708      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
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 $ 1,529      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Tulsa, OK, TUL6 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 27,007      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,100      
Carrying Amount of Buildings and Improvements 27,007      
Accumulated Depreciation $ 597      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2017      
Triple Net [Member] | Tulsa, OK, TUL7 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,000      
Initial Cost of Land 1,752      
Initial Cost of Buildings & Improvements 28,421      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,752      
Carrying Amount of Buildings and Improvements 28,421      
Accumulated Depreciation $ 407      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2014      
Triple Net [Member] | Tulsa, OK, TUL8 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 9,410      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 9,410      
Accumulated Depreciation $ 44      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2009      
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 $ 1,509      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 1,900      
Initial Cost of Buildings & Improvements 28,195      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,900      
Carrying Amount of Buildings and Improvements 28,195      
Accumulated Depreciation $ 1,968      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2015      
Triple Net [Member] | Vacaville, CA, VAC 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 17,100      
Cost Capitalized Subsequent to Acquisition 1,651      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 18,751      
Accumulated Depreciation $ 6,462      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1987      
Triple Net [Member] | Vallejo, CA, VLE Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,000      
Initial Cost of Buildings & Improvements 18,000      
Cost Capitalized Subsequent to Acquisition 2,344      
Carrying Amount of Land 4,030      
Carrying Amount of Buildings and Improvements 20,315      
Accumulated Depreciation $ 6,950      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1989      
Triple Net [Member] | Vallejo, CA, VLE2 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 15,407      
Cost Capitalized Subsequent to Acquisition 310      
Carrying Amount of Land 2,330      
Carrying Amount of Buildings and Improvements 15,717      
Accumulated Depreciation $ 4,110      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1990      
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 $ 1,146      
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 $ 1,309      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1999      
Triple Net [Member] | Vancouver, WA, VCR 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 19,042      
Cost Capitalized Subsequent to Acquisition 270      
Carrying Amount of Land 1,821      
Carrying Amount of Buildings and Improvements 19,311      
Accumulated Depreciation $ 4,822      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2006      
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 $ 2,415      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 2009      
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 $ 1,398      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1999      
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 $ 1,441      
Year Acquired Jan. 01, 2001      
Year Built Jan. 01, 1996      
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 $ 1,996      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1993      
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 671      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 37,970      
Accumulated Depreciation $ 7,042      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1965      
Triple Net [Member] | Voorhees, NJ, VRH4 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 26,040      
Cost Capitalized Subsequent to Acquisition 894      
Carrying Amount of Land 1,900      
Carrying Amount of Buildings and Improvements 26,934      
Accumulated Depreciation $ 5,017      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1985      
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 26      
Carrying Amount of Land 3,100      
Carrying Amount of Buildings and Improvements 25,976      
Accumulated Depreciation $ 3,724      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
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 1,631      
Carrying Amount of Land 3,847      
Carrying Amount of Buildings and Improvements 25,796      
Accumulated Depreciation $ 3,228      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2013      
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 $ 1,381      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 3,073      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
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 $ 2,197      
Year Acquired Jan. 01, 1998      
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 2,499      
Carrying Amount of Land 1,692      
Carrying Amount of Buildings and Improvements 27,807      
Accumulated Depreciation $ 4,554      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2003      
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 1,184      
Initial Cost of Buildings & Improvements 8,562      
Cost Capitalized Subsequent to Acquisition 942      
Carrying Amount of Land 1,299      
Carrying Amount of Buildings and Improvements 9,389      
Accumulated Depreciation $ 702      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
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 55      
Carrying Amount of Land 40      
Carrying Amount of Buildings and Improvements 2,565      
Accumulated Depreciation $ 149      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1996      
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 $ 5,255      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 1989      
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 1,014      
Carrying Amount of Land 2,000      
Carrying Amount of Buildings and Improvements 31,824      
Accumulated Depreciation $ 5,165      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1999      
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 1,138      
Carrying Amount of Land 1,991      
Carrying Amount of Buildings and Improvements 25,947      
Accumulated Depreciation $ 4,363      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2000      
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 $ 4,544      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2007      
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 $ 1,521      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2008      
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 $ 1,519      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2007      
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 1,480      
Initial Cost of Buildings & Improvements 5,724      
Cost Capitalized Subsequent to Acquisition 696      
Carrying Amount of Land 1,623      
Carrying Amount of Buildings and Improvements 6,277      
Accumulated Depreciation $ 538      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 2015      
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 $ 2,837      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2011      
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 260      
Carrying Amount of Land 1,350      
Carrying Amount of Buildings and Improvements 29,497      
Accumulated Depreciation $ 5,462      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1974      
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 187      
Carrying Amount of Land 2,280      
Carrying Amount of Buildings and Improvements 10,874      
Accumulated Depreciation $ 2,249      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1963      
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 $ 9,171      
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 $ 0      
Initial Cost of Land 890      
Initial Cost of Buildings & Improvements 15,964      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 890      
Carrying Amount of Buildings and Improvements 15,964      
Accumulated Depreciation $ 1,499      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 3,481      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1970      
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 2,517      
Initial Cost of Buildings & Improvements 7,054      
Cost Capitalized Subsequent to Acquisition 925      
Carrying Amount of Land 2,760      
Carrying Amount of Buildings and Improvements 7,736      
Accumulated Depreciation $ 905      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
Triple Net [Member] | White Lake, MI, WTL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
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 $ 3,951      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
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 $ 4,399      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1997      
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 $ 1,527      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Triple Net [Member] | Wichita, KS, WTA3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 13,001      
Initial Cost of Land 627      
Initial Cost of Buildings & Improvements 19,748      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 629      
Carrying Amount of Buildings and Improvements 19,752      
Accumulated Depreciation $ 2,810      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2009      
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 114      
Carrying Amount of Land 260      
Carrying Amount of Buildings and Improvements 2,354      
Accumulated Depreciation $ 137      
Year Acquired Jan. 01, 2015      
Year Built Jan. 01, 1992      
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 900      
Initial Cost of Buildings & Improvements 10,134      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 900      
Carrying Amount of Buildings and Improvements 10,134      
Accumulated Depreciation $ 1,646      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
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 $ 2,352      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1987      
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 114      
Carrying Amount of Land 800      
Carrying Amount of Buildings and Improvements 9,608      
Accumulated Depreciation $ 1,906      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1970      
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 $ 1,489      
Year Acquired Jan. 01, 1999      
Year Built Jan. 01, 1999      
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 $ 1,401      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2012      
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 1,855      
Carrying Amount of Land 2,250      
Carrying Amount of Buildings and Improvements 10,394      
Accumulated Depreciation $ 2,104      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1969      
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 970      
Carrying Amount of Land 1,800      
Carrying Amount of Buildings and Improvements 1,570      
Accumulated Depreciation $ 470      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1974      
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 $ 1,199      
Year Acquired Jan. 01, 2003      
Year Built Jan. 01, 1996      
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 1,110      
Initial Cost of Buildings & Improvements 7,937      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,110      
Carrying Amount of Buildings and Improvements 7,937      
Accumulated Depreciation $ 1,145      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2013      
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 944      
Initial Cost of Buildings & Improvements 6,915      
Cost Capitalized Subsequent to Acquisition 759      
Carrying Amount of Land 1,035      
Carrying Amount of Buildings and Improvements 7,583      
Accumulated Depreciation $ 888      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2009      
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 1,573      
Initial Cost of Buildings & Improvements 6,678      
Cost Capitalized Subsequent to Acquisition 797      
Carrying Amount of Land 1,725      
Carrying Amount of Buildings and Improvements 7,323      
Accumulated Depreciation $ 865      
Year Acquired Jan. 01, 2013      
Year Built Jan. 01, 2011      
Triple Net [Member] | Woodbury, MN, WDY Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,317      
Initial Cost of Buildings & Improvements 20,935      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 1,317      
Carrying Amount of Buildings and Improvements 20,935      
Accumulated Depreciation $ 454      
Year Acquired Jan. 01, 2017      
Year Built Jan. 01, 2015      
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 $ 11,586      
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 6,000      
Carrying Amount of Land 2,300      
Carrying Amount of Buildings and Improvements 15,060      
Accumulated Depreciation $ 3,152      
Year Acquired Jan. 01, 2008      
Year Built Jan. 01, 1993      
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 274      
Carrying Amount of Land 2,700      
Carrying Amount of Buildings and Improvements 22,518      
Accumulated Depreciation $ 4,282      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1960      
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 2,961      
Initial Cost of Buildings & Improvements 8,266      
Cost Capitalized Subsequent to Acquisition 1,085      
Carrying Amount of Land 3,247      
Carrying Amount of Buildings and Improvements 9,064      
Accumulated Depreciation $ 758      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2006      
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 $ 950      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
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 $ 4,523      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
[1]
Please see Note 2 to our consolidated financial statements for information regarding lives used for depreciation and amortization.