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Real Estate and Accumulated Depreciation (Schedule III Real Estate and Accumulated Depreciation, Held-for-sale) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 3,461,527      
Initial Cost of Land 2,507,281      
Initial Cost of Buildings & Improvements 25,667,979      
Cost Capitalized Subsequent to Acquisition 2,049,147      
Carrying Amount of Land 2,591,071      
Carrying Amount of Buildings and Improvements 27,449,987      
Accumulated Depreciation 4,093,494 [1] $ 3,796,297 $ 3,020,908 $ 2,386,658
Assets Held-for-sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 4,032      
Initial Cost of Land 112,022      
Initial Cost of Buildings & Improvements 1,044,065      
Cost Capitalized Subsequent to Acquisition 72,126      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 1,044,859      
Accumulated Depreciation [1] 0      
Akron, OH, AKR2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances 0      
Initial Cost of Land 630      
Initial Cost of Buildings & Improvements 7,535      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,212      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1915      
Akron, OH, AKR Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 290      
Initial Cost of Buildings & Improvements 8,219      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,260      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1961      
Alliance, OH, ALI Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 270      
Initial Cost of Buildings & Improvements 7,723      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 5,764      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1982      
Aventura, FL, AVT Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,540      
Initial Cost of Buildings & Improvements 33,986      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 35,599      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Baltic, OH, BTC Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 50      
Initial Cost of Buildings & Improvements 8,709      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,339      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1983      
Bellingham, MA, BLH Held for Sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 9,270      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 1,372      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1900      
Boca Raton, FL, BOR2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,440      
Initial Cost of Buildings & Improvements 31,048      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 30,214      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1989      
Boonville, IN, WOD Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 190      
Initial Cost of Buildings & Improvements 5,510      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 3,492      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2000      
Chicago, IL, CHI2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,800      
Initial Cost of Buildings & Improvements 19,256      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 18,878      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2005      
Chicago, IL, CHI3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,900      
Initial Cost of Buildings & Improvements 17,016      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 17,840      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2007      
Columbus, OH, COL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 5,170      
Cost Capitalized Subsequent to Acquisition 4,434      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,134      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1968      
Columbus, OH, COL2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 5,022      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,386      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1983      
Columbus, OH, COL3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,010      
Initial Cost of Buildings & Improvements 4,931      
Cost Capitalized Subsequent to Acquisition 8,418      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 14,359      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1978      
Columbus, IN, SLO Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 530      
Initial Cost of Buildings & Improvements 6,710      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,703      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2002      
Year Built Jan. 01, 2001      
Columbus, OH, 1353 Held for Sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 7,023      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 7,023      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1994      
Conyers, GA, CYR Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,740      
Initial Cost of Buildings & Improvements 19,302      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 20,186      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Cortland, NY, CRT Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 700      
Initial Cost of Buildings & Improvements 18,041      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 16,935      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
El Paso, TX, ELP8 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,420      
Initial Cost of Buildings & Improvements 12,394      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 13,347      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1999      
Fayetteville, GA, FYV Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 560      
Initial Cost of Buildings & Improvements 12,665      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 12,165      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1994      
Fredericksburg, VA, FRD5 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,700      
Initial Cost of Buildings & Improvements 22,016      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 23,684      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1992      
Germantown, TN, 1102 Held for Sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,049      
Initial Cost of Buildings & Improvements 12,456      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 12,202      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 2002      
Greendale, WI, GND Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,060      
Initial Cost of Buildings & Improvements 35,383      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 33,762      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1988      
Hanover, IN, HVR Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 210      
Initial Cost of Buildings & Improvements 4,430      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 3,025      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2004      
Year Built Jan. 01, 2000      
Hattiesburg, MS, HAT2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 11,863      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 11,863      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2009      
Hemet, CA, HEM2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,890      
Initial Cost of Buildings & Improvements 28,606      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 22,635      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1989      
Hemet, CA, HEM3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 430      
Initial Cost of Buildings & Improvements 9,630      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 8,993      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1988      
Hermitage, TN, HRM Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 10,121      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,121      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Hollywood, FL, HLY Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,240      
Initial Cost of Buildings & Improvements 13,806      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 14,106      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Houston, TX, HOU7 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 5,090      
Initial Cost of Buildings & Improvements 9,471      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 8,503      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 2009      
Huron, OH, HUR Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 160      
Initial Cost of Buildings & Improvements 6,088      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 5,566      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2005      
Year Built Jan. 01, 1983      
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 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 32,201      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Jacksonville Beach, FL, JKB Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,210      
Initial Cost of Buildings & Improvements 26,207      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 25,088      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Jefferson, OH, JEF Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 80      
Initial Cost of Buildings & Improvements 9,120      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,402      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1984      
Jupiter, FL, JUP3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,100      
Initial Cost of Buildings & Improvements 47,453      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 46,458      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
Kennesaw, GA, KNW Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 940      
Initial Cost of Buildings & Improvements 10,848      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,943      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Kennewick, WA, KNK Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,820      
Initial Cost of Buildings & Improvements 27,991      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 23,390      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1994      
Lake Barrington, IL, LKB Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,400      
Initial Cost of Buildings & Improvements 66,179      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 63,190      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2000      
Lancaster, NH, LCT2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 160      
Initial Cost of Buildings & Improvements 434      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 493      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1905      
Lexington, KY, LEX Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,980      
Initial Cost of Buildings & Improvements 21,258      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 21,928      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 2013      
Loganville, GA, LOG Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,430      
Initial Cost of Buildings & Improvements 22,912      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 22,257      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1997      
Marietta, GA, MRA Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,270      
Initial Cost of Buildings & Improvements 10,519      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 11,054      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1997      
Monclova, OH, MNC Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,750      
Initial Cost of Buildings & Improvements 11,868      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 12,230      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2013      
Monroe, WA, MON Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,560      
Initial Cost of Buildings & Improvements 34,460      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 29,936      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1994      
Morrow, GA, 1192 Held for Sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 818      
Initial Cost of Buildings & Improvements 8,064      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 5,913      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1990      
Naples, FL, NPL Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,716      
Initial Cost of Buildings & Improvements 17,306      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,055      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 1997      
Year Built Jan. 01, 1999      
Olympia, WA, OLM 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 16,689      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 13,830      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1995      
Orange Village, OH, 1171 Held for Sale [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 610      
Initial Cost of Buildings & Improvements 7,419      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,096      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2007      
Year Built Jan. 01, 1985      
Palm Springs, FL, 1142 Outpatient Medical [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 739      
Initial Cost of Buildings & Improvements 4,066      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 2,061      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1993      
Palm Springs, FL, 1152 Outpatient Medical [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,182      
Initial Cost of Buildings & Improvements 7,765      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 3,062      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1997      
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 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 6,367      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,367      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2005      
Plano, TX, PLO4 Senior Housing Operating [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 4,032      
Initial Cost of Land 840      
Initial Cost of Buildings & Improvements 8,538      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 2,499      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 1996      
San Ramon, CA, SAR 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 17,488      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 16,188      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1989      
Sarasota, FL, SRS7 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 950      
Initial Cost of Buildings & Improvements 8,825      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 9,314      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1998      
Sarasota, FL, SRS6 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,120      
Initial Cost of Buildings & Improvements 12,489      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 12,360      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1999      
Sarasota, FL, SRS8 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 880      
Initial Cost of Buildings & Improvements 9,854      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 9,998      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 1990      
Seattle, WA, SEA2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,420      
Initial Cost of Buildings & Improvements 15,555      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 15,455      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2000      
Seattle, WA, SEA3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,630      
Initial Cost of Buildings & Improvements 10,257      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,996      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 2003      
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 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 12,522      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 12,522      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1963      
Stanwood, WA, STA Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,260      
Initial Cost of Buildings & Improvements 28,474      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 24,648      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1998      
Thomasville, GA, THO Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 0      
Initial Cost of Buildings & Improvements 0      
Cost Capitalized Subsequent to Acquisition 11,378      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 11,378      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2006      
Uhrichsville, OH, UCH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 24      
Initial Cost of Buildings & Improvements 6,716      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,763      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1977      
Victoria, BC, VTA Senior Housing Operating [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 2,674      
Initial Cost of Buildings & Improvements 14,218      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 13,876      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
Webster, NY, WBT Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 800      
Initial Cost of Buildings & Improvements 8,968      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 8,847      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Webster, NY, WBT2 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,300      
Initial Cost of Buildings & Improvements 21,127      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 20,295      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2001      
Webster Groves, MO, WBG Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,790      
Initial Cost of Buildings & Improvements 15,425      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 15,642      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
West Chester, PA, WEC4 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 3,290      
Initial Cost of Buildings & Improvements 42,258      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 41,176      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2000      
West Chester, PA, WEC5 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 600      
Initial Cost of Buildings & Improvements 11,894      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 11,065      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2012      
Year Built Jan. 01, 2002      
West Worthington, OH, WWO Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 510      
Initial Cost of Buildings & Improvements 5,090      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 4,046      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2006      
Year Built Jan. 01, 1980      
Whittier, CA, WHT Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 4,470      
Initial Cost of Buildings & Improvements 22,151      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 20,590      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2010      
Year Built Jan. 01, 1988      
Wichita Falls, TX, WCH3 Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 1,070      
Initial Cost of Buildings & Improvements 26,167      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 25,898      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1998      
Willard, OH, WLD Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 730      
Initial Cost of Buildings & Improvements 6,447      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 6,317      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2011      
Year Built Jan. 01, 2012      
Winter Haven, FL, WNH Senior Housing Triple Net [Member]        
Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost of Encumbrances $ 0      
Initial Cost of Land 710      
Initial Cost of Buildings & Improvements 10,038      
Cost Capitalized Subsequent to Acquisition 0      
Carrying Amount of Land 0      
Carrying Amount of Buildings and Improvements 10,364      
Accumulated Depreciation [1] $ 0      
Year Acquired Jan. 01, 2014      
Year Built Jan. 01, 1979      
[1]
Please see Note 2 to our consolidated financial statements for information regarding lives used for depreciation and amortization.