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Schedule III - Real Estate Investments and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial costs, land $ 544,228      
Initial costs, buildings 4,026,620      
Additions subsequent to acquisition, Improvements 188,640      
Additions subsequent to acquisition, carrying costs 21,661      
Land at cost 547,894      
Buildings at cost 4,233,255      
Total at cost 4,781,149 $ 5,438,148 [1] $ 3,968,042 $ 2,991,590
Accumulated Depreciation 414,331 $ 406,855    
Encumbrances $ 0      
2008 [Member] | Bath, UK [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,512      
Initial costs, buildings 31,334      
Land at cost 1,512      
Buildings at cost 31,334      
Total at cost 32,846      
Accumulated Depreciation 3,526      
Encumbrances $ 0      
Date of Construction 2008      
Date Acquired Jul. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2008 [Member] | Boise, ID [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 1,558      
Initial costs, buildings 11,027      
Land at cost 1,558      
Buildings at cost 11,027      
Total at cost 12,585      
Accumulated Depreciation 173      
Encumbrances $ 0      
Date of Construction 2008      
Date Acquired Feb. 29, 2012      
Life on which depreciation in latest income statements is computed (Years) 50 years      
2008 [Member] | Lubbock, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,376      
Initial costs, buildings 28,292      
Additions subsequent to acquisition, Improvements 3,648      
Land at cost 1,376      
Buildings at cost 31,940      
Total at cost 33,316      
Accumulated Depreciation 2,657      
Encumbrances $ 0      
Date of Construction 2008      
Date Acquired Jun. 16, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2009 [Member] | Bath, UK [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,512      
Initial costs, buildings 31,334      
Land at cost 1,512      
Buildings at cost 31,334      
Total at cost 32,846      
Accumulated Depreciation 3,526      
Encumbrances $ 0      
Date of Construction 2009      
Date Acquired Jul. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2009 [Member] | Brighton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 18,540      
Initial costs, buildings 146,490      
Additions subsequent to acquisition, Improvements 11,176      
Land at cost 18,540      
Buildings at cost 157,666      
Total at cost 176,206      
Accumulated Depreciation 8,304      
Encumbrances $ 0      
Date of Construction 2009      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1977 [Member] | Braunfels, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,202      
Initial costs, buildings 14,073      
Additions subsequent to acquisition, Improvements 57      
Land at cost 2,259      
Buildings at cost 14,073      
Total at cost 16,332      
Accumulated Depreciation 1,245      
Encumbrances $ 0      
Date of Construction 1977      
Date Acquired Jun. 30, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1885 [Member] | Heidelberg, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 6,404      
Initial costs, buildings 37,006      
Additions subsequent to acquisition, Improvements 75      
Land at cost 6,479      
Buildings at cost 37,006      
Total at cost 43,485      
Accumulated Depreciation 2,325      
Encumbrances $ 0      
Date of Construction 1885      
Date Acquired Jun. 22, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1991 [Member] | Heidelberg, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 6,404      
Initial costs, buildings 37,006      
Additions subsequent to acquisition, Improvements 75      
Land at cost 6,479      
Buildings at cost 37,006      
Total at cost 43,485      
Accumulated Depreciation 2,325      
Encumbrances $ 0      
Date of Construction 1991      
Date Acquired Jun. 22, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2011 [Member] | Cologne, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,494      
Initial costs, buildings 15,545      
Additions subsequent to acquisition, Improvements 104      
Land at cost 4,598      
Buildings at cost 15,545      
Total at cost 20,143      
Accumulated Depreciation 593      
Encumbrances $ 0      
Date of Construction 2011      
Date Acquired Jun. 23, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2011 [Member] | Methuen, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 23,809      
Initial costs, buildings 89,505      
Additions subsequent to acquisition, Improvements 5,698      
Land at cost 23,809      
Buildings at cost 95,203      
Total at cost 119,012      
Accumulated Depreciation 5,766      
Encumbrances $ 0      
Date of Construction 2011      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1974 [Member] | Bad Salzuflen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 9,972      
Initial costs, buildings 27,611      
Additions subsequent to acquisition, Improvements 939      
Land at cost 10,911      
Buildings at cost 27,611      
Total at cost 38,522      
Accumulated Depreciation 816      
Encumbrances $ 0      
Date of Construction 1974      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1974 [Member] | Redding, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,555      
Initial costs, buildings 53,863      
Additions subsequent to acquisition, carrying costs 13      
Land at cost 1,555      
Buildings at cost 53,876      
Total at cost 55,431      
Accumulated Depreciation 15,387      
Encumbrances $ 0      
Date of Construction 1974      
Date Acquired Aug. 10, 2007      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1974 [Member] | Sebastian, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,733      
Initial costs, buildings 49,136      
Additions subsequent to acquisition, Improvements 16,829      
Land at cost 5,733      
Buildings at cost 65,965      
Total at cost 71,698      
Accumulated Depreciation 2,288      
Encumbrances $ 0      
Date of Construction 1974      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2016 [Member] | Bad Salzuflen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 9,972      
Initial costs, buildings 27,611      
Additions subsequent to acquisition, Improvements 939      
Land at cost 10,911      
Buildings at cost 27,611      
Total at cost 38,522      
Accumulated Depreciation 816      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 950      
Initial costs, buildings 3,996      
Land at cost 950      
Buildings at cost 3,996      
Total at cost 4,946      
Accumulated Depreciation 225      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Sep. 26, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Glendale, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,144      
Initial costs, buildings 6,087      
Land at cost 1,144      
Buildings at cost 6,087      
Total at cost 7,231      
Accumulated Depreciation 330      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Oct. 21, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | New Orleans, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 2,850      
Initial costs, buildings 6,125      
Land at cost 2,850      
Buildings at cost 6,125      
Total at cost 8,975      
Accumulated Depreciation 346      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Sep. 23, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Katy, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,174      
Buildings at cost 4,174      
Total at cost 4,174      
Accumulated Depreciation 235      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Oct. 10, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | The Woodlands, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,524      
Buildings at cost 4,524      
Total at cost 4,524      
Accumulated Depreciation 311      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Mar. 28, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | DeSoto, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 750      
Initial costs, buildings 4,234      
Land at cost 750      
Buildings at cost 4,234      
Total at cost 4,984      
Accumulated Depreciation 273      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired May 23, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,801      
Buildings at cost 4,801      
Total at cost 4,801      
Accumulated Depreciation 250      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Dec. 09, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Flagstaff, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 3,049      
Initial costs, buildings 22,464      
Land at cost 3,049      
Buildings at cost 22,464      
Total at cost 25,513      
Accumulated Depreciation 468      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Aug. 23, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Frisco, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 1,806      
Buildings at cost 1,806      
Total at cost 1,806      
Accumulated Depreciation 336      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Mar. 04, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Garland, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,647      
Buildings at cost 4,647      
Total at cost 4,647      
Accumulated Depreciation 252      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Nov. 15, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Goodyear, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,800      
Initial costs, buildings 4,713      
Land at cost 1,800      
Buildings at cost 4,713      
Total at cost 6,513      
Accumulated Depreciation 324      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Apr. 04, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Helotes, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,900      
Initial costs, buildings 5,115      
Land at cost 1,900      
Buildings at cost 5,115      
Total at cost 7,015      
Accumulated Depreciation 362      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Mar. 10, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Highlands Ranch, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 4,200      
Initial costs, buildings 4,779      
Land at cost 4,200      
Buildings at cost 4,779      
Total at cost 8,979      
Accumulated Depreciation 289      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Jul. 25, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Longmont, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,181      
Buildings at cost 4,181      
Total at cost 4,181      
Accumulated Depreciation 305      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Feb. 10, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Mandeville, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 2,800      
Initial costs, buildings 5,370      
Land at cost 2,800      
Buildings at cost 5,370      
Total at cost 8,170      
Accumulated Depreciation 291      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Oct. 28, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Marrero, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 5,801      
Buildings at cost 5,801      
Total at cost 5,801      
Accumulated Depreciation 364      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Jul. 15, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Plano, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 2,492      
Buildings at cost 2,492      
Total at cost 2,492      
Accumulated Depreciation 272      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Sep. 30, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,253      
Buildings at cost 4,253      
Total at cost 4,253      
Accumulated Depreciation 230      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Oct. 27, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Rosenberg, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,505      
Buildings at cost 4,505      
Total at cost 4,505      
Accumulated Depreciation 338      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Jan. 15, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 [Member] | Columbus, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,726      
Land at cost 1,726      
Total at cost 1,726      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Aug. 30, 2016      
2016 [Member] | Toledo, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, buildings $ 17,740      
Buildings at cost 17,740      
Total at cost 17,740      
Accumulated Depreciation 1,220      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Apr. 01, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1989 [Member] | Bad Salzuflen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 7,062      
Initial costs, buildings 24,283      
Additions subsequent to acquisition, Improvements 353      
Land at cost 7,415      
Buildings at cost 24,283      
Total at cost 31,698      
Accumulated Depreciation 683      
Encumbrances $ 0      
Date of Construction 1989      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 One [Member] | Bad Salzuflen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 7,062      
Initial costs, buildings 24,283      
Additions subsequent to acquisition, Improvements 353      
Land at cost 7,415      
Buildings at cost 24,283      
Total at cost 31,698      
Accumulated Depreciation 683      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2016 One [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,047      
Initial costs, buildings 36,862      
Land at cost 4,047      
Buildings at cost 36,862      
Total at cost 40,909      
Accumulated Depreciation 2,304      
Encumbrances $ 0      
Date of Construction 2016      
Date Acquired Jul. 07, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1960 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,501      
Initial costs, buildings 34,530      
Additions subsequent to acquisition, Improvements 8,477      
Additions subsequent to acquisition, carrying costs 16,589      
Land at cost 3,274      
Buildings at cost 59,823      
Total at cost 63,097      
Accumulated Depreciation 12,943      
Encumbrances $ 0      
Date of Construction 1960      
Date Acquired Aug. 10, 2007      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1960 [Member] | Sherman, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,493      
Initial costs, buildings 11,081      
Land at cost 4,493      
Buildings at cost 11,081      
Total at cost 15,574      
Accumulated Depreciation 2,703      
Encumbrances $ 0      
Date of Construction 1960      
Date Acquired Oct. 31, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1973 [Member] | Bad Oeynhausen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,042      
Initial costs, buildings 2,859      
Additions subsequent to acquisition, Improvements 127      
Land at cost 1,169      
Buildings at cost 2,859      
Total at cost 4,028      
Accumulated Depreciation 87      
Encumbrances $ 0      
Date of Construction 1973      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1973 [Member] | San Diego, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 12,663      
Initial costs, buildings 52,431      
Land at cost 12,663      
Buildings at cost 52,431      
Total at cost 65,094      
Accumulated Depreciation 10,377      
Encumbrances $ 0      
Date of Construction 1973      
Date Acquired Feb. 09, 2011      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1973 [Member] | Odessa, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,535      
Initial costs, buildings 123,518      
Additions subsequent to acquisition, Improvements 254      
Land at cost 6,535      
Buildings at cost 123,772      
Total at cost 130,307      
Accumulated Depreciation 3,950      
Encumbrances $ 0      
Date of Construction 1973      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1973 [Member] | Port Huron, MI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,029      
Initial costs, buildings 14,622      
Land at cost 3,029      
Buildings at cost 14,622      
Total at cost 17,651      
Accumulated Depreciation 1,498      
Encumbrances $ 0      
Date of Construction 1973      
Date Acquired Dec. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 30 years      
2010 [Member] | Bad Oeynhausen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,042      
Initial costs, buildings 2,859      
Additions subsequent to acquisition, Improvements 127      
Land at cost 1,169      
Buildings at cost 2,859      
Total at cost 4,028      
Accumulated Depreciation 87      
Encumbrances $ 0      
Date of Construction 2010      
Date Acquired Nov. 30, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2010 [Member] | Brockton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 18,328      
Initial costs, buildings 67,248      
Additions subsequent to acquisition, Improvements 4,296      
Land at cost 18,328      
Buildings at cost 71,544      
Total at cost 89,872      
Accumulated Depreciation 4,798      
Encumbrances $ 0      
Date of Construction 2010      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2010 [Member] | Sherman, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,493      
Initial costs, buildings 11,081      
Land at cost 4,493      
Buildings at cost 11,081      
Total at cost 15,574      
Accumulated Depreciation 2,703      
Encumbrances $ 0      
Date of Construction 2010      
Date Acquired Oct. 31, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1993 [Member] | Dormagen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,843      
Initial costs, buildings 5,848      
Additions subsequent to acquisition, Improvements 140      
Land at cost 1,983      
Buildings at cost 5,848      
Total at cost 7,831      
Accumulated Depreciation 52      
Encumbrances $ 0      
Date of Construction 1993      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2006 [Member] | Dormagen, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,843      
Initial costs, buildings 5,848      
Additions subsequent to acquisition, Improvements 140      
Land at cost 1,983      
Buildings at cost 5,848      
Total at cost 7,831      
Accumulated Depreciation 52      
Encumbrances $ 0      
Date of Construction 2006      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2006 [Member] | Dallas, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 1,000      
Initial costs, buildings 13,589      
Additions subsequent to acquisition, carrying costs 368      
Land at cost 1,421      
Buildings at cost 13,536      
Total at cost 14,957      
Accumulated Depreciation 4,173      
Encumbrances $ 0      
Date of Construction 2006      
Date Acquired Sep. 05, 2006      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2006 [Member] | Bloomington, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,392      
Initial costs, buildings 28,212      
Additions subsequent to acquisition, Improvements 5,000      
Additions subsequent to acquisition, carrying costs 408      
Land at cost 2,392      
Buildings at cost 33,620      
Total at cost 36,012      
Accumulated Depreciation 10,377      
Encumbrances $ 0      
Date of Construction 2006      
Date Acquired Aug. 08, 2006      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2006 [Member] | Petersburg, VA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,302      
Initial costs, buildings 9,121      
Land at cost 1,302      
Buildings at cost 9,121      
Total at cost 10,423      
Accumulated Depreciation 2,394      
Encumbrances $ 0      
Date of Construction 2006      
Date Acquired Jul. 01, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1886 [Member] | Grefath, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,145      
Initial costs, buildings 3,127      
Additions subsequent to acquisition, Improvements 102      
Land at cost 1,247      
Buildings at cost 3,127      
Total at cost 4,374      
Accumulated Depreciation 28      
Encumbrances $ 0      
Date of Construction 1886      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1983 [Member] | Grefath, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,145      
Initial costs, buildings 3,127      
Additions subsequent to acquisition, Improvements 102      
Land at cost 1,247      
Buildings at cost 3,127      
Total at cost 4,374      
Accumulated Depreciation 28      
Encumbrances $ 0      
Date of Construction 1983      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1983 [Member] | Remscheid, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,029      
Initial costs, buildings 2,614      
Additions subsequent to acquisition, Improvements 60      
Land at cost 1,089      
Buildings at cost 2,614      
Total at cost 3,703      
Accumulated Depreciation 23      
Encumbrances $ 0      
Date of Construction 1983      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1983 [Member] | Port Huron, MI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,029      
Initial costs, buildings 14,622      
Land at cost 3,029      
Buildings at cost 14,622      
Total at cost 17,651      
Accumulated Depreciation 1,498      
Encumbrances $ 0      
Date of Construction 1983      
Date Acquired Dec. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 30 years      
1951 [Member] | Remscheid, Germany [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,029      
Initial costs, buildings 2,614      
Additions subsequent to acquisition, Improvements 60      
Land at cost 1,089      
Buildings at cost 2,614      
Total at cost 3,703      
Accumulated Depreciation 23      
Encumbrances $ 0      
Date of Construction 1951      
Date Acquired Aug. 28, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,345      
Initial costs, buildings 3,678      
Land at cost 1,345      
Buildings at cost 3,678      
Total at cost 5,023      
Accumulated Depreciation 414      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jun. 20, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Allen, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,550      
Initial costs, buildings 866      
Land at cost 1,550      
Buildings at cost 866      
Total at cost 2,416      
Accumulated Depreciation 441      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jul. 14, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Alvin, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 105      
Initial costs, buildings 4,087      
Land at cost 105      
Buildings at cost 4,087      
Total at cost 4,192      
Accumulated Depreciation 462      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Mar. 19, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Austin, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,140      
Initial costs, buildings 1,777      
Land at cost 1,140      
Buildings at cost 1,777      
Total at cost 2,917      
Accumulated Depreciation 441      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired May 29, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Broomfield, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 825      
Initial costs, buildings 3,895      
Land at cost 825      
Buildings at cost 3,895      
Total at cost 4,720      
Accumulated Depreciation 438      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jul. 03, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Cedar Hill. TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,122      
Initial costs, buildings 3,644      
Land at cost 1,122      
Buildings at cost 3,644      
Total at cost 4,766      
Accumulated Depreciation 410      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jun. 23, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Spring, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,310      
Initial costs, buildings 3,639      
Land at cost 1,310      
Buildings at cost 3,639      
Total at cost 4,949      
Accumulated Depreciation 409      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jul. 15, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Commerce City, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 707      
Initial costs, buildings 4,248      
Land at cost 707      
Buildings at cost 4,248      
Total at cost 4,955      
Accumulated Depreciation 434      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Dec. 11, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Dulles, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,076      
Initial costs, buildings 3,784      
Land at cost 1,076      
Buildings at cost 3,784      
Total at cost 4,860      
Accumulated Depreciation 410      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Sep. 12, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Firestone, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 495      
Initial costs, buildings 3,963      
Land at cost 495      
Buildings at cost 3,963      
Total at cost 4,458      
Accumulated Depreciation 454      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jun. 06, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Fountain, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,508      
Initial costs, buildings 4,131      
Land at cost 1,508      
Buildings at cost 4,131      
Total at cost 5,639      
Accumulated Depreciation 456      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jul. 31, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Frisco, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,500      
Initial costs, buildings 3,863      
Additions subsequent to acquisition, Improvements 27      
Additions subsequent to acquisition, carrying costs (89)      
Land at cost 1,411      
Buildings at cost 3,890      
Total at cost 5,301      
Accumulated Depreciation 446      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jun. 13, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 351      
Initial costs, buildings 3,952      
Land at cost 351      
Buildings at cost 3,952      
Total at cost 4,303      
Accumulated Depreciation 468      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jan. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Colorado Springs, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 600      
Initial costs, buildings 4,231      
Land at cost 600      
Buildings at cost 4,231      
Total at cost 4,831      
Accumulated Depreciation 485      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Jun. 05, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Altoona, WI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, buildings $ 29,062      
Buildings at cost 29,062      
Total at cost 29,062      
Accumulated Depreciation 3,148      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Aug. 31, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Ogden, UT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,759      
Initial costs, buildings 16,414      
Land at cost 1,759      
Buildings at cost 16,414      
Total at cost 18,173      
Accumulated Depreciation 1,971      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Mar. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Pearland, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,075      
Initial costs, buildings 3,577      
Land at cost 1,075      
Buildings at cost 3,577      
Total at cost 4,652      
Accumulated Depreciation 388      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Sep. 08, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Sienna, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,000      
Initial costs, buildings 3,591      
Land at cost 1,000      
Buildings at cost 3,591      
Total at cost 4,591      
Accumulated Depreciation 389      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Aug. 20, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2014 [Member] | Thornton, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,350      
Initial costs, buildings 4,259      
Land at cost 1,350      
Buildings at cost 4,259      
Total at cost 5,609      
Accumulated Depreciation 461      
Encumbrances $ 0      
Date of Construction 2014      
Date Acquired Aug. 29, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,423      
Initial costs, buildings 3,772      
Land at cost 1,423      
Buildings at cost 3,772      
Total at cost 5,195      
Accumulated Depreciation 361      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Feb. 18, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Aurora, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,812      
Buildings at cost 4,812      
Total at cost 4,812      
Accumulated Depreciation 391      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Sep. 17, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Ft. Worth, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,392      
Buildings at cost 4,392      
Total at cost 4,392      
Accumulated Depreciation 412      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Mar. 27, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Glendale, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,046      
Buildings at cost 4,046      
Total at cost 4,046      
Accumulated Depreciation 362      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jun. 05, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Carrollton, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 729      
Initial costs, buildings 34,342      
Land at cost 729      
Buildings at cost 34,342      
Total at cost 35,071      
Accumulated Depreciation 2,933      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jul. 17, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Chandler, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,783      
Buildings at cost 4,783      
Total at cost 4,783      
Accumulated Depreciation 438      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Apr. 24, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Katy, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 3,873      
Buildings at cost 3,873      
Total at cost 3,873      
Accumulated Depreciation 307      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Oct. 21, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Conroe, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,338      
Initial costs, buildings 3,712      
Land at cost 1,338      
Buildings at cost 3,712      
Total at cost 5,050      
Accumulated Depreciation 317      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jul. 29, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Converse, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 750      
Initial costs, buildings 4,423      
Land at cost 750      
Buildings at cost 4,423      
Total at cost 5,173      
Accumulated Depreciation 415      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Apr. 10, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Denver, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,276      
Buildings at cost 4,276      
Total at cost 4,276      
Accumulated Depreciation 383      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jun. 08, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Dorchester, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 14,428      
Initial costs, buildings 219,575      
Additions subsequent to acquisition, Improvements 5,394      
Land at cost 14,428      
Buildings at cost 224,969      
Total at cost 239,397      
Accumulated Depreciation 1,371      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Oct. 15, 2018      
Life on which depreciation in latest income statements is computed (Years) 42 years      
2015 [Member] | Frisco, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 2,441      
Initial costs, buildings 185      
Land at cost 2,441      
Buildings at cost 185      
Total at cost 2,626      
Accumulated Depreciation 354      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Nov. 13, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Gilbert, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,517      
Initial costs, buildings 4,660      
Land at cost 1,517      
Buildings at cost 4,660      
Total at cost 6,177      
Accumulated Depreciation 398      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jul. 22, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Highland Village, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 1,551      
Buildings at cost 1,551      
Total at cost 1,551      
Accumulated Depreciation 326      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Sep. 22, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Hoover, AL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 7,581      
Buildings at cost 7,581      
Total at cost 7,581      
Accumulated Depreciation 812      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired May 01, 2015      
Life on which depreciation in latest income statements is computed (Years) 34 years      
2015 [Member] | Lehi, UT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,403      
Initial costs, buildings 29,950      
Additions subsequent to acquisition, Improvements 156      
Additions subsequent to acquisition, carrying costs (35)      
Land at cost 13,368      
Buildings at cost 30,106      
Total at cost 43,474      
Accumulated Depreciation 1,108      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 45 years      
2015 [Member] | McKinney, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,060      
Buildings at cost 4,060      
Total at cost 4,060      
Accumulated Depreciation 466      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jul. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 30 years      
2015 [Member] | Parker, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,300      
Initial costs, buildings 4,448      
Land at cost 1,300      
Buildings at cost 4,448      
Total at cost 5,748      
Accumulated Depreciation 352      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Nov. 06, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 [Member] | Taunton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,428      
Initial costs, buildings 73,228      
Additions subsequent to acquisition, Improvements 2,951      
Land at cost 4,428      
Buildings at cost 76,179      
Total at cost 80,607      
Accumulated Depreciation 4,400      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2015 [Member] | League City, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 3,901      
Buildings at cost 3,901      
Total at cost 3,901      
Accumulated Depreciation 341      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Jun. 19, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1970 [Member] | Ayer, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 9,048      
Initial costs, buildings 77,913      
Additions subsequent to acquisition, Improvements 1,603      
Land at cost 9,048      
Buildings at cost 79,516      
Total at cost 88,564      
Accumulated Depreciation 911      
Encumbrances $ 0      
Date of Construction 1970      
Date Acquired Jun. 27, 2018      
Life on which depreciation in latest income statements is computed (Years) 47 years      
1970 [Member] | Rockledge, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,919      
Initial costs, buildings 23,282      
Additions subsequent to acquisition, Improvements 1,831      
Land at cost 13,919      
Buildings at cost 25,113      
Total at cost 39,032      
Accumulated Depreciation 1,460      
Encumbrances $ 0      
Date of Construction 1970      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 42 years      
2013 [Member] | Ayer, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 9,048      
Initial costs, buildings 77,913      
Additions subsequent to acquisition, Improvements 1,603      
Land at cost 9,048      
Buildings at cost 79,516      
Total at cost 88,564      
Accumulated Depreciation 911      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Jun. 27, 2018      
Life on which depreciation in latest income statements is computed (Years) 47 years      
2013 [Member] | Hausman, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,500      
Initial costs, buildings 8,957      
Land at cost 1,500      
Buildings at cost 8,957      
Total at cost 10,457      
Accumulated Depreciation 1,284      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Mar. 01, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2013 [Member] | Lafayette, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 800      
Initial costs, buildings 14,968      
Additions subsequent to acquisition, Improvements (25)      
Land at cost 800      
Buildings at cost 14,943      
Total at cost 15,743      
Accumulated Depreciation 2,198      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Feb. 01, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2013 [Member] | Lehi, UT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,241      
Initial costs, buildings 3,491      
Land at cost 1,241      
Buildings at cost 3,491      
Total at cost 4,732      
Accumulated Depreciation 441      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Dec. 01, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2013 [Member] | Post Falls, ID [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 417      
Initial costs, buildings 12,175      
Additions subsequent to acquisition, Improvements 1,905      
Land at cost 767      
Buildings at cost 13,730      
Total at cost 14,497      
Accumulated Depreciation 1,725      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Dec. 31, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2013 [Member] | Spartanburg, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,135      
Initial costs, buildings 15,717      
Land at cost 1,135      
Buildings at cost 15,717      
Total at cost 16,852      
Accumulated Depreciation 2,112      
Encumbrances $ 0      
Date of Construction 2013      
Date Acquired Aug. 01, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1918 [Member] | Bayonne, NJ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,003      
Initial costs, buildings 51,495      
Land at cost 2,003      
Buildings at cost 51,495      
Total at cost 53,498      
Accumulated Depreciation 20,383      
Encumbrances $ 0      
Date of Construction 1918      
Date Acquired Feb. 04, 2011      
Life on which depreciation in latest income statements is computed (Years) 20 years      
1984 [Member] | Bennettsville, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 794      
Initial costs, buildings 15,772      
Land at cost 794      
Buildings at cost 15,772      
Total at cost 16,566      
Accumulated Depreciation 4,157      
Encumbrances $ 0      
Date of Construction 1984      
Date Acquired Apr. 01, 2008      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1984 [Member] | Hope, AR [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,651      
Initial costs, buildings 3,359      
Additions subsequent to acquisition, Improvements 373      
Land at cost 1,651      
Buildings at cost 3,732      
Total at cost 5,383      
Accumulated Depreciation 223      
Encumbrances $ 0      
Date of Construction 1984      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1984 [Member] | Olympia, Washington [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,220      
Initial costs, buildings 89,348      
Additions subsequent to acquisition, Improvements 15,930      
Land at cost 7,220      
Buildings at cost 105,278      
Total at cost 112,498      
Accumulated Depreciation 6,138      
Encumbrances $ 0      
Date of Construction 1984      
Date Acquired Jul. 22, 2016      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1980 [Member] | Blue Springs, MO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,347      
Initial costs, buildings 23,494      
Land at cost 4,347      
Buildings at cost 23,494      
Total at cost 27,841      
Accumulated Depreciation 2,417      
Encumbrances $ 0      
Date of Construction 1980      
Date Acquired Feb. 13, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1980 [Member] | Hill County, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,120      
Initial costs, buildings 17,882      
Land at cost 1,120      
Buildings at cost 17,882      
Total at cost 19,002      
Accumulated Depreciation 9,890      
Encumbrances $ 0      
Date of Construction 1980      
Date Acquired Sep. 17, 2010      
Life on which depreciation in latest income statements is computed (Years) 15 years      
1980 [Member] | Poplar Bluff, MO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,660      
Initial costs, buildings 38,693      
Additions subsequent to acquisition, carrying costs 1      
Land at cost 2,660      
Buildings at cost 38,694      
Total at cost 41,354      
Accumulated Depreciation 10,339      
Encumbrances $ 0      
Date of Construction 1980      
Date Acquired Apr. 22, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1980 [Member] | Sharon, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,179      
Initial costs, buildings 9,066      
Additions subsequent to acquisition, Improvements 1,808      
Land at cost 6,179      
Buildings at cost 10,874      
Total at cost 17,053      
Accumulated Depreciation 1,096      
Encumbrances $ 0      
Date of Construction 1980      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1980 [Member] | West Valley City, UT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,516      
Initial costs, buildings 58,314      
Additions subsequent to acquisition, Improvements 2,478      
Additions subsequent to acquisition, carrying costs (114)      
Land at cost 5,402      
Buildings at cost 60,792      
Total at cost 66,194      
Accumulated Depreciation 15,762      
Encumbrances $ 0      
Date of Construction 1980      
Date Acquired Apr. 22, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1982 [Member] | Bossier City, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 900      
Initial costs, buildings 17,818      
Additions subsequent to acquisition, Improvements 628      
Land at cost 900      
Buildings at cost 18,446      
Total at cost 19,346      
Accumulated Depreciation 4,786      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired Apr. 01, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1982 [Member] | Cheraw, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 657      
Initial costs, buildings 19,576      
Land at cost 657      
Buildings at cost 19,576      
Total at cost 20,233      
Accumulated Depreciation 5,158      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired Apr. 01, 2008      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1982 [Member] | Garden Grove, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,502      
Initial costs, buildings 10,748      
Additions subsequent to acquisition, carrying costs 51      
Land at cost 5,502      
Buildings at cost 10,799      
Total at cost 16,301      
Accumulated Depreciation 2,736      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired Nov. 25, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1982 [Member] | Haverhill, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,651      
Initial costs, buildings 105,848      
Additions subsequent to acquisition, Improvements 1,888      
Land at cost 5,651      
Buildings at cost 107,736      
Total at cost 113,387      
Accumulated Depreciation 936      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired Aug. 31, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1982 [Member] | Warren, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,385      
Initial costs, buildings 47,588      
Additions subsequent to acquisition, Improvements 5,142      
Land at cost 5,385      
Buildings at cost 52,730      
Total at cost 58,115      
Accumulated Depreciation 2,509      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1917 [Member] | Brighton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 18,540      
Initial costs, buildings 146,490      
Additions subsequent to acquisition, Improvements 11,176      
Land at cost 18,540      
Buildings at cost 157,666      
Total at cost 176,206      
Accumulated Depreciation 8,304      
Encumbrances $ 0      
Date of Construction 1917      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1965 [Member] | Brockton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 18,328      
Initial costs, buildings 67,248      
Additions subsequent to acquisition, Improvements 4,296      
Land at cost 18,328      
Buildings at cost 71,544      
Total at cost 89,872      
Accumulated Depreciation 4,798      
Encumbrances $ 0      
Date of Construction 1965      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2015 One [Member] | Chandler, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 750      
Initial costs, buildings 3,852      
Additions subsequent to acquisition, Improvements 0      
Land at cost 750      
Buildings at cost 3,852      
Total at cost 4,602      
Accumulated Depreciation 313      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired Oct. 07, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2015 One [Member] | Hoover, AL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Medical Office Building      
Initial costs, buildings $ 1,034      
Buildings at cost 1,034      
Total at cost 1,034      
Accumulated Depreciation 111      
Encumbrances $ 0      
Date of Construction 2015      
Date Acquired May 01, 2015      
Life on which depreciation in latest income statements is computed (Years) 34 years      
2004 [Member] | Webster, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 663      
Initial costs, buildings 33,751      
Land at cost 663      
Buildings at cost 33,751      
Total at cost 34,414      
Accumulated Depreciation 6,750      
Encumbrances $ 0      
Date of Construction 2004      
Date Acquired Dec. 21, 2010      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2004 [Member] | Camden, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, buildings $ 22,739      
Buildings at cost 22,739      
Total at cost 22,739      
Accumulated Depreciation 1,555      
Encumbrances $ 0      
Date of Construction 2004      
Date Acquired Oct. 30, 2015      
Life on which depreciation in latest income statements is computed (Years) 39 years      
2004 [Member] | Odessa, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,535      
Initial costs, buildings 123,518      
Additions subsequent to acquisition, Improvements 254      
Land at cost 6,535      
Buildings at cost 123,772      
Total at cost 130,307      
Accumulated Depreciation 3,950      
Encumbrances $ 0      
Date of Construction 2004      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2017 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,267      
Buildings at cost 4,267      
Total at cost 4,267      
Accumulated Depreciation 203      
Encumbrances $ 0      
Date of Construction 2017      
Date Acquired May 08, 2017      
Life on which depreciation in latest income statements is computed (Years) 35 years      
2017 [Member] | Austin, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, buildings $ 4,200      
Buildings at cost 4,200      
Total at cost 4,200      
Accumulated Depreciation 231      
Encumbrances $ 0      
Date of Construction 2017      
Date Acquired Mar. 02, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2017 [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,576      
Initial costs, buildings 45,782      
Land at cost 5,576      
Buildings at cost 45,782      
Total at cost 51,358      
Accumulated Depreciation 2,194      
Encumbrances $ 0      
Date of Construction 2017      
Date Acquired Feb. 10, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2017 [Member] | Texarkana, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 14,562      
Land at cost 14,562      
Total at cost 14,562      
Encumbrances $ 0      
Date of Construction 2017      
Date Acquired Sep. 29, 2017      
1956 [Member] | Detroit, MI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 1,220      
Initial costs, buildings 8,687      
Additions subsequent to acquisition, carrying costs (365)      
Land at cost 1,220      
Buildings at cost 8,322      
Total at cost 9,542      
Accumulated Depreciation 2,274      
Encumbrances $ 0      
Date of Construction 1956      
Date Acquired May 22, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1953 [Member] | Dorchester, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 14,428      
Initial costs, buildings 219,575      
Additions subsequent to acquisition, Improvements 5,394      
Land at cost 14,428      
Buildings at cost 224,969      
Total at cost 239,397      
Accumulated Depreciation 1,371      
Encumbrances $ 0      
Date of Construction 1953      
Date Acquired Oct. 15, 2018      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1953 [Member] | Port Huron, MI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,029      
Initial costs, buildings 14,622      
Land at cost 3,029      
Buildings at cost 14,622      
Total at cost 17,651      
Accumulated Depreciation 1,498      
Encumbrances $ 0      
Date of Construction 1953      
Date Acquired Dec. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 30 years      
1930 [Member] | Easton, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,898      
Initial costs, buildings 40,245      
Additions subsequent to acquisition, Improvements 2,921      
Land at cost 13,898      
Buildings at cost 43,166      
Total at cost 57,064      
Accumulated Depreciation 1,786      
Encumbrances $ 0      
Date of Construction 1930      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2005 [Member] | Easton, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,898      
Initial costs, buildings 40,245      
Additions subsequent to acquisition, Improvements 2,921      
Land at cost 13,898      
Buildings at cost 43,166      
Total at cost 57,064      
Accumulated Depreciation 1,786      
Encumbrances $ 0      
Date of Construction 2005      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2005 [Member] | Gilbert, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 150      
Initial costs, buildings 15,553      
Land at cost 150      
Buildings at cost 15,553      
Total at cost 15,703      
Accumulated Depreciation 3,111      
Encumbrances $ 0      
Date of Construction 2005      
Date Acquired Jan. 04, 2011      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2005 [Member] | Haverhill, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,651      
Initial costs, buildings 105,848      
Additions subsequent to acquisition, Improvements 1,888      
Land at cost 5,651      
Buildings at cost 107,736      
Total at cost 113,387      
Accumulated Depreciation 936      
Encumbrances $ 0      
Date of Construction 2005      
Date Acquired Aug. 31, 2018      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2005 [Member] | Port Arthur, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 12,972      
Initial costs, buildings 78,051      
Additions subsequent to acquisition, Improvements 859      
Land at cost 12,972      
Buildings at cost 78,910      
Total at cost 91,882      
Accumulated Depreciation 10,155      
Encumbrances $ 0      
Date of Construction 2005      
Date Acquired Sep. 26, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2005 [Member] | Tomball, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 1,299      
Initial costs, buildings 23,982      
Land at cost 1,299      
Buildings at cost 23,982      
Total at cost 25,281      
Accumulated Depreciation 4,796      
Encumbrances $ 0      
Date of Construction 2005      
Date Acquired Dec. 21, 2010      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1939 [Member] | Fairmont, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,000      
Initial costs, buildings 6,072      
Additions subsequent to acquisition, Improvements 5,278      
Land at cost 1,277      
Buildings at cost 11,073      
Total at cost 12,350      
Accumulated Depreciation 1,798      
Encumbrances $ 0      
Date of Construction 1939      
Date Acquired Sep. 19, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1950 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 28,687      
Initial costs, buildings 104,028      
Additions subsequent to acquisition, Improvements 5,999      
Land at cost 28,687      
Buildings at cost 110,027      
Total at cost 138,714      
Accumulated Depreciation 878      
Encumbrances $ 0      
Date of Construction 1950      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1950 [Member] | Fall River, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,526      
Initial costs, buildings 82,358      
Additions subsequent to acquisition, Improvements 22,205      
Land at cost 3,525      
Buildings at cost 104,564      
Total at cost 108,089      
Accumulated Depreciation 4,977      
Encumbrances $ 0      
Date of Construction 1950      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1950 [Member] | Methuen, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 23,809      
Initial costs, buildings 89,505      
Additions subsequent to acquisition, Improvements 5,698      
Land at cost 23,809      
Buildings at cost 95,203      
Total at cost 119,012      
Accumulated Depreciation 5,766      
Encumbrances $ 0      
Date of Construction 1950      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1950 [Member] | Rockledge, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,919      
Initial costs, buildings 23,282      
Additions subsequent to acquisition, Improvements 1,831      
Land at cost 13,919      
Buildings at cost 25,113      
Total at cost 39,032      
Accumulated Depreciation 1,460      
Encumbrances $ 0      
Date of Construction 1950      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1950 [Member] | Sharon, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,179      
Initial costs, buildings 9,066      
Additions subsequent to acquisition, Improvements 1,808      
Land at cost 6,179      
Buildings at cost 10,874      
Total at cost 17,053      
Accumulated Depreciation 1,096      
Encumbrances $ 0      
Date of Construction 1950      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1972 [Member] | Fairmont, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,000      
Initial costs, buildings 6,072      
Additions subsequent to acquisition, Improvements 5,278      
Land at cost 1,277      
Buildings at cost 11,073      
Total at cost 12,350      
Accumulated Depreciation 1,798      
Encumbrances $ 0      
Date of Construction 1972      
Date Acquired Sep. 19, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1972 [Member] | San Dimas, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,160      
Initial costs, buildings 6,839      
Additions subsequent to acquisition, carrying costs 34      
Land at cost 6,160      
Buildings at cost 6,873      
Total at cost 13,033      
Accumulated Depreciation 1,735      
Encumbrances $ 0      
Date of Construction 1972      
Date Acquired Nov. 25, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1985 [Member] | Fairmont, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,000      
Initial costs, buildings 6,072      
Additions subsequent to acquisition, Improvements 5,278      
Land at cost 1,277      
Buildings at cost 11,073      
Total at cost 12,350      
Accumulated Depreciation 1,798      
Encumbrances $ 0      
Date of Construction 1985      
Date Acquired Sep. 19, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1985 [Member] | Fort Lauderdale, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 3,499      
Initial costs, buildings 21,939      
Additions subsequent to acquisition, carrying costs 1      
Land at cost 3,499      
Buildings at cost 21,940      
Total at cost 25,439      
Accumulated Depreciation 5,862      
Encumbrances $ 0      
Date of Construction 1985      
Date Acquired Apr. 22, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1985 [Member] | Hot Springs, AR [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,100      
Initial costs, buildings 59,432      
Additions subsequent to acquisition, Improvements 21,221      
Land at cost 7,100      
Buildings at cost 80,653      
Total at cost 87,753      
Accumulated Depreciation 6,795      
Encumbrances $ 0      
Date of Construction 1985      
Date Acquired Aug. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
Two Thousand Twelve | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,248      
Initial costs, buildings 5,880      
Land at cost 2,248      
Buildings at cost 5,880      
Total at cost 8,128      
Accumulated Depreciation 904      
Encumbrances $ 0      
Date of Construction 2012      
Date Acquired Oct. 02, 2012      
Life on which depreciation in latest income statements is computed (Years) 40 years      
Two Thousand Twelve | Fall River, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 3,526      
Initial costs, buildings 82,358      
Additions subsequent to acquisition, Improvements 22,205      
Land at cost 3,525      
Buildings at cost 104,564      
Total at cost 108,089      
Accumulated Depreciation 4,977      
Encumbrances $ 0      
Date of Construction 2012      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
Two Thousand Twelve | Florence, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 900      
Initial costs, buildings 28,462      
Additions subsequent to acquisition, Improvements 105      
Land at cost 900      
Buildings at cost 28,567      
Total at cost 29,467      
Accumulated Depreciation 4,817      
Encumbrances $ 0      
Date of Construction 2012      
Date Acquired Feb. 07, 2012      
Life on which depreciation in latest income statements is computed (Years) 40 years      
Two Thousand Twelve | Overlook, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,452      
Initial costs, buildings 9,666      
Additions subsequent to acquisition, Improvements 7      
Land at cost 2,452      
Buildings at cost 9,673      
Total at cost 12,125      
Accumulated Depreciation 1,411      
Encumbrances $ 0      
Date of Construction 2012      
Date Acquired Feb. 01, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1982 One [Member] | Garden Grove, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Medical Office Building      
Initial costs, land $ 862      
Initial costs, buildings 7,888      
Additions subsequent to acquisition, carrying costs 28      
Land at cost 862      
Buildings at cost 7,916      
Total at cost 8,778      
Accumulated Depreciation 1,999      
Encumbrances $ 0      
Date of Construction 1982      
Date Acquired Nov. 25, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
Nineteen Ninety Nine | Hartsville, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,050      
Initial costs, buildings 43,970      
Land at cost 2,050      
Buildings at cost 43,970      
Total at cost 46,020      
Accumulated Depreciation 3,827      
Encumbrances $ 0      
Date of Construction 1999      
Date Acquired Aug. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 34 years      
1922 [Member] | Warren, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 2,417      
Initial costs, buildings 15,857      
Additions subsequent to acquisition, Improvements 35      
Land at cost 2,417      
Buildings at cost 15,892      
Total at cost 18,309      
Accumulated Depreciation 891      
Encumbrances $ 0      
Date of Construction 1922      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 46 years      
1922 [Member] | Lewiston, ID [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,389      
Initial costs, buildings 75,435      
Land at cost 5,389      
Buildings at cost 75,435      
Total at cost 80,824      
Accumulated Depreciation 4,251      
Encumbrances $ 0      
Date of Construction 1922      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2000 [Member] | Warren, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 2,417      
Initial costs, buildings 15,857      
Additions subsequent to acquisition, Improvements 35      
Land at cost 2,417      
Buildings at cost 15,892      
Total at cost 18,309      
Accumulated Depreciation 891      
Encumbrances $ 0      
Date of Construction 2000      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 46 years      
2000 [Member] | Montclair, NJ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,900      
Initial costs, buildings 99,640      
Additions subsequent to acquisition, Improvements 577      
Land at cost 8,477      
Buildings at cost 99,640      
Total at cost 108,117      
Accumulated Depreciation 12,211      
Encumbrances $ 0      
Date of Construction 2000      
Date Acquired Apr. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1863 [Member] | Hoboken, NJ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,387      
Initial costs, buildings 44,351      
Land at cost 1,387      
Buildings at cost 44,351      
Total at cost 45,738      
Accumulated Depreciation 15,838      
Encumbrances $ 0      
Date of Construction 1863      
Date Acquired Nov. 04, 2011      
Life on which depreciation in latest income statements is computed (Years) 20 years      
2001 [Member] | Hope, AR [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,651      
Initial costs, buildings 3,359      
Additions subsequent to acquisition, Improvements 373      
Land at cost 1,651      
Buildings at cost 3,732      
Total at cost 5,383      
Accumulated Depreciation 223      
Encumbrances $ 0      
Date of Construction 2001      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2001 [Member] | Norwood, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,073      
Initial costs, buildings 154,496      
Additions subsequent to acquisition, Improvements 7,745      
Land at cost 7,073      
Buildings at cost 162,241      
Total at cost 169,314      
Accumulated Depreciation 1,781      
Encumbrances $ 0      
Date of Construction 2001      
Date Acquired Jun. 27, 2018      
Life on which depreciation in latest income statements is computed (Years) 46 years      
1940 [Member] | Houston, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 28,687      
Initial costs, buildings 104,028      
Additions subsequent to acquisition, Improvements 5,999      
Land at cost 28,687      
Buildings at cost 110,027      
Total at cost 138,714      
Accumulated Depreciation 878      
Encumbrances $ 0      
Date of Construction 1940      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1940 [Member] | Taunton, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,428      
Initial costs, buildings 73,228      
Additions subsequent to acquisition, Improvements 2,951      
Land at cost 4,428      
Buildings at cost 76,179      
Total at cost 80,607      
Accumulated Depreciation 4,400      
Encumbrances $ 0      
Date of Construction 1940      
Date Acquired Oct. 03, 2016      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1940 [Member] | Tempe, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,050      
Initial costs, buildings 10,986      
Additions subsequent to acquisition, Improvements 871      
Land at cost 6,050      
Buildings at cost 11,857      
Total at cost 17,907      
Accumulated Depreciation 476      
Encumbrances $ 0      
Date of Construction 1940      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2002 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 8,053      
Initial costs, buildings 29,333      
Additions subsequent to acquisition, Improvements 675      
Land at cost 8,053      
Buildings at cost 30,008      
Total at cost 38,061      
Accumulated Depreciation 1,024      
Encumbrances $ 0      
Date of Construction 2002      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2002 [Member] | Idaho Falls, ID [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,822      
Initial costs, buildings 37,467      
Additions subsequent to acquisition, Improvements 441      
Additions subsequent to acquisition, carrying costs 4,665      
Land at cost 1,822      
Buildings at cost 42,573      
Total at cost 44,395      
Accumulated Depreciation 11,201      
Encumbrances $ 0      
Date of Construction 2002      
Date Acquired Apr. 01, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2002 [Member] | Melbourne, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,642      
Initial costs, buildings 17,087      
Additions subsequent to acquisition, Improvements 2,282      
Land at cost 5,642      
Buildings at cost 19,369      
Total at cost 25,011      
Accumulated Depreciation 922      
Encumbrances $ 0      
Date of Construction 2002      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1978 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 8,053      
Initial costs, buildings 29,333      
Additions subsequent to acquisition, Improvements 675      
Land at cost 8,053      
Buildings at cost 30,008      
Total at cost 38,061      
Accumulated Depreciation 1,024      
Encumbrances $ 0      
Date of Construction 1978      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1978 [Member] | Kansas City, MO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 10,497      
Initial costs, buildings 64,419      
Land at cost 10,497      
Buildings at cost 64,419      
Total at cost 74,916      
Accumulated Depreciation 6,429      
Encumbrances $ 0      
Date of Construction 1978      
Date Acquired Feb. 13, 2015      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1954 [Member] | Camden, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, buildings $ 22,739      
Buildings at cost 22,739      
Total at cost 22,739      
Accumulated Depreciation 1,555      
Encumbrances $ 0      
Date of Construction 1954      
Date Acquired Oct. 30, 2015      
Life on which depreciation in latest income statements is computed (Years) 39 years      
1996 [Member] | McMinnville, OR [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 5,000      
Initial costs, buildings 97,900      
Land at cost 5,000      
Buildings at cost 97,900      
Total at cost 102,900      
Accumulated Depreciation 6,652      
Encumbrances $ 0      
Date of Construction 1996      
Date Acquired Aug. 31, 2015      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2007 [Member] | Mesa, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,534      
Initial costs, buildings 100,042      
Additions subsequent to acquisition, Improvements 289      
Land at cost 6,533      
Buildings at cost 100,332      
Total at cost 106,865      
Accumulated Depreciation 13,819      
Encumbrances $ 0      
Date of Construction 2007      
Date Acquired Sep. 26, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
2007 [Member] | Northland, MO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Long term acute care hospital      
Initial costs, land $ 834      
Initial costs, buildings 17,182      
Land at cost 834      
Buildings at cost 17,182      
Total at cost 18,016      
Accumulated Depreciation 3,401      
Encumbrances $ 0      
Date of Construction 2007      
Date Acquired Feb. 14, 2011      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1920 [Member] | Montclair, NJ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,900      
Initial costs, buildings 99,640      
Additions subsequent to acquisition, Improvements 577      
Land at cost 8,477      
Buildings at cost 99,640      
Total at cost 108,117      
Accumulated Depreciation 12,211      
Encumbrances $ 0      
Date of Construction 1920      
Date Acquired Apr. 01, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1920 [Member] | Pasco, WA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,594      
Initial costs, buildings 13,195      
Land at cost 2,594      
Buildings at cost 13,195      
Total at cost 15,789      
Accumulated Depreciation 150      
Encumbrances $ 0      
Date of Construction 1920      
Date Acquired Aug. 31, 2018      
Life on which depreciation in latest income statements is computed (Years) 30 years      
1926 [Member] | Norwood, MA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 7,073      
Initial costs, buildings 154,496      
Additions subsequent to acquisition, Improvements 7,745      
Land at cost 7,073      
Buildings at cost 162,241      
Total at cost 169,314      
Accumulated Depreciation 1,781      
Encumbrances $ 0      
Date of Construction 1926      
Date Acquired Jun. 27, 2018      
Life on which depreciation in latest income statements is computed (Years) 46 years      
1964 [Member] | San Diego, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 6,550      
Initial costs, buildings 15,653      
Additions subsequent to acquisition, carrying costs 77      
Land at cost 6,550      
Buildings at cost 15,730      
Total at cost 22,280      
Accumulated Depreciation 4,586      
Encumbrances $ 0      
Date of Construction 1964      
Date Acquired May 09, 2007      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1964 [Member] | Anaheim, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 1,875      
Initial costs, buildings 21,813      
Additions subsequent to acquisition, carrying costs 10      
Land at cost 1,875      
Buildings at cost 21,823      
Total at cost 23,698      
Accumulated Depreciation 6,638      
Encumbrances $ 0      
Date of Construction 1964      
Date Acquired Nov. 08, 2006      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1979 [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 2,396      
Initial costs, buildings 26,521      
Additions subsequent to acquisition, Improvements 2,931      
Land at cost 2,396      
Buildings at cost 29,452      
Total at cost 31,848      
Accumulated Depreciation 817      
Encumbrances $ 0      
Date of Construction 1979      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 42 years      
1979 [Member] | San Dimas, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Medical Office Building      
Initial costs, land $ 1,915      
Initial costs, buildings 5,085      
Additions subsequent to acquisition, carrying costs 18      
Land at cost 1,915      
Buildings at cost 5,103      
Total at cost 7,018      
Accumulated Depreciation 1,289      
Encumbrances $ 0      
Date of Construction 1979      
Date Acquired Nov. 25, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1968 [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 12,695      
Initial costs, buildings 73,774      
Additions subsequent to acquisition, Improvements 2,432      
Land at cost 12,695      
Buildings at cost 76,206      
Total at cost 88,901      
Accumulated Depreciation 2,502      
Encumbrances $ 0      
Date of Construction 1968      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 43 years      
1976 [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 12,695      
Initial costs, buildings 73,774      
Additions subsequent to acquisition, Improvements 2,432      
Land at cost 12,695      
Buildings at cost 76,206      
Total at cost 88,901      
Accumulated Depreciation 2,502      
Encumbrances $ 0      
Date of Construction 1976      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 43 years      
1906 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,590      
Initial costs, buildings 101,915      
Additions subsequent to acquisition, Improvements 726      
Land at cost 13,590      
Buildings at cost 102,641      
Total at cost 116,231      
Accumulated Depreciation 3,178      
Encumbrances $ 0      
Date of Construction 1906      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
1987 [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 13,590      
Initial costs, buildings 101,915      
Additions subsequent to acquisition, Improvements 726      
Land at cost 13,590      
Buildings at cost 102,641      
Total at cost 116,231      
Accumulated Depreciation 3,178      
Encumbrances $ 0      
Date of Construction 1987      
Date Acquired Sep. 29, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2017 One [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Freestanding ER      
Initial costs, land $ 1,132      
Initial costs, buildings 5,052      
Land at cost 1,132      
Buildings at cost 5,052      
Total at cost 6,184      
Accumulated Depreciation 221      
Encumbrances $ 0      
Date of Construction 2017      
Date Acquired Apr. 13, 2017      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1913 [Member] | Sherman, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,493      
Initial costs, buildings 11,081      
Land at cost 4,493      
Buildings at cost 11,081      
Total at cost 15,574      
Accumulated Depreciation 2,703      
Encumbrances $ 0      
Date of Construction 1913      
Date Acquired Oct. 31, 2014      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1962 [Member] | West Monroe, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 12,000      
Initial costs, buildings 69,433      
Additions subsequent to acquisition, Improvements 11,013      
Land at cost 12,552      
Buildings at cost 79,894      
Total at cost 92,446      
Accumulated Depreciation 9,746      
Encumbrances $ 0      
Date of Construction 1962      
Date Acquired Sep. 26, 2013      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1992 [Member] | Wichita, KS [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Rehabilitation hospital      
Initial costs, land $ 1,019      
Initial costs, buildings 18,373      
Additions subsequent to acquisition, carrying costs 1      
Land at cost 1,019      
Buildings at cost 18,374      
Total at cost 19,393      
Accumulated Depreciation 4,937      
Encumbrances $ 0      
Date of Construction 1992      
Date Acquired Apr. 04, 2008      
Life on which depreciation in latest income statements is computed (Years) 40 years      
1929 [Member] | Youngstown, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,335      
Initial costs, buildings 3,565      
Additions subsequent to acquisition, Improvements 604      
Land at cost 4,334      
Buildings at cost 4,170      
Total at cost 8,504      
Accumulated Depreciation 965      
Encumbrances $ 0      
Date of Construction 1929      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
2003 [Member] | Youngstown, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Type of property Acute care general hospital      
Initial costs, land $ 4,335      
Initial costs, buildings 3,565      
Additions subsequent to acquisition, Improvements 604      
Land at cost 4,334      
Buildings at cost 4,170      
Total at cost 8,504      
Accumulated Depreciation 965      
Encumbrances $ 0      
Date of Construction 2003      
Date Acquired May 01, 2017      
Life on which depreciation in latest income statements is computed (Years) 41 years      
[1] Includes $131.4 million of land and building cost reflected in real estate held for sale at December 31, 2017. Excludes intangible lease assets that are included in real estate held for sale of $15.8 million at December 31, 2017.