Schedule III Real Estate and Accumulated Depreciation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Property	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Real Estate And Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 45,589
Initial Cost to Company, Building and improvements and intangible lease assets	543,147
Initial Cost to Company, Furniture, fixtures, and equipment	3,628
Cost Capitalized Subsequent to Acquisition	5,688
Gross Amount at Which Carried at Close of Period, Land	45,594
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	548,824
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	3,634
Gross Amount at Which Carried at Close of Period, Total	598,052	$ 563,728	$ 494,874	$ 504,853
Accumulated Depreciation	$ (59,611)	$ (41,984)	$ (26,052)	$ (11,172)
Texas Ten Portfolio | TX | SNF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	10
Initial Cost to Company, Land	$ 4,325
Initial Cost to Company, Building and improvements and intangible lease assets	140,815
Cost Capitalized Subsequent to Acquisition	2
Gross Amount at Which Carried at Close of Period, Land	4,325
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	140,817
Gross Amount at Which Carried at Close of Period, Total	145,142
Accumulated Depreciation	$ (15,062)
Date Acquired	2015
Texas Ten Portfolio | TX | Minimum | SNF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1963
Texas Ten Portfolio | TX | Maximum | SNF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	2013
Life Generations Portfolio | CA | SNF/ALF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	6
Initial Cost to Company, Land	$ 18,338
Initial Cost to Company, Building and improvements and intangible lease assets	75,592
Initial Cost to Company, Furniture, fixtures, and equipment	2,748
Cost Capitalized Subsequent to Acquisition	18
Gross Amount at Which Carried at Close of Period, Land	18,341
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	75,607
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	2,748
Gross Amount at Which Carried at Close of Period, Total	96,696
Accumulated Depreciation	$ (12,211)
Date Acquired	2015
Life Generations Portfolio | CA | Minimum | SNF/ALF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1966
Life Generations Portfolio | CA | Maximum | SNF/ALF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1992
Lakeway Hospital | TX | Acute Care Hospital
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 5,181
Initial Cost to Company, Building and improvements and intangible lease assets	69,875
Gross Amount at Which Carried at Close of Period, Land	5,181
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	69,875
Gross Amount at Which Carried at Close of Period, Total	75,056
Accumulated Depreciation	$ (5,967)
Date of Construction	2012
Date Acquired	2015
Kentfield Rehabilitation & Specialty Hospital | CA | LTACH
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 6,204
Initial Cost to Company, Building and improvements and intangible lease assets	51,826
Gross Amount at Which Carried at Close of Period, Land	6,204
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	51,826
Gross Amount at Which Carried at Close of Period, Total	58,030
Accumulated Depreciation	$ (6,553)
Date of Construction	1962
Date Acquired	2014
Mountain's Edge Hospital | NV | Acute Care Hospital
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 2,296
Initial Cost to Company, Building and improvements and intangible lease assets	27,116
Cost Capitalized Subsequent to Acquisition	5,144
Gross Amount at Which Carried at Close of Period, Land	2,296
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	32,260
Gross Amount at Which Carried at Close of Period, Total	34,556
Accumulated Depreciation	$ (2,337)
Date Acquired	2015
Mountain's Edge Hospital | NV | Minimum | Acute Care Hospital
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	2015
Mountain's Edge Hospital | NV | Maximum | Acute Care Hospital
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	2018
AAC Portfolio | TX, NV | BH
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	4
Initial Cost to Company, Land	$ 2,026
Initial Cost to Company, Building and improvements and intangible lease assets	23,021
Gross Amount at Which Carried at Close of Period, Land	2,026
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	23,021
Gross Amount at Which Carried at Close of Period, Total	25,047
Accumulated Depreciation	$ (1,288)
Date Acquired	2017
AAC Portfolio | TX, NV | Minimum | BH
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1980
AAC Portfolio | TX, NV | Maximum | BH
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	2001
Horizon Specialty Hospital of Henderson | NV | LTACH
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 733
Initial Cost to Company, Building and improvements and intangible lease assets	19,277
Gross Amount at Which Carried at Close of Period, Land	733
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	19,277
Gross Amount at Which Carried at Close of Period, Total	20,010
Accumulated Depreciation	$ (2,376)
Date of Construction	2012
Date Acquired	2014
Southern Indiana Rehabilitation Hospital | IN | IRF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 1,967
Initial Cost to Company, Building and improvements and intangible lease assets	21,409
Gross Amount at Which Carried at Close of Period, Land	1,968
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	21,408
Gross Amount at Which Carried at Close of Period, Total	23,376
Accumulated Depreciation	$ (468)
Date of Construction	1993
Date Acquired	2018
Physical Rehabilitation and Wellness Center of Spartanburg | South Carolina | SNF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 170
Initial Cost to Company, Building and improvements and intangible lease assets	19,830
Gross Amount at Which Carried at Close of Period, Land	170
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	19,830
Gross Amount at Which Carried at Close of Period, Total	20,000
Accumulated Depreciation	$ (2,321)
Date of Construction	1989
Date Acquired	2014
Vibra Rehabilitation Hospital of Amarillo | TX | IRF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 991
Initial Cost to Company, Building and improvements and intangible lease assets	18,181
Initial Cost to Company, Furniture, fixtures, and equipment	227
Gross Amount at Which Carried at Close of Period, Land	991
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	18,181
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	227
Gross Amount at Which Carried at Close of Period, Total	19,399
Accumulated Depreciation	$ (3,033)
Date of Construction	1990
Date Acquired	2015
Advanced Diagnostics Hospital East | TX | Acute Care Hospital
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 863
Initial Cost to Company, Building and improvements and intangible lease assets	16,668
Cost Capitalized Subsequent to Acquisition	18
Gross Amount at Which Carried at Close of Period, Land	864
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	16,685
Gross Amount at Which Carried at Close of Period, Total	17,549
Accumulated Depreciation	$ (495)
Date of Construction	1998
Date Acquired	2017
Mira Vista Court | TX | SNF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 1,343
Initial Cost to Company, Building and improvements and intangible lease assets	14,657
Gross Amount at Which Carried at Close of Period, Land	1,343
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	14,657
Gross Amount at Which Carried at Close of Period, Total	16,000
Accumulated Depreciation	$ (1,780)
Date of Construction	2013
Date Acquired	2015
North Brownsville Medical Plaza | TX | MOB
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Building and improvements and intangible lease assets	$ 15,128
Cost Capitalized Subsequent to Acquisition	506
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	15,628
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	6
Gross Amount at Which Carried at Close of Period, Total	15,634
Accumulated Depreciation	$ (3,533)
Date of Construction	2007
Date Acquired	2014
Magnolia Portfolio | IN | SNF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	2
Initial Cost to Company, Land	$ 217
Initial Cost to Company, Building and improvements and intangible lease assets	14,265
Initial Cost to Company, Furniture, fixtures, and equipment	557
Gross Amount at Which Carried at Close of Period, Land	217
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	14,265
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	557
Gross Amount at Which Carried at Close of Period, Total	15,039
Accumulated Depreciation	$ (1,179)
Date Acquired	2017
Magnolia Portfolio | IN | Minimum | SNF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1983
Magnolia Portfolio | IN | Maximum | SNF
Real Estate And Accumulated Depreciation [Line Items]
Date of Construction	1986
Woodlake at Tolland Nursing and Rehabilitation | CT | SNF
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 490
Initial Cost to Company, Building and improvements and intangible lease assets	9,643
Gross Amount at Which Carried at Close of Period, Land	490
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	9,643
Gross Amount at Which Carried at Close of Period, Total	10,133
Accumulated Depreciation	$ (956)
Date of Construction	1992
Date Acquired	2017
Norris Academy | TN | BH
Real Estate And Accumulated Depreciation [Line Items]
Number of Properties | Property	1
Initial Cost to Company, Land	$ 445
Initial Cost to Company, Building and improvements and intangible lease assets	5,844
Initial Cost to Company, Furniture, fixtures, and equipment	96
Gross Amount at Which Carried at Close of Period, Land	445
Gross Amount at Which Carried at Close of Period, Building and improvements and intangible lease assets	5,844
Gross Amount at Which Carried at Close of Period, Furniture, fixtures, and equipment	96
Gross Amount at Which Carried at Close of Period, Total	6,385
Accumulated Depreciation	$ (52)
Date of Construction	2018
Date Acquired	2018