Real Estate Investments - Schedule of Real Estate Property Investments (Details) $ in Thousands	Mar. 31, 2019 USD ($) real_estate_property	Dec. 31, 2018 USD ($)
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	105
Land and Land Improvements	$ 52,520	$ 50,270
Buildings, Improvements, and Lease Intangibles	425,763	394,527
Personal Property	135	133
Total real estate properties	478,418	444,930
Accumulated Depreciation	$ 60,544	$ 55,298
Medical office [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	35
Land and Land Improvements	$ 21,548
Buildings, Improvements, and Lease Intangibles	142,965
Total real estate properties	164,513
Accumulated Depreciation	$ 28,449
Medical office [Member] | Florida [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	5
Land and Land Improvements	$ 4,608
Buildings, Improvements, and Lease Intangibles	29,285
Total real estate properties	33,893
Accumulated Depreciation	$ 4,515
Medical office [Member] | Illinois [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 1,136
Buildings, Improvements, and Lease Intangibles	11,831
Total real estate properties	12,967
Accumulated Depreciation	$ 2,664
Medical office [Member] | Iowa [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 2,241
Buildings, Improvements, and Lease Intangibles	9,014
Total real estate properties	11,255
Accumulated Depreciation	$ 2,468
Medical office [Member] | Kansas [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	3
Land and Land Improvements	$ 2,455
Buildings, Improvements, and Lease Intangibles	14,933
Total real estate properties	17,388
Accumulated Depreciation	$ 4,189
Medical office [Member] | Ohio [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	6
Land and Land Improvements	$ 3,638
Buildings, Improvements, and Lease Intangibles	26,483
Total real estate properties	30,121
Accumulated Depreciation	$ 5,508
Medical office [Member] | Other States [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	15
Land and Land Improvements	$ 4,355
Buildings, Improvements, and Lease Intangibles	35,828
Total real estate properties	40,183
Accumulated Depreciation	$ 4,649
Medical office [Member] | Texas [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	3
Land and Land Improvements	$ 3,115
Buildings, Improvements, and Lease Intangibles	15,591
Total real estate properties	18,706
Accumulated Depreciation	$ 4,456
Physician clinics [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	21
Land and Land Improvements	$ 6,654
Buildings, Improvements, and Lease Intangibles	47,406
Total real estate properties	54,060
Accumulated Depreciation	$ 6,396
Physician clinics [Member] | Florida [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	4
Land and Land Improvements	$ 253
Buildings, Improvements, and Lease Intangibles	9,484
Total real estate properties	9,737
Accumulated Depreciation	$ 912
Physician clinics [Member] | Illinois [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	6
Land and Land Improvements	$ 2,888
Buildings, Improvements, and Lease Intangibles	9,539
Total real estate properties	12,427
Accumulated Depreciation	$ 540
Physician clinics [Member] | Kansas [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 610
Buildings, Improvements, and Lease Intangibles	6,921
Total real estate properties	7,531
Accumulated Depreciation	$ 1,485
Physician clinics [Member] | Other States [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	9
Land and Land Improvements	$ 2,903
Buildings, Improvements, and Lease Intangibles	21,462
Total real estate properties	24,365
Accumulated Depreciation	$ 3,459
Surgical Centers and Hospitals [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	15
Land and Land Improvements	$ 7,646
Buildings, Improvements, and Lease Intangibles	68,168
Total real estate properties	75,814
Accumulated Depreciation	$ 11,576
Surgical Centers and Hospitals [Member] | Arizona [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 576
Buildings, Improvements, and Lease Intangibles	5,389
Total real estate properties	5,965
Accumulated Depreciation	$ 1,603
Surgical Centers and Hospitals [Member] | Florida [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 271
Buildings, Improvements, and Lease Intangibles	7,069
Total real estate properties	7,340
Accumulated Depreciation	$ 810
Surgical Centers and Hospitals [Member] | Illinois [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 2,349
Buildings, Improvements, and Lease Intangibles	8,222
Total real estate properties	10,571
Accumulated Depreciation	$ 1,411
Surgical Centers and Hospitals [Member] | Louisiana [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 1,683
Buildings, Improvements, and Lease Intangibles	21,353
Total real estate properties	23,036
Accumulated Depreciation	$ 1,244
Surgical Centers and Hospitals [Member] | Michigan [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 637
Buildings, Improvements, and Lease Intangibles	8,278
Total real estate properties	8,915
Accumulated Depreciation	$ 2,434
Surgical Centers and Hospitals [Member] | Other States [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	7
Land and Land Improvements	$ 2,130
Buildings, Improvements, and Lease Intangibles	17,857
Total real estate properties	19,987
Accumulated Depreciation	$ 4,074
Specialty Centers [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	25
Land and Land Improvements	$ 8,659
Buildings, Improvements, and Lease Intangibles	63,077
Total real estate properties	71,736
Accumulated Depreciation	$ 9,448
Specialty Centers [Member] | Illinois [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	3
Land and Land Improvements	$ 3,489
Buildings, Improvements, and Lease Intangibles	24,733
Total real estate properties	28,222
Accumulated Depreciation	$ 2,117
Specialty Centers [Member] | Other States [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	22
Land and Land Improvements	$ 5,170
Buildings, Improvements, and Lease Intangibles	38,344
Total real estate properties	43,514
Accumulated Depreciation	$ 7,331
Behavioral facilities [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	7
Land and Land Improvements	$ 5,975
Buildings, Improvements, and Lease Intangibles	60,580
Total real estate properties	66,555
Accumulated Depreciation	$ 3,062
Behavioral facilities [Member] | Illinois [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 1,300
Buildings, Improvements, and Lease Intangibles	18,803
Total real estate properties	20,103
Accumulated Depreciation	$ 1,332
Behavioral facilities [Member] | Indiana [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	2
Land and Land Improvements	$ 1,126
Buildings, Improvements, and Lease Intangibles	6,040
Total real estate properties	7,166
Accumulated Depreciation	$ 351
Behavioral facilities [Member] | Other States [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	3
Land and Land Improvements	$ 1,411
Buildings, Improvements, and Lease Intangibles	12,840
Total real estate properties	14,251
Accumulated Depreciation	$ 499
Behavioral facilities [Member] | West Virginia [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 2,138
Buildings, Improvements, and Lease Intangibles	22,897
Total real estate properties	25,035
Accumulated Depreciation	$ 880
Inpatient Rehabilitation Facilities [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 1,515
Buildings, Improvements, and Lease Intangibles	27,001
Total real estate properties	28,516
Accumulated Depreciation	$ 82
Inpatient Rehabilitation Facilities [Member] | Texas [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 1,515
Buildings, Improvements, and Lease Intangibles	27,001
Total real estate properties	28,516
Accumulated Depreciation	$ 82
Long-Term Acute Care Hospitals [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 523
Buildings, Improvements, and Lease Intangibles	14,405
Total real estate properties	14,928
Accumulated Depreciation	$ 1,222
Long-Term Acute Care Hospitals [Member] | Indiana [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	1
Land and Land Improvements	$ 523
Buildings, Improvements, and Lease Intangibles	14,405
Total real estate properties	14,928
Accumulated Depreciation	$ 1,222
Corporate property [Member]
Real Estate Properties [Line Items]
Number of Facilities | real_estate_property	0
Land and Land Improvements	$ 0
Buildings, Improvements, and Lease Intangibles	2,161
Personal Property	135
Total real estate properties	2,296
Accumulated Depreciation	$ 309