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Schedule III - Real Estate and Accumulative Depreciation - Net Carrying Amount (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
property
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Gross Cost Basis at December 31, 2018        
Total $ 15,500,802 $ 15,791,144 $ 3,656,094 $ 3,518,682
Accumulated Depreciation 1,029,386 $ 606,200 $ 188,509 $ 88,577
Net Carrying Amount 14,471,416      
Real Estate tax basis $ 13,200,000      
Minimum | Improvements and buildings        
Gross Cost Basis at December 31, 2018        
Useful life used for depreciation 4 months      
Maximum | Improvements and buildings        
Gross Cost Basis at December 31, 2018        
Useful life used for depreciation 51 years      
Real Estate Held for Investment        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1,251      
Initial Cost        
Encumbrances $ 8,408,958      
Land 1,971,497      
Buildings and Improvements 12,486,269      
Costs Capitalized 97,165      
Gross Cost Basis at December 31, 2018        
Land 1,950,412      
Buildings and Improvements 12,604,519      
Total 14,554,931      
Accumulated Depreciation 935,917      
Net Carrying Amount $ 13,619,014      
Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 413      
Initial Cost        
Encumbrances $ 3,165,680      
Land 456,776      
Buildings and Improvements 4,945,018      
Costs Capitalized (115,740)      
Gross Cost Basis at December 31, 2018        
Land 456,776      
Buildings and Improvements 4,829,278      
Total 5,286,054      
Accumulated Depreciation 290,756      
Net Carrying Amount $ 4,995,298      
Real Estate Held for Investment | Hotel [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 158      
Initial Cost        
Encumbrances $ 2,648,072      
Land 509,971      
Buildings and Improvements 3,424,514      
Costs Capitalized (912)      
Gross Cost Basis at December 31, 2018        
Land 488,886      
Buildings and Improvements 3,444,687      
Total 3,933,573      
Accumulated Depreciation 264,749      
Net Carrying Amount $ 3,668,824      
Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 328      
Initial Cost        
Encumbrances $ 1,077,195      
Land 507,162      
Buildings and Improvements 2,451,084      
Costs Capitalized 101,281      
Gross Cost Basis at December 31, 2018        
Land 507,162      
Buildings and Improvements 2,552,365      
Total 3,059,527      
Accumulated Depreciation 266,523      
Net Carrying Amount $ 2,793,004      
Real Estate Held for Investment | Hotel, Mixed, Industrial, Leisure, Multifamily, Office, Retail And Residential - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 352      
Initial Cost        
Encumbrances $ 1,518,011      
Land 497,588      
Buildings and Improvements 1,665,653      
Costs Capitalized 112,536      
Gross Cost Basis at December 31, 2018        
Land 497,588      
Buildings and Improvements 1,778,189      
Total 2,275,777      
Accumulated Depreciation 113,889      
Net Carrying Amount 2,161,888      
Disposal Group, Held-for-sale, Not Discontinued Operations | Hotel [Member]        
Gross Cost Basis at December 31, 2018        
Net Carrying Amount 69,699      
Disposal Group, Held-for-sale, Not Discontinued Operations | Industrial Property        
Gross Cost Basis at December 31, 2018        
Net Carrying Amount $ 131,400      
ALABAMA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 4,540      
Land 337      
Buildings and Improvements 2,583      
Costs Capitalized 1,469      
Gross Cost Basis at December 31, 2018        
Land 337      
Buildings and Improvements 4,052      
Total 4,389      
Accumulated Depreciation 233      
Net Carrying Amount $ 4,156      
ALABAMA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 31,466      
Land 0      
Buildings and Improvements 56,271      
Costs Capitalized (23,484)      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 32,787      
Total 32,787      
Accumulated Depreciation 3,116      
Net Carrying Amount $ 29,671      
ALABAMA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 9,074      
Land 433      
Buildings and Improvements 7,169      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 433      
Buildings and Improvements 7,169      
Total 7,602      
Accumulated Depreciation 474      
Net Carrying Amount $ 7,128      
ALABAMA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 14,962      
Land 1,134      
Buildings and Improvements 19,213      
Costs Capitalized 651      
Gross Cost Basis at December 31, 2018        
Land 1,134      
Buildings and Improvements 19,864      
Total 20,998      
Accumulated Depreciation 1,404      
Net Carrying Amount $ 19,594      
ARIZONA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 8,998      
Land 536      
Buildings and Improvements 14,434      
Costs Capitalized 1,234      
Gross Cost Basis at December 31, 2018        
Land 536      
Buildings and Improvements 15,668      
Total 16,204      
Accumulated Depreciation 851      
Net Carrying Amount $ 15,353      
ARIZONA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 10,781      
Land 1,043      
Buildings and Improvements 17,013      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 1,043      
Buildings and Improvements 17,013      
Total 18,056      
Accumulated Depreciation 984      
Net Carrying Amount $ 17,072      
ARIZONA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 12,861      
Land 1,897      
Buildings and Improvements 15,843      
Costs Capitalized 249      
Gross Cost Basis at December 31, 2018        
Land 1,897      
Buildings and Improvements 16,092      
Total 17,989      
Accumulated Depreciation 1,146      
Net Carrying Amount $ 16,843      
ARIZONA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 30,561      
Land 7,831      
Buildings and Improvements 34,616      
Costs Capitalized 585      
Gross Cost Basis at December 31, 2018        
Land 7,831      
Buildings and Improvements 35,201      
Total 43,032      
Accumulated Depreciation 3,009      
Net Carrying Amount $ 40,023      
ARIZONA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 41,363      
Land 10,917      
Buildings and Improvements 43,884      
Costs Capitalized 7,124      
Gross Cost Basis at December 31, 2018        
Land 10,917      
Buildings and Improvements 51,008      
Total 61,925      
Accumulated Depreciation 3,596      
Net Carrying Amount $ 58,329      
California | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 103,968      
Land 17,079      
Buildings and Improvements 135,979      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 17,079      
Buildings and Improvements 135,979      
Total 153,058      
Accumulated Depreciation 6,976      
Net Carrying Amount $ 146,082      
California | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 36,361      
Land 12,157      
Buildings and Improvements 76,393      
Costs Capitalized 809      
Gross Cost Basis at December 31, 2018        
Land 12,157      
Buildings and Improvements 77,202      
Total 89,359      
Accumulated Depreciation 4,151      
Net Carrying Amount $ 85,208      
California | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 20,908      
Land 5,708      
Buildings and Improvements 33,859      
Costs Capitalized 982      
Gross Cost Basis at December 31, 2018        
Land 5,708      
Buildings and Improvements 34,841      
Total 40,549      
Accumulated Depreciation 2,139      
Net Carrying Amount $ 38,410      
California | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 19,987      
Land 1,936      
Buildings and Improvements 37,612      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 1,936      
Buildings and Improvements 37,612      
Total 39,548      
Accumulated Depreciation 4,646      
Net Carrying Amount $ 34,902      
California | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 220,715      
Land 59,120      
Buildings and Improvements 241,574      
Costs Capitalized 6,846      
Gross Cost Basis at December 31, 2018        
Land 59,120      
Buildings and Improvements 248,420      
Total 307,540      
Accumulated Depreciation 18,276      
Net Carrying Amount $ 289,264      
California | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 10      
Initial Cost        
Encumbrances $ 202,529      
Land 45,970      
Buildings and Improvements 232,362      
Costs Capitalized 5,248      
Gross Cost Basis at December 31, 2018        
Land 45,970      
Buildings and Improvements 237,610      
Total 283,580      
Accumulated Depreciation 18,215      
Net Carrying Amount $ 265,365      
California | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 21      
Initial Cost        
Encumbrances $ 290,323      
Land 57,970      
Buildings and Improvements 274,907      
Costs Capitalized 19,254      
Gross Cost Basis at December 31, 2018        
Land 57,970      
Buildings and Improvements 294,161      
Total 352,131      
Accumulated Depreciation 20,202      
Net Carrying Amount $ 331,929      
COLORADO | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 104,052      
Land 7,734      
Buildings and Improvements 138,276      
Costs Capitalized 2,228      
Gross Cost Basis at December 31, 2018        
Land 7,734      
Buildings and Improvements 140,504      
Total 148,238      
Accumulated Depreciation 7,574      
Net Carrying Amount $ 140,664      
COLORADO | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 37,735      
Land 8,330      
Buildings and Improvements 57,631      
Costs Capitalized 1,578      
Gross Cost Basis at December 31, 2018        
Land 8,330      
Buildings and Improvements 59,209      
Total 67,539      
Accumulated Depreciation 4,001      
Net Carrying Amount $ 63,538      
COLORADO | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 61,776      
Land 13,163      
Buildings and Improvements 67,804      
Costs Capitalized 5,736      
Gross Cost Basis at December 31, 2018        
Land 13,163      
Buildings and Improvements 73,540      
Total 86,703      
Accumulated Depreciation 5,757      
Net Carrying Amount $ 80,946      
COLORADO | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 15,962      
Land 2,018      
Buildings and Improvements 20,047      
Costs Capitalized 430      
Gross Cost Basis at December 31, 2018        
Land 2,018      
Buildings and Improvements 20,477      
Total 22,495      
Accumulated Depreciation 1,591      
Net Carrying Amount $ 20,904      
FLORIDA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 725      
Land 419      
Buildings and Improvements 303      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 419      
Buildings and Improvements 303      
Total 722      
Accumulated Depreciation 51      
Net Carrying Amount $ 671      
FLORIDA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 23,299      
Land 2,119      
Buildings and Improvements 41,291      
Costs Capitalized (5,226)      
Gross Cost Basis at December 31, 2018        
Land 2,119      
Buildings and Improvements 36,065      
Total 38,184      
Accumulated Depreciation 2,470      
Net Carrying Amount $ 35,714      
FLORIDA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 24      
Initial Cost        
Encumbrances $ 173,422      
Land 25,304      
Buildings and Improvements 347,560      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 25,304      
Buildings and Improvements 347,560      
Total 372,864      
Accumulated Depreciation 19,902      
Net Carrying Amount $ 352,962      
FLORIDA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 12,943      
Land 2,991      
Buildings and Improvements 50,761      
Costs Capitalized 621      
Gross Cost Basis at December 31, 2018        
Land 2,991      
Buildings and Improvements 51,382      
Total 54,373      
Accumulated Depreciation 3,884      
Net Carrying Amount $ 50,489      
FLORIDA | Real Estate Held for Investment | Hotel Full Service        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 45,001      
Land 12,328      
Buildings and Improvements 133,394      
Costs Capitalized 24,026      
Gross Cost Basis at December 31, 2018        
Land 12,328      
Buildings and Improvements 157,420      
Total 169,748      
Accumulated Depreciation 12,072      
Net Carrying Amount $ 157,676      
FLORIDA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 124,232      
Land 16,852      
Buildings and Improvements 219,288      
Costs Capitalized 7,347      
Gross Cost Basis at December 31, 2018        
Land 16,852      
Buildings and Improvements 226,635      
Total 243,487      
Accumulated Depreciation 15,947      
Net Carrying Amount $ 227,540      
FLORIDA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 25,822      
Land 8,508      
Buildings and Improvements 24,764      
Costs Capitalized 4,281      
Gross Cost Basis at December 31, 2018        
Land 8,508      
Buildings and Improvements 29,045      
Total 37,553      
Accumulated Depreciation 2,051      
Net Carrying Amount $ 35,502      
GEORGIA | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 13,566      
Land 2,047      
Buildings and Improvements 16,650      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 2,047      
Buildings and Improvements 16,650      
Total 18,697      
Accumulated Depreciation 855      
Net Carrying Amount $ 17,842      
GEORGIA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 7,227      
Land 516      
Buildings and Improvements 14,220      
Costs Capitalized 314      
Gross Cost Basis at December 31, 2018        
Land 516      
Buildings and Improvements 14,534      
Total 15,050      
Accumulated Depreciation 853      
Net Carrying Amount $ 14,197      
GEORGIA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 13      
Initial Cost        
Encumbrances $ 58,308      
Land 12,976      
Buildings and Improvements 100,200      
Costs Capitalized 2,249      
Gross Cost Basis at December 31, 2018        
Land 12,976      
Buildings and Improvements 102,449      
Total 115,425      
Accumulated Depreciation 6,486      
Net Carrying Amount $ 108,939      
GEORGIA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 7      
Initial Cost        
Encumbrances $ 100,169      
Land 12,140      
Buildings and Improvements 130,707      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 12,140      
Buildings and Improvements 130,707      
Total 142,847      
Accumulated Depreciation 7,270      
Net Carrying Amount $ 135,577      
GEORGIA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 43,517      
Land 7,278      
Buildings and Improvements 52,967      
Costs Capitalized 505      
Gross Cost Basis at December 31, 2018        
Land 7,278      
Buildings and Improvements 53,472      
Total 60,750      
Accumulated Depreciation 3,760      
Net Carrying Amount $ 56,990      
GEORGIA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 58,264      
Land 11,505      
Buildings and Improvements 77,275      
Costs Capitalized (6,466)      
Gross Cost Basis at December 31, 2018        
Land 9,932      
Buildings and Improvements 72,382      
Total 82,314      
Accumulated Depreciation 6,012      
Net Carrying Amount $ 76,302      
GEORGIA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 10,753      
Land 1,905      
Buildings and Improvements 9,296      
Costs Capitalized 751      
Gross Cost Basis at December 31, 2018        
Land 1,905      
Buildings and Improvements 10,047      
Total 11,952      
Accumulated Depreciation 759      
Net Carrying Amount $ 11,193      
ILLINOIS | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 23      
Initial Cost        
Encumbrances $ 161,951      
Land 9,433      
Buildings and Improvements 289,465      
Costs Capitalized 6,289      
Gross Cost Basis at December 31, 2018        
Land 9,433      
Buildings and Improvements 295,754      
Total 305,187      
Accumulated Depreciation 16,235      
Net Carrying Amount $ 288,952      
ILLINOIS | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 63,246      
Land 9,809      
Buildings and Improvements 97,777      
Costs Capitalized 43      
Gross Cost Basis at December 31, 2018        
Land 9,809      
Buildings and Improvements 97,820      
Total 107,629      
Accumulated Depreciation 6,018      
Net Carrying Amount $ 101,611      
ILLINOIS | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 54,744      
Land 6,546      
Buildings and Improvements 137,591      
Costs Capitalized (62,141)      
Gross Cost Basis at December 31, 2018        
Land 6,546      
Buildings and Improvements 75,450      
Total 81,996      
Accumulated Depreciation 7,871      
Net Carrying Amount $ 74,125      
ILLINOIS | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 27,884      
Land 4,375      
Buildings and Improvements 34,567      
Costs Capitalized 317      
Gross Cost Basis at December 31, 2018        
Land 4,375      
Buildings and Improvements 34,884      
Total 39,259      
Accumulated Depreciation 2,729      
Net Carrying Amount $ 36,530      
ILLINOIS | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 18,501      
Land 2,738      
Buildings and Improvements 22,368      
Costs Capitalized 801      
Gross Cost Basis at December 31, 2018        
Land 2,738      
Buildings and Improvements 23,169      
Total 25,907      
Accumulated Depreciation 1,678      
Net Carrying Amount $ 24,229      
ILLINOIS | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 28,805      
Land 4,553      
Buildings and Improvements 30,274      
Costs Capitalized 261      
Gross Cost Basis at December 31, 2018        
Land 4,553      
Buildings and Improvements 30,535      
Total 35,088      
Accumulated Depreciation 2,672      
Net Carrying Amount $ 32,416      
INDIANA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 9      
Initial Cost        
Encumbrances $ 25,835      
Land 7,170      
Buildings and Improvements 26,900      
Costs Capitalized 100      
Gross Cost Basis at December 31, 2018        
Land 7,170      
Buildings and Improvements 27,000      
Total 34,170      
Accumulated Depreciation 1,826      
Net Carrying Amount $ 32,344      
INDIANA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 27      
Initial Cost        
Encumbrances $ 178,317      
Land 18,106      
Buildings and Improvements 297,968      
Costs Capitalized (5,048)      
Gross Cost Basis at December 31, 2018        
Land 18,106      
Buildings and Improvements 292,920      
Total 311,026      
Accumulated Depreciation 19,388      
Net Carrying Amount $ 291,638      
INDIANA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 19      
Initial Cost        
Encumbrances $ 95,295      
Land 5,634      
Buildings and Improvements 132,921      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 5,634      
Buildings and Improvements 132,921      
Total 138,555      
Accumulated Depreciation 8,404      
Net Carrying Amount $ 130,151      
INDIANA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 9,183      
Land 1,232      
Buildings and Improvements 9,325      
Costs Capitalized 410      
Gross Cost Basis at December 31, 2018        
Land 1,232      
Buildings and Improvements 9,735      
Total 10,967      
Accumulated Depreciation 693      
Net Carrying Amount $ 10,274      
KANSAS | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 6,128      
Land 915      
Buildings and Improvements 12,105      
Costs Capitalized (5,203)      
Gross Cost Basis at December 31, 2018        
Land 915      
Buildings and Improvements 6,902      
Total 7,817      
Accumulated Depreciation 768      
Net Carrying Amount $ 7,049      
KANSAS | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 4,866      
Land 517      
Buildings and Improvements 4,930      
Costs Capitalized 1,065      
Gross Cost Basis at December 31, 2018        
Land 517      
Buildings and Improvements 5,995      
Total 6,512      
Accumulated Depreciation 498      
Net Carrying Amount $ 6,014      
MASSACHUSETTS | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 9,900      
Land 1,346      
Buildings and Improvements 1,523      
Costs Capitalized 198      
Gross Cost Basis at December 31, 2018        
Land 1,346      
Buildings and Improvements 1,721      
Total 3,067      
Accumulated Depreciation 182      
Net Carrying Amount $ 2,885      
MASSACHUSETTS | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 17,145      
Land 6,179      
Buildings and Improvements 8,966      
Costs Capitalized (960)      
Gross Cost Basis at December 31, 2018        
Land 6,179      
Buildings and Improvements 8,006      
Total 14,185      
Accumulated Depreciation 434      
Net Carrying Amount $ 13,751      
MASSACHUSETTS | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 60,054      
Land 8,274      
Buildings and Improvements 74,973      
Costs Capitalized 637      
Gross Cost Basis at December 31, 2018        
Land 8,274      
Buildings and Improvements 75,610      
Total 83,884      
Accumulated Depreciation 5,294      
Net Carrying Amount $ 78,590      
MASSACHUSETTS | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 25,131      
Land 3,272      
Buildings and Improvements 31,343      
Costs Capitalized 490      
Gross Cost Basis at December 31, 2018        
Land 3,272      
Buildings and Improvements 31,833      
Total 35,105      
Accumulated Depreciation 2,194      
Net Carrying Amount $ 32,911      
MASSACHUSETTS | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 9,183      
Land 1,152      
Buildings and Improvements 9,261      
Costs Capitalized 1,846      
Gross Cost Basis at December 31, 2018        
Land 1,152      
Buildings and Improvements 11,107      
Total 12,259      
Accumulated Depreciation 721      
Net Carrying Amount $ 11,538      
MINNESOTA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 11      
Initial Cost        
Encumbrances $ 31,436      
Land 3,763      
Buildings and Improvements 66,922      
Costs Capitalized (27,784)      
Gross Cost Basis at December 31, 2018        
Land 3,763      
Buildings and Improvements 39,138      
Total 42,901      
Accumulated Depreciation 3,669      
Net Carrying Amount $ 39,232      
MINNESOTA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 6,828      
Land 1,144      
Buildings and Improvements 9,348      
Costs Capitalized 126      
Gross Cost Basis at December 31, 2018        
Land 1,144      
Buildings and Improvements 9,474      
Total 10,618      
Accumulated Depreciation 598      
Net Carrying Amount $ 10,020      
NORTH CAROLINA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 99,712      
Land 11,656      
Buildings and Improvements 151,555      
Costs Capitalized 297      
Gross Cost Basis at December 31, 2018        
Land 11,656      
Buildings and Improvements 151,852      
Total 163,508      
Accumulated Depreciation 8,141      
Net Carrying Amount $ 155,367      
NORTH CAROLINA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 5,735      
Land 286      
Buildings and Improvements 10,549      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 286      
Buildings and Improvements 10,549      
Total 10,835      
Accumulated Depreciation 622      
Net Carrying Amount $ 10,213      
NORTH CAROLINA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 18,108      
Land 1,693      
Buildings and Improvements 23,893      
Costs Capitalized 423      
Gross Cost Basis at December 31, 2018        
Land 1,693      
Buildings and Improvements 24,316      
Total 26,009      
Accumulated Depreciation 2,295      
Net Carrying Amount $ 23,714      
NORTH CAROLINA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 100,253      
Land 13,689      
Buildings and Improvements 123,653      
Costs Capitalized 3,224      
Gross Cost Basis at December 31, 2018        
Land 13,689      
Buildings and Improvements 126,877      
Total 140,566      
Accumulated Depreciation 9,260      
Net Carrying Amount $ 131,306      
NEBRASKA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 2,602      
Land 559      
Buildings and Improvements 3,161      
Costs Capitalized 104      
Gross Cost Basis at December 31, 2018        
Land 559      
Buildings and Improvements 3,265      
Total 3,824      
Accumulated Depreciation 207      
Net Carrying Amount $ 3,617      
OHIO | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 30      
Initial Cost        
Encumbrances $ 186,107      
Land 16,108      
Buildings and Improvements 247,227      
Costs Capitalized 2,705      
Gross Cost Basis at December 31, 2018        
Land 16,108      
Buildings and Improvements 249,932      
Total 266,040      
Accumulated Depreciation 14,253      
Net Carrying Amount $ 251,787      
OHIO | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 48,534      
Land 5,036      
Buildings and Improvements 99,147      
Costs Capitalized (10,879)      
Gross Cost Basis at December 31, 2018        
Land 5,036      
Buildings and Improvements 88,268      
Total 93,304      
Accumulated Depreciation 5,865      
Net Carrying Amount $ 87,439      
OHIO | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 8,761      
Land 575      
Buildings and Improvements 11,747      
Costs Capitalized 235      
Gross Cost Basis at December 31, 2018        
Land 575      
Buildings and Improvements 11,982      
Total 12,557      
Accumulated Depreciation 1,080      
Net Carrying Amount $ 11,477      
OHIO | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 16,534      
Land 7,655      
Buildings and Improvements 56,496      
Costs Capitalized (40,120)      
Gross Cost Basis at December 31, 2018        
Land 2,633      
Buildings and Improvements 21,398      
Total 24,031      
Accumulated Depreciation 1,693      
Net Carrying Amount $ 22,338      
OHIO | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 7      
Initial Cost        
Encumbrances $ 24,488      
Land 4,557      
Buildings and Improvements 31,786      
Costs Capitalized 4,554      
Gross Cost Basis at December 31, 2018        
Land 4,557      
Buildings and Improvements 36,340      
Total 40,897      
Accumulated Depreciation 3,127      
Net Carrying Amount $ 37,770      
OKLAHOMA | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 11,499      
Land 536      
Buildings and Improvements 15,954      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 536      
Buildings and Improvements 15,954      
Total 16,490      
Accumulated Depreciation 811      
Net Carrying Amount $ 15,679      
OKLAHOMA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 10,580      
Land 1,419      
Buildings and Improvements 17,467      
Costs Capitalized 1,400      
Gross Cost Basis at December 31, 2018        
Land 1,419      
Buildings and Improvements 18,867      
Total 20,286      
Accumulated Depreciation 1,370      
Net Carrying Amount $ 18,916      
OKLAHOMA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 11,865      
Land 0      
Buildings and Improvements 18,382      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 18,382      
Total 18,382      
Accumulated Depreciation 1,114      
Net Carrying Amount $ 17,268      
OKLAHOMA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 4,569      
Land 447      
Buildings and Improvements 5,387      
Costs Capitalized 767      
Gross Cost Basis at December 31, 2018        
Land 447      
Buildings and Improvements 6,154      
Total 6,601      
Accumulated Depreciation 615      
Net Carrying Amount $ 5,986      
OKLAHOMA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 2,826      
Land 0      
Buildings and Improvements 4,751      
Costs Capitalized 42      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 4,793      
Total 4,793      
Accumulated Depreciation 488      
Net Carrying Amount $ 4,305      
OREGON | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 25      
Initial Cost        
Encumbrances $ 181,352      
Land 20,905      
Buildings and Improvements 269,521      
Costs Capitalized (2,254)      
Gross Cost Basis at December 31, 2018        
Land 20,905      
Buildings and Improvements 267,267      
Total 288,172      
Accumulated Depreciation 15,364      
Net Carrying Amount $ 272,808      
OREGON | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 26,190      
Land 4,330      
Buildings and Improvements 38,024      
Costs Capitalized (6,359)      
Gross Cost Basis at December 31, 2018        
Land 4,330      
Buildings and Improvements 31,665      
Total 35,995      
Accumulated Depreciation 2,238      
Net Carrying Amount $ 33,757      
OREGON | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 16,247      
Land 2,413      
Buildings and Improvements 12,142      
Costs Capitalized 71      
Gross Cost Basis at December 31, 2018        
Land 2,413      
Buildings and Improvements 12,213      
Total 14,626      
Accumulated Depreciation 796      
Net Carrying Amount $ 13,830      
SOUTH CAROLINA | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 16,183      
Land 1,105      
Buildings and Improvements 17,975      
Costs Capitalized 238      
Gross Cost Basis at December 31, 2018        
Land 1,105      
Buildings and Improvements 18,213      
Total 19,318      
Accumulated Depreciation 1,022      
Net Carrying Amount $ 18,296      
SOUTH CAROLINA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 9,681      
Land 761      
Buildings and Improvements 22,966      
Costs Capitalized (5,174)      
Gross Cost Basis at December 31, 2018        
Land 761      
Buildings and Improvements 17,792      
Total 18,553      
Accumulated Depreciation 1,496      
Net Carrying Amount $ 17,057      
TENNESSEE | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 12,269      
Land 2,179      
Buildings and Improvements 24,880      
Costs Capitalized 735      
Gross Cost Basis at December 31, 2018        
Land 2,179      
Buildings and Improvements 25,615      
Total 27,794      
Accumulated Depreciation 1,487      
Net Carrying Amount $ 26,307      
TENNESSEE | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 11,342      
Land 449      
Buildings and Improvements 20,215      
Costs Capitalized (3,887)      
Gross Cost Basis at December 31, 2018        
Land 449      
Buildings and Improvements 16,328      
Total 16,777      
Accumulated Depreciation 1,201      
Net Carrying Amount $ 15,576      
TENNESSEE | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 40,869      
Land 4,236      
Buildings and Improvements 62,156      
Costs Capitalized 2,975      
Gross Cost Basis at December 31, 2018        
Land 4,236      
Buildings and Improvements 65,131      
Total 69,367      
Accumulated Depreciation 3,545      
Net Carrying Amount $ 65,822      
TENNESSEE | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 23,898      
Land 4,118      
Buildings and Improvements 28,471      
Costs Capitalized 912      
Gross Cost Basis at December 31, 2018        
Land 4,118      
Buildings and Improvements 29,383      
Total 33,501      
Accumulated Depreciation 2,150      
Net Carrying Amount $ 31,351      
TENNESSEE | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 35,092      
Land 5,699      
Buildings and Improvements 42,462      
Costs Capitalized 1,284      
Gross Cost Basis at December 31, 2018        
Land 5,699      
Buildings and Improvements 43,746      
Total 49,445      
Accumulated Depreciation 3,489      
Net Carrying Amount $ 45,956      
TENNESSEE | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 9,575      
Land 2,020      
Buildings and Improvements 8,803      
Costs Capitalized 58      
Gross Cost Basis at December 31, 2018        
Land 2,020      
Buildings and Improvements 8,861      
Total 10,881      
Accumulated Depreciation 713      
Net Carrying Amount $ 10,168      
TEXAS | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 35,222      
Land 3,191      
Buildings and Improvements 52,444      
Costs Capitalized 2,037      
Gross Cost Basis at December 31, 2018        
Land 3,191      
Buildings and Improvements 54,481      
Total 57,672      
Accumulated Depreciation 2,699      
Net Carrying Amount $ 54,973      
TEXAS | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 119,707      
Land 18,144      
Buildings and Improvements 138,400      
Costs Capitalized 4,495      
Gross Cost Basis at December 31, 2018        
Land 18,144      
Buildings and Improvements 142,895      
Total 161,039      
Accumulated Depreciation 8,422      
Net Carrying Amount $ 152,617      
TEXAS | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 21      
Initial Cost        
Encumbrances $ 102,014      
Land 5,808      
Buildings and Improvements 169,067      
Costs Capitalized 1,353      
Gross Cost Basis at December 31, 2018        
Land 5,808      
Buildings and Improvements 170,420      
Total 176,228      
Accumulated Depreciation 12,135      
Net Carrying Amount $ 164,093      
TEXAS | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 11      
Initial Cost        
Encumbrances $ 137,555      
Land 19,932      
Buildings and Improvements 165,947      
Costs Capitalized 9,474      
Gross Cost Basis at December 31, 2018        
Land 19,932      
Buildings and Improvements 175,421      
Total 195,353      
Accumulated Depreciation 14,905      
Net Carrying Amount $ 180,448      
TEXAS | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 15      
Initial Cost        
Encumbrances $ 132,938      
Land 27,974      
Buildings and Improvements 177,156      
Costs Capitalized (13,879)      
Gross Cost Basis at December 31, 2018        
Land 24,389      
Buildings and Improvements 166,862      
Total 191,251      
Accumulated Depreciation 16,039      
Net Carrying Amount $ 175,212      
TEXAS | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 14      
Initial Cost        
Encumbrances $ 115,140      
Land 16,720      
Buildings and Improvements 90,428      
Costs Capitalized 10,909      
Gross Cost Basis at December 31, 2018        
Land 16,720      
Buildings and Improvements 101,337      
Total 118,057      
Accumulated Depreciation 6,738      
Net Carrying Amount $ 111,319      
WASHINGTON | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 45,483      
Land 3,765      
Buildings and Improvements 68,188      
Costs Capitalized 757      
Gross Cost Basis at December 31, 2018        
Land 3,765      
Buildings and Improvements 68,945      
Total 72,710      
Accumulated Depreciation 3,824      
Net Carrying Amount $ 68,886      
WASHINGTON | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 22,470      
Land 998      
Buildings and Improvements 47,052      
Costs Capitalized 89      
Gross Cost Basis at December 31, 2018        
Land 998      
Buildings and Improvements 47,141      
Total 48,139      
Accumulated Depreciation 2,647      
Net Carrying Amount $ 45,492      
WASHINGTON | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 13,927      
Land 3,647      
Buildings and Improvements 16,108      
Costs Capitalized (1,263)      
Gross Cost Basis at December 31, 2018        
Land 3,647      
Buildings and Improvements 14,845      
Total 18,492      
Accumulated Depreciation 1,062      
Net Carrying Amount $ 17,430      
WASHINGTON | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 102,182      
Land 22,388      
Buildings and Improvements 116,391      
Costs Capitalized 3,036      
Gross Cost Basis at December 31, 2018        
Land 22,388      
Buildings and Improvements 119,427      
Total 141,815      
Accumulated Depreciation 7,931      
Net Carrying Amount $ 133,884      
WASHINGTON | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 28,786      
Land 2,125      
Buildings and Improvements 36,312      
Costs Capitalized 368      
Gross Cost Basis at December 31, 2018        
Land 2,125      
Buildings and Improvements 36,680      
Total 38,805      
Accumulated Depreciation 1,107      
Net Carrying Amount $ 37,698      
UNITED KINGDOM | Real Estate Held for Investment | Assisted Living Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 45      
Initial Cost        
Encumbrances $ 272,529      
Land 124,664      
Buildings and Improvements 492,612      
Costs Capitalized 20,957      
Gross Cost Basis at December 31, 2018        
Land 124,664      
Buildings and Improvements 513,569      
Total 638,233      
Accumulated Depreciation 25,107      
Net Carrying Amount $ 613,126      
UNITED KINGDOM | Real Estate Held for Investment | Retail - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 8,405      
Land 911      
Buildings and Improvements 11,766      
Costs Capitalized (3,705)      
Gross Cost Basis at December 31, 2018        
Land 911      
Buildings and Improvements 8,061      
Total 8,972      
Accumulated Depreciation 1,563      
Net Carrying Amount $ 7,409      
LOUISIANA | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 11,993      
Land 1,591      
Buildings and Improvements 13,991      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 1,591      
Buildings and Improvements 13,991      
Total 15,582      
Accumulated Depreciation 713      
Net Carrying Amount $ 14,869      
LOUISIANA | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 33,777      
Land 2,406      
Buildings and Improvements 52,423      
Costs Capitalized (5,421)      
Gross Cost Basis at December 31, 2018        
Land 2,406      
Buildings and Improvements 47,002      
Total 49,408      
Accumulated Depreciation 3,332      
Net Carrying Amount $ 46,076      
LOUISIANA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 18,866      
Land 1,068      
Buildings and Improvements 28,675      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 1,068      
Buildings and Improvements 28,675      
Total 29,743      
Accumulated Depreciation 1,637      
Net Carrying Amount $ 28,106      
LOUISIANA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 12,168      
Land 1,874      
Buildings and Improvements 15,043      
Costs Capitalized 719      
Gross Cost Basis at December 31, 2018        
Land 1,874      
Buildings and Improvements 15,762      
Total 17,636      
Accumulated Depreciation 1,683      
Net Carrying Amount $ 15,953      
LOUISIANA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 19,355      
Land 2,409      
Buildings and Improvements 23,780      
Costs Capitalized 1,534      
Gross Cost Basis at December 31, 2018        
Land 2,409      
Buildings and Improvements 25,314      
Total 27,723      
Accumulated Depreciation 2,376      
Net Carrying Amount $ 25,347      
MISSOURI | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 31,264      
Land 3,586      
Buildings and Improvements 22,684      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 3,586      
Buildings and Improvements 22,684      
Total 26,270      
Accumulated Depreciation 1,209      
Net Carrying Amount $ 25,061      
MISSOURI | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 4,788      
Land 471      
Buildings and Improvements 5,597      
Costs Capitalized 561      
Gross Cost Basis at December 31, 2018        
Land 471      
Buildings and Improvements 6,158      
Total 6,629      
Accumulated Depreciation 509      
Net Carrying Amount $ 6,120      
UTAH | Real Estate Held for Investment | Hospitals [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 14,464      
Land 2,151      
Buildings and Improvements 7,073      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 2,151      
Buildings and Improvements 7,073      
Total 9,224      
Accumulated Depreciation 374      
Net Carrying Amount $ 8,850      
ARKANSAS | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 494      
Land 0      
Buildings and Improvements 1,343      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 1,343      
Total 1,343      
Accumulated Depreciation 200      
Net Carrying Amount $ 1,143      
HAWAII | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 8,175      
Land 519      
Buildings and Improvements 14,030      
Costs Capitalized 4      
Gross Cost Basis at December 31, 2018        
Land 519      
Buildings and Improvements 14,034      
Total 14,553      
Accumulated Depreciation 732      
Net Carrying Amount $ 13,821      
IDAHO | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 22,459      
Land 0      
Buildings and Improvements 30,473      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 30,473      
Total 30,473      
Accumulated Depreciation 1,769      
Net Carrying Amount $ 28,704      
MICHIGAN | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 31,508      
Land 3,856      
Buildings and Improvements 48,736      
Costs Capitalized (9,680)      
Gross Cost Basis at December 31, 2018        
Land 3,856      
Buildings and Improvements 39,056      
Total 42,912      
Accumulated Depreciation 2,849      
Net Carrying Amount $ 40,063      
MICHIGAN | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 8,188      
Land 1,717      
Buildings and Improvements 13,988      
Costs Capitalized 1      
Gross Cost Basis at December 31, 2018        
Land 1,717      
Buildings and Improvements 13,989      
Total 15,706      
Accumulated Depreciation 857      
Net Carrying Amount $ 14,849      
MICHIGAN | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 32,982      
Land 4,521      
Buildings and Improvements 39,797      
Costs Capitalized 1,776      
Gross Cost Basis at December 31, 2018        
Land 4,521      
Buildings and Improvements 41,573      
Total 46,094      
Accumulated Depreciation 2,880      
Net Carrying Amount $ 43,214      
MICHIGAN | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 79,189      
Land 10,430      
Buildings and Improvements 97,029      
Costs Capitalized 3,738      
Gross Cost Basis at December 31, 2018        
Land 10,430      
Buildings and Improvements 100,767      
Total 111,197      
Accumulated Depreciation 7,487      
Net Carrying Amount $ 103,710      
MICHIGAN | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 23,860      
Land 3,276      
Buildings and Improvements 22,820      
Costs Capitalized 773      
Gross Cost Basis at December 31, 2018        
Land 3,276      
Buildings and Improvements 23,593      
Total 26,869      
Accumulated Depreciation 1,815      
Net Carrying Amount $ 25,054      
MISSISSIPPI | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 13,720      
Land 0      
Buildings and Improvements 21,465      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 21,465      
Total 21,465      
Accumulated Depreciation 1,353      
Net Carrying Amount $ 20,112      
NEW MEXICO | Real Estate Held for Investment | Medical Office Buildings        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 14,751      
Land 0      
Buildings and Improvements 16,344      
Costs Capitalized 173      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 16,517      
Total 16,517      
Accumulated Depreciation 1,772      
Net Carrying Amount $ 14,745      
NEW MEXICO | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 17,594      
Land 2,125      
Buildings and Improvements 22,446      
Costs Capitalized 733      
Gross Cost Basis at December 31, 2018        
Land 2,125      
Buildings and Improvements 23,179      
Total 25,304      
Accumulated Depreciation 2,262      
Net Carrying Amount $ 23,042      
KENTUCKY | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 8,979      
Land 362      
Buildings and Improvements 17,493      
Costs Capitalized 3,084      
Gross Cost Basis at December 31, 2018        
Land 362      
Buildings and Improvements 20,577      
Total 20,939      
Accumulated Depreciation 1,195      
Net Carrying Amount $ 19,744      
KENTUCKY | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 16,809      
Land 2,956      
Buildings and Improvements 29,407      
Costs Capitalized (8,126)      
Gross Cost Basis at December 31, 2018        
Land 2,956      
Buildings and Improvements 21,281      
Total 24,237      
Accumulated Depreciation 2,169      
Net Carrying Amount $ 22,068      
KENTUCKY | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 29,201      
Land 6,660      
Buildings and Improvements 31,618      
Costs Capitalized 2,456      
Gross Cost Basis at December 31, 2018        
Land 6,660      
Buildings and Improvements 34,074      
Total 40,734      
Accumulated Depreciation 2,483      
Net Carrying Amount $ 38,251      
KENTUCKY | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 6,122      
Land 1,358      
Buildings and Improvements 5,576      
Costs Capitalized 11      
Gross Cost Basis at December 31, 2018        
Land 1,358      
Buildings and Improvements 5,587      
Total 6,945      
Accumulated Depreciation 429      
Net Carrying Amount $ 6,516      
MARYLAND | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 6,908      
Land 1,219      
Buildings and Improvements 14,556      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 1,219      
Buildings and Improvements 14,556      
Total 15,775      
Accumulated Depreciation 836      
Net Carrying Amount $ 14,939      
MARYLAND | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 19,889      
Land 3,003      
Buildings and Improvements 24,644      
Costs Capitalized 302      
Gross Cost Basis at December 31, 2018        
Land 3,003      
Buildings and Improvements 24,946      
Total 27,949      
Accumulated Depreciation 1,903      
Net Carrying Amount $ 26,046      
MARYLAND | Real Estate Held for Investment | Hotel Full Service        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 11,765      
Land 3,086      
Buildings and Improvements 12,964      
Costs Capitalized 276      
Gross Cost Basis at December 31, 2018        
Land 3,086      
Buildings and Improvements 13,240      
Total 16,326      
Accumulated Depreciation 918      
Net Carrying Amount $ 15,408      
MARYLAND | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 39,090      
Land 10,405      
Buildings and Improvements 78,892      
Costs Capitalized (34,838)      
Gross Cost Basis at December 31, 2018        
Land 4,994      
Buildings and Improvements 49,465      
Total 54,459      
Accumulated Depreciation 3,267      
Net Carrying Amount $ 51,192      
PENNSYLVANIA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 11      
Initial Cost        
Encumbrances $ 188,683      
Land 20,010      
Buildings and Improvements 240,922      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 20,010      
Buildings and Improvements 240,922      
Total 260,932      
Accumulated Depreciation 13,747      
Net Carrying Amount $ 247,185      
PENNSYLVANIA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 30,727      
Land 4,526      
Buildings and Improvements 36,759      
Costs Capitalized 1,925      
Gross Cost Basis at December 31, 2018        
Land 4,526      
Buildings and Improvements 38,684      
Total 43,210      
Accumulated Depreciation 2,630      
Net Carrying Amount $ 40,580      
PENNSYLVANIA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 41,918      
Land 7,469      
Buildings and Improvements 47,626      
Costs Capitalized 3,641      
Gross Cost Basis at December 31, 2018        
Land 7,469      
Buildings and Improvements 51,267      
Total 58,736      
Accumulated Depreciation 3,841      
Net Carrying Amount $ 54,895      
PENNSYLVANIA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 60,592      
Land 12,148      
Buildings and Improvements 71,347      
Costs Capitalized 4,238      
Gross Cost Basis at December 31, 2018        
Land 12,148      
Buildings and Improvements 75,585      
Total 87,733      
Accumulated Depreciation 5,689      
Net Carrying Amount $ 82,044      
VIRGINIA | Real Estate Held for Investment | Skilled Nursing Facilities        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 50,168      
Land 7,650      
Buildings and Improvements 88,135      
Costs Capitalized 0      
Gross Cost Basis at December 31, 2018        
Land 7,650      
Buildings and Improvements 88,135      
Total 95,785      
Accumulated Depreciation 5,124      
Net Carrying Amount $ 90,661      
VIRGINIA | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 33,075      
Land 5,981      
Buildings and Improvements 38,545      
Costs Capitalized 2,375      
Gross Cost Basis at December 31, 2018        
Land 5,981      
Buildings and Improvements 40,920      
Total 46,901      
Accumulated Depreciation 3,346      
Net Carrying Amount $ 43,555      
VIRGINIA | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 101,057      
Land 23,071      
Buildings and Improvements 140,115      
Costs Capitalized (21,833)      
Gross Cost Basis at December 31, 2018        
Land 17,577      
Buildings and Improvements 123,776      
Total 141,353      
Accumulated Depreciation 9,009      
Net Carrying Amount $ 132,344      
VIRGINIA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 38,459      
Land 8,446      
Buildings and Improvements 37,575      
Costs Capitalized 171      
Gross Cost Basis at December 31, 2018        
Land 8,446      
Buildings and Improvements 37,746      
Total 46,192      
Accumulated Depreciation 2,733      
Net Carrying Amount $ 43,459      
Atlanta | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 50      
Initial Cost        
Encumbrances $ 200,821      
Land 52,210      
Buildings and Improvements 345,503      
Costs Capitalized 11,278      
Gross Cost Basis at December 31, 2018        
Land 52,210      
Buildings and Improvements 356,781      
Total 408,991      
Accumulated Depreciation 43,624      
Net Carrying Amount $ 365,367      
Austin, TX | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 0      
Land 9,174      
Buildings and Improvements 60,537      
Costs Capitalized 955      
Gross Cost Basis at December 31, 2018        
Land 9,174      
Buildings and Improvements 61,492      
Total 70,666      
Accumulated Depreciation 6,066      
Net Carrying Amount $ 64,600      
Chicago | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 25      
Initial Cost        
Encumbrances $ 0      
Land 29,857      
Buildings and Improvements 116,251      
Costs Capitalized 7,549      
Gross Cost Basis at December 31, 2018        
Land 29,857      
Buildings and Improvements 123,800      
Total 153,657      
Accumulated Depreciation 19,082      
Net Carrying Amount $ 134,575      
Dallas | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 59      
Initial Cost        
Encumbrances $ 192,007      
Land 69,662      
Buildings and Improvements 335,274      
Costs Capitalized 11,673      
Gross Cost Basis at December 31, 2018        
Land 69,662      
Buildings and Improvements 346,947      
Total 416,609      
Accumulated Depreciation 44,688      
Net Carrying Amount $ 371,921      
Denver CO | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 38,689      
Land 14,253      
Buildings and Improvements 60,415      
Costs Capitalized 4,359      
Gross Cost Basis at December 31, 2018        
Land 14,253      
Buildings and Improvements 64,774      
Total 79,027      
Accumulated Depreciation 7,565      
Net Carrying Amount $ 71,462      
Houston | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 21,446      
Land 20,934      
Buildings and Improvements 109,946      
Costs Capitalized 2,980      
Gross Cost Basis at December 31, 2018        
Land 20,934      
Buildings and Improvements 112,926      
Total 133,860      
Accumulated Depreciation 13,147      
Net Carrying Amount $ 120,713      
Jacksonville | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 13      
Initial Cost        
Encumbrances $ 5,474      
Land 21,565      
Buildings and Improvements 103,560      
Costs Capitalized 12,400      
Gross Cost Basis at December 31, 2018        
Land 21,565      
Buildings and Improvements 115,960      
Total 137,525      
Accumulated Depreciation 3,755      
Net Carrying Amount $ 133,770      
Kansas City | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 14      
Initial Cost        
Encumbrances $ 49,000      
Land 13,423      
Buildings and Improvements 75,709      
Costs Capitalized 3,635      
Gross Cost Basis at December 31, 2018        
Land 13,423      
Buildings and Improvements 79,344      
Total 92,767      
Accumulated Depreciation 9,902      
Net Carrying Amount $ 82,865      
Las Vegas | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 0      
Land 24,553      
Buildings and Improvements 77,093      
Costs Capitalized 11,394      
Gross Cost Basis at December 31, 2018        
Land 24,553      
Buildings and Improvements 88,487      
Total 113,040      
Accumulated Depreciation 2,670      
Net Carrying Amount $ 110,370      
Maryland-BWI | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 20      
Initial Cost        
Encumbrances $ 113,198      
Land 51,042      
Buildings and Improvements 170,623      
Costs Capitalized 1,537      
Gross Cost Basis at December 31, 2018        
Land 51,042      
Buildings and Improvements 172,160      
Total 223,202      
Accumulated Depreciation 11,158      
Net Carrying Amount $ 212,044      
Minneapolis | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 13      
Initial Cost        
Encumbrances $ 102,755      
Land 23,064      
Buildings and Improvements 130,113      
Costs Capitalized 6,258      
Gross Cost Basis at December 31, 2018        
Land 23,064      
Buildings and Improvements 136,371      
Total 159,435      
Accumulated Depreciation 19,831      
Net Carrying Amount $ 139,604      
New Jersey, Northern | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 10      
Initial Cost        
Encumbrances $ 0      
Land 20,133      
Buildings and Improvements 70,432      
Costs Capitalized 812      
Gross Cost Basis at December 31, 2018        
Land 20,133      
Buildings and Improvements 71,244      
Total 91,377      
Accumulated Depreciation 1,645      
Net Carrying Amount $ 89,732      
New Jersey, South Philadelphia | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 24      
Initial Cost        
Encumbrances $ 58,852      
Land 34,023      
Buildings and Improvements 135,624      
Costs Capitalized 4,680      
Gross Cost Basis at December 31, 2018        
Land 34,023      
Buildings and Improvements 140,304      
Total 174,327      
Accumulated Depreciation 22,618      
Net Carrying Amount $ 151,709      
Oakland | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 60,000      
Land 20,648      
Buildings and Improvements 74,993      
Costs Capitalized 1,660      
Gross Cost Basis at December 31, 2018        
Land 20,648      
Buildings and Improvements 76,653      
Total 97,301      
Accumulated Depreciation 1,907      
Net Carrying Amount $ 95,394      
Orlando | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 16      
Initial Cost        
Encumbrances $ 131,500      
Land 27,610      
Buildings and Improvements 180,144      
Costs Capitalized 5,996      
Gross Cost Basis at December 31, 2018        
Land 27,610      
Buildings and Improvements 186,140      
Total 213,750      
Accumulated Depreciation 17,726      
Net Carrying Amount $ 196,024      
Phoenix | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 22      
Initial Cost        
Encumbrances $ 59,000      
Land 31,983      
Buildings and Improvements 181,795      
Costs Capitalized 5,068      
Gross Cost Basis at December 31, 2018        
Land 31,983      
Buildings and Improvements 186,863      
Total 218,846      
Accumulated Depreciation 16,429      
Net Carrying Amount $ 202,417      
Salt Lake City | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 15      
Initial Cost        
Encumbrances $ 44,453      
Land 18,892      
Buildings and Improvements 85,594      
Costs Capitalized 3,131      
Gross Cost Basis at December 31, 2018        
Land 18,892      
Buildings and Improvements 88,725      
Total 107,617      
Accumulated Depreciation 10,206      
Net Carrying Amount $ 97,411      
San Antonio | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 0      
Land 11,045      
Buildings and Improvements 61,638      
Costs Capitalized 459      
Gross Cost Basis at December 31, 2018        
Land 11,045      
Buildings and Improvements 62,097      
Total 73,142      
Accumulated Depreciation 1,596      
Net Carrying Amount $ 71,546      
St Louis, MO | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 0      
Land 8,813      
Buildings and Improvements 43,702      
Costs Capitalized 3,140      
Gross Cost Basis at December 31, 2018        
Land 8,813      
Buildings and Improvements 46,842      
Total 55,655      
Accumulated Depreciation 7,403      
Net Carrying Amount $ 48,252      
Tampa | Real Estate Held for Investment | Industrial Property        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 0      
Land 4,278      
Buildings and Improvements 32,138      
Costs Capitalized 2,317      
Gross Cost Basis at December 31, 2018        
Land 4,278      
Buildings and Improvements 34,455      
Total 38,733      
Accumulated Depreciation 5,505      
Net Carrying Amount $ 33,228      
CONNECTICUT | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 25,056      
Land 3,454      
Buildings and Improvements 30,231      
Costs Capitalized 1,498      
Gross Cost Basis at December 31, 2018        
Land 3,454      
Buildings and Improvements 31,729      
Total 35,183      
Accumulated Depreciation 2,356      
Net Carrying Amount $ 32,827      
CONNECTICUT | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 53,877      
Land 6,735      
Buildings and Improvements 67,148      
Costs Capitalized 1,696      
Gross Cost Basis at December 31, 2018        
Land 6,735      
Buildings and Improvements 68,844      
Total 75,579      
Accumulated Depreciation 5,013      
Net Carrying Amount $ 70,566      
MAINE | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 13,346      
Land 1,572      
Buildings and Improvements 15,610      
Costs Capitalized 1,735      
Gross Cost Basis at December 31, 2018        
Land 1,572      
Buildings and Improvements 17,345      
Total 18,917      
Accumulated Depreciation 1,426      
Net Carrying Amount $ 17,491      
NEW HAMPSHIRE | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 48,084      
Land 7,167      
Buildings and Improvements 59,440      
Costs Capitalized 801      
Gross Cost Basis at December 31, 2018        
Land 7,167      
Buildings and Improvements 60,241      
Total 67,408      
Accumulated Depreciation 4,437      
Net Carrying Amount $ 62,971      
NEW HAMPSHIRE | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 41,159      
Land 6,092      
Buildings and Improvements 50,557      
Costs Capitalized 854      
Gross Cost Basis at December 31, 2018        
Land 6,092      
Buildings and Improvements 51,411      
Total 57,503      
Accumulated Depreciation 3,601      
Net Carrying Amount $ 53,902      
NEW JERSEY | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 7      
Initial Cost        
Encumbrances $ 123,033      
Land 20,639      
Buildings and Improvements 145,058      
Costs Capitalized 8,689      
Gross Cost Basis at December 31, 2018        
Land 20,639      
Buildings and Improvements 153,747      
Total 174,386      
Accumulated Depreciation 13,119      
Net Carrying Amount $ 161,267      
NEW JERSEY | Real Estate Held for Investment | Hotel Full Service        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 39,893      
Land 16,282      
Buildings and Improvements 35,308      
Costs Capitalized 3,786      
Gross Cost Basis at December 31, 2018        
Land 16,282      
Buildings and Improvements 39,094      
Total 55,376      
Accumulated Depreciation 3,118      
Net Carrying Amount $ 52,258      
NEW JERSEY | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 93,153      
Land 18,073      
Buildings and Improvements 110,251      
Costs Capitalized 2,182      
Gross Cost Basis at December 31, 2018        
Land 18,073      
Buildings and Improvements 112,433      
Total 130,506      
Accumulated Depreciation 8,484      
Net Carrying Amount $ 122,022      
NEW JERSEY | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 15,776      
Land 3,572      
Buildings and Improvements 13,553      
Costs Capitalized 2,154      
Gross Cost Basis at December 31, 2018        
Land 3,572      
Buildings and Improvements 15,707      
Total 19,279      
Accumulated Depreciation 1,514      
Net Carrying Amount $ 17,765      
NEW YORK | Real Estate Held for Investment | Hotel Extended Stay        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 39,657      
Land 4,108      
Buildings and Improvements 48,124      
Costs Capitalized 3,584      
Gross Cost Basis at December 31, 2018        
Land 4,108      
Buildings and Improvements 51,708      
Total 55,816      
Accumulated Depreciation 3,606      
Net Carrying Amount $ 52,210      
NEW YORK | Real Estate Held for Investment | Hotel Select Services        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 5      
Initial Cost        
Encumbrances $ 102,426      
Land 30,292      
Buildings and Improvements 107,812      
Costs Capitalized 5,838      
Gross Cost Basis at December 31, 2018        
Land 30,292      
Buildings and Improvements 113,650      
Total 143,942      
Accumulated Depreciation 9,803      
Net Carrying Amount $ 134,139      
NEW YORK | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 8      
Initial Cost        
Encumbrances $ 28,962      
Land 3,791      
Buildings and Improvements 25,267      
Costs Capitalized 6,863      
Gross Cost Basis at December 31, 2018        
Land 3,791      
Buildings and Improvements 32,130      
Total 35,921      
Accumulated Depreciation 2,991      
Net Carrying Amount $ 32,930      
IOWA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 3      
Initial Cost        
Encumbrances $ 17,346      
Land 0      
Buildings and Improvements 15,832      
Costs Capitalized 71      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 15,903      
Total 15,903      
Accumulated Depreciation 1,066      
Net Carrying Amount $ 14,837      
NEVADA | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 84,687      
Land 27,160      
Buildings and Improvements 71,823      
Costs Capitalized 2,951      
Gross Cost Basis at December 31, 2018        
Land 27,160      
Buildings and Improvements 74,774      
Total 101,934      
Accumulated Depreciation 5,211      
Net Carrying Amount $ 96,723      
RHODE ISLAND | Real Estate Held for Investment | Hotel - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 6,750      
Land 910      
Buildings and Improvements 7,017      
Costs Capitalized 972      
Gross Cost Basis at December 31, 2018        
Land 910      
Buildings and Improvements 7,989      
Total 8,899      
Accumulated Depreciation 728      
Net Carrying Amount $ 8,171      
FRANCE | Real Estate Held for Investment | Industrial - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 4      
Initial Cost        
Encumbrances $ 37,075      
Land 13,034      
Buildings and Improvements 36,185      
Costs Capitalized 604      
Gross Cost Basis at December 31, 2018        
Land 13,034      
Buildings and Improvements 36,789      
Total 49,823      
Accumulated Depreciation 1,960      
Net Carrying Amount $ 47,863      
FRANCE | Real Estate Held for Investment | Office - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 33      
Initial Cost        
Encumbrances $ 142,126      
Land 60,301      
Buildings and Improvements 139,169      
Costs Capitalized 15,448      
Gross Cost Basis at December 31, 2018        
Land 60,301      
Buildings and Improvements 154,617      
Total 214,918      
Accumulated Depreciation 7,573      
Net Carrying Amount $ 207,345      
FRANCE | Real Estate Held for Investment | Office/Industrial - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 206      
Initial Cost        
Encumbrances $ 346,727      
Land 109,406      
Buildings and Improvements 329,735      
Costs Capitalized 663      
Gross Cost Basis at December 31, 2018        
Land 109,406      
Buildings and Improvements 330,398      
Total 439,804      
Accumulated Depreciation 1,798      
Net Carrying Amount $ 438,006      
FRANCE | Real Estate Held for Investment | Retail - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 11,349      
Land 4,876      
Buildings and Improvements 8,871      
Costs Capitalized 62      
Gross Cost Basis at December 31, 2018        
Land 4,876      
Buildings and Improvements 8,933      
Total 13,809      
Accumulated Depreciation 427      
Net Carrying Amount $ 13,382      
SPAIN | Real Estate Held for Investment | Industrial - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 0      
Land 0      
Buildings and Improvements 2,346      
Costs Capitalized 9      
Gross Cost Basis at December 31, 2018        
Land 0      
Buildings and Improvements 2,355      
Total 2,355      
Accumulated Depreciation 146      
Net Carrying Amount $ 2,209      
SPAIN | Real Estate Held for Investment | Office - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 2      
Initial Cost        
Encumbrances $ 12,931      
Land 96,002      
Buildings and Improvements 88,770      
Costs Capitalized 168      
Gross Cost Basis at December 31, 2018        
Land 96,002      
Buildings and Improvements 88,938      
Total 184,940      
Accumulated Depreciation 4,731      
Net Carrying Amount $ 180,209      
ITALY | Real Estate Held for Investment | Mixed - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 10,467      
Land 13,293      
Buildings and Improvements 18,972      
Costs Capitalized 4,232      
Gross Cost Basis at December 31, 2018        
Land 13,293      
Buildings and Improvements 23,204      
Total 36,497      
Accumulated Depreciation 1,521      
Net Carrying Amount $ 34,976      
United States | Real Estate Held for Investment | Multifamily - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 1      
Initial Cost        
Encumbrances $ 0      
Land 1,659      
Buildings and Improvements 269      
Costs Capitalized 14,156      
Gross Cost Basis at December 31, 2018        
Land 1,659      
Buildings and Improvements 14,425      
Total 16,084      
Accumulated Depreciation 392      
Net Carrying Amount $ 15,692      
United States | Real Estate Held for Investment | Office - Other Equity and Debt        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Number of Properties | property 6      
Initial Cost        
Encumbrances $ 73,015      
Land 24,510      
Buildings and Improvements 198,612      
Costs Capitalized 11,508      
Gross Cost Basis at December 31, 2018        
Land 24,510      
Buildings and Improvements 210,120      
Total 234,630      
Accumulated Depreciation 28,039      
Net Carrying Amount 206,591      
United States | Disposal Group, Held-for-sale, Not Discontinued Operations | Hotel, Mixed, Industrial, Leisure, Multifamily, Office, Retail And Residential - Other Equity and Debt        
Gross Cost Basis at December 31, 2018        
Net Carrying Amount 180,029      
Europe | Disposal Group, Held-for-sale, Not Discontinued Operations | Hotel, Mixed, Industrial, Leisure, Multifamily, Office, Retail And Residential - Other Equity and Debt        
Gross Cost Basis at December 31, 2018        
Net Carrying Amount $ 471,274