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ACQUISITIONS, DEVELOPMENT PROJECTS PLACED IN SERVICE AND DISPOSITIONS - Property Dispositions (Details)
$ in Thousands
 2 Months Ended 3 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
ft²
unit
Oct. 31, 2018
USD ($)
Jul. 31, 2018
USD ($)
Apr. 30, 2018
USD ($)
ft²
unit
apartment_community
Jan. 31, 2018
USD ($)
Oct. 31, 2017
USD ($)
Jul. 31, 2017
USD ($)
Apr. 30, 2017
USD ($)
ft²
property
Jan. 31, 2017
USD ($)
Oct. 31, 2016
USD ($)
Jul. 31, 2016
USD ($)
Dec. 31, 2018
USD ($)
ft²
property
unit
Dec. 31, 2017
USD ($)
Apr. 30, 2018
USD ($)
ft²
property
unit
apartment_community
Apr. 30, 2017
USD ($)
ft²
property
Apr. 30, 2016
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price $ 30,287 $ 45,638 $ 45,946 $ 44,185 $ 42,716 $ 41,866 $ 40,978 $ 42,811 $ 39,797 $ 39,195 $ 38,301 $ 121,871 $ 111,249 $ 169,745 $ 160,104 $ 145,500
Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       63,357   515,130 286,926  
Gain/(Loss)                       $ 9,707   184,268 74,949  
Retail Site | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                       5        
Multi-Family Residential | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                       3        
Sales price                       $ 41,500   18,913    
Gain/(Loss)                       8,453   3,343    
Multi-Family Residential | Disposed of by Sale | Dakota Commons Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       4,420        
Gain/(Loss)                       $ 542        
Number of apartment units, dispositions | unit 44                     44        
Multi-Family Residential | Disposed of by Sale | Williston Garden Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 12,310        
Gain/(Loss)                       $ 997        
Number of apartment units, dispositions | unit 145                     145        
Interest in joint venture 74.11%                     74.11%        
Multi-Family Residential | Disposed of by Sale | Renaissance Heights Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 24,770        
Gain/(Loss)                       $ 6,914        
Number of apartment units, dispositions | unit 288                     288        
Interest in joint venture 87.14%                     87.14%        
Multi-Family Residential | Disposed of by Sale | Multifamily 327 Unit Minot Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           12,263    
Gain/(Loss)                           $ 701    
Number of apartment units, dispositions | unit       327                   327    
Number of apartment communities | apartment_community       13                   13    
Multi-Family Residential | Disposed of by Sale | Crown - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 5,700    
Gain/(Loss)                           $ 2,382    
Number of apartment units, dispositions | unit       48                   48    
Multi-Family Residential | Disposed of by Sale | Northern Valley - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 950    
Gain/(Loss)                           $ 260    
Number of apartment units, dispositions | unit       16                   16    
Multi-Family Residential | Disposed of by Sale | Pinecone Villas Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             3,540  
Gain/(Loss)                             $ 808  
Number of apartment units, dispositions | property               24             24  
Other | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 16,707   $ 493,042 $ 17,400  
Gain/(Loss)                       1,302   180,938 11,419  
Other | Disposed of by Sale | Minot Southgate Retail - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       1,925   3,440    
Gain/(Loss)                       $ (131)   $ 108    
Area of real estate property | ft² 7,849     4,998               7,849   4,998    
Other | Disposed of by Sale | Fresenius - Duluth, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 1,900        
Gain/(Loss)                       $ 822        
Area of real estate property | ft² 9,052                     9,052        
Other | Disposed of by Sale | Minot 2505 16th Street SW - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 1,710        
Gain/(Loss)                       $ (104)        
Area of real estate property | ft² 15,000                     15,000        
Other | Disposed of by Sale | 81594 Sq Ft Minot Arrowhead - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 6,622        
Gain/(Loss)                       $ 715        
Area of real estate property | ft² 81,594                     81,594        
Other | Disposed of by Sale | Bloomington 2000 W 94th Street - Bloomington, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 4,550        
Gain/(Loss)                       $ 0        
Area of real estate property | ft² 100,850                     100,850        
Other | Disposed of by Sale | Lexington Commerce Center Eagan Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 9,000    
Gain/(Loss)                           $ 5,037    
Area of real estate property | ft²       90,260                   90,260    
Other | Disposed of by Sale | Eagan 1440 Duckwood Medical - Eagan, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 2,100    
Gain/(Loss)                           $ 214    
Area of real estate property | ft²       17,640                   17,640    
Other | Disposed of by Sale | Edgewood Vista Hermantown Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 36,884    
Gain/(Loss)                           $ 12,187    
Area of real estate property | ft²       279,834                   279,834    
Other | Disposed of by Sale | Urbandale - Urbandale IA                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 16,700    
Gain/(Loss)                           $ 3,843    
Area of real estate property | ft²       518,161                   518,161    
Other | Disposed of by Sale | Long Lake Road - Roseville MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 18,650    
Gain/(Loss)                           $ 5,884    
Area of real estate property | ft²       36,053                   36,053    
Other | Disposed of by Sale | Healthcare Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                           25    
Sales price                           $ 370,268    
Gain/(Loss)                           $ 137,490    
Area of real estate property | ft²       1,205,432                   1,205,432    
Other | Disposed of by Sale | Garden View - St. Paul MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 14,000    
Gain/(Loss)                           $ 7,809    
Area of real estate property | ft²       43,404                   43,404    
Other | Disposed of by Sale | Ritchie Medical - St. Paul MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 16,500    
Gain/(Loss)                           $ 6,081    
Area of real estate property | ft²       52,116                   52,116    
Other | Disposed of by Sale | Bismarck 715 East Broadway - Bismarck, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 5,500    
Gain/(Loss)                           $ 2,285    
Area of real estate property | ft²       22,187                   22,187    
Other | Disposed of by Sale | Stone Container Fargo Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             13,400  
Gain/(Loss)                             $ 8,982  
Area of real estate property | ft²               195,075             195,075  
Other | Disposed of by Sale | Grand Forks Carmike Grand Forks Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             $ 4,000  
Gain/(Loss)                             $ 2,437  
Area of real estate property | ft²               28,528             28,528  
Unimproved Land | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                       3        
Sales price                       $ 5,150        
Gain/(Loss)                       (48)        
Unimproved Land | Disposed of by Sale | Grand Forks Grand Forks Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       3,000        
Gain/(Loss)                       14        
Unimproved Land | Disposed of by Sale | Renaissance Heights Unimproved                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       750        
Gain/(Loss)                       $ 66        
Interest in joint venture 70.00%                     70.00%        
Unimproved Land | Disposed of by Sale | Badger Hills - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                       $ 1,400        
Gain/(Loss)                       (128)        
Unimproved Land | Disposed of by Sale | Bismarck 4916 - Bismarck, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                           $ 3,175    
Gain/(Loss)                           (13)    
Unimproved Land | Disposed of by Sale | Grand Chute, Wisconsin, Unimproved Land                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             $ 250  
Gain/(Loss)                             (24)  
Healthcare | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             265,736  
Gain/(Loss)                             $ 62,746  
Healthcare | Disposed of by Sale | Idaho Spring Creek Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                             9  
Sales price                             $ 43,900  
Gain/(Loss)                             $ 6,503  
Area of real estate property | ft²               189,244             189,244  
Healthcare | Disposed of by Sale | Five Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                             5  
Sales price                             $ 69,928  
Gain/(Loss)                             $ 19,535  
Area of real estate property | ft²               426,652             426,652  
Healthcare | Disposed of by Sale | Wyoming Senior Housing Portfolio                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                             5  
Sales price                             $ 49,600  
Gain/(Loss)                             $ 4,131  
Area of real estate property | ft²               286,854             286,854  
Healthcare | Disposed of by Sale | Nine Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                             9  
Sales price                             $ 30,700  
Gain/(Loss)                             $ 6,619  
Area of real estate property | ft²               169,001             169,001  
Healthcare | Disposed of by Sale | Four Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Number of properties sold | property                             4  
Sales price                             $ 35,348  
Gain/(Loss)                             $ 20,837  
Area of real estate property | ft²               169,562             169,562  
Healthcare | Disposed of by Sale | Healtheast St John And Woodwinds Maplewood And Woodbury Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             $ 20,700  
Gain/(Loss)                             $ 6,923  
Area of real estate property | ft²               114,316             114,316  
Healthcare | Disposed of by Sale | Sartell 2000 23 Rd Street South Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             $ 5,600  
Gain/(Loss)                             $ (323)  
Area of real estate property | ft²               59,760             59,760  
Healthcare | Disposed of by Sale | Legends At Heritage Place Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Sales price                             $ 9,960  
Gain/(Loss)                             $ (1,479)  
Area of real estate property | ft²               98,174             98,174  
Real Estate                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       50,719   73,034 $ 64,326 $ 58,148
Real Estate | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       53,650   330,862 211,977  
Real Estate | Multi-Family Residential | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       33,047   15,570    
Real Estate | Multi-Family Residential | Disposed of by Sale | Dakota Commons Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       3,878        
Real Estate | Multi-Family Residential | Disposed of by Sale | Williston Garden Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       11,313        
Real Estate | Multi-Family Residential | Disposed of by Sale | Renaissance Heights Williston Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       17,856        
Real Estate | Multi-Family Residential | Disposed of by Sale | Multifamily 327 Unit Minot Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           11,562    
Real Estate | Multi-Family Residential | Disposed of by Sale | Crown - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           3,318    
Real Estate | Multi-Family Residential | Disposed of by Sale | Northern Valley - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           690    
Real Estate | Multi-Family Residential | Disposed of by Sale | Pinecone Villas Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             2,732  
Real Estate | Other | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       15,405   312,104 5,981  
Real Estate | Other | Disposed of by Sale | Minot Southgate Retail - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       2,056   3,332    
Real Estate | Other | Disposed of by Sale | Fresenius - Duluth, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       1,078        
Real Estate | Other | Disposed of by Sale | Minot 2505 16th Street SW - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       1,814        
Real Estate | Other | Disposed of by Sale | 81594 Sq Ft Minot Arrowhead - Minot, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       5,907        
Real Estate | Other | Disposed of by Sale | Bloomington 2000 W 94th Street - Bloomington, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       4,550        
Real Estate | Other | Disposed of by Sale | Lexington Commerce Center Eagan Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           3,963    
Real Estate | Other | Disposed of by Sale | Eagan 1440 Duckwood Medical - Eagan, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           1,886    
Real Estate | Other | Disposed of by Sale | Edgewood Vista Hermantown Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           24,697    
Real Estate | Other | Disposed of by Sale | Urbandale - Urbandale IA                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           12,857    
Real Estate | Other | Disposed of by Sale | Long Lake Road - Roseville MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           12,766    
Real Estate | Other | Disposed of by Sale | Healthcare Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           232,778    
Real Estate | Other | Disposed of by Sale | Garden View - St. Paul MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           6,191    
Real Estate | Other | Disposed of by Sale | Ritchie Medical - St. Paul MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           10,419    
Real Estate | Other | Disposed of by Sale | Bismarck 715 East Broadway - Bismarck, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           3,215    
Real Estate | Other | Disposed of by Sale | Stone Container Fargo Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             4,418  
Real Estate | Other | Disposed of by Sale | Grand Forks Carmike Grand Forks Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             1,563  
Real Estate | Unimproved Land | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       5,198        
Real Estate | Unimproved Land | Disposed of by Sale | Grand Forks Grand Forks Nd                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       2,986        
Real Estate | Unimproved Land | Disposed of by Sale | Renaissance Heights Unimproved                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       684        
Real Estate | Unimproved Land | Disposed of by Sale | Badger Hills - Rochester, MN                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                       $ 1,528        
Real Estate | Unimproved Land | Disposed of by Sale | Bismarck 4916 - Bismarck, ND                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                           $ 3,188    
Real Estate | Unimproved Land | Disposed of by Sale | Grand Chute, Wisconsin, Unimproved Land                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             274  
Real Estate | Healthcare | Disposed of by Sale                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             202,990  
Real Estate | Healthcare | Disposed of by Sale | Idaho Spring Creek Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             37,397  
Real Estate | Healthcare | Disposed of by Sale | Five Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             50,393  
Real Estate | Healthcare | Disposed of by Sale | Wyoming Senior Housing Portfolio                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             45,469  
Real Estate | Healthcare | Disposed of by Sale | Nine Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             24,081  
Real Estate | Healthcare | Disposed of by Sale | Four Edgewood Vista Senior Housing Properties                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             14,511  
Real Estate | Healthcare | Disposed of by Sale | Healtheast St John And Woodwinds Maplewood And Woodbury Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             13,777  
Real Estate | Healthcare | Disposed of by Sale | Sartell 2000 23 Rd Street South Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             5,923  
Real Estate | Healthcare | Disposed of by Sale | Legends At Heritage Place Sartell Mn                                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                
Property management expense                             $ 11,439