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SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2024
USD ($)
apartment
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Real Estate and Accumulated Depreciation [Line Items]      
Encumbrance $ 978,883    
Initial cost      
Land 3,191,863    
Buildings and improvements 11,470,214    
Costs capitalized subsequent to acquisition 2,927,441    
Gross amount carried at close of period      
Land and improvements 3,246,789    
Buildings and improvements 14,342,729    
Total 17,589,518    
Accumulated depreciation (6,150,618) $ (5,664,931) $ (5,152,133)
Aggregate cost for federal income tax purpose 13,600,000    
Rental properties:      
Acquisition, development, and improvement of real estate 1,614,570 235,423 427,668
Disposition of real estate and other (160,275) (66,427) (91,368)
Balance at the end of year 17,589,518    
Accumulated depreciation:      
Balance at beginning of year 5,664,931 5,152,133 4,646,854
Depreciation expense 571,813 545,702 536,202
Accumulated depreciation - Disposals and other (86,126) (32,904) (30,923)
Balance at the end of year $ 6,150,618 5,664,931 5,152,133
Encumbered Apartment Communities      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 4,741    
Encumbrance $ 978,883    
Initial cost      
Land 333,872    
Buildings and improvements 1,278,355    
Costs capitalized subsequent to acquisition 206,589    
Gross amount carried at close of period      
Land and improvements 337,193    
Buildings and improvements 1,481,623    
Total 1,818,816    
Accumulated depreciation (522,147)    
Rental properties:      
Balance at the end of year 1,818,816    
Accumulated depreciation:      
Balance at the end of year $ 522,147    
Encumbered Apartment Communities | Belmont Station      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 275    
Encumbrance $ 29,312    
Initial cost      
Land 8,100    
Buildings and improvements 66,666    
Costs capitalized subsequent to acquisition 11,218    
Gross amount carried at close of period      
Land and improvements 8,267    
Buildings and improvements 77,717    
Total 85,984    
Accumulated depreciation $ (45,182)    
Date of construction 2009    
Date acquired Mar-09    
Rental properties:      
Balance at the end of year $ 85,984    
Accumulated depreciation:      
Balance at the end of year $ 45,182    
Encumbered Apartment Communities | Belmont Station | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Belmont Station | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Bridgeport      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 184    
Encumbrance $ 29,600    
Initial cost      
Land 11,825    
Buildings and improvements 52,268    
Costs capitalized subsequent to acquisition 95    
Gross amount carried at close of period      
Land and improvements 11,825    
Buildings and improvements 52,363    
Total 64,188    
Accumulated depreciation $ (382)    
Date of construction 1987    
Date acquired Oct-24    
Rental properties:      
Balance at the end of year $ 64,188    
Accumulated depreciation:      
Balance at the end of year $ 382    
Encumbered Apartment Communities | Bridgeport | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Bridgeport | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Brio      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 300    
Encumbrance $ 87,983    
Initial cost      
Land 16,885    
Buildings and improvements 151,741    
Costs capitalized subsequent to acquisition 5,350    
Gross amount carried at close of period      
Land and improvements 16,885    
Buildings and improvements 157,091    
Total 173,976    
Accumulated depreciation $ (32,715)    
Date of construction 2015    
Date acquired Jun-19    
Rental properties:      
Balance at the end of year $ 173,976    
Accumulated depreciation:      
Balance at the end of year $ 32,715    
Encumbered Apartment Communities | Brio | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Brio | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Fountain Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 705    
Encumbrance $ 82,956    
Initial cost      
Land 25,073    
Buildings and improvements 94,980    
Costs capitalized subsequent to acquisition 49,004    
Gross amount carried at close of period      
Land and improvements 25,203    
Buildings and improvements 143,854    
Total 169,057    
Accumulated depreciation $ (103,524)    
Date of construction 2002    
Date acquired Feb-04    
Rental properties:      
Balance at the end of year $ 169,057    
Accumulated depreciation:      
Balance at the end of year $ 103,524    
Encumbered Apartment Communities | Fountain Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Fountain Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Highridge      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 255    
Encumbrance $ 69,487    
Initial cost      
Land 5,419    
Buildings and improvements 18,347    
Costs capitalized subsequent to acquisition 40,501    
Gross amount carried at close of period      
Land and improvements 6,073    
Buildings and improvements 58,194    
Total 64,267    
Accumulated depreciation $ (49,226)    
Date of construction 1972    
Date acquired May-97    
Rental properties:      
Balance at the end of year $ 64,267    
Accumulated depreciation:      
Balance at the end of year $ 49,226    
Encumbered Apartment Communities | Highridge | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Highridge | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Hillsborough Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 235    
Encumbrance $ 41,300    
Initial cost      
Land 13,381    
Buildings and improvements 85,332    
Costs capitalized subsequent to acquisition 123    
Gross amount carried at close of period      
Land and improvements 13,381    
Buildings and improvements 85,455    
Total 98,836    
Accumulated depreciation $ (616)    
Date of construction 1999    
Date acquired Oct-24    
Rental properties:      
Balance at the end of year $ 98,836    
Accumulated depreciation:      
Balance at the end of year $ 616    
Encumbered Apartment Communities | Hillsborough Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Hillsborough Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Lawrence Station      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 336    
Encumbrance $ 76,886    
Initial cost      
Land 45,532    
Buildings and improvements 106,735    
Costs capitalized subsequent to acquisition 8,038    
Gross amount carried at close of period      
Land and improvements 45,532    
Buildings and improvements 114,773    
Total 160,305    
Accumulated depreciation $ (46,829)    
Date of construction 2012    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 160,305    
Accumulated depreciation:      
Balance at the end of year $ 46,829    
Encumbered Apartment Communities | Lawrence Station | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Encumbered Apartment Communities | Lawrence Station | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Magnolia Square/Magnolia Lane      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 188    
Encumbrance $ 52,433    
Initial cost      
Land 8,190    
Buildings and improvements 24,736    
Costs capitalized subsequent to acquisition 19,883    
Gross amount carried at close of period      
Land and improvements 8,191    
Buildings and improvements 44,618    
Total 52,809    
Accumulated depreciation $ (32,664)    
Date of construction 1963    
Date acquired Sep-07    
Rental properties:      
Balance at the end of year $ 52,809    
Accumulated depreciation:      
Balance at the end of year $ 32,664    
Encumbered Apartment Communities | Magnolia Square/Magnolia Lane | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Magnolia Square/Magnolia Lane | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Marquis      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 166    
Encumbrance $ 45,297    
Initial cost      
Land 20,495    
Buildings and improvements 47,823    
Costs capitalized subsequent to acquisition 3,049    
Gross amount carried at close of period      
Land and improvements 20,495    
Buildings and improvements 50,872    
Total 71,367    
Accumulated depreciation $ (10,558)    
Date of construction 2015    
Date acquired Dec-18    
Rental properties:      
Balance at the end of year $ 71,367    
Accumulated depreciation:      
Balance at the end of year $ 10,558    
Encumbered Apartment Communities | Marquis | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Marquis | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Paragon      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 301    
Encumbrance $ 59,200    
Initial cost      
Land 32,230    
Buildings and improvements 77,320    
Costs capitalized subsequent to acquisition 5,375    
Gross amount carried at close of period      
Land and improvements 32,230    
Buildings and improvements 82,695    
Total 114,925    
Accumulated depreciation $ (30,090)    
Date of construction 2013    
Date acquired Jul-14    
Rental properties:      
Balance at the end of year $ 114,925    
Accumulated depreciation:      
Balance at the end of year $ 30,090    
Encumbered Apartment Communities | Paragon | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Paragon | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Sage at Cupertino      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 230    
Encumbrance $ 51,886    
Initial cost      
Land 35,719    
Buildings and improvements 53,449    
Costs capitalized subsequent to acquisition 15,668    
Gross amount carried at close of period      
Land and improvements 35,719    
Buildings and improvements 69,117    
Total 104,836    
Accumulated depreciation $ (23,624)    
Date of construction 1971    
Date acquired Mar-17    
Rental properties:      
Balance at the end of year $ 104,836    
Accumulated depreciation:      
Balance at the end of year $ 23,624    
Encumbered Apartment Communities | Sage at Cupertino | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Sage at Cupertino | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Barkley      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 161    
Encumbrance $ 14,941    
Initial cost      
Land 0    
Buildings and improvements 8,520    
Costs capitalized subsequent to acquisition 9,639    
Gross amount carried at close of period      
Land and improvements 2,353    
Buildings and improvements 15,806    
Total 18,159    
Accumulated depreciation $ (13,716)    
Date of construction 1984    
Date acquired Apr-00    
Rental properties:      
Balance at the end of year $ 18,159    
Accumulated depreciation:      
Balance at the end of year $ 13,716    
Encumbered Apartment Communities | The Barkley | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Barkley | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Carlyle      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 132    
Encumbrance $ 24,100    
Initial cost      
Land 6,344    
Buildings and improvements 48,086    
Costs capitalized subsequent to acquisition 202    
Gross amount carried at close of period      
Land and improvements 6,344    
Buildings and improvements 48,288    
Total 54,632    
Accumulated depreciation $ (351)    
Date of construction 2000    
Date acquired Oct-24    
Rental properties:      
Balance at the end of year $ 54,632    
Accumulated depreciation:      
Balance at the end of year $ 351    
Encumbered Apartment Communities | The Carlyle | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Carlyle | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Commons      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 264    
Encumbrance $ 57,734    
Initial cost      
Land 12,555    
Buildings and improvements 29,307    
Costs capitalized subsequent to acquisition 13,505    
Gross amount carried at close of period      
Land and improvements 12,556    
Buildings and improvements 42,811    
Total 55,367    
Accumulated depreciation $ (24,527)    
Date of construction 1973    
Date acquired Jul-10    
Rental properties:      
Balance at the end of year $ 55,367    
Accumulated depreciation:      
Balance at the end of year $ 24,527    
Encumbered Apartment Communities | The Commons | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Commons | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Dylan      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 184    
Encumbrance $ 56,815    
Initial cost      
Land 19,984    
Buildings and improvements 82,286    
Costs capitalized subsequent to acquisition 5,478    
Gross amount carried at close of period      
Land and improvements 19,990    
Buildings and improvements 87,758    
Total 107,748    
Accumulated depreciation $ (30,333)    
Date of construction 2015    
Date acquired Mar-15    
Rental properties:      
Balance at the end of year $ 107,748    
Accumulated depreciation:      
Balance at the end of year $ 30,333    
Encumbered Apartment Communities | The Dylan | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Dylan | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Galloway      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 506    
Encumbrance $ 102,890    
Initial cost      
Land 32,966    
Buildings and improvements 184,499    
Costs capitalized subsequent to acquisition 9,159    
Gross amount carried at close of period      
Land and improvements 32,966    
Buildings and improvements 193,658    
Total 226,624    
Accumulated depreciation $ (35,244)    
Date of construction 2016    
Date acquired Jan-20    
Rental properties:      
Balance at the end of year $ 226,624    
Accumulated depreciation:      
Balance at the end of year $ 35,244    
Encumbered Apartment Communities | The Galloway | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Galloway | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | The Huxley      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 187    
Encumbrance $ 51,710    
Initial cost      
Land 19,362    
Buildings and improvements 75,641    
Costs capitalized subsequent to acquisition 7,448    
Gross amount carried at close of period      
Land and improvements 19,371    
Buildings and improvements 83,080    
Total 102,451    
Accumulated depreciation $ (28,514)    
Date of construction 2014    
Date acquired Mar-15    
Rental properties:      
Balance at the end of year $ 102,451    
Accumulated depreciation:      
Balance at the end of year $ 28,514    
Encumbered Apartment Communities | The Huxley | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | The Huxley | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Township      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 132    
Encumbrance $ 44,353    
Initial cost      
Land 19,812    
Buildings and improvements 70,619    
Costs capitalized subsequent to acquisition 2,854    
Gross amount carried at close of period      
Land and improvements 19,812    
Buildings and improvements 73,473    
Total 93,285    
Accumulated depreciation $ (14,052)    
Date of construction 2014    
Date acquired Sep-19    
Rental properties:      
Balance at the end of year $ 93,285    
Accumulated depreciation:      
Balance at the end of year $ 14,052    
Encumbered Apartment Communities | Township | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Township | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Brookside Oaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Brookside Oaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | City View | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | City View | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Domaine | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Domaine | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Fairhaven | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Fairhaven | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Form 15 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Form 15 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Foster’s Landing | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Encumbered Apartment Communities | Foster’s Landing | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Montanosa | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Encumbered Apartment Communities | Montanosa | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Montebello | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Montebello | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Montejo | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Montejo | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | 1000 Kiely | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | 1000 Kiely | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Valley Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Valley Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Encumbered Apartment Communities | Villa Angelina | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Encumbered Apartment Communities | Villa Angelina | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 49,722    
Initial cost      
Land $ 2,777,285    
Buildings and improvements 10,175,272    
Costs capitalized subsequent to acquisition 2,704,152    
Gross amount carried at close of period      
Land and improvements 2,827,529    
Buildings and improvements 12,829,180    
Total 15,656,709    
Accumulated depreciation (5,605,177)    
Rental properties:      
Balance at the end of year 15,656,709    
Accumulated depreciation:      
Balance at the end of year $ 5,605,177    
Unencumbered Apartment Communities | Agora      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 49    
Initial cost      
Land $ 4,932    
Buildings and improvements 60,423    
Costs capitalized subsequent to acquisition 2,551    
Gross amount carried at close of period      
Land and improvements 4,934    
Buildings and improvements 62,972    
Total 67,906    
Accumulated depreciation $ (10,873)    
Date of construction 2016    
Date acquired Jan-20    
Rental properties:      
Balance at the end of year $ 67,906    
Accumulated depreciation:      
Balance at the end of year $ 10,873    
Unencumbered Apartment Communities | Agora | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Agora | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Alessio      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 624    
Initial cost      
Land $ 32,136    
Buildings and improvements 128,543    
Costs capitalized subsequent to acquisition 26,920    
Gross amount carried at close of period      
Land and improvements 32,136    
Buildings and improvements 155,463    
Total 187,599    
Accumulated depreciation $ (64,587)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 187,599    
Accumulated depreciation:      
Balance at the end of year $ 64,587    
Unencumbered Apartment Communities | Alessio | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Alessio | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Allegro      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 97    
Initial cost      
Land $ 5,869    
Buildings and improvements 23,977    
Costs capitalized subsequent to acquisition 4,220    
Gross amount carried at close of period      
Land and improvements 5,869    
Buildings and improvements 28,197    
Total 34,066    
Accumulated depreciation $ (15,358)    
Date of construction 2010    
Date acquired Oct-10    
Rental properties:      
Balance at the end of year $ 34,066    
Accumulated depreciation:      
Balance at the end of year $ 15,358    
Unencumbered Apartment Communities | Allegro | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Allegro | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Allure at Scripps Ranch      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 194    
Initial cost      
Land $ 11,923    
Buildings and improvements 47,690    
Costs capitalized subsequent to acquisition 6,172    
Gross amount carried at close of period      
Land and improvements 11,923    
Buildings and improvements 53,862    
Total 65,785    
Accumulated depreciation $ (20,375)    
Date of construction 2002    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 65,785    
Accumulated depreciation:      
Balance at the end of year $ 20,375    
Unencumbered Apartment Communities | Allure at Scripps Ranch | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Allure at Scripps Ranch | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Alpine Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 301    
Initial cost      
Land $ 4,967    
Buildings and improvements 19,728    
Costs capitalized subsequent to acquisition 15,720    
Gross amount carried at close of period      
Land and improvements 4,982    
Buildings and improvements 35,433    
Total 40,415    
Accumulated depreciation $ (24,897)    
Date of construction 1971    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 40,415    
Accumulated depreciation:      
Balance at the end of year $ 24,897    
Unencumbered Apartment Communities | Alpine Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Alpine Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Annaliese      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 56    
Initial cost      
Land $ 4,727    
Buildings and improvements 14,229    
Costs capitalized subsequent to acquisition 1,269    
Gross amount carried at close of period      
Land and improvements 4,726    
Buildings and improvements 15,499    
Total 20,225    
Accumulated depreciation $ (6,537)    
Date of construction 2009    
Date acquired Jan-13    
Rental properties:      
Balance at the end of year $ 20,225    
Accumulated depreciation:      
Balance at the end of year $ 6,537    
Unencumbered Apartment Communities | Annaliese | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Annaliese | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Apex      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 367    
Initial cost      
Land $ 44,240    
Buildings and improvements 103,251    
Costs capitalized subsequent to acquisition 13,675    
Gross amount carried at close of period      
Land and improvements 44,240    
Buildings and improvements 116,926    
Total 161,166    
Accumulated depreciation $ (41,819)    
Date of construction 2014    
Date acquired Aug-14    
Rental properties:      
Balance at the end of year $ 161,166    
Accumulated depreciation:      
Balance at the end of year $ 41,819    
Unencumbered Apartment Communities | Apex | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Apex | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Aqua Marina Del Rey      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 500    
Initial cost      
Land $ 58,442    
Buildings and improvements 175,326    
Costs capitalized subsequent to acquisition 28,902    
Gross amount carried at close of period      
Land and improvements 58,442    
Buildings and improvements 204,228    
Total 262,670    
Accumulated depreciation $ (83,065)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 262,670    
Accumulated depreciation:      
Balance at the end of year $ 83,065    
Unencumbered Apartment Communities | Aqua Marina Del Rey | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Aqua Marina Del Rey | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | ARLO Mountain View      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 164    
Initial cost      
Land $ 19,918    
Buildings and improvements 80,377    
Costs capitalized subsequent to acquisition 501    
Gross amount carried at close of period      
Land and improvements 19,918    
Buildings and improvements 80,878    
Total 100,796    
Accumulated depreciation $ (1,770)    
Date of construction 2018    
Date acquired May-24    
Rental properties:      
Balance at the end of year $ 100,796    
Accumulated depreciation:      
Balance at the end of year $ 1,770    
Unencumbered Apartment Communities | ARLO Mountain View | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | ARLO Mountain View | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Ascent      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 90    
Initial cost      
Land $ 3,924    
Buildings and improvements 11,862    
Costs capitalized subsequent to acquisition 3,847    
Gross amount carried at close of period      
Land and improvements 3,924    
Buildings and improvements 15,709    
Total 19,633    
Accumulated depreciation $ (7,589)    
Date of construction 1988    
Date acquired Oct-12    
Rental properties:      
Balance at the end of year $ 19,633    
Accumulated depreciation:      
Balance at the end of year $ 7,589    
Unencumbered Apartment Communities | Ascent | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Ascent | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Ashton Sherman Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 264    
Initial cost      
Land $ 23,550    
Buildings and improvements 93,811    
Costs capitalized subsequent to acquisition 4,297    
Gross amount carried at close of period      
Land and improvements 23,550    
Buildings and improvements 98,108    
Total 121,658    
Accumulated depreciation $ (27,769)    
Date of construction 2014    
Date acquired Dec-16    
Rental properties:      
Balance at the end of year $ 121,658    
Accumulated depreciation:      
Balance at the end of year $ 27,769    
Unencumbered Apartment Communities | Ashton Sherman Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Ashton Sherman Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Avant      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 443    
Initial cost      
Land $ 32,379    
Buildings and improvements 137,940    
Costs capitalized subsequent to acquisition 11,972    
Gross amount carried at close of period      
Land and improvements 32,379    
Buildings and improvements 149,912    
Total 182,291    
Accumulated depreciation $ (48,437)    
Date of construction 2014    
Date acquired Jun-15    
Rental properties:      
Balance at the end of year $ 182,291    
Accumulated depreciation:      
Balance at the end of year $ 48,437    
Unencumbered Apartment Communities | Avant | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Avant | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Avenue 64      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 224    
Initial cost      
Land $ 27,235    
Buildings and improvements 64,403    
Costs capitalized subsequent to acquisition 18,868    
Gross amount carried at close of period      
Land and improvements 27,235    
Buildings and improvements 83,271    
Total 110,506    
Accumulated depreciation $ (31,582)    
Date of construction 2007    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 110,506    
Accumulated depreciation:      
Balance at the end of year $ 31,582    
Unencumbered Apartment Communities | Avenue 64 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Avenue 64 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Aviara      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 166    
Initial cost      
Land $ 0    
Buildings and improvements 49,813    
Costs capitalized subsequent to acquisition 3,355    
Gross amount carried at close of period      
Land and improvements 0    
Buildings and improvements 53,168    
Total 53,168    
Accumulated depreciation $ (21,301)    
Date of construction 2013    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 53,168    
Accumulated depreciation:      
Balance at the end of year $ 21,301    
Unencumbered Apartment Communities | Aviara | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Aviara | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Avondale at Warner Center      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 446    
Initial cost      
Land $ 10,536    
Buildings and improvements 24,522    
Costs capitalized subsequent to acquisition 35,351    
Gross amount carried at close of period      
Land and improvements 10,601    
Buildings and improvements 59,808    
Total 70,409    
Accumulated depreciation $ (46,904)    
Date of construction 1970    
Date acquired Jan-99    
Rental properties:      
Balance at the end of year $ 70,409    
Accumulated depreciation:      
Balance at the end of year $ 46,904    
Unencumbered Apartment Communities | Avondale at Warner Center | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Avondale at Warner Center | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Beaumont      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 344    
Initial cost      
Land $ 22,101    
Buildings and improvements 113,737    
Costs capitalized subsequent to acquisition 183    
Gross amount carried at close of period      
Land and improvements 22,101    
Buildings and improvements 113,920    
Total 136,021    
Accumulated depreciation $ (166)    
Date of construction 2009    
Date acquired Nov-24    
Rental properties:      
Balance at the end of year $ 136,021    
Accumulated depreciation:      
Balance at the end of year $ 166    
Unencumbered Apartment Communities | Beaumont | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Beaumont | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bel Air      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 462    
Initial cost      
Land $ 12,105    
Buildings and improvements 18,252    
Costs capitalized subsequent to acquisition 52,007    
Gross amount carried at close of period      
Land and improvements 12,682    
Buildings and improvements 69,682    
Total 82,364    
Accumulated depreciation $ (56,969)    
Date of construction 1988    
Date acquired Jan-95    
Rental properties:      
Balance at the end of year $ 82,364    
Accumulated depreciation:      
Balance at the end of year $ 56,969    
Unencumbered Apartment Communities | Bel Air | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bel Air | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Belcarra      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 296    
Initial cost      
Land $ 21,725    
Buildings and improvements 92,091    
Costs capitalized subsequent to acquisition 8,630    
Gross amount carried at close of period      
Land and improvements 21,725    
Buildings and improvements 100,721    
Total 122,446    
Accumulated depreciation $ (37,991)    
Date of construction 2009    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 122,446    
Accumulated depreciation:      
Balance at the end of year $ 37,991    
Unencumbered Apartment Communities | Belcarra | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Belcarra | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bella Villagio      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 231    
Initial cost      
Land $ 17,247    
Buildings and improvements 40,343    
Costs capitalized subsequent to acquisition 11,052    
Gross amount carried at close of period      
Land and improvements 17,247    
Buildings and improvements 51,395    
Total 68,642    
Accumulated depreciation $ (24,776)    
Date of construction 2004    
Date acquired Sep-10    
Rental properties:      
Balance at the end of year $ 68,642    
Accumulated depreciation:      
Balance at the end of year $ 24,776    
Unencumbered Apartment Communities | Bella Villagio | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bella Villagio | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | BellCentre      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 249    
Initial cost      
Land $ 16,197    
Buildings and improvements 67,207    
Costs capitalized subsequent to acquisition 8,243    
Gross amount carried at close of period      
Land and improvements 16,197    
Buildings and improvements 75,450    
Total 91,647    
Accumulated depreciation $ (30,744)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 91,647    
Accumulated depreciation:      
Balance at the end of year $ 30,744    
Unencumbered Apartment Communities | BellCentre | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | BellCentre | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bellerive      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 63    
Initial cost      
Land $ 5,401    
Buildings and improvements 21,803    
Costs capitalized subsequent to acquisition 2,074    
Gross amount carried at close of period      
Land and improvements 5,401    
Buildings and improvements 23,877    
Total 29,278    
Accumulated depreciation $ (11,807)    
Date of construction 2011    
Date acquired Aug-11    
Rental properties:      
Balance at the end of year $ 29,278    
Accumulated depreciation:      
Balance at the end of year $ 11,807    
Unencumbered Apartment Communities | Bellerive | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bellerive | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Belmont Terrace      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 71    
Initial cost      
Land $ 4,446    
Buildings and improvements 10,290    
Costs capitalized subsequent to acquisition 8,946    
Gross amount carried at close of period      
Land and improvements 4,473    
Buildings and improvements 19,209    
Total 23,682    
Accumulated depreciation $ (13,701)    
Date of construction 1974    
Date acquired Oct-06    
Rental properties:      
Balance at the end of year $ 23,682    
Accumulated depreciation:      
Balance at the end of year $ 13,701    
Unencumbered Apartment Communities | Belmont Terrace | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Belmont Terrace | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bennett Lofts      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 178    
Initial cost      
Land $ 21,771    
Buildings and improvements 50,800    
Costs capitalized subsequent to acquisition 36,147    
Gross amount carried at close of period      
Land and improvements 28,371    
Buildings and improvements 80,347    
Total 108,718    
Accumulated depreciation $ (36,936)    
Date of construction 2004    
Date acquired Dec-12    
Rental properties:      
Balance at the end of year $ 108,718    
Accumulated depreciation:      
Balance at the end of year $ 36,936    
Unencumbered Apartment Communities | Bennett Lofts | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bennett Lofts | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bernardo Crest      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 216    
Initial cost      
Land $ 10,802    
Buildings and improvements 43,209    
Costs capitalized subsequent to acquisition 10,642    
Gross amount carried at close of period      
Land and improvements 10,802    
Buildings and improvements 53,851    
Total 64,653    
Accumulated depreciation $ (21,713)    
Date of construction 1988    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 64,653    
Accumulated depreciation:      
Balance at the end of year $ 21,713    
Unencumbered Apartment Communities | Bernardo Crest | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Bernardo Crest | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bonita Cedars      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 120    
Initial cost      
Land $ 2,496    
Buildings and improvements 9,913    
Costs capitalized subsequent to acquisition 8,239    
Gross amount carried at close of period      
Land and improvements 2,503    
Buildings and improvements 18,145    
Total 20,648    
Accumulated depreciation $ (13,147)    
Date of construction 1983    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 20,648    
Accumulated depreciation:      
Balance at the end of year $ 13,147    
Unencumbered Apartment Communities | Bonita Cedars | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bonita Cedars | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bothell Ridge      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 214    
Initial cost      
Land $ 7,440    
Buildings and improvements 48,321    
Costs capitalized subsequent to acquisition 1,211    
Gross amount carried at close of period      
Land and improvements 7,440    
Buildings and improvements 49,532    
Total 56,972    
Accumulated depreciation $ (1,420)    
Date of construction 1988    
Date acquired Mar-24    
Rental properties:      
Balance at the end of year $ 56,972    
Accumulated depreciation:      
Balance at the end of year $ 1,420    
Unencumbered Apartment Communities | Bothell Ridge | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bothell Ridge | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Boulevard      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 172    
Initial cost      
Land $ 3,520    
Buildings and improvements 8,182    
Costs capitalized subsequent to acquisition 17,696    
Gross amount carried at close of period      
Land and improvements 3,580    
Buildings and improvements 25,818    
Total 29,398    
Accumulated depreciation $ (22,499)    
Date of construction 1978    
Date acquired Jan-96    
Rental properties:      
Balance at the end of year $ 29,398    
Accumulated depreciation:      
Balance at the end of year $ 22,499    
Unencumbered Apartment Communities | Boulevard | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Boulevard | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Brookside Oaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 170    
Initial cost      
Land $ 7,301    
Buildings and improvements 16,310    
Costs capitalized subsequent to acquisition 30,143    
Gross amount carried at close of period      
Land and improvements 10,328    
Buildings and improvements 43,426    
Total 53,754    
Accumulated depreciation $ (33,191)    
Date of construction 1973    
Date acquired Jun-00    
Rental properties:      
Balance at the end of year $ 53,754    
Accumulated depreciation:      
Balance at the end of year $ 33,191    
Unencumbered Apartment Communities | Bridle Trails      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 108    
Initial cost      
Land $ 1,500    
Buildings and improvements 5,930    
Costs capitalized subsequent to acquisition 7,905    
Gross amount carried at close of period      
Land and improvements 1,531    
Buildings and improvements 13,804    
Total 15,335    
Accumulated depreciation $ (11,449)    
Date of construction 1986    
Date acquired Oct-97    
Rental properties:      
Balance at the end of year $ 15,335    
Accumulated depreciation:      
Balance at the end of year $ 11,449    
Unencumbered Apartment Communities | Bridle Trails | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bridle Trails | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Brighton Ridge      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 264    
Initial cost      
Land $ 2,623    
Buildings and improvements 10,800    
Costs capitalized subsequent to acquisition 11,607    
Gross amount carried at close of period      
Land and improvements 2,656    
Buildings and improvements 22,374    
Total 25,030    
Accumulated depreciation $ (17,721)    
Date of construction 1986    
Date acquired Dec-96    
Rental properties:      
Balance at the end of year $ 25,030    
Accumulated depreciation:      
Balance at the end of year $ 17,721    
Unencumbered Apartment Communities | Brighton Ridge | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Brighton Ridge | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Bristol Commons      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 188    
Initial cost      
Land $ 5,278    
Buildings and improvements 11,853    
Costs capitalized subsequent to acquisition 13,005    
Gross amount carried at close of period      
Land and improvements 5,293    
Buildings and improvements 24,843    
Total 30,136    
Accumulated depreciation $ (21,457)    
Date of construction 1989    
Date acquired Jan-95    
Rental properties:      
Balance at the end of year $ 30,136    
Accumulated depreciation:      
Balance at the end of year $ 21,457    
Unencumbered Apartment Communities | Bristol Commons | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Bristol Commons | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Camarillo Oaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 564    
Initial cost      
Land $ 10,953    
Buildings and improvements 25,254    
Costs capitalized subsequent to acquisition 12,642    
Gross amount carried at close of period      
Land and improvements 11,075    
Buildings and improvements 37,774    
Total 48,849    
Accumulated depreciation $ (33,205)    
Date of construction 1985    
Date acquired Jul-96    
Rental properties:      
Balance at the end of year $ 48,849    
Accumulated depreciation:      
Balance at the end of year $ 33,205    
Unencumbered Apartment Communities | Camarillo Oaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Camarillo Oaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Cambridge Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 320    
Initial cost      
Land $ 18,185    
Buildings and improvements 72,739    
Costs capitalized subsequent to acquisition 8,823    
Gross amount carried at close of period      
Land and improvements 18,185    
Buildings and improvements 81,562    
Total 99,747    
Accumulated depreciation $ (31,764)    
Date of construction 1998    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 99,747    
Accumulated depreciation:      
Balance at the end of year $ 31,764    
Unencumbered Apartment Communities | Cambridge Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Cambridge Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Camino Ruiz Square      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 160    
Initial cost      
Land $ 6,871    
Buildings and improvements 26,119    
Costs capitalized subsequent to acquisition 4,154    
Gross amount carried at close of period      
Land and improvements 6,931    
Buildings and improvements 30,213    
Total 37,144    
Accumulated depreciation $ (18,391)    
Date of construction 1990    
Date acquired Dec-06    
Rental properties:      
Balance at the end of year $ 37,144    
Accumulated depreciation:      
Balance at the end of year $ 18,391    
Unencumbered Apartment Communities | Camino Ruiz Square | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Camino Ruiz Square | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Canvas      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 123    
Initial cost      
Land $ 10,489    
Buildings and improvements 36,924    
Costs capitalized subsequent to acquisition 1,728    
Gross amount carried at close of period      
Land and improvements 10,489    
Buildings and improvements 38,652    
Total 49,141    
Accumulated depreciation $ (4,220)    
Date of construction 2014    
Date acquired Dec-21    
Rental properties:      
Balance at the end of year $ 49,141    
Accumulated depreciation:      
Balance at the end of year $ 4,220    
Unencumbered Apartment Communities | Canvas | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Canvas | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Canyon Oaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 250    
Initial cost      
Land $ 19,088    
Buildings and improvements 44,473    
Costs capitalized subsequent to acquisition 11,359    
Gross amount carried at close of period      
Land and improvements 19,088    
Buildings and improvements 55,832    
Total 74,920    
Accumulated depreciation $ (33,197)    
Date of construction 2005    
Date acquired May-07    
Rental properties:      
Balance at the end of year $ 74,920    
Accumulated depreciation:      
Balance at the end of year $ 33,197    
Unencumbered Apartment Communities | Canyon Oaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Canyon Oaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Canyon Pointe      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 250    
Initial cost      
Land $ 4,692    
Buildings and improvements 18,288    
Costs capitalized subsequent to acquisition 12,290    
Gross amount carried at close of period      
Land and improvements 4,693    
Buildings and improvements 30,577    
Total 35,270    
Accumulated depreciation $ (22,571)    
Date of construction 1990    
Date acquired Oct-03    
Rental properties:      
Balance at the end of year $ 35,270    
Accumulated depreciation:      
Balance at the end of year $ 22,571    
Unencumbered Apartment Communities | Canyon Pointe | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Canyon Pointe | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Capri at Sunny Hills      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 102    
Initial cost      
Land $ 3,337    
Buildings and improvements 13,320    
Costs capitalized subsequent to acquisition 13,258    
Gross amount carried at close of period      
Land and improvements 4,048    
Buildings and improvements 25,867    
Total 29,915    
Accumulated depreciation $ (19,266)    
Date of construction 1961    
Date acquired Sep-01    
Rental properties:      
Balance at the end of year $ 29,915    
Accumulated depreciation:      
Balance at the end of year $ 19,266    
Unencumbered Apartment Communities | Capri at Sunny Hills | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Capri at Sunny Hills | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Carmel Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 348    
Initial cost      
Land $ 26,842    
Buildings and improvements 107,368    
Costs capitalized subsequent to acquisition 12,890    
Gross amount carried at close of period      
Land and improvements 26,842    
Buildings and improvements 120,258    
Total 147,100    
Accumulated depreciation $ (48,324)    
Date of construction 2000    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 147,100    
Accumulated depreciation:      
Balance at the end of year $ 48,324    
Unencumbered Apartment Communities | Carmel Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Carmel Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Carmel Landing      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 356    
Initial cost      
Land $ 16,725    
Buildings and improvements 66,901    
Costs capitalized subsequent to acquisition 19,042    
Gross amount carried at close of period      
Land and improvements 16,725    
Buildings and improvements 85,943    
Total 102,668    
Accumulated depreciation $ (36,184)    
Date of construction 1989    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 102,668    
Accumulated depreciation:      
Balance at the end of year $ 36,184    
Unencumbered Apartment Communities | Carmel Landing | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Carmel Landing | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Carmel Summit      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 246    
Initial cost      
Land $ 14,968    
Buildings and improvements 59,871    
Costs capitalized subsequent to acquisition 11,257    
Gross amount carried at close of period      
Land and improvements 14,968    
Buildings and improvements 71,128    
Total 86,096    
Accumulated depreciation $ (27,630)    
Date of construction 1989    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 86,096    
Accumulated depreciation:      
Balance at the end of year $ 27,630    
Unencumbered Apartment Communities | Carmel Summit | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Carmel Summit | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Castle Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 216    
Initial cost      
Land $ 4,149    
Buildings and improvements 16,028    
Costs capitalized subsequent to acquisition 8,580    
Gross amount carried at close of period      
Land and improvements 4,833    
Buildings and improvements 23,924    
Total 28,757    
Accumulated depreciation $ (20,786)    
Date of construction 1998    
Date acquired Dec-98    
Rental properties:      
Balance at the end of year $ 28,757    
Accumulated depreciation:      
Balance at the end of year $ 20,786    
Unencumbered Apartment Communities | Castle Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Castle Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Catalina Gardens      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 128    
Initial cost      
Land $ 6,714    
Buildings and improvements 26,856    
Costs capitalized subsequent to acquisition 5,127    
Gross amount carried at close of period      
Land and improvements 6,714    
Buildings and improvements 31,983    
Total 38,697    
Accumulated depreciation $ (12,629)    
Date of construction 1987    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 38,697    
Accumulated depreciation:      
Balance at the end of year $ 12,629    
Unencumbered Apartment Communities | Catalina Gardens | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Catalina Gardens | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Cedar Terrace      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 180    
Initial cost      
Land $ 5,543    
Buildings and improvements 16,442    
Costs capitalized subsequent to acquisition 11,939    
Gross amount carried at close of period      
Land and improvements 5,652    
Buildings and improvements 28,272    
Total 33,924    
Accumulated depreciation $ (19,391)    
Date of construction 1984    
Date acquired Jan-05    
Rental properties:      
Balance at the end of year $ 33,924    
Accumulated depreciation:      
Balance at the end of year $ 19,391    
Unencumbered Apartment Communities | Cedar Terrace | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Cedar Terrace | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | CentrePointe      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 224    
Initial cost      
Land $ 3,405    
Buildings and improvements 7,743    
Costs capitalized subsequent to acquisition 24,676    
Gross amount carried at close of period      
Land and improvements 3,442    
Buildings and improvements 32,382    
Total 35,824    
Accumulated depreciation $ (27,577)    
Date of construction 1974    
Date acquired Jun-97    
Rental properties:      
Balance at the end of year $ 35,824    
Accumulated depreciation:      
Balance at the end of year $ 27,577    
Unencumbered Apartment Communities | CentrePointe | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | CentrePointe | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Century Towers      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 376    
Initial cost      
Land $ 14,865    
Buildings and improvements 157,787    
Costs capitalized subsequent to acquisition 745    
Gross amount carried at close of period      
Land and improvements 14,865    
Buildings and improvements 158,532    
Total 173,397    
Accumulated depreciation $ (1,600)    
Date of construction 2017    
Date acquired Sep-24    
Rental properties:      
Balance at the end of year $ 173,397    
Accumulated depreciation:      
Balance at the end of year $ 1,600    
Unencumbered Apartment Communities | Century Towers | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Century Towers | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Chestnut Street      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 96    
Initial cost      
Land $ 6,582    
Buildings and improvements 15,689    
Costs capitalized subsequent to acquisition 3,684    
Gross amount carried at close of period      
Land and improvements 6,582    
Buildings and improvements 19,373    
Total 25,955    
Accumulated depreciation $ (10,806)    
Date of construction 2002    
Date acquired Jul-08    
Rental properties:      
Balance at the end of year $ 25,955    
Accumulated depreciation:      
Balance at the end of year $ 10,806    
Unencumbered Apartment Communities | Chestnut Street | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Chestnut Street | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | City View      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 572    
Initial cost      
Land $ 9,883    
Buildings and improvements 37,670    
Costs capitalized subsequent to acquisition 43,985    
Gross amount carried at close of period      
Land and improvements 10,350    
Buildings and improvements 81,188    
Total 91,538    
Accumulated depreciation $ (67,528)    
Date of construction 1975    
Date acquired Mar-98    
Rental properties:      
Balance at the end of year $ 91,538    
Accumulated depreciation:      
Balance at the end of year $ 67,528    
Unencumbered Apartment Communities | Collins on Pine      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 76    
Initial cost      
Land $ 7,276    
Buildings and improvements 22,226    
Costs capitalized subsequent to acquisition 1,119    
Gross amount carried at close of period      
Land and improvements 7,276    
Buildings and improvements 23,345    
Total 30,621    
Accumulated depreciation $ (8,653)    
Date of construction 2013    
Date acquired May-14    
Rental properties:      
Balance at the end of year $ 30,621    
Accumulated depreciation:      
Balance at the end of year $ 8,653    
Unencumbered Apartment Communities | Collins on Pine | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Collins on Pine | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Connolly Station      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 309    
Initial cost      
Land $ 19,949    
Buildings and improvements 123,428    
Costs capitalized subsequent to acquisition 5,898    
Gross amount carried at close of period      
Land and improvements 19,949    
Buildings and improvements 129,326    
Total 149,275    
Accumulated depreciation $ (23,954)    
Date of construction 2014    
Date acquired Jan-20    
Rental properties:      
Balance at the end of year $ 149,275    
Accumulated depreciation:      
Balance at the end of year $ 23,954    
Unencumbered Apartment Communities | Connolly Station | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Connolly Station | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Corbella at Juanita Bay      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 169    
Initial cost      
Land $ 5,801    
Buildings and improvements 17,415    
Costs capitalized subsequent to acquisition 6,433    
Gross amount carried at close of period      
Land and improvements 5,801    
Buildings and improvements 23,848    
Total 29,649    
Accumulated depreciation $ (12,483)    
Date of construction 1978    
Date acquired Nov-10    
Rental properties:      
Balance at the end of year $ 29,649    
Accumulated depreciation:      
Balance at the end of year $ 12,483    
Unencumbered Apartment Communities | Corbella at Juanita Bay | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Corbella at Juanita Bay | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Cortesia      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 308    
Initial cost      
Land $ 13,912    
Buildings and improvements 55,649    
Costs capitalized subsequent to acquisition 7,266    
Gross amount carried at close of period      
Land and improvements 13,912    
Buildings and improvements 62,915    
Total 76,827    
Accumulated depreciation $ (24,416)    
Date of construction 1999    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 76,827    
Accumulated depreciation:      
Balance at the end of year $ 24,416    
Unencumbered Apartment Communities | Cortesia | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Cortesia | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Country Villas      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 180    
Initial cost      
Land $ 4,174    
Buildings and improvements 16,583    
Costs capitalized subsequent to acquisition 8,529    
Gross amount carried at close of period      
Land and improvements 4,187    
Buildings and improvements 25,099    
Total 29,286    
Accumulated depreciation $ (18,157)    
Date of construction 1976    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 29,286    
Accumulated depreciation:      
Balance at the end of year $ 18,157    
Unencumbered Apartment Communities | Country Villas | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Country Villas | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Courtyard off Main      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 110    
Initial cost      
Land $ 7,465    
Buildings and improvements 21,405    
Costs capitalized subsequent to acquisition 8,318    
Gross amount carried at close of period      
Land and improvements 7,465    
Buildings and improvements 29,723    
Total 37,188    
Accumulated depreciation $ (15,430)    
Date of construction 2000    
Date acquired Oct-10    
Rental properties:      
Balance at the end of year $ 37,188    
Accumulated depreciation:      
Balance at the end of year $ 15,430    
Unencumbered Apartment Communities | Courtyard off Main | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Courtyard off Main | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Crow Canyon      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 400    
Initial cost      
Land $ 37,579    
Buildings and improvements 87,685    
Costs capitalized subsequent to acquisition 20,779    
Gross amount carried at close of period      
Land and improvements 37,579    
Buildings and improvements 108,464    
Total 146,043    
Accumulated depreciation $ (46,233)    
Date of construction 1992    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 146,043    
Accumulated depreciation:      
Balance at the end of year $ 46,233    
Unencumbered Apartment Communities | Crow Canyon | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Crow Canyon | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Deer Valley      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 171    
Initial cost      
Land $ 21,478    
Buildings and improvements 50,116    
Costs capitalized subsequent to acquisition 6,589    
Gross amount carried at close of period      
Land and improvements 21,478    
Buildings and improvements 56,705    
Total 78,183    
Accumulated depreciation $ (22,859)    
Date of construction 1996    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 78,183    
Accumulated depreciation:      
Balance at the end of year $ 22,859    
Unencumbered Apartment Communities | Deer Valley | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Deer Valley | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Domaine      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 92    
Initial cost      
Land $ 9,059    
Buildings and improvements 27,177    
Costs capitalized subsequent to acquisition 2,099    
Gross amount carried at close of period      
Land and improvements 9,059    
Buildings and improvements 29,276    
Total 38,335    
Accumulated depreciation $ (12,666)    
Date of construction 2009    
Date acquired Sep-12    
Rental properties:      
Balance at the end of year $ 38,335    
Accumulated depreciation:      
Balance at the end of year $ 12,666    
Unencumbered Apartment Communities | Elevation      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 158    
Initial cost      
Land $ 4,758    
Buildings and improvements 14,285    
Costs capitalized subsequent to acquisition 9,197    
Gross amount carried at close of period      
Land and improvements 4,757    
Buildings and improvements 23,483    
Total 28,240    
Accumulated depreciation $ (14,554)    
Date of construction 1986    
Date acquired Jun-10    
Rental properties:      
Balance at the end of year $ 28,240    
Accumulated depreciation:      
Balance at the end of year $ 14,554    
Unencumbered Apartment Communities | Elevation | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Elevation | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Ellington      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 220    
Initial cost      
Land $ 15,066    
Buildings and improvements 45,249    
Costs capitalized subsequent to acquisition 7,484    
Gross amount carried at close of period      
Land and improvements 15,066    
Buildings and improvements 52,733    
Total 67,799    
Accumulated depreciation $ (20,386)    
Date of construction 1994    
Date acquired Jul-14    
Rental properties:      
Balance at the end of year $ 67,799    
Accumulated depreciation:      
Balance at the end of year $ 20,386    
Unencumbered Apartment Communities | Ellington | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Ellington | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Emerald Pointe      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 160    
Initial cost      
Land $ 8,458    
Buildings and improvements 33,832    
Costs capitalized subsequent to acquisition 4,343    
Gross amount carried at close of period      
Land and improvements 8,458    
Buildings and improvements 38,175    
Total 46,633    
Accumulated depreciation $ (15,205)    
Date of construction 1989    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 46,633    
Accumulated depreciation:      
Balance at the end of year $ 15,205    
Unencumbered Apartment Communities | Emerald Pointe | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Emerald Pointe | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Emerald Ridge      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 180    
Initial cost      
Land $ 3,449    
Buildings and improvements 7,801    
Costs capitalized subsequent to acquisition 9,070    
Gross amount carried at close of period      
Land and improvements 3,449    
Buildings and improvements 16,871    
Total 20,320    
Accumulated depreciation $ (15,099)    
Date of construction 1987    
Date acquired Nov-94    
Rental properties:      
Balance at the end of year $ 20,320    
Accumulated depreciation:      
Balance at the end of year $ 15,099    
Unencumbered Apartment Communities | Emerald Ridge | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Emerald Ridge | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Emerson Valley Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 144    
Initial cost      
Land $ 13,378    
Buildings and improvements 53,240    
Costs capitalized subsequent to acquisition 3,156    
Gross amount carried at close of period      
Land and improvements 13,378    
Buildings and improvements 56,396    
Total 69,774    
Accumulated depreciation $ (16,181)    
Date of construction 2012    
Date acquired Dec-16    
Rental properties:      
Balance at the end of year $ 69,774    
Accumulated depreciation:      
Balance at the end of year $ 16,181    
Unencumbered Apartment Communities | Emerson Valley Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Emerson Valley Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Emme      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 190    
Initial cost      
Land $ 15,039    
Buildings and improvements 80,532    
Costs capitalized subsequent to acquisition 2,260    
Gross amount carried at close of period      
Land and improvements 15,039    
Buildings and improvements 82,792    
Total 97,831    
Accumulated depreciation $ (14,703)    
Date of construction 2015    
Date acquired Jan-20    
Rental properties:      
Balance at the end of year $ 97,831    
Accumulated depreciation:      
Balance at the end of year $ 14,703    
Unencumbered Apartment Communities | Emme | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Emme | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Enso      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 183    
Initial cost      
Land $ 21,397    
Buildings and improvements 71,135    
Costs capitalized subsequent to acquisition 5,060    
Gross amount carried at close of period      
Land and improvements 21,397    
Buildings and improvements 76,195    
Total 97,592    
Accumulated depreciation $ (24,023)    
Date of construction 2014    
Date acquired Dec-15    
Rental properties:      
Balance at the end of year $ 97,592    
Accumulated depreciation:      
Balance at the end of year $ 24,023    
Unencumbered Apartment Communities | Enso | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Enso | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Epic      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 769    
Initial cost      
Land $ 89,111    
Buildings and improvements 307,769    
Costs capitalized subsequent to acquisition 7,086    
Gross amount carried at close of period      
Land and improvements 89,111    
Buildings and improvements 314,855    
Total 403,966    
Accumulated depreciation $ (55,274)    
Date of construction 2013    
Date acquired Jan-20    
Rental properties:      
Balance at the end of year $ 403,966    
Accumulated depreciation:      
Balance at the end of year $ 55,274    
Unencumbered Apartment Communities | Epic | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Epic | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Esplanade      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 278    
Initial cost      
Land $ 18,170    
Buildings and improvements 40,086    
Costs capitalized subsequent to acquisition 19,572    
Gross amount carried at close of period      
Land and improvements 18,429    
Buildings and improvements 59,399    
Total 77,828    
Accumulated depreciation $ (43,040)    
Date of construction 2002    
Date acquired Apr-04    
Rental properties:      
Balance at the end of year $ 77,828    
Accumulated depreciation:      
Balance at the end of year $ 43,040    
Unencumbered Apartment Communities | Esplanade | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Esplanade | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Esplanade San Diego      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 616    
Initial cost      
Land $ 56,327    
Buildings and improvements 167,072    
Costs capitalized subsequent to acquisition 1,877    
Gross amount carried at close of period      
Land and improvements 56,327    
Buildings and improvements 168,949    
Total 225,276    
Accumulated depreciation $ (4,588)    
Date of construction 1986    
Date acquired Mar'24    
Rental properties:      
Balance at the end of year $ 225,276    
Accumulated depreciation:      
Balance at the end of year $ 4,588    
Unencumbered Apartment Communities | Esplanade San Diego | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Esplanade San Diego | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Essex Skyline      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 350    
Initial cost      
Land $ 21,537    
Buildings and improvements 146,099    
Costs capitalized subsequent to acquisition 21,482    
Gross amount carried at close of period      
Land and improvements 21,537    
Buildings and improvements 167,581    
Total 189,118    
Accumulated depreciation $ (76,073)    
Date of construction 2008    
Date acquired Apr-10    
Rental properties:      
Balance at the end of year $ 189,118    
Accumulated depreciation:      
Balance at the end of year $ 76,073    
Unencumbered Apartment Communities | Essex Skyline | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Essex Skyline | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Evergreen Heights      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 200    
Initial cost      
Land $ 3,566    
Buildings and improvements 13,395    
Costs capitalized subsequent to acquisition 9,922    
Gross amount carried at close of period      
Land and improvements 3,649    
Buildings and improvements 23,234    
Total 26,883    
Accumulated depreciation $ (19,870)    
Date of construction 1990    
Date acquired Jun-97    
Rental properties:      
Balance at the end of year $ 26,883    
Accumulated depreciation:      
Balance at the end of year $ 19,870    
Unencumbered Apartment Communities | Evergreen Heights | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Evergreen Heights | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Fairhaven      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 164    
Initial cost      
Land $ 2,626    
Buildings and improvements 10,485    
Costs capitalized subsequent to acquisition 12,166    
Gross amount carried at close of period      
Land and improvements 2,957    
Buildings and improvements 22,320    
Total 25,277    
Accumulated depreciation $ (17,941)    
Date of construction 1970    
Date acquired Nov-01    
Rental properties:      
Balance at the end of year $ 25,277    
Accumulated depreciation:      
Balance at the end of year $ 17,941    
Unencumbered Apartment Communities | Fairway at Big Canyon      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 74    
Initial cost      
Land $ 0    
Buildings and improvements 7,850    
Costs capitalized subsequent to acquisition 9,938    
Gross amount carried at close of period      
Land and improvements 0    
Buildings and improvements 17,788    
Total 17,788    
Accumulated depreciation $ (16,123)    
Date of construction 1972    
Date acquired Jun-99    
Rental properties:      
Balance at the end of year $ 17,788    
Accumulated depreciation:      
Balance at the end of year $ 16,123    
Unencumbered Apartment Communities | Fairway at Big Canyon | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fairway at Big Canyon | Maximum      
Gross amount carried at close of period      
Life used for depreciation 28 years    
Unencumbered Apartment Communities | Fairwood Pond      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 194    
Initial cost      
Land $ 5,296    
Buildings and improvements 15,564    
Costs capitalized subsequent to acquisition 7,554    
Gross amount carried at close of period      
Land and improvements 5,297    
Buildings and improvements 23,117    
Total 28,414    
Accumulated depreciation $ (15,439)    
Date of construction 1997    
Date acquired Oct-04    
Rental properties:      
Balance at the end of year $ 28,414    
Accumulated depreciation:      
Balance at the end of year $ 15,439    
Unencumbered Apartment Communities | Fairwood Pond | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fairwood Pond | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Foothill Commons      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 394    
Initial cost      
Land $ 2,435    
Buildings and improvements 9,821    
Costs capitalized subsequent to acquisition 45,633    
Gross amount carried at close of period      
Land and improvements 2,440    
Buildings and improvements 55,449    
Total 57,889    
Accumulated depreciation $ (51,958)    
Date of construction 1978    
Date acquired Mar-90    
Rental properties:      
Balance at the end of year $ 57,889    
Accumulated depreciation:      
Balance at the end of year $ 51,958    
Unencumbered Apartment Communities | Foothill Commons | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Foothill Commons | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Foothill Gardens/Twin Creeks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 176    
Initial cost      
Land $ 5,875    
Buildings and improvements 13,992    
Costs capitalized subsequent to acquisition 15,883    
Gross amount carried at close of period      
Land and improvements 5,964    
Buildings and improvements 29,786    
Total 35,750    
Accumulated depreciation $ (25,371)    
Date of construction 1985    
Date acquired Feb-97    
Rental properties:      
Balance at the end of year $ 35,750    
Accumulated depreciation:      
Balance at the end of year $ 25,371    
Unencumbered Apartment Communities | Foothill Gardens/Twin Creeks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Foothill Gardens/Twin Creeks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Forest View      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 192    
Initial cost      
Land $ 3,731    
Buildings and improvements 14,530    
Costs capitalized subsequent to acquisition 6,058    
Gross amount carried at close of period      
Land and improvements 3,731    
Buildings and improvements 20,588    
Total 24,319    
Accumulated depreciation $ (14,204)    
Date of construction 1998    
Date acquired Oct-03    
Rental properties:      
Balance at the end of year $ 24,319    
Accumulated depreciation:      
Balance at the end of year $ 14,204    
Unencumbered Apartment Communities | Forest View | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Forest View | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Form 15      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 242    
Initial cost      
Land $ 24,510    
Buildings and improvements 72,221    
Costs capitalized subsequent to acquisition 15,679    
Gross amount carried at close of period      
Land and improvements 25,540    
Buildings and improvements 86,870    
Total 112,410    
Accumulated depreciation $ (27,976)    
Date of construction 2014    
Date acquired Mar-16    
Rental properties:      
Balance at the end of year $ 112,410    
Accumulated depreciation:      
Balance at the end of year $ 27,976    
Unencumbered Apartment Communities | Foster’s Landing      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 490    
Initial cost      
Land $ 61,714    
Buildings and improvements 144,000    
Costs capitalized subsequent to acquisition 20,558    
Gross amount carried at close of period      
Land and improvements 61,714    
Buildings and improvements 164,558    
Total 226,272    
Accumulated depreciation $ (66,777)    
Date of construction 1987    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 226,272    
Accumulated depreciation:      
Balance at the end of year $ 66,777    
Unencumbered Apartment Communities | Fountain Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 320    
Initial cost      
Land $ 6,702    
Buildings and improvements 27,306    
Costs capitalized subsequent to acquisition 16,992    
Gross amount carried at close of period      
Land and improvements 6,985    
Buildings and improvements 44,015    
Total 51,000    
Accumulated depreciation $ (36,974)    
Date of construction 2000    
Date acquired Mar-00    
Rental properties:      
Balance at the end of year $ 51,000    
Accumulated depreciation:      
Balance at the end of year $ 36,974    
Unencumbered Apartment Communities | Fountain Court | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fountain Court | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Fountains at River Oaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 226    
Initial cost      
Land $ 26,046    
Buildings and improvements 60,773    
Costs capitalized subsequent to acquisition 9,393    
Gross amount carried at close of period      
Land and improvements 26,046    
Buildings and improvements 70,166    
Total 96,212    
Accumulated depreciation $ (29,054)    
Date of construction 1990    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 96,212    
Accumulated depreciation:      
Balance at the end of year $ 29,054    
Unencumbered Apartment Communities | Fountains at River Oaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fountains at River Oaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Fourth & U      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 171    
Initial cost      
Land $ 8,879    
Buildings and improvements 52,351    
Costs capitalized subsequent to acquisition 6,399    
Gross amount carried at close of period      
Land and improvements 8,879    
Buildings and improvements 58,750    
Total 67,629    
Accumulated depreciation $ (30,066)    
Date of construction 2010    
Date acquired Apr-10    
Rental properties:      
Balance at the end of year $ 67,629    
Accumulated depreciation:      
Balance at the end of year $ 30,066    
Unencumbered Apartment Communities | Fourth & U | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fourth & U | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Fox Plaza      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 445    
Initial cost      
Land $ 39,731    
Buildings and improvements 92,706    
Costs capitalized subsequent to acquisition 44,873    
Gross amount carried at close of period      
Land and improvements 39,731    
Buildings and improvements 137,579    
Total 177,310    
Accumulated depreciation $ (70,634)    
Date of construction 1968    
Date acquired Feb-13    
Rental properties:      
Balance at the end of year $ 177,310    
Accumulated depreciation:      
Balance at the end of year $ 70,634    
Unencumbered Apartment Communities | Fox Plaza | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Fox Plaza | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Hacienda at Camarillo Oaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 73    
Initial cost      
Land $ 5,497    
Buildings and improvements 17,572    
Costs capitalized subsequent to acquisition 3,458    
Gross amount carried at close of period      
Land and improvements 5,497    
Buildings and improvements 21,030    
Total 26,527    
Accumulated depreciation $ (1,502)    
Date of construction 1984    
Date acquired Apr-23    
Rental properties:      
Balance at the end of year $ 26,527    
Accumulated depreciation:      
Balance at the end of year $ 1,502    
Unencumbered Apartment Communities | Hacienda at Camarillo Oaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Hacienda at Camarillo Oaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Henley I/The Henley II      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 215    
Initial cost      
Land $ 6,695    
Buildings and improvements 16,753    
Costs capitalized subsequent to acquisition 32,482    
Gross amount carried at close of period      
Land and improvements 6,733    
Buildings and improvements 49,197    
Total 55,930    
Accumulated depreciation $ (41,717)    
Date of construction 1970    
Date acquired Jun-99    
Rental properties:      
Balance at the end of year $ 55,930    
Accumulated depreciation:      
Balance at the end of year $ 41,717    
Unencumbered Apartment Communities | The Henley I/The Henley II | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Henley I/The Henley II | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Highlands at Wynhaven      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 333    
Initial cost      
Land $ 16,271    
Buildings and improvements 48,932    
Costs capitalized subsequent to acquisition 18,660    
Gross amount carried at close of period      
Land and improvements 16,271    
Buildings and improvements 67,592    
Total 83,863    
Accumulated depreciation $ (41,843)    
Date of construction 2000    
Date acquired Aug-08    
Rental properties:      
Balance at the end of year $ 83,863    
Accumulated depreciation:      
Balance at the end of year $ 41,843    
Unencumbered Apartment Communities | Highlands at Wynhaven | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Highlands at Wynhaven | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Hillcrest Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 608    
Initial cost      
Land $ 15,318    
Buildings and improvements 40,601    
Costs capitalized subsequent to acquisition 31,956    
Gross amount carried at close of period      
Land and improvements 15,755    
Buildings and improvements 72,120    
Total 87,875    
Accumulated depreciation $ (57,299)    
Date of construction 1973    
Date acquired Mar-98    
Rental properties:      
Balance at the end of year $ 87,875    
Accumulated depreciation:      
Balance at the end of year $ 57,299    
Unencumbered Apartment Communities | Hillcrest Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Hillcrest Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Hope Ranch      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 108    
Initial cost      
Land $ 4,078    
Buildings and improvements 16,877    
Costs capitalized subsequent to acquisition 4,461    
Gross amount carried at close of period      
Land and improvements 4,208    
Buildings and improvements 21,208    
Total 25,416    
Accumulated depreciation $ (12,645)    
Date of construction 1965    
Date acquired Mar-07    
Rental properties:      
Balance at the end of year $ 25,416    
Accumulated depreciation:      
Balance at the end of year $ 12,645    
Unencumbered Apartment Communities | Hope Ranch | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Hope Ranch | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Huntington Breakers      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 344    
Initial cost      
Land $ 9,306    
Buildings and improvements 22,720    
Costs capitalized subsequent to acquisition 27,255    
Gross amount carried at close of period      
Land and improvements 9,315    
Buildings and improvements 49,966    
Total 59,281    
Accumulated depreciation $ (43,531)    
Date of construction 1984    
Date acquired Oct-97    
Rental properties:      
Balance at the end of year $ 59,281    
Accumulated depreciation:      
Balance at the end of year $ 43,531    
Unencumbered Apartment Communities | Huntington Breakers | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Huntington Breakers | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Inglenook Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 224    
Initial cost      
Land $ 3,467    
Buildings and improvements 7,881    
Costs capitalized subsequent to acquisition 11,193    
Gross amount carried at close of period      
Land and improvements 3,474    
Buildings and improvements 19,067    
Total 22,541    
Accumulated depreciation $ (16,748)    
Date of construction 1985    
Date acquired Oct-94    
Rental properties:      
Balance at the end of year $ 22,541    
Accumulated depreciation:      
Balance at the end of year $ 16,748    
Unencumbered Apartment Communities | Inglenook Court | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Inglenook Court | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Lafayette Highlands      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 150    
Initial cost      
Land $ 17,774    
Buildings and improvements 41,473    
Costs capitalized subsequent to acquisition 10,779    
Gross amount carried at close of period      
Land and improvements 17,774    
Buildings and improvements 52,252    
Total 70,026    
Accumulated depreciation $ (21,184)    
Date of construction 1973    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 70,026    
Accumulated depreciation:      
Balance at the end of year $ 21,184    
Unencumbered Apartment Communities | Lafayette Highlands | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Lafayette Highlands | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Lakeshore Landing      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 308    
Initial cost      
Land $ 38,155    
Buildings and improvements 89,028    
Costs capitalized subsequent to acquisition 17,132    
Gross amount carried at close of period      
Land and improvements 38,155    
Buildings and improvements 106,160    
Total 144,315    
Accumulated depreciation $ (43,318)    
Date of construction 1988    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 144,315    
Accumulated depreciation:      
Balance at the end of year $ 43,318    
Unencumbered Apartment Communities | Lakeshore Landing | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Lakeshore Landing | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Laurels at Mill Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 164    
Initial cost      
Land $ 1,559    
Buildings and improvements 6,430    
Costs capitalized subsequent to acquisition 10,003    
Gross amount carried at close of period      
Land and improvements 1,595    
Buildings and improvements 16,397    
Total 17,992    
Accumulated depreciation $ (14,195)    
Date of construction 1981    
Date acquired Dec-96    
Rental properties:      
Balance at the end of year $ 17,992    
Accumulated depreciation:      
Balance at the end of year $ 14,195    
Unencumbered Apartment Communities | Laurels at Mill Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Laurels at Mill Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Le Parc      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 140    
Initial cost      
Land $ 3,090    
Buildings and improvements 7,421    
Costs capitalized subsequent to acquisition 16,616    
Gross amount carried at close of period      
Land and improvements 3,092    
Buildings and improvements 24,035    
Total 27,127    
Accumulated depreciation $ (20,884)    
Date of construction 1975    
Date acquired Feb-94    
Rental properties:      
Balance at the end of year $ 27,127    
Accumulated depreciation:      
Balance at the end of year $ 20,884    
Unencumbered Apartment Communities | Le Parc | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Le Parc | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Marbrisa      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 202    
Initial cost      
Land $ 4,700    
Buildings and improvements 18,605    
Costs capitalized subsequent to acquisition 12,968    
Gross amount carried at close of period      
Land and improvements 4,760    
Buildings and improvements 31,513    
Total 36,273    
Accumulated depreciation $ (23,986)    
Date of construction 1987    
Date acquired Sep-02    
Rental properties:      
Balance at the end of year $ 36,273    
Accumulated depreciation:      
Balance at the end of year $ 23,986    
Unencumbered Apartment Communities | Marbrisa | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Marbrisa | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Marina City Club      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 101    
Initial cost      
Land $ 0    
Buildings and improvements 28,167    
Costs capitalized subsequent to acquisition 35,838    
Gross amount carried at close of period      
Land and improvements 0    
Buildings and improvements 64,005    
Total 64,005    
Accumulated depreciation $ (43,803)    
Date of construction 1971    
Date acquired Jan-04    
Rental properties:      
Balance at the end of year $ 64,005    
Accumulated depreciation:      
Balance at the end of year $ 43,803    
Unencumbered Apartment Communities | Marina City Club | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Marina City Club | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Marina Cove      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 292    
Initial cost      
Land $ 5,320    
Buildings and improvements 16,431    
Costs capitalized subsequent to acquisition 21,114    
Gross amount carried at close of period      
Land and improvements 5,324    
Buildings and improvements 37,541    
Total 42,865    
Accumulated depreciation $ (33,764)    
Date of construction 1974    
Date acquired Jun-94    
Rental properties:      
Balance at the end of year $ 42,865    
Accumulated depreciation:      
Balance at the end of year $ 33,764    
Unencumbered Apartment Communities | Marina Cove | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Marina Cove | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mariner’s Place      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 105    
Initial cost      
Land $ 1,555    
Buildings and improvements 6,103    
Costs capitalized subsequent to acquisition 4,191    
Gross amount carried at close of period      
Land and improvements 1,562    
Buildings and improvements 10,287    
Total 11,849    
Accumulated depreciation $ (7,896)    
Date of construction 1987    
Date acquired May-00    
Rental properties:      
Balance at the end of year $ 11,849    
Accumulated depreciation:      
Balance at the end of year $ 7,896    
Unencumbered Apartment Communities | Mariner’s Place | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mariner’s Place | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Maxwell Sunnyvale      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 75    
Initial cost      
Land $ 9,710    
Buildings and improvements 37,292    
Costs capitalized subsequent to acquisition 354    
Gross amount carried at close of period      
Land and improvements 9,710    
Buildings and improvements 37,646    
Total 47,356    
Accumulated depreciation $ (941)    
Date of construction 2022    
Date acquired Apr-24    
Rental properties:      
Balance at the end of year $ 47,356    
Accumulated depreciation:      
Balance at the end of year $ 941    
Unencumbered Apartment Communities | Maxwell Sunnyvale | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Maxwell Sunnyvale | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | MB 360      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 360    
Initial cost      
Land $ 42,001    
Buildings and improvements 212,648    
Costs capitalized subsequent to acquisition 21,774    
Gross amount carried at close of period      
Land and improvements 42,001    
Buildings and improvements 234,422    
Total 276,423    
Accumulated depreciation $ (81,350)    
Date of construction 2014    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 276,423    
Accumulated depreciation:      
Balance at the end of year $ 81,350    
Unencumbered Apartment Communities | MB 360 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | MB 360 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Meadowood      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 320    
Initial cost      
Land $ 19,080    
Buildings and improvements 98,881    
Costs capitalized subsequent to acquisition 326    
Gross amount carried at close of period      
Land and improvements 19,080    
Buildings and improvements 99,207    
Total 118,287    
Accumulated depreciation $ (723)    
Date of construction 1986    
Date acquired Oct-24    
Rental properties:      
Balance at the end of year $ 118,287    
Accumulated depreciation:      
Balance at the end of year $ 723    
Unencumbered Apartment Communities | Meadowood | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Meadowood | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mesa Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 133    
Initial cost      
Land $ 1,888    
Buildings and improvements 7,498    
Costs capitalized subsequent to acquisition 3,722    
Gross amount carried at close of period      
Land and improvements 1,894    
Buildings and improvements 11,214    
Total 13,108    
Accumulated depreciation $ (8,287)    
Date of construction 1963    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 13,108    
Accumulated depreciation:      
Balance at the end of year $ 8,287    
Unencumbered Apartment Communities | Mesa Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mesa Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mill Creek at Windermere      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 400    
Initial cost      
Land $ 29,551    
Buildings and improvements 69,032    
Costs capitalized subsequent to acquisition 15,451    
Gross amount carried at close of period      
Land and improvements 29,551    
Buildings and improvements 84,483    
Total 114,034    
Accumulated depreciation $ (48,820)    
Date of construction 2005    
Date acquired Sep-07    
Rental properties:      
Balance at the end of year $ 114,034    
Accumulated depreciation:      
Balance at the end of year $ 48,820    
Unencumbered Apartment Communities | Mill Creek at Windermere | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mill Creek at Windermere | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mio      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 103    
Initial cost      
Land $ 11,012    
Buildings and improvements 39,982    
Costs capitalized subsequent to acquisition 2,459    
Gross amount carried at close of period      
Land and improvements 11,012    
Buildings and improvements 42,441    
Total 53,453    
Accumulated depreciation $ (13,235)    
Date of construction 2015    
Date acquired Jan-16    
Rental properties:      
Balance at the end of year $ 53,453    
Accumulated depreciation:      
Balance at the end of year $ 13,235    
Unencumbered Apartment Communities | Mio | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mio | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mirabella      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 188    
Initial cost      
Land $ 6,180    
Buildings and improvements 26,673    
Costs capitalized subsequent to acquisition 20,688    
Gross amount carried at close of period      
Land and improvements 6,270    
Buildings and improvements 47,271    
Total 53,541    
Accumulated depreciation $ (35,477)    
Date of construction 2000    
Date acquired May-00    
Rental properties:      
Balance at the end of year $ 53,541    
Accumulated depreciation:      
Balance at the end of year $ 35,477    
Unencumbered Apartment Communities | Mirabella | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mirabella | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mira Monte      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 356    
Initial cost      
Land $ 7,165    
Buildings and improvements 28,459    
Costs capitalized subsequent to acquisition 17,894    
Gross amount carried at close of period      
Land and improvements 7,186    
Buildings and improvements 46,332    
Total 53,518    
Accumulated depreciation $ (34,344)    
Date of construction 1982    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 53,518    
Accumulated depreciation:      
Balance at the end of year $ 34,344    
Unencumbered Apartment Communities | Mira Monte | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mira Monte | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Miracle Mile/Marbella      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 236    
Initial cost      
Land $ 7,791    
Buildings and improvements 23,075    
Costs capitalized subsequent to acquisition 21,894    
Gross amount carried at close of period      
Land and improvements 7,886    
Buildings and improvements 44,874    
Total 52,760    
Accumulated depreciation $ (35,911)    
Date of construction 1988    
Date acquired Aug-97    
Rental properties:      
Balance at the end of year $ 52,760    
Accumulated depreciation:      
Balance at the end of year $ 35,911    
Unencumbered Apartment Communities | Miracle Mile/Marbella | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Miracle Mile/Marbella | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mission Hills      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 282    
Initial cost      
Land $ 10,099    
Buildings and improvements 38,778    
Costs capitalized subsequent to acquisition 17,118    
Gross amount carried at close of period      
Land and improvements 10,167    
Buildings and improvements 55,828    
Total 65,995    
Accumulated depreciation $ (37,759)    
Date of construction 1984    
Date acquired Jul-05    
Rental properties:      
Balance at the end of year $ 65,995    
Accumulated depreciation:      
Balance at the end of year $ 37,759    
Unencumbered Apartment Communities | Mission Hills | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mission Hills | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mission Peaks      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 453    
Initial cost      
Land $ 46,499    
Buildings and improvements 108,498    
Costs capitalized subsequent to acquisition 15,207    
Gross amount carried at close of period      
Land and improvements 46,499    
Buildings and improvements 123,705    
Total 170,204    
Accumulated depreciation $ (49,879)    
Date of construction 1995    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 170,204    
Accumulated depreciation:      
Balance at the end of year $ 49,879    
Unencumbered Apartment Communities | Mission Peaks | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Mission Peaks | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mission Peaks II      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 336    
Initial cost      
Land $ 31,429    
Buildings and improvements 73,334    
Costs capitalized subsequent to acquisition 13,448    
Gross amount carried at close of period      
Land and improvements 31,429    
Buildings and improvements 86,782    
Total 118,211    
Accumulated depreciation $ (36,113)    
Date of construction 1989    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 118,211    
Accumulated depreciation:      
Balance at the end of year $ 36,113    
Unencumbered Apartment Communities | Mission Peaks II | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Mission Peaks II | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Montanosa      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 472    
Initial cost      
Land $ 26,697    
Buildings and improvements 106,787    
Costs capitalized subsequent to acquisition 17,053    
Gross amount carried at close of period      
Land and improvements 26,697    
Buildings and improvements 123,840    
Total 150,537    
Accumulated depreciation $ (48,451)    
Date of construction 1990    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 150,537    
Accumulated depreciation:      
Balance at the end of year $ 48,451    
Unencumbered Apartment Communities | Montclaire      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 390    
Initial cost      
Land $ 4,842    
Buildings and improvements 19,776    
Costs capitalized subsequent to acquisition 32,880    
Gross amount carried at close of period      
Land and improvements 4,997    
Buildings and improvements 52,501    
Total 57,498    
Accumulated depreciation $ (48,678)    
Date of construction 1973    
Date acquired Dec-88    
Rental properties:      
Balance at the end of year $ 57,498    
Accumulated depreciation:      
Balance at the end of year $ 48,678    
Unencumbered Apartment Communities | Montclaire | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Montclaire | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Montebello      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 248    
Initial cost      
Land $ 13,857    
Buildings and improvements 41,575    
Costs capitalized subsequent to acquisition 17,797    
Gross amount carried at close of period      
Land and improvements 13,858    
Buildings and improvements 59,371    
Total 73,229    
Accumulated depreciation $ (26,304)    
Date of construction 1996    
Date acquired Jul-12    
Rental properties:      
Balance at the end of year $ 73,229    
Accumulated depreciation:      
Balance at the end of year $ 26,304    
Unencumbered Apartment Communities | Montejo      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 124    
Initial cost      
Land $ 1,925    
Buildings and improvements 7,685    
Costs capitalized subsequent to acquisition 6,515    
Gross amount carried at close of period      
Land and improvements 2,194    
Buildings and improvements 13,931    
Total 16,125    
Accumulated depreciation $ (10,164)    
Date of construction 1974    
Date acquired Nov-01    
Rental properties:      
Balance at the end of year $ 16,125    
Accumulated depreciation:      
Balance at the end of year $ 10,164    
Unencumbered Apartment Communities | Monterey Villas      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 122    
Initial cost      
Land $ 2,349    
Buildings and improvements 5,579    
Costs capitalized subsequent to acquisition 9,583    
Gross amount carried at close of period      
Land and improvements 2,424    
Buildings and improvements 15,087    
Total 17,511    
Accumulated depreciation $ (11,828)    
Date of construction 1974    
Date acquired Jul-97    
Rental properties:      
Balance at the end of year $ 17,511    
Accumulated depreciation:      
Balance at the end of year $ 11,828    
Unencumbered Apartment Communities | Monterey Villas | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Monterey Villas | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Muse      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 152    
Initial cost      
Land $ 7,822    
Buildings and improvements 33,436    
Costs capitalized subsequent to acquisition 7,562    
Gross amount carried at close of period      
Land and improvements 7,823    
Buildings and improvements 40,997    
Total 48,820    
Accumulated depreciation $ (21,412)    
Date of construction 2011    
Date acquired Feb-11    
Rental properties:      
Balance at the end of year $ 48,820    
Accumulated depreciation:      
Balance at the end of year $ 21,412    
Unencumbered Apartment Communities | Muse | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Muse | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Mylo      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 476    
Initial cost      
Land $ 6,472    
Buildings and improvements 206,098    
Costs capitalized subsequent to acquisition 1,347    
Gross amount carried at close of period      
Land and improvements 6,472    
Buildings and improvements 207,445    
Total 213,917    
Accumulated depreciation $ (45,311)    
Date of construction 2021    
Date acquired Jun-21    
Rental properties:      
Balance at the end of year $ 213,917    
Accumulated depreciation:      
Balance at the end of year $ 45,311    
Unencumbered Apartment Communities | Mylo | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Mylo | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | 1000 Kiely      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 121    
Initial cost      
Land $ 9,359    
Buildings and improvements 21,845    
Costs capitalized subsequent to acquisition 11,909    
Gross amount carried at close of period      
Land and improvements 9,359    
Buildings and improvements 33,754    
Total 43,113    
Accumulated depreciation $ (19,179)    
Date of construction 1971    
Date acquired Mar-11    
Rental properties:      
Balance at the end of year $ 43,113    
Accumulated depreciation:      
Balance at the end of year $ 19,179    
Unencumbered Apartment Communities | Palm Valley      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 1,100    
Initial cost      
Land $ 133,802    
Buildings and improvements 312,205    
Costs capitalized subsequent to acquisition 39,204    
Gross amount carried at close of period      
Land and improvements 133,802    
Buildings and improvements 351,409    
Total 485,211    
Accumulated depreciation $ (106,045)    
Date of construction 2008    
Date acquired Jan-17    
Rental properties:      
Balance at the end of year $ 485,211    
Accumulated depreciation:      
Balance at the end of year $ 106,045    
Unencumbered Apartment Communities | Palm Valley | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Palm Valley | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Park Catalina      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 90    
Initial cost      
Land $ 4,710    
Buildings and improvements 18,839    
Costs capitalized subsequent to acquisition 5,786    
Gross amount carried at close of period      
Land and improvements 4,710    
Buildings and improvements 24,625    
Total 29,335    
Accumulated depreciation $ (11,750)    
Date of construction 2002    
Date acquired Jun-12    
Rental properties:      
Balance at the end of year $ 29,335    
Accumulated depreciation:      
Balance at the end of year $ 11,750    
Unencumbered Apartment Communities | Park Catalina | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Park Catalina | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Park Highland      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 250    
Initial cost      
Land $ 9,391    
Buildings and improvements 38,224    
Costs capitalized subsequent to acquisition 16,556    
Gross amount carried at close of period      
Land and improvements 9,391    
Buildings and improvements 54,780    
Total 64,171    
Accumulated depreciation $ (27,673)    
Date of construction 1993    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 64,171    
Accumulated depreciation:      
Balance at the end of year $ 27,673    
Unencumbered Apartment Communities | Park Highland | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Park Highland | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Park Hill at Issaquah      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 245    
Initial cost      
Land $ 7,284    
Buildings and improvements 21,937    
Costs capitalized subsequent to acquisition 15,787    
Gross amount carried at close of period      
Land and improvements 7,284    
Buildings and improvements 37,724    
Total 45,008    
Accumulated depreciation $ (26,506)    
Date of construction 1999    
Date acquired Feb-99    
Rental properties:      
Balance at the end of year $ 45,008    
Accumulated depreciation:      
Balance at the end of year $ 26,506    
Unencumbered Apartment Communities | Park Hill at Issaquah | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Park Hill at Issaquah | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Park Viridian      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 320    
Initial cost      
Land $ 15,894    
Buildings and improvements 63,574    
Costs capitalized subsequent to acquisition 10,145    
Gross amount carried at close of period      
Land and improvements 15,894    
Buildings and improvements 73,719    
Total 89,613    
Accumulated depreciation $ (28,459)    
Date of construction 2008    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 89,613    
Accumulated depreciation:      
Balance at the end of year $ 28,459    
Unencumbered Apartment Communities | Park Viridian | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Park Viridian | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Park West      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 126    
Initial cost      
Land $ 9,424    
Buildings and improvements 21,988    
Costs capitalized subsequent to acquisition 14,958    
Gross amount carried at close of period      
Land and improvements 9,424    
Buildings and improvements 36,946    
Total 46,370    
Accumulated depreciation $ (21,882)    
Date of construction 1958    
Date acquired Sep-12    
Rental properties:      
Balance at the end of year $ 46,370    
Accumulated depreciation:      
Balance at the end of year $ 21,882    
Unencumbered Apartment Communities | Park West | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Park West | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Parkside Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 210    
Initial cost      
Land $ 11,276    
Buildings and improvements 47,272    
Costs capitalized subsequent to acquisition 1,121    
Gross amount carried at close of period      
Land and improvements 11,276    
Buildings and improvements 48,393    
Total 59,669    
Accumulated depreciation $ (1,357)    
Date of construction 1986    
Date acquired Mar-24    
Rental properties:      
Balance at the end of year $ 59,669    
Accumulated depreciation:      
Balance at the end of year $ 1,357    
Unencumbered Apartment Communities | Parkside Court | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Parkside Court | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Parkwood at Mill Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 240    
Initial cost      
Land $ 10,680    
Buildings and improvements 42,722    
Costs capitalized subsequent to acquisition 5,267    
Gross amount carried at close of period      
Land and improvements 10,680    
Buildings and improvements 47,989    
Total 58,669    
Accumulated depreciation $ (19,461)    
Date of construction 1989    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 58,669    
Accumulated depreciation:      
Balance at the end of year $ 19,461    
Unencumbered Apartment Communities | Parkwood at Mill Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Parkwood at Mill Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Patina at Midtown      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 269    
Initial cost      
Land $ 13,472    
Buildings and improvements 102,940    
Costs capitalized subsequent to acquisition 685    
Gross amount carried at close of period      
Land and improvements 13,472    
Buildings and improvements 103,625    
Total 117,097    
Accumulated depreciation $ (1,645)    
Date of construction 2021    
Date acquired Jul-24    
Rental properties:      
Balance at the end of year $ 117,097    
Accumulated depreciation:      
Balance at the end of year $ 1,645    
Unencumbered Apartment Communities | Patina at Midtown | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Patina at Midtown | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Patent 523      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 295    
Initial cost      
Land $ 14,558    
Buildings and improvements 69,417    
Costs capitalized subsequent to acquisition 9,468    
Gross amount carried at close of period      
Land and improvements 14,558    
Buildings and improvements 78,885    
Total 93,443    
Accumulated depreciation $ (41,215)    
Date of construction 2010    
Date acquired Mar-10    
Rental properties:      
Balance at the end of year $ 93,443    
Accumulated depreciation:      
Balance at the end of year $ 41,215    
Unencumbered Apartment Communities | Patent 523 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Patent 523 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pathways at Bixby Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 296    
Initial cost      
Land $ 4,083    
Buildings and improvements 16,757    
Costs capitalized subsequent to acquisition 24,767    
Gross amount carried at close of period      
Land and improvements 6,239    
Buildings and improvements 39,368    
Total 45,607    
Accumulated depreciation $ (36,342)    
Date of construction 1975    
Date acquired Feb-91    
Rental properties:      
Balance at the end of year $ 45,607    
Accumulated depreciation:      
Balance at the end of year $ 36,342    
Unencumbered Apartment Communities | Pathways at Bixby Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Pathways at Bixby Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Piedmont      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 396    
Initial cost      
Land $ 19,848    
Buildings and improvements 59,606    
Costs capitalized subsequent to acquisition 22,517    
Gross amount carried at close of period      
Land and improvements 19,848    
Buildings and improvements 82,123    
Total 101,971    
Accumulated depreciation $ (36,329)    
Date of construction 1969    
Date acquired May-14    
Rental properties:      
Balance at the end of year $ 101,971    
Accumulated depreciation:      
Balance at the end of year $ 36,329    
Unencumbered Apartment Communities | Piedmont | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Piedmont | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinehurst      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 28    
Initial cost      
Land $ 0    
Buildings and improvements 1,711    
Costs capitalized subsequent to acquisition 1,151    
Gross amount carried at close of period      
Land and improvements 0    
Buildings and improvements 2,862    
Total 2,862    
Accumulated depreciation $ (2,217)    
Date of construction 1973    
Date acquired Dec-04    
Rental properties:      
Balance at the end of year $ 2,862    
Accumulated depreciation:      
Balance at the end of year $ 2,217    
Unencumbered Apartment Communities | Pinehurst | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Pinehurst | Maximum      
Gross amount carried at close of period      
Life used for depreciation 24 years    
Unencumbered Apartment Communities | Pinnacle at Fullerton      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 192    
Initial cost      
Land $ 11,019    
Buildings and improvements 45,932    
Costs capitalized subsequent to acquisition 8,000    
Gross amount carried at close of period      
Land and improvements 11,019    
Buildings and improvements 53,932    
Total 64,951    
Accumulated depreciation $ (21,868)    
Date of construction 2004    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 64,951    
Accumulated depreciation:      
Balance at the end of year $ 21,868    
Unencumbered Apartment Communities | Pinnacle at Fullerton | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle at Fullerton | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinnacle on Lake Washington      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 180    
Initial cost      
Land $ 7,760    
Buildings and improvements 31,041    
Costs capitalized subsequent to acquisition 6,549    
Gross amount carried at close of period      
Land and improvements 7,760    
Buildings and improvements 37,590    
Total 45,350    
Accumulated depreciation $ (15,814)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 45,350    
Accumulated depreciation:      
Balance at the end of year $ 15,814    
Unencumbered Apartment Communities | Pinnacle on Lake Washington | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle on Lake Washington | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinnacle at MacArthur Place      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 253    
Initial cost      
Land $ 15,810    
Buildings and improvements 66,401    
Costs capitalized subsequent to acquisition 11,852    
Gross amount carried at close of period      
Land and improvements 15,810    
Buildings and improvements 78,253    
Total 94,063    
Accumulated depreciation $ (30,868)    
Date of construction 2002    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 94,063    
Accumulated depreciation:      
Balance at the end of year $ 30,868    
Unencumbered Apartment Communities | Pinnacle at MacArthur Place | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle at MacArthur Place | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinnacle at Otay Ranch I & II      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 364    
Initial cost      
Land $ 17,023    
Buildings and improvements 68,093    
Costs capitalized subsequent to acquisition 9,703    
Gross amount carried at close of period      
Land and improvements 17,023    
Buildings and improvements 77,796    
Total 94,819    
Accumulated depreciation $ (30,820)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 94,819    
Accumulated depreciation:      
Balance at the end of year $ 30,820    
Unencumbered Apartment Communities | Pinnacle at Otay Ranch I & II | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle at Otay Ranch I & II | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinnacle at Talega      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 362    
Initial cost      
Land $ 19,292    
Buildings and improvements 77,168    
Costs capitalized subsequent to acquisition 11,717    
Gross amount carried at close of period      
Land and improvements 19,292    
Buildings and improvements 88,885    
Total 108,177    
Accumulated depreciation $ (33,864)    
Date of construction 2002    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 108,177    
Accumulated depreciation:      
Balance at the end of year $ 33,864    
Unencumbered Apartment Communities | Pinnacle at Talega | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle at Talega | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pinnacle Sonata      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 268    
Initial cost      
Land $ 14,647    
Buildings and improvements 58,586    
Costs capitalized subsequent to acquisition 10,548    
Gross amount carried at close of period      
Land and improvements 14,647    
Buildings and improvements 69,134    
Total 83,781    
Accumulated depreciation $ (28,131)    
Date of construction 2000    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 83,781    
Accumulated depreciation:      
Balance at the end of year $ 28,131    
Unencumbered Apartment Communities | Pinnacle Sonata | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Pinnacle Sonata | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pointe at Cupertino      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 116    
Initial cost      
Land $ 4,505    
Buildings and improvements 17,605    
Costs capitalized subsequent to acquisition 15,116    
Gross amount carried at close of period      
Land and improvements 4,505    
Buildings and improvements 32,721    
Total 37,226    
Accumulated depreciation $ (25,250)    
Date of construction 1963    
Date acquired Aug-98    
Rental properties:      
Balance at the end of year $ 37,226    
Accumulated depreciation:      
Balance at the end of year $ 25,250    
Unencumbered Apartment Communities | Pointe at Cupertino | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Pointe at Cupertino | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Pure Redmond      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 105    
Initial cost      
Land $ 7,461    
Buildings and improvements 31,363    
Costs capitalized subsequent to acquisition 3,593    
Gross amount carried at close of period      
Land and improvements 7,461    
Buildings and improvements 34,956    
Total 42,417    
Accumulated depreciation $ (6,539)    
Date of construction 2016    
Date acquired Dec-19    
Rental properties:      
Balance at the end of year $ 42,417    
Accumulated depreciation:      
Balance at the end of year $ 6,539    
Unencumbered Apartment Communities | Pure Redmond | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Pure Redmond | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Radius      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 264    
Initial cost      
Land $ 11,702    
Buildings and improvements 152,336    
Costs capitalized subsequent to acquisition 5,809    
Gross amount carried at close of period      
Land and improvements 11,702    
Buildings and improvements 158,145    
Total 169,847    
Accumulated depreciation $ (60,239)    
Date of construction 2015    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 169,847    
Accumulated depreciation:      
Balance at the end of year $ 60,239    
Unencumbered Apartment Communities | Radius | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Radius | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Reed Square      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 100    
Initial cost      
Land $ 6,873    
Buildings and improvements 16,037    
Costs capitalized subsequent to acquisition 9,631    
Gross amount carried at close of period      
Land and improvements 6,873    
Buildings and improvements 25,668    
Total 32,541    
Accumulated depreciation $ (15,675)    
Date of construction 1970    
Date acquired Jan-12    
Rental properties:      
Balance at the end of year $ 32,541    
Accumulated depreciation:      
Balance at the end of year $ 15,675    
Unencumbered Apartment Communities | Reed Square | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Reed Square | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Regency at Encino      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 75    
Initial cost      
Land $ 3,184    
Buildings and improvements 12,737    
Costs capitalized subsequent to acquisition 6,233    
Gross amount carried at close of period      
Land and improvements 3,184    
Buildings and improvements 18,970    
Total 22,154    
Accumulated depreciation $ (10,764)    
Date of construction 1989    
Date acquired Dec-09    
Rental properties:      
Balance at the end of year $ 22,154    
Accumulated depreciation:      
Balance at the end of year $ 10,764    
Unencumbered Apartment Communities | Regency at Encino | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Regency at Encino | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Regency Palm Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 116    
Initial cost      
Land $ 7,763    
Buildings and improvements 28,019    
Costs capitalized subsequent to acquisition 1,915    
Gross amount carried at close of period      
Land and improvements 7,763    
Buildings and improvements 29,934    
Total 37,697    
Accumulated depreciation $ (2,778)    
Date of construction 1987    
Date acquired Jul-22    
Rental properties:      
Balance at the end of year $ 37,697    
Accumulated depreciation:      
Balance at the end of year $ 2,778    
Unencumbered Apartment Communities | Renaissance at Uptown Orange      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 460    
Initial cost      
Land $ 27,870    
Buildings and improvements 111,482    
Costs capitalized subsequent to acquisition 12,929    
Gross amount carried at close of period      
Land and improvements 27,870    
Buildings and improvements 124,411    
Total 152,281    
Accumulated depreciation $ (48,860)    
Date of construction 2007    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 152,281    
Accumulated depreciation:      
Balance at the end of year $ 48,860    
Unencumbered Apartment Communities | Renaissance at Uptown Orange | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Renaissance at Uptown Orange | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Reveal      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 438    
Initial cost      
Land $ 25,073    
Buildings and improvements 121,314    
Costs capitalized subsequent to acquisition 9,109    
Gross amount carried at close of period      
Land and improvements 25,073    
Buildings and improvements 130,423    
Total 155,496    
Accumulated depreciation $ (47,465)    
Date of construction 2010    
Date acquired Apr-15    
Rental properties:      
Balance at the end of year $ 155,496    
Accumulated depreciation:      
Balance at the end of year $ 47,465    
Unencumbered Apartment Communities | Reveal | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Reveal | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Salmon Run at Perry Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 132    
Initial cost      
Land $ 3,717    
Buildings and improvements 11,483    
Costs capitalized subsequent to acquisition 5,361    
Gross amount carried at close of period      
Land and improvements 3,801    
Buildings and improvements 16,760    
Total 20,561    
Accumulated depreciation $ (12,345)    
Date of construction 2000    
Date acquired Oct-00    
Rental properties:      
Balance at the end of year $ 20,561    
Accumulated depreciation:      
Balance at the end of year $ 12,345    
Unencumbered Apartment Communities | Salmon Run at Perry Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Salmon Run at Perry Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Sammamish View      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 153    
Initial cost      
Land $ 3,324    
Buildings and improvements 7,501    
Costs capitalized subsequent to acquisition 9,619    
Gross amount carried at close of period      
Land and improvements 3,331    
Buildings and improvements 17,113    
Total 20,444    
Accumulated depreciation $ (15,341)    
Date of construction 1986    
Date acquired Nov-94    
Rental properties:      
Balance at the end of year $ 20,444    
Accumulated depreciation:      
Balance at the end of year $ 15,341    
Unencumbered Apartment Communities | Sammamish View | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Sammamish View | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | 101 San Fernando      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 323    
Initial cost      
Land $ 4,173    
Buildings and improvements 58,961    
Costs capitalized subsequent to acquisition 21,977    
Gross amount carried at close of period      
Land and improvements 4,173    
Buildings and improvements 80,938    
Total 85,111    
Accumulated depreciation $ (43,538)    
Date of construction 2001    
Date acquired Jul-10    
Rental properties:      
Balance at the end of year $ 85,111    
Accumulated depreciation:      
Balance at the end of year $ 43,538    
Unencumbered Apartment Communities | 101 San Fernando | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | 101 San Fernando | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | San Marcos      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 432    
Initial cost      
Land $ 15,563    
Buildings and improvements 36,204    
Costs capitalized subsequent to acquisition 42,181    
Gross amount carried at close of period      
Land and improvements 22,866    
Buildings and improvements 71,082    
Total 93,948    
Accumulated depreciation $ (49,007)    
Date of construction 2003    
Date acquired Nov-03    
Rental properties:      
Balance at the end of year $ 93,948    
Accumulated depreciation:      
Balance at the end of year $ 49,007    
Unencumbered Apartment Communities | San Marcos | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | San Marcos | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Santee Court/Santee Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 238    
Initial cost      
Land $ 9,581    
Buildings and improvements 40,317    
Costs capitalized subsequent to acquisition 19,772    
Gross amount carried at close of period      
Land and improvements 9,582    
Buildings and improvements 60,088    
Total 69,670    
Accumulated depreciation $ (31,764)    
Date of construction 2004    
Date acquired Oct-10    
Rental properties:      
Balance at the end of year $ 69,670    
Accumulated depreciation:      
Balance at the end of year $ 31,764    
Unencumbered Apartment Communities | Santee Court/Santee Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Santee Court/Santee Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Shadow Point      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 172    
Initial cost      
Land $ 2,812    
Buildings and improvements 11,170    
Costs capitalized subsequent to acquisition 8,776    
Gross amount carried at close of period      
Land and improvements 2,820    
Buildings and improvements 19,938    
Total 22,758    
Accumulated depreciation $ (13,582)    
Date of construction 1983    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 22,758    
Accumulated depreciation:      
Balance at the end of year $ 13,582    
Unencumbered Apartment Communities | Shadow Point | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Shadow Point | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Shadowbrook      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 418    
Initial cost      
Land $ 19,292    
Buildings and improvements 77,168    
Costs capitalized subsequent to acquisition 13,470    
Gross amount carried at close of period      
Land and improvements 19,292    
Buildings and improvements 90,638    
Total 109,930    
Accumulated depreciation $ (35,986)    
Date of construction 1986    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 109,930    
Accumulated depreciation:      
Balance at the end of year $ 35,986    
Unencumbered Apartment Communities | Shadowbrook | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Shadowbrook | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Skye at Bunker Hill      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 456    
Initial cost      
Land $ 11,498    
Buildings and improvements 27,871    
Costs capitalized subsequent to acquisition 107,120    
Gross amount carried at close of period      
Land and improvements 11,639    
Buildings and improvements 134,850    
Total 146,489    
Accumulated depreciation $ (115,795)    
Date of construction 1968    
Date acquired Mar-98    
Rental properties:      
Balance at the end of year $ 146,489    
Accumulated depreciation:      
Balance at the end of year $ 115,795    
Unencumbered Apartment Communities | Skye at Bunker Hill | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Skye at Bunker Hill | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Slater 116      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 108    
Initial cost      
Land $ 7,379    
Buildings and improvements 22,138    
Costs capitalized subsequent to acquisition 2,356    
Gross amount carried at close of period      
Land and improvements 7,379    
Buildings and improvements 24,494    
Total 31,873    
Accumulated depreciation $ (9,868)    
Date of construction 2013    
Date acquired Sep-13    
Rental properties:      
Balance at the end of year $ 31,873    
Accumulated depreciation:      
Balance at the end of year $ 9,868    
Unencumbered Apartment Communities | Slater 116 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Slater 116 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Solstice      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 280    
Initial cost      
Land $ 34,444    
Buildings and improvements 147,262    
Costs capitalized subsequent to acquisition 10,015    
Gross amount carried at close of period      
Land and improvements 34,444    
Buildings and improvements 157,277    
Total 191,721    
Accumulated depreciation $ (63,133)    
Date of construction 2014    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 191,721    
Accumulated depreciation:      
Balance at the end of year $ 63,133    
Unencumbered Apartment Communities | Solstice | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Solstice | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Station Park Green      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 599    
Initial cost      
Land $ 54,782    
Buildings and improvements 314,694    
Costs capitalized subsequent to acquisition 113,516    
Gross amount carried at close of period      
Land and improvements 67,204    
Buildings and improvements 415,788    
Total 482,992    
Accumulated depreciation $ (100,714)    
Date of construction 2018    
Date acquired Mar-18    
Rental properties:      
Balance at the end of year $ 482,992    
Accumulated depreciation:      
Balance at the end of year $ 100,714    
Unencumbered Apartment Communities | Station Park Green | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Station Park Green | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Stevenson Place      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 200    
Initial cost      
Land $ 996    
Buildings and improvements 5,582    
Costs capitalized subsequent to acquisition 16,572    
Gross amount carried at close of period      
Land and improvements 1,001    
Buildings and improvements 22,149    
Total 23,150    
Accumulated depreciation $ (19,530)    
Date of construction 1975    
Date acquired Apr-00    
Rental properties:      
Balance at the end of year $ 23,150    
Accumulated depreciation:      
Balance at the end of year $ 19,530    
Unencumbered Apartment Communities | Stevenson Place | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Stevenson Place | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Stonehedge Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 196    
Initial cost      
Land $ 3,167    
Buildings and improvements 12,603    
Costs capitalized subsequent to acquisition 13,031    
Gross amount carried at close of period      
Land and improvements 3,201    
Buildings and improvements 25,600    
Total 28,801    
Accumulated depreciation $ (21,210)    
Date of construction 1986    
Date acquired Oct-97    
Rental properties:      
Balance at the end of year $ 28,801    
Accumulated depreciation:      
Balance at the end of year $ 21,210    
Unencumbered Apartment Communities | Stonehedge Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Stonehedge Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Summerhill Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 100    
Initial cost      
Land $ 2,654    
Buildings and improvements 4,918    
Costs capitalized subsequent to acquisition 12,020    
Gross amount carried at close of period      
Land and improvements 2,656    
Buildings and improvements 16,936    
Total 19,592    
Accumulated depreciation $ (15,844)    
Date of construction 1988    
Date acquired Sep-88    
Rental properties:      
Balance at the end of year $ 19,592    
Accumulated depreciation:      
Balance at the end of year $ 15,844    
Unencumbered Apartment Communities | Summerhill Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Summerhill Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Summit Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 300    
Initial cost      
Land $ 5,959    
Buildings and improvements 23,670    
Costs capitalized subsequent to acquisition 12,974    
Gross amount carried at close of period      
Land and improvements 5,977    
Buildings and improvements 36,626    
Total 42,603    
Accumulated depreciation $ (26,132)    
Date of construction 1972    
Date acquired Dec-02    
Rental properties:      
Balance at the end of year $ 42,603    
Accumulated depreciation:      
Balance at the end of year $ 26,132    
Unencumbered Apartment Communities | Summit Park | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Summit Park | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Taylor 28      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 197    
Initial cost      
Land $ 13,915    
Buildings and improvements 57,700    
Costs capitalized subsequent to acquisition 6,398    
Gross amount carried at close of period      
Land and improvements 13,915    
Buildings and improvements 64,098    
Total 78,013    
Accumulated depreciation $ (25,441)    
Date of construction 2008    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 78,013    
Accumulated depreciation:      
Balance at the end of year $ 25,441    
Unencumbered Apartment Communities | Taylor 28 | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Taylor 28 | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Audrey at Belltown      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 137    
Initial cost      
Land $ 9,228    
Buildings and improvements 36,911    
Costs capitalized subsequent to acquisition 3,479    
Gross amount carried at close of period      
Land and improvements 9,228    
Buildings and improvements 40,390    
Total 49,618    
Accumulated depreciation $ (15,811)    
Date of construction 1992    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 49,618    
Accumulated depreciation:      
Balance at the end of year $ 15,811    
Unencumbered Apartment Communities | The Audrey at Belltown | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | The Audrey at Belltown | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Avery      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 121    
Initial cost      
Land $ 6,964    
Buildings and improvements 29,922    
Costs capitalized subsequent to acquisition 2,556    
Gross amount carried at close of period      
Land and improvements 6,964    
Buildings and improvements 32,478    
Total 39,442    
Accumulated depreciation $ (11,881)    
Date of construction 2014    
Date acquired Mar-14    
Rental properties:      
Balance at the end of year $ 39,442    
Accumulated depreciation:      
Balance at the end of year $ 11,881    
Unencumbered Apartment Communities | The Avery | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Avery | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Bernard      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 63    
Initial cost      
Land $ 3,699    
Buildings and improvements 11,345    
Costs capitalized subsequent to acquisition 1,259    
Gross amount carried at close of period      
Land and improvements 3,689    
Buildings and improvements 12,614    
Total 16,303    
Accumulated depreciation $ (5,995)    
Date of construction 2008    
Date acquired Sep-11    
Rental properties:      
Balance at the end of year $ 16,303    
Accumulated depreciation:      
Balance at the end of year $ 5,995    
Unencumbered Apartment Communities | The Bernard | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Bernard | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Blake LA      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 196    
Initial cost      
Land $ 4,023    
Buildings and improvements 9,527    
Costs capitalized subsequent to acquisition 26,285    
Gross amount carried at close of period      
Land and improvements 4,031    
Buildings and improvements 35,804    
Total 39,835    
Accumulated depreciation $ (29,543)    
Date of construction 1979    
Date acquired Jun-97    
Rental properties:      
Balance at the end of year $ 39,835    
Accumulated depreciation:      
Balance at the end of year $ 29,543    
Unencumbered Apartment Communities | The Blake LA | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Blake LA | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Cairns      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 99    
Initial cost      
Land $ 6,937    
Buildings and improvements 20,679    
Costs capitalized subsequent to acquisition 3,934    
Gross amount carried at close of period      
Land and improvements 6,939    
Buildings and improvements 24,611    
Total 31,550    
Accumulated depreciation $ (14,834)    
Date of construction 2006    
Date acquired Jun-07    
Rental properties:      
Balance at the end of year $ 31,550    
Accumulated depreciation:      
Balance at the end of year $ 14,834    
Unencumbered Apartment Communities | The Cairns | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Cairns | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Elliot at Mukilteo      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 301    
Initial cost      
Land $ 2,498    
Buildings and improvements 10,595    
Costs capitalized subsequent to acquisition 21,212    
Gross amount carried at close of period      
Land and improvements 2,824    
Buildings and improvements 31,481    
Total 34,305    
Accumulated depreciation $ (27,582)    
Date of construction 1981    
Date acquired Jan-97    
Rental properties:      
Balance at the end of year $ 34,305    
Accumulated depreciation:      
Balance at the end of year $ 27,582    
Unencumbered Apartment Communities | The Elliot at Mukilteo | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Elliot at Mukilteo | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Grand      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 243    
Initial cost      
Land $ 4,531    
Buildings and improvements 89,208    
Costs capitalized subsequent to acquisition 9,975    
Gross amount carried at close of period      
Land and improvements 4,531    
Buildings and improvements 99,183    
Total 103,714    
Accumulated depreciation $ (54,725)    
Date of construction 2009    
Date acquired Jan-09    
Rental properties:      
Balance at the end of year $ 103,714    
Accumulated depreciation:      
Balance at the end of year $ 54,725    
Unencumbered Apartment Communities | The Grand | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Grand | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Hallie      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 292    
Initial cost      
Land $ 2,202    
Buildings and improvements 4,794    
Costs capitalized subsequent to acquisition 58,528    
Gross amount carried at close of period      
Land and improvements 8,385    
Buildings and improvements 57,139    
Total 65,524    
Accumulated depreciation $ (50,894)    
Date of construction 1972    
Date acquired Apr-97    
Rental properties:      
Balance at the end of year $ 65,524    
Accumulated depreciation:      
Balance at the end of year $ 50,894    
Unencumbered Apartment Communities | The Hallie | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Hallie | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Havens      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 440    
Initial cost      
Land $ 26,138    
Buildings and improvements 137,933    
Costs capitalized subsequent to acquisition 1,180    
Gross amount carried at close of period      
Land and improvements 26,138    
Buildings and improvements 139,113    
Total 165,251    
Accumulated depreciation $ (3,795)    
Date of construction 1969    
Date acquired Mar-24    
Rental properties:      
Balance at the end of year $ 165,251    
Accumulated depreciation:      
Balance at the end of year $ 3,795    
Unencumbered Apartment Communities | The Havens | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Havens | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Huntington      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 276    
Initial cost      
Land $ 10,374    
Buildings and improvements 41,495    
Costs capitalized subsequent to acquisition 10,171    
Gross amount carried at close of period      
Land and improvements 10,374    
Buildings and improvements 51,666    
Total 62,040    
Accumulated depreciation $ (24,482)    
Date of construction 1975    
Date acquired Jun-12    
Rental properties:      
Balance at the end of year $ 62,040    
Accumulated depreciation:      
Balance at the end of year $ 24,482    
Unencumbered Apartment Communities | The Huntington | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Huntington | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Landing at Jack London Square      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 282    
Initial cost      
Land $ 33,554    
Buildings and improvements 78,292    
Costs capitalized subsequent to acquisition 11,428    
Gross amount carried at close of period      
Land and improvements 33,554    
Buildings and improvements 89,720    
Total 123,274    
Accumulated depreciation $ (37,007)    
Date of construction 2001    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 123,274    
Accumulated depreciation:      
Balance at the end of year $ 37,007    
Unencumbered Apartment Communities | The Landing at Jack London Square | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | The Landing at Jack London Square | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Lofts at Pinehurst      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 118    
Initial cost      
Land $ 1,570    
Buildings and improvements 3,912    
Costs capitalized subsequent to acquisition 6,896    
Gross amount carried at close of period      
Land and improvements 1,618    
Buildings and improvements 10,760    
Total 12,378    
Accumulated depreciation $ (8,497)    
Date of construction 1971    
Date acquired Jun-97    
Rental properties:      
Balance at the end of year $ 12,378    
Accumulated depreciation:      
Balance at the end of year $ 8,497    
Unencumbered Apartment Communities | The Lofts at Pinehurst | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Lofts at Pinehurst | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Palisades      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 192    
Initial cost      
Land $ 1,560    
Buildings and improvements 6,242    
Costs capitalized subsequent to acquisition 17,314    
Gross amount carried at close of period      
Land and improvements 1,565    
Buildings and improvements 23,551    
Total 25,116    
Accumulated depreciation $ (20,615)    
Date of construction 1977    
Date acquired May-90    
Rental properties:      
Balance at the end of year $ 25,116    
Accumulated depreciation:      
Balance at the end of year $ 20,615    
Unencumbered Apartment Communities | The Palisades | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Palisades | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Palms at Laguna Niguel      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 460    
Initial cost      
Land $ 23,584    
Buildings and improvements 94,334    
Costs capitalized subsequent to acquisition 18,881    
Gross amount carried at close of period      
Land and improvements 23,584    
Buildings and improvements 113,215    
Total 136,799    
Accumulated depreciation $ (46,948)    
Date of construction 1988    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 136,799    
Accumulated depreciation:      
Balance at the end of year $ 46,948    
Unencumbered Apartment Communities | The Palms at Laguna Niguel | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | The Palms at Laguna Niguel | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Stuart      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 188    
Initial cost      
Land $ 13,574    
Buildings and improvements 54,298    
Costs capitalized subsequent to acquisition 6,105    
Gross amount carried at close of period      
Land and improvements 13,574    
Buildings and improvements 60,403    
Total 73,977    
Accumulated depreciation $ (23,692)    
Date of construction 2007    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 73,977    
Accumulated depreciation:      
Balance at the end of year $ 23,692    
Unencumbered Apartment Communities | The Stuart | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | The Stuart | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Trails of Redmond      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 423    
Initial cost      
Land $ 21,930    
Buildings and improvements 87,720    
Costs capitalized subsequent to acquisition 10,906    
Gross amount carried at close of period      
Land and improvements 21,930    
Buildings and improvements 98,626    
Total 120,556    
Accumulated depreciation $ (39,541)    
Date of construction 1985    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 120,556    
Accumulated depreciation:      
Balance at the end of year $ 39,541    
Unencumbered Apartment Communities | The Trails of Redmond | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | The Trails of Redmond | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | The Village at Toluca Lake      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 146    
Initial cost      
Land $ 14,634    
Buildings and improvements 48,297    
Costs capitalized subsequent to acquisition 2,707    
Gross amount carried at close of period      
Land and improvements 14,634    
Buildings and improvements 51,004    
Total 65,638    
Accumulated depreciation $ (6,649)    
Date of construction 1974    
Date acquired Jun-21    
Rental properties:      
Balance at the end of year $ 65,638    
Accumulated depreciation:      
Balance at the end of year $ 6,649    
Unencumbered Apartment Communities | The Village at Toluca Lake | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | The Village at Toluca Lake | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Tierra Vista      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 404    
Initial cost      
Land $ 13,652    
Buildings and improvements 53,336    
Costs capitalized subsequent to acquisition 13,304    
Gross amount carried at close of period      
Land and improvements 13,661    
Buildings and improvements 66,631    
Total 80,292    
Accumulated depreciation $ (45,036)    
Date of construction 2001    
Date acquired Jan-01    
Rental properties:      
Balance at the end of year $ 80,292    
Accumulated depreciation:      
Balance at the end of year $ 45,036    
Unencumbered Apartment Communities | Tierra Vista | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Tierra Vista | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Tiffany Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 101    
Initial cost      
Land $ 6,949    
Buildings and improvements 27,796    
Costs capitalized subsequent to acquisition 3,858    
Gross amount carried at close of period      
Land and improvements 6,949    
Buildings and improvements 31,654    
Total 38,603    
Accumulated depreciation $ (12,494)    
Date of construction 1987    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 38,603    
Accumulated depreciation:      
Balance at the end of year $ 12,494    
Unencumbered Apartment Communities | Tiffany Court | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Tiffany Court | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Trabuco Villas      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 132    
Initial cost      
Land $ 3,638    
Buildings and improvements 8,640    
Costs capitalized subsequent to acquisition 7,340    
Gross amount carried at close of period      
Land and improvements 3,890    
Buildings and improvements 15,728    
Total 19,618    
Accumulated depreciation $ (12,111)    
Date of construction 1985    
Date acquired Oct-97    
Rental properties:      
Balance at the end of year $ 19,618    
Accumulated depreciation:      
Balance at the end of year $ 12,111    
Unencumbered Apartment Communities | Trabuco Villas | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Trabuco Villas | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Valley Park      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 160    
Initial cost      
Land $ 3,361    
Buildings and improvements 13,420    
Costs capitalized subsequent to acquisition 8,761    
Gross amount carried at close of period      
Land and improvements 3,761    
Buildings and improvements 21,781    
Total 25,542    
Accumulated depreciation $ (16,169)    
Date of construction 1969    
Date acquired Nov-01    
Rental properties:      
Balance at the end of year $ 25,542    
Accumulated depreciation:      
Balance at the end of year $ 16,169    
Unencumbered Apartment Communities | Via      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 284    
Initial cost      
Land $ 22,000    
Buildings and improvements 82,270    
Costs capitalized subsequent to acquisition 8,331    
Gross amount carried at close of period      
Land and improvements 22,016    
Buildings and improvements 90,585    
Total 112,601    
Accumulated depreciation $ (43,846)    
Date of construction 2011    
Date acquired Jul-11    
Rental properties:      
Balance at the end of year $ 112,601    
Accumulated depreciation:      
Balance at the end of year $ 43,846    
Unencumbered Apartment Communities | Via | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Via | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Villa Angelina      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 256    
Initial cost      
Land $ 4,498    
Buildings and improvements 17,962    
Costs capitalized subsequent to acquisition 10,982    
Gross amount carried at close of period      
Land and improvements 4,962    
Buildings and improvements 28,480    
Total 33,442    
Accumulated depreciation $ (21,505)    
Date of construction 1970    
Date acquired Nov-01    
Rental properties:      
Balance at the end of year $ 33,442    
Accumulated depreciation:      
Balance at the end of year $ 21,505    
Unencumbered Apartment Communities | Villa Granada      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 270    
Initial cost      
Land $ 38,299    
Buildings and improvements 89,365    
Costs capitalized subsequent to acquisition 5,290    
Gross amount carried at close of period      
Land and improvements 38,299    
Buildings and improvements 94,655    
Total 132,954    
Accumulated depreciation $ (36,131)    
Date of construction 2010    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 132,954    
Accumulated depreciation:      
Balance at the end of year $ 36,131    
Unencumbered Apartment Communities | Villa Granada | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Villa Granada | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Villa Siena      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 274    
Initial cost      
Land $ 13,842    
Buildings and improvements 55,367    
Costs capitalized subsequent to acquisition 18,292    
Gross amount carried at close of period      
Land and improvements 13,842    
Buildings and improvements 73,659    
Total 87,501    
Accumulated depreciation $ (30,803)    
Date of construction 1974    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 87,501    
Accumulated depreciation:      
Balance at the end of year $ 30,803    
Unencumbered Apartment Communities | Villa Siena | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Villa Siena | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Village Green      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 272    
Initial cost      
Land $ 6,488    
Buildings and improvements 36,768    
Costs capitalized subsequent to acquisition 7,732    
Gross amount carried at close of period      
Land and improvements 6,488    
Buildings and improvements 44,500    
Total 50,988    
Accumulated depreciation $ (18,280)    
Date of construction 1971    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 50,988    
Accumulated depreciation:      
Balance at the end of year $ 18,280    
Unencumbered Apartment Communities | Village Green | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Village Green | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Vista Belvedere      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 76    
Initial cost      
Land $ 5,573    
Buildings and improvements 11,901    
Costs capitalized subsequent to acquisition 11,193    
Gross amount carried at close of period      
Land and improvements 5,573    
Buildings and improvements 23,094    
Total 28,667    
Accumulated depreciation $ (16,903)    
Date of construction 1963    
Date acquired Aug-04    
Rental properties:      
Balance at the end of year $ 28,667    
Accumulated depreciation:      
Balance at the end of year $ 16,903    
Unencumbered Apartment Communities | Vista Belvedere | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Vista Belvedere | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Vox      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 58    
Initial cost      
Land $ 5,545    
Buildings and improvements 16,635    
Costs capitalized subsequent to acquisition 1,126    
Gross amount carried at close of period      
Land and improvements 5,545    
Buildings and improvements 17,761    
Total 23,306    
Accumulated depreciation $ (6,693)    
Date of construction 2013    
Date acquired Oct-13    
Rental properties:      
Balance at the end of year $ 23,306    
Accumulated depreciation:      
Balance at the end of year $ 6,693    
Unencumbered Apartment Communities | Vox | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Vox | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Wallace on Sunset      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 200    
Initial cost      
Land $ 24,005    
Buildings and improvements 80,466    
Costs capitalized subsequent to acquisition 4,988    
Gross amount carried at close of period      
Land and improvements 24,005    
Buildings and improvements 85,454    
Total 109,459    
Accumulated depreciation $ (24,171)    
Date of construction 2021    
Date acquired Dec-21    
Rental properties:      
Balance at the end of year $ 109,459    
Accumulated depreciation:      
Balance at the end of year $ 24,171    
Unencumbered Apartment Communities | Wallace on Sunset | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Wallace on Sunset | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Walnut Heights      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 163    
Initial cost      
Land $ 4,858    
Buildings and improvements 19,168    
Costs capitalized subsequent to acquisition 7,839    
Gross amount carried at close of period      
Land and improvements 4,887    
Buildings and improvements 26,978    
Total 31,865    
Accumulated depreciation $ (19,322)    
Date of construction 1964    
Date acquired Oct-03    
Rental properties:      
Balance at the end of year $ 31,865    
Accumulated depreciation:      
Balance at the end of year $ 19,322    
Unencumbered Apartment Communities | Walnut Heights | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Walnut Heights | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Wandering Creek      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 156    
Initial cost      
Land $ 1,285    
Buildings and improvements 4,980    
Costs capitalized subsequent to acquisition 7,084    
Gross amount carried at close of period      
Land and improvements 1,296    
Buildings and improvements 12,053    
Total 13,349    
Accumulated depreciation $ (10,422)    
Date of construction 1986    
Date acquired Nov-95    
Rental properties:      
Balance at the end of year $ 13,349    
Accumulated depreciation:      
Balance at the end of year $ 10,422    
Unencumbered Apartment Communities | Wandering Creek | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Wandering Creek | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Waterford Place      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 238    
Initial cost      
Land $ 11,808    
Buildings and improvements 24,500    
Costs capitalized subsequent to acquisition 20,387    
Gross amount carried at close of period      
Land and improvements 15,165    
Buildings and improvements 41,530    
Total 56,695    
Accumulated depreciation $ (33,077)    
Date of construction 2000    
Date acquired Jun-00    
Rental properties:      
Balance at the end of year $ 56,695    
Accumulated depreciation:      
Balance at the end of year $ 33,077    
Unencumbered Apartment Communities | Waterford Place | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Waterford Place | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Wharfside Pointe      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 155    
Initial cost      
Land $ 2,245    
Buildings and improvements 7,020    
Costs capitalized subsequent to acquisition 14,645    
Gross amount carried at close of period      
Land and improvements 2,258    
Buildings and improvements 21,652    
Total 23,910    
Accumulated depreciation $ (19,644)    
Date of construction 1990    
Date acquired Jun-94    
Rental properties:      
Balance at the end of year $ 23,910    
Accumulated depreciation:      
Balance at the end of year $ 19,644    
Unencumbered Apartment Communities | Wharfside Pointe | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Wharfside Pointe | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Willow Lake      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 508    
Initial cost      
Land $ 43,194    
Buildings and improvements 101,030    
Costs capitalized subsequent to acquisition 22,930    
Gross amount carried at close of period      
Land and improvements 43,194    
Buildings and improvements 123,960    
Total 167,154    
Accumulated depreciation $ (58,677)    
Date of construction 1989    
Date acquired Oct-12    
Rental properties:      
Balance at the end of year $ 167,154    
Accumulated depreciation:      
Balance at the end of year $ 58,677    
Unencumbered Apartment Communities | Willow Lake | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Willow Lake | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | 5600 Wilshire      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 284    
Initial cost      
Land $ 30,535    
Buildings and improvements 91,604    
Costs capitalized subsequent to acquisition 11,585    
Gross amount carried at close of period      
Land and improvements 30,535    
Buildings and improvements 103,189    
Total 133,724    
Accumulated depreciation $ (39,637)    
Date of construction 2008    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 133,724    
Accumulated depreciation:      
Balance at the end of year $ 39,637    
Unencumbered Apartment Communities | 5600 Wilshire | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | 5600 Wilshire | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Wilshire La Brea      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 478    
Initial cost      
Land $ 56,932    
Buildings and improvements 211,998    
Costs capitalized subsequent to acquisition 24,184    
Gross amount carried at close of period      
Land and improvements 56,932    
Buildings and improvements 236,182    
Total 293,114    
Accumulated depreciation $ (93,087)    
Date of construction 2014    
Date acquired Apr-14    
Rental properties:      
Balance at the end of year $ 293,114    
Accumulated depreciation:      
Balance at the end of year $ 93,087    
Unencumbered Apartment Communities | Wilshire La Brea | Minimum      
Gross amount carried at close of period      
Life used for depreciation 5 years    
Unencumbered Apartment Communities | Wilshire La Brea | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Wilshire Promenade      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 149    
Initial cost      
Land $ 3,118    
Buildings and improvements 7,385    
Costs capitalized subsequent to acquisition 16,539    
Gross amount carried at close of period      
Land and improvements 3,797    
Buildings and improvements 23,245    
Total 27,042    
Accumulated depreciation $ (18,348)    
Date of construction 1992    
Date acquired Jan-97    
Rental properties:      
Balance at the end of year $ 27,042    
Accumulated depreciation:      
Balance at the end of year $ 18,348    
Unencumbered Apartment Communities | Wilshire Promenade | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Wilshire Promenade | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Windsor Court      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 95    
Initial cost      
Land $ 6,383    
Buildings and improvements 23,420    
Costs capitalized subsequent to acquisition 1,325    
Gross amount carried at close of period      
Land and improvements 6,383    
Buildings and improvements 24,745    
Total 31,128    
Accumulated depreciation $ (2,259)    
Date of construction 1987    
Date acquired Jul-22    
Rental properties:      
Balance at the end of year $ 31,128    
Accumulated depreciation:      
Balance at the end of year $ 2,259    
Unencumbered Apartment Communities | Windsor Ridge      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 216    
Initial cost      
Land $ 4,017    
Buildings and improvements 10,315    
Costs capitalized subsequent to acquisition 18,459    
Gross amount carried at close of period      
Land and improvements 4,021    
Buildings and improvements 28,770    
Total 32,791    
Accumulated depreciation $ (27,636)    
Date of construction 1989    
Date acquired Mar-89    
Rental properties:      
Balance at the end of year $ 32,791    
Accumulated depreciation:      
Balance at the end of year $ 27,636    
Unencumbered Apartment Communities | Windsor Ridge | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Windsor Ridge | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Woodland Commons      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 302    
Initial cost      
Land $ 2,040    
Buildings and improvements 8,727    
Costs capitalized subsequent to acquisition 28,565    
Gross amount carried at close of period      
Land and improvements 2,044    
Buildings and improvements 37,288    
Total 39,332    
Accumulated depreciation $ (29,242)    
Date of construction 1978    
Date acquired Mar-90    
Rental properties:      
Balance at the end of year $ 39,332    
Accumulated depreciation:      
Balance at the end of year $ 29,242    
Unencumbered Apartment Communities | Woodland Commons | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Woodland Commons | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Unencumbered Apartment Communities | Woodside Village      
Real Estate and Accumulated Depreciation [Line Items]      
Apartment Homes | apartment 145    
Initial cost      
Land $ 5,331    
Buildings and improvements 21,036    
Costs capitalized subsequent to acquisition 8,042    
Gross amount carried at close of period      
Land and improvements 5,341    
Buildings and improvements 29,068    
Total 34,409    
Accumulated depreciation $ (19,683)    
Date of construction 1987    
Date acquired Dec-04    
Rental properties:      
Balance at the end of year $ 34,409    
Accumulated depreciation:      
Balance at the end of year $ 19,683    
Unencumbered Apartment Communities | Woodside Village | Minimum      
Gross amount carried at close of period      
Life used for depreciation 3 years    
Unencumbered Apartment Communities | Woodside Village | Maximum      
Gross amount carried at close of period      
Life used for depreciation 30 years    
Other Property      
Real Estate and Accumulated Depreciation [Line Items]      
Encumbrance $ 0    
Initial cost      
Land 80,706    
Buildings and improvements 16,587    
Costs capitalized subsequent to acquisition 16,700    
Gross amount carried at close of period      
Land and improvements 82,067    
Buildings and improvements 31,926    
Total 113,993    
Accumulated depreciation (23,294)    
Rental properties:      
Balance at the end of year 113,993    
Accumulated depreciation:      
Balance at the end of year 23,294    
Other Property | Other real estate assets      
Real Estate and Accumulated Depreciation [Line Items]      
Encumbrance 0    
Initial cost      
Land 80,706    
Buildings and improvements 16,587    
Costs capitalized subsequent to acquisition 16,700    
Gross amount carried at close of period      
Land and improvements 82,067    
Buildings and improvements 31,926    
Total 113,993    
Accumulated depreciation (23,294)    
Rental properties:      
Balance at the end of year 113,993    
Accumulated depreciation:      
Balance at the end of year 23,294    
Real Estate Rental Property      
Gross amount carried at close of period      
Total 17,589,518 16,135,223 15,966,227
Rental properties:      
Balance at beginning of year 16,135,223 15,966,227 15,629,927
Balance at the end of year $ 17,589,518 $ 16,135,223 $ 15,966,227