SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2018	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016	Dec. 31, 2018	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					$ 445,974
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					138,243
Buildings & Improvements					1,292,639
Costs capitalized subsequent to acquisition					202,055
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					161,965
Buildings & Improvements					1,470,972
Total	$ 1,632,937				1,632,937
Accumulated Depreciation	(311,324)	$ (255,599)	$ (237,859)	$ (212,826)	(353,871)	$ (311,324)	$ (255,599)	$ (237,859)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Write down of asset and accumulated depreciation on impaired assets	0	(8,597)	(7,144)	0
Other	0	(74)	0	0
Balance at close of year	1,632,937
Total real estate investments					1,289,476	1,380,245	1,121,385
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance at beginning of year	311,324	255,599	237,859	212,826
Additions during year [Abstract]
Provisions for depreciation	49,208	78,785	42,960	37,846
Deductions during year [Abstract]
Accumulated depreciation on real estate sold or classified as held for sale	(6,609)	(11,033)	(14,687)	(9,957)
Write down of asset and accumulated depreciation on impaired assets	0	(8,597)	(7,144)	0
Other	(52)	(3,430)	(3,389)	(2,856)
Balance at close of year	353,871	311,324	255,599	237,859
Net basis of real estate investments for federal income tax purposes					1,200,000	1,500,000	1,400,000	1,600,000
Unimproved Land
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					4,609
Buildings & Improvements					0
Costs capitalized subsequent to acquisition					692
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					5,301
Buildings & Improvements					0
Total	11,476	18,455	20,939	25,827	5,301	11,476	18,455	20,939
Accumulated Depreciation	0				0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	11,476	18,455	20,939	25,827
Improvements and Other	0	0	1,024	205
Cost of real estate sold	(4,954)	(1,000)	0	(442)
Impairment charge	(1,221)	(2,617)	(3,508)	(1,285)
Transfers	0	(3,288)	0	(1,632)
Development placed in service	0	0	0	(1,734)
Balance at close of year	5,301	11,476	18,455	20,939
Total real estate investments					1,279,066	1,369,916	1,121,385	1,204,654
Deductions during year [Abstract]
Balance at close of year	0
Unimproved Land | Creekside Crossing - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,357
Buildings & Improvements					0
Costs capitalized subsequent to acquisition					692
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					3,049
Buildings & Improvements					0
Total	3,049				3,049
Accumulated Depreciation	0				0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	3,049
Deductions during year [Abstract]
Balance at close of year	0
Unimproved Land | Minot 1525 24th Ave SW - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					506
Buildings & Improvements					0
Costs capitalized subsequent to acquisition					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					506
Buildings & Improvements					0
Total	506				506
Accumulated Depreciation	0				0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	506
Deductions during year [Abstract]
Balance at close of year	0
Unimproved Land | Rapid City - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,376
Buildings & Improvements					0
Costs capitalized subsequent to acquisition					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,376
Buildings & Improvements					0
Total	1,376				1,376
Accumulated Depreciation	0				0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	1,376
Deductions during year [Abstract]
Balance at close of year	0
Unimproved Land | Weston - Weston, WI
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					370
Buildings & Improvements					0
Costs capitalized subsequent to acquisition					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					370
Buildings & Improvements					0
Total	370				370
Accumulated Depreciation	0				0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	370
Deductions during year [Abstract]
Balance at close of year	0
Wholly Owned Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Total	1,669,764	1,358,529	1,369,893	1,090,362	1,627,636	1,669,764	1,358,529	1,369,893
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	1,669,764	1,358,529	1,369,893	1,090,362
Improvements and Other	11,620	15,065	34,761	31,007
Total Additions	1,681,384	1,742,926	1,466,219	1,406,449
Cost of real estate sold	(53,653)	(46,001)	(21,601)	(1,305)
Impairment charge	0	(15,192)	(51,401)	0
Write down of asset and accumulated depreciation on impaired assets	0	(8,597)	(7,144)	0
Transfers	0	0	(24,156)	(26,373)
Other	(95)	(3,372)	(3,388)	(8,878)
Balance at close of year	1,627,636	1,669,764	1,358,529	1,369,893
Deductions during year [Abstract]
Write down of asset and accumulated depreciation on impaired assets	0	(8,597)	(7,144)	0
Development in Progress
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Total	0	0	51,681	153,994	0	$ 0	$ 0	$ 51,681
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	0	0	51,681	153,994
Improvements and Other	0	0	7,762	48,109
Transfers	0	0	0	1,734
Development placed in service	0	0	(59,443)	(152,156)
Balance at close of year	0	$ 0	$ 0	51,681
Multi-Family Residential
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					445,974
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					130,603
Buildings & Improvements					1,260,439
Costs capitalized subsequent to acquisition					191,875
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					153,398
Buildings & Improvements					1,429,519
Total	1,582,917				1,582,917
Accumulated Depreciation	(340,081)				(340,081)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	1,582,917
Deductions during year [Abstract]
Balance at close of year	340,081
Multi-Family Residential | 71 France - Edina, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					55,554
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					4,721
Buildings & Improvements					61,762
Costs capitalized subsequent to acquisition					102
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					4,721
Buildings & Improvements					61,864
Total	66,585				66,585
Accumulated Depreciation	(7,861)				(7,861)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	66,585
Deductions during year [Abstract]
Balance at close of year	7,861
Multi-Family Residential | 71 France - Edina, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | 71 France - Edina, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Alps Park - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,543
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					287
Buildings & Improvements					5,551
Costs capitalized subsequent to acquisition					370
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					333
Buildings & Improvements					5,875
Total	6,208				6,208
Accumulated Depreciation	(1,084)				(1,084)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,208
Deductions during year [Abstract]
Balance at close of year	1,084
Multi-Family Residential | Alps Park - Rapid City, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Alps Park - Rapid City, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Arbors - S Sioux City, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,494
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					350
Buildings & Improvements					6,625
Costs capitalized subsequent to acquisition					2,530
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,055
Buildings & Improvements					8,450
Total	9,505				9,505
Accumulated Depreciation	(3,328)				(3,328)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,505
Deductions during year [Abstract]
Balance at close of year	3,328
Multi-Family Residential | Arbors - S Sioux City, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Arbors - S Sioux City, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Arcata - Golden Valley, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,088
Buildings & Improvements					31,036
Costs capitalized subsequent to acquisition					120
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,090
Buildings & Improvements					31,154
Total	33,244				33,244
Accumulated Depreciation	(5,281)				(5,281)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	33,244
Deductions during year [Abstract]
Balance at close of year	5,281
Multi-Family Residential | Arcata - Golden Valley, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Arcata - Golden Valley, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Ashland - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					5,115
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					741
Buildings & Improvements					7,569
Costs capitalized subsequent to acquisition					293
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					803
Buildings & Improvements					7,800
Total	8,603				8,603
Accumulated Depreciation	(1,704)				(1,704)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,603
Deductions during year [Abstract]
Balance at close of year	1,704
Multi-Family Residential | Ashland - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Ashland - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Avalon Cove - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,616
Buildings & Improvements					34,074
Costs capitalized subsequent to acquisition					437
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,726
Buildings & Improvements					34,401
Total	36,127				36,127
Accumulated Depreciation	(3,237)				(3,237)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	36,127
Deductions during year [Abstract]
Balance at close of year	3,237
Multi-Family Residential | Avalon Cove - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Avalon Cove - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Boulder Court - Eagan, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,067
Buildings & Improvements					5,498
Costs capitalized subsequent to acquisition					3,253
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,561
Buildings & Improvements					8,257
Total	9,818				9,818
Accumulated Depreciation	(3,613)				(3,613)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,818
Deductions during year [Abstract]
Balance at close of year	3,613
Multi-Family Residential | Boulder Court - Eagan, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Boulder Court - Eagan, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Brookfield Village - Topeka, KS
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					4,847
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					509
Buildings & Improvements					6,698
Costs capitalized subsequent to acquisition					2,008
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					926
Buildings & Improvements					8,289
Total	9,215				9,215
Accumulated Depreciation	(3,418)				(3,418)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,215
Deductions during year [Abstract]
Balance at close of year	3,418
Multi-Family Residential | Brookfield Village - Topeka, KS | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Brookfield Village - Topeka, KS | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Canyon Lake - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					2,636
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					305
Buildings & Improvements					3,958
Costs capitalized subsequent to acquisition					2,411
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					398
Buildings & Improvements					6,276
Total	6,674				6,674
Accumulated Depreciation	(2,794)				(2,794)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,674
Deductions during year [Abstract]
Balance at close of year	2,794
Multi-Family Residential | Canyon Lake - Rapid City, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Canyon Lake - Rapid City, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cardinal Point - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,600
Buildings & Improvements					33,400
Costs capitalized subsequent to acquisition					52
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,615
Buildings & Improvements					33,437
Total	35,052				35,052
Accumulated Depreciation	(700)				(700)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	35,052
Deductions during year [Abstract]
Balance at close of year	700
Multi-Family Residential | Cardinal Point - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cardinal Point - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cascade Shores - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					11,400
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,585
Buildings & Improvements					16,710
Costs capitalized subsequent to acquisition					88
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,586
Buildings & Improvements					16,797
Total	18,383				18,383
Accumulated Depreciation	(1,636)				(1,636)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	18,383
Deductions during year [Abstract]
Balance at close of year	1,636
Multi-Family Residential | Cascade Shores - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cascade Shores - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Castlerock - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					6,134
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					736
Buildings & Improvements					4,864
Costs capitalized subsequent to acquisition					2,459
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,022
Buildings & Improvements					7,037
Total	8,059				8,059
Accumulated Depreciation	(3,879)				(3,879)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,059
Deductions during year [Abstract]
Balance at close of year	3,879
Multi-Family Residential | Castlerock - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Castlerock - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Chateau - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					301
Buildings & Improvements					20,058
Costs capitalized subsequent to acquisition					940
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					326
Buildings & Improvements					20,973
Total	21,299				21,299
Accumulated Depreciation	(4,017)				(4,017)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	21,299
Deductions during year [Abstract]
Balance at close of year	4,017
Multi-Family Residential | Chateau - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Chateau - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cimarron Hills - Omaha, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					4,406
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					706
Buildings & Improvements					9,588
Costs capitalized subsequent to acquisition					4,891
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,588
Buildings & Improvements					13,597
Total	15,185				15,185
Accumulated Depreciation	(6,732)				(6,732)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	15,185
Deductions during year [Abstract]
Balance at close of year	6,732
Multi-Family Residential | Cimarron Hills - Omaha, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cimarron Hills - Omaha, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Colonial Villa - Burnsville, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,401
Buildings & Improvements					11,515
Costs capitalized subsequent to acquisition					9,418
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,946
Buildings & Improvements					20,388
Total	23,334				23,334
Accumulated Depreciation	(9,557)				(9,557)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	23,334
Deductions during year [Abstract]
Balance at close of year	9,557
Multi-Family Residential | Colonial Villa - Burnsville, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Colonial Villa - Burnsville, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Colony - Lincoln, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					12,251
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,515
Buildings & Improvements					15,730
Costs capitalized subsequent to acquisition					1,656
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,771
Buildings & Improvements					17,130
Total	18,901				18,901
Accumulated Depreciation	(3,826)				(3,826)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	18,901
Deductions during year [Abstract]
Balance at close of year	3,826
Multi-Family Residential | Colony - Lincoln, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Colony - Lincoln, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Commons at Southgate - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					25,655
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					5,945
Buildings & Improvements					47,512
Costs capitalized subsequent to acquisition					1,460
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					6,333
Buildings & Improvements					48,584
Total	54,917				54,917
Accumulated Depreciation	(8,764)				(8,764)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	54,917
Deductions during year [Abstract]
Balance at close of year	8,764
Multi-Family Residential | Commons at Southgate - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Commons at Southgate - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cottage West Twin Homes - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,338
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					968
Buildings & Improvements					3,762
Costs capitalized subsequent to acquisition					618
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,076
Buildings & Improvements					4,272
Total	5,348				5,348
Accumulated Depreciation	(943)				(943)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,348
Deductions during year [Abstract]
Balance at close of year	943
Multi-Family Residential | Cottage West Twin Homes - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cottage West Twin Homes - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cottonwood - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,056
Buildings & Improvements					17,372
Costs capitalized subsequent to acquisition					5,583
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,625
Buildings & Improvements					22,386
Total	24,011				24,011
Accumulated Depreciation	(10,152)				(10,152)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	24,011
Deductions during year [Abstract]
Balance at close of year	10,152
Multi-Family Residential | Cottonwood - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cottonwood - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Country Meadows - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					6,062
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					491
Buildings & Improvements					7,809
Costs capitalized subsequent to acquisition					1,789
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					575
Buildings & Improvements					9,514
Total	10,089				10,089
Accumulated Depreciation	(5,134)				(5,134)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	10,089
Deductions during year [Abstract]
Balance at close of year	5,134
Multi-Family Residential | Country Meadows - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Country Meadows - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Crestview - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,511
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					235
Buildings & Improvements					4,290
Costs capitalized subsequent to acquisition					2,301
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					607
Buildings & Improvements					6,219
Total	6,826				6,826
Accumulated Depreciation	(4,002)				(4,002)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,826
Deductions during year [Abstract]
Balance at close of year	4,002
Multi-Family Residential | Crestview - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Crestview - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Crown Colony - Topeka, KS
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,499
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					620
Buildings & Improvements					9,956
Costs capitalized subsequent to acquisition					3,949
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,207
Buildings & Improvements					13,318
Total	14,525				14,525
Accumulated Depreciation	(6,541)				(6,541)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	14,525
Deductions during year [Abstract]
Balance at close of year	6,541
Multi-Family Residential | Crown Colony - Topeka, KS | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Crown Colony - Topeka, KS | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Crystal Bay - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					433
Buildings & Improvements					11,425
Costs capitalized subsequent to acquisition					272
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					436
Buildings & Improvements					11,694
Total	12,130				12,130
Accumulated Depreciation	(1,078)				(1,078)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	12,130
Deductions during year [Abstract]
Balance at close of year	1,078
Multi-Family Residential | Crystal Bay - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Crystal Bay - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Cypress Court - St. Cloud, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					12,217
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,583
Buildings & Improvements					18,879
Costs capitalized subsequent to acquisition					252
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,612
Buildings & Improvements					19,102
Total	20,714				20,714
Accumulated Depreciation	(3,508)				(3,508)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	20,714
Deductions during year [Abstract]
Balance at close of year	3,508
Multi-Family Residential | Cypress Court - St. Cloud, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Cypress Court - St. Cloud, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Deer Ridge - Jamestown, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					11,001
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					711
Buildings & Improvements					24,129
Costs capitalized subsequent to acquisition					201
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					738
Buildings & Improvements					24,303
Total	25,041				25,041
Accumulated Depreciation	(3,534)				(3,534)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	25,041
Deductions during year [Abstract]
Balance at close of year	3,534
Multi-Family Residential | Deer Ridge - Jamestown, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Deer Ridge - Jamestown, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Dylan - Denver Co
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					12,155
Buildings & Improvements					77,215
Costs capitalized subsequent to acquisition					572
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					12,155
Buildings & Improvements					77,787
Total	89,942				89,942
Accumulated Depreciation	(2,917)				(2,917)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	89,942
Deductions during year [Abstract]
Balance at close of year	2,917
Multi-Family Residential | Dylan - Denver Co | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Dylan - Denver Co | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Evergreen - Isanti, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,129
Buildings & Improvements					5,524
Costs capitalized subsequent to acquisition					430
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,141
Buildings & Improvements					5,942
Total	7,083				7,083
Accumulated Depreciation	(1,528)				(1,528)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,083
Deductions during year [Abstract]
Balance at close of year	1,528
Multi-Family Residential | Evergreen - Isanti, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Evergreen - Isanti, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Forest Park - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,011
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					810
Buildings & Improvements					5,579
Costs capitalized subsequent to acquisition					8,447
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,473
Buildings & Improvements					13,363
Total	14,836				14,836
Accumulated Depreciation	(7,928)				(7,928)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	14,836
Deductions during year [Abstract]
Balance at close of year	7,928
Multi-Family Residential | Forest Park - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Forest Park - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | French Creek - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					201
Buildings & Improvements					4,735
Costs capitalized subsequent to acquisition					217
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					207
Buildings & Improvements					4,946
Total	5,153				5,153
Accumulated Depreciation	(434)				(434)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,153
Deductions during year [Abstract]
Balance at close of year	434
Multi-Family Residential | French Creek - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | French Creek - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Gables Townhomes - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					1,351
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					349
Buildings & Improvements					1,921
Costs capitalized subsequent to acquisition					257
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					400
Buildings & Improvements					2,127
Total	2,527				2,527
Accumulated Depreciation	(458)				(458)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	2,527
Deductions during year [Abstract]
Balance at close of year	458
Multi-Family Residential | Gables Townhomes - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Gables Townhomes - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Gardens - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					518
Buildings & Improvements					8,702
Costs capitalized subsequent to acquisition					113
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					528
Buildings & Improvements					8,805
Total	9,333				9,333
Accumulated Depreciation	(1,017)				(1,017)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,333
Deductions during year [Abstract]
Balance at close of year	1,017
Multi-Family Residential | Gardens - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Gardens - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Grand Gateway - St. Cloud, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					814
Buildings & Improvements					7,086
Costs capitalized subsequent to acquisition					1,888
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					961
Buildings & Improvements					8,827
Total	9,788				9,788
Accumulated Depreciation	(2,406)				(2,406)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,788
Deductions during year [Abstract]
Balance at close of year	2,406
Multi-Family Residential | Grand Gateway - St. Cloud, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Grand Gateway - St. Cloud, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | GrandeVille at Cascade Lake - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					36,000
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					5,003
Buildings & Improvements					50,363
Costs capitalized subsequent to acquisition					1,651
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					5,065
Buildings & Improvements					51,952
Total	57,017				57,017
Accumulated Depreciation	(5,814)				(5,814)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	57,017
Deductions during year [Abstract]
Balance at close of year	5,814
Multi-Family Residential | GrandeVille at Cascade Lake - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | GrandeVille at Cascade Lake - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Greenfield - Omaha, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					578
Buildings & Improvements					4,122
Costs capitalized subsequent to acquisition					1,344
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					872
Buildings & Improvements					5,172
Total	6,044				6,044
Accumulated Depreciation	(1,799)				(1,799)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,044
Deductions during year [Abstract]
Balance at close of year	1,799
Multi-Family Residential | Greenfield - Omaha, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Greenfield - Omaha, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Heritage Manor - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,248
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					403
Buildings & Improvements					6,968
Costs capitalized subsequent to acquisition					3,317
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					682
Buildings & Improvements					10,006
Total	10,688				10,688
Accumulated Depreciation	(5,251)				(5,251)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	10,688
Deductions during year [Abstract]
Balance at close of year	5,251
Multi-Family Residential | Heritage Manor - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Heritage Manor - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Homestead Garden - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					655
Buildings & Improvements					14,139
Costs capitalized subsequent to acquisition					665
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					718
Buildings & Improvements					14,741
Total	15,459				15,459
Accumulated Depreciation	(2,195)				(2,195)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	15,459
Deductions during year [Abstract]
Balance at close of year	2,195
Multi-Family Residential | Homestead Garden - Rapid City, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Homestead Garden - Rapid City, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Indian Hills - Sioux City, IA
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					294
Buildings & Improvements					2,921
Costs capitalized subsequent to acquisition					4,489
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					470
Buildings & Improvements					7,234
Total	7,704				7,704
Accumulated Depreciation	(2,361)				(2,361)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,704
Deductions during year [Abstract]
Balance at close of year	2,361
Multi-Family Residential | Indian Hills - Sioux City, IA | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Indian Hills - Sioux City, IA | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Kirkwood Manor - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,039
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					449
Buildings & Improvements					2,725
Costs capitalized subsequent to acquisition					1,950
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					625
Buildings & Improvements					4,499
Total	5,124				5,124
Accumulated Depreciation	(2,498)				(2,498)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,124
Deductions during year [Abstract]
Balance at close of year	2,498
Multi-Family Residential | Kirkwood Manor - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Kirkwood Manor - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Lakeside Village Lincoln, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					12,111
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,215
Buildings & Improvements					15,837
Costs capitalized subsequent to acquisition					1,202
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,348
Buildings & Improvements					16,906
Total	18,254				18,254
Accumulated Depreciation	(3,659)				(3,659)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	18,254
Deductions during year [Abstract]
Balance at close of year	3,659
Multi-Family Residential | Lakeside Village Lincoln, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Lakeside Village Lincoln, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Landmark - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					184
Buildings & Improvements					1,514
Costs capitalized subsequent to acquisition					1,215
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					366
Buildings & Improvements					2,547
Total	2,913				2,913
Accumulated Depreciation	(1,492)				(1,492)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	2,913
Deductions during year [Abstract]
Balance at close of year	1,492
Multi-Family Residential | Landmark - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed			30 years
Multi-Family Residential | Landmark - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed			37 years
Multi-Family Residential | Legacy - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					14,031
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,362
Buildings & Improvements					21,727
Costs capitalized subsequent to acquisition					10,479
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,263
Buildings & Improvements					31,305
Total	33,568				33,568
Accumulated Depreciation	(15,220)				(15,220)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	33,568
Deductions during year [Abstract]
Balance at close of year	15,220
Multi-Family Residential | Legacy - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Legacy - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Legacy Heights - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,207
Buildings & Improvements					13,742
Costs capitalized subsequent to acquisition					419
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,307
Buildings & Improvements					14,061
Total	15,368				15,368
Accumulated Depreciation	(1,578)				(1,578)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	15,368
Deductions during year [Abstract]
Balance at close of year	1,578
Multi-Family Residential | Legacy Heights - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Legacy Heights - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Mariposa - Topeka, KS
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					2,715
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					399
Buildings & Improvements					5,110
Costs capitalized subsequent to acquisition					1,041
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					455
Buildings & Improvements					6,095
Total	6,550				6,550
Accumulated Depreciation	(2,228)				(2,228)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,550
Deductions during year [Abstract]
Balance at close of year	2,228
Multi-Family Residential | Mariposa - Topeka, KS | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Mariposa - Topeka, KS | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Meadows - Jamestown, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					590
Buildings & Improvements					4,519
Costs capitalized subsequent to acquisition					1,955
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					710
Buildings & Improvements					6,354
Total	7,064				7,064
Accumulated Depreciation	(3,091)				(3,091)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,064
Deductions during year [Abstract]
Balance at close of year	3,091
Multi-Family Residential | Meadows - Jamestown, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Meadows - Jamestown, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Monticello Crossings - Monticello, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,734
Buildings & Improvements					30,136
Costs capitalized subsequent to acquisition					28
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,734
Buildings & Improvements					30,164
Total	31,898				31,898
Accumulated Depreciation	(2,648)				(2,648)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	31,898
Deductions during year [Abstract]
Balance at close of year	2,648
Multi-Family Residential | Monticello Crossings - Monticello, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Monticello Crossings - Monticello, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Monticello Village - Monticello, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					490
Buildings & Improvements					3,756
Costs capitalized subsequent to acquisition					1,108
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					638
Buildings & Improvements					4,716
Total	5,354				5,354
Accumulated Depreciation	(1,922)				(1,922)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,354
Deductions during year [Abstract]
Balance at close of year	1,922
Multi-Family Residential | Monticello Village - Monticello, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Monticello Village - Monticello, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | North Pointe - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,175
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					303
Buildings & Improvements					3,957
Costs capitalized subsequent to acquisition					1,359
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					384
Buildings & Improvements					5,235
Total	5,619				5,619
Accumulated Depreciation	(2,331)				(2,331)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,619
Deductions during year [Abstract]
Balance at close of year	2,331
Multi-Family Residential | North Pointe - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | North Pointe - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Northridge - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					884
Buildings & Improvements					7,515
Costs capitalized subsequent to acquisition					191
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					974
Buildings & Improvements					7,616
Total	8,590				8,590
Accumulated Depreciation	(1,041)				(1,041)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,590
Deductions during year [Abstract]
Balance at close of year	1,041
Multi-Family Residential | Northridge - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Northridge - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Oakmont Estates - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					422
Buildings & Improvements					4,838
Costs capitalized subsequent to acquisition					1,404
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					711
Buildings & Improvements					5,953
Total	6,664				6,664
Accumulated Depreciation	(2,664)				(2,664)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,664
Deductions during year [Abstract]
Balance at close of year	2,664
Multi-Family Residential | Oakmont Estates - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Oakmont Estates - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Oakwood Estates - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					543
Buildings & Improvements					2,784
Costs capitalized subsequent to acquisition					4,828
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					868
Buildings & Improvements					7,287
Total	8,155				8,155
Accumulated Depreciation	(5,235)				(5,235)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,155
Deductions during year [Abstract]
Balance at close of year	5,235
Multi-Family Residential | Oakwood Estates - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Oakwood Estates - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Olympic Village - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					9,777
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,164
Buildings & Improvements					10,441
Costs capitalized subsequent to acquisition					4,033
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,829
Buildings & Improvements					13,809
Total	15,638				15,638
Accumulated Depreciation	(6,978)				(6,978)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	15,638
Deductions during year [Abstract]
Balance at close of year	6,978
Multi-Family Residential | Olympic Village - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Olympic Village - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Olympik Village - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,895
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,034
Buildings & Improvements					6,109
Costs capitalized subsequent to acquisition					2,718
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,368
Buildings & Improvements					8,493
Total	9,861				9,861
Accumulated Depreciation	(3,336)				(3,336)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,861
Deductions during year [Abstract]
Balance at close of year	3,336
Multi-Family Residential | Olympik Village - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Olympik Village - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Oxbo - St Paul, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					5,809
Buildings & Improvements					51,586
Costs capitalized subsequent to acquisition					167
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					5,879
Buildings & Improvements					51,683
Total	57,562				57,562
Accumulated Depreciation	(3,093)				(3,093)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	57,562
Deductions during year [Abstract]
Balance at close of year	3,093
Multi-Family Residential | Oxbo - St Paul, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Oxbo - St Paul, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Oxbow Park - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					404
Buildings & Improvements					3,152
Costs capitalized subsequent to acquisition					3,738
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					993
Buildings & Improvements					6,301
Total	7,294				7,294
Accumulated Depreciation	(4,496)				(4,496)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,294
Deductions during year [Abstract]
Balance at close of year	4,496
Multi-Family Residential | Oxbow Park - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Oxbow Park - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Park Meadows - Waite Park, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,934
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,143
Buildings & Improvements					9,099
Costs capitalized subsequent to acquisition					9,999
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,121
Buildings & Improvements					18,120
Total	20,241				20,241
Accumulated Depreciation	(9,812)				(9,812)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	20,241
Deductions during year [Abstract]
Balance at close of year	9,812
Multi-Family Residential | Park Meadows - Waite Park, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Park Meadows - Waite Park, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Park Place - Plymouth, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					10,609
Buildings & Improvements					80,781
Costs capitalized subsequent to acquisition					3,471
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					10,623
Buildings & Improvements					84,238
Total	94,861				94,861
Accumulated Depreciation	(3,892)				(3,892)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	94,861
Deductions during year [Abstract]
Balance at close of year	3,892
Multi-Family Residential | Park Place - Plymouth, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Park Place - Plymouth, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Pebble Springs - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					7
Buildings & Improvements					748
Costs capitalized subsequent to acquisition					236
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					65
Buildings & Improvements					926
Total	991				991
Accumulated Depreciation	(497)				(497)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	991
Deductions during year [Abstract]
Balance at close of year	497
Multi-Family Residential | Pebble Springs - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Pebble Springs - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Pinehurst - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					72
Buildings & Improvements					687
Costs capitalized subsequent to acquisition					523
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					168
Buildings & Improvements					1,114
Total	1,282				1,282
Accumulated Depreciation	(493)				(493)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	1,282
Deductions during year [Abstract]
Balance at close of year	493
Multi-Family Residential | Pinehurst - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Pinehurst - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Plaza - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					867
Buildings & Improvements					12,784
Costs capitalized subsequent to acquisition					3,046
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					998
Buildings & Improvements					15,699
Total	16,697				16,697
Accumulated Depreciation	(4,410)				(4,410)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	16,697
Deductions during year [Abstract]
Balance at close of year	4,410
Multi-Family Residential | Plaza - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Plaza - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Pointe West - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					2,393
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					240
Buildings & Improvements					3,538
Costs capitalized subsequent to acquisition					2,095
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					431
Buildings & Improvements					5,442
Total	5,873				5,873
Accumulated Depreciation	(3,253)				(3,253)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,873
Deductions during year [Abstract]
Balance at close of year	3,253
Multi-Family Residential | Pointe West - Rapid City, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Pointe West - Rapid City, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Ponds at Heritage Place - Sartell, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					395
Buildings & Improvements					4,564
Costs capitalized subsequent to acquisition					446
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					413
Buildings & Improvements					4,992
Total	5,405				5,405
Accumulated Depreciation	(1,098)				(1,098)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,405
Deductions during year [Abstract]
Balance at close of year	1,098
Multi-Family Residential | Ponds at Heritage Place - Sartell, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Ponds at Heritage Place - Sartell, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Prairie Winds - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					1,292
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					144
Buildings & Improvements					1,816
Costs capitalized subsequent to acquisition					739
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					309
Buildings & Improvements					2,390
Total	2,699				2,699
Accumulated Depreciation	(1,589)				(1,589)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	2,699
Deductions during year [Abstract]
Balance at close of year	1,589
Multi-Family Residential | Prairie Winds - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Prairie Winds - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Quarry Ridge - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					25,277
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,254
Buildings & Improvements					30,024
Costs capitalized subsequent to acquisition					2,092
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,406
Buildings & Improvements					31,964
Total	34,370				34,370
Accumulated Depreciation	(8,553)				(8,553)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	34,370
Deductions during year [Abstract]
Balance at close of year	8,553
Multi-Family Residential | Quarry Ridge - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Quarry Ridge - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Red 20 - Minneapolis, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					22,219
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,900
Buildings & Improvements					24,116
Costs capitalized subsequent to acquisition					185
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,908
Buildings & Improvements					24,293
Total	26,201				26,201
Accumulated Depreciation	(4,221)				(4,221)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	26,201
Deductions during year [Abstract]
Balance at close of year	4,221
Multi-Family Residential | Red 20 - Minneapolis, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Red 20 - Minneapolis, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Regency Park Estates - St. Cloud, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,838
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					702
Buildings & Improvements					10,198
Costs capitalized subsequent to acquisition					2,455
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,060
Buildings & Improvements					12,295
Total	13,355				13,355
Accumulated Depreciation	(3,121)				(3,121)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	13,355
Deductions during year [Abstract]
Balance at close of year	3,121
Multi-Family Residential | Regency Park Estates - St. Cloud, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Regency Park Estates - St. Cloud, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Ridge Oaks - Sioux City, IA
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,131
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					178
Buildings & Improvements					4,073
Costs capitalized subsequent to acquisition					3,007
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					318
Buildings & Improvements					6,940
Total	7,258				7,258
Accumulated Depreciation	(3,250)				(3,250)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,258
Deductions during year [Abstract]
Balance at close of year	3,250
Multi-Family Residential | Ridge Oaks - Sioux City, IA | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Ridge Oaks - Sioux City, IA | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Rimrock West - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,046
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					330
Buildings & Improvements					3,489
Costs capitalized subsequent to acquisition					2,062
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					516
Buildings & Improvements					5,365
Total	5,881				5,881
Accumulated Depreciation	(2,647)				(2,647)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	5,881
Deductions during year [Abstract]
Balance at close of year	2,647
Multi-Family Residential | Rimrock West - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Rimrock West - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | River Ridge - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					576
Buildings & Improvements					24,670
Costs capitalized subsequent to acquisition					899
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					793
Buildings & Improvements					25,352
Total	26,145				26,145
Accumulated Depreciation	(5,598)				(5,598)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	26,145
Deductions during year [Abstract]
Balance at close of year	5,598
Multi-Family Residential | River Ridge - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | River Ridge - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Rocky Meadows - Billings, MT
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					4,722
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					656
Buildings & Improvements					5,726
Costs capitalized subsequent to acquisition					1,617
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					815
Buildings & Improvements					7,184
Total	7,999				7,999
Accumulated Depreciation	(4,087)				(4,087)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	7,999
Deductions during year [Abstract]
Balance at close of year	4,087
Multi-Family Residential | Rocky Meadows - Billings, MT | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Rocky Meadows - Billings, MT | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Rum River - Isanti, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,235
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					843
Buildings & Improvements					4,823
Costs capitalized subsequent to acquisition					463
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					864
Buildings & Improvements					5,265
Total	6,129				6,129
Accumulated Depreciation	(1,700)				(1,700)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,129
Deductions during year [Abstract]
Balance at close of year	1,700
Multi-Family Residential | Rum River - Isanti, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Rum River - Isanti, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Sherwood - Topeka, KS
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					11,268
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,142
Buildings & Improvements					14,684
Costs capitalized subsequent to acquisition					5,327
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,159
Buildings & Improvements					18,994
Total	21,153				21,153
Accumulated Depreciation	(9,478)				(9,478)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	21,153
Deductions during year [Abstract]
Balance at close of year	9,478
Multi-Family Residential | Sherwood - Topeka, KS | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Sherwood - Topeka, KS | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Sierra Vista - Sioux Falls, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					241
Buildings & Improvements					2,097
Costs capitalized subsequent to acquisition					596
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					291
Buildings & Improvements					2,643
Total	2,934				2,934
Accumulated Depreciation	(662)				(662)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	2,934
Deductions during year [Abstract]
Balance at close of year	662
Multi-Family Residential | Sierra Vista - Sioux Falls, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Sierra Vista - Sioux Falls, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Silver Springs - Rapid City, SD
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					2,088
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					215
Buildings & Improvements					3,007
Costs capitalized subsequent to acquisition					724
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					257
Buildings & Improvements					3,689
Total	3,946				3,946
Accumulated Depreciation	(574)				(574)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	3,946
Deductions during year [Abstract]
Balance at close of year	574
Multi-Family Residential | Silver Springs - Rapid City, SD | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Silver Springs - Rapid City, SD | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | South Pointe - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,871
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					550
Buildings & Improvements					9,548
Costs capitalized subsequent to acquisition					5,638
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,373
Buildings & Improvements					14,363
Total	15,736				15,736
Accumulated Depreciation	(8,222)				(8,222)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	15,736
Deductions during year [Abstract]
Balance at close of year	8,222
Multi-Family Residential | South Pointe - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | South Pointe - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Southpoint - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					576
Buildings & Improvements					9,893
Costs capitalized subsequent to acquisition					169
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					633
Buildings & Improvements					10,005
Total	10,638				10,638
Accumulated Depreciation	(1,548)				(1,548)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	10,638
Deductions during year [Abstract]
Balance at close of year	1,548
Multi-Family Residential | Southpoint - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Southpoint - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Southwind - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					5,031
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					400
Buildings & Improvements					4,938
Costs capitalized subsequent to acquisition					4,119
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					827
Buildings & Improvements					8,630
Total	9,457				9,457
Accumulated Depreciation	(4,988)				(4,988)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,457
Deductions during year [Abstract]
Balance at close of year	4,988
Multi-Family Residential | Southwind - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Southwind - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Sunset Trail - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,476
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					336
Buildings & Improvements					12,814
Costs capitalized subsequent to acquisition					3,283
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					720
Buildings & Improvements					15,713
Total	16,433				16,433
Accumulated Depreciation	(7,608)				(7,608)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	16,433
Deductions during year [Abstract]
Balance at close of year	7,608
Multi-Family Residential | Sunset Trail - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Sunset Trail - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Thomasbrook - Lincoln, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					5,496
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					600
Buildings & Improvements					10,306
Costs capitalized subsequent to acquisition					5,329
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,646
Buildings & Improvements					14,589
Total	16,235				16,235
Accumulated Depreciation	(6,829)				(6,829)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	16,235
Deductions during year [Abstract]
Balance at close of year	6,829
Multi-Family Residential | Thomasbrook - Lincoln, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Thomasbrook - Lincoln, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Valley Park - Grand Forks, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					3,555
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					294
Buildings & Improvements					4,137
Costs capitalized subsequent to acquisition					4,049
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,223
Buildings & Improvements					7,257
Total	8,480				8,480
Accumulated Depreciation	(4,072)				(4,072)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,480
Deductions during year [Abstract]
Balance at close of year	4,072
Multi-Family Residential | Valley Park - Grand Forks, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Valley Park - Grand Forks, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Villa West - Topeka, KS
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					11,381
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,590
Buildings & Improvements					15,760
Costs capitalized subsequent to acquisition					1,882
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,338
Buildings & Improvements					16,894
Total	19,232				19,232
Accumulated Depreciation	(3,787)				(3,787)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	19,232
Deductions during year [Abstract]
Balance at close of year	3,787
Multi-Family Residential | Villa West - Topeka, KS | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Villa West - Topeka, KS | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Village Green - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					234
Buildings & Improvements					2,296
Costs capitalized subsequent to acquisition					1,068
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					359
Buildings & Improvements					3,239
Total	3,598				3,598
Accumulated Depreciation	(1,394)				(1,394)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	3,598
Deductions during year [Abstract]
Balance at close of year	1,394
Multi-Family Residential | Village Green - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Village Green - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Westend - Denver CO
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					25,525
Buildings & Improvements					102,180
Costs capitalized subsequent to acquisition					174
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					25,525
Buildings & Improvements					102,354
Total	127,879				127,879
Accumulated Depreciation	(2,848)				(2,848)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	127,879
Deductions during year [Abstract]
Balance at close of year	2,848
Multi-Family Residential | Westend - Denver CO | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Westend - Denver CO | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | West Stonehill - Waite Park, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					7,720
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					939
Buildings & Improvements					10,167
Costs capitalized subsequent to acquisition					7,836
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,914
Buildings & Improvements					17,028
Total	18,942				18,942
Accumulated Depreciation	(9,874)				(9,874)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	18,942
Deductions during year [Abstract]
Balance at close of year	9,874
Multi-Family Residential | West Stonehill - Waite Park, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | West Stonehill - Waite Park, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Westwood Park - Bismarck, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					1,814
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					116
Buildings & Improvements					1,909
Costs capitalized subsequent to acquisition					2,063
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					293
Buildings & Improvements					3,795
Total	4,088				4,088
Accumulated Depreciation	(2,114)				(2,114)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	4,088
Deductions during year [Abstract]
Balance at close of year	2,114
Multi-Family Residential | Westwood Park - Bismarck, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Westwood Park - Bismarck, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Whispering Ridge - Omaha, NE
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					20,561
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,139
Buildings & Improvements					25,424
Costs capitalized subsequent to acquisition					1,693
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,438
Buildings & Improvements					26,818
Total	29,256				29,256
Accumulated Depreciation	(5,317)				(5,317)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	29,256
Deductions during year [Abstract]
Balance at close of year	5,317
Multi-Family Residential | Whispering Ridge - Omaha, NE | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Whispering Ridge - Omaha, NE | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Winchester - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					748
Buildings & Improvements					5,622
Costs capitalized subsequent to acquisition					2,554
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,044
Buildings & Improvements					7,880
Total	8,924				8,924
Accumulated Depreciation	(3,536)				(3,536)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	8,924
Deductions during year [Abstract]
Balance at close of year	3,536
Multi-Family Residential | Winchester - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Winchester - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Woodridge - Rochester, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					5,610
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					370
Buildings & Improvements					6,028
Costs capitalized subsequent to acquisition					3,358
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					750
Buildings & Improvements					9,006
Total	9,756				9,756
Accumulated Depreciation	(5,068)				(5,068)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,756
Deductions during year [Abstract]
Balance at close of year	5,068
Multi-Family Residential | Woodridge - Rochester, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Multi-Family Residential | Woodridge - Rochester, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Multi-Family Residential | Wholly Owned Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Additions	0	$ 369,332	$ 61,565	$ 285,080
Other - Mixed Use
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					389
Buildings & Improvements					17,320
Costs capitalized subsequent to acquisition					5,012
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					598
Buildings & Improvements					22,123
Total	22,721				22,721
Accumulated Depreciation	(4,674)				(4,674)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	22,721
Deductions during year [Abstract]
Balance at close of year	4,674
Other - Mixed Use | 71 France - Edina, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					0
Buildings & Improvements					5,879
Costs capitalized subsequent to acquisition					775
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					0
Buildings & Improvements					6,654
Total	6,654				6,654
Accumulated Depreciation	(585)				(585)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,654
Deductions during year [Abstract]
Balance at close of year	585
Other - Mixed Use | 71 France - Edina, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Mixed Use | 71 France - Edina, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Mixed Use | Oxbo - St Paul, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					0
Buildings & Improvements					3,472
Costs capitalized subsequent to acquisition					54
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					0
Buildings & Improvements					3,526
Total	3,526				3,526
Accumulated Depreciation	(194)				(194)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	3,526
Deductions during year [Abstract]
Balance at close of year	194
Other - Mixed Use | Oxbo - St Paul, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Mixed Use | Oxbo - St Paul, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Mixed Use | Plaza - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					389
Buildings & Improvements					5,444
Costs capitalized subsequent to acquisition					3,764
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					598
Buildings & Improvements					8,999
Total	9,597				9,597
Accumulated Depreciation	(3,494)				(3,494)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	9,597
Deductions during year [Abstract]
Balance at close of year	3,494
Other - Mixed Use | Plaza - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Mixed Use | Plaza - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Mixed Use | Red 20 - Minneapolis, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					0
Buildings & Improvements					2,525
Costs capitalized subsequent to acquisition					419
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					0
Buildings & Improvements					2,944
Total	2,944				2,944
Accumulated Depreciation	(401)				(401)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	2,944
Deductions during year [Abstract]
Balance at close of year	401
Other - Mixed Use | Red 20 - Minneapolis, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Mixed Use | Red 20 - Minneapolis, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Commercial
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					2,642
Buildings & Improvements					14,880
Costs capitalized subsequent to acquisition					4,476
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					2,668
Buildings & Improvements					19,330
Total	21,998				21,998
Accumulated Depreciation	(9,116)				(9,116)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	21,998
Deductions during year [Abstract]
Balance at close of year	9,116
Other - Commercial | Dakota West Plaza - Minot , ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					92
Buildings & Improvements					493
Costs capitalized subsequent to acquisition					39
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					106
Buildings & Improvements					518
Total	624				624
Accumulated Depreciation	(185)				(185)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	624
Deductions during year [Abstract]
Balance at close of year	185
Other - Commercial | Dakota West Plaza - Minot , ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Commercial | Dakota West Plaza - Minot , ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Commercial | Minot 1400 31st Ave - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,026
Buildings & Improvements					6,143
Costs capitalized subsequent to acquisition					4,437
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,038
Buildings & Improvements					10,568
Total	11,606				11,606
Accumulated Depreciation	(5,485)				(5,485)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	11,606
Deductions during year [Abstract]
Balance at close of year	5,485
Other - Commercial | Minot 1400 31st Ave - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Commercial | Minot 1400 31st Ave - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Commercial | Minot IPS - Minot, ND
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					416
Buildings & Improvements					5,952
Costs capitalized subsequent to acquisition					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					416
Buildings & Improvements					5,952
Total	6,368				6,368
Accumulated Depreciation	(3,399)				(3,399)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	6,368
Deductions during year [Abstract]
Balance at close of year	3,399
Other - Commercial | Minot IPS - Minot, ND | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Commercial | Minot IPS - Minot, ND | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Other - Commercial | Woodbury 1865 Woodlane - Woodbury, MN
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					1,108
Buildings & Improvements					2,292
Costs capitalized subsequent to acquisition					0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					1,108
Buildings & Improvements					2,292
Total	3,400				3,400
Accumulated Depreciation	(47)				(47)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	3,400
Deductions during year [Abstract]
Balance at close of year	47
Other - Commercial | Woodbury 1865 Woodlane - Woodbury, MN | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		30 years
Other - Commercial | Woodbury 1865 Woodlane - Woodbury, MN | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Life on which depreciation in latest income statement is computed		37 years
Subtotal
Real Estate And Accumulated Depreciation [Abstract]
Encumbrances					445,974
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Land					133,634
Buildings & Improvements					1,292,639
Costs capitalized subsequent to acquisition					201,363
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract]
Land					156,664
Buildings & Improvements					1,470,972
Total	1,627,636				1,627,636
Accumulated Depreciation	(353,871)				$ (353,871)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at close of year	1,627,636
Deductions during year [Abstract]
Balance at close of year	$ 353,871