Real Estate Investments - Summary of Major Components of Investments in Multifamily Properties (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Land	$ 340,691	$ 323,429
Buildings and improvements	1,605,723	1,544,115
Intangible lease assets	1,972	1,675
Construction in progress	9,487	10,796
Furniture, fixtures, and equipment	102,469	96,228
Real estate investment, gross	2,060,342	1,976,243
Accumulated depreciation and amortization	(242,952)	(215,494)
Total Net Operating Real Estate Investments	1,817,390	1,760,749
Accumulated depreciation and amortization	(11,028)	0
Total Net Real Estate Investments	1,861,240	1,760,749
Real Estate Properties Held For Sale
Real Estate Properties [Line Items]
Total Net Operating Real Estate Investments	43,850
Multifamily Properties
Real Estate Properties [Line Items]
Accumulated depreciation and amortization	(11,028)
Total Net Real Estate Investments	1,861,240
Multifamily Properties | Intangible Lease Assets
Real Estate Properties [Line Items]
Total Net Real Estate Investments	1,972
Multifamily Properties | Land
Real Estate Properties [Line Items]
Total Net Real Estate Investments	344,453
Multifamily Properties | Improvements
Real Estate Properties [Line Items]
Accumulated depreciation and amortization	(7,537)
Total Net Real Estate Investments	1,471,947
Multifamily Properties | Construction in Progress
Real Estate Properties [Line Items]
Total Net Real Estate Investments	9,487
Multifamily Properties | Furniture, Fixtures, and Equipment
Real Estate Properties [Line Items]
Accumulated depreciation and amortization	(3,491)
Total Net Real Estate Investments	33,381
Multifamily Properties | Real Estate Properties Held For Sale
Real Estate Properties [Line Items]
Total Net Operating Real Estate Investments	43,850
Multifamily Properties | Real Estate Properties Held For Sale | Land
Real Estate Properties [Line Items]
Total Net Operating Real Estate Investments	3,762
Multifamily Properties | Real Estate Properties Held For Sale | Improvements
Real Estate Properties [Line Items]
Total Net Operating Real Estate Investments	39,028
Multifamily Properties | Real Estate Properties Held For Sale | Furniture, Fixtures, and Equipment
Real Estate Properties [Line Items]
Total Net Operating Real Estate Investments	1,060
Multifamily Properties | Arbors on Forest Ridge
Real Estate Properties [Line Items]
Land	2,330	2,330
Buildings and improvements	11,689	11,682
Construction in progress	37	17
Furniture, fixtures, and equipment	1,725	1,650
Real estate investment, gross	15,781	15,679
Multifamily Properties | Cutter's Point
Real Estate Properties [Line Items]
Land	3,330	3,330
Buildings and improvements	13,318	8,035
Construction in progress	3,269	4,983
Furniture, fixtures, and equipment	2,053	2,044
Real estate investment, gross	21,970	18,392
Multifamily Properties | Silverbrook
Real Estate Properties [Line Items]
Land	4,860	4,860
Buildings and improvements	27,302	27,256
Construction in progress	43	3
Furniture, fixtures, and equipment	5,321	5,049
Real estate investment, gross	37,526	37,168
Multifamily Properties | Beechwood Terrace
Real Estate Properties [Line Items]
Land		1,390
Buildings and improvements		22,233
Construction in progress		32
Furniture, fixtures, and equipment		2,791
Real estate investment, gross		26,446
Multifamily Properties | Beechwood Terrace | Real Estate Properties Held For Sale
Real Estate Properties [Line Items]
Land	1,390
Buildings and improvements	22,281
Furniture, fixtures, and equipment	2,905
Real estate investment, gross	26,576
Multifamily Properties | The Summit at Sabal Park
Real Estate Properties [Line Items]
Land	5,770	5,770
Buildings and improvements	13,763	13,749
Furniture, fixtures, and equipment	1,890	1,813
Real estate investment, gross	21,423	21,332
Multifamily Properties | Courtney Cove
Real Estate Properties [Line Items]
Land	5,880	5,880
Buildings and improvements	13,942	13,713
Construction in progress	312	114
Furniture, fixtures, and equipment	2,265	2,165
Real estate investment, gross	22,399	21,872
Multifamily Properties | Radbourne Lake
Real Estate Properties [Line Items]
Land	2,440	2,440
Buildings and improvements	22,733	22,617
Furniture, fixtures, and equipment	2,272	2,147
Real estate investment, gross	27,445	27,204
Multifamily Properties | Timber Creek
Real Estate Properties [Line Items]
Land	11,260	11,260
Buildings and improvements	13,261	13,245
Construction in progress	48	42
Furniture, fixtures, and equipment	3,611	3,473
Real estate investment, gross	28,180	28,020
Multifamily Properties | Sabal Palm at Lake Buena Vista
Real Estate Properties [Line Items]
Land	7,580	7,580
Buildings and improvements	42,415	42,401
Construction in progress	2
Furniture, fixtures, and equipment	2,563	2,391
Real estate investment, gross	52,560	52,372
Multifamily Properties | Cornerstone
Real Estate Properties [Line Items]
Land	1,500	1,500
Buildings and improvements	30,808	30,781
Construction in progress		2
Furniture, fixtures, and equipment	3,534	3,343
Real estate investment, gross	35,842	35,626
Multifamily Properties | The Preserve at Terrell Mill
Real Estate Properties [Line Items]
Land	10,170	10,170
Buildings and improvements	52,079	50,757
Construction in progress	777	1,524
Furniture, fixtures, and equipment	8,121	7,310
Real estate investment, gross	71,147	69,761
Multifamily Properties | Versailles
Real Estate Properties [Line Items]
Land	6,720	6,720
Buildings and improvements	21,776	21,766
Construction in progress	4
Furniture, fixtures, and equipment	3,939	3,861
Real estate investment, gross	32,439	32,347
Multifamily Properties | Seasons 704 Apartments
Real Estate Properties [Line Items]
Land	7,480	7,480
Buildings and improvements	14,546	14,418
Construction in progress		18
Furniture, fixtures, and equipment	1,914	1,743
Real estate investment, gross	23,940	23,659
Multifamily Properties | Madera Point
Real Estate Properties [Line Items]
Land	4,920	4,920
Buildings and improvements	17,973	17,926
Furniture, fixtures, and equipment	2,432	2,273
Real estate investment, gross	25,325	25,119
Multifamily Properties | Venue at 8651
Real Estate Properties [Line Items]
Land	2,350	2,350
Buildings and improvements	16,695	17,473
Construction in progress	407	106
Furniture, fixtures, and equipment	3,654	3,531
Real estate investment, gross	23,106	23,460
Multifamily Properties | Parc500
Real Estate Properties [Line Items]
Land	3,860	3,860
Buildings and improvements	21,054	20,927
Construction in progress	9	22
Furniture, fixtures, and equipment	3,989	3,827
Real estate investment, gross	28,912	28,636
Multifamily Properties | The Venue on Camelback
Real Estate Properties [Line Items]
Land	8,340	8,340
Buildings and improvements	38,216	38,106
Construction in progress	17	37
Furniture, fixtures, and equipment	2,907	2,570
Real estate investment, gross	49,480	49,053
Multifamily Properties | Old Farm
Real Estate Properties [Line Items]
Land	11,078	11,078
Buildings and improvements	70,817	70,846
Construction in progress	128	24
Furniture, fixtures, and equipment	3,643	3,419
Real estate investment, gross	85,666	85,367
Multifamily Properties | Stone Creek at Old Farm
Real Estate Properties [Line Items]
Land	3,493	3,493
Buildings and improvements	19,363	19,471
Construction in progress	115
Furniture, fixtures, and equipment	828	792
Real estate investment, gross	23,799	23,756
Multifamily Properties | Hollister Place
Real Estate Properties [Line Items]
Land	2,782	2,782
Buildings and improvements	21,152	21,884
Construction in progress	386
Furniture, fixtures, and equipment	2,645	2,555
Real estate investment, gross	26,965	27,221
Multifamily Properties | Rockledge Apartments
Real Estate Properties [Line Items]
Land	17,451	17,451
Buildings and improvements	97,020	96,902
Construction in progress	169	86
Furniture, fixtures, and equipment	5,550	5,363
Real estate investment, gross	120,190	119,802
Multifamily Properties | Atera Apartments
Real Estate Properties [Line Items]
Land	22,371	22,371
Buildings and improvements	36,736	37,525
Construction in progress	915	9
Furniture, fixtures, and equipment	2,261	2,188
Real estate investment, gross	62,283	62,093
Multifamily Properties | Cedar Pointe
Real Estate Properties [Line Items]
Land		2,371
Buildings and improvements		24,268
Furniture, fixtures, and equipment		1,577
Real estate investment, gross		28,216
Multifamily Properties | Cedar Pointe | Real Estate Properties Held For Sale
Real Estate Properties [Line Items]
Land	2,372
Buildings and improvements	24,284
Furniture, fixtures, and equipment	1,646
Real estate investment, gross	28,302
Multifamily Properties | Crestmont Reserve
Real Estate Properties [Line Items]
Land	4,124	4,124
Buildings and improvements	21,048	20,955
Construction in progress		19
Furniture, fixtures, and equipment	1,454	1,411
Real estate investment, gross	26,626	26,509
Multifamily Properties | Brandywine I & II
Real Estate Properties [Line Items]
Land	6,237	6,237
Buildings and improvements	73,668	73,613
Construction in progress		6
Furniture, fixtures, and equipment	4,536	4,072
Real estate investment, gross	84,441	83,928
Multifamily Properties | Bella Vista
Real Estate Properties [Line Items]
Land	10,942	10,942
Buildings and improvements	36,856	36,787
Construction in progress	74
Furniture, fixtures, and equipment	2,440	2,110
Real estate investment, gross	50,312	49,839
Multifamily Properties | The Enclave
Real Estate Properties [Line Items]
Land	11,046	11,046
Buildings and improvements	30,336	30,308
Construction in progress	38
Furniture, fixtures, and equipment	2,127	1,856
Real estate investment, gross	43,547	43,210
Multifamily Properties | The Heritage
Real Estate Properties [Line Items]
Land	6,835	6,835
Buildings and improvements	34,808	34,761
Furniture, fixtures, and equipment	2,079	1,793
Real estate investment, gross	43,722	43,389
Multifamily Properties | Summers Landing
Real Estate Properties [Line Items]
Land	1,798	1,798
Buildings and improvements	18,047	17,909
Construction in progress	3	43
Furniture, fixtures, and equipment	708	670
Real estate investment, gross	20,556	20,420
Multifamily Properties | Residences at Glenview Reserve
Real Estate Properties [Line Items]
Land	3,367	3,367
Buildings and improvements	42,267	42,027
Construction in progress		14
Construction in progress	(15)
Furniture, fixtures, and equipment	2,041	1,495
Real estate investment, gross	47,660	46,903
Multifamily Properties | Residences at West Place
Real Estate Properties [Line Items]
Land	3,345	3,345
Buildings and improvements	51,963	51,802
Construction in progress	246	154
Furniture, fixtures, and equipment	1,324	1,049
Real estate investment, gross	56,878	56,350
Multifamily Properties | Avant at Pembroke Pines
Real Estate Properties [Line Items]
Land	48,434	48,436
Buildings and improvements	274,974	272,436
Construction in progress	1,752	2,847
Furniture, fixtures, and equipment	9,644	7,977
Real estate investment, gross	334,804	331,696
Multifamily Properties | Arbors of Brentwood
Real Estate Properties [Line Items]
Land	6,346	6,346
Buildings and improvements	55,886	55,777
Construction in progress		21
Furniture, fixtures, and equipment	1,829	1,118
Real estate investment, gross	64,061	63,262
Multifamily Properties | Torreyana Apartments
Real Estate Properties [Line Items]
Land	23,824	23,824
Buildings and improvements	43,612	43,489
Construction in progress	30	122
Furniture, fixtures, and equipment	1,212	1,047
Real estate investment, gross	68,678	68,482
Multifamily Properties | Fairways at San Marcos
Real Estate Properties [Line Items]
Land	10,993	10,993
Buildings and improvements	72,048	71,422
Intangible lease assets		1,675
Construction in progress	528
Furniture, fixtures, and equipment	1,248	745
Real estate investment, gross	84,817	84,835
Multifamily Properties | Bloom
Real Estate Properties [Line Items]
Land	23,805	23,805
Buildings and improvements	82,238	81,714
Construction in progress	166	494
Furniture, fixtures, and equipment	2,166	1,782
Real estate investment, gross	108,375	107,795
Multifamily Properties | The Verandas At Lake Norman
Real Estate Properties [Line Items]
Land	9,510
Buildings and improvements	52,758
Intangible lease assets	971
Furniture, fixtures, and equipment	541
Real estate investment, gross	63,780
Multifamily Properties | Bella Solara
Real Estate Properties [Line Items]
Land	12,605	12,605
Buildings and improvements	53,306	53,134
Construction in progress	27	57
Furniture, fixtures, and equipment	1,513	1,228
Real estate investment, gross	67,451	67,024
Multifamily Properties | Creekside At Matthews
Real Estate Properties [Line Items]
Land	11,515
Buildings and improvements	45,250
Intangible lease assets	1,001
Furniture, fixtures, and equipment	490
Real estate investment, gross	58,256
Multifamily Properties | Operating Properties
Real Estate Properties [Line Items]
Real estate investment, gross	2,060,342	1,976,243
Accumulated depreciation and amortization	(242,952)	(215,494)
Total Net Operating Real Estate Investments	1,817,390	1,760,749
Multifamily Properties | Operating Properties | Intangible Lease Assets
Real Estate Properties [Line Items]
Real estate investment, gross	1,972	1,675
Accumulated depreciation and amortization		(558)
Total Net Operating Real Estate Investments	1,972	1,117
Multifamily Properties | Operating Properties | Land
Real Estate Properties [Line Items]
Real estate investment, gross	340,691	323,429
Total Net Operating Real Estate Investments	340,691	323,429
Multifamily Properties | Operating Properties | Improvements
Real Estate Properties [Line Items]
Real estate investment, gross	1,605,723	1,544,115
Accumulated depreciation and amortization	(172,804)	(153,063)
Total Net Operating Real Estate Investments	1,432,919	1,391,052
Multifamily Properties | Operating Properties | Construction in Progress
Real Estate Properties [Line Items]
Real estate investment, gross	9,487	10,796
Total Net Operating Real Estate Investments	9,487	10,796
Multifamily Properties | Operating Properties | Furniture, Fixtures, and Equipment
Real Estate Properties [Line Items]
Real estate investment, gross	102,469	96,228
Accumulated depreciation and amortization	(70,148)	(61,873)
Total Net Operating Real Estate Investments	$ 32,321	$ 34,355