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Significant Accounting Policies - Narrative (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2019 bulk_disposition	Dec. 31, 2021 USD ($) singleFamilyProperty property segment	Dec. 31, 2020 USD ($) singleFamilyProperty	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Property Subject to or Available for Operating Lease
Investments in unconsolidated joint ventures		$ 121,950,000	$ 93,109,000
Deferred tax asset and liability, net		0
Net operating loss carryforward		25,400,000	68,600,000
Investments in Real Estate
Purchase price		850,071,000	269,273,000	$ 120,487,000
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Impairment of long-lived assets held-for-use		0	0	0
Depreciation and Amortization
Impairment of intangible assets		0	0	0
Goodwill
Goodwill		120,279,000	120,279,000
Goodwill impairments		$ 0	0	0
Impairment charge on joint ventures			4,900,000
Number of bulk disposals | bulk_disposition	2
Revenue and Expense Recognition
Revenue recognition period of operating lease		1 year
Leasing Costs
Lease amortization period		1 year
Share-Based Compensation
Required retirement notice period		6 months
Weighted-average period of unvested cost		6 months
Segment Reporting
Number of reportable segments | segment		1
Cumulative effect adjustment		$ (6,738,429,000)	(6,472,430,000)	(6,018,790,000)	$ (5,973,742,000)
Gain (Loss) on Investments
Goodwill
Impairment charge on joint ventures			3,500,000
Other Operating Income (Expense)
Goodwill
Impairment charge on joint ventures			1,400,000
Accumulated deficit
Segment Reporting
Cumulative effect adjustment		$ 438,710,000	$ 443,522,000	465,368,000	$ 491,214,000
Cumulative Effect, Period of Adoption, Adjustment
Segment Reporting
Cumulative effect adjustment				1,494,000
Cumulative Effect, Period of Adoption, Adjustment | Accumulated deficit
Segment Reporting
Cumulative effect adjustment				1,494,000
Building and Building Improvements
Depreciation and Amortization
Estimated useful life of asset		30 years
Building and Building Improvements | Minimum
Depreciation and Amortization
Estimated useful life of asset		3 years
Building and Building Improvements | Maximum
Depreciation and Amortization
Estimated useful life of asset		30 years
Database Rights
Depreciation and Amortization
Useful life of intangible assets		7 years
Single Family Homes
Investments in Real Estate
Number of properties acquired | property		2,638
Purchase price		$ 840,000,000
Single-family Properties Held for Sale and Discontinued Operations
Number of properties | singleFamilyProperty		57,024
Single Family Homes | Minimum
Investments in Real Estate
Purchase price of properties allocated to land, percent		15.00%
Single Family Homes | Maximum
Investments in Real Estate
Purchase price of properties allocated to land, percent		30.00%
Single Family Homes | Single-family Properties Identified for Future Sale
Single-family Properties Held for Sale and Discontinued Operations
Number of properties | singleFamilyProperty		659	711
Impairment of Real Estate		$ 200,000	$ 2,000,000	$ 3,700,000

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