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Commitments and Contingencies (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) property	Dec. 31, 2020 USD ($) property
Purchase Commitment [Line Items]
Single-family properties sales in escrow | property	64	97
Single-family properties sales in escrow, selling price	$ 20.0	$ 24.0
Surety bond
Purchase Commitment [Line Items]
Surety bonds related to development contracts	47.5	36.7
Single Family Properties
Purchase Commitment [Line Items]
Purchase price of commitment to acquire single-family properties	146.9	81.7
Land
Purchase Commitment [Line Items]
Purchase price of commitment to acquire single-family properties	$ 90.1	$ 72.3
Commitment To Acquire Properties
Purchase Commitment [Line Items]
Number of properties | property	547	323

X

- Definition

Expected Proceeds from Sale of Property Held-for-sale

+ References

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+ Details

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X

- Definition

Number of Real Estate Properties Held-for-Sale in Escrow

+ References

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X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

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X

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

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