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Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Capital Addition Purchase Commitments
Loss Contingencies
Commitments	$ 192.7
Unsecured debt | Revolving credit facility
Loss Contingencies
Letters of credit, amount outstanding	3.4
Real estate technology venture capital fund
Loss Contingencies
Commitments	20.0
Investment, contributions to date	6.1
Commitment remaining contribution amount	13.9
Supportive Housing venture Capital Fund
Loss Contingencies
Commitments	3.0
Investment, contributions to date	0.2
Commitment remaining contribution amount	$ 2.8

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- Definition

Long Term Purchase Commitment Remaining Contribution Amount

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- Definition

Payments To Acquire Investments, To Date

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

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- Definition

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

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