Investments in Real Estate Debt - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Investments [Abstract]
Unrealized losses on investments in real estate debt	$ (4.6)		$ (6.2)	$ (4.7)
Unrealized gains on investments in real estate debt		$ 9.2
Realized losses investments in real estate debt		$ (1.2)		$ (5.8)

Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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- Definition

Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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