Investments in Real Estate Debt - Summary of Affiliate Investments in Real Estate Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Investments in real estate debt	$ 1,031,340	$ 954,077
Affiliated Entity
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Investments in real estate debt	398,066	295,465
Affiliated Entity \| CMBS
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Investments in real estate debt	$ 398,066	$ 295,465

Amount of 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 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Name:	us-gaap_TradingSecuritiesDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant