Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Return of capital distribution from CMTG/CN Mortgage REIT LLC	$ 123.6	$ 111.1
Loan Commitments Refunded	$ 1,800.0	$ 1,100.0
Maximum
Loss Contingencies [Line Items]
Lease Expiration Period	5 years	5 years
Claros Mortgage Trust
Loss Contingencies [Line Items]
Commitment Interest	51.00%
Commitment Amount	$ 124.9
Loan Repayment Period	6 months
Company Contribution Amount	$ 163.1	$ 162.1
Remaining capital commitment	$ 72.9	$ 73.8

Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21D
-URI https://asc.fasb.org/extlink&oid=126954810&loc=SL94080555-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

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