Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Return of capital distribution from CMTG/CN Mortgage REIT LLC	$ 123.2	$ 111.1
Loan Commitments Refunded	1,500.0	1,100.0
Existing Secured Financing Commitments	$ 564.6	$ 584.3
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	$ 162.7	$ 162.1
Remaining capital commitment	$ 73.2	$ 73.8