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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - CECL Allowance as Percentage of Amortized Cost and Total Commitment (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Allowance and Provision for Loan Credit Loss [Abstract] |  |  |  |  |
Beginning balance, specific CECL allowance, funded |  | $ 145,000 |  |  |
Quarter allowances (reversals), specific CECL allowance, funded | [1] | 18,611 | $ (1,238) |  |
Ending balance, specific CECL allowance, funded |  | 175,000 |  |  |
Financing Receivable, Funded, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance, General CECL allowance, funded |  | 33,588 | 38,102 |  |
Quarter allowances (reversals), General CECL allowance, funded |  | (12,211) | (1,667) |  |
Ending balance, General CECL allowance, funded |  | 21,377 | 36,435 |  |
Financing Receivable, Unfunded, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance, General CECL allowance, unfunded |  | 3,106 | 3,365 |  |
Quarter allowances (reversals), General CECL allowance, unfunded |  | 822 | 429 |  |
Ending balance, General CECL allowance, unfunded |  | 3,928 | 3,794 |  |
Financing Receivable, General Allowance, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
General CECL Allowance |  | 36,694 | 41,467 |  |
Total quarter allowances (reversals), General CECL allowance |  | (11,389) | (1,238) |  |
General CECL Allowance |  | 25,305 | 40,229 |  |
Financing Receivable, Total Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Total CECL Allowance |  | 181,694 | 216,467 |  |
Total CECL Allowance, Quarter allowances (reversals) |  | 18,611 | (1,238) |  |
Total CECL Allowance |  | $ 200,305 | $ 215,229 |  |
General CECL allowance, % of amortized cost |  | 0.32% | 0.62% | 0.49% | 0.67%
Total CECL allowance, % of amortized cost |  | 2.34% | 3.06% | 2.26% | 3.23%
Commercial Mortgage and Subordinated Portfolio Segment |  |  |  |  |
Allowance and Provision for Loan Credit Loss [Abstract] |  |  |  |  |
Beginning balance, specific CECL allowance, funded |  | $ 145,000 | $ 175,000 |  |
Quarter allowances (reversals), specific CECL allowance, funded |  | 30,000 | 0 |  |
Ending balance, specific CECL allowance, funded |  | $ 175,000 | $ 175,000 |  |
[1] | Comprised of $30,000 and $0 Specific CECL Allowance and $11,389 and $1,238 of General CECL Reversals for the three months ended March 31, 2022 and 2021, respectively.

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- Definition Allowance For Loan And Lease Losses, Including Loan Specific, Real Estate And Off-Balance Sheet, Credit Loss, Expense (Reversal) + References No definition available. + Details
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- Definition Allowance For Loan And Lease Losses, Including Loan Specific, Real Estate And Off-Balance Sheet, Credit Loss, Liability + References No definition available. + Details
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