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Subsequent Events (Details) $ in Thousands, € in Millions, £ in Millions | Feb. 08, 2022 USD ($) | Feb. 08, 2022 GBP (£) | Feb. 08, 2022 EUR (€) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Subsequent Event [Line Items] |  |  |  |  |  |
Total carrying value, net |  |  |  |  | $ 7,857,260 | $ 6,496,977
Commercial Mortgage Portfolio Segment |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Total carrying value, net | [1],[2] |  |  |  | $ 7,012,312 | $ 5,451,084
Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Proceeds from loan repayments |  | $ 484,800 |  |  |  |
Subsequent Event | Commercial Mortgage Portfolio Segment | First Mortgage | Warehouse/United Kingdom |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Mortgage loans on real estate, funded amount of mortgages |  | 106,200 | £ 78.8 |  |  |
Subsequent Event | Commercial Mortgage Portfolio Segment | First Mortgage | Office/Milan, Italy |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Mortgage loans on real estate, funded amount of mortgages |  | 160,000 |  | € 141.6 |  |
Total carrying value, net |  | 167,000 |  | € 147.7 |  |
Funded amount of mortgages |  | $ 59,500 |  |  |  |
[1] | Includes $5,957,707 and $5,418,999 pledged as collateral under secured debt arrangements in 2021 and 2020, respectively.
[2] | Net of $178,588 and $213,102 CECL Allowances in 2021 and 2020, respectively, comprised of $145,000 a nd $175,000 Specific CECL Allowance and $33,588 and $38,102 General CECL Allowance, respectively.

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- Definition Mortgage Loans on Real Estate, Funded Amount of Mortgages For Previously Closed Loans + References No definition available. + Details
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition The cash inflow from repayments of the balance excluding interest (principal) on loans receivable and leases held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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