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Loans and Investments - Investment Portfolio and Concentration of Credit Risk (Details) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) loan property | Dec. 31, 2020 USD ($) loan property | Mar. 31, 2021 USD ($) loan | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Loans and Investments |  |  |  |  |
Loans and investments, gross | $ 12,158,995 | $ 5,475,082 |  |  |
Allowance for credit losses | (113,241) | (148,329) |  | $ (71,069) |
Unearned revenue | (64,706) | (40,885) |  |  |
Loans and investments, net | $ 11,981,048 | $ 5,285,868 |  | $ 4,189,960 | $ 3,200,145
Percent of Total | 100.00% | 100.00% |  |  |
Loan Count | loan | 580 | 328 |  |  |
Wtd. Avg. Pay Rate (as a percent) | 4.26% | 5.23% |  |  |
Wtd. Avg. Remaining Months to Maturity | 24 months 18 days | 19 months 6 days |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 1.00% | 4.00% |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 76.00% | 77.00% |  |  |
Single-Family Rental |  |  |  |  |
Loans and Investments |  |  |  |  |
Transfer of fixed rate SFR from Structured Business to Agency Business | loan |  |  | 21 |  |
Transfer of UPB from Structured Business To Agency Business |  |  | $ 65,200 |  |
Credit risk concentration |  |  |  |  |
Loans and Investments |  |  |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 1.00% |  |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 76.00% |  |  |  |
Credit risk concentration | Single-Family Rental |  |  |  |  |
Loans and Investments |  |  |  |  |
Percent of Total | 4.00% |  |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 0.00% |  |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 65.00% |  |  |  |
Total assets | Credit risk concentration |  |  |  |  |
Loans and Investments |  |  |  |  |
Loan Count | loan | 31 | 22 |  |  |
Number of different borrowers | property | 5 | 5 |  |  |
Concentration Risk Threshold Percentage | 11 | 12 |  |  |
Bridge Loans |  |  |  |  |
Loans and Investments |  |  |  |  |
Loans and investments, gross | $ 11,750,710 | $ 5,022,509 |  |  |
Percent of Total | 97.00% | 92.00% |  |  |
Loan Count | loan | 528 | 263 |  |  |
Wtd. Avg. Pay Rate (as a percent) | 4.19% | 5.09% |  |  |
Wtd. Avg. Remaining Months to Maturity | 23 months 24 days | 16 months 6 days |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 0.00% | 0.00% |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 76.00% | 76.00% |  |  |
Bridge Loans | Single-Family Rental |  |  |  |  |
Loans and Investments |  |  |  |  |
Number of loans under the loan portfolio | loan | 120 | 38 |  |  |
Total loan commitment | $ 804,600 | $ 309,200 |  |  |
Mezzanine Loans |  |  |  |  |
Loans and Investments |  |  |  |  |
Loans and investments, gross | $ 223,378 | $ 159,242 |  |  |
Percent of Total | 2.00% | 3.00% |  |  |
Loan Count | loan | 39 | 29 |  |  |
Wtd. Avg. Pay Rate (as a percent) | 7.32% | 7.40% |  |  |
Wtd. Avg. Remaining Months to Maturity | 56 months 9 days | 45 months |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 34.00% | 32.00% |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 84.00% | 82.00% |  |  |
Preferred equity investments |  |  |  |  |
Loans and Investments |  |  |  |  |
Loans and investments, gross | $ 155,513 | $ 224,928 |  |  |
Percent of Total | 1.00% | 4.00% |  |  |
Loan Count | loan | 11 | 14 |  |  |
Wtd. Avg. Pay Rate (as a percent) | 5.57% | 7.07% |  |  |
Wtd. Avg. Remaining Months to Maturity | 38 months | 49 months 24 days |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 58.00% | 64.00% |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 87.00% | 89.00% |  |  |
Other loans |  |  |  |  |
Loans and Investments |  |  |  |  |
Loans and investments, gross | $ 29,394 | $ 68,403 |  |  |
Percent of Total | 1.00% | 1.00% |  |  |
Loan Count | loan | 2 | 22 |  |  |
Wtd. Avg. Pay Rate (as a percent) | 4.63% | 4.95% |  |  |
Wtd. Avg. Remaining Months to Maturity | 48 months 3 days | 74 months 24 days |  |  |
Wtd. Avg. First Dollar LTV Ratio (as percent) | 0.00% | 0.00% |  |  |
Wtd. Avg. Last Dollar LTV Ratio (as percent) | 67.00% | 69.00% |  |  |
Other loans | Single-Family Rental |  |  |  |  |
Loans and Investments |  |  |  |  |
Number of loans under the loan portfolio | loan | 2 | 22 |  |  |
Unpaid principal balance, funded | $ 408,200 | $ 88,100 |  |  |

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- Definition Represents the weighted average First Dollar LTV Ratio that is calculated by comparing the total of the company's senior most dollar and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will absorb a total loss of its position. + References No definition available. + Details
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