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Fair Value, Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Financial assets: |  |  |  |
Loans and investments, net | $ 11,981,048 | $ 5,285,868 | $ 4,189,960 | $ 3,200,145
Loans held-for-sale, net | 1,077,239 | 968,595 |  |
Securities held-to-maturity, net | 140,484 | 95,524 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities, Carrying value | 4,481,579 | 2,234,883 |  |
Collateralized loan obligations | 5,892,810 | 2,517,309 |  |
Senior unsecured notes | 1,280,545 | 662,843 |  |
Convertible senior unsecured notes, net | 259,385 | 267,973 |  |
Junior subordinated notes | 142,382 | 141,656 |  |
Level 1 |  |  |  |
Financial liabilities: |  |  |  |
Senior unsecured notes | 1,301,708 |  |  |
Level 2 |  |  |  |
Financial assets: |  |  |  |
Loans held-for-sale, net | 1,097,699 |  |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities, Carrying value | 956,272 |  |  |
Convertible senior unsecured notes, net | 294,690 |  |  |
Level 3 |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 12,181,194 |  |  |
Loans held-for-sale, net | 19,386 |  |  |
Capitalized mortgage servicing rights, net | 477,323 |  |  |
Securities held-to-maturity, net | 149,911 |  |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities, Carrying value | 3,527,835 |  |  |
Collateralized loan obligations | 5,914,453 |  |  |
Junior subordinated notes | 101,698 |  |  |
Carrying Value |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 11,981,048 | 5,285,868 |  |
Loans held-for-sale, net | 1,093,609 | 986,919 |  |
Capitalized mortgage servicing rights, net | 422,734 |  |  |
Securities held-to-maturity, net | 140,484 | 95,524 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities, Carrying value | 4,481,579 | 2,234,883 |  |
Collateralized loan obligations | 5,892,810 | 2,517,309 |  |
Senior unsecured notes | 1,280,545 | 662,843 |  |
Convertible senior unsecured notes, net | 259,385 | 267,973 |  |
Junior subordinated notes | 142,382 | 141,656 |  |
Estimated Fair Value Disclosure |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 12,181,194 | 5,428,141 |  |
Loans held-for-sale, net | 1,117,085 | 1,007,294 |  |
Capitalized mortgage servicing rights, net | 477,323 |  |  |
Securities held-to-maturity, net | 149,911 | 94,128 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities, Carrying value | 4,484,107 | 2,235,668 |  |
Collateralized loan obligations | 5,914,453 | 2,495,195 |  |
Senior unsecured notes | 1,301,708 | 670,117 |  |
Convertible senior unsecured notes, net | 294,690 | 280,636 |  |
Junior subordinated notes | $ 101,698 | $ 99,594 |  |

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