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Loans and Investments - Charge-offs and Recoveries Narratives (Details) $ in Thousands | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) loan | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) loan | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($)
Loans and Investments |  |  |  |  |  |
Number of loans for which no provision for loan loss made | loan | 0 |  | 0 |  |  |
Allowance for credit losses | $ 138,447 | $ 147,300 | $ 148,329 | $ 152,811 | $ 142,252 | $ 152,811
Unfunded commitments related to structured loans and investments | $ 524,700 |  | 353,800 |  |  |
Six loans collateralized by a land development project | Maturity date of March 2020 |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |
Number of loans with unpaid principal balance | loan | 6 |  |  |  |  |
Unpaid principal balance on loans | $ 121,300 |  |  |  |  |
Five loans collateralized by a land development project | Maturity date of March 2020 |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |
Number of loans with unpaid principal balance | loan | 5 |  |  |  |  |
Unpaid principal balance on loans | $ 112,000 |  |  |  |  |
Weighted average accrual rate of interest (as a percent) | 7.91% |  |  |  |  |
Allowance for credit losses | $ 71,400 |  | 71,400 |  |  |
Hotel |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |
Allowance for credit losses | $ 225 | $ 7,754 | $ 7,759 | $ 7,672 | $ 7,528 |

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