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Loans and Investments - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Sep. 30, 2019
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | $ 147,300 | $ 142,252 | $ 148,329 |  |  |
Provision for loan losses (net of recoveries) | (8,853) | 10,559 | (9,882) | $ 64,448 |  |
Allowance at end of period | 138,447 | 152,811 | 138,447 | 152,811 |  |
Allowance for credit losses | 138,447 | 152,811 | 138,447 | 152,811 | $ 148,329 | $ 152,811
Accrued interest receivable related to loans | 52,900 |  | 52,900 |  | 41,600 |
As Reported Pre-Adoption |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 71,069 |  |
Allowance for credit losses |  |  |  |  |  |
Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 17,294 |  |
Allowance for credit losses |  |  |  |  |  |
Land |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 78,096 | 78,418 | 78,150 |  |  |
Provision for loan losses (net of recoveries) | (39) | (324) | (93) | 10,148 |  |
Allowance at end of period | 78,057 | 78,094 | 78,057 | 78,094 |  |
Allowance for credit losses | 78,057 | 78,094 | 78,057 | 78,094 | 78,150 |
Land | As Reported Pre-Adoption |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 67,869 |  |
Allowance for credit losses |  |  |  |  |  |
Land | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 77 |  |
Allowance for credit losses |  |  |  |  |  |
Multifamily |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 30,029 | 31,891 | 36,468 |  |  |
Provision for loan losses (net of recoveries) | 131 | 2,715 | (6,308) | 18,284 |  |
Allowance at end of period | 30,160 | 34,606 | 30,160 | 34,606 |  |
Allowance for credit losses | 30,160 | 34,606 | 30,160 | 34,606 | 36,468 |
Multifamily | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 16,322 |  |
Allowance for credit losses |  |  |  |  |  |
Retail |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 13,848 | 11,322 | 13,861 |  |  |
Provision for loan losses (net of recoveries) | (29) | 2,659 | (42) | 13,646 |  |
Allowance at end of period | 13,819 | 13,981 | 13,819 | 13,981 |  |
Allowance for credit losses | 13,819 | 13,981 | 13,819 | 13,981 | 13,861 |
Retail | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 335 |  |
Allowance for credit losses |  |  |  |  |  |
Office |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 8,051 | 6,096 | 1,846 |  |  |
Provision for loan losses (net of recoveries) | (229) | 2,436 | 5,976 | 6,745 |  |
Allowance at end of period | 7,822 | 8,532 | 7,822 | 8,532 |  |
Allowance for credit losses | 7,822 | 8,532 | 7,822 | 8,532 | 1,846 |
Office | As Reported Pre-Adoption |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 1,500 |  |
Allowance for credit losses |  |  |  |  |  |
Office | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 287 |  |
Allowance for credit losses |  |  |  |  |  |
Healthcare |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 3,872 | 3,934 | 3,880 |  |  |
Provision for loan losses (net of recoveries) | (6) | (4) | (14) | 3,866 |  |
Allowance at end of period | 3,866 | 3,930 | 3,866 | 3,930 |  |
Allowance for credit losses | 3,866 | 3,930 | 3,866 | 3,930 | 3,880 |
Healthcare | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 64 |  |
Allowance for credit losses |  |  |  |  |  |
Student Housing |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 3,498 | 1,142 | 4,078 |  |  |
Provision for loan losses (net of recoveries) | (1,133) | 2,968 | (1,713) | 4,042 |  |
Allowance at end of period | 2,365 | 4,110 | 2,365 | 4,110 |  |
Allowance for credit losses | 2,365 | 4,110 | 2,365 | 4,110 | 4,078 |
Student Housing | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 68 |  |
Allowance for credit losses |  |  |  |  |  |
Hotel |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 7,754 | 7,528 | 7,759 |  |  |
Provision for loan losses (net of recoveries) | (7,529) | 144 | (7,534) | 7,643 |  |
Allowance at end of period | 225 | 7,672 | 225 | 7,672 |  |
Allowance for credit losses | 225 | 7,672 | 225 | 7,672 | 7,759 |
Hotel | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 29 |  |
Allowance for credit losses |  |  |  |  |  |
Other |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period | 2,152 | 1,921 | 2,287 |  |  |
Provision for loan losses (net of recoveries) | (19) | (35) | (154) | 74 |  |
Allowance at end of period | 2,133 | 1,886 | 2,133 | 1,886 |  |
Allowance for credit losses | $ 2,133 | 1,886 | $ 2,133 | 1,886 | $ 2,287 |
Other | As Reported Pre-Adoption |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | 1,700 |  |
Allowance for credit losses |  |  |  |  |  |
Other | Impact of adopting CECL |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  |  |  | $ 112 |  |
Allowance for credit losses |  |  |  |  |  |
Bridge loans | Hotel |  |  |  |  |  |
Changes in allowance for loan losses |  |  |  |  |  |
Allowance at beginning of period |  | $ 7,500 |  |  |  |
Allowance for credit losses |  |  |  |  |  |

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