Fair Value Measurements - Change in Fair Value of Level 3 Financial Assets and Liabilities that are Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Fair Value Disclosures [Abstract] |
|
|
| Beginning balance |
$ 166,428
|
$ 51,398
|
| Net gain (loss) included in "Investment and derivative gain (loss), net" |
16,166
|
(3,514)
|
| Additions from consolidation of VIE |
|
123,680
|
| Transfers to real estate owned by consolidated VIE |
(534)
|
|
| Purchases |
157,842
|
48,229
|
| Sales |
(13,263)
|
|
| Payments, net |
(139,501)
|
(57,047)
|
| Accretion of discount |
8,629
|
3,682
|
| Ending balance |
195,767
|
166,428
|
| Net unrealized gains (losses) included in earnings for the period for Level 3 assets still held at the reporting date |
16,304
|
(3,492)
|
| Beginning balance |
576
|
0
|
| Net loss (gain) included in "Investment and derivative gain (loss), net" |
16
|
(27)
|
| Additions from consolidation of VIE |
|
559
|
| Payments, net |
(158)
|
|
| Accretion of discount |
74
|
44
|
| Ending balance |
508
|
576
|
| Net unrealized losses (gains) included in earnings for the period for Level 3 liabilities still held at the reporting date |
$ 16
|
$ (27)
|