Loans Held for Investment at Amortized Cost and Loans Held for Investment at Fair Value - Schedule of Loans Held for Investment Pledged as Collateral for Warehouse Facilities and Securitized Debt Issued (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Accounts Notes And Loans Receivable [Line Items]
Total	$ 6,351,218	$ 6,050,646
Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	413,136	410,953
2013 Repurchase Agreement \| Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	111,610	165,484
2021/2024 Repurchase Agreements \| Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	133,621	134,901
2021 Term Repurchase Agreement \| Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	12,167	23,478
2023 Repurchase Agreement \| Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	120,791	50,611
2024 Bank Credit Agreement \| Asset Pledged as Collateral Without Right
Accounts Notes And Loans Receivable [Line Items]
Total pledged loans	34,947	36,479
2017-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	26,411	29,111
2018-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	19,753	21,618
2018-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	45,902	49,759
2019-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	49,259	58,324
2019-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	38,529	42,618
2019-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	37,881	41,166
2020-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	78,439	83,154
2021-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	125,518	135,627
2021-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	102,347	112,332
2021-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	110,908	119,070
2021-4 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	180,411	190,186
2022-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	188,317	198,203
2022-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	170,640	178,346
2022-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	184,091	206,020
2022-4 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	180,716	221,652
2022-5 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	112,284	146,126
2023-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	108,741	141,805
2023-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	82,361	94,269
2023-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	101,386	124,129
2023-4 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	91,550	118,953
2024-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	106,529	140,464
2024-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	154,392	183,376
2024-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	128,624	145,659
2024-4 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	158,410	175,820
2024-5 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	183,833	246,456
2024-6 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	238,620	268,354
2025-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	289,926	321,431
2025-RTL1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	99,591	117,733
2025-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	348,588	369,814
2025-MC1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	74,617	86,083
2025-3 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	347,309	377,229
2025-P1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	178,599	190,012
2025-4 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	442,123	459,557
2025-P2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	197,181	210,368
2025-5 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	426,623	$ 445,822
2026-1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	344,703
2026-P1 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	187,994
2026-2 Trust
Accounts Notes And Loans Receivable [Line Items]
Total	$ 408,112

Loans Held for Investment at Amortized Cost and Loans Held for Investment at Fair Value - Schedule of Loans Held for Investment Pledged as Collateral for Warehouse Facilities and Securitized Debt Issued (Details) - USD ($)
$ in Thousands