Securitized Debt and Securitized Debt at Fair Value - Summary of Investor Real Estate Loans Securitized, and Securities Issued, Ownership Retained by the Company (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Securities issued	$ 5,340,205
Securities retained as of issuance date	535,806
Securities retained	275,711	$ 236,515
2016-1 Trust
Debt Instrument [Line Items]
Securities issued	319,809
Securities retained as of issuance date	$ 38,792
Securities retained		17,541
Stated maturity date	2046-04
2017-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 245,601
Securities retained as of issuance date	12,927
Securities retained	$ 2,416	2,697
Stated maturity date	2047-10
2018-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 176,816
Securities retained as of issuance date	9,308
Securities retained	$ 1,602	2,065
Stated maturity date	2048-04
2018-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 307,988
Securities retained as of issuance date	16,210
Securities retained	$ 3,614	4,352
Stated maturity date	2048-10
2019-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 235,580
Securities retained as of issuance date	$ 12,399
Securities retained		4,178
Stated maturity date	2049-03
2019-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 207,020
Securities retained as of issuance date	$ 10,901
Securities retained		4,007
Stated maturity date	2049-07
2019-3 Trust
Debt Instrument [Line Items]
Securities issued	$ 154,419
Securities retained as of issuance date	$ 8,127
Securities retained		3,281
Stated maturity date	2049-10
2020-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 248,700
Securities retained as of issuance date	$ 13,159
Securities retained		6,746
Stated maturity date	2050-02
2020-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 96,352
Securities retained as of issuance date	32,118
Securities retained	$ 12,847	12,847
Stated maturity date	2050-06
2021-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 251,301
Securities retained as of issuance date	$ 13,227
Securities retained		10,120
Stated maturity date	2051-05
2021-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 194,918
Securities retained as of issuance date	$ 10,260
Stated maturity date	2051-08
2021-3 Trust
Debt Instrument [Line Items]
Securities issued	$ 204,205
Stated maturity date	2051-10
2021-4 Trust
Debt Instrument [Line Items]
Securities issued	$ 319,116
Stated maturity date	2051-12
2022-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 273,594
Securities retained as of issuance date	5,015
Securities retained	$ 4,206	4,718
Stated maturity date	2052-02
2022-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 241,388
Securities retained as of issuance date	11,202
Securities retained	$ 10,971	11,170
Stated maturity date	2052-03
2022-MC1 Trust
Debt Instrument [Line Items]
Securities issued	$ 84,967
Securities retained as of issuance date	40,911
Securities retained	$ 45,026	44,038
Stated maturity date	2047-05
2022-3 Trust
Debt Instrument [Line Items]
Securities issued	$ 296,323
Securities retained as of issuance date	18,914
Securities retained	$ 15,489	18,587
Stated maturity date	2052-05
2022-4 Trust
Debt Instrument [Line Items]
Securities issued	$ 308,357
Securities retained as of issuance date	25,190
Securities retained	$ 13,414	25,027
Stated maturity date	2052-07
2022-5 Trust
Debt Instrument [Line Items]
Securities issued	$ 188,754
Securities retained as of issuance date	65,459
Securities retained	$ 12,649	$ 65,141
Stated maturity date	2052-10
2023-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 198,715
Securities retained as of issuance date	41,593
Securities retained	$ 4,043
Stated maturity date	2052-12
2023-1R Trust
Debt Instrument [Line Items]
Securities issued	$ 64,833
Securities retained as of issuance date	66,228
Securities retained	$ 66,228
Stated maturity date	2025-10
2023-2 Trust
Debt Instrument [Line Items]
Securities issued	$ 202,210
Securities retained as of issuance date	24,229
Securities retained	$ 23,948
Stated maturity date	2053-04
2023-RTL1 Trust
Debt Instrument [Line Items]
Securities issued	$ 81,608
Securities retained as of issuance date	4,296
Securities retained	$ 4,296
Stated maturity date	2028-07
2023-3 Trust
Debt Instrument [Line Items]
Securities issued	$ 234,741
Securities retained as of issuance date	28,718
Securities retained	$ 28,480
Stated maturity date	2053-07
2023-4 Trust
Debt Instrument [Line Items]
Securities issued	$ 202,890
Securities retained as of issuance date	26,623
Securities retained	$ 26,482
Stated maturity date	2053-11