Securitizations, Net - Summary of Investor Real Estate Loans Securitized, and Securities Issued, Ownership Retained by the Company (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Securities issued	$ 4,820,036
Securities retained as of issuance date	468,076
Securities retained	236,515	$ 206,515
2015-1 Trust
Debt Instrument [Line Items]
Securities issued	285,457
Securities retained as of issuance date	$ 27,372
Securities retained		15,526
Stated maturity date	2045-07
2016-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 319,809
Securities retained as of issuance date	38,792
Securities retained	$ 17,541	17,633
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	$ 2,697	4,064
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	$ 2,065	2,849
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	$ 4,352	6,608
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	6,180
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	5,922
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	4,799
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	8,678
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
2020-MC1 Trust
Debt Instrument [Line Items]
Securities issued	$ 179,371
Securities retained as of issuance date	$ 96,585
Securities retained		108,891
Stated maturity date	2050-07
2021-1 Trust
Debt Instrument [Line Items]
Securities issued	$ 251,301
Securities retained as of issuance date	13,227
Securities retained	$ 10,120	$ 12,518
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	$ 4,718
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	$ 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	$ 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	$ 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	$ 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	$ 65,141
Stated maturity date	2052-10