Residential Loans - Loan Product Type and Accompanying Loan Characteristics of Residential Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	669	1,484
Total Principal	$ 524,928	$ 1,034,284
30-89 Days DQ	1,650	559
90 Days DQ	747	$ 747
Residential loans, held-for-investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
90 Days DQ	$ 153,319
Residential loans, held-for-investment | Fixed loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.88%
Residential loans, held-for-sale, at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
90 Days DQ	$ 747
Residential loans, held-for-sale, at fair value | Fixed loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	554	1,376
Total Principal	$ 433,045	$ 947,140
30-89 Days DQ	1,650	559
90 Days DQ	$ 747	747
Residential loans, held-for-sale, at fair value | Fixed loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.20%
Residential loans, held-for-sale, at fair value | Fixed loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.13%
Residential loans, held-for-sale, at fair value | Fixed loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	2	6
Total Principal	$ 481	$ 1,180
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Fixed loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.88%	4.38%
Residential loans, held-for-sale, at fair value | Fixed loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.13%	5.75%
Residential loans, held-for-sale, at fair value | Fixed loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	13	188
Total Principal	$ 6,234	$ 88,204
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Fixed loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.63%	3.13%
Residential loans, held-for-sale, at fair value | Fixed loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.50%	6.38%
Residential loans, held-for-sale, at fair value | Fixed loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	301	788
Total Principal	$ 186,251	$ 475,935
30-89 Days DQ	0	559
90 Days DQ	$ 747	$ 747
Residential loans, held-for-sale, at fair value | Fixed loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.20%	3.75%
Residential loans, held-for-sale, at fair value | Fixed loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.88%	7.00%
Residential loans, held-for-sale, at fair value | Fixed loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	161	295
Total Principal	$ 139,786	$ 255,429
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Fixed loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.50%	3.25%
Residential loans, held-for-sale, at fair value | Fixed loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.50%	6.63%
Residential loans, held-for-sale, at fair value | Fixed loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	77	99
Total Principal	$ 100,293	$ 126,392
30-89 Days DQ	1,650	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Fixed loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.20%	3.75%
Residential loans, held-for-sale, at fair value | Fixed loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.00%	6.13%
Residential loans, held-for-sale, at fair value | ARM loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	2
90 Days DQ	$ 0
Residential loans, held-for-sale, at fair value | ARM loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.38%
Residential loans, held-for-sale, at fair value | ARM loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.50%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	115	108
Total Principal	$ 91,883	$ 87,144
30-89 Days DQ	0	0
90 Days DQ	$ 0	0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.00%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.00%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0
Loan Balance, maximum	$ 250
Number of Loans | loan	7
Total Principal	$ 1,254
30-89 Days DQ	0
90 Days DQ	$ 0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.20%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.00%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	1	8
Total Principal	$ 432	$ 3,795
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.25%	3.88%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.25%	5.38%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	52	50
Total Principal	$ 33,611	$ 31,759
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.00%	3.63%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.50%	7.38%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	33	27
Total Principal	$ 28,573	$ 23,478
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.25%	3.88%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.88%	5.25%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	22	23
Total Principal	$ 28,013	$ 28,112
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.25%	3.50%
Residential loans, held-for-sale, at fair value | Hybrid ARM loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.25%	5.50%
Legacy Sequoia | Residential loans, held-for-investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	2,198	2,641
Total Principal	$ 424,830	$ 545,209
30-89 Days DQ	15,739	16,291
90 Days DQ	$ 9,803	$ 13,955
Legacy Sequoia | Residential loans, held-for-investment | ARM loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	2,186	2,620
Total Principal	$ 419,399	$ 535,743
30-89 Days DQ	15,739	16,291
90 Days DQ	$ 9,803	13,955
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.25%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.00%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	1,685	1,988
Total Principal	$ 169,230	$ 206,490
30-89 Days DQ	5,135	7,179
90 Days DQ	$ 3,109	$ 3,952
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.38%	1.25%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.00%	5.50%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	345	424
Total Principal	$ 120,261	$ 148,154
30-89 Days DQ	6,149	5,989
90 Days DQ	$ 3,835	$ 4,368
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.25%	1.25%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.63%	5.63%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	87	110
Total Principal	$ 53,811	$ 67,471
30-89 Days DQ	3,628	1,309
90 Days DQ	$ 1,211	$ 1,880
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.63%	1.63%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.38%	4.50%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	45	61
Total Principal	$ 37,756	$ 51,918
30-89 Days DQ	827	791
90 Days DQ	$ 1,648	$ 2,561
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.63%	1.63%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.38%	4.38%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	24	37
Total Principal	$ 38,341	$ 61,710
30-89 Days DQ	0	1,023
90 Days DQ	$ 0	$ 1,194
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	1.63%	1.63%
Legacy Sequoia | Residential loans, held-for-investment | ARM loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.00%	4.38%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	12	21
Total Principal	$ 5,431	$ 9,466
30-89 Days DQ	0	0
90 Days DQ	$ 0	0
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.63%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.13%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	2	4
Total Principal	$ 465	$ 769
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.25%	4.63%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	5.00%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	7	10
Total Principal	$ 2,494	$ 3,675
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.63%	2.63%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.13%	4.88%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	2	6
Total Principal	$ 1,181	$ 3,667
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	4.38%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	5.00%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	1	1
Total Principal	$ 1,291	$ 1,355
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	4.88%
Legacy Sequoia | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	4.88%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	3,156	2,800
Total Principal	$ 2,240,680	$ 2,041,010
30-89 Days DQ	24,266	10,789
90 Days DQ	$ 6,756	1,905
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.75%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	56	29
Total Principal	$ 10,743	$ 5,484
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.75%	2.75%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.50%	5.63%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	420	336
Total Principal	$ 184,455	$ 149,917
30-89 Days DQ	2,282	1,419
90 Days DQ	$ 0	$ 925
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.13%	3.13%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.13%	6.13%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	1,528	1,363
Total Principal	$ 940,914	$ 841,692
30-89 Days DQ	13,020	3,633
90 Days DQ	$ 2,366	$ 0
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.13%	3.13%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%	6.38%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	835	761
Total Principal	$ 719,609	$ 659,845
30-89 Days DQ	7,856	3,549
90 Days DQ	$ 3,297	$ 980
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.25%	3.25%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.50%	6.50%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	317	311
Total Principal	$ 384,959	$ 384,072
30-89 Days DQ	1,108	2,188
90 Days DQ	$ 1,093	$ 0
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.50%	3.13%
Sequoia Choice | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.88%	5.88%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	14,502	7,900
Total Principal	$ 2,428,034	$ 1,310,974
30-89 Days DQ	785,132	198,945
90 Days DQ	$ 135,175	50,528
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	11.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	11,639	6,404
Total Principal	$ 1,501,538	$ 830,118
30-89 Days DQ	477,592	130,608
90 Days DQ	$ 79,632	$ 30,686
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.00%	2.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	11.00%	10.50%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	2,805	1,469
Total Principal	$ 894,125	$ 466,222
30-89 Days DQ	297,732	66,706
90 Days DQ	$ 52,920	$ 19,319
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.00%	2.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.75%	7.38%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	57	27
Total Principal	$ 31,350	$ 14,634
30-89 Days DQ	8,787	1,631
90 Days DQ	$ 2,623	$ 523
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.00%	2.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%	5.88%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, maximum	$ 1,000
Number of Loans | loan	1
Total Principal	$ 1,021
30-89 Days DQ	1,021
90 Days DQ	$ 0
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.00%
Freddie Mac SLST | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.00%
Redwood | Residential loans, held-for-investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	2,940	3,296
Total Principal	$ 2,052,778	$ 2,385,330
30-89 Days DQ	12,221	6,086
90 Days DQ	$ 1,585	$ 1,224
Redwood | Residential loans, held-for-investment | Fixed loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	2,641	2,911
Total Principal	$ 1,825,379	$ 2,081,764
30-89 Days DQ	7,645	4,223
90 Days DQ	$ 614	1,224
Redwood | Residential loans, held-for-investment | Fixed loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.75%
Redwood | Residential loans, held-for-investment | Fixed loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	38	36
Total Principal	$ 6,549	$ 6,737
30-89 Days DQ	223	0
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.90%	3.30%
Redwood | Residential loans, held-for-investment | Fixed loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.80%	5.08%
Redwood | Residential loans, held-for-investment | Fixed loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	676	679
Total Principal	$ 287,984	$ 292,730
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.75%	2.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.00%	5.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	1,091	1,213
Total Principal	$ 669,159	$ 746,503
30-89 Days DQ	2,325	1,320
90 Days DQ	$ 614	$ 1,224
Redwood | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.80%	2.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%	6.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	519	599
Total Principal	$ 447,499	$ 517,075
30-89 Days DQ	1,895	903
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Fixed loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.75%	2.75%
Redwood | Residential loans, held-for-investment | Fixed loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.63%	6.13%
Redwood | Residential loans, held-for-investment | Fixed loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	317	384
Total Principal	$ 414,188	$ 518,719
30-89 Days DQ	3,202	2,000
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.00%	2.80%
Redwood | Residential loans, held-for-investment | Fixed loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate		5.88%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans | loan	299	385
Total Principal	$ 227,399	$ 303,566
30-89 Days DQ	4,576	1,863
90 Days DQ	$ 971	0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.875%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.00%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 0	0
Loan Balance, maximum	$ 250	$ 250
Number of Loans | loan	12	12
Total Principal	$ 2,423	$ 2,190
30-89 Days DQ	0	59
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.50%	2.88%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $0 to $250 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.50%	4.88%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 251	$ 251
Loan Balance, maximum	$ 500	$ 500
Number of Loans | loan	51	59
Total Principal	$ 20,781	$ 23,986
30-89 Days DQ	0	0
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.25%	2.63%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $251 to $500 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.63%	5.75%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 501	$ 501
Loan Balance, maximum	$ 750	$ 750
Number of Loans | loan	97	116
Total Principal	$ 61,708	$ 73,360
30-89 Days DQ	1,364	692
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.88%	2.88%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $501 to $750 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.13%	5.75%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $751 to $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, minimum	$ 751	$ 751
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	90	129
Total Principal	$ 77,550	$ 111,879
30-89 Days DQ	1,784	0
90 Days DQ	$ 971	$ 0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $751 to $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	2.88%	2.88%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | $751 to $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.00%	6.38%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan Balance, maximum	$ 1,000	$ 1,000
Number of Loans | loan	49	69
Total Principal	$ 64,937	$ 92,151
30-89 Days DQ	1,428	1,112
90 Days DQ	$ 0	$ 0
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000 | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	3.00%	3.00%
Redwood | Residential loans, held-for-investment | Hybrid ARM loans | Over $1,000 | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.50%	5.50%