Residential Investor Loans - Schedule unpaid principal balance of business purpose loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($) securitization_entity unit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Securitization entity | securitization_entity	2
Number of units for light to moderate renovation | unit	20
BPL bridge loans held by CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Securitization entity | securitization_entity	1
Residential Term, Single Family Rental | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 85,307
Residential Term, Multifamily | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	98,051
Term Loans, Single Family Rental | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,163,862
Term Loans, Multifamily | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	626,893
Residential Bridge Renovate Build For Rent | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	575,782
Bridge Loans, Renovate Build For Rent | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	279,820
Residential Bridge Single Asset Bridge | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	90,678
Bridge Loans, Single Asset Bridge | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	171,489
Residential Bridge Multifamily | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	664,060
Bridge Loans, Multifamily | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	147,903
Residential Bridge Third Party Originated | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	6,247
Bridge Loans, Third Party Originated | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,055
Residential Term Loans | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	183,358
Term Loans | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	2,790,755
BPL bridge loans | Redwood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	1,336,767
Bridge Loans | CAFL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans	$ 600,267