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Equity Compensation Plans - Unrecognized Compensation Cost (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of period	$ 40,188
Equity grants	9,379
Performance-based valuation adjustment	(3,205)
Equity grant forfeitures	(1,807)
Equity compensation expense	(14,535)
Unrecognized Compensation Cost at End of Period	30,020
Redwood Incentive Plan | Restricted Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of period	5,068
Equity grants	2,092
Performance-based valuation adjustment	0
Equity grant forfeitures	(1,088)
Equity compensation expense	(2,411)
Unrecognized Compensation Cost at End of Period	3,661
Redwood Incentive Plan | Deferred Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of period	19,849
Equity grants	6,865
Performance-based valuation adjustment	0
Equity grant forfeitures	(719)
Equity compensation expense	(8,911)
Unrecognized Compensation Cost at End of Period	17,084
Redwood Incentive Plan | Performance Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of period	15,271
Equity grants	0
Performance-based valuation adjustment	(3,205)
Equity grant forfeitures	0
Equity compensation expense	(2,895)
Unrecognized Compensation Cost at End of Period	9,171
Employee Stock Purchase Plan
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of period	0
Equity grants	422
Performance-based valuation adjustment	0
Equity grant forfeitures	0
Equity compensation expense	(318)
Unrecognized Compensation Cost at End of Period	$ 104

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- Definition

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- Definition

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- Definition

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Valuation Adjustment

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- Definition

Amount of cost capitalized for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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