Equity Compensation Plans - Schedule of Activities of Equity Compensation Costs by Award Type (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of year	$ 37,605
Equity grants	25,755
Performance-based valuation adjustment	(1,626)
Equity grant forfeitures	(1,928)
Equity compensation expense	(19,352)
Unrecognized Compensation Cost at End of Year	40,454
Restricted Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized Compensation Cost at End of Year	7,000
Deferred Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized Compensation Cost at End of Year	18,000
Performance Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized Compensation Cost at End of Year	16,000
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 year	3,166
Equity grants	7,047
Performance-based valuation adjustment	0
Equity grant forfeitures	(781)
Equity compensation expense	(2,448)
Unrecognized Compensation Cost at End of Year	6,984
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 year	18,920
Equity grants	10,559
Performance-based valuation adjustment	0
Equity grant forfeitures	(1,147)
Equity compensation expense	(10,702)
Unrecognized Compensation Cost at End of Year	17,630
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 year	15,519
Equity grants	7,942
Performance-based valuation adjustment	(1,626)
Equity grant forfeitures	0
Equity compensation expense	(5,995)
Unrecognized Compensation Cost at End of Year	15,840
Employee Stock Purchase Plan
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of year	0
Equity grants	207
Performance-based valuation adjustment	0
Equity grant forfeitures	0
Equity compensation expense	(207)
Unrecognized Compensation Cost at End of Year	$ 0