Equity Compensation Plans - Schedule of Activities of Equity Compensation Costs by Award Type (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized compensation cost at beginning of year	$ 40,454
Equity grants	22,257
Performance-based valuation adjustment	(10,828)
Equity grant forfeitures	(997)
Equity compensation expense	(16,514)
Unrecognized Compensation Cost at End of Year	34,372
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	19,000
Performance Stock Units
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Roll Forward]
Unrecognized Compensation Cost at End of Year	9,000
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	6,984
Equity grants	4,913
Performance-based valuation adjustment	0
Equity grant forfeitures	(450)
Equity compensation expense	(4,265)
Unrecognized Compensation Cost at End of Year	7,182
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	17,630
Equity grants	12,247
Performance-based valuation adjustment	0
Equity grant forfeitures	(547)
Equity compensation expense	(10,739)
Unrecognized Compensation Cost at End of Year	18,591
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	15,840
Equity grants	4,912
Performance-based valuation adjustment	(10,828)
Equity grant forfeitures	0
Equity compensation expense	(1,325)
Unrecognized Compensation Cost at End of Year	8,599
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	185
Performance-based valuation adjustment	0
Equity grant forfeitures	0
Equity compensation expense	(185)
Unrecognized Compensation Cost at End of Year	$ 0