WAREHOUSE AND CORPORATE NOTES PAYABLE - Corporate Notes Payable - Components of Notes Payable (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) loan	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
WAREHOUSE AND CORPORATE NOTES PAYABLE
Repayments of notes payable		$ 331,856	$ 8,019	$ 122,046
Unpaid principal balance		2,293,242
Carrying balance		829,218	768,044
Senior Notes
WAREHOUSE AND CORPORATE NOTES PAYABLE
Quarterly equal installments		0
Unpaid principal balance		400,000
Fair value adjustment		927
Unamortized debt issuance costs		(6,965)
Principal amount	$ 400,000
Maturity date	Apr. 01, 2033
Carrying balance		$ 393,962
Stated interest rate	6.625%	6.625%
Percentage added to reference rate		2.57%
Debt instrument, Variable interest rate, Type		us-gaap:SecuredOvernightFinancingRateSofrMember
Term Loan
WAREHOUSE AND CORPORATE NOTES PAYABLE
Repayments of notes payable	$ 328,500
Quarterly equal installments		$ 1,100	2,000
Unpaid principal balance		446,625	778,481
Unamortized debt discount		(2,688)	(3,484)
Unamortized debt issuance costs		(8,681)	(6,953)
Carrying balance		$ 435,256	768,044
Period for amounts drawn and repaid		60 days
Term Loan | Asset impairment and other expenses
WAREHOUSE AND CORPORATE NOTES PAYABLE
Writeoff of unamortized debt issuance costs	4,200
Credit Agreement | Senior Notes
WAREHOUSE AND CORPORATE NOTES PAYABLE
Stated interest rate		6.625%
Percentage added to reference rate		2.57%
Debt instrument, Variable interest rate, Type		us-gaap:SecuredOvernightFinancingRateSofrMember
Credit Agreement | Term Loan
WAREHOUSE AND CORPORATE NOTES PAYABLE
Principal amount			$ 800,000
Restated Credit Agreement
WAREHOUSE AND CORPORATE NOTES PAYABLE
Amount for incremental loans	$ 325,000
Percentage of consolidated adjusted EBITDA	100.00%
Restated Credit Agreement | Maximum
WAREHOUSE AND CORPORATE NOTES PAYABLE
Consolidated net secured leverage ratio	3
Restated Credit Agreement | Restated Term Loan
WAREHOUSE AND CORPORATE NOTES PAYABLE
Principal amount	$ 450,000
Percentage added to reference rate	2.00%
Debt instrument, Variable interest rate, Type	us-gaap:SecuredOvernightFinancingRateSofrMember
Interest margin step down on debt instrument	0.25%
Number of incremental loans | loan	1
Percentage of principal amount required as quarterly installment	0.25%
Restated Credit Agreement | Restated Term Loan | Maximum
WAREHOUSE AND CORPORATE NOTES PAYABLE
Consolidated net secured leverage ratio	2
Restated Credit Agreement | Revolving Credit Facility
WAREHOUSE AND CORPORATE NOTES PAYABLE
Principal amount	$ 50,000
Number of incremental loans | loan	1