Repurchase Agreements and Warehouse Facilities - Schedule of Borrowings Under Financing Arrangements and Associated Assets Pledged as Collateral (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Outstanding Repurchase Agreements or Warehouse Facilities	$ 6,214,069	$ 6,154,086
Carrying Value of Repurchase Agreements and Warehouse Facilities	7,019,017	6,753,417
Fair Value of Collateral Pledged	$ 4,619,634	$ 4,438,882
Weighted Average Months to Maturity	30 days	31 days
Single Family
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Fair Value of Collateral Pledged	$ 116,100	$ 116,800
Residential Loans and Real Estate Owned
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Carrying Value of Repurchase Agreements and Warehouse Facilities	629,881	462,127
Fair Value of Collateral Pledged	734,300
Residential loans held for sale
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Carrying Value of Repurchase Agreements and Warehouse Facilities	112,961	73,446
Fair Value of Collateral Pledged	119,800	78,000
Residential Loans
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Fair Value of Collateral Pledged		538,400
Residential Mortgage Loans
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Maximum Aggregate Uncommitted Principal or Line Amount	3,425,000	3,225,000
Outstanding Repurchase Agreements or Warehouse Facilities	804,986	599,392
Net Deferred Finance Costs	(38)	(61)
Carrying Value of Repurchase Agreements and Warehouse Facilities	804,948	599,331
Fair Value of Collateral Pledged	$ 970,125	$ 733,202
Weighted Average Rate	5.74%	5.80%
Weighted Average Months to Maturity	5 years 3 days	5 years 10 months 9 days

Assets Sold under Agreements to Repurchase, Deferred Finance Costs, Net

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- Definition

The total amount of repossession that is available under the repurchase agreement.

+ References

No definition available.

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- Definition

Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.

+ References

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- Definition

Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.

+ References

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- Definition

Amount, including accrued interest, to be repaid to counterparty to repurchase agreement when carrying amount or market value if higher, of security or other asset sold under repurchase agreement exceeds 10 percent of total assets.

+ References

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- Definition

Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Weighted average maturity (weighted by amount of the agreement) of repurchase agreements with the counterparty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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