Repurchase Agreements and Warehouse Facilities - Schedule of Unencumbered Securities (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 471,848
Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	434,623
Non-Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	36,049
Non-Agency RMBS \| Consolidated SLST
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	10,500
U.S. Treasury securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 1,176

Amount, after the effects of master netting arrangements, of securities borrowed from entities in exchange for collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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