Debt Securities - Schedule of Debt Securities, Available-For-Sale, Unrealized Losses and Gains Position, Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
RMBS Available-for-Sale, at Fair Value
Investments, Debt and Equity Securities [Line Items]
Basis	$ 48,810	$ 68,226
Gross unrealized gains	648	273
Gross unrealized losses	(218)	(6,330)
Fair value	49,240	62,169
RMBS due March 2060
Investments, Debt and Equity Securities [Line Items]
Basis	3,916	3,825
Gross unrealized gains	67	0
Gross unrealized losses	0	(362)
Fair value	3,983	3,463
RMBS due December 2060
Investments, Debt and Equity Securities [Line Items]
Basis		7,521
Gross unrealized gains		0
Gross unrealized losses		(3,133)
Fair value		4,388
RMBS due January 2061
Investments, Debt and Equity Securities [Line Items]
Basis	5,268	4,886
Gross unrealized gains	0	0
Gross unrealized losses	(68)	(384)
Fair value	5,200	4,502
RMBS due June 2061
Investments, Debt and Equity Securities [Line Items]
Basis	8,833	8,674
Gross unrealized gains	154	0
Gross unrealized losses	0	(762)
Fair value	8,987	7,912
RMBS due October 2061
Investments, Debt and Equity Securities [Line Items]
Basis	5,389	6,015
Gross unrealized gains	0	0
Gross unrealized losses	(77)	(371)
Fair value	5,312	5,644
RMBS due March 2062
Investments, Debt and Equity Securities [Line Items]
Basis	5,789	9,397
Gross unrealized gains	0	0
Gross unrealized losses	(73)	(585)
Fair value	5,716	8,812
RMBS due July 2062
Investments, Debt and Equity Securities [Line Items]
Basis	8,915	12,081
Gross unrealized gains	256	0
Gross unrealized losses	0	(733)
Fair value	9,171	11,348
RMBS due October 2062
Investments, Debt and Equity Securities [Line Items]
Basis	4,389	4,673
Gross unrealized gains	32	221
Gross unrealized losses	0	0
Fair value	4,421	4,894
RMBS due May 2063
Investments, Debt and Equity Securities [Line Items]
Basis	6,311	11,154
Gross unrealized gains	139	52
Gross unrealized losses	0	0
Fair value	$ 6,450	$ 11,206

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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