v3.26.1
Investment Securities (Summary of Investment in Agency Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis $ 88,471,000 $ 81,817,000
Debt Securities, Trading and Available-for-sale 87,381,000 81,719,000
Total agency MBS, at fair value 86,784,000 81,088,000
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 16,000 16,000
Debt Securities, Trading and Available-for-sale 15,000 15,000
Commercial Mortgage Backed Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 10,000 11,000
Debt Securities, Trading and Available-for-sale 9,000 10,000
Credit Risk Transfer Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 535,000 561,000
Debt Securities, Trading and Available-for-sale 573,000 606,000
Fixed Income Securities [Member] | Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 83,437,000 77,643,000
Debt Securities, Trading and Available-for-sale 82,334,000 77,483,000
Adjustable-Rate [Member] | Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 814,000 858,000
Debt Securities, Trading and Available-for-sale 815,000 867,000
Collateralized Mortgage Obligations [Member] | Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 77,000 85,000
Debt Securities, Trading and Available-for-sale 74,000 83,000
Interest Only And Principal Only Strip [Member] | Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 123,000 122,000
Debt Securities, Trading and Available-for-sale 115,000 116,000
Multifamily [Member] | Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis 3,459,000 2,521,000
Debt Securities, Trading and Available-for-sale 3,446,000 2,539,000
Agency Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Trading and Available-for-sale, Amortized Cost Basis $ 87,910,000 $ 81,229,000