v3.26.1
Investment Securities - Available For Sale with Unrealized Losses, Aggregated by Category and Period of Continuous Unrealized Loss (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Available for sale securities    
Less than 12 months Fair Value $ 6,461,000 $ 1,736,000
Less than 12 months Unrealized Losses 19,000 2,000
12 months or longer Fair Value 54,146,000 56,197,000
12 months or longer Unrealized Losses 3,843,000 3,867,000
Total Fair Value 60,607,000 57,933,000
Total Unrealized Losses 3,862,000 3,869,000
Unallocated portfolio layer method fair value basis adjustments (2,000) 2,000
U.S. agency mortgage-backed securities    
Available for sale securities    
Less than 12 months Fair Value 21,000 4,000
Less than 12 months Unrealized Losses 0 0
12 months or longer Fair Value 39,669,000 41,394,000
12 months or longer Unrealized Losses 3,152,000 3,151,000
Total Fair Value 39,690,000 41,398,000
Total Unrealized Losses 3,152,000 3,151,000
Less than 12 months unrealized losses less than stated amount 500 500
U.S. Treasury securities    
Available for sale securities    
Less than 12 months Fair Value 5,720,000 1,558,000
Less than 12 months Unrealized Losses 15,000 0
12 months or longer Fair Value 5,314,000 5,424,000
12 months or longer Unrealized Losses 161,000 182,000
Total Fair Value 11,034,000 6,982,000
Total Unrealized Losses 176,000 182,000
Less than 12 months unrealized losses less than stated amount   500
Corporate debt securities    
Available for sale securities    
Less than 12 months Fair Value 60,000 0
Less than 12 months Unrealized Losses 0 0
12 months or longer Fair Value 4,660,000 4,667,000
12 months or longer Unrealized Losses 357,000 360,000
Total Fair Value 4,720,000 4,667,000
Total Unrealized Losses 357,000 360,000
Less than 12 months unrealized losses less than stated amount 500  
Asset-backed securities    
Available for sale securities    
Less than 12 months Fair Value 629,000 147,000
Less than 12 months Unrealized Losses 2,000 0
12 months or longer Fair Value 3,845,000 4,046,000
12 months or longer Unrealized Losses 132,000 133,000
Total Fair Value 4,474,000 4,193,000
Total Unrealized Losses 134,000 133,000
Less than 12 months unrealized losses less than stated amount   500
U.S. state and municipal securities    
Available for sale securities    
Less than 12 months Fair Value 31,000 27,000
Less than 12 months Unrealized Losses 2,000 2,000
12 months or longer Fair Value 527,000 534,000
12 months or longer Unrealized Losses 31,000 32,000
Total Fair Value 558,000 561,000
Total Unrealized Losses 33,000 34,000
Non-agency commercial mortgage-backed securities    
Available for sale securities    
Less than 12 months Fair Value 0 0
Less than 12 months Unrealized Losses 0 0
12 months or longer Fair Value 113,000 113,000
12 months or longer Unrealized Losses 7,000 7,000
Total Fair Value 113,000 113,000
Total Unrealized Losses 7,000 7,000
Other    
Available for sale securities    
Less than 12 months Fair Value 0 0
Less than 12 months Unrealized Losses 0 0
12 months or longer Fair Value 18,000 19,000
12 months or longer Unrealized Losses 3,000 2,000
Total Fair Value 18,000 19,000
Total Unrealized Losses $ 3,000 $ 2,000