v3.26.3
Investment Securities - Schedule of Contractual Maturities of Investment Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Available-for-sale securities      
Due in one year or less, amortized cost $ 48,833 $ 47,978 $ 58,284
Due in one to five years, amortized cost 146,758 143,352 160,939
Due in five to ten years, amortized cost 75,361 80,561 89,505
Due after ten years, amortized cost 29,263 27,481 26,992
Amortized Cost 8,507,107 6,635,481 5,702,349
Due in one year or less, fair value 48,700 47,915 58,315
Due in one to five years, fair value 142,968 141,123 159,081
Due in five to ten years, fair value 69,334 79,672 87,359
Due after ten years, fair value 24,171 25,257 24,408
Fair Value 7,569,498 6,236,263 5,274,124
Held-to-maturity securities      
Due in one year or less, amortized cost 20,949 47,030 44,853
Due in one to five years, amortized cost 73,196 76,452 81,277
Due in five to ten years, amortized cost 60,751 67,195 91,067
Due after ten years, amortized cost 300,029 302,153 302,624
Amortized Cost 3,120,716 3,344,165 3,438,801
Less: Allowance for credit losses (213) (260) (395)
Held-to-maturity securities, net of allowance for credit losses 3,120,503 3,343,905 3,438,406
Due in one year or less, fair value 20,888 46,630 44,288
Due in one to five years, fair value 71,002 76,366 81,174
Due in five to ten years, fair value 53,836 63,882 87,541
Due after ten years, fair value 222,308 246,728 245,188
Fair Value 2,393,520 2,785,147 2,860,970
Mortgage-backed      
Available-for-sale securities      
Mortgage-backed, amortized cost 8,206,892 6,336,109 5,366,629
Mortgage-backed, fair value 7,284,325 5,942,296 4,944,961
Held-to-maturity securities      
Mortgage-backed, amortized cost 2,665,791 2,851,335 2,918,980
Mortgage-backed, fair value $ 2,025,486 $ 2,351,541 $ 2,402,779