v3.26.3
Securities - Continuous Unrealized Loss Position (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
security
Sep. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 523 523 372
Less Than 12 Months, Fair Value $ 332,190 $ 332,190 $ 51,296
Less Than 12 Months, Unrealized Losses (29,678) (29,678) (470)
12 Months or Greater, Fair Value 215,363 215,363 398,662
12 Months or Greater, Unrealized Losses (33,125) (33,125) (34,459)
Fair Value 547,553 547,553 449,958
Unrealized Losses (62,803) $ (62,803) $ (34,929)
Percentage of depreciation from amortized cost experienced by debt securities in unrealized loss position   10.30% 7.20%
Allowance for available for sale securities 0 $ 0 $ 0
Net realized gain from sales of securities portfolio 0 7,300  
Termination of fair value hedges on treasury and municipal securities   10,400  
Accrued interest receivable on securities $ 3,800 $ 3,800 $ 6,200
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest Receivable Interest Receivable Interest Receivable
U.S. Treasury Securities      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security     2
12 Months or Greater, Fair Value     $ 146,206
12 Months or Greater, Unrealized Losses     (9,657)
Fair Value     146,206
Unrealized Losses     $ (9,657)
Municipal Bonds      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 320 320 185
Less Than 12 Months, Fair Value $ 187,693 $ 187,693 $ 22,430
Less Than 12 Months, Unrealized Losses (23,279) (23,279) (354)
12 Months or Greater, Fair Value 86,588 86,588 94,839
12 Months or Greater, Unrealized Losses (17,653) (17,653) (12,159)
Fair Value 274,281 274,281 117,269
Unrealized Losses $ (40,932) $ (40,932) $ (12,513)
Mortgage-Backed Securities      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 136 136 108
Less Than 12 Months, Fair Value $ 104,398 $ 104,398 $ 4,701
Less Than 12 Months, Unrealized Losses (5,819) (5,819) (14)
12 Months or Greater, Fair Value 97,743 97,743 110,265
12 Months or Greater, Unrealized Losses (13,563) (13,563) (10,047)
Fair Value 202,141 202,141 114,966
Unrealized Losses $ (19,382) $ (19,382) $ (10,061)
Corporate Securities      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 39 39 45
Less Than 12 Months, Fair Value $ 20,314 $ 20,314 $ 10,341
Less Than 12 Months, Unrealized Losses (567) (567) (68)
12 Months or Greater, Fair Value 29,499 29,499 39,318
12 Months or Greater, Unrealized Losses (1,892) (1,892) (2,563)
Fair Value 49,813 49,813 49,659
Unrealized Losses $ (2,459) $ (2,459) $ (2,631)
U.S Government Agency Securities      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 21 21 25
Less Than 12 Months, Fair Value $ 790 $ 790 $ 800
Less Than 12 Months, Unrealized Losses (7) (7) (3)
12 Months or Greater, Fair Value 1,098 1,098 1,884
12 Months or Greater, Unrealized Losses (13) (13) (27)
Fair Value 1,888 1,888 2,684
Unrealized Losses $ (20) $ (20) $ (30)
Asset-Backed Securities      
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position      
Number of Holdings with unrealized losses | security 7 7 7
Less Than 12 Months, Fair Value $ 18,995 $ 18,995 $ 13,024
Less Than 12 Months, Unrealized Losses (6) (6) (31)
12 Months or Greater, Fair Value 435 435 6,150
12 Months or Greater, Unrealized Losses (4) (4) (6)
Fair Value 19,430 19,430 19,174
Unrealized Losses $ (10) $ (10) $ (37)