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Securities - Continuous Unrealized Loss Position (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 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 376 372
Less Than 12 Months, Fair Value $ 81,494 $ 51,296
Less Than 12 Months, Unrealized Losses (944) (470)
12 Months or Greater, Fair Value 245,363 398,662
12 Months or Greater, Unrealized Losses (25,193) (34,459)
Fair Value 326,857 449,958
Unrealized Losses $ (26,137) $ (34,929)
Percentage of depreciation from amortized cost experienced by debt securities in unrealized loss position 7.40% 7.20%
Allowance for available for sale securities $ 0 $ 0
Net realized gain from sales of securities portfolio 7,300  
Unwind of fair value hedges on treasury and municipal securities 10,400  
Accrued interest receivable on securities $ 3,300 $ 6,200
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] 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 195 185
Less Than 12 Months, Fair Value $ 47,577 $ 22,430
Less Than 12 Months, Unrealized Losses (832) (354)
12 Months or Greater, Fair Value 89,280 94,839
12 Months or Greater, Unrealized Losses (12,359) (12,159)
Fair Value 136,857 117,269
Unrealized Losses $ (13,191) $ (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 109 108
Less Than 12 Months, Fair Value $ 12,054 $ 4,701
Less Than 12 Months, Unrealized Losses (35) (14)
12 Months or Greater, Fair Value 106,909 110,265
12 Months or Greater, Unrealized Losses (10,457) (10,047)
Fair Value 118,963 114,966
Unrealized Losses $ (10,492) $ (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 45
Less Than 12 Months, Fair Value $ 9,378 $ 10,341
Less Than 12 Months, Unrealized Losses (57) (68)
12 Months or Greater, Fair Value 35,054 39,318
12 Months or Greater, Unrealized Losses (2,310) (2,563)
Fair Value 44,432 49,659
Unrealized Losses $ (2,367) $ (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 23 25
Less Than 12 Months, Fair Value $ 932 $ 800
Less Than 12 Months, Unrealized Losses (6) (3)
12 Months or Greater, Fair Value 1,213 1,884
12 Months or Greater, Unrealized Losses (21) (27)
Fair Value 2,145 2,684
Unrealized Losses $ (27) $ (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 10 7
Less Than 12 Months, Fair Value $ 11,553 $ 13,024
Less Than 12 Months, Unrealized Losses (14) (31)
12 Months or Greater, Fair Value 12,907 6,150
12 Months or Greater, Unrealized Losses (46) (6)
Fair Value 24,460 19,174
Unrealized Losses $ (60) $ (37)