v3.26.1
Investments - Narrative (Details)
 3 Months Ended
Mar. 31, 2026
USD ($)
security
Mar. 31, 2025
USD ($)
security
Dec. 31, 2025
USD ($)
security
Debt Securities, Available-for-Sale [Line Items]      
Accrued interest receivable on available-for-sale securities $ 5,200,000   $ 5,100,000
Unrealized losses 0    
Investment securities, fair value 1,434,538,000   1,427,401,000
Carrying value and amortized cost 1,496,857,000   1,486,194,000
Unrealized gain (loss) on equity securities 0 $ 8,000  
Collateral Pledged      
Debt Securities, Available-for-Sale [Line Items]      
Investment securities, fair value 540,000,000.0   565,800,000
Carrying value and amortized cost $ 583,500,000   $ 610,100,000
Sale Of Available-for-Sale Securities      
Debt Securities, Available-for-Sale [Line Items]      
Number of investment securities sold | security 10 3  
Proceeds from sale of investment securities $ 18,000,000.0 $ 5,600,000  
Mortgage-backed securities      
Debt Securities, Available-for-Sale [Line Items]      
Number of securities in unrealized loss portions for longer than 12 months | security 340   357
Number of securities in unrealized loss positions for less than 12 months | security 55   18
Investment securities, fair value $ 1,411,220,000   $ 1,410,679,000
Carrying value and amortized cost $ 1,473,438,000   $ 1,469,440,000
U.S. government agencies      
Debt Securities, Available-for-Sale [Line Items]      
Number of securities in unrealized loss portions for longer than 12 months | security 1   1
Number of securities in unrealized loss positions for less than 12 months | security 2    
Investment securities, fair value $ 20,254,000   $ 13,617,000
Carrying value and amortized cost $ 20,274,000   $ 13,603,000
Municipal bonds      
Debt Securities, Available-for-Sale [Line Items]      
Number of securities in unrealized loss portions for longer than 12 months | security 2   1
Number of securities in unrealized loss positions for less than 12 months | security 1   2
Investment securities, fair value $ 3,064,000   $ 3,105,000
Carrying value and amortized cost $ 3,145,000   $ 3,151,000