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Securities (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Jun. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Securities          
Total Securities available for sale, Fair Value $ 1,541,423 $ 1,541,423 $ 1,497,905    
Allowance for credit loss 2,921 2,921 2,627 $ 3,066 $ 0
Accrued interest receivable on available-for-sale debt securities 8,400 8,400 $ 8,800    
Carrying value of securities at the time of sale $ 80,700 $ 80,700      
Percentage of average yield of securities sold 5.29% 5.29%      
Municipals          
Securities          
Number of securities indicated that a credit loss | security   1 1    
Non-accrual with amortized cost $ 20,600 $ 20,600 $ 20,600    
Amount of allowance for credit loss on investment in debt 2,900 2,900 2,600    
Amount of investment in debt security measured at fair value 17,300 17,300 18,000    
Total Securities available for sale, Fair Value 17,278 17,278 18,000    
Allowance for credit loss 2,921 2,921 2,627    
Corporate          
Securities          
Total Securities available for sale, Fair Value 200,130 200,130 125,249    
Corporate | New York based bank holding company          
Securities          
Total Securities available for sale, Fair Value 10,000 10,000 10,000    
Held-to-maturity Securities          
Securities          
Specific reserve for outstanding balance of financing receivable in active forbearance 400 400 400    
Accrued interest receivable on held-to-maturity securities $ 100 $ 100 $ 100