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Investment Securities -Summary of Investment Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost $ 8,780  
Debt securities, maturing 1 to 5 years, amortized cost 145,184  
Debt securities, maturing 5 to 10 years, amortized cost 183,843  
Debt securities, maturing over 10 years, amortized cost 851,985  
Amortized Cost 1,189,792 $ 1,184,288
Debt securities, maturing within 1 year, fair value 8,748  
Debt securities, maturing 1 to 5 years, fair value 137,822  
Debt securities, maturing 5 to 10 years, fair value 166,546  
Debt securities, maturing over 10 years, fair value 767,551  
Debt securities [1] $ 1,080,667 1,048,322
Available-for-sale securities, maturing within 1 year, weighted average yield 3.13%  
Available-for-sale securities, maturing 1 to 5 years, weighted average yield 2.66%  
Available-for-sale securities, maturing 5 to 10 years, weighted average yield 2.45%  
Available-for-sale securities, maturing over 10 years, weighted average yield 3.05%  
Available-for-sale securities, total weighted average yield 2.91%  
U.S. Treasury and government agencies    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost $ 1,291  
Debt securities, maturing 1 to 5 years, amortized cost 14,282  
Debt securities, maturing 5 to 10 years, amortized cost 6,931  
Debt securities, maturing over 10 years, amortized cost 5,698  
Amortized Cost 28,202 30,999
Debt securities, maturing within 1 year, fair value 1,284  
Debt securities, maturing 1 to 5 years, fair value 13,699  
Debt securities, maturing 5 to 10 years, fair value 7,154  
Debt securities, maturing over 10 years, fair value 5,824  
Debt securities 27,961 30,296
U.S. government sponsored agencies    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost 0  
Debt securities, maturing 1 to 5 years, amortized cost 67,074  
Debt securities, maturing 5 to 10 years, amortized cost 26,709  
Debt securities, maturing over 10 years, amortized cost 87,415  
Amortized Cost 181,198 128,500
Debt securities, maturing within 1 year, fair value 0  
Debt securities, maturing 1 to 5 years, fair value 63,296  
Debt securities, maturing 5 to 10 years, fair value 24,609  
Debt securities, maturing over 10 years, fair value 86,803  
Debt securities 174,708 118,607
States and political subdivisions    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost 5,463  
Debt securities, maturing 1 to 5 years, amortized cost 44,854  
Debt securities, maturing 5 to 10 years, amortized cost 68,790  
Debt securities, maturing over 10 years, amortized cost 110,012  
Amortized Cost 229,119 239,906
Debt securities, maturing within 1 year, fair value 5,447  
Debt securities, maturing 1 to 5 years, fair value 42,803  
Debt securities, maturing 5 to 10 years, fair value 60,401  
Debt securities, maturing over 10 years, fair value 98,128  
Debt securities 206,779 213,296
Residential mortgage-backed securities    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost 26  
Debt securities, maturing 1 to 5 years, amortized cost 5,458  
Debt securities, maturing 5 to 10 years, amortized cost 51,746  
Debt securities, maturing over 10 years, amortized cost 622,345  
Amortized Cost 679,575 717,772
Debt securities, maturing within 1 year, fair value 26  
Debt securities, maturing 1 to 5 years, fair value 5,338  
Debt securities, maturing 5 to 10 years, fair value 48,393  
Debt securities, maturing over 10 years, fair value 553,969  
Debt securities 607,726 628,924
Commercial mortgage-backed securities    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost 0  
Debt securities, maturing 1 to 5 years, amortized cost 12,016  
Debt securities, maturing 5 to 10 years, amortized cost 26,667  
Debt securities, maturing over 10 years, amortized cost 26,515  
Amortized Cost 65,198 60,611
Debt securities, maturing within 1 year, fair value 0  
Debt securities, maturing 1 to 5 years, fair value 11,231  
Debt securities, maturing 5 to 10 years, fair value 23,379  
Debt securities, maturing over 10 years, fair value 22,827  
Debt securities 57,437 51,234
Bank-issued trust preferred securities    
Schedule of Available-for-sale Securities    
Debt securities, maturing within 1 year, amortized cost 2,000  
Debt securities, maturing 1 to 5 years, amortized cost 1,500  
Debt securities, maturing 5 to 10 years, amortized cost 3,000  
Debt securities, maturing over 10 years, amortized cost 0  
Amortized Cost 6,500 6,500
Debt securities, maturing within 1 year, fair value 1,991  
Debt securities, maturing 1 to 5 years, fair value 1,455  
Debt securities, maturing 5 to 10 years, fair value 2,610  
Debt securities, maturing over 10 years, fair value 0  
Debt securities $ 6,056 $ 5,965
[1]     Available-for-sale investment securities and held-to-maturity investment securities are presented net of allowance for credit losses of $0 and $236, respectively, at September 30, 2024, and $0 and $238, respectively, at December 31, 2023.