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SECURITIES - Securities Available for Sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost $ 603,126 $ 617,271
Gross Unrealized Gains 216 49
Gross Unrealized Losses 75,015 85,878
Allowance for Credit Losses 0 0
Estimated Fair Value 528,327 531,442
Amortized Cost    
Within one year 2,541  
After one, but within five years 73,405  
After five, but within ten years 44,588  
After ten years 981  
Total 121,515  
Total 603,126 617,271
Fair Value    
Within one year 2,533  
After one, but within five years 70,288  
After five, but within ten years 40,975  
After ten years 902  
Total 114,698  
Total 528,327 531,442
U.S. Treasury notes and bonds    
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost 59,898 59,880
Gross Unrealized Gains 0 0
Gross Unrealized Losses 2,327 2,974
Allowance for Credit Losses 0 0
Estimated Fair Value 57,571 56,906
Fair Value    
Total 57,571 56,906
Mortgage-backed securities, residential    
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost 432,271 441,191
Gross Unrealized Gains 25 14
Gross Unrealized Losses 65,925 75,271
Allowance for Credit Losses 0 0
Estimated Fair Value 366,371 365,934
Amortized Cost    
Without single maturity date 432,271  
Fair Value    
Without single maturity date 366,371  
Total 366,371 365,934
Obligations of states and political subdivisions    
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost 36,867 37,059
Gross Unrealized Gains 0 0
Gross Unrealized Losses 1,599 1,554
Allowance for Credit Losses 0 0
Estimated Fair Value 35,268 35,505
Fair Value    
Total 35,268 35,505
Corporate bonds and notes    
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost 24,750 25,750
Gross Unrealized Gains 165 0
Gross Unrealized Losses 3,056 3,734
Allowance for Credit Losses 0 0
Estimated Fair Value 21,859 22,016
Fair Value    
Total 21,859 22,016
SBA loan pools    
Amortized cost and estimated fair value of debt securities available-for-sale    
Amortized Cost 49,340 53,391
Gross Unrealized Gains 26 35
Gross Unrealized Losses 2,108 2,345
Allowance for Credit Losses 0 0
Estimated Fair Value 47,258 51,081
Amortized Cost    
Without single maturity date 49,340  
Fair Value    
Without single maturity date 47,258  
Total $ 47,258 $ 51,081