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SECURITIES (Tables)
 3 Months Ended
Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale
Amortized cost and estimated fair value of securities available for sale are as follows (in thousands):
 March 31, 2024
 Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesEstimated Fair Value
U.S. Treasury notes and bonds$59,828 $— $4,666 $— $55,162 
Mortgage-backed securities, residential467,125 7 77,425 — 389,707 
Obligations of states and political subdivisions39,415 — 1,270 — 38,145 
Corporate bonds and notes25,750 — 4,818 — 20,932 
SBA loan pools64,522 57 2,497 — 62,082 
Total$656,640 $64 $90,676 $— $566,028 
 December 31, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesEstimated Fair Value
U.S. Treasury notes and bonds$59,812 $— $4,480 $— $55,332 
Mortgage-backed securities, residential476,240 6 72,422 — 403,824 
Obligations of states and political subdivisions39,503 — 817 — 38,686 
Corporate bonds and notes25,750 — 5,081 — 20,669 
SBA loan pools67,787 75 2,380 — 65,482 
Total$669,092 $81 $85,180 $— $583,993 
Schedule of Amortized Cost and Estimated Fair Value of Securities Held to Maturity
Amortized cost and estimated fair value of securities held to maturity are as follows (in thousands):
 March 31, 2024
 Amortized CostUnrecognized GainsUnrecognized LossesEstimated Fair ValueAllowance for Credit Losses
Obligations of states and political subdivisions$785 $— $— $785 $— 

 December 31, 2023
 Amortized CostUnrecognized GainsUnrecognized LossesEstimated Fair ValueAllowance for Credit Losses
Obligations of states and political subdivisions$785 $— $— $785 $— 
Schedule of Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity Securities not due at a single maturity date are shown separately (in thousands):
March 31, 2024
Available for SaleHeld to Maturity
Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Within one year$8,499 $8,297 $— $— 
After one, but within five years97,948 90,687 145 145 
After five, but within ten years18,076 14,838 640 640 
After ten years470 417 — — 
124,993 114,239 785 785 
Mortgage-backed securities, residential467,125 389,707 — — 
Collateralized mortgage obligations— — — — 
SBA loan pools64,522 62,082 — — 
Total$656,640 $566,028 $785 $785 
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
The following tables summarize the investment securities available for sale with unrealized losses at March 31, 2024 and December 31, 2023 by aggregated major security type and length of time in a continuous unrealized loss position (in thousands):
 Less than 12 months12 months or longerTotal
March 31, 2024Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
U.S. Treasury notes and bonds$— $— $55,162 $4,666 $55,162 $4,666 
Mortgage-backed securities, residential— — 388,878 77,425 388,878 77,425 
Obligations of states and political subdivisions1,154 24 36,991 1,246 38,145 1,270 
Corporate bonds and notes— — 20,932 4,818 20,932 4,818 
SBA loan pools1,067 2 54,894 2,495 55,961 2,497 
Total temporarily impaired securities$2,221 $26 $556,857 $90,650 $559,078 $90,676 

 Less than 12 months12 months or longerTotal
December 31, 2023Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
U.S. Treasury notes and bonds$— $— $55,332 $4,480 $55,332 $4,480 
Mortgage-backed securities, residential— — 402,986 72,422 402,986 72,422 
Obligations of states and political subdivisions17,891 241 20,686 576 38,577 817 
Corporate bonds and notes7,492 2,508 13,177 2,573 20,669 5,081 
SBA loan pools3,914 13 54,468 2,367 58,382 2,380 
Total temporarily impaired securities$29,297 $2,762 $546,649 $82,418 $575,946 $85,180