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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost and Estimated Fair Value of Securities Available for Sale
Amortized cost and estimated fair value of securities available for sale at December 31, 2023 and 2022 are as follows (in thousands):
 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 
Collateralized mortgage obligations— — — — — 
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 


 December 31, 2022
 Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
U.S. treasury notes and bonds$61,800 $— $6,225 $55,574 
Mortgage-backed securities, residential518,838 — 83,707 435,131 
Collateralized mortgage obligations— — — — 
Obligations of states and political subdivisions39,828 2 938 38,892 
Corporate bonds and notes25,750 — 3,780 21,970 
SBA loan pools82,982 155 2,116 81,022 
Total$729,198 $157 $96,766 $632,589 
Amortized Cost and Estimated Fair Value of Debt Securities Available for Sale by Contractual Maturity Securities not due at a single maturity date are shown separately (in thousands):
 December 31, 2023
Amortized CostEstimated Fair Value
Within one year$5,678 $5,594 
After one, but within five years101,391 94,363 
After five, but within ten years17,526 14,302 
After ten years470 428 
Mortgage-backed securities: residential476,240 403,824 
SBA loan pools67,787 65,482 
Total$669,092 $583,993 
Amortized Cost and Estimated Fair Value of Securities Held to Maturity
Amortized cost and estimated fair value of securities held to maturity at December 31, 2023 and 2022 are as follows (in thousands):
 December 31, 2023
 Amortized CostUnrecognized GainsUnrecognized LossesEstimated Fair ValueAllowance for Credit Losses
Obligations of states and political subdivisions$785 $— $— $785 $— 
Time deposits with other financial institutions— — — — — 
 $785 $— $— $785 $— 

 December 31, 2022
 Amortized CostUnrecognized GainsUnrecognized LossesEstimated Fair Value
Obligations of states and political subdivisions$952 $— $— $952 
Time deposits with other financial institutions1,472 — 22 1,450 
 $2,424 $— $22 $2,402 
Contractual Maturities of Securities Held to Maturity
The contractual maturity of securities held to maturity was as follows at December 31, 2023 (in thousands):
 December 31, 2023
Amortized
Cost		Fair
Value
Within one year$— $— 
After one, but within five years145 145 
After five, but within ten years640 640 
After ten years— — 
Total$785 $785 
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
The following tables summarize the investment securities available for sale with unrealized losses, for which an allowance for credit losses has not been recorded as of December 31, 2023, and an other than temporary impairment (OTTI) has not been recorded as of December 31, 2022 aggregated by major security type and length of time in a continuous unrealized loss position (in thousands):
 Less than 12 months12 months or longerTotal
 Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses
2023
U.S. treasury notes and bonds$— $— $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 

 Less than 12 months12 months or longerTotal
 Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses
2022
U.S. treasury notes and bonds$1,011 $30 $54,563 $6,195 $55,574 $6,225 
Mortgage-backed securities, residential79,891 7,621 355,240 76,086 435,131 83,707 
Obligations of states and political subdivisions37,847 938 — — 37,847 938 
Corporate bonds and notes4,515 485 7,455 3,295 11,970 3,780 
SBA loan pools14,333 925 51,123 1,191 65,456 2,116 
Total temporarily impaired securities$137,597 $9,999 $468,381 $86,767 $605,978 $96,766