| INVESTMENT SECURITIES (Tables) | 12 Months Ended | 
|---|---|
| Dec. 31, 2023 | |
| Investment Securities [Abstract] | |
| Schedule of Amortized Cost and Related Market Value of Investment Securities Available-for-Sale | Available for Amortized  Unrealized  Unrealized  Allowance for  Carrying  (Dollars in Thousands)  Cost  Gains  Losses  Credit Losses  Value  December 31, 2023  U.S. Government Treasury  $  25,947 $  1 $  1,269 $  - $  24,679 U.S. Government Agency  152,983 104 8,053 - 145,034 States and Political Subdivisions  43,951 1 4,861 (8) 39,083 Mortgage-Backed Securities (1) 73,015 2 9,714 - 63,303 Corporate Debt Securities  63,600 - 6,031 (17) 57,552 Other Securities (2) 8,251 - - - 8,251 Total $  367,747 $  108 $  29,928 $  (25) $  337,902 December 31, 2022  U.S. Government Treasury  $  23,977 $  1 $  1,928 $  - $  22,050 U.S. Government Agency  198,888 27 12,863 - 186,052 States and Political Subdivisions  47,197 - 6,855 (13) 40,329 Mortgage-Backed Securities (1) 80,829 2 11,426 - 69,405 Corporate Debt Securities  97,119 19 8,874 (28) 88,236 Other Securities (2) 7,222 - - - 7,222 Total $  455,232 $  49 $  41,946 $  (41) $  413,294 Held to Maturity  Amortized  Unrealized  Unrealized  Fair  (Dollars in Thousands)  Cost  Gains  Losses  Value  December 31, 2023  U.S. Government Treasury  $  457,681 $  - $  16,492 $  441,189 Mortgage-Backed Securities  167,341 13 16,792 150,562 Total $  625,022 $  13 $  33,284 $  591,751 December 31, 2022  U.S. Government Treasury  $  457,374 $  - $  25,641 $  431,733 Mortgage-Backed Securities  203,370 8 22,410 180,968 Total $  660,744 $  8 $  48,051 $  612,701 (1) Comprised of residential mortgage-backed (2) Includes Federal Home Loan Bank and Federal Reserve Bank recorded 3.2 5.1 December 31, 2023 and of $ 2.1 5.1 | 
| Schedule of Investment Securities with Maturity Distribution Based on Contractual Maturities | Available for Held to Maturity  Amortized  Fair  Amortized  Fair  (Dollars in Thousands)  Cost  Value  Cost  Value  Due in one year or less  $  28,545 $  27,854 $  90,119 $  88,588 Due after one through five years  138,299 127,843 367,562 352,601 Due after five through ten years  39,090 33,420 -  -  Mortgage-Backed Securities  73,015 63,303 167,341 150,562 U.S. Government Agency  80,547 77,231 -  -  Other Securities  8,251 8,251 -  -  Total $  367,747 $  337,902 $  625,022 $  591,751 | 
| Schedule of Investment Securities with Continuous Unrealized Loss Position | Less Than 12 Months  Greater Than 12 Months  Total  Fair  Unrealized  Fair  Unrealized  Fair  Unrealized  (Dollars in Thousands)  Value  Losses  Value  Losses  Value  Losses  December 31, 2023  Available for U.S. Government Treasury  $  - $  - $  19,751 $  1,269 $  19,751 $  1,269 U.S. Government Agency  12,890 74 121,220 7,979 134,110 8,053 States and Political Subdivisions  1,149 31 37,785 4,830 38,934 4,861 Mortgage-Backed Securities  23 - 63,195 9,714 63,218 9,714 Corporate Debt Securities  - - 57,568 6,031 57,568 6,031 Total 14,062 105 299,519 29,823 313,581 29,928 Held to Maturity  U.S. Government Treasury  153,880 3,178 287,310 13,314 441,190 16,492 Mortgage-Backed Securities  786 14 148,282 16,778 149,068 16,792 Total $  154,666 $  3,192 $  435,592 $  30,092 $  590,258 $  33,284 December 31, 2022  Available for U.S. Government Treasury  $  983 $  - $  19,189 $  1,928 $  20,172 $  1,928 U.S. Government Agency  63,112 2,572 113,004 10,291 176,116 12,863 States and Political Subdivisions  1,425 2 38,760 6,853 40,185 6,855 Mortgage-Backed Securities  6,594 959 60,458 10,467 67,052 11,426 Equity Securities  26,959 878 58,601 7,996 85,560 8,874 Total 99,073 4,411 290,012 37,535 389,085 41,946 Held to Maturity  U.S. Government Treasury  177,552 11,018 254,181 14,623 431,733 25,641 Mortgage-Backed Securities  88,723 6,814 91,462 15,596 180,185 22,410 Total $  266,275 $  17,832 $  345,643 $  30,219 $  611,918 $  48,051 |