Annual report pursuant to Section 13 and 15(d)

INVESTMENT SECURITIES (Schedule of Amortized Cost and Related Market Value of Investment Securities Available-for-Sale) (Details)

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INVESTMENT SECURITIES (Schedule of Amortized Cost and Related Market Value of Investment Securities Available-for-Sale) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Available-for-sale    
Amortized Cost $ 367,747 $ 455,232
Unrealized Gains 108 49
Unrealized Losses 29,928 41,946
Allowance for Credit Loss (25) (41)
Fair Value 337,902 413,294
Federal Home Loan Bank 3,200 2,100
Federal Reserve Bank stock 5,100 5,100
Held to Maturity    
Amortized Cost 625,022 660,744
Unrealized Gains 13 8
Unrealized Losses 33,284 48,051
Fair value 591,751 612,701
U.S. Government Treasury [Member]    
Available-for-sale    
Amortized Cost 25,947 23,977
Unrealized Gains 1 1
Unrealized Losses 1,269 1,928
Allowance for Credit Loss 0 0
Fair Value 24,679 22,050
Held to Maturity    
Amortized Cost 457,681 457,374
Unrealized Gains 0 0
Unrealized Losses 16,492 25,641
Fair value 441,189 431,733
U.S. Government Agency [Member]    
Available-for-sale    
Amortized Cost 152,983 198,888
Unrealized Gains 104 27
Unrealized Losses 8,053 12,863
Allowance for Credit Loss 0 0
Fair Value 145,034 186,052
States and Political Subdivisions [Member]    
Available-for-sale    
Amortized Cost 43,951 47,197
Unrealized Gains 1 0
Unrealized Losses 4,861 6,855
Allowance for Credit Loss (8) (13)
Fair Value 39,083 40,329
Mortgage-Backed Securities [Member]    
Available-for-sale    
Amortized Cost 73,015 80,829
Unrealized Gains 2 2
Unrealized Losses 9,714 11,426
Allowance for Credit Loss 0 0
Fair Value 63,303 69,405
Held to Maturity    
Amortized Cost 167,341 203,370
Unrealized Gains 13 8
Unrealized Losses 16,792 22,410
Fair value 150,562 180,968
Corporate Debt Securities [Member]    
Available-for-sale    
Amortized Cost 63,600 97,119
Unrealized Gains 0 19
Unrealized Losses 6,031 8,874
Allowance for Credit Loss (17) (28)
Fair Value 57,552 88,236
Other Securities [Member]    
Available-for-sale    
Amortized Cost 8,251 7,222
Unrealized Gains 0 0
Unrealized Losses 0 0
Allowance for Credit Loss 0 0
Fair Value $ 8,251 $ 7,222