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Investment Securities (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Amortized cost $ 449,031 $ 507,186
Gross unrealized gains 836 536
Gross unrealized losses 50,719 62,328
Estimated fair value 399,148 445,394
U.S Treasuries [Member]    
Amortized cost 10,957 10,951
Gross unrealized gains 0 0
Gross unrealized losses 949 1,137
Estimated fair value 10,008 9,814
U.S. Government sponsored enterprises    
Amortized cost 11,925 12,245
Gross unrealized gains 0 0
Gross unrealized losses 621 706
Estimated fair value 11,304 11,539
Mortgage-backed securities    
Amortized cost 296,024 299,222
Gross unrealized gains 836 445
Gross unrealized losses 23,040 25,829
Estimated fair value 273,820 273,838
State and political subdivisions    
Amortized cost 130,125 184,768
Gross unrealized gains 0 91
Gross unrealized losses 26,109 34,656
Estimated fair value $ 104,016 $ 150,203