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Investment Securities (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Less than 12 months, fair value $ 85,610 $ 199,903
Less than 12 months, unrealized losses 5,388 16,697
12 months or more, fair value 280,108 212,326
12 months or more, unrealized losses 45,330 45,631
Total, fair value 365,718 412,229
Total, unrealized losses 50,719 62,328
U.S Treasuries [Member]    
Less than 12 months, fair value 0 2,878
Less than 12 months, unrealized losses 0 104
12 months or more, fair value 10,008 6,936
12 months or more, unrealized losses 949 1,033
Total, fair value 10,008 9,814
Total, unrealized losses 949 1,137
U.S. Government sponsored enterprises    
Less than 12 months, fair value 2,926 2,904
Less than 12 months, unrealized losses 66 87
12 months or more, fair value 8,378 8,635
12 months or more, unrealized losses 555 619
Total, fair value 11,304 11,539
Total, unrealized losses 621 706
Mortgage-backed securities    
Less than 12 months, fair value 78,542 128,241
Less than 12 months, unrealized losses 5,043 8,740
12 months or more, fair value 161,848 120,464
12 months or more, unrealized losses 17,997 17,089
Total, fair value 240,390 248,705
Total, unrealized losses 23,040 25,829
State and political subdivisions    
Less than 12 months, fair value 4,142 65,880
Less than 12 months, unrealized losses 279 7,766
12 months or more, fair value 99,874 76,291
12 months or more, unrealized losses 25,829 26,890
Total, fair value 104,016 142,171
Total, unrealized losses $ 26,109 $ 34,656