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Retirement Plans (Tables)
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Summary of Funding and Administrative Cost of Qualified Noncontributory Defined Benefit Retirement Plan and 401(k) Plan Charged to Salaries and Employee Benefits
Funding and administrative costs of the qualified noncontributory defined benefit retirement plan and 401(k) plan charged to pension and other employee benefits in the consolidated condensed statements of income for the three-month period ended March 31, 2024 and 2023 were as follows (in thousands):
Three Months Ended 
March 31,
 20242023
Qualified noncontributory defined benefit retirement plan$327 339 
401(k) plan220 200