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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2022
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 and nine-month period ended September 30, 2022 and 2021 were as follows (in thousands):
Three Months Ended
September 30,		Nine Months Ended 
September 30,
 2022202120222021
Qualified noncontributory defined benefit retirement plan$342 261 958 822 
401(k) plan157 162 494 474 
Components of Net Periodic Pension Cost of Nonqualified Defined Benefit Retirement Plan
The components of net periodic pension cost of the nonqualified defined benefit retirement plan for the three and nine months ended September 30, 2022 and 2021 are summarized as follows (in thousands):
 Three Months Ended
September 30,		Nine Months Ended 
September 30,
 2022202120222021
Interest cost$14 13 40 39 
Amortization of unrecognized net loss2 2 6 6 
Net periodic pension cost$16 15 46 45 
Amount Recognized in Accumulated Other Comprehensive Income, Net of Deferred Federal Income Taxes for Nonqualified Defined Retirement Plan
Amounts recognized in accumulated other comprehensive income (loss), net of tax, for the nonqualified defined benefit retirement plan for the three and nine months ended September 30, 2022 and 2021 were as follows (in thousands):
Three Months Ended
September 30,		Nine Months Ended 
September 30,
2022202120222021
Net actuarial gain$(1)(2)$(4)(5)