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Retirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Assumptions Used in Accounting for the Defined Benefit Plan
The assumptions used in accounting for the defined benefit plans were as follows for the years ended December 31:
 20222021
Weighted average discount rates for pension benefit obligation
5.36% - 5.40%
2.53% - 2.77%
Weighted average discount rates for net periodic benefit cost
2.53% - 2.77%
2.02% - 2.36%
Expected long-term rate of return on assets for net periodic benefit cost7.00 %7.00 %
The assumptions used in accounting for the postretirement health care plans are set forth below for the years ended December 31:
 20222021
Weighted average discount rates for benefit obligation5.29 %2.12 %
Weighted average discount rates for net periodic benefit cost2.12 %1.37 %
Health care cost trend rate assumed for next year6.25 %6.50 %
Rate to which the cost trend rate is assumed to decline (ultimate trend rate)
4.50% - 4.75%
4.50 %
Year that the rate reaches the ultimate trend rate20292029
Net Periodic Benefit Income and Expense For the Defined Benefit Plan
Set forth below is detail of the net periodic pension income for the defined benefit plans for the years ended December 31:
 20222021
Interest cost$1,105 $1,002 
Expected return on plan assets(2,707)(2,568)
Amortization of actuarial loss543 718 
Amortization of prior service cost58 59 
Net periodic pension income$(1,001)$(789)
Set forth below is detail of the net periodic benefit expense for the postretirement health care plans for the years ended December 31:
 20222021
Service cost$12 $13 
Interest cost38 27 
Amortization of actuarial loss64 19 
Amortization of prior service credit(52)(54)
Net periodic benefit expense$62 $5 
Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Income)
Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive loss (income) for the years ended December 31:
 20222021
Current year actuarial (gain) loss$1,717 $(3,793)
Amortization of actuarial loss(543)(718)
Amortization of prior service cost(58)(59)
Total recognized in other comprehensive loss (income)$1,116 $(4,570)
Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss for the years ended December 31:
 20222021
Current year actuarial gain$(44)$(48)
Amortization of actuarial loss(64)(19)
Amortization of prior service credit52 54 
Transfers— 126 
Total recognized in other comprehensive (income) loss$(56)$113 
Changes in Benefit Obligations During the Year and Funded Status of Defined Benefit Plan
The following table sets forth the changes in the benefit obligation and the plan assets during the year and the funded status of the defined benefit plans at December 31:
 20222021
Change in benefit obligation  
Projected benefit obligation at beginning of year$41,663 $44,600 
Interest cost1,105 1,002 
Actuarial gain(8,396)(1,367)
Benefits paid(2,650)(2,572)
Projected benefit obligation at end of year$31,722 $41,663 
Accumulated benefit obligation at end of year$31,722 $41,663 
Change in plan assets 
Fair value of plan assets at beginning of year$44,009 $41,099 
Actual return on plan assets(7,405)4,995 
Employer contributions531 487 
Benefits paid(2,650)(2,572)
Fair value of plan assets at end of year$34,485 $44,009 
Funded status at end of year$2,763 $2,346 
Amounts recognized in the balance sheets consist of: 
Non-current assets$6,991 $7,806 
Current liabilities(491)(542)
Non-current liabilities(3,737)(4,918)
 $2,763 $2,346 
Components of accumulated other comprehensive loss consist of:
Actuarial loss$10,682 $9,510 
Prior service cost645 703 
Deferred taxes(2,490)(2,254)
 $8,837 $7,959 
The following sets forth the changes in benefit obligations during the year and the funded status of the postretirement health care at December 31:
 20222021
Change in benefit obligation  
Benefit obligation at beginning of year$1,877 $2,054 
Service cost12 13 
Interest cost38 27 
Actuarial gain(44)(48)
Benefits paid(332)(169)
Benefit obligation at end of year$1,551 $1,877 
Funded status at end of year$(1,551)$(1,877)
Amounts recognized in the balance sheets consist of: 
Current liabilities$(206)$(190)
Noncurrent liabilities(1,345)(1,687)
 $(1,551)$(1,877)
Components of accumulated other comprehensive loss consist of: 
Actuarial loss$412 $520 
Prior service credit(56)(108)
Deferred taxes(180)(195)
 $176 $217 
Future Benefit Payments
Future pension benefit payments expected to be paid from assets of the pension plans are:
2023$2,731 
20242,729 
20252,700 
20262,691 
20272,681 
2028 - 203212,536 
 $26,068 
Future postretirement health care benefit payments expected to be paid are:
2023211 
2024188 
2025179 
2026183 
2027185 
2028 - 2032654 
 $1,600 
Actual Allocation Percentage and Target Allocation Percentage for Pension Plan Assets
The following is the actual allocation percentage and target allocation percentage for the pension plan assets at December 31:
 2022
Actual
Allocation		2021
Actual
Allocation		Target Allocation
Range
U.S. equity securities44.9 %48.7 %
36.0% - 54.0%
Non-U.S. equity securities20.5 %19.7 %
16.0% - 24.0%
Fixed income securities34.1 %31.2 %
30.0% - 40.0%
Money market funds0.5 %0.4 %
0.0% - 10.0%
Fair Value of Pension Plan Assets
The fair value of each major category of the Company's pension plan assets are valued using quoted market prices in active markets for identical assets, or Level 1 in the fair value hierarchy. Following are the values as of December 31:
Level 1
 20222021
U.S. equity securities$15,499 $21,434 
Non-U.S. equity securities7,055 8,678 
Fixed income securities11,753 13,723 
Money market funds178 174 
Total$34,485 $44,009