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Pension and Other Postretirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Changes in Benefit Obligation, Plan Assets and Funded Status
The reconciliation of changes in the benefit obligation, plan assets and funded status of these plans is as follows:
Pension BenefitsOther Postretirement Benefits
 December 31,December 31,
 2025202420252024
Change in benefit obligation:    
Benefit obligation at beginning of period$491,664 $525,086 $194,138 $227,235 
Service cost1,100 1,208 146 — 
Interest cost25,373 25,724 11,876 11,031 
Benefit obligations assumed in Merger894 — 41,365 — 
Plan curtailments— (217)— — 
Actuarial loss (gain)11,094 (14,615)(23,753)(27,445)
Benefits and other payments(41,073)(45,522)(18,233)(16,683)
Benefit obligation at end of period$489,052 $491,664 $205,539 $194,138 
     
Change in plan assets:    
Fair value of plan assets at beginning of period$511,472 $549,571 $— $— 
Actual return on plan assets43,278 5,695 — — 
Company contributions1,730 1,728 18,233 16,683 
Benefits and other payments(41,073)(45,522)(18,233)(16,683)
Fair value of plan assets at end of period$515,407 $511,472 $— $— 
     
Funded status:    
Noncurrent assets$49,618 $41,938 $— $— 
Current liabilities(2,152)(2,057)(18,696)(17,887)
Noncurrent liabilities(21,111)(20,073)(186,843)(176,251)
Net asset (obligation) recognized$26,355 $19,808 $(205,539)$(194,138)
     
Amounts recognized in accumulated other comprehensive (loss) income consist of:    
Net actuarial loss (gain)$243,082 $253,641 $(74,435)$(53,416)
Prior service credit— — (6,519)(8,924)
Net amount recognized (before tax effect)$243,082 $253,641 $(80,954)$(62,340)
The reconciliation of changes in the benefit obligation and funded status of these plans is as follows:
CWPWorkers’ Compensation
 December 31,December 31,
 2025202420252024
Change in benefit obligation:    
Benefit obligation at beginning of period$161,878 $170,014 $46,107 $48,153 
State administrative fees and insurance bond premiums— — 1,730 1,837 
Service cost7,812 2,985 6,912 5,857 
Interest cost14,462 8,264 2,220 2,289 
Benefit obligations assumed in Merger118,585 — — — 
Actuarial loss (gain)11,293 (2,145)1,521 1,203 
Benefits paid(28,290)(17,240)(11,682)(13,232)
Benefit obligation at end of period$285,740 $161,878 $46,808 $46,107 
     
Funded status:    
Current assets$— $— $766 $1,000 
Current liabilities(24,539)(16,389)(12,611)(11,056)
Noncurrent liabilities(261,201)(145,489)(34,963)(36,051)
Net obligation recognized$(285,740)$(161,878)$(46,808)$(46,107)
     
Amounts recognized in accumulated other comprehensive (loss) income consist of:    
Net actuarial loss (gain)$12,761 $1,638 $(18,874)$(22,234)
Net amount recognized (before tax effect)$12,761 $1,638 $(18,874)$(22,234)
Schedule of Net Benefit Cost (Credit)
The components of net periodic benefit cost (credit) are as follows:
 Pension BenefitsOther Postretirement Benefits
 Year Ended December 31,Year Ended December 31,
 202520242023202520242023
Service cost$1,100 $1,208 $1,217 $146 $— $— 
Interest cost25,373 25,724 27,027 11,876 11,031 13,044 
Expected return on plan assets(30,258)(31,964)(39,470)— — — 
Amortization of prior service credits— — — (2,405)(2,405)(2,405)
Recognized net actuarial loss (gain)8,633 6,265 741 (2,734)(278)— 
Curtailment gain recognized— (217)— — — — 
Net periodic benefit cost (credit)$4,848 $1,016 $(10,485)$6,883 $8,348 $10,639 
The components of net periodic benefit cost are as follows:
CWPWorkers’ Compensation
 Year Ended December 31,Year Ended December 31,
 202520242023202520242023
Service cost$7,812 $2,985 $2,313 $6,912 $5,857 $5,597 
Interest cost14,462 8,264 8,285 2,220 2,289 2,514 
Recognized net actuarial loss (gain)170 434 (1,045)(1,839)(2,160)(2,049)
State administrative fees and insurance bond premiums— — — 1,730 1,837 1,953 
Net periodic benefit cost$22,444 $11,683 $9,553 $9,023 $7,823 $8,015 
Insured workers’ compensation fees and assessments6,407 — — 
Total workers’ compensation expense$15,430 $7,823 $8,015 
Schedule of Defined Benefit Plan with Accumulated Benefit Obligation in Excess of Plan Assets
The following table provides information related to pension plans with an accumulated benefit obligation in excess of plan assets:
 December 31,
 20252024
Projected benefit obligation$23,263 $22,130 
Accumulated benefit obligation$23,263 $22,130 
Fair value of plan assets$— $— 
Schedule of Weighted-Average Assumptions
The weighted-average assumptions used to determine benefit obligations are as follows:
Pension BenefitsOther Postretirement Benefits
 December 31,December 31,
 2025202420252024
Discount rate5.46 %5.66 %5.33 %5.60 %
Rate of compensation increase4.10 %4.04 %— — 
The weighted-average assumptions used to determine net periodic benefit costs are as follows:
Pension BenefitsOther Postretirement Benefits
 Year Ended December 31,Year Ended December 31,
 202520242023202520242023
Discount rate5.65 %5.14 %5.41 %5.66 %5.14 %5.43 %
Expected long-term return on plan assets6.15 %5.59 %5.81 %— — — 
Rate of compensation increase4.04 %3.93 %3.89 %— — — 
Schedule of Health Care Cost Trend Rates
The assumed health care cost trend rates are as follows:
 December 31,
 20252024
Health care cost trend rate for next year5.62 %6.01 %
Rate to which the cost trend is assumed to decline (ultimate trend rate)4.00 %4.00 %
Year that the rate reaches ultimate trend rate20482048
Schedule of Fair Value of Plan Assets The fair values of assets of the Pension Plan by asset category were as follows:
 Fair Value Measurements at December 31, 2025Fair Value Measurements at December 31, 2024
 TotalQuoted Prices in Active Markets for Identical Assets
(Level 1)		Significant Observable Inputs
(Level 2)		Significant Unobservable Inputs
(Level 3)		TotalQuoted Prices in Active Markets for Identical Assets
(Level 1)		Significant Observable Inputs
(Level 2)		Significant Unobservable Inputs
(Level 3)
Asset Category        
Cash/Accrued Income$30 $30 $— $— $103 $103 $— $— 
Mercer Common Collective Trusts (a)
515,377 — — — 511,369 — — — 
Total$515,407 $30 $— $— $511,472 $103 $— $— 
(a) In accordance with Subtopic 820-10, certain investments that were measured using the net asset value per share (or its equivalent) practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total plan assets.
Schedule of Expected Benefit Payments
The following benefit payments are expected to be paid in accordance with plan documents:
 Pension
Benefits		Other
Postretirement
Benefits
2026$40,158 $18,696 
2027$38,764 $18,261 
2028$38,937 $17,941 
2029$38,581 $17,458 
2030$37,355 $17,053 
Years 2031-2035$180,360 $80,352 
The following benefit payments, which reflect expected future claims as appropriate, are expected to be paid:
 Workers' Compensation
 CWP
Benefits		Total
Benefits		Actuarial
Benefits		Other
Benefits
2026$24,539 $13,460 $11,845 $1,615 
2027$23,669 $15,222 $13,566 $1,656 
2028$22,956 $16,397 $14,700 $1,697 
2029$22,207 $17,182 $15,442 $1,740 
2030$21,682 $17,835 $16,052 $1,783 
Years 2031-2035$108,676 $98,643 $89,036 $9,607