v3.26.1
Benefit Plans (Tables)
 9 Months Ended
May 31, 2026
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Costs Components of net periodic benefit costs for the three and nine months ended May 31, 2026 and 2025, are as follows:
Three Months Ended May 31,
Qualified
Pension Benefits		Nonqualified
Pension Benefits		Other Benefits
 202620252026202520262025
Components of net periodic benefit costs: (Dollars in thousands)
Service cost$11,348 $10,932 $831 $757 $210 $211 
Interest cost9,027 8,725 335 289 281 285 
Expected return on assets(12,579)(11,744)— — — — 
Prior service (credit) cost amortization(149)50 (8)(12)(111)(111)
Actuarial loss (gain) amortization4,125 3,204 246 200 (299)(309)
Net periodic benefit cost$11,772 $11,167 $1,404 $1,234 $81 $76 
Nine Months Ended May 31,
Qualified
Pension Benefits		Nonqualified
Pension Benefits		Other Benefits
 202620252026202520262025
Components of net periodic benefit costs: (Dollars in thousands)
Service cost$34,043 $32,795 $2,494 $2,270 $630 $633 
Interest cost27,080 26,174 1,005 866 844 855 
Expected return on assets(37,737)(35,232)— — — — 
Prior service (credit) cost amortization(446)149 (23)(35)(334)(334)
Actuarial loss (gain) amortization12,374 9,611 737 599 (898)(926)
Net periodic benefit cost $35,314 $33,497 $4,213 $3,700 $242 $228