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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
			2026						2025						2026						2025						2026						2025
Components of net periodic benefit costs:			(Dollars in thousands)
Service cost			$	11,348					$	10,932					$	831					$	757					$	210					$	211
Interest cost			9,027						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) amortization			4,125						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
			2026						2025						2026						2025						2026						2025
Components of net periodic benefit costs:			(Dollars in thousands)
Service cost			$	34,043					$	32,795					$	2,494					$	2,270					$	630					$	633
Interest cost			27,080						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) amortization			12,374						9,611						737						599						(898)						(926)
Net periodic benefit cost			$	35,314					$	33,497					$	4,213					$	3,700					$	242					$	228

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 715
-SubTopic 20
-Subparagraph (h)
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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