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EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Components of Net Periodic Cost

The components of the net periodic cost for pension benefits, including the Company's Pension Equalization Plan, and OPEB costs (principally health care and life insurance) for employees and covered dependents were as follows:

			Pension												OPEB
			Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
			June 30,						June 30,						June 30,						June 30,
(Thousands)			2021			2020			2021			2020			2021			2020			2021			2020
Service cost			$	2,182		$	2,056		$	6,547		$	6,167		$	1,211		$	1,213		$	3,633		$	3,640
Interest cost			2,278			2,647			6,834			7,940			1,518			1,757			4,553			5,270
Expected return on plan assets			(5,037)			(5,145)			(15,112)			(15,434)			(1,625)			(1,628)			(4,873)			(4,883)
Recognized actuarial loss			2,862			2,606			8,585			7,818			1,978			1,861			5,933			5,582
Prior service cost (credit) amortization			25			25			76			76			(44)			(49)			(134)			(148)
Net periodic benefit cost			$	2,310		$	2,189		$	6,930		$	6,567		$	3,038		$	3,154		$	9,112		$	9,461

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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