Retirement Plan And Other Post-Retirement Benefits (Tables)

3 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost (Income)

Components of Net Periodic Benefit Cost (in thousands):

	Retirement Plan				Other Post-Retirement Benefits
Three Months Ended December 31,	2023		2022		2023		2022
Service Cost	$	1,049	$	1,297	$	109	$	147
Interest Cost	10,890		10,629		3,890		3,912
Expected Return on Plan Assets	(17,086)		(16,648)		(6,660)		(6,403)
Amortization of Prior Service Cost (Credit)	91		109		(107)		(107)
Amortization of (Gains) Losses	(335)		(1,920)		(567)		(2,189)
Net Amortization and Deferral for Regulatory Purposes (Including Volumetric Adjustments) (1)	4,057		5,378		2,238		3,820
Net Periodic Benefit Cost (Income)	$	(1,334)	$	(1,155)	$	(1,097)	$	(820)

(1)The Company’s policy is to record retirement plan and other post-retirement benefit costs in the Utility segment on a volumetric basis to reflect the fact that the Utility segment experiences higher throughput of natural gas in the winter months and lower throughput of natural gas in the summer months.