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Consolidated Statements of Comprehensive Earnings (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 137,383	$ 143,520	$ 260,745	$ 277,362
Net Actuarial Change in Defined Benefit Plans:
Amortization of Net Actuarial Loss	53	60	106	120
Tax Expense	(12)	(15)	(24)	(30)
Comprehensive Earnings	$ 137,424	$ 143,565	$ 260,827	$ 277,452

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