Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 463,416	$ 477,639	$ 461,540
Net Actuarial Change in Defined Benefit Plans:
Unrealized Gain (Loss) During the Period, net of tax benefit of $26, $(24), and $(147)	74	(53)	(465)
Amortization of Net Actuarial Gain, net of tax benefit of $63, $59, and $30	174	192	93
Comprehensive Earnings	$ 463,664	$ 477,778	$ 461,168