Pension and Profit Sharing Plans - Components of Net Periodic Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Retirement Benefits [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Expense	Interest Expense	Interest Expense
Interest Cost of Projected Benefit Obligation	$ 1,413	$ 1,240	$ 1,167
Expected Return on Plan Assets	(1,512)	(1,366)	(1,299)
Recognized Net Actuarial Loss	250	123	143
Net Periodic Pension Cost	$ 151	$ (3)	$ 11