Pension and Profit Sharing Plans - Schedule of Reconciliation of Obligations and Fair Values of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Retirement Benefits [Abstract]
Benefit Obligation at April 1,	$ 28,130	$ 29,189
Interest Cost on Projected Benefit Obligation	1,434	1,413	$ 1,240
Actuarial Gain	(612)	(829)
Benefits Paid	(1,669)	(1,643)
Benefit Obligation at March 31,	27,283	28,130	29,189
Fair Value of Plan Assets at April 1,	30,124	31,106
Actual Return on Plan Assets	1,037	641
Employer Contributions	0	20
Benefits Paid	(1,669)	(1,643)
Fair Value of Plan Assets at March 31,	29,492	30,124	$ 31,106
Funded Status at March 31,	2,209	1,994
Other Assets	2,209	1,994
Accumulated Other Comprehensive Losses - Net Actuarial Loss	4,115	4,454
Accumulated Other Comprehensive Losses	4,115	4,454
Tax Impact	(990)	(1,081)
Accumulated Other Comprehensive Losses, net of tax	$ 3,125	$ 3,373