Stock-Based Compensation and Stock Options - Stock Options (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Options outstanding, beginning balance, Shares	1,285,827	1,725,789	1,469,181	1,955,571
Options granted, Shares	0	129,000	63,000	178,500
Options exercised, Shares	(48,108)	(73,998)	(286,158)	(344,739)
Options cancelled/forfeited, Shares	(6,894)	(10,569)	(15,198)	(19,110)
Options outstanding, ending balance, Shares	1,230,825	1,770,222	1,230,825	1,770,222
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 47.71	$ 38.77	$ 43.13	$ 36.03
Options granted, Weighted Average Exercise Price	0	66.85	93.71	68.86
Options exercised, Weighted Average Exercise Price	42.82	31.59	33.27	26.44
Options cancelled/forfeited, Weighted Average Exercise Price	68.49	49.81	61.26	49.45
Options outstanding, ending balance, Weighted Average Exercise Price	$ 47.79	$ 41.05	$ 47.79	$ 41.05