Stock-Based Compensation and Stock Options - Outstanding Options (Detail) - USD ($)	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
Granted, Number of Options	0	129,000	63,000	178,500
Exercised, Number of Options	(48,108)	(73,998)	(286,158)	(344,739)
Cancelled - forfeited, Number of Options	(6,894)
Cancelled - expired, Number of Options	0
Options outstanding, ending balance, Shares	1,230,825	1,770,222	1,230,825	1,770,222
Ending vested and expected to vest, Number of Options	1,074,012		1,074,012
Ending exercisable, Number of Options	706,743		706,743
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 47.71	$ 38.77	$ 43.13	$ 36.03
Granted, Weighted Average Exercise Price per Share	0	66.85	93.71	68.86
Exercised, Weighted Average Exercise Price per Share	42.82	31.59	33.27	26.44
Cancelled - forfeited, Weighted Average Exercise Price per Share	68.49
Cancelled - expired, Weighted Average Exercise Price per Share	0
Options outstanding, ending balance, Weighted Average Exercise Price	47.79	$ 41.05	47.79	$ 41.05
Ending vested and expected to vest, Weighted Average Exercise Price per Share	46.12		46.12
Ending exercisable, Weighted Average Exercise Price per Share	$ 36.63		$ 36.63
Option outstanding, Weighted Average Remaining Contractual Life (Years)	3 years
Ending vested and expected to vest, Weighted Average Remaining Contractual Life (Years)	3 years 14 days
Ending exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 6 months 10 days
Ending Outstanding Aggregate Intrinsic Value	$ 78,123,656		$ 78,123,656
Ending vested and expected to vest, Aggregate Intrinsic Value	69,960,809		69,960,809
Ending exercisable, Aggregate Intrinsic Value	$ 52,746,881		$ 52,746,881