Stock Options and Stock-Based Compensation - Weighted Average Assumptions (Detail)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	34.00%	36.00%	36.00%
Risk free interest rate, Minimum	3.91%	2.73%	0.71%
Risk free interest rate, Maximum	4.65%	4.36%	1.66%
Dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average option life	4 years	4 years 2 months 12 days	4 years 3 months 18 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average option life	4 years 1 month 6 days	4 years 3 months 18 days	4 years 4 months 24 days