Stock-Based Compensation and Stock Options - Stock Options (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Options outstanding, beginning balance, Shares	706,728	778,982	723,876	937,158
Options granted, Shares	69,200	50,200	149,400	110,450
Options exercised, Shares	(18,210)	(25,917)	(101,896)	(212,588)
Options cancelled/forfeited, Shares	(1,256)	(6,407)	(14,918)	(38,162)
Options outstanding, ending balance, Shares	756,462	796,858	756,462	796,858
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 96.14	$ 72.17	$ 84.55	$ 64.28
Options granted, Weighted Average Exercise Price	155.99	197.16	155.69	163.54
Options exercised, Weighted Average Exercise Price	67.63	62.78	51.17	53.27
Options cancelled/forfeited, Weighted Average Exercise Price	126.62	81.62	128.65	78.87
Options outstanding, ending balance, Weighted Average Exercise Price	$ 102.25	$ 80.27	$ 102.25	$ 80.27