Schedule of Earnings Per Share (Detail) - shares	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Weighted-Average Shares of Common Stock Outstanding	40,547,048	41,543,067	42,021,892
Assumed Exercise of Outstanding Dilutive Options	539,309	570,325	623,779
Less Shares Repurchased from Proceeds of Assumed Exercised Options	(343,917)	(429,815)	(481,853)
Restricted Stock Units	187,272	143,132	121,525
Weighted-Average Common Stock and Dilutive Securities Outstanding	40,929,712	41,826,709	42,285,343