Weighted Average Shares and Net Income Per Share - Calculations of Basic and Diluted Weighted Average Common Shares (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net Income	$ 23,771,000	$ 17,095,000	$ 68,746,000	$ 56,798,000
Basic:
Weighted average common shares outstanding	51,388,000	51,318,000	51,384,000	51,372,000
Net Income per share	$ 0.46	$ 0.33	$ 1.34	$ 1.11
Diluted:
Weighted average common shares outstanding	52,038,000	51,978,000	51,999,000	52,056,000
Treasury stock impact of stock options	650,000	660,000	615,000	684,000
Total common and common equivalent shares	52,038,000	51,978,000	51,999,000	52,056,000
Net Income per share	$ 0.46	$ 0.33	$ 1.32	$ 1.09