Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	COMMON STOCK	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE LOSS
Balance at beginning of period (shares) at Apr. 30, 2023		16,635,295
Balance at beginning of period at Apr. 30, 2023	$ 873,788	$ 370,259	$ 493,157	$ 10,372
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	37,850		37,850
Other comprehensive loss, net of tax	914			914
Stock-based compensation	2,247	$ 2,247
Exercise of stock-based compensation awards, net of amounts withheld for taxes (shares)		55,092
Exercise of stock-based compensation awards, net of amounts withheld for taxes	(1,830)	$ (1,830)
Stock repurchases (shares)		(328,295)
Stock repurchases	(22,280)	$ (6,565)	(15,715)
Employee benefit plan contributions (shares)		50,786
Employee benefit plan contributions	3,676	$ 3,676
Balance at end of period (shares) at Jul. 31, 2023		16,412,878
Balance at end of period at Jul. 31, 2023	$ 894,365	$ 367,787	515,292	11,286
Balance at beginning of period (shares) at Apr. 30, 2024	15,653,463	15,653,463
Balance at beginning of period at Apr. 30, 2024	$ 910,376	$ 359,784	543,274	7,318
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,633		29,633
Other comprehensive loss, net of tax	(2,142)			(2,142)
Stock-based compensation	2,941	$ 2,941
Exercise of stock-based compensation awards, net of amounts withheld for taxes (shares)		46,959
Exercise of stock-based compensation awards, net of amounts withheld for taxes	(2,730)	$ (2,730)
Stock repurchases (shares)		(271,460)
Stock repurchases	$ (24,239)	$ (5,525)	(18,714)
Balance at end of period (shares) at Jul. 31, 2024	15,428,962	15,428,962
Balance at end of period at Jul. 31, 2024	$ 913,839	$ 354,470	$ 554,193	$ 5,176