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, 2024		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 income (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
Balance at end of period at Jul. 31, 2024	913,839	$ 354,470	554,193	5,176
Balance at beginning of period (shares) at Apr. 30, 2024		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	57,319
Balance at end of period (shares) at Oct. 31, 2024		15,161,275
Balance at end of period at Oct. 31, 2024	915,062	$ 355,377	556,412	3,273
Balance at beginning of period (shares) at Jul. 31, 2024		15,428,962
Balance at beginning of period at Jul. 31, 2024	913,839	$ 354,470	554,193	5,176
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,686		27,686
Other comprehensive income (loss), net of tax	(1,903)			(1,903)
Stock-based compensation	2,864	$ 2,864
Exercise of stock-based compensation awards, net of amounts withheld for taxes (shares)		28,840
Exercise of stock-based compensation awards, net of amounts withheld for taxes	0	$ 0
Stock repurchases (shares)		(348,877)
Stock repurchases	(32,699)	$ (7,232)	(25,467)
Employee benefit plan contributions (shares)		52,350
Employee benefit plan contributions	5,275	$ 5,275
Balance at end of period (shares) at Oct. 31, 2024		15,161,275
Balance at end of period at Oct. 31, 2024	$ 915,062	$ 355,377	556,412	3,273
Balance at beginning of period (shares) at Apr. 30, 2025	14,612,706	14,612,706
Balance at beginning of period at Apr. 30, 2025	$ 915,998	$ 346,453	568,990	555
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,595		14,595
Other comprehensive income (loss), net of tax	851			851
Stock-based compensation	2,260	$ 2,260
Exercise of stock-based compensation awards, net of amounts withheld for taxes (shares)		100,578
Exercise of stock-based compensation awards, net of amounts withheld for taxes	(3,894)	$ (3,894)
Stock repurchases (shares)		(209,757)
Stock repurchases	(12,407)	$ (4,427)	(7,980)
Employee benefit plan contributions (shares)		54,508
Employee benefit plan contributions	2,896	$ 2,896
Balance at end of period (shares) at Jul. 31, 2025		14,558,035
Balance at end of period at Jul. 31, 2025	$ 920,299	$ 343,288	575,605	1,406
Balance at beginning of period (shares) at Apr. 30, 2025	14,612,706	14,612,706
Balance at beginning of period at Apr. 30, 2025	$ 915,998	$ 346,453	568,990	555
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 20,692
Balance at end of period (shares) at Oct. 31, 2025	14,569,170	14,569,170
Balance at end of period at Oct. 31, 2025	$ 928,240	$ 345,910	581,702	628
Balance at beginning of period (shares) at Jul. 31, 2025		14,558,035
Balance at beginning of period at Jul. 31, 2025	920,299	$ 343,288	575,605	1,406
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,097		6,097
Other comprehensive income (loss), net of tax	(778)			(778)
Stock-based compensation	2,627	$ 2,627
Exercise of stock-based compensation awards, net of amounts withheld for taxes (shares)		11,135
Exercise of stock-based compensation awards, net of amounts withheld for taxes	$ (5)	$ (5)
Balance at end of period (shares) at Oct. 31, 2025	14,569,170	14,569,170
Balance at end of period at Oct. 31, 2025	$ 928,240	$ 345,910	$ 581,702	$ 628