Consolidated Statements of Income/(Loss) and Comprehensive Income/(Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Income Statement [Abstract]
Net sales	$ 864,126	$ 1,059,195	$ 529,618
Cost of sales	489,562	610,212	363,929
Gross profit	374,564	448,983	165,689
Operating expenses:
Research and development	7,262	7,480	7,364
Selling, marketing, and distribution	43,156	42,603	41,987
General and administrative	72,493	79,268	66,033
Total operating expenses	122,911	129,351	115,384
Operating income from continuing operations	251,653	319,632	50,305
Other income/(expense), net:
Other income/(expense), net	2,868	2,252	495
Interest expense, net	(2,135)	(3,919)	(11,625)
Total other income/(expense), net	733	(1,667)	(11,130)
Income from continuing operations before income taxes	252,386	317,965	39,175
Income tax expense	57,892	74,394	11,522
Income from continuing operations	194,494	243,571	27,653
Discontinued operations:
Income/(loss) from discontinued operations, net of tax	0	8,478	(88,883)
Net income/(loss)	194,494	252,049	(61,230)
Comprehensive income/(loss):
Other comprehensive loss, net of tax	0	0	(547)
Comprehensive income/(loss):	$ 194,494	$ 252,049	$ (61,777)
Net income/(loss) per share:
Basic - continuing operations	$ 4.12	$ 4.46	$ 0.50
Basic - Net income/(loss)	4.12	4.62	(1.11)
Diluted - continuing operations	4.08	4.40	0.50
Diluted - Net income/(loss)	$ 4.08	$ 4.55	$ (1.10)
Weighted average number of common shares outstanding:
Basic	47,227	54,613	54,983
Diluted	47,728	55,352	55,665