Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Income Statement [Abstract]
Net sales	$ 1,042,076	$ 802,573
Cost of sales (exclusive of depreciation and amortization shown separately below)	706,243	542,115
Gross profit	335,833	260,458
Operating expenses:
Selling, general and administrative	214,081	183,112
Depreciation and amortization	27,714	27,097
Total operating expenses	241,795	210,209
Operating income	94,038	50,249
Other (expense) income:
Interest expense	(13,657)	(14,081)
Other income, net	792	655
Total other expense, net	(12,865)	(13,426)
Income before taxes	81,173	36,823
Provision for income taxes	19,971	9,604
Net income	$ 61,202	$ 27,219
Weighted average common shares outstanding:
Basic (in shares)	43,089	42,624
Diluted (in shares)	43,972	43,017
Net income per common share:
Basic (in dollars per share)	$ 1.42	$ 0.64
Diluted (in dollars per share)	$ 1.39	$ 0.63
Comprehensive income
Net income	$ 61,202	$ 27,219
Foreign currency translation (loss) income	(8,233)	16,281
Changes in other comprehensive income, net of tax	1,962	959
Comprehensive income	$ 54,931	$ 44,459