Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Condensed Consolidated Statements of Operations and Comprehensive Income
Net sales	$ 723,902	$ 585,508	$ 2,335,883	$ 1,875,669
Cost of sales (exclusive of depreciation and amortization shown separately below)	489,676	390,088	1,588,691	1,262,885
Gross profit	234,226	195,420	747,192	612,784
Operating expenses:
Selling, general and administrative	178,180	156,262	548,883	472,232
Depreciation and amortization	30,220	16,490	87,329	49,548
Total operating expenses	208,400	172,752	636,212	521,780
Operating income	25,826	22,668	110,980	91,004
Other (expense) income:
Interest expense	(19,526)	(7,871)	(54,896)	(23,288)
Change in fair value of financial instruments		(276)	(6,395)	(710)
Write-off of debt discount and deferred financing fees				(74)
Other income, net	957	677	2,025	1,675
Total other expense, net	(18,569)	(7,470)	(59,266)	(22,397)
Income before taxes	7,257	15,198	51,714	68,607
Provision (benefit) for income taxes	1,442	(4,488)	12,337	15,555
Net income	$ 5,815	$ 19,686	$ 39,377	$ 53,052
Weighted average common shares outstanding:
Basic (in shares)	40,912	41,036	41,053	41,004
Diluted (in shares)	41,371	42,228	41,789	42,167
Net income per common share:
Basic (in dollars per share)	$ 0.14	$ 0.48	$ 0.94	$ 1.29
Diluted (in dollars per share)	$ 0.14	$ 0.47	$ 0.92	$ 1.26
Comprehensive income
Net income	$ 5,815	$ 19,686	$ 39,377	$ 53,052
Foreign currency translation loss	(128)		(8,821)
Changes in other comprehensive income, net of tax		401	491	797
Comprehensive income	$ 5,687	$ 20,087	$ 31,047	$ 53,849