Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Condensed Consolidated Statements of Operations and Comprehensive Income
Net sales	$ 2,511,469	$ 2,319,146	$ 1,858,182
Cost of sales (exclusive of depreciation and amortization shown separately below)	1,692,893	1,560,575	1,265,018
Gross profit	818,576	758,571	593,164
Operating expenses:
Selling, general and administrative	633,877	585,078	470,035
Depreciation and amortization	65,530	69,240	64,215
Total operating expenses	699,407	654,318	534,250
Operating income	119,169	104,253	58,914
Other (expense) income:
Interest expense	(31,395)	(29,360)	(37,418)
Change in fair value of financial instruments	(6,125)	(382)	(19)
Write-off of debt discount and deferred financing fees	(74)	(7,103)
Other income, net	2,279	4,132	3,671
Total other expense, net	(35,315)	(32,713)	(33,766)
Income before taxes	83,854	71,540	25,148
Provision for income taxes	20,883	22,654	12,584
Net income	$ 62,971	$ 48,886	$ 12,564
Weighted average common shares outstanding:
Basic (in shares)	41,015,000	40,260,000	32,799,000
Diluted (in shares)	42,163,000	41,070,000	33,125,000
Net income per share:
Basic (in dollars per share)	$ 1.54	$ 1.21	$ 0.38
Diluted (in dollars per share)	$ 1.49	$ 1.19	$ 0.38
Comprehensive income
Net income	$ 62,971	$ 48,886	$ 12,564
Changes in other comprehensive income, net of tax	1,325	264	(1,158)
Comprehensive income	$ 64,296	$ 49,150	$ 11,406