Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Condensed Consolidated Statements of Operations and Comprehensive Income
Net sales	$ 562,523	$ 420,482	$ 1,704,169	$ 1,331,000
Cost of sales (exclusive of depreciation and amortization shown separately below)	376,796	286,322	1,146,633	912,039
Gross profit	185,727	134,160	557,536	418,961
Operating expenses:
Selling, general and administrative	147,260	112,242	432,116	336,804
Depreciation and amortization	18,316	16,009	51,479	47,336
Total operating expenses	165,576	128,251	483,595	384,140
Operating income	20,151	5,909	73,941	34,821
Other (expense) income:
Interest expense	(7,431)	(9,473)	(22,162)	(27,990)
Write-off of debt discount and deferred financing fees	(211)		(7,103)
Other income, net	1,081	533	2,170	1,452
Total other (expense), net	(6,561)	(8,940)	(27,095)	(26,538)
Income (loss) before taxes	13,590	(3,031)	46,846	8,283
Provision for (benefit from) income taxes	5,363	(819)	12,232	4,659
Net income (loss)	$ 8,227	$ (2,212)	$ 34,614	$ 3,624
Weighted average shares outstanding:
Basic (in shares)	40,942,905	32,890,930	40,035,450	32,768,418
Diluted (in shares)	41,577,675	32,890,930	40,670,220	32,987,170
Net income (loss) per share:
Basic (in dollars per share)	$ 0.20	$ (0.07)	$ 0.86	$ 0.11
Diluted (in dollars per share)	$ 0.20	$ (0.07)	$ 0.85	$ 0.11
Comprehensive income (loss):
Net income (loss)	$ 8,227	$ (2,212)	$ 34,614	$ 3,624
Increase (decrease) in fair value of financial instrument, net of tax	226	(384)	238	(1,089)
Comprehensive income (loss)	$ 8,453	$ (2,596)	$ 34,852	$ 2,535