Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Condensed Consolidated Statements of Operations and Comprehensive Income
Net sales	$ 833,837	$ 648,004	$ 1,611,981	$ 1,290,161
Cost of sales (exclusive of depreciation and amortization shown separately below)	565,687	435,744	1,099,015	872,797
Gross profit	268,150	212,260	512,966	417,364
Operating expenses:
Selling, general and administrative	185,268	159,898	370,703	315,970
Depreciation and amortization	30,787	16,713	57,109	33,058
Total operating expenses	216,055	176,611	427,812	349,028
Operating income	52,095	35,649	85,154	68,336
Other (expense) income:
Interest expense	(19,182)	(7,917)	(35,370)	(15,417)
Change in fair value of financial instruments	(376)	(238)	(6,395)	(434)
Write-off of debt discount and deferred financing fees				(74)
Other income, net	434	512	1,068	998
Total other expense, net	(19,124)	(7,643)	(40,697)	(14,927)
Income before taxes	32,971	28,006	44,457	53,409
Provision for income taxes	8,059	9,983	10,895	20,043
Net income	$ 24,912	$ 18,023	$ 33,562	$ 33,366
Weighted average common shares outstanding:
Basic (in shares)	41,149	41,006	41,121	40,988
Diluted (in shares)	41,918	42,146	41,996	42,137
Net income per common share:
Basic (in dollars per share)	$ 0.59	$ 0.44	$ 0.80	$ 0.81
Diluted (in dollars per share)	$ 0.58	$ 0.43	$ 0.78	$ 0.79
Comprehensive income
Net income	$ 24,912	$ 18,023	$ 33,562	$ 33,366
Foreign currency translation loss	(4,902)		(8,693)
Changes in other comprehensive income, net of tax	378	243	491	396
Comprehensive income	$ 20,388	$ 18,266	$ 25,360	$ 33,762