Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Condensed Consolidated Statements of Operations and Comprehensive Income
Net sales		$ 861,929	$ 833,837	$ 1,709,105	$ 1,611,981
Cost of sales (exclusive of depreciation and amortization shown separately below)		577,436	565,687	1,150,958	1,099,015
Gross profit		284,493	268,150	558,147	512,966
Operating expenses:
Selling, general and administrative		200,457	185,268	395,088	370,703
Depreciation and amortization		29,518	30,787	58,793	57,109
Total operating expenses		229,975	216,055	453,881	427,812
Operating income		54,518	52,095	104,266	85,154
Other (expense) income:
Interest expense		(17,559)	(19,182)	(35,836)	(35,370)
Change in fair value of financial instruments			(376)		(6,395)
Write-off of debt discount and deferred financing fees		(707)		(707)
Other income, net		813	434	1,752	1,068
Total other expense, net		(17,453)	(19,124)	(34,791)	(40,697)
Income before taxes		37,065	32,971	69,475	44,457
Provision for income taxes		7,927	8,059	15,517	10,895
Net income		$ 29,138	$ 24,912	$ 53,958	$ 33,562
Weighted average common shares outstanding:
Basic (in shares)		41,761	41,149	41,382	41,121
Diluted (in shares)		42,635	41,918	42,126	41,996
Net income per common share:
Basic (in dollars per share)	[1]	$ 0.70	$ 0.59	$ 1.30	$ 0.80
Diluted (in dollars per share)	[1]	$ 0.68	$ 0.58	$ 1.27	$ 0.78
Comprehensive income
Net income		$ 29,138	$ 24,912	$ 53,958	$ 33,562
Foreign currency translation income (loss)		(409)	(4,902)	11,451	(8,693)
Changes in other comprehensive income, net of tax		(3,602)	378	(9,667)	490
Comprehensive income		$ 25,127	$ 20,388	$ 55,742	$ 25,359

[1] See Note 15 for detailed calculations