Quarterly Results of Operations (Unaudited) - Summary of Unaudited Quarterly Consolidated Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	May 31, 2019		Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018		May 31, 2018		Feb. 28, 2018	Nov. 30, 2017		Aug. 31, 2017	May 31, 2019	May 31, 2018	May 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 938,842		$ 874,381	$ 958,226	$ 988,107		$ 1,020,460		$ 841,657	$ 871,266		$ 848,237	$ 3,759,556	$ 3,581,620	$ 3,014,108
Gross margin	126,003		90,021	120,934	142,997		162,946		127,055	140,079		132,778	479,955	562,857	535,905
Impairment of goodwill and long-lived assets	5,436	[1]			2,381	[1]	52,919	[1]		8,289	[1]		7,817	61,208
Net earnings	38,975		29,548	37,792	56,958		32,857		78,297	41,622		48,074	163,273	200,850	217,937
Net earnings attributable to controlling interest	$ 37,738		$ 26,773	$ 34,002	$ 54,942		$ 30,769		$ 79,087	$ 39,403		$ 45,534	$ 153,455	$ 194,794	$ 204,515
Basic earnings per share - controlling interest	$ 0.68		$ 0.47	$ 0.59	$ 0.94		$ 0.52		$ 1.31	$ 0.64		$ 0.73	$ 2.68	$ 3.20	$ 3.28
Diluted earnings per share - controlling interest	$ 0.66		$ 0.46	$ 0.57	$ 0.91		$ 0.50		$ 1.27	$ 0.62		$ 0.70	$ 2.61	$ 3.09	$ 3.15

[1] For additional information regarding the Company’s impairment activity, refer to “Note D – Goodwill and Other Long-Lived Assets.”