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, 2020		Feb. 29, 2020		Nov. 30, 2019	Aug. 31, 2019		May 31, 2019		Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018		May 31, 2020	May 31, 2019	May 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 611,627		$ 763,996		$ 827,637	$ 855,859		$ 938,842		$ 874,381	$ 958,226	$ 988,107		$ 3,059,119	$ 3,759,556	$ 3,581,620
Gross margin	89,890		115,545		120,611	117,291		126,003		90,021	120,934	142,997		443,337	479,955	562,857
Impairment of goodwill and long-lived assets	7,462	[1]	34,627	[1]		40,601	[1]	5,436	[1]			2,381	[1]	82,690	7,817	61,208
Net earnings (loss)	11,089		18,888		56,922	(2,455)		38,975		29,548	37,792	56,958		84,444	163,273	200,850
Net earnings (loss) attributable to controlling interest	$ 16,175		$ 15,311		$ 52,086	$ (4,776)		$ 37,738		$ 26,773	$ 34,002	$ 54,942		$ 78,796	$ 153,455	$ 194,794
Basic earnings (loss) per share - controlling interest	$ 0.30		$ 0.28		$ 0.95	$ (0.09)		$ 0.68		$ 0.47	$ 0.59	$ 0.94		$ 1.43	$ 2.68	$ 3.20
Diluted earnings (loss) per share - controlling interest	$ 0.29		$ 0.27		$ 0.93	$ (0.09)		$ 0.66		$ 0.46	$ 0.57	$ 0.91		$ 1.41	$ 2.61	$ 3.09

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