Results of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	May 31, 2020
Segment Reporting Information [Line Items]
Net Sales	$ 1,606,670	$ 1,472,764
Income (Loss) Before Income Taxes	241,369	142,849
Identifiable Assets	5,694,419		$ 5,630,954
Domestic
Segment Reporting Information [Line Items]
Net Sales	1,127,104	1,002,525
Foreign
Segment Reporting Information [Line Items]
Net Sales	479,566	470,239
Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	123,582	106,149
Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	256,960	250,609
Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	48,304	58,035
Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	35,345	38,859
Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	15,375	16,587
Operating Segments | CPG Segment
Segment Reporting Information [Line Items]
Net Sales	547,690	536,105
Income (Loss) Before Income Taxes	98,349	82,680
Identifiable Assets	1,664,612		1,622,632
Operating Segments | CPG Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	327,961	307,659
Operating Segments | CPG Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	219,729	228,446
Operating Segments | CPG Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	55,642	50,443
Operating Segments | CPG Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	108,720	114,302
Operating Segments | CPG Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	34,853	42,847
Operating Segments | CPG Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	17,639	20,396
Operating Segments | CPG Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	2,875	458
Operating Segments | PCG Segment
Segment Reporting Information [Line Items]
Net Sales	259,788	297,241
Income (Loss) Before Income Taxes	28,514	28,057
Identifiable Assets	949,224		925,569
Operating Segments | PCG Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	156,062	181,906
Operating Segments | PCG Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	103,726	115,335
Operating Segments | PCG Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	17,112	20,973
Operating Segments | PCG Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	63,634	64,459
Operating Segments | PCG Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	5,594	8,441
Operating Segments | PCG Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	4,886	7,424
Operating Segments | PCG Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	12,500	14,038
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	641,168	479,330
Income (Loss) Before Income Taxes	132,722	59,158
Identifiable Assets	2,104,448		2,067,017
Operating Segments | Consumer Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	509,584	381,229
Operating Segments | Consumer Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	131,584	98,101
Operating Segments | Consumer Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	48,908	32,505
Operating Segments | Consumer Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	67,610	51,009
Operating Segments | Consumer Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	7,392	6,315
Operating Segments | Consumer Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	7,674	6,181
Operating Segments | Consumer Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales		2,091
Operating Segments | SPG Segment
Segment Reporting Information [Line Items]
Net Sales	158,024	160,088
Income (Loss) Before Income Taxes	20,449	23,327
Identifiable Assets	734,132		728,449
Operating Segments | SPG Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	133,497	131,731
Operating Segments | SPG Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	24,527	28,357
Operating Segments | SPG Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	1,920	2,228
Operating Segments | SPG Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	16,996	20,839
Operating Segments | SPG Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	465	432
Operating Segments | SPG Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	5,146	4,858
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(38,665)	$ (50,373)
Identifiable Assets	$ 242,003		$ 287,287