Results of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	May 31, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 1,472,764	$ 1,459,989
Income (Loss) Before Income Taxes	142,849	91,938
Identifiable Assets	5,596,425		$ 5,441,355
Domestic
Segment Reporting Information [Line Items]
Net Sales	1,002,525	980,673
Foreign
Segment Reporting Information [Line Items]
Net Sales	470,239	479,316
Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	106,149	96,777
Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	250,609	266,577
Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	58,035	54,056
Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	38,859	42,895
Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	16,587	19,011
Operating Segments | CPG Segment
Segment Reporting Information [Line Items]
Net Sales	536,105	517,492
Income (Loss) Before Income Taxes	82,680	65,044
Identifiable Assets	1,594,453		1,573,329
Operating Segments | CPG Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	307,659	289,799
Operating Segments | CPG Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	228,446	227,693
Operating Segments | CPG Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	50,443	43,338
Operating Segments | CPG Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	114,302	125,287
Operating Segments | CPG Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	42,847	37,985
Operating Segments | CPG Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	20,396	20,290
Operating Segments | CPG Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	458	793
Operating Segments | PCG Segment
Segment Reporting Information [Line Items]
Net Sales	297,241	296,419
Income (Loss) Before Income Taxes	28,057	8,325
Identifiable Assets	992,995		951,644
Operating Segments | PCG Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	181,906	177,457
Operating Segments | PCG Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	115,335	118,962
Operating Segments | PCG Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	20,973	22,188
Operating Segments | PCG Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	64,459	60,614
Operating Segments | PCG Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	8,441	9,642
Operating Segments | PCG Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	7,424	10,212
Operating Segments | PCG Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	14,038	16,306
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	479,330	477,363
Income (Loss) Before Income Taxes	59,158	50,969
Identifiable Assets	1,987,280		1,953,279
Operating Segments | Consumer Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	381,229	375,536
Operating Segments | Consumer Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	98,101	101,827
Operating Segments | Consumer Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	32,505	29,005
Operating Segments | Consumer Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	51,009	57,876
Operating Segments | Consumer Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	6,315	6,122
Operating Segments | Consumer Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	6,181	6,912
Operating Segments | Consumer Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	2,091	1,912
Operating Segments | Specialty Segment
Segment Reporting Information [Line Items]
Net Sales	160,088	168,715
Income (Loss) Before Income Taxes	23,327	23,816
Identifiable Assets	711,348		689,133
Operating Segments | Specialty Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	131,731	137,881
Operating Segments | Specialty Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	28,357	30,834
Operating Segments | Specialty Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	2,228	2,246
Operating Segments | Specialty Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	20,839	22,800
Operating Segments | Specialty Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	432	307
Operating Segments | Specialty Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	4,858	5,481
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(50,373)	$ (56,216)
Identifiable Assets	$ 310,349		$ 273,970