Results of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Segment Reporting Information [Line Items]
Net Sales	$ 1,140,630	$ 1,102,677	$ 3,963,150	$ 3,763,487
Income (Loss) Before Income Taxes	4,464	34,698	162,995	299,163
Domestic
Segment Reporting Information [Line Items]
Net Sales	740,807	695,659	2,592,867	2,403,732
Foreign
Segment Reporting Information [Line Items]
Net Sales	399,823	407,018	1,370,283	1,359,755
Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	69,993	62,571	269,012	251,967
Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	219,701	223,053	756,121	751,534
Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	51,507	58,041	158,064	166,982
Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	43,306	44,493	132,920	132,682
Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	15,316	18,860	54,166	56,590
Operating Segments | Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	580,889	569,210	2,080,830	2,001,883
Income (Loss) Before Income Taxes	11,368	17,804	134,818	174,402
Operating Segments | Industrial Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	299,442	277,374	1,118,016	1,038,594
Operating Segments | Industrial Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	281,447	291,836	962,814	963,289
Operating Segments | Industrial Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	40,378	40,006	163,141	166,056
Operating Segments | Industrial Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	154,753	155,127	526,962	517,303
Operating Segments | Industrial Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	44,420	50,763	136,905	145,315
Operating Segments | Industrial Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	28,415	29,021	87,626	84,087
Operating Segments | Industrial Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	13,481	16,919	48,180	50,528
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	384,996	363,370	1,302,768	1,205,945
Income (Loss) Before Income Taxes	23,212	29,123	115,747	146,576
Operating Segments | Consumer Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	304,184	280,422	1,021,933	920,714
Operating Segments | Consumer Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	80,812	82,948	280,835	285,231
Operating Segments | Consumer Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	21,404	19,421	73,813	69,658
Operating Segments | Consumer Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	43,888	46,997	159,118	164,678
Operating Segments | Consumer Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	6,781	6,946	20,183	20,582
Operating Segments | Consumer Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	6,904	7,643	21,735	24,251
Operating Segments | Consumer Segment | Foreign | Other Foreign
Segment Reporting Information [Line Items]
Net Sales	1,835	1,941	5,986	6,062
Operating Segments | Specialty Segment
Segment Reporting Information [Line Items]
Net Sales	174,745	170,097	579,552	555,659
Income (Loss) Before Income Taxes	17,147	22,792	74,927	90,398
Operating Segments | Specialty Segment | Domestic
Segment Reporting Information [Line Items]
Net Sales	137,181	137,863	452,918	444,424
Operating Segments | Specialty Segment | Foreign
Segment Reporting Information [Line Items]
Net Sales	37,564	32,234	126,634	111,235
Operating Segments | Specialty Segment | Foreign | Canada
Segment Reporting Information [Line Items]
Net Sales	8,211	3,144	32,058	16,253
Operating Segments | Specialty Segment | Foreign | Europe
Segment Reporting Information [Line Items]
Net Sales	21,060	20,929	70,041	69,553
Operating Segments | Specialty Segment | Foreign | Latin America
Segment Reporting Information [Line Items]
Net Sales	306	332	976	1,085
Operating Segments | Specialty Segment | Foreign | Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	7,987	7,829	23,559	24,344
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	$ (47,263)	$ (35,021)	$ (162,497)	$ (112,213)