Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Feb. 28, 2017	Nov. 30, 2016	Feb. 28, 2017	May 31, 2016
Goodwill And Intangible Assets [Line Items]
Accumulated impairment losses	$ 155,400,000		$ 155,400,000	$ 14,900,000
Preliminary goodwill impairment losses			140,456,000
Intangible asset impairment loss			53,180,000
Goodwill	1,133,013,000		1,133,013,000	$ 1,219,630,000
Trademarks and Trade Names
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets, impairment loss			7,535,000
Restore Indefinite-lived Tradename
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets, impairment loss	4,900,000		$ 4,900,000
Amortizable life of tradename			10 years
Restore Indefinite-lived Tradename | Sales Revenue, Net | Product Concentration Risk
Goodwill And Intangible Assets [Line Items]
Percentage of product to total sales				60.00%
Kirker Reporting Unit
Goodwill And Intangible Assets [Line Items]
Preliminary goodwill impairment losses			$ 140,500,000
Intangible asset impairment loss		$ 45,700,000
Fair value in excess of carrying value				8.00%
Percentage of loss on sales		15.00%
Assumed long-term earnings growth rate			3.00%
Weighted-average cost of capital			8.00%
Goodwill	0	$ 0	$ 0
Kirker Reporting Unit | Trademarks and Trade Names
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets, impairment loss		$ 2,000,000
Recalculated fair value of identifiable indefinite-lived intangible assets	5,800,000		5,800,000
Consumer Segment
Goodwill And Intangible Assets [Line Items]
Preliminary goodwill impairment losses			140,456,000
Intangible asset impairment loss	4,900,000		52,600,000
Goodwill	449,511,000		449,511,000	$ 572,507,000
Industrial Segment
Goodwill And Intangible Assets [Line Items]
Other intangible asset accumulated impairment losses, gross				600,000
Goodwill	$ 510,021,000		$ 510,021,000	$ 475,355,000