Quarterly Result of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Nov. 30, 2016	May 31, 2017
Quarterly Financial Information [Line Items]
Pretax goodwill and intangible asset impairment losses		$ 193,198
Kirker Reporting Unit
Quarterly Financial Information [Line Items]
Pretax goodwill and intangible asset impairment losses	$ 188,300
Flowcrete Polymer Flooring Business \| Middle East \| Bad Debt and Inventory Reserve
Quarterly Financial Information [Line Items]
Pretax charges relating to decision to exit	$ 12,300

Amount of increase (decrease) in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration