Subsequent Events - Additional Information (Detail) - USD ($)		6 Months Ended
Dec. 22, 2017	Nov. 30, 2017
Subsequent Event [Line Items]
Corporate income tax rate		35.00%
Estimated income tax rate in fiscal 2019		24.00%
Subsequent Event
Subsequent Event [Line Items]
Corporate income tax rate	21.00%
Minimum
Subsequent Event [Line Items]
Net deferred tax liability		$ 30,000,000
Maximum
Subsequent Event [Line Items]
Net deferred tax liability		$ 40,000,000

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318

Name:	us-gaap_DeferredIncomeTaxLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant