The gross income statement effect of insurance proceeds for each material event or transaction (that would not reasonably be expected to recur in the foreseeable future) that possesses a high degree of abnormality and are clearly unrelated to, or incidentally related to, the ordinary and typical activities of the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 20

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6365513&loc=d3e15138-107781

Name:	us-gaap_UnusualOrInfrequentItemInsuranceProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Total Proceeds Received related to Insurance Claims since Date of Loss (Detail) - May. 31, 2015 - USD ($)	Total	Total
Unusual or Infrequent Item [Line Items]
Total insurance proceeds	$ 1,248	$ 13,414,000
Property and equipment
Unusual or Infrequent Item [Line Items]
Total insurance proceeds		6,892,000
Business interruption
Unusual or Infrequent Item [Line Items]
Total insurance proceeds		5,521,000
Other expenses
Unusual or Infrequent Item [Line Items]
Total insurance proceeds		$ 1,001,000