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Income per Common Share - Additional Information (Detail)	3 Months Ended
	May 31, 2018 shares
Employee Stock Incentive Plan [Member]
Earnings Per Share Basic And Diluted [Line Items]
Number of outstanding options excluded from computation of diluted earnings per share	51,636

X

- Definition

Earnings Per Share Basic And Diluted [Line Items]

+ References

No definition available.

+ Details

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X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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