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Long-Term Debt - Interest rates (Details) - Credit Agreement	3 Months Ended
	May 31, 2017	May 31, 2016
Minimum
Revolving Line of Credit
Interest rate range during each year (as a percent)	2.30%	1.90%
Maximum
Revolving Line of Credit
Interest rate range during each year (as a percent)	4.50%	4.00%

X

- Definition

The effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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