Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Unrecognized Tax Benefits
Total unrecognized tax benefits, beginning balance	$ 8,737	$ 10,295
Resolution of tax dispute	(1,381)
Changes in tax positions taken during a prior period	121	278
Changes due to lapse in statute of limitations	(218)	(1,375)
Impact of foreign currency remeasurement on unrecognized tax benefits in the current period	133	421
Settlements	515	40
Total unrecognized tax benefits, ending balance	6,611	8,737	$ 10,295
Less current unrecognized tax benefits		(536)
Noncurrent unrecognized tax benefits	6,611	8,201
Unrecognized tax benefits that would affect effective tax rate if recognized	6,600
Liability for tax-related interest and penalties included in unrecognized tax benefits	1,700	2,300
Tax-related interest and penalties expense included in provisions for income tax	$ (600)	$ 500	$ 200

Amount of decrease in unrecognized tax benefits resulting from resolution of tax dispute.

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- Definition

Amount recognized for uncertainty in income taxes classified as current.

+ 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 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount recognized for uncertainty in income taxes classified as noncurrent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 210
-SubTopic 10
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of interest expense accrued for an underpayment of income taxes.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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