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Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 28, 2018 | Feb. 28, 2017 | Feb. 29, 2016
Unrecognized Tax Benefits |  |  |
Total unrecognized tax benefits, beginning balance | $ 6,611 | $ 8,737 |
Resolution of tax dispute | (1,486) |  |
Changes in tax positions taken during a prior period | 88 |  |
Changes in tax positions taken during a prior period |  | (1,260) |
Changes due to lapse in statute of limitations | (890) | (218) |
Impact of foreign currency remeasurement on unrecognized tax benefits in the current period |  | (133) |
Impact of foreign currency remeasurement on unrecognized tax benefits in the current period | 218 |  |
Settlements | (113) | (515) |
Total unrecognized tax benefits, ending balance | 4,428 | 6,611 | $ 8,737
Less current unrecognized tax benefits | (1,079) |  |
Noncurrent unrecognized tax benefits | 3,349 | 6,611 |
Unrecognized tax benefits that would affect effective tax rate if recognized | 4,400 |  |
Liability for tax-related interest and penalties included in unrecognized tax benefits | 1,100 | 1,700 |
Tax-related interest and penalties expense included in provisions for income tax | $ (500) | $ (600) | $ 500

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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 + Details
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- Definition 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 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 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 + Details
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