Balance Sheet Information - Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) $ in Thousands	3 Months Ended
May 31, 2016 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	$ (32,098)
Other comprehensive income before reclassifications	944
Amounts reclassified from AOCI	(273)
Other comprehensive income	671
Ending balance	(19,256)
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,894)
Other comprehensive income before reclassifications	334
Amounts reclassified from AOCI	0
Other comprehensive income	334
Ending balance	(4,560)
Unrealized Gains (Losses) on Available-for- Sale Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	385
Other comprehensive income before reclassifications	610
Amounts reclassified from AOCI	(273)
Other comprehensive income	337
Ending balance	722
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,509)
Ending balance	$ (3,838)

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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