Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 22,411	$ 13,151	$ 114,512	$ 1,919
Net gains (losses) from foreign currency translation	(382)	(723)	(2,129)	154
Net unrealized holding gains on available-for-sale investments				11
Total comprehensive income	$ 22,029	$ 12,428	$ 112,383	$ 2,084

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 5
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 225
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-Subparagraph (SX 210.9-04(22))
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-Topic 944
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-Topic 225
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-Subparagraph (SX 210.5-03(20))
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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (b,c)
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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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