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Segment Information - Net Sales by Product Family- Excluding Intercompany Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 864,388	$ 812,021	$ 2,164,014	$ 1,974,437
Pointing Devices
Segment Reporting Information [Line Items]
Net sales	149,123	140,983	405,250	386,700
Keyboards & Combos
Segment Reporting Information [Line Items]
Net sales	144,169	126,372	404,263	361,685
PC Webcams
Segment Reporting Information [Line Items]
Net sales	33,021	27,280	90,916	80,370
Tablet & Other Accessories
Segment Reporting Information [Line Items]
Net sales	35,757	26,648	104,903	80,650
Video Collaboration
Segment Reporting Information [Line Items]
Net sales	74,186	46,252	190,154	128,008
Mobile Speakers
Segment Reporting Information [Line Items]
Net sales	96,263	147,377	207,690	300,843
Audio & Wearables
Segment Reporting Information [Line Items]
Net sales	98,629	84,435	212,343	197,083
Gaming
Segment Reporting Information [Line Items]
Net sales	213,663	173,802	510,481	365,232
Smart Home
Segment Reporting Information [Line Items]
Net sales	19,577	38,692	37,829	73,481
Other
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 180	$ 185	$ 385

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
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-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 32
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-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 22
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-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

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