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Segment Information - Net Sales by Product Family- Excluding Intercompany Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 691,146	$ 632,470	$ 1,299,626	$ 1,162,416
Pointing Devices
Segment Reporting Information [Line Items]
Net sales	128,337	123,643	256,127	245,717
Keyboards & Combos
Segment Reporting Information [Line Items]
Net sales	131,872	119,200	260,094	235,313
PC Webcams
Segment Reporting Information [Line Items]
Net sales	28,221	27,466	57,895	53,091
Tablet & Other Accessories
Segment Reporting Information [Line Items]
Net sales	36,710	30,784	69,146	54,002
Video Collaboration
Segment Reporting Information [Line Items]
Net sales	57,176	46,139	115,968	81,756
Mobile Speakers
Segment Reporting Information [Line Items]
Net sales	77,100	90,548	111,427	153,466
Audio & Wearables
Segment Reporting Information [Line Items]
Net sales	61,560	62,445	113,714	112,647
Gaming
Segment Reporting Information [Line Items]
Net sales	160,792	113,722	296,818	191,430
Smart Home
Segment Reporting Information [Line Items]
Net sales	9,241	18,323	18,252	34,789
Other
Segment Reporting Information [Line Items]
Net sales	$ 137	$ 200	$ 185	$ 205

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
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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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