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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

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