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Segment Information (Net Sales by Product Categories) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | $ 2,566,863 | $ 2,221,427 | $ 2,018,100
Mobile Speakers |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 314,817 | 301,021 | 229,718
Audio-PC & Wearables |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 252,330 | 246,390 | 196,013
Gaming |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 491,995 | 314,362 | 245,101
Video Collaboration |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 182,717 | 127,009 | 89,322
Smart Home |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 89,373 | 65,510 | 59,075
Pointing Devices |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 516,637 | 501,562 | 492,543
Keyboards & Combos |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 498,472 | 480,312 | 430,190
Tablet & Other Accessories |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 107,942 | 76,879 | 103,886
PC Webcams |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 112,147 | 107,087 | 98,641
Other |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 433 | 1,295 | 2,570
Total Net Retail Sales |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 2,566,863 | 2,221,427 | 1,947,059
OEM |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | $ 0 | $ 0 | $ 71,041

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