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Segment Information (Net Sales by Product Categories) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | $ 2,221,427 | $ 2,018,100 | $ 2,004,908
Mobile Speakers |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 301,021 | 229,718 | 178,038
Audio-PC & Wearables |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 246,390 | 196,013 | 213,496
Gaming |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 314,362 | 245,101 | 211,911
Video Collaboration |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 127,009 | 89,322 | 62,215
Home Control |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 65,510 | 59,075 | 68,060
Pointing Devices |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 501,562 | 492,543 | 487,210
Keyboards & Combos |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 480,312 | 430,190 | 426,117
Tablet & Other Accessories |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 76,879 | 103,886 | 140,994
PC Webcams |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 107,087 | 98,641 | 96,680
Other |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 1,295 | 2,570 | 2,725
Total net retail sales |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | 2,221,427 | 1,947,059 | 1,887,446
OEM |  |  |
Net sales to unaffiliated customers and long-lived assets by geographic region |  |  |
Total net sales | $ 0 | $ 71,041 | $ 117,462

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