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SEGMENT INFORMATION - Each product or service (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues generated from each product |  |  |
Total net revenues | $ 2,853,078 | $ 3,467,626 | $ 2,960,627
Solar power products |  |  |
Revenues generated from each product |  |  |
Total net revenues | 2,573,685 | 2,303,287 | 1,550,386
Solar system kits |  |  |
Revenues generated from each product |  |  |
Total net revenues | 86,794 | 93,406 | 104,215
Solar power projects |  |  |
Revenues generated from each product |  |  |
Total net revenues | 22,665 | 557,995 | 891,920
EPC and development services |  |  |
Revenues generated from each product |  |  |
Total net revenues | 11,990 | 385,882 | 316,572
Electricity |  |  |
Revenues generated from each product |  |  |
Total net revenues | 68,789 | 32,059 | 2,863
O&M services |  |  |
Revenues generated from each product |  |  |
Total net revenues | 4,128 | 3,310 | 1,544
Others |  |  |
Revenues generated from each product |  |  |
Total net revenues | $ 85,027 | $ 91,687 | $ 93,127

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