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SOLAR POWER SYSTEMS, NET (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
SOLAR POWER SYSTEMS      
Accumulated depreciation $ (13,655) $ (14,261)  
Solar power systems, net 112,062 1,200,441  
Transferred solar power systems to project assets 1,362,037 114,131  
Reclassified solar power systems to assets held-for-sale 405,900    
Solar power systems sold from assets held for sale 115,300    
Solar power systems      
SOLAR POWER SYSTEMS      
Depreciation expense 16,492 11,340 $ 1,173
Solar power systems in operation      
SOLAR POWER SYSTEMS      
Solar power systems, gross 120,935 508,584  
Solar power systems under construction      
SOLAR POWER SYSTEMS      
Solar power systems, gross $ 4,782 $ 706,118