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Subsequent Events - Additional Information (Detail)
€ in Thousands, ¥ in Thousands, shares in Thousands, $ in Thousands
May. 16, 2016
CNY (¥)
Mar. 28, 2016
CNY (¥)
Mar. 15, 2016
EUR (€)
MW
Sep. 01, 2015
USD ($)
Sep. 01, 2015
CNY (¥)
May. 10, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2015
EUR (€)
Dec. 31, 2014
USD ($)
Subsequent Event [Line Items]                    
Other current liabilities | $             $ 71,379     $ 33,762
Sinsin Group Settlement Agreement                    
Subsequent Event [Line Items]                    
Other current liabilities             46,038   € 42,396  
Sinsin Group Settlement Agreement | Payment schedule before April 15, 2016                    
Subsequent Event [Line Items]                    
Other current liabilities | €                 3,283  
Sinsin Group Settlement Agreement | Payment Schedule on or before November 30,2017                    
Subsequent Event [Line Items]                    
Other current liabilities | €                 € 39,113  
Kangfu Leasing                    
Subsequent Event [Line Items]                    
Sales-leaseback, amount due             $ 26,311 ¥ 140,000    
Subsequent Events                    
Subsequent Event [Line Items]                    
Commitments from Shareholders to acquire common stock, shares | shares           75,990        
Commitments from shareholders to acquire common stock, value | $           $ 57,680        
Subsequent Events | Sinsin Group Settlement Agreement                    
Subsequent Event [Line Items]                    
Payment for business acquisition | €     € 3,283              
Annual interest rate     6.00%              
Power capacity of PV plant to be pledged | MW     26.57              
Subsequent Events | Kangfu Leasing                    
Subsequent Event [Line Items]                    
Sales-leaseback, proceeds from transaction | ¥   ¥ 140,000                
Sales-leaseback, interest rate   6.125%                
Sales-leaseback, lease term   10 years                
Sale-leaseback, nominal fee to transfer title | ¥   ¥ 10,000                
Sales-leaseback, payment | ¥ ¥ 140,000                  
Dingding Yiwei                    
Subsequent Event [Line Items]                    
Business acquisition, percentage of voting interests acquired       60.00% 60.00%          
Aggregate consideration       $ 4,720 ¥ 30,000