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Income Taxes - (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
subsidiary
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Current [Abstract]      
State $ 4 $ 2 $ 2
Foreign 729 529 213
Total current 733 531 215
Total net provision for income taxes $ 733 $ 531 $ 215
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate [Abstract]      
Statutory federal income tax rate (as a percent) 35.00% 35.00% 35.00%
State income taxes, net of federal tax benefits (as a percent)     (0.20%)
Change in valuation allowance (as a percent) (7.00%) (46.10%) (106.30%)
Stock-based compensation (as a percent) 1.20% (9.40%) (26.10%)
Foreign tax rate differential (as a percent) (12.10%) 29.30% 104.20%
Foreign income tax incentive (as a percent) (13.50%) 24.10% 64.70%
Dividend from unconsolidated affiliates (as a percent) 1.50%    
Dividend from unconsolidated affiliates (as a percent)   (57.80%) (169.80%)
Tax effect in equity method loss or gain from unconsolidated affiliates (as a percent) 8.20% 1.10% 45.60%
Others (as a percent) (0.20%) (0.10%) 14.40%
Effective tax rate (as a percent) 13.10% (23.90%) (38.50%)
Deferred tax assets [Abstract]      
Net operating loss $ 62,459 $ 60,538  
Accruals and reserves not yet deductible 4,520 3,723  
Credits 1,488 1,488  
Deferred tax assets, gross 68,467 65,749  
Net deferred tax assets 68,467 65,749  
Valuation allowance (68,467) (65,749)  
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Gross unrecognized tax benefits beginning balance 14,557 16,403 $ 16,403
Decrease related to lapse of statute of limitations   (1,846)  
Gross unrecognized tax benefits ending balance 14,557 14,557 16,403
(Increase) and decrease in valuation allowance 2,700 4,100  
Non-U.S. income included in income (loss) before tax 15,000 15,200 12,800
Unrecognized tax benefits interest and penalties 0    
Unrecognized tax benefits accrued interest and penalties 0    
Unrecognized tax liabilities of undistributed earnings of foreign subsidiaries 95,300    
Unrecognized tax benefit would favorably impact the effective tax rate in future periods if recognized 14,600    
Majority-Owned Subsidiaries [Member]      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Restricted cash and investments 22,600    
Cash and investments not available for use 16,600    
Wholly Owned China Subsidiary      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Restricted cash and investments 14,500    
Three Partially Owned Consolidated China Subsidiaries      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Restricted cash and investments $ 8,100    
Number of partially owned subsidiaries | subsidiary 3    
Domestic Tax Authority      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Operating loss carryforwards $ 178,400    
Tax credit carryforwards 1,500    
State      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Operating loss carryforwards $ 1,000    
Foreign Tax Authority      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
EIT income tax rate (as a percent) 25.00%    
Preferential tax rate (as a percent) 15.00%    
Benefit from foreign tax rate $ 489 $ 354 $ 143
Renewal Period For Favorable Tax Rate 3 years    
Foreign Tax Authority | Wholly Owned China Subsidiary      
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Benefit from foreign tax rate $ 200