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Equity Compensation Plans and Equity (Details) (USD $)
 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Inducement Plan
Dec. 10, 2013
Inducement Plan
Maximum
Dec. 10, 2013
2010 Stock Incentive Plan
Dec. 31, 2013
2010 Stock Incentive Plan
Dec. 10, 2013
2010 Stock Incentive Plan
Maximum
Dec. 31, 2013
2000 Stock Incentive Plan
Dec. 31, 2013
2000 Stock Incentive Plan
Minimum
Dec. 31, 2013
2000 Stock Incentive Plan
Maximum
Dec. 31, 2011
CIGS Solar Systems Business
Dec. 31, 2013
Stock options
Dec. 31, 2012
Stock options
Dec. 31, 2011
Stock options
Dec. 31, 2013
Stock options
Inducement Plan
Dec. 31, 2013
Stock options
2010 Stock Incentive Plan
Dec. 31, 2013
Stock options
2010 Stock Incentive Plan
Minimum
Dec. 31, 2013
Stock options
2010 Stock Incentive Plan
Maximum
Dec. 31, 2013
Restricted Stock and Restricted Stock Units
Dec. 31, 2012
Restricted Stock and Restricted Stock Units
Dec. 31, 2011
Restricted Stock and Restricted Stock Units
Dec. 31, 2013
Restricted Stock and Restricted Stock Units
Key employees
Dec. 31, 2013
Restricted Stock
Dec. 31, 2013
Restricted Stock
Non-employee members of the Board of Directors
Dec. 31, 2013
Restricted Stock
Non-employee members of the Board of Directors
Maximum
Dec. 31, 2013
Restricted Stock
2010 Stock Incentive Plan
Minimum
Dec. 31, 2013
Restricted Stock
2010 Stock Incentive Plan
Maximum
Dec. 31, 2013
Restricted stock units
Inducement Plan
Dec. 31, 2013
Restricted stock units
Inducement Plan
Minimum
Dec. 31, 2013
Restricted stock units
Inducement Plan
Maximum
Equity Compensation Plans                                                              
Stock issued (in shares)                               124,500                         87,000    
Maximum number of shares authorized to be issued             6,750,000                                                
Number of additional shares authorized           3,250,000                                                  
Common stock available for issuance (in shares)             0 2,995,000                                              
Awards granted (in shares)         255,000                                                    
Vesting period                   2 years 5 years         3 years 3 years           4 years     1 year 1 year 5 years   2 years 4 years
Term of awards                               10 years   7 years 10 years                        
Number of options outstanding (in shares)       124,500         727,552       2,598,000 2,322,000     1,746,092                            
Awards granted (in shares)                         539,000                                    
Awards granted (in shares)                                       798,000     797,583   16,165            
Expiration term                 7 years                                            
Equity compensation expense $ 13,130,000 $ 13,854,000 $ 12,807,000                 $ 700,000                                      
Unrecognized equity-based compensation costs                         12,300,000             33,200,000                      
Period over which unrecognized equity-based compensation costs will be recognized                         2 years 2 months 12 days             3 years 1 month 6 days                      
Assumptions based on which fair value of each option granted was estimated using the Black-Scholes option-pricing model                                                              
Weighted-average expected stock-price volatility (as a percent)                         48.00% 59.00% 55.00%                                
Weighted-average expected option life                         5 years 5 years 4 years                                
Average risk-free interest rate (as a percent)                         1.27% 0.70% 1.40%                                
Average dividend yield (as a percent)                         0.00% 0.00% 0.00%                                
Other disclosures                                                              
Granted (in shares)                                       798,000     797,583   16,165            
Shares cancelled in 2013 due to employees electing to receive fewer shares in lieu of paying withholding taxes                                               71,342              
Total grant date fair value of shares vested                                       $ 7,900,000 $ 5,400,000 $ 9,700,000