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Share-Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Share Based Compensation Allocation of Recognized Period Costs        
Share-based compensation expense, Total $ 695 $ 231 $ 1,275 $ 449
Cost of Sales [Member]
       
Share Based Compensation Allocation of Recognized Period Costs        
Share-based compensation expense, Total 57 4 142 9
Selling, General and Administrative Expenses [Member]
       
Share Based Compensation Allocation of Recognized Period Costs        
Share-based compensation expense, Total $ 638 $ 227 $ 1,133 $ 440