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Stock Based Compensation (Details 2)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Valuation of the options granted      
Options Issued 1,024 1,169 1,565
Weighted Avg. Volatility 65.00% 47.00% 58.00%
Expected Term 2 years 6 months 2 years 6 months 2 years 6 months
Risk Free Interest Rate 0.50% 0.80% 2.60%
Expected Dividend Yield 0.00% 0.00% 0.00%