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Equity-Based Compensation Plans (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Weighted-average fair values of the Company's stock options granted      
Weighted average fair value of options granted $ 6.02 $ 4.32 $ 3.46
Risk-free interest rate     0.91%
Expected volatility     60.00%
Contractual life 7 years 7 years 7 years
Expected dividend yield 0.00% 0.00% 0.00%
Maximum [Member]
     
Weighted-average fair values of the Company's stock options granted      
Risk-free interest rate 0.54% 0.95%  
Expected volatility 79.00% 65.00%  
Expected life 5 years 5 months 5 years 5 months 6 years 6 months
Minimum [Member]
     
Weighted-average fair values of the Company's stock options granted      
Risk-free interest rate 0.29% 0.77%  
Expected volatility 76.00% 64.00%  
Expected life 3 years 5 months 3 years 5 months 4 years 6 months