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Stock-Based Compensation (Stock Appreciation Rights Valuation Assumptions) (Details) (Stock Appreciation Rights (SARs) [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Stock Appreciation Rights (SARs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00% 0.00%
Expected weighted-average volatility 49.50% 47.80%
Risk-free interest rate 2.84% 1.65%
Expected term of SARs (in years) 9 years 10 years 3 months