Stock-Based Compensation (Risk-Free Interest Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-Based Compensation [Abstract]
Risk-free interest rate	1.50%	0.60%	0.90%
Expected volatility	38.60%	58.20%	58.10%
Expected term	5 years	5 years	5 years