Stock-Based Compensation (Weighted Average Assumptions) (Details) (Stock Options [Member])	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%		0.00%
Risk-free interest rate	0.90%	[1]	1.00%	[1]
Expected volatility	41.65%	[2]	42.81%	[2]
Expected life	5 years 5 months 19 days	[3]	5 years 5 months 15 days	[3]

[1] The risk-free interest rate for the periods within the contractual term of the options is based on the U.S. Treasury yield curve in effect at the time of the grant.

[2] The expected volatility is a measure of the amount by which a stock price has fluctuated or is expected to fluctuate based primarily on our and our peers' historical data at the time of the grant.

[3] The expected life is the period of time, on average, that participants are expected to hold their options before exercise based primarily on our historical data at the time of grant.