Stock-Based Compensation (Weighted Average Assumptions) (Details) (Stock Options [Member])	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
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	1.74%	[1]	0.90%	[1]
Expected volatility	37.92%	[2]	41.65%	[2]
Expected life	5 years 5 months 19 days	[3]	5 years 6 months	[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.

[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.