Stock-Based Compensation Stock Option Black Scholes Option Pricing Model Assumptions (Details) (Employee Stock Option [Member])	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Employee Stock Option [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Dividend yield	0.00%	[1]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Expected volatility	0.00%	[1]	45.80%	[1]	42.70%		46.40%
Risk free interest rate	0.00%	[1]	0.90%	[1]	0.90%		1.70%
Expected life (years)	0	[1]	4.91	[1]	5.14		4.86

[1] There were no employee stock options granted for the three months ended September 30, 2012.