Stock-Based Compensation Stock Option Black Scholes Option Pricing Model Assumptions (Details) (Employee Stock Option [Member])	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013	Jun. 30, 2012
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%	0.00%
Expected volatility	0.00%	[1]	0.00%	[1]	38.10%	42.70%
Risk-free interest rate	0.00%	[1]	0.00%	[1]	1.00%	0.90%
Expected term (years)	0 years	[1]	0 years	[1]	5 years 5 months 11 days	5 years 1 month 21 days

[1] There were no employee stock options granted for the three months ended June 30, 2013 and 2012.