Stock-Based Compensation Stock Option Black Scholes Option Pricing Model Assumptions (Details) - Employee Stock Option [Member]	3 Months Ended			9 Months Ended
	Sep. 30, 2015	[1]	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Dividend yield(1)	0.00%		0.00%	0.00%	0.00%
Expected volatility(1)	0.00%		33.60%	34.50%	39.30%
Risk-free interest rate(1)	0.00%		1.90%	1.70%	1.70%
Expected term (years)(1)	1 day		5 years 5 months 14 days	5 years 5 months 15 days	5 years 5 months 15 days

[1] (1) There were no employee stock options granted for the three months ended September 30, 2015.