Stock-Based Compensation - Valuation Assumptions (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Schedule of Black-Scholes Assumptions
Weighted average fair value of grants	$ 10.04	[1]	$ 0.00	[1]	$ 9.26	[1]	$ 9.65	[1]
Risk-free interest rate	0.73%		0.00%		0.95%		0.86%
Expected volatility	52.38%		0.00%		53.39%		55.25%
Expected life in years	5 years 2 months 12 days		0 years		5 years 2 months 12 days		5 years 1 month 21 days

[1] The weighted average fair value of grants was calculated utilizing the stock options granted during each respective period.