Stock-Based Compensation - Valuation Assumptions (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average fair value of grants	$ 0.00	[1]	$ 10.04	[1]	$ 13.64	[1]	$ 9.26	[1]
Risk-free interest rate	0.00%		0.73%		1.29%		0.95%
Expected volatility	0.00%		52.38%		44.84%		53.39%
Expected life in years	0 years		5 years 2 months 12 days		4 years 6 months 21 days		5 years 2 months 12 days

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