Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2012 2012 Incentive Plan [Member]	Dec. 31, 2012 2003 Stock and Incentive Plan [Member]	Dec. 31, 2011 2003 Stock and Incentive Plan [Member]
Weighted average assumptions used to estimate fair value of stock options granted under the Stock and Incentive Plan
Stock option pricing model		Binomial Lattice	Black Scholes Merton	Black Scholes Merton	Black Scholes Merton
Expected option life		5 years 4 months 28 days	4 years 5 months 9 days	10 months 21 days	1 year 15 days
Risk-free interest rate		2.58%	0.71%	0.25%	0.37%
Volatility		46.17%	71.16%	54.28%	61.41%
Dividend yield		0.00%	0.00%	0.00%	0.00%
Estimated forfeiture rate		11.15%	5.46%	0.70%	1.04%
Weighted average fair value of stock option awards granted during the year	$ 5.95	$ 3.02