Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of options granted (in shares)	54,500
Exercise price (in dollars per share)	$ 17.57
Vesting term	4 years 6 months
Contractual term	5 years 6 months
Grant-date fair value (in dollars per share)	$ 6.80
Black-Scholes assumptions:
Expected term	4 years 2 months 12 days
Expected stock price volatility (percent)	48.30%
Risk-free interest rate (percent)	0.61%
Expected dividend yield (percent)	0.00%