Share-Based Compensation (Summary of Stock Option Activity) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning of period (in shares)	1,115,513
Granted (in shares)	47,500
Exercised (in shares)	(122,345)
Forfeited or Expired (in shares)	(40,575)
Outstanding, end of period (in shares)	1,000,093
Exercisable, end of period (in shares)	476,133	493,050
Outstanding, beginning of period (weighted average exercise price)	$ 10.15
Granted (weighted average exercise price)	$ 17.70
Exercised (weighted average exercise price)	$ 7.93
Forfeited or Expired (weighted average exercise price)	$ 11.80
Outstanding, end of period (weighted average exercise price)	$ 10.70
Exercisable, end of period (weighted average exercise price)	$ 8.59	$ 7.27