Share-Based Compensation (Summary of Stock Option Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Shares [Roll Forward]
Outstanding, beginning of period (in shares)	932,053
Granted (in shares)	9,000
Exercised (in shares)	(34,325)
Forfeited or Expired (in shares)	(14,200)
Outstanding, end of period (in shares)	892,528
Exercisable, end of period (in shares)	391,618	375,375
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of period (weighted average exercise price)	$ 10.84
Granted (weighted average exercise price)	$ 28.42
Exercised (weighted average exercise price)	$ 9.89
Forfeited or Expired (weighted average exercise price)	$ 20.38
Outstanding, end of period (weighted average exercise price)	$ 10.91
Exercisable, end of period (weighted average exercise price)	$ 8.44	$ 7.31