Share-Based Compensation (Summary of Stock Option Activity) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Shares [Roll Forward]
Outstanding, beginning of period (in shares)	1,130,910
Granted (in shares)	192,400
Exercised (in shares)	(177,087)
Forfeited or Expired (in shares)	(36,562)
Outstanding, end of period (in shares)	1,109,661
Exercisable, end of period (in shares)	390,127	419,112
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of period (weighted average exercise price)	$ 13.38
Granted (weighted average exercise price)	24.61
Exercised (weighted average exercise price)	7.09
Forfeited or Expired (weighted average exercise price)	20.43
Outstanding, end of period (weighted average exercise price)	16.12
Exercisable, end of period (weighted average exercise price)	$ 8.76	$ 7.20