Stock Compensation Summary of stock option activity for the period (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at January 1, 2014	1,574,572
Options Granted (in shares)	209,500
Options Exercised, Shares (in shares)	(196,541)
Cancelled or Forfeited (in shares)	(35,752)
Outstanding at March 31, 2014 (in shares)	1,551,779
Exercisable at March 31, 2014 (in shares)	1,105,242
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at January 1, 2014 Average Price (in dollars per share)	$ 12.14
Options granted, average exercise price (in dollars per share)	$ 20.93
Options exercised, average exercise price (in dollars per share)	$ 12.27
Cancelled or forfeited, average exercise price (in dollars per share)	$ 15.48
Outstanding at March 31, 2014 Average Price (in dollars per share)	$ 13.23
Exercisable at March 31, 2014, Average Exercise Price (in dollars per share)	$ 11.62
Outstanding at March 31, 2014 Weighted Average Life	5 years 10 months 25 days
Exercisable at March 31, 2014, Weighted Average Life	4 years 9 months 5 days