Stock Compensation - Stock Compensation Summary of stock option activity for the period (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at December 31, 2012 (in shares)	1,919,021	1,997,778
Outstanding at December 31, 2012 Average Price (in dollars per share)	$ 11.63
Options Granted (in shares)	323,400	323,950	365,025
Options Granted, Average Exercise Price (in dollars per share)	$ 14.77	$ 12.96
Options Exercised, Shares (in shares)	(503,321)	(288,794)	(59,031)
Options Exercised, Average Exercise Price (in dollars per share)	$ 11.34
Cancelled or Forfeited (in shares)	(164,528)	(113,913)	(153,426)
Cancelled or Forfeited, Average Exercise Price (in dollars per share)	$ 13.89
Outstanding at December 31, 2013 (in shares)	1,574,572	1,919,021	1,997,778
Outstanding at December 31, 2013 Average Price (in dollars per share)	$ 12.14	$ 11.63
Outstanding at December 31, 2013 Weighted Average Life (in years)	5 years 11 months 23 days
Aggregate Intrinsic Value December 31, 2013	$ 14,142
Exercisable at December 31, 2013 (in shares)	1,057,694	1,355,112	1,429,040
Exercisable at December 31, 2013, Average Exercise Price (in dollars per share)	$ 11.48	$ 11.63	$ 11.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term	4 years 8 months 23 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 10,194
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Granted, Average Exercise Price (in dollars per share)			$ 10.10
Options Exercised, Average Exercise Price (in dollars per share)	$ 8.00	$ 8.00	$ 8.00
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Granted, Average Exercise Price (in dollars per share)			$ 10.28
Options Exercised, Average Exercise Price (in dollars per share)	$ 18.62	$ 12.55	$ 12.55