Stock-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Outstanding at December 31, 2011	4,083
Stock options, Granted	817
Stock options, Exercised	(850)
Stock options, Forfeited	(546)
Stock Options Outstanding at December 31, 2012	3,504	4,083
Options exercisable, Shares	1,994
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding at December 31, 2011	$ 26.46
Weighted Average Exercise Price / Share, Granted	$ 27.43
Weighted Average Exercise Price / Share, Exercised	$ 25.01
Weighted Average Exercise Price / Share, Forfeited	$ 27.86
Weighted Average Exercise Price, Outstanding at December 31, 2012	$ 26.80	$ 26.46
Options exercisable, Weighted Average Exercise Price	$ 26.71
Weighted Average Remaining Contractual Term, Outstanding	6 years 4 months 24 days	6 years 4 months 24 days
Weighted Average Remaining Contractual Term, Options Granted	10 years
Weighted Average Remaining Contractual Term, Options Exercised	3 years 4 months 24 days
Weighted Average Remaining Contractual Term, Options Forfeited	6 years 1 month 6 days
Weighed average remaining contractual term, Options exercisable	4 years 10 months 24 days