Share-Based Compensation Stock Option Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning, options	8,156,269	7,960,170	7,883,805
Granted, options	700,300	1,494,250	2,165,056
Exercised, options	(522,218)	(415,156)	(1,246,435)
Canceled, options	(821,263)	(882,995)	(842,256)
Outstanding, ending, options	7,513,088	8,156,269	7,960,170	7,883,805
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning, weighted average exercise price	$ 10.25	$ 10.26	$ 9.65
Granted, weighted average exercise price	$ 9.96	$ 10.13	$ 12.14
Exercised, weighted average exercise price	$ 7.62	$ 7.91	$ 9.39
Canceled, weighted average exercise price	$ 10.92	$ 11.22	$ 10.64
Outstanding, ending, weighted average exercise price	$ 10.34	$ 10.25	$ 10.26	$ 9.65
Exercisable, options	4,286,232	4,068,071	3,366,610	3,430,038
Exercisable, options, weighted average exercise price	$ 10.12	$ 9.98	$ 10.31	$ 10.74
Exercisable, options, weighted average remaining contractual life	4 years 3 months 20 days	4 years 2 months 13 days	4 years 3 months 20 days	4 years 8 months 16 days