Stock Option Plans and Share-Based Compensation Stock option rollforward YTD (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	5 years 3 months 18 days
Number of Shares [Roll Forward]
Beginning balance	4,470	4,693	4,740
Granted	502	645	494
Exercised	(1,686)	(669)	(413)
Expired	(56)	(84)	(86)
Forfeited	(87)	(115)	(42)
Ending balance	3,143	4,470	4,693
Weighted Average Exercise Price [Roll Forward]
Beginning balance	$ 14.06	$ 13.36	$ 12.86
Granted	$ 20.25	$ 14.85	$ 14.57
Exercised	$ 12.53	$ 8.65	$ 8.30
Expired	$ 15.66	$ 14.02	$ 13.59
Forfeited	$ 14.68	$ 21.44	$ 20.76
Ending balance	$ 15.82	$ 14.06	$ 13.36
Additional Disclosures [Abstract]
Vested and expected to vest	3,114
Number Exercisable	2,078
Vested and expected to vest	$ 15.79
Weighted Average Exercise Price of Exercisable Options	$ 15.11
Options outstanding, intrinsic value	$ 30,800,000
Vested and expected to vest, weighted average remaining contratual term	5 years 7 months	5 years 7 months 20 days
Options vested and expected to vest, aggregate intrinsic value	30,600,000
Options exercisable, weighted average remaining contractual term	4 years 1 month
Options exercisable, intrinsic value	22,000,000
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	3,143	4,470	4,693
Weighted Average Exercise Price of Outstanding Options	$ 15.82	$ 14.06	$ 13.36
Number Exercisable	2,078
Weighted Average Exercise Price of Exercisable Options	$ 15.11
Exercise price range, lower range limit	$ 2.70
Exercise price range, upper range limit	$ 29.16
Grants in period, weighted average grant date fair value	$ 8.09	$ 6.13	$ 6.47
Exercises in period, total intrinsic value	14,000,000	2,800,000	2,900,000
$2.70 - $9.25 [Member]
Number of Shares [Roll Forward]
Ending balance	332
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 8.71
Additional Disclosures [Abstract]
Number Exercisable	332
Weighted Average Exercise Price of Exercisable Options	$ 8.71
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	332
Weighted Average Exercise Price of Outstanding Options	$ 8.71
Number Exercisable	332
Weighted Average Exercise Price of Exercisable Options	$ 8.71
Exercise price range, lower range limit	$ 2.70
Exercise price range, upper range limit	$ 9.25
$9.34 - $10.58 [Member]
Number of Shares [Roll Forward]
Ending balance	384
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 10.65
Additional Disclosures [Abstract]
Number Exercisable	384
Weighted Average Exercise Price of Exercisable Options	$ 10.65
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	384
Weighted Average Exercise Price of Outstanding Options	$ 10.65
Number Exercisable	384
Weighted Average Exercise Price of Exercisable Options	$ 10.65
Exercise price range, lower range limit	$ 9.34
Exercise price range, upper range limit	$ 10.58
$10.60 - $11.58 [Member]
Number of Shares [Roll Forward]
Ending balance	347
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 12.84
Additional Disclosures [Abstract]
Number Exercisable	291
Weighted Average Exercise Price of Exercisable Options	$ 12.77
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	347
Weighted Average Exercise Price of Outstanding Options	$ 12.84
Number Exercisable	291
Weighted Average Exercise Price of Exercisable Options	$ 12.77
Exercise price range, lower range limit	$ 10.60
Exercise price range, upper range limit	$ 11.58
$11.66 - $13.16 [Member]
Number of Shares [Roll Forward]
Ending balance	358
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 13.86
Additional Disclosures [Abstract]
Number Exercisable	143
Weighted Average Exercise Price of Exercisable Options	$ 13.94
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	358
Weighted Average Exercise Price of Outstanding Options	$ 13.86
Number Exercisable	143
Weighted Average Exercise Price of Exercisable Options	$ 13.94
Exercise price range, lower range limit	$ 11.66
Exercise price range, upper range limit	$ 13.16
$13.33 - $13.74 [Member]
Number of Shares [Roll Forward]
Ending balance	364
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 14.58
Additional Disclosures [Abstract]
Number Exercisable	167
Weighted Average Exercise Price of Exercisable Options	$ 14.67
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	364
Weighted Average Exercise Price of Outstanding Options	$ 14.58
Number Exercisable	167
Weighted Average Exercise Price of Exercisable Options	$ 14.67
Exercise price range, lower range limit	$ 13.33
Exercise price range, upper range limit	$ 13.74
$13.88 - $14.38 [Member]
Number of Shares [Roll Forward]
Ending balance	382
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 16.79
Additional Disclosures [Abstract]
Number Exercisable	106
Weighted Average Exercise Price of Exercisable Options	$ 16.51
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	382
Weighted Average Exercise Price of Outstanding Options	$ 16.79
Number Exercisable	106
Weighted Average Exercise Price of Exercisable Options	$ 16.51
Exercise price range, lower range limit	$ 13.88
Exercise price range, upper range limit	$ 14.38
$14.42 - $16.70 [Member]
Number of Shares [Roll Forward]
Ending balance	434
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 19.84
Additional Disclosures [Abstract]
Number Exercisable	369
Weighted Average Exercise Price of Exercisable Options	$ 20.12
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	434
Weighted Average Exercise Price of Outstanding Options	$ 19.84
Number Exercisable	369
Weighted Average Exercise Price of Exercisable Options	$ 20.12
Exercise price range, lower range limit	$ 14.42
Exercise price range, upper range limit	$ 16.70
$16.73 - $20.95 [Member]
Number of Shares [Roll Forward]
Ending balance	330
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 22.52
Additional Disclosures [Abstract]
Number Exercisable	104
Weighted Average Exercise Price of Exercisable Options	$ 21.50
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	330
Weighted Average Exercise Price of Outstanding Options	$ 22.52
Number Exercisable	104
Weighted Average Exercise Price of Exercisable Options	$ 21.50
Exercise price range, lower range limit	$ 16.73
Exercise price range, upper range limit	$ 20.95
$21.07 - $26.99 [Member]
Number of Shares [Roll Forward]
Ending balance	136
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 24.61
Additional Disclosures [Abstract]
Number Exercisable	106
Weighted Average Exercise Price of Exercisable Options	$ 24.76
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	136
Weighted Average Exercise Price of Outstanding Options	$ 24.61
Number Exercisable	106
Weighted Average Exercise Price of Exercisable Options	$ 24.76
Exercise price range, lower range limit	$ 21.07
Exercise price range, upper range limit	$ 26.99
$29.16 - $29.16 [Member]
Number of Shares [Roll Forward]
Ending balance	76
Weighted Average Exercise Price [Roll Forward]
Ending balance	$ 29.16
Additional Disclosures [Abstract]
Number Exercisable	76
Weighted Average Exercise Price of Exercisable Options	$ 29.16
Share-based Compensation, Exercise Price Range [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	76
Weighted Average Exercise Price of Outstanding Options	$ 29.16
Number Exercisable	76
Weighted Average Exercise Price of Exercisable Options	$ 29.16
Exercise price range, lower range limit	$ 29.16
Exercise price range, upper range limit	$ 29.16
Stock Options [Member]
Share-based Compensation, Exercise Price Range [Abstract]
Total compensation cost not yet recognized	$ 7,100,000.00