Employee Benefit Plans (Schedule Of Stock Option Activity) (Details) (Stock Options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Beginning Balance (in shares)	4,165
Number of Shares, Granted (in shares)	397
Number of Shares, Exercised (in shares)	(402)
Number of Shares, Cancelled (in shares)	(86)
Number of shares, expired (in shares)	(135)
Number of Shares, Ending Balance (in shares)	3,939
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning Balance (in dollars per share)	$ 30.11
Grants (in dollars per share)	$ 32.77
Exercises (in dollars per share)	$ 24.86
Cancelled (in dollars per share)	$ 35.22
Expired (in dollars per share)	$ 36.52
Ending Balance (in dollars per share)	$ 30.58
Outstanding, Weighted Average Remaining Contractual Term	6 years 0 months 0 days
Outstanding, Intrinsic Value	$ 20,902
Vested and Expected to Vest, Number	3,829
Vested and Expected to Vest, Weighted Average Exercise Price	$ 30.51
Vested and Expected to Vest, Weighted Average Remaining Contractual Term	5 years 10 months 25 days
Vested and Expected to Vest, Aggregate Intrinsic Value	20,598
Exercisable, Number	2,892
Exercisable, Weighted Average Exercise Price	$ 29.65
Exercisable, Weighted Average Remaining Contractual Term	5 years 1 month 6 days
Exercisable, Intrinsic Value	$ 18,121