Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 14,900,000	$ 14,100,000	$ 13,600,000
Return On Plan Assets Over Last 15 Years	6.99%
Employer contributions	$ 0	$ 0
Assumed discount rate (percent)	4.00%	4.75%	5.50%
Assumed rate of salary increases	4.00%	4.00%	4.50%
Expected long-term rate of return on plan assets (percent)	7.25%	7.50%	7.75%
Return On Plan Assets Over Last 10 Years	8.39%
Return Plan Assets Over Last 5 Years	13.37%
Percent Of Employee Contribution Match To 401 K	75.00%