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Employee Benefit Plans (Schedule of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefit Plans [Abstract]
Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	4.40%	5.50%
Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		3.00%	4.00%
Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.40%	5.50%	6.00%
Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.00%	7.00%	7.00%
Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.00%	3.00%	4.00%

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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