Employee Benefit Plans (Details 5)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Benefit Plan
Weighted Average Assumptions:
Expected Return on Plan Assets	7.50%	7.50%	7.50%
Discount Rate for:
Benefit Obligation	3.99%	4.37%	5.48%
Benefit Cost	4.37%	5.48%	5.95%
Compensation Increase for:
Benefit Obligation	3.00%	3.00%	3.00%
Benefit Cost	3.00%	3.00%	3.00%
Other Benefits Plan
Weighted Average Assumptions:
Expected Return on Plan Assets	7.50%	7.50%
Discount Rate for:
Benefit Obligation	3.99%	4.37%
Benefit Cost	4.37%	5.48%
Compensation Increase for:
Benefit Obligation	3.00%	3.00%
Benefit Cost	3.00%	3.00%
Other Benefit Plan
Weighted Average Assumptions:
Expected Return on Plan Assets			7.50%
Discount Rate for:
Benefit Obligation			5.48%
Benefit Cost			5.95%
Compensation Increase for:
Benefit Obligation			3.00%
Benefit Cost			3.00%