Employee Benefit Plans Assumptions Used to Measure the Projected Benefit Obligations (Details)	Dec. 31, 2012	Dec. 31, 2011
Pension Plans | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.50%
Projected annual salary increases	0.00%	0.00%
Pension Plans | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.75%
Projected annual salary increases	3.00%	3.00%
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate		4.25%