Employee Benefit Plans (Amounts Included in Other Comprehensive Loss not Recognized in Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior Service Cost	$ 0
Net Actuarial Loss	14,848
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior Service Cost	0
Net Actuarial Loss	$ 0