Nonpension Postretirement Benefits (Amounts Recognized in Balance Sheet) (Details) (Nonpension Postretirement Benefit Plans, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current liability	$ 4,758	$ 4,739
Long-term liability	59,065	71,468
Net accrued benefit liability	$ 63,823	$ 76,207