Employee Benefits (Defined Benefit Plan, Amounts Recognized in Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Retirement Income Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current liabilities	$ 0	$ 0
Noncurrent liabilities	(59,984)	(100,278)
Total liabilities	(59,984)	(100,278)
Non-Qualified Retirement Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current liabilities	(1,870)	(1,829)
Noncurrent liabilities	(24,028)	(25,412)
Total liabilities	$ (25,898)	$ (27,241)