Retirement Plan (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Pension Contributions	$ 22,700,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0		0	28,986,000	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	8,600,000	30,900,000			7,102,000
Other Comprehensive Income (Loss), Finalization of Pension and Non-Pension Postretirement Plan Valuation, before Tax	1,700,000			1,055,000	4,339,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Amendments	$ 2,700,000		$ 3,200,000	$ 8,500,000	$ 10,100,000