Retirement Plan (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		$ 30,893,000
Net change in post-retirement benefit obligations	0	28,986,000	0	28,986,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Transition Costs	$ 2,900,000	$ 2,900,000	$ 5,500,000	$ 5,800,000