Pension And Other Post-Retirement Benefits (Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 544	$ 870
Interest cost	3,341	3,106
Expected return on plan assets	(4,558)	(4,329)
Amortization of prior service costs, gains or losses and net transition asset	2,814	3,690
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	81	0
Net periodic benefit cost	2,222	3,337
Other Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	13	18
Interest cost	93	89
Expected return on plan assets		0
Amortization of prior service costs, gains or losses and net transition asset	(77)	(41)
Net periodic benefit cost	$ 29	$ 66