Retirement Plans (Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	1,880	1,739
Expected return on plan assets	(3,326)	(3,027)
Amortization of net actuarial (gain) loss	797	2,157
Net periodic benefit cost (credit)	(649)	869
Supplemental Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	113	101
Amortization of prior service cost (credit)	13	31
Amortization of net actuarial (gain) loss	5	17
Net periodic benefit cost (credit)	131	149
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	8
Interest cost	12	10
Amortization of prior service cost (credit)	0	(37)
Amortization of net actuarial (gain) loss	(18)	(19)
Net periodic benefit cost (credit)	$ 2	$ (38)