Employee Benefits (Schedule Of Net Benefit Costs And Amounts Recognized In Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,091	$ 1,005	$ 930
Interest cost	2,047	2,580	2,723
Expected return on plan assets	(2,854)	(2,490)	(2,279)
Net amortization	2,255	2,071	1,567
Net periodic benefit cost	2,539	3,166	2,941
Net loss (gain) emerging	(12,468)	7,765	5,804
Curtailment	0	(5,484)	0
Net loss	(1,958)	(1,774)	(1,271)
Amortization of transition obligations	0	0	0
Amortization of prior service cost	(297)	(297)	(296)
Total recognized in OCI	(14,723)	210	4,237
Total net periodic benefit cost and OCI	(12,184)	3,376	7,178
Post-Retirement Healthcare Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	30	9	16
Interest cost	623	745	840
Expected return on plan assets	0	0	0
Net amortization	457	269	418
Net periodic benefit cost	1,110	1,023	1,274
Net loss (gain) emerging	(501)	2,021	816
Net loss	(373)	(185)	(118)
Amortization of transition obligations	0	0	(114)
Amortization of prior service cost	(84)	(84)	(186)
Total recognized in OCI	(958)	1,752	398
Total net periodic benefit cost and OCI	$ 152	$ 2,775	$ 1,672