Employee Benefits (Schedule Of Change In Benefit Obligation) (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]
Benefit obligation, beginning of year	$ 65,313	$ 59,876
Service cost	1,091	1,005	930
Interest cost	2,047	2,580	2,723
Actuarial loss (gain)	(8,163)	9,481
Benefits paid	(2,342)	(2,145)
Curtailment	0	(5,484)
Benefit obligation, end of year	57,946	65,313	59,876
Post-Retirement Healthcare Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning of year	21,383	20,212
Service cost	30	9	16
Interest cost	623	745	840
Actuarial loss (gain)	(501)	2,021
Benefits paid	(1,577)	(1,604)
Curtailment	0	0
Benefit obligation, end of year	$ 19,958	$ 21,383	$ 20,212