Net Periodic Benefit Costs (Schedule Of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 51	$ 51
Expected return on plan assets	(77)	(76)
Amortization of the net loss	17	5
Net periodic cost (benefit)	(9)	(20)
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	48	42
Interest cost	37	40
Amortization of prior service cost	7	8
Amortization of the net loss	31	21
Net periodic cost (benefit)	$ 123	$ 111