Pension And Postretirement Obligations (Components Of Net Periodic Cost (Gain)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 190	$ 192
Expected return on plan assets	(219)	(219)
Amortization of prior service cost	14	14
Amortization of net loss	227	231
Net periodic benefit cost (gain)	212	218
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	4
Interest cost	56	54
Expected return on plan assets	(43)	(43)
Amortization of transition asset	7	7
Amortization of prior service cost	(83)	(83)
Amortization of net loss	33	34
Net periodic benefit cost (gain)	$ (26)	$ (27)