Pension And Postretirement Obligations (Components Of Net Periodic Cost (Gain)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 190	$ 192	$ 380	$ 383
Expected return on plan assets	(219)	(219)	(438)	(438)
Amortization of prior service cost	14	14	28	28
Amortization of net loss	227	231	454	463
Net periodic benefit cost (gain)	212	218	424	436
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	4	7	8
Interest cost	57	54	113	108
Expected return on plan assets	(44)	(43)	(87)	(86)
Amortization of transition asset	7	7	14	14
Amortization of prior service cost	(82)	(83)	(165)	(165)
Amortization of net loss	33	34	66	67
Net periodic benefit cost (gain)	$ (26)	$ (27)	$ (52)	$ (54)