Income Taxes (Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Employee pensions and other benefits	$ 3,285	$ 3,823
State net operating loss carryforward	1,231	687
Accrued liabilities		322
Other	405	564
Total deferred income tax assets	4,921	5,396
Valuation allowance	(1,271)	(693)
Property, plant and equipment	2,536	6,020
Other	(28)	913
Total deferred income tax liabilities	2,508	6,933
Net deferred income tax assets (liabilities)	$ 1,142	$ (2,230)