Income Taxes (Schedule Of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Deferred tax assets, asset retirement obligation	$ 1,740
Deferred tax assets, post-retirement benefit costs	845
Deferred tax assets, net operating losses	2,043
Deferred tax assets, other		300
Total deferred tax assets	4,628	300
Valuation allowance	(3,582)
Net deferred tax assets	1,046	300
Deferred tax liability, unrealized gain on investments	223
Deferred tax liability, difference between book and tax depreciation	1,847
Deferred tax liability, pension costs	1,031
Deferred tax liability, other	59	402
Total deferred tax liabilities	3,160	402
Net deferred tax asset (liability)	$ (2,114)	$ (102)