Comprehensive Income (Loss) (Accumulated Other Comprehensive Loss, Net of Tax) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	$ (532)	$ (411)
Amounts reclassified from accumulated other comprehensive loss	13	9
Net current-period other comprehensive income (loss)	13	9
Balance, ending	(519)	(402)
Postretirement Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(119)	(5)
Amounts reclassified from accumulated other comprehensive loss	3	(1)
Net current-period other comprehensive income (loss)	3	(1)
Balance, ending	(116)	(6)
Deferred Taxes On Pension And OPEB Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	247	156
Other comprehensive income before reclassifications	(2)
Amounts reclassified from accumulated other comprehensive loss	(6)	(3)
Net current-period other comprehensive income (loss)	(8)	(3)
Balance, ending	239	153
All Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(404)	(260)
Other comprehensive income before reclassifications	(2)
Amounts reclassified from accumulated other comprehensive loss	10	5
Net current-period other comprehensive income (loss)	8	5
Balance, ending	$ (396)	$ (255)