Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Beginning Balance	$ (1,815)
Ending Balance	(1,706)
Derivative Instruments [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Beginning Balance	325
Unrealized gains (losses)	(138)
Amounts reclassified from AOCI	(316)
Ending Balance	(129)
Pension, Postretirement and Other Postemployment Benefits [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Beginning Balance	(721)
Unrealized gains (losses)	0
Amounts reclassified from AOCI	(1,363)
Ending Balance	(2,084)
Available-for-Sale Securities [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Beginning Balance	(1,419)
Unrealized gains (losses)	701
Amounts reclassified from AOCI	1,225
Ending Balance	507
Accumulated Other Comprehensive Income[Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Beginning Balance	(1,815)
Unrealized gains (losses)	563
Amounts reclassified from AOCI	(454)
Ending Balance	$ (1,706)