Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	$ (1,815)
Unrealized gains (losses)	4
Amounts reclassified from AOCI	856
Balance at March 31, 2016	(955)
Derivative Instruments [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	325
Unrealized gains (losses)	1
Amounts reclassified from AOCI	(144)
Balance at March 31, 2016	182
Pension, Postretirement and Other Postemployment Benefits [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	(721)
Unrealized gains (losses)	0
Amounts reclassified from AOCI	(857)
Balance at March 31, 2016	(1,578)
Available-for-Sale Securities [Member]
Accumulated Other Comprenhensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	(1,419)
Unrealized gains (losses)	3
Amounts reclassified from AOCI	1,857
Balance at March 31, 2016	$ 441