Defined Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 8	$ 8	$ 25	$ 25
Interest Cost	11	13	34	38
Amortization of prior service cost	4	6	11	15
Net periodic postretirement benefit cost	23	27	70	78
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	3	3	9	10
Interest Cost	8	9	24	28
Amortization of prior service cost		1		1
Net periodic postretirement benefit cost	$ 11	$ 13	$ 33	$ 39