Pensions and Other Employee Benefits Plans (Components of Net Periodic Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 192	$ 197	$ 334	$ 256
Interest cost	501	475	991	948
Expected return on plan assets	(511)	(516)	(1,023)	(1,054)
Amortization of net actuarial loss	248	193	444	398
Net periodic cost	430	349	746	548
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	5	15	10	27
Recognition due to settlement		272		428
Amortization of net actuarial loss	2	14	3	22
Amortization of prior service credits	5	2	11	5
Net periodic cost	$ 13	$ 304	$ 25	$ 483