Pensions and Other Employee Benefits Plans (Components of Net Periodic Cost) (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	$ 128	$ 59	$ 384	$ 141
Interest cost	474	474	1,422	1,411
Expected return on plan assets	(526)	(464)	(1,580)	(1,411)
Amortization of net actuarial loss	199	121	597	307
Net periodic cost	275	190	823	448
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1	1	2
Interest cost	6	17	33	52
Recognition due to settlement			428
Amortization of net actuarial loss	3	7	25	22
Amortization of prior service credits	3	2	8	7
Net periodic cost	$ 12	$ 27	$ 495	$ 83