Pensions and Other Employee Benefits Plans (Amounts Recognized in Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Post Retirement Benefits, Before-Tax Amount	$ 949	$ (836)	$ 7,661
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss) during the period	(1,875)	(425)	(7,972)
Amortization of actuarial loss (gain)	889	795	408
Post Retirement Benefits, Before-Tax Amount	(986)	370	(7,564)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss) during the period	10	1	(145)
Amortization of actuarial loss (gain)	5	26	39
Amortization of prior service cost (credit)	22	11	9
Recognition due to curtailment and amount reclassified		428
Post Retirement Benefits, Before-Tax Amount	$ 37	$ 466	$ (97)