Pensions and Other Employee Benefits Plans (Pre-Tax Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	$ (17,200)	$ (9,636)
Pre-tax amounts recognized in accumulated other comprehensive income (loss)	(17,200)	(9,636)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	(550)	(444)
Amendments-prior service (cost) credit	(80)	(89)
Pre-tax amounts recognized in accumulated other comprehensive income (loss)	$ (630)	$ (533)