Pensions and Other Employee Benefits Plans (Changes in Fair Value of Pension Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	$ 29,296
Fair value of plan assets at December 31,	31,466	$ 29,296
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	2,789	2,788
Purchases and sales		639
Fair value of plan assets at December 31,	2,935	2,789
Private Equity Funds [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	174	249
Purchases and sales
Fair value of plan assets at December 31,	129	174
Equity Long/Short Fund [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	847	801
Purchases and sales
Fair value of plan assets at December 31,	835	847
Distressed Opportunity Ltd. Partnership [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	313	368
Purchases and sales
Fair value of plan assets at December 31,	448	313
Multi-Strategy Limited Partnerships [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of plan assets at beginning of period	1,455	1,370
Purchases and sales		639
Fair value of plan assets at December 31,	1,523	1,455
Unrealized Gain/(Loss) [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)	189	19
Unrealized Gain/(Loss) [Member] | Private Equity Funds [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)	(2)	2
Unrealized Gain/(Loss) [Member] | Equity Long/Short Fund [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)	(12)	46
Unrealized Gain/(Loss) [Member] | Distressed Opportunity Ltd. Partnership [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)	135	(55)
Unrealized Gain/(Loss) [Member] | Multi-Strategy Limited Partnerships [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)	68	26
Realized Gain/(Loss) [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)		59
Realized Gain/(Loss) [Member] | Private Equity Funds [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)
Realized Gain/(Loss) [Member] | Equity Long/Short Fund [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)
Realized Gain/(Loss) [Member] | Distressed Opportunity Ltd. Partnership [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)
Realized Gain/(Loss) [Member] | Multi-Strategy Limited Partnerships [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Realized and unrealized gain/(loss)		59
Sales [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and sales	(43)	(716)
Sales [Member] | Private Equity Funds [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and sales	(43)	(77)
Sales [Member] | Equity Long/Short Fund [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and sales
Sales [Member] | Distressed Opportunity Ltd. Partnership [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and sales
Sales [Member] | Multi-Strategy Limited Partnerships [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and sales		$ (639)