Pensions and Other Employee Benefits Plans (Reconciliation of Changes in Plans' Benefit Obligations and Fair Value of Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Ending balance	$ 24,628	$ 20,207
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	311	824	802
Interest cost	1,843	2,523	2,480
Employer contributions	4,000
Funded status at end of period	(15,614)	(42,281)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	6	5
Interest cost	65	45	48
Employer contributions	100
Funded status at end of period	(1,517)	(1,051)
Reconciliation of Benefit Obligation [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Obligation at beginning of period	62,488	549,013
Service cost	311	12,113
Interest cost	1,843	21,675
Participant contributions	28	1,252
Plan amendment		(1,497)
Actuarial loss (gain)	(3,874)	7,690
Benefit payments	(1,868)	(21,200)
Transfer due to sale		(506,558)
Curtailment and settlement	(18,686)
Obligation at December 31	40,242	62,488
Reconciliation of Benefit Obligation [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Obligation at beginning of period	1,051	66,049
Service cost	2	447
Interest cost	65	2,597
Participant contributions	51	1,646
Plan amendment	230
Actuarial loss (gain)	249	(967)
Benefit payments	(147)	(2,662)
Transfer due to sale		(66,059)
Curtailment and settlement	16
Obligation at December 31	1,517	1,051
Reconciliation of Fair Value of Plan Assets [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Participant contributions	28	1,252
Benefit payments	(1,467)	(19,985)
Transfer due to sale	(1,215)	(323,919)
Beginning balance	20,207	299,292
Actual return on plan assets	3,120	28,821
Employer contributions	3,955	34,746
Ending balance	24,628	20,207
Funded status at end of period	(15,614)	(42,281)
Reconciliation of Fair Value of Plan Assets [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Participant contributions	51	1,646
Benefit payments	(147)	(2,662)
Beginning balance		27
Actual return on plan assets		1
Employer contributions	96	988
Funded status at end of period	$ (1,517)	$ (1,051)