Retirement And Other Employee Benefits (Amounts Recognized In Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss)	$ (210,859)	$ (147,288)	$ (282,491)
Prior service cost	(3,272)	(4,119)	(4,975)
Total recognized in accumulated other comprehensive (loss) income	(214,131)	(151,407)	(287,466)
Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss)	(394)	11,710	261
Prior service cost	5,169	6,102	7,035
Total recognized in accumulated other comprehensive (loss) income	$ 4,775	$ 17,812	$ 7,296