Other Employee Benefits Long-Term Disability (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 16,687,000	$ 93,799,000	$ 52,446,000
Long term disability [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	2,213,000	(687,000)	6,122,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.53%	3.04%	3.62%
Defined Benefit Plan, Benefit Obligation	22,427,000	20,425,000
Defined Benefit Plan, Curtailments		10,140,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax		1,338,000
Deferred Income Taxes and Tax Credits		803,000
Discontinued Operations [Member] | Long term disability [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost		$ 2,073,000	$ 1,816,000