Other Employee Benefits Long-Term Disability (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ (198,713,000)	$ 16,687,000	$ 93,799,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	86,447,000	(94,989,000)	(456,493,000)
Long term disability [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 2,619	$ 2,213	$ (687)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.18%	3.53%	3.04%
Defined Benefit Plan, Benefit Obligation	$ 19,789,000	$ 22,427,000
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
Long term disability [Member] | Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost			$ 2,073,000