Pension And Other Post Retirement Benefits Net Periodic Benefit Cost For Other Post Retirement Plans Applicalbe To Continuing And Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 29, 2014	Jun. 30, 2015	Jun. 29, 2014
Other Post Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 300	$ 2,000	$ 400	$ 3,000
Defined Benefit Plan, Net Periodic Benefit Cost	172	600	308	1,316
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Contributions by Employer		2,000		4,000
Defined Benefit Plan, Net Periodic Benefit Cost	(7,280)	(7,518)	(14,583)	(15,322)
Continuing operations | Other Post Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	172	185	308	337
Discontinued operations | Other Post Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 0	$ 415	$ 0	$ 979