Supplemental Stockholders' Equity Information Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 27, 2015	$ (509,094)
Income tax expense(1)	3,103	$ 16,320
Other comprehensive income, net of tax	5,091	24,491
Balance as of March 27, 2016	(504,003)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 27, 2015	17
Other comprehensive income before reclassifications, before tax(1)	1,642
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	0
Income tax expense(1)	495
Other comprehensive income, net of tax	1,147
Balance as of March 27, 2016	1,164
Funded Status of Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 27, 2015	(509,111)
Other comprehensive income before reclassifications, before tax(1)	0
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	6,552
Income tax expense(1)	2,608
Other comprehensive income, net of tax	3,944
Balance as of March 27, 2016	(505,167)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 27, 2015	(509,094)
Other comprehensive income before reclassifications, before tax(1)	1,642
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	6,552
Income tax expense(1)	3,103
Other comprehensive income, net of tax	5,091	$ 24,491
Balance as of March 27, 2016	$ (504,003)