Supplemental Stockholders' Equity Information - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Changes in accumulated other comprehensive income (loss):
Balance, beginning of period	$ (402,611)
Other comprehensive (loss)/income before reclassifications, before tax(1)	1,505	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	5,090
Income tax expense	2,701		1,780
Other comprehensive income, net of tax	3,894		2,628
Balance, end of period	(398,717)
Foreign Currency Translation Adjustments [Member]
Changes in accumulated other comprehensive income (loss):
Balance, beginning of period	12,674
Other comprehensive (loss)/income before reclassifications, before tax(1)	(155)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	0
Income tax expense	14
Other comprehensive income, net of tax	(169)
Balance, end of period	12,505
Funded Status of Benefit Plans [Member]
Changes in accumulated other comprehensive income (loss):
Balance, beginning of period	(415,285)
Other comprehensive (loss)/income before reclassifications, before tax(1)	1,660	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	5,090
Income tax expense	2,687
Other comprehensive income, net of tax	4,063
Balance, end of period	$ (411,222)

[1] All amounts are shown net of noncontrolling interest.