Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Pension and other post-retirement actuarial items [Abstract]
Beginning Balance			$ (178,956)
Other comprehensive income before reclassifications			0
Tax Effect			0
Other comprehensive income before reclassifications, net of tax			0
Amounts reclassified out of AOCI			9,207
Tax Effect			(3,035)
Amounts reclassified out of AOCI, net of tax			6,172
Net comprehensive income	2,941	3,251	6,172	5,555
Ending Balance	(172,784)		(172,784)
Currency translation adjustment [Abstract]
Beginning Balance			167,461
Other comprehensive income before reclassifications			(14,671)
Tax Effect			0
Other comprehensive income before reclassifications, net of tax			(14,671)
Amounts reclassified out of AOCI			0
Tax Effect			0
Amounts reclassified out of AOCI, net of tax			0
Net comprehensive income	10,450	(50,445)	(14,671)	(27,217)
Ending Balance	152,790		152,790
Unrealized gain (loss) on available-for-sale securities [Abstract]
Beginning Balance			1,273
Other comprehensive income before reclassifications			335
Tax Effect			(117)
Other comprehensive income before reclassifications, net of tax			218
Amounts reclassified out of AOCI			(687)
Tax Effect			255
Amounts reclassified out of AOCI, net of tax			(432)
Net comprehensive income	(644)	(157)	(214)	657
Ending Balance	1,059		1,059
Other Comprehensive Income (Loss) - Total [Abstract]
Beginning Balance			(10,222)
Other comprehensive income before reclassifications			(14,336)
Tax Effect			(117)
Other comprehensive income before reclassifications, net of tax			(14,453)
Amounts reclassified out of AOCI			8,520
Tax Effect			(2,780)
Amounts reclassified out of AOCI, net of tax			5,740
Net comprehensive income	12,747	(47,351)	(8,713)	(21,005)
Ending Balance	(18,935)		(18,935)
Rabbi Trust Assets [Member]
Unrealized gain (loss) on available-for-sale securities [Abstract]
Amounts reclassified out of AOCI	676		731
Other AFS Securities [Member]
Unrealized gain (loss) on available-for-sale securities [Abstract]
Amounts reclassified out of AOCI	$ (39)		$ (44)