Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 29, 2012	Jun. 30, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Dec. 31, 2011
Components of accumulated other comprehensive loss, net of related taxes
Cumulative foreign currency translation adjustment	$ (102,833,000)			$ (102,833,000)		$ (93,669,000)
Unrealized gain (loss) on investments	2,464,000			2,464,000		(311,000)
Unrealized loss on cash flow hedges	(91,000)			(91,000)
Unrecognized pension cost	(57,630,000)			(57,630,000)		(62,085,000)
Accumulated other comprehensive loss	(158,090,000)			(158,090,000)		(156,065,000)
Components of changes in accumulated other comprehensive loss, net of related taxes
Pension Settlement Loss		1,796,000		1,796,000
Cumulative foreign currency translation adjustment	(6,023,000)		(5,082,000)	(9,164,000)	(6,673,000)
Unrealized gain (loss) on investments	1,604,000		(1,652,000)	2,775,000	(849,000)
Unrealized loss on cash flow hedges				(91,000)
Unrecognized pension cost	1,135,000		906,000	4,455,000	1,977,000
Other comprehensive loss, net of tax	(3,284,000)		(5,828,000)	(2,025,000)	(5,545,000)
Net assets of Sugar segment denominated in Argentine pesos	211,510,000			211,510,000
Net assets of Sugar segment denominated in U.S. dollars	5,293,000			5,293,000
Income tax rate for foreign currency translation gains and losses (as a percent)				35.00%
Effective income tax rate for components of accumulated other comprehensive loss (as a percent)				39.00%
Unrecognized pension cost related to employees at certain subsidiaries	19,496,000			19,496,000
Stock repurchase programs, authorized amount				100,000,000
Remaining authorized repurchase amount under November 2009 share repurchase program				41,842,000
Common shares repurchased (in shares)				9,175
Repurchase of common stock				$ 18,193,000