Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011
Components of accumulated other comprehensive loss, net of related taxes
Cumulative foreign currency translation adjustment	$ (96,810,000)		$ (96,810,000)		$ (93,669,000)
Unrealized gain (loss) on investments	860,000		860,000		(311,000)
Unrealized loss on cash flow hedges	(91,000)		(91,000)
Unrecognized pension cost	(58,765,000)		(58,765,000)		(62,085,000)
Accumulated other comprehensive loss	(154,806,000)		(154,806,000)		(156,065,000)
Components of changes in accumulated other comprehensive loss, net of related taxes
Cumulative foreign currency translation adjustment	(3,601,000)	(998,000)	(3,141,000)	(1,591,000)
Unrealized gain (loss) on investments	(313,000)	704,000	1,171,000	803,000
Unrealized loss on cash flow hedges			(91,000)
Unrecognized pension cost	2,243,000	730,000	3,320,000	1,071,000
Other comprehensive income (loss), net of tax	(1,671,000)	436,000	1,259,000	283,000
Net assets of Sugar segment denominated in Argentine pesos	213,777,000		213,777,000
Net assets of Sugar segment denominated in U.S. dollars	1,208,000		1,208,000
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	19,898,000		19,898,000
Stock repurchase programs, authorized amount			100,000,000
Remaining authorized repurchase amount under November 2009 share repurchase program			44,086,000
Common shares repurchased (in shares)			8,125
Repurchase of common stock			$ 15,949,000