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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 |  |

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