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Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2012 USD ($) | Mar. 31, 2012 ARS | Dec. 31, 2011 USD ($)
Components of accumulated other comprehensive loss, net of related taxes |  |  |
Cumulative foreign currency translation adjustment | $ (93,209,000) |  | $ (93,669,000)
Unrealized gain (loss) on investments | 1,173,000 |  | (311,000)
Unrealized loss on cash flow hedges | (91,000) |  |
Unrecognized pension cost | (61,008,000) |  | (62,085,000)
Accumulated other comprehensive loss | (153,135,000) |  | (156,065,000)
Components of changes in accumulated other comprehensive loss, net of related taxes |  |  |
Cumulative foreign currency translation adjustment | 460,000 |  |
Unrealized gain on investments | 1,484,000 |  |
Unrealized loss on cash flow hedges | (91,000) |  |
Unrecognized pension cost | 1,077,000 |  |
Accumulated other comprehensive loss | 2,930,000 |  |
Net assets of Sugar segment denominated in U.S. dollars | 4,809,000 |  |
Net assets of Sugar segment denominated in Argentine pesos |  | 215,045,000 |
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 | 20,293,000 |  |
Stock repurchase programs, authorized amount | 100,000,000 |  |
Remaining authorized repurchase amount under November 2009 share repurchase program | 53,699,000 |  |
Common shares repurchased | 3,250 |  |
Repurchase of common stock | $ 6,335,000 |  |

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