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Consolidated Statements Of Changes In Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Consolidated Statements Of Changes In Equity [Abstract] |  |  |
Dividends per common share | $ 1.36 | $ 1.36 | $ 1.36
Financial instruments marked to market, tax amount | $ 4,996 | $ 1,188 | $ 8,028
Cumulative translation adjustment, tax amount | (161) | (1,910) | 1,385
Pension liability adjustment, tax amount | (27,492) | (582) | 967
Convertible debt discount, tax amount |  | 29,532 |
Call options, tax amount |  | (32,293) |
Divesture business, tax amount | $ 4,864 |  |

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