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Shareholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2010
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  | $ 1,251,582 |  | $ 1,146,206 |  | $ 1,146,206 |
Net Income | 104,909 |  | 62,904 | 219,774 |  | 158,415 |  | 217,586 |
Dividends |  |  |  | (137,673) |  |  |  | (164,514) |
Issuance of shares under incentive stock plans |  |  |  | 8,248 |  |  |  | 26,314 |
Stock-based compensation |  |  |  | 11,793 |  |  |  | 15,223 |
Excess tax benefit on stock-based compensation |  |  |  | 4,951 |  |  |  | 5,411 |
Repurchase of common shares |  |  |  | (7,909) |  |  |  | (6,028) |
Amortization of pension and postretirement plans | 2,261 |  | 1,210 | 6,449 |  | 5,849 |  | 6,385 |
Foreign currency translation adjustment | 3,584 |  | 3,198 | 11,314 |  | (64) |  | 4,162 |
Joint venture cash flow hedges | (630) |  | (104) | (498) |  | 922 |  | 837 |
Stockholders' Equity Attributable to Parent | 1,368,031 |  |  | 1,368,031 |  |  |  | 1,251,582 |
Common Stock, Dividends, Per Share, Declared | $ 0.40 |  | $ 0.33 | $ 1.12 |  | $ 1.00 |  | $ 1.36 |
Stock Split, Conversion Ratio | 1.5 |  |  |  |  |  |  |  |
Common Stock Including Additional Paid in Capital [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  | 602,882 |  | 561,962 |  | 561,962 |
Shares, Issued |  |  |  | 121,023,140 | [1] | 119,312,961 | [1] | 119,312,961 | [1]
Issuance of shares under incentive stock plans |  |  |  | 8,248 |  |  |  | 26,314 |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  |  |  | 1,013,180 | [1] |  |  | 1,914,341 | [1]
Stock-based compensation |  |  |  | 11,793 |  |  |  | 15,223 |
Excess tax benefit on stock-based compensation |  |  |  | 4,951 |  |  |  | 5,411 |
Repurchase of common shares |  |  |  | (7,909) |  |  |  | (6,028) |
Stock Repurchased During Period, Shares |  |  |  | (208,694) | [1] |  |  | (204,162) | [1]
Stockholders' Equity Attributable to Parent | 619,965 |  |  | 619,965 |  |  |  | 602,882 |
Shares, Issued | 121,827,626 | [1] |  | 121,827,626 | [1] |  |  | 121,023,140 | [1]
Retained Earnings [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  | 717,058 |  | 663,986 |  | 663,986 |
Net Income |  |  |  | 219,774 |  |  |  | 217,586 |
Dividends |  |  |  | (137,673) |  |  |  | (164,514) |
Stockholders' Equity Attributable to Parent | 799,159 |  |  | 799,159 |  |  |  | 717,058 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  | (68,358) |  | (79,742) |  | (79,742) |
Amortization of pension and postretirement plans |  |  |  | 6,449 |  |  |  | 6,385 |
Foreign currency translation adjustment |  |  |  | 11,314 |  |  |  | 4,162 |
Joint venture cash flow hedges |  |  |  | (498) |  |  |  | 837 |
Stockholders' Equity Attributable to Parent | $ (51,093) |  |  | $ (51,093) |  |  |  | $ (68,358) |
[1] | The impact of the August 2011 three-for-two stock split is reflected for all periods presented. See Note 2 - Earnings Per Common Share for additional information.

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