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Earnings (Loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2011
Earnings (Loss) Per Share |
Computation of earnings per share |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2011 |  | 2010 |  | 2011 |  | 2010 |
Basic and diluted earnings per share numerators (in millions): |  |  |  |  |  |  |  |  |
Net income (loss) attributable to White Mountains’ common shareholders |  | $ | (15.8 | ) | $ | 50.7 |  | $ | (32.3 | ) | $ | 13.6 |
Less: net (income) loss from discontinued operations |  | 30.1 |  | (3.6 | ) | 28.9 |  | (1.2 | )
Net income (loss) attributable to White Mountains’ common shareholders from continuing operations |  | 14.3 |  | 47.1 |  | (3.4 | ) | 12.4 |
Dividends declared and paid |  | — |  | — |  | (8.0 | ) | (8.8 | )
Undistributed earnings (loss) |  | $ | 14.3 |  | $ | 47.1 |  | $ | (11.4 | ) | $ | 3.6 |
Basic earnings per share denominators (in thousands): |  |  |  |  |  |  |  |  |
Average common shares outstanding during the period |  | 7,845 |  | 8,332 |  | 7,902 |  | 8,547 |
Average unvested restricted shares (1) |  | 74 |  | 99 |  | 68 |  | 97 |
Basic earnings (loss) per share denominator |  | 7,919 |  | 8,431 |  | 7,970 |  | 8,644 |
Diluted earnings per share denominator (in thousands): |  |  |  |  |  |  |  |  |
Average common shares outstanding during the period |  | 7,845 |  | 8,332 |  | 7,902 |  | 8,547 |
Average unvested restricted shares (1) |  | 74 |  | 99 |  | 68 |  | 97 |
Average outstanding dilutive options to acquire common shares (2) |  | — |  | — |  | — |  | 1 |
Diluted earnings (loss) per share denominator |  | 7,919 |  | 8,431 |  | 7,970 |  | 8,645 |
Basic earnings per share (in dollars): |  |  |  |  |  |  |  |  |
Net income (loss) attributable to White Mountains’ common shareholders |  | $ | 1.81 |  | $ | 5.58 |  | $ | (0.43 | ) | $ | 1.44 |
Dividends declared and paid |  | — |  | — |  | (1.00 | ) | (1.00 | )
Undistributed earnings (loss) per share |  | $ | 1.81 |  | $ | 5.58 |  | $ | (1.43 | ) | $ | 0.44 |
Diluted earnings per share (in dollars) |  |  |  |  |  |  |  |  |
Net income (loss) attributable to White Mountains’ common shareholders |  | $ | 1.81 |  | $ | 5.58 |  | $ | (0.43 | ) | $ | 1.44 |
Dividends declared and paid |  | — |  | — |  | (1.00 | ) | (1.00 | )
Undistributed earnings (loss) per share |  | $ | 1.81 |  | $ | 5.58 |  | $ | (1.43 | ) | $ | 0.44 |
(1) | Restricted shares outstanding vest either in equal annual installments or upon a stated date (see Note 12).
(2) | The diluted earnings (loss) per share denominator for the three and nine months ended September 30, 2011 and for the three months ended September 30, 2010 does not include common shares issuable upon exercise of the Non-Qualified Options as they are anti-dilutive to the calculation.

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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