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Basic and diluted earnings (loss) per share (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Numerator: | |||||||||||
| Loss from continuing operations attributable to Atlantic Power Corporation | $ (20,052,000) | $ (24,589,000) | $ (21,375,000) | $ (50,763,000) | $ (25,903,000) | $ (38,420,000) | $ (613,000) | $ (6,882,000) | $ (129,235,000) | $ (74,585,000) | $ (27,879,000) |
| Income from discontinued operations, net of tax | 16,459,000 | 36,177,000 | 24,127,000 | ||||||||
| Net loss attributable to Atlantic Power Corporation | $ (57,952,000) | $ (7,446,000) | $ (5,086,000) | $ (42,292,000) | $ (29,830,000) | $ (27,900,000) | $ 13,186,000 | $ 6,136,000 | $ (112,776,000) | $ (38,408,000) | $ (3,752,000) |
| Denominator: | |||||||||||
| Weighted average basic shares outstanding | 119,372 | 119,011 | 113,682 | 113,578 | 113,088 | 68,910 | 68,573 | 67,654 | 116,426 | 77,466 | 61,706 |
| Dilutive potential shares: | |||||||||||
| Convertible debentures (in shares) | 17,353 | 13,962 | 12,339 | ||||||||
| LTIP notional units (in shares) | 489 | 438 | 542 | ||||||||
| Potentially dilutive shares | 134,268 | 91,866 | 74,587 | ||||||||
| Diluted loss per share from continuing operations attributable to Atlantic Power Corporation (in dollars per share) | $ (0.20) | $ (0.23) | $ (0.21) | $ (0.47) | $ (0.25) | $ (0.56) | $ (0.01) | $ (0.10) | $ (1.11) | $ (0.96) | $ (0.45) |
| Diluted earnings per share from discontinued operations (in dollars per share) | $ (0.29) | $ 0.17 | $ 0.17 | $ 0.10 | $ (0.01) | $ 0.16 | $ 0.19 | $ 0.19 | $ 0.14 | $ 0.46 | $ 0.39 |
| Net loss attributable to Atlantic Power Corporation (in dollars per share) | $ (0.49) | $ (0.06) | $ (0.04) | $ (0.37) | $ (0.26) | $ (0.40) | $ 0.18 | $ 0.09 | $ (0.97) | $ (0.50) | $ (0.06) |
| X | ||||||||||
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit, determined based on the timing of issuance of shares or units in the period. No definition available.
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net income or loss derived from discontinued operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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