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Net Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Calculation of Basic and Diluted Net Earnings Per Common Share | The following table shows the calculation of basic and diluted net earnings per common share under the two-class method:
| Three Months Ended |  |  | Nine Months Ended |
| September 30, |  |  | September 30, |
| 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Basic Net Earnings Per Common Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings available to common stockholders | $ | 59.3 |  |  | $ | 37.6 |  |  | $ | 191.3 |  |  | $ | 96.6 |
Distributed and allocated undistributed net earnings to non-vested restricted stockholders |  | (0.4 | ) |  |  | (0.2 | ) |  |  | (1.1 | ) |  |  | (0.5 | )
Distributed and allocated undistributed net earnings to common stockholders |  | 58.9 |  |  |  | 37.4 |  |  |  | 190.2 |  |  |  | 96.1 |
Distributed net earnings - dividends paid to common stockholders |  | (27.4 | ) |  |  | (25.3 | ) |  |  | (82.9 | ) |  |  | (75.9 | )
Allocation of undistributed net earnings to common stockholders | $ | 31.5 |  |  | $ | 12.1 |  |  | $ | 107.3 |  |  | $ | 20.2 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding - basic |  | 210.4 |  |  |  | 194.9 |  |  |  | 210.2 |  |  |  | 194.5 |
Basic net earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed net earnings to common stockholders | $ | 0.13 |  |  | $ | 0.13 |  |  | $ | 0.39 |  |  | $ | 0.39 |
Allocated undistributed net earnings to common stockholders |  | 0.15 |  |  |  | 0.06 |  |  |  | 0.52 |  |  |  | 0.10 |
Basic net earnings per common share: | $ | 0.28 |  |  | $ | 0.19 |  |  | $ | 0.91 |  |  | $ | 0.49 |
Diluted Net Earnings Per Common Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed and allocated undistributed net earnings to common stockholders | $ | 58.9 |  |  | $ | 37.4 |  |  | $ | 190.2 |  |  | $ | 96.1 |
Add: Allocated undistributed net earnings to non-vested restricted stockholders |  | 0.2 |  |  |  | 0.1 |  |  |  | 0.6 |  |  |  | 0.1 |
Less: Undistributed net earnings reallocated to non-vested restricted stockholders |  | (0.2 | ) |  |  | (0.1 | ) |  |  | (0.6 | ) |  |  | (0.1 | )
Net earnings available to common stockholders - diluted | $ | 58.9 |  |  | $ | 37.4 |  |  | $ | 190.2 |  |  | $ | 96.1 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding - basic |  | 210.4 |  |  |  | 194.9 |  |  |  | 210.2 |  |  |  | 194.5 |
Effect of assumed issuance of Settlement agreement shares (1) |  | — |  |  |  | 18.0 |  |  |  | 2.2 |  |  |  | 18.0 |
Effect of contingently issuable shares |  | 1.9 |  |  |  | 1.6 |  |  |  | 1.8 |  |  |  | 1.5 |
Effect of non-vested restricted stock units |  | 1.2 |  |  |  | 0.8 |  |  |  | 1.1 |  |  |  | 0.9 |
Weighted average number of common shares outstanding - diluted |  | 213.5 |  |  |  | 215.3 |  |  |  | 215.3 |  |  |  | 214.9 |
Diluted net earnings per common share | $ | 0.28 |  |  | $ | 0.18 |  |  | $ | 0.88 |  |  | $ | 0.45 |
— | For 2014, the shares included above represent the weighted average number of shares from January 1, 2014 through February 3, 2014. The weighted average number of shares from February 4, 2014 through September 30, 2014 are included in the weighted average number of common shares outstanding-basic since they were issued on February 3, 2014 in connection with the Settlement agreement.
Revised Diluted Weighted Average Number of Common Shares Outstanding | The previously reported, and revised diluted weighted average number of common shares outstanding to include the achievement of PSU awards in each previous reporting period of 2014 and 2013 are as follows:
| 2014 |
| Three Months Ended |  |  | Three Months Ended |  |  | Six Months Ended |
| March 31, 2014 |  |  | June 30, 2014 |  |  | June 30, 2014 |
Previously reported diluted weighted average number of common shares outstanding |  | 214.5 |  |  |  | 214.7 |  |  |  | 214.6 |
Revised diluted weighted average number of common shares outstanding |  | 216.0 |  |  |  | 216.4 |  |  |  | 216.2 |
| 2013 |
| Three Months Ended |  |  | Three Months Ended |  |  | Six Months Ended |  |  | Three Months Ended |  |  | Nine Months Ended |  |  | Three Months Ended |  |  | Year Ended |
| March 31, 2013 |  |  | June 30, 2013 |  |  | June 30, 2013 |  |  | September 30, 2013 |  |  | June 30, 2013 |  |  | December 31, 2013 |  |  | December 31, 2013 |
Previously reported diluted weighted average number of common shares outstanding |  | 212.7 |  |  |  | 213.6 |  |  |  | 213.2 |  |  |  | 213.7 |  |  |  | 213.4 |  |  |  | 213.9 |  |  |  | 213.5 |
Revised diluted weighted average number of common shares outstanding |  | 214.3 |  |  |  | 215.0 |  |  |  | 214.7 |  |  |  | 215.3 |  |  |  | 214.9 |  |  |  | 215.4 |  |  |  | 215.1 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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