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SHARE-BASED COMPENSATION | 3 Months Ended
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Mar. 31, 2015
SHARE-BASED COMPENSATION. |
SHARE-BASED COMPENSATION | 11. SHARE-BASED COMPENSATION Share-based Compensation Expense We have granted various types of share-based payment awards to participants, including restricted stock unit awards and stock option grants. The key terms of our restricted stock unit awards and our stock option grants, including all financial disclosures, are set forth in our 2014 Annual Report for the year ended December 31, 2014. Information regarding our share-based compensation expense for the three month periods ended March 31, 2015 and 2014 are as follows:
|  | Three Months Ended March 31, |
(In millions) |  | 2015 |  | 2014 |
Share-based compensation expense |  | $ | 3.9 |  | $ | 2.8 |
Income tax provision related to share-based compensation expense |  |  | (1.3 | ) |  | (1.0 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
After tax share-based compensation expense |  | $ | 2.6 |  | $ | 1.8 |
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Diluted Earnings Per Share Due to the net loss in the three months ended March 31, 2015 and 2014, all common stock equivalents were excluded from the computation of diluted earnings per share due to their anti-dilutive effect. Certain of our restricted stock units participate in dividend distributions, however, the distributions for these restricted stock units do not have a material impact on our earnings per share calculation.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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