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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Stock-Based Compensation The following table summarizes the Company's pre-tax compensation expense and related income tax benefit during the three months ended March 31, 2015 and 2014 related to the Company's performance units and restricted stock.
| Three Months Ended March 31,
(In millions) | 2015 | 2014
Performance units |  |
Total shareholder return | $ | 1.9 |  | $ | 2.0 |
Earnings per share | 0.5 |  | 1.7 |
Total performance units | 2.4 |  | 3.7 |
Restricted stock | — |  | 0.1 |
Total compensation expense | 2.4 |  | 3.8 |
Less: Amount paid by unconsolidated affiliates | 0.3 |  | 1.2 |
Net compensation expense | $ | 2.1 |  | $ | 2.6 |
Income tax benefit | $ | 0.8 |  | $ | 1.0 |
The Company has issued new shares to satisfy restricted stock grants and payouts of earned performance units. During the three months ended March 31, 2015, there were 80,781 shares of new common stock issued pursuant to the Company's stock incentive plans related to restricted stock grants (net of forfeitures) and payouts of earned performance units. During the three months ended March 31, 2015, there were 979 shares of restricted stock returned to the Company to satisfy tax liabilities. The following table summarizes the activity of the Company's stock-based compensation during the three months ended March 31, 2015.
| Units/Shares | Fair Value
Grants |  |  |  |
Performance units (Total shareholder return) | 264,454 |  | $ | 31.02 |
Performance units (Earnings per share) | 88,156 |  | $ | 33.99 |
Conversions |  |
Performance units (Total shareholder return) (A) | 336,147 |  | N/A |
Performance units (Earnings per share) (A) | 111,950 |  | N/A |
(A) | Performance units were converted based on a payout ratio of 29 percent of the target number of performance units granted in February 2012 and are included in the 80,781 shares of common stock issued during the three months ended March 31, 2015 as discussed above.

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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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