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Stock-Based Compensation Plans | 3 Months Ended
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Mar. 31, 2014
Stock-Based Compensation Plans [Abstract] |
Stock-Based Compensation Plans | 13. STOCK-BASED COMPENSATION PLANS Stock-based compensation expense consists of the following:
(In millions) |  | For the Three Months Ended March 31,
|  | 2014 |  | 2013
Restricted stock |  | $ | 0.9 |  | $ | 0.6
Restricted stock units |  |  | 3.5 |  |  | 0.9
Total |  | $ | 4.4 |  | $ | 1.5
A summary of the restricted stock unit activity is presented below:
(Dollars in millions) |  | Number of Restricted Stock Units |  | Weighted Average Grant-Date Fair Value Per Share
Outstanding as of January 1, 2014 |  |  | 1,099,157 |  | $ | 48.23
Granted |  |  | 71,900 |  |  | 130.16
Converted |  |  | (300,875) |  |  | 26.53
Outstanding as of March 31, 2014 |  |  | 870,182 |  | $ | 62.50

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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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