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Equity-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Restricted Stock and RSU to be Settled in Common Stock Activity | A summary of the activity for restricted stock and RSUs to be settled in common stock for the year ended December 31, 2013 is as follows (shares in thousands):
|  | Shares |  |  | Weighted Average Grant Date Fair Value (Per share) |
Unvested at January 1, 2013 |  |  | 2,194 |  |  | $ | 21.29 |
Granted |  |  | 1,473 |  |  | $ | 29.37 |
Vested |  |  | (1,160 | ) |  | $ | 21.79 |
Forfeited |  |  | (149 | ) |  | $ | 23.41 |
Unvested at December 31, 2013 |  |  | 2,358 |  |  | $ | 25.96 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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