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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Non-vested Restricted Stock Units | Non-vested RSUs outstanding as of December 31, 2015 and the changes during the year were as follows:
|  |  |  | Weighted
|  | Number of |  | Average Grant
|  | Shares |  | Date Fair Value
Non-vested at December 31, 2014 |  | 2,577,237 |  |  | $ | 20.98 |
Granted |  | 932,202 |  |  | 15.71 |
Vested |  | (1,069,630 | ) |  | 20.94 |
Forfeited |  | (80,436 | ) |  | 19.91 |
Non-vested at December 31, 2015 |  | 2,359,373 |  |  | $ | 18.95 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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