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Stock Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Non-Vested Restricted Stock And Restricted Stock | A summary of the Company's non-vested restricted stock and restricted stock unit shares as of December 31, 2018, and changes during the year ended December 31, 2018, is presented below (shares in thousands):
| Shares |  | Weighted Average Grant Date Fair Value
Non-vested balance as of December 31, 2017 | 8,338 |  |  | $ | 34.65 |
Granted | 2,710 |  |  | 65.31 |
Vested | (3,299 | ) |  | 34.26 |
Forfeited | (384 | ) |  | 32.45 |
Non-vested balance as of December 31, 2018 | 7,365 |  |  | $ | 47.42 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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