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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Summary of Restricted Stock | The following table summarizes information about restricted stock awards for the year ended December 31, 2019:
Restricted Stock | Number of Shares |  | Weighted Average Grant-Date Fair Value
Unvested at January 1, 2019 | 657,240 |  |  | $ | 54.65 |
Granted | 174,114 |  |  | 68.82 |
Vested | (249,319 | ) |  | 53.99 |
Forfeited | (59,438 | ) |  | 55.65 |
Unvested at December 31, 2019 | 522,597 |  |  | $ | 59.57 |
Schedule of Performance Stock Awards | The following table summarizes information about performance stock awards for the year ended December 31, 2019:
Performance Stock | Number of Shares |  | Weighted Average Grant-Date Fair Value
Unvested at January 1, 2019 | 213,490 |  |  | $ | 55.71 |
Granted | 125,034 |  |  | 70.77 |
Vested | (105,583 | ) |  | 55.68 |
Forfeited | (28,388 | ) |  | 56.82 |
Unvested at December 31, 2019 | 204,553 |  |  | $ | 64.78 |

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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