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SHARE-BASED COMPENSATION PLANS (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation Expense and Income Tax Benefits Recognized During the Periods | The following table provides information on share-based compensation expense and income tax benefits recognized during the periods:
| Three months ended March 31,
| 2019 |  | 2018
| (In thousands)
Stock option and stock purchase plans | $ | 1,819 |  |  | 1,875 |
Unvested stock | 5,580 |  |  | 3,466 |
Share-based compensation expense | 7,399 |  |  | 5,341 |
Income tax benefit | (1,160 | ) |  | (1,161 | )
Share-based compensation expense, net of tax | $ | 6,239 |  |  | 4,180 |

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