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SHARE-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
RECONCILIATIONS OF BEGINNING AND ENDING BALANCE OF NONVESTED RESTRICTED STOCK (INCLUDING RSUS) TO BE SETTLED IN SHARES AND CASH | The following table provides a summary of nonvested cash-settled restricted stock units for the nine months ended September 30, 2018:
|  | Cash-Settled Performance Vesting Restricted Stock Units |  | Cash-Settled Service Based Restricted Stock Units |
|  | Number of Restricted Stock Units |  | Number of Restricted Stock Units |
| Nonvested restricted stock units - beginning of period | 42 |  |  | 988 |  |
| Granted | — |  |  | 468 |  |
| Vested | (12 | ) |  | (379 | ) |
| Forfeited | — |  |  | (70 | ) |
| Nonvested restricted stock units - end of period | 30 |  |  | 1,007 |  |
The following table provides a summary of nonvested share-settled restricted stock units for the nine months ended September 30, 2018:
|  | Share-Settled Performance Vesting Restricted Stock Units |  | Share-Settled Service Based Restricted Stock Units |
|  | Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value(1) |  | Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value(1) |
| Nonvested restricted stock units - beginning of period | 230 |  |  | $ | 57.08 |  |  | 1,355 |  |  | $ | 57.09 |  |
| Granted | 104 |  |  | 48.89 |  |  | 732 |  |  | 49.30 |  |
| Vested | (87 | ) |  | 54.71 |  |  | (486 | ) |  | 54.39 |  |
| Forfeited | — |  |  | — |  |  | (70 | ) |  | 56.07 |  |
| Nonvested restricted stock units - end of period | 247 |  |  | $ | 54.49 |  |  | 1,531 |  |  | $ | 54.19 |  |
(1) Fair value is based on the closing price of common shares on the grant date.

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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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