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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
RECONCILIATION OF BEGINNING AND ENDING BALANCE OF NONVESTED RESTRICTED STOCK (INCLUDING RSUS) TO BE SETTLED IN SHARES AND CASH |
a) | Share-Settled Awards
The following table provides an activity summary of the Company's share-settled RSUs:
|  | Share-Settled PSUs |  | Share-Settled Service Based RSUs |
|  | 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 - December 31, 2016 | 283 |  |  | $ | 51.27 |  |  | 1,593 |  |  | $ | 48.88 |  |
| Granted | 87 |  |  | 64.58 |  |  | 733 |  |  | 61.94 |  |
| Vested(2) | (119 | ) |  | 49.14 |  |  | (889 | ) |  | 47.48 |  |
| Forfeited | (21 | ) |  | 55.00 |  |  | (82 | ) |  | 54.89 |  |
| Nonvested restricted stock - December 31, 2017 | 230 |  |  | 57.08 |  |  | 1,355 |  |  | 57.09 |  |
| Granted | 104 |  |  | 48.89 |  |  | 737 |  |  | 49.36 |  |
| Vested | (87 | ) |  | 54.71 |  |  | (539 | ) |  | 54.51 |  |
| Forfeited | (15 | ) |  | 53.80 |  |  | (142 | ) |  | 55.36 |  |
| Nonvested restricted stock - December 31, 2018 | 232 |  |  | $ | 54.54 |  |  | 1,411 |  |  | $ | 54.12 |  |
(1) Fair value is based on the closing price of the Company's common shares on the grant date. (2) Share-settled restricted stock units that vested during the year ended December 31, 2017 included 313,391 service based restricted stock units which were granted in 2014 and were subject to a three year cliff vesting period. b) Cash-Settled Awards The following table provides an activity summary of the Company's cash-settled RSUs:
|  | Cash-Settled PSUs |  | Cash-Settled Service based RSUs |
|  | Number of restricted stock units |  | Number of restricted stock units |
| Nonvested restricted stock units - December 31, 2016 | 68 |  |  | 1,392 |  |
| Granted | 15 |  |  | 432 |  |
| Vested(1) | (38 | ) |  | (763 | ) |
| Forfeited | (3 | ) |  | (73 | ) |
| Nonvested restricted stock units - December 31, 2017 | 42 |  |  | 988 |  |
| Granted | — |  |  | 473 |  |
| Vested | (12 | ) |  | (390 | ) |
| Forfeited | (3 | ) |  | (139 | ) |
| Nonvested restricted stock units - December 31, 2018 | 27 |  |  | 932 |  |
(1) Cash-settled restricted stock units that vested during the year ended December 31, 2017 included 307,556 service based restricted stock units which were granted in 2014 and were subject to a three year cliff vesting period.

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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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