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SHARE-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2017
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 | Share-settled Awards The following table provides a reconciliation of the beginning and ending balance of nonvested share-settled restricted stock units for the nine months ended September 30, 2017:
|  | Performance-based Stock Awards |  | Service-based Stock Awards |
|  | 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 - beginning of period | 283 |  |  | $ | 51.27 |  |  | 1,593 |  |  | $ | 48.88 |  |
| Granted | 87 |  |  | 64.58 |  |  | 525 |  |  | 64.22 |  |
| Vested(2) | (119 | ) |  | 49.14 |  |  | (881 | ) |  | 47.37 |  |
| Forfeited | — |  |  | — |  |  | (69 | ) |  | 54.66 |  |
| Nonvested restricted stock - end of period | 251 |  |  | $ | 56.88 |  |  | 1,168 |  |  | $ | 57.08 |  |
(1) Fair value is based on the closing price of our common shares on the grant approval date. (2) Share-settled restricted stock units vested during the nine months ended September 30, 2017 included 313,391 restricted stock units attributable to a grant of 3 year cliff vesting service-based awards made in 2014. Cash-settled awards The following table provides a reconciliation of the beginning and ending balance of nonvested cash-settled restricted stock units for the nine months ended September 30, 2017:
|  | Performance-based Cash Settled Awards |  | Service-based Cash Settled Awards |
|  | Number of Restricted Stock Units |  | Number of Restricted Stock Units |
| Nonvested restricted stock units - beginning of period | 68 |  |  | 1,392 |  |
| Granted | 15 |  |  | 427 |  |
| Vested(1) | (38 | ) |  | (755 | ) |
| Forfeited | — |  |  | (60 | ) |
| Nonvested restricted stock units - end of period | 45 |  |  | 1,004 |  |
(1) Cash settled restricted stock units vested during the nine months ended September 30, 2017 included 307,556 restricted stock units attributable to a grant of 3 year cliff vesting service-based awards made in 2014.

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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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