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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
RECONCILIATION OF BEGINNING AND ENDING BALANCE OF NONVESTED RESTRICTED STOCK (INCLUDING RSUS) TO BE SETTLED IN SHARES AND CASH | The following table provides an activity summary of the Company's share-settled restricted stock units:
|  | Share-Settled Performance Restricted Stock Units |  | Share-Settled Service 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 - 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 units - December 31, 2018 | 232 |  |  | 54.54 |  |  | 1,411 |  |  | 54.12 |  |
| Granted | 127 |  |  | 54.70 |  |  | 523 |  |  | 54.88 |  |
| Vested | (61 | ) |  | 53.82 |  |  | (487 | ) |  | 54.29 |  |
| Forfeited | (40 | ) |  | 64.01 |  |  | (174 | ) |  | 54.49 |  |
| Nonvested restricted stock units - December 31, 2019 | 258 |  |  | $ | 53.31 |  |  | 1,273 |  |  | $ | 54.32 |  |
(1) Fair value is based on the closing price of the Company's common shares on the grant date. The following table provides an activity summary of the Company's cash-settled restricted stock units:
|  | Cash-Settled Performance Restricted Stock Units |  | Cash-Settled Service Restricted Stock Units |
|  | Number of restricted stock units |  | Number of restricted stock units |
| 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 |  |
| Granted | — |  |  | 364 |  |
| Vested | (12 | ) |  | (333 | ) |
| Forfeited | (9 | ) |  | (110 | ) |
| Nonvested restricted stock units - December 31, 2019 | 6 |  |  | 853 |  |
ADDITIONAL INFORMATION RELATED TO SHARE BASED COMPENSATION | The following table provides additional information related to share-based compensation:
| Year ended December 31, | 2019 |  | 2018 |  | 2017 |
| Share-based compensation expense (1) | $ | 52,218 |  |  | $ | 54,011 |  |  | $ | 67,697 |  |
| Tax benefits associated with share-based compensation expense | $ | 8,913 |  |  | $ | 7,772 |  |  | $ | 14,937 |  |
| Liability for cash-settled restricted stock units (2) | $ | 21,731 |  |  | $ | 20,648 |  |  | $ | 21,535 |  |
| Fair value of restricted stock units vested (3)(4) | $ | 51,206 |  |  | $ | 50,750 |  |  | $ | 124,990 |  |
| Unrecognized share-based compensation expense | $ | 75,770 |  |  | $ | 87,341 |  |  | $ | 94,315 |  |
| Expected weighted average period to recognize unrecognized share-based compensation expense | 2.3 years |  |  | 2.4 years |  |  | 2.5 years |  |
(1) Related to restricted shares, share-settled stock units, and cash settled restricted stock units. (2) Included in other liabilities in the consolidated balance sheets. (3) Fair value is based on the closing price of the Company's common shares on the vest date. (4) The fair value of share-settled restricted stock units and cash-settled restricted stock units that vested in 2017 included $44 million attributable to service 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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