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SHARE-BASED COMPENSATION (Stock/Stock Unit Award Activity) (Details) - Stock and Stock Unit Awards
$ / shares in Units, shares in Thousands, $ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
$ / shares
shares
Share-based Compensation  
Total unrecognized compensation cost related to nonvested share-based compensation | $ $ 11.1
Total unrecognized compensation cost, recognized over a weighted-average period 1 year 6 months 21 days
Stock/Stock Unit Award Activity and Related Information, Shares  
Non-vested at beginning of period, shares | shares 463
Awarded, shares | shares 118
Vested, shares | shares (127)
Forfeited, shares | shares (17)
Non-vested at end of period, shares | shares 437
Stock/Stock Unit Award Activity and Related Information, Weighted Average Grant Date Fair Value  
Non-vested at beginning of period, weighted-average grant date fair value | $ / shares $ 42.36
Awarded, weighted-average grant date fair value | $ / shares 59.27
Vested, weighted-average grant date fair value | $ / shares 33.85
Forfeited, weighted-average grant date fair value | $ / shares 48.72
Non-vested at the end of period, weighted-average grant date fair value | $ / shares $ 49.16