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UNIT-BASED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of nonvested share activity
The following table presents the phantom unit activity under the LTIP for the six months ended June 30, 2020:
Phantom
Units		Weighted Average
Grant-Date
Fair Value
Unvested at December 31, 20192,226,895  $19.14  
Granted20,910  $13.85  
Vested(449,633) $19.14  
Forfeited(23,442) $18.23  
Unvested at June 30, 20201,774,730  $19.09