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LONG-TERM INCENTIVE PLAN - Phantom and Restricted Unit Awards (Detail) - Phantom Unit And Restricted Unit Awards
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Total non-vested at December 31, 2018 (in shares) | shares 1,029,638
Units issued (in shares) | shares 1,381,572
Units vested (in shares) | shares (1,819,131)
Units forfeited (in shares) | shares (32,861)
Total non-vested at December 31, 2019 9in shares) | shares 559,218
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Total non-vested at December 31, 2018 | $ / shares $ 7.49
Units issued | $ / shares 2.86
Units vested | $ / shares 5.16
Units forfeited | $ / shares 6.68
Total non-vested at December 31, 2019 | $ / shares $ 3.67