EARNINGS PER COMMON UNIT - Antidilutive (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock Options
Earnings per common unit
Antidilutive securities excluded from calculation of earnings per common unit (in units)	23,363,784	25,013,577	23,429,835	25,018,280
Restricted Unit
Earnings per common unit
Antidilutive securities excluded from calculation of earnings per common unit (in units)	64,516	166	94,363	381
Units Exchangeable into Entity Units, AOG
Earnings per common unit
Antidilutive securities excluded from calculation of earnings per common unit (in units)	132,350,586	132,436,444	132,366,701	132,427,727