v3.8.0.1
PARTNERS' EQUITY Table 1 - Changes to Partners' Equity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Increase (Decrease) in Partners' Capital [Roll Forward]    
Balance as of January 1, 2018 $ 2,480,089  
Net income (loss) 126,133 $ 57,940
Unit-based compensation 1,286  
Other comprehensive income 20,924  
Distributions to partners (131,262)  
Other (5,113)  
Balance as of March 31, 2018 $ 2,492,057