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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2017
Supplemental Cash Flow Information [Abstract]  
Schedule of Changes in Operating Assets and Liabilities
The following table summarizes the changes in the components of operating assets and liabilities shown on our condensed consolidated statements of cash flows (in thousands):
 
Three Months Ended March 31,
 
2017
 
2016
Decrease (increase) in restricted cash
$
28

 
$
32

Decrease (increase) in accounts receivable
(55,150
)
 
40,535

Decrease (increase) in receivable from affiliates
12,529

 
2,237

Decrease (increase) in inventories
(2,441
)
 
4,834

Decrease (increase) in derivatives and margin deposits
(194
)
 
(634
)
Decrease (increase) in other current assets
1,051

 
1,582

Decrease (increase) in other assets
(875
)
 
12

Increase (decrease) in accounts payable and accrued liabilities
40,485

 
(55,581
)
Increase (decrease) in payable to affiliates
(9,422
)
 
(1,626
)
Increase (decrease) in other noncurrent liabilities
1,041

 
(511
)
 
$
(12,948
)
 
$
(9,120
)