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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2012
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information
SUPPLEMENTAL CASH FLOW INFORMATION
Operating assets and liabilities
The following table summarizes the changes in the components of operating assets and liabilities (in thousands):
 
Year Ended December 31, 2012
 
Year Ended December 31, 2011
 
Year Ended December 31, 2010
Decrease (increase) in restricted cash
$
4,907

 
$
25,827

 
$
182,898

Decrease (increase) in accounts receivable
(129,102
)
 
28,568

 
(26,602
)
Decrease (increase) in receivable from affiliates
230

 
(6,071
)
 
(337
)
Decrease (increase) in inventories
(936
)
 
(8,908
)
 
36,895

Decrease (increase) in derivatives and margin deposits
(1,245
)
 
14,287

 
12,146

Decrease (increase) in other current assets
4,197

 
(7,214
)
 
67,216

Decrease (increase) in other assets
2,467

 
(1,874
)
 
215

Increase (decrease) in accounts payable and accrued liabilities
114,776

 
(9,446
)
 
(11,349
)
Increase (decrease) in payable to affiliates
(6,871
)
 
6,614

 
257

Increase (decrease) in payables to pre-petition creditors
(5,206
)
 
(34,490
)
 
(217,471
)
Increase (decrease) in other noncurrent liabilities
2,500

 
4,115

 
18,269

 
$
(14,283
)
 
$
11,408

 
$
62,137


Acquisitions and disposals
On November 1, 2011, we contributed certain assets and liabilities to NGL Energy in return for cash and ownership interests in NGL Energy and its general partner. The assets and liabilities we contributed are summarized in Note 6.
At the end of September 2010, we deconsolidated White Cliffs. The assets and liabilities of White Cliffs at the time of deconsolidation are summarized in Note 6.
Other supplemental disclosures
We paid cash for interest totaling $8.0 million, $32.6 million and $44.5 million for the years ended December 31, 2012, 2011 and 2010, respectively.
We elected to defer $19.2 million of interest under a term loan during 2010, as allowed under the term loan agreement. The amount of interest that we deferred was added to the principal balance of the term loan. When we made principal payments on this term loan, we classified the payments as cash used for financing activities in the consolidated statements of cash flows, regardless of whether the principal arose from the initial term loan or from previous interest deferrals.
We paid cash for income taxes (net of refunds received) in the amount of $11.4 million, $10.1 million and $8.1 million during the years ended December 31, 2012, 2011 and 2010, respectively. We accrued $1.6 million, $4.0 million and $0.1 million at December 31, 2012, 2011 and 2010, respectively, for purchases of property, plant and equipment.