Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

11. Supplemental Cash Flow Information

The following table provides information regarding the net changes in components of operating assets and liabilities.

	Nine Months Ended September 30,
	2012			2011
(Increase) decrease in:
Accounts receivable	$	(80,789	)	$	(52,355	)
Inventories	33,826			(34,757		)
Other current assets	1,846			1,515
Increase (decrease) in:
Accounts payable	57,851			16,953
Accrued liabilities	6,144			17,906
Net changes in components of operating assets and liabilities	$	18,878		$	(50,738	)

Payments of interest and commitment fees were $24.4 million and $20.3 million for the nine months ended September 30, 2012 and 2011, respectively.

At September 30, 2012 and 2011, we had incurred liabilities for fixed and intangible asset additions totaling $4.8 million and $1.3 million, respectively, that had not been paid at the end of the third quarter, and, therefore, were not included in the caption “Payments to acquire fixed and intangible assets” under Cash Flows from Investing Activities in the Unaudited Condensed Consolidated Statements of Cash Flows.

At September 30, 2012, we had incurred liabilities for other asset additions totaling $0.6 million that had not been paid at the end of the third quarter, and, therefore, were not included in the caption "Other, net" under Cash Flows from Investing Activities in the Unaudited Condensed Consolidated Statements of Cash Flows.