Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

14. Supplemental Cash Flow Information

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

	Year Ended December 31,
	2011			2010			2009
(Increase) decrease in:
Accounts receivable	$	(66,208	)	$	(41,648	)	$	(7,979	)
Inventories		(46,151	)		(16,870	)		(16,559	)
Other current assets		(3,598	)		(4,036	)		(2,712	)
Increase (decrease) in:
Accounts payable		33,049			47,401			19,203
Accrued liabilities		15,977			9,666			(1,522	)
Net changes in components of operating assets and liabilities	$	(66,931	)	$	(5,487	)	$	(9,569	)

Payments of interest and commitment fees, net of amounts capitalized, were $32.9 million, $25.1 million and $13.3 million, during the years ended December 31, 2011, 2010 and 2009, respectively.

Cash paid for income taxes during the years ended December 31, 2011, 2010 and 2009 was $1 million, $2.4 million and $0.2 million, respectively.

At December 31, 2011, 2010 and 2009, we had incurred liabilities for fixed and intangible asset additions totaling $2.0 million, $2.6 million and $0.5 million, respectively, which had not been paid at the end of the year. Therefore, these amounts were not included in the caption "Payments to acquire fixed and intangible assets" on the Consolidated Statements of Cash Flows.