Restructuring Activities (Tables)

12 Months Ended

Dec. 31, 2012

Restructuring and Related Activities [Abstract]

Summary of Restructuring Related Obligations

The following table summarizes our restructuring-related obligations as of and for the years ended December 31:



	2012			2011			2010
Balance at beginning of period	$	576		$	64		$	529
Employee, office and other costs accrued, net	1,284			2,351			8,200
Firm transportation charge	17,332			—			—
Accretion of obligations	570			—			—
Cash payments, net	(2,499		)	(1,839		)	(8,665		)
Balance at end of period	$	17,263		$	576		$	64

- Definition

Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period.

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