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Fair-Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Placement Of Assets And Liabilities Within The Fair Value Hierarchy Levels



	December 31, 2012							December 31, 2011
Recurring Fair Value Measures	Level 1			Level 2		Level 3		Level 1			Level 2		Level 3
Commodity derivatives:
Assets	$	758		$	—	$	—	$	306		$	—	$	—
Liabilities	$	(3,357	)	$	—	$	—	$	(2,820	)	$	—	$	—

Reconciliation Of Changes In Fair Value Of The Beginning And Ending Balances For Our Derivatives Measured At Fair Value



	Year Ended December 31,
	2010
Balance at beginning of period	$	(1,688	)
Realized and unrealized gains (losses)
Reclassified into interest expense for settled contracts	2,112
Included in other comprehensive income (loss)	(424		)
Balance at end of period	$	—

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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