Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis

The following table sets forth the Company’s assets and liabilities that are measured at fair value on a recurring basis at the date indicated:

	Fair Value as of		Fair Value Measurements at June 30, 2012 Using Fair Value Hierarchy
	June 30, 2012		Level 1		Level 2		Level 3
Assets:
Commodity derivatives	$	14,890	$	—	$	14,890	$	—
Total	$	14,890	$	—	$	14,890	$	—
Liabilities:
Commodity derivatives	$	22,564	$	—	$	22,564	$	—
Interest-rate swap derivatives	84,746		—		84,746		—
Total	$	107,310	$	—	$	107,310	$	—