Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2011

Notes to Financial Statements [Abstract]

ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock

		Fair Value		Fair Value Measurements at June 30, 2011
		as of		Using Fair Value Hierarchy
		June 30, 2011		Level 1		Level 2		Level 3
		(In thousands)
Assets:
	Commodity derivatives	$	9	$	-	$	9	$	-
	Long-term investments		1,027		1,027		-		-
	Total	$	1,036	$	1,027	$	9	$	-
Liabilities:
	Commodity derivatives	$	34,118	$	-	$	34,118	$	-
	Interest-rate swap derivatives		34,392		-		34,392		-
	Total	$	68,510	$	-	$	68,510	$	-