Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Measurements [Abstract]

Schedule Of Fair Value Of Financial Assets And Liabilities By Level

As of September 30, 2013		Total		Level 1		Level 2		Level 3
Assets from commodity derivative instruments	$	93,469	$	-	$	93,469	$	-
Available for sale securities:
Equities		3,645		3,645		-		-
Mutual funds		8,584		8,584		-		-
Municipal bond		521		-		521		-
Exchange traded funds		3,253		3,253		-		-
Total available for sale securities		16,003		15,482		521		-
	$	109,472	$	15,482	$	93,990	$	-
Liabilities from commodity derivative instruments	$	13,328	$	-	$	13,328	$	-
Liabilities from interest rate derivative instruments		11,225		-		11,225		-
	$	24,553	$	-	$	24,553	$	-
As of December 31, 2012		Total		Level 1		Level 2		Level 3
Assets from commodity derivative instruments	$	122,143	$	-	$	122,143	$	-
	$	122,143	$	-	$	122,143	$	-
Liabilities from commodity derivative instruments	$	13,484	$	-	$	13,484	$	-
Liabilities from interest rate derivative instruments		12,236		-		12,236		-
	$	25,720	$	-	$	25,720	$	-