Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Measurements [Abstract]

Schedule Of Fair Value Of Financial Assets And Liabilities By Level

As of December 31, 2013		Total		Level 1		Level 2		Level 3
Assets from commodity derivative instruments	$	89,616	$	-	$	89,616	$	-
Available for sale securities:
Equities		3,967		3,967		-		-
Mutual funds		11,639		11,639		-		-
Exchange traded funds		3,140		3,140		-		-
	$	108,362	$	18,746	$	89,616	$	-
Liabilities from commodity derivative instruments	$	7,093	$	-	$	7,093	$	-
Liabilities from interest rate derivative instruments		10,391		-		10,391		-
	$	17,484	$	-	$	17,484	$	-
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	$	-