FAIR VALUE MEASUREMENTS (Derivative Financial Instruments) (Details) (Cashless Collar Contract [Member], USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2013
|
Jun. 10, 2013
bbl
|
May 06, 2013
bbl
|
Apr. 02, 2013
bbl
|
Mar. 07, 2013
bbl
|
Feb. 07, 2013
bbl
|
Jan. 08, 2013
bbl
|
Dec. 07, 2012
bbl
|
Nov. 09, 2012
bbl
|
Oct. 04, 2012
bbl
|
Sep. 11, 2012
bbl
|
Aug. 03, 2012
bbl
|
May 03, 2012
bbl
|
Dec. 28, 2012
Cap $117.80 [Member]
bbl
|
Dec. 28, 2012
Cap $116.25 [Member]
bbl
|
Jun. 30, 2013
Trade Date September 11, 2012 [Member]
|
Jun. 30, 2013
Trade Date December 7, 2012 [Member]
|
Jun. 30, 2013
Trade Date, March 7, 2013 [Member]
|
Jun. 30, 2013
Trade Date, May 6, 2013 [Member]
|
Jun. 30, 2013
Trade Date May 3, 2012 [Member]
|
Jun. 30, 2013
Trade Date August 3, 2012 [Member]
|
Jun. 30, 2013
Trade Date October 4, 2012 [Member]
|
Jun. 30, 2013
Trade Date November 9, 2012 [Member]
|
Jun. 30, 2013
Trade Date January 8, 2013 [Member]
|
Jun. 30, 2013
Trade Date, February 7, 2012 [Member]
|
Jun. 30, 2013
Trade Date, April 2, 2013 [Member]
|
Jun. 30, 2013
Trade Date, June 10, 2013 [Member]
|
Jun. 30, 2013
Trade Date, December 28, 2012 [Member]
Cap $117.80 [Member]
|
Jun. 30, 2013
Trade Date, December 28, 2012 [Member]
Cap $116.25 [Member]
|
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Derivative [Line Items] | |||||||||||||||||||||||||||||
Barrels of oil per Month | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | 148,810 | |||||||||||||||
Floor | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | |||||||||||||||
Cap | 120.65 | 122.00 | 130.00 | 125.75 | 134.70 | 129.00 | 124.70 | 130.00 | 127.50 | 137.50 | 130.00 | 141.25 | 117.80 | 116.25 | |||||||||||||||
Assets, Fair Value | $ 626 | $ 23 | $ 25 | $ 71 | $ 56 | $ 0 | $ 7 | $ 23 | $ 49 | $ 74 | $ 118 | $ 125 | $ 55 | ||||||||||||||||
Liabilities, Fair Value | $ 39 | $ 26 | $ 13 |