2.4.0.81070 - Disclosure - OIL AND GAS PROPERTIEStruefalsefalse1false
falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0000813779duration2013-01-01T00:00:002013-06-30T00:00:001true
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2us-gaap_AssetImpairmentChargesTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel| 1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;">
<p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">7.</font></b><font style="FONT-SIZE: 10pt;" size="2">            </font> <b><font style="FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">OIL AND GAS PROPERTIES</font></b></p>
<p style="MARGIN: 0in 0in 0pt;"> </p>
<p style="TEXT-INDENT: 0.25in; MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">The following table sets forth the composition of impairment expenses:</font></p>
<p style="MARGIN: 0in 0in 0pt;"> </p>
<table style="text-align:left;WIDTH: 100%; BORDER-COLLAPSE: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="41%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 26.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="26%" colspan="5">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">Three months ended</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 26.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="26%" colspan="5">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">Six months ended</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="41%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 26.5%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="26%" colspan="5">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">June 30,</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 26.5%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="26%" colspan="5">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">June 30,</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="41%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">2013</font></b></p></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">2012</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">2013</font></b></p></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">2012</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="41%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Impairments of unproved properties</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">827,677</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">806,067</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">1,645,415</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%" colspan="2">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">1,482,541</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="41%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">$</font></p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.7%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">827,677</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">$</font></p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.7%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">806,067</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">$</font></p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.7%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">1,645,415</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">$</font></p></td>
<td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.7%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">1,482,541</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td></tr>
<tr style="padding:0;">
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="307"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="10"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="80"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="10"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="80"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="10"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="80"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="10"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="80"></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="7"></td></tr></table>
<p style="TEXT-INDENT: 19.45pt; MARGIN: 0in 0in 0pt;"> </p>
<p style="TEXT-INDENT: 0.25in; MARGIN: 0in 0in 0pt;"><i><font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">2013 Asset Impairments.</font></i> <font style="FONT-SIZE: 10pt;" size="2">Non-cash i</font><font style="FONT-SIZE: 10pt;" size="2">mpairments of unproved properties are related to individually insignificant acreage.  There were no impairments or abandonments of proved properties for the three and six months ended June 30, 2013.</font></p>
<p style="TEXT-INDENT: 0.25in; MARGIN: 0in 0in 0pt;"> </p>
<p style="TEXT-INDENT: 0.25in; MARGIN: 0in 0in 0pt;"><i><font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">2012 Asset Impairments.</font></i> <font style="FONT-SIZE: 10pt;" size="2">Non-cash impairments of unproved properties are related to individually insignificant acreage.  There were no impairments or abandonments of proved properties</font> <font style="FONT-SIZE: 10pt;" size="2">for the three and six months ended June 30, 2012.</font></p>
<p style="MARGIN: 0in 0in 0pt;"> </p>
</div>falsefalsefalse | nonnum:textBlockItemTypenaThe entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.No definition available.false0
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