2.4.0.82125100 - Disclosure - Fair Valuetruefalsefalse1false falsefalseD2013Q3YTDhttp://www.sec.gov/CIK0001181749duration2012-11-01T00:00:002013-07-31T00:00:001true 1gfe_FairValueAbstractgfe_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value [Abstract]2false 2us-gaap_FairValueDisclosuresTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">FAIR VALUE</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following table provides information on those derivative assets measured at fair value on a recurring basis at July 31, 2013:</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:92.1875%;border-collapse:collapse;text-align:left;"><tr><td colspan="21" rowspan="1"></td></tr><tr><td width="21%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="14%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="13%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="10%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="10%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="2%" rowspan="1" colspan="1"></td><td width="12%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td></tr><tr><td rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="4" rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Carrying Amount in Balance Sheet</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">July 31, 2013</font></div></td><td colspan="4" rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Fair Value</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">July 31, 2013</font></div></td><td colspan="12" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Fair Value Measurement Using</font></div></td></tr><tr><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Quoted Prices in Active Markets</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 1)</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Significant Other Observable Inputs</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 2)</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Significant unobservable inputs</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 3)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Financial Assets:</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="4" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Commodity derivative instruments</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">688</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">688</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">688</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following table provides information on those derivative liabilities measured at fair value on a recurring basis at October 31, 2012:</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:91.796875%;border-collapse:collapse;text-align:left;"><tr><td colspan="16" rowspan="1"></td></tr><tr><td width="22%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="16%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="16%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="12%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="11%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="13%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td></tr><tr><td rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Carrying Amount in Balance Sheet</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">October 31, 2012</font></div></td><td colspan="3" rowspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Fair Value</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">October 31, 2012</font></div></td><td colspan="9" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Fair Value Measurement Using</font></div></td></tr><tr><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Quoted Prices in Active Markets</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 1)</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Significant Other Observable Inputs</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 2)</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Significant unobservable inputs</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Level 3)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Financial Liabilities:</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Commodity derivative instruments</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#ccffff;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(45,563</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#ccffff;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(45,563</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#ccffff;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(45,563</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#ccffff;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#ccffff;border-left:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#ccffff;border-right:1px solid #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">GFE determines the fair value of commodity derivative instruments by obtaining fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes and live trading levels from the Chicago Board of Trade market and New York Mercantile Exchange.</font></div></div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. 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