2.4.0.81060 - Disclosure - Asset Retirement Obligationstruefalsefalse1false
falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001168054duration2013-01-01T00:00:002013-06-30T00:00:001true
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2us-gaap_AssetRetirementObligationDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel| 1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;">
<p style="TEXT-INDENT: -0.25in; MARGIN: 0in 0in 0pt 0.25in;"><b><i><font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">6.</font></i></b><b><i><font style="FONT-STYLE: italic; FONT-SIZE: 3pt; FONT-WEIGHT: bold;" size="1">             </font></i></b> <b><i><font style="FONT-STYLE: italic; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">Asset Retirement Obligations</font></i></b></p>
<p style="TEXT-INDENT: -0.25in; MARGIN: 0in 0in 0pt 0.25in;"> </p>
<p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">We recognize the fair value of liabilities for retirement obligations associated with tangible long-lived assets in the period in which there is a legal obligation associated with the retirement of such assets and the amount can be reasonably estimated.  The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset.  This liability includes costs related to the abandonment of wells, the removal of facilities and equipment, and site restorations.  Subsequent to initial measurement, the asset retirement liability is required to be accreted each period.  If the fair value of a recorded asset retirement obligation changes, a revision is recorded to both the asset retirement obligation and the asset retirement capitalized cost.  Capitalized costs are included as a component of the DD&A calculations.</font></p>
<p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt;"> </p>
<p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">The following table reflects the components of the change in the carrying amount of the asset retirement obligation for the six months ended June 30, 2013:</font></p>
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p>
<table style="text-align:left;WIDTH: 80%; BORDER-COLLAPSE: collapse; MARGIN-LEFT: 0.75in;" border="0" cellspacing="0" cellpadding="0" width="80%">
<tr style="padding:0;">
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<p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">(in thousands)</font></b></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="3%">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 15%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="15%" colspan="2">
<p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; 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="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Asset retirement obligation at January 1, 2013</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="3%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" 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="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 13.7%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="13%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">185,138</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; 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: 80.62%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 20pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Liabilities incurred</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="3%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 15%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="15%" 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">2,443</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; 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="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 20pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Liability settlements and disposals</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="3%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 15%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="15%" 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">(28,360</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" 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></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 20pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Accretion expense</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="3%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 15%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="15%" 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">4,136</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; 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="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 20pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Revisions of estimated liabilities</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="3%">
<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: 15%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="15%" 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">(6,524</font></p></td>
<td style="PADDING-BOTTOM: 0.375pt; PADDING-LEFT: 0in; WIDTH: 1.26%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" 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></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Asset retirement obligation at June 30, 2013</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="3%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td>
<td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 15%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="15%" 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">156,833</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; 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="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Less current obligation</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="3%">
<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: 15%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="15%" 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">(48,156</font></p></td>
<td style="PADDING-BOTTOM: 0.375pt; PADDING-LEFT: 0in; WIDTH: 1.26%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" 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></tr>
<tr style="padding:0;">
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 80.62%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="80%">
<p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Long-term asset retirement obligation</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 3.12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="3%">
<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: 13.7%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="13%">
<p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">108,677</font></p></td>
<td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.26%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">
<p style="MARGIN: 0in 0in 0pt;"> </p></td></tr></table>
<p style="MARGIN: 0in 0in 0pt;"> </p>
</div>falsefalsefalse | nonnum:textBlockItemTypenaThe entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 143
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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