2.2.0.25falsefalse10301 - Disclosure - Derivatives and Fair Value Measurementstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $Duration_1_1_2011_To_3_31_2011http://www.sec.gov/CIK0001060990duration2011-01-01T00:00:002011-03-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_CreditRiskDerivativesAtFairValueNetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDerivatives and Fair Value Measurements3false0us-gaap_FairValueMeasurementInputsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <font size="2" class="_mt"> </font> <div> <div style="font-family: 'Times New Roman',Times,serif;"> <div style="margin-top: 12pt; font-size: 10pt;" align="left"><b>3. DERIVATIVES AND FAIR VALUE MEASUREMENTS</b> </div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The following table identifies our derivative instruments where estimated fair value is based upon the use of "Level 2" inputs at March 31, 2011 and December 31, 2010: </div> <div align="center"> <table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="50%"> <tr valign="bottom"><td width="76%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>March 31,</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>December 31,</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2011</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2010</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="6" nowrap="nowrap" align="center">(in thousands)</td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Commodity contracts</div></td> <td> </td> <td align="right">$ </td> <td align="right">96,203</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">146,762</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 30px;">Total</div></td> <td> </td> <td align="right">$ </td> <td align="right">96,203</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">146,762</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr></table></div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The fair value of all derivative instruments included in these disclosures was estimated using prices quoted in active markets for the periods covered by the derivatives and the value reported by counterparties.  Estimates were determined by applying the net differential between the prices in each derivative and market prices for future periods to the amounts stipulated in each contract to arrive at an estimated future value.  This estimated future value was discounted on each contract at rates commensurate with federal treasury instruments with similar contractual lives.  </div> <div style="margin-top: 12pt; font-size: 10pt;" align="left"><i>Commodity Price Derivatives</i> </div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     As of March 31, 2011, we had price collars and swaps hedging our anticipated natural gas and NGL production as follows: </div> <div align="center"> <table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="23%"> <tr valign="bottom"><td width="63%"> </td> <td width="5%"> </td> <td width="2%"> </td> <td width="5%"> </td> <td width="2%"> </td> <td width="5%"> </td> <td width="2%"> </td> <td width="5%"> </td> <td width="2%"> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td nowrap="nowrap" align="center"><b>Production</b></td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="6" nowrap="nowrap" align="center"><b>Daily Production</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td style="border-bottom: #000000 1px solid;" nowrap="nowrap" align="center"><b>Year</b></td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Gas</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>NGL</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center">MMcfd</td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center">MBbld</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td nowrap="nowrap" align="center"><b>2011</b></td> <td> </td> <td> </td> <td align="right">190</td> <td> </td> <td> </td> <td> </td> <td align="right">10.5</td> <td> </td></tr> <tr valign="bottom"><td nowrap="nowrap" align="center"><b>2012</b></td> <td> </td> <td> </td> <td align="right">130</td> <td> </td> <td> </td> <td> </td> <td align="right">2.0</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td nowrap="nowrap" align="center"><b>2013</b></td> <td> </td> <td> </td> <td align="right">70</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td></tr> <tr valign="bottom"><td nowrap="nowrap" align="center"><b>2014-2015</b></td> <td> </td> <td> </td> <td align="right">30</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td></tr></table></div> <div style="margin-top: 12pt; font-size: 10pt;" align="left"><i>Interest Rate Derivatives</i> </div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     In 2010, we executed early settlements of our interest rate swaps that were designated as fair value hedges of our senior notes due 2015 and our senior subordinated notes.  We received cash of $41.5 million in the settlements, including $10.7 million for interest previously accrued and earned.  Upon the early settlements, we recorded the resulting gain as a fair value adjustment to our debt and began to recognize the deferred gain of $30.8 million as a reduction of interest expense over the lives of our senior notes due 2015 and our senior subordinated notes.  </div></div> <div style="font-family: 'Times New Roman',Times,serif;"> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The remaining $26.4 million deferral of the 2010 early settlements from all interest rate swaps will continue to be recognized as a reduction of interest expense over the life of the associated underlying debt instruments currently scheduled as follows: </div> <div align="center"> <table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="30%"> <tr valign="bottom"><td width="53%"> </td> <td width="40%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td nowrap="nowrap" align="center">(In thousands)</td> <td> </td></tr> <tr style="font-size: 0pt;" valign="bottom"><td style="border-bottom: #000000 1px solid;" colspan="4" nowrap="nowrap" align="center"> </td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td nowrap="nowrap" align="center">2011</td> <td> </td> <td align="right">$ </td> <td align="right">3,711</td> <td> </td></tr> <tr valign="bottom"><td nowrap="nowrap" align="center">2012</td> <td> </td> <td> </td> <td align="right">5,315</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td nowrap="nowrap" align="center">2013</td> <td> </td> <td> </td> <td align="right">5,769</td> <td> </td></tr> <tr valign="bottom"><td nowrap="nowrap" align="center">2014</td> <td> </td> <td> </td> <td align="right">6,261</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td nowrap="nowrap" align="center">2015</td> <td> </td> <td> </td> <td align="right">4,824</td> <td> </td></tr> <tr valign="bottom"><td nowrap="nowrap" align="center">2016</td> <td> </td> <td> </td> <td align="right">569</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td align="right">$ </td> <td align="right">26,449</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr></table></div> <div style="margin-top: 12pt; font-size: 10pt;" align="left"><i>Fair Value Disclosures</i> </div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The estimated fair value of our derivative instruments at March 31, 2011 and December 31, 2010 were as follows: </div> <div align="center"> <table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="75%"> <tr valign="bottom"><td width="52%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="6" nowrap="nowrap" align="center"><b>Asset Derivatives</b></td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="6" nowrap="nowrap" align="center"><b>Liability Derivatives</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>March 31,</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>December 31,</b></td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>March 31,</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>December 31,</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2011</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2010</b></td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2011</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2010</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="6" nowrap="nowrap" align="center">(In thousands)</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td colspan="6" nowrap="nowrap" align="center">(In thousands)</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Derivatives designated as hedges:</div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 30px;">Commodity contracts reported in:</div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 45px;">Current derivative assets</div></td> <td> </td> <td align="right">$ </td> <td align="right">82,720</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">97,863</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td align="right">$ </td> <td align="right">21,588</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">8,658</td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 45px;">Noncurrent derivative assets</div></td> <td> </td> <td> </td> <td align="right">41,149</td> <td> </td> <td> </td> <td> </td> <td align="right">63,419</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td align="right">3,141</td> <td> </td> <td> </td> <td> </td> <td align="right">5,862</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 45px;">Current derivative liabilities</div></td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td align="right">1,965</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 45px;">Noncurrent derivative liabilities</div></td> <td> </td> <td> </td> <td align="right">2,192</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td align="right">3,164</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 45px;"> </div></td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Total derivatives designated as hedges</div></td> <td> </td> <td align="right">$ </td> <td align="right">126,061</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">161,282</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td align="right">$ </td> <td align="right">29,858</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">14,520</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Derivatives not designated as hedges:</div></td> <td> </td> <td align="right">$ </td> <td align="right">-</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">-</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td align="right">$ </td> <td align="right">-</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">-</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Total derivatives</div></td> <td> </td> <td align="right">$ </td> <td align="right">126,061</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">161,282</td> <td> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td align="right">$ </td> <td align="right">29,858</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">14,520</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td style="border-right: #000000 3px solid;"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr></table></div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The decrease in carrying value of our commodity price derivatives since December 31, 2010 principally resulted from the overall increase in market prices for natural gas relative to the prices in our open derivative instruments and, to a lesser degree, monthly settlements received during 2011.  </div> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     The changes in the carrying value of our derivatives for the three months ended March 31, 2011 and 2010 are presented below: </div> <div align="center"> <table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="80%"> <tr valign="bottom"><td width="40%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="18" nowrap="nowrap" align="center"><b>For the Three Months Ended March 31,</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>2011</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="14" nowrap="nowrap" align="center"><b>2010</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>Cash Flow</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>Gas Purchase</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>Fair Value</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"><b>Cash Flow</b></td> <td> </td> <td> </td> <td colspan="2" nowrap="nowrap" align="center"> </td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Derivatives</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Commitment</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Derivatives</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Derivatives</b></td> <td> </td> <td> </td> <td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"><b>Total</b></td> <td> </td></tr> <tr style="font-size: 8pt;" valign="bottom"><td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td colspan="14" nowrap="nowrap" align="center">(In thousands)</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Derivative fair value at beginning of period</div></td> <td> </td> <td align="right">$ </td> <td align="right">146,762</td> <td> </td> <td> </td> <td nowrap="nowrap" align="right">$</td> <td align="right">(6,625</td> <td nowrap="nowrap">)</td> <td> </td> <td align="right">$ </td> <td align="right">4,108</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">107,881</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">105,364</td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Change in amounts receivable/payable-net</div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(218</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(4,997</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(2,223</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(7,220</td> <td nowrap="nowrap">)</td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Net settlements reported in revenue</div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(23,782</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(24,557</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(24,557</td> <td nowrap="nowrap">)</td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Net settlements reported in interest expense</div></td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(2,296</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(2,296</td> <td nowrap="nowrap">)</td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Cash settlements reported in long-term debt</div></td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(13,934</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(13,934</td> <td nowrap="nowrap">)</td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Unrealized change in fair value of Gas Purchase Commitment reported in costs of purchased gas</div></td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(16,638</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(16,638</td> <td nowrap="nowrap">)</td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Change in fair value of effective interest swaps</div></td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">12,089</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">12,089</td> <td> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Ineffectiveness reported in other revenue</div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(53</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">1,395</td> <td> </td> <td> </td> <td> </td> <td align="right">1,395</td> <td> </td></tr> <tr style="background: #cceeff;" valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Unrealized gains (losses) reported in OCI</div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(26,506</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">-</td> <td> </td> <td> </td> <td> </td> <td align="right">148,222</td> <td> </td> <td> </td> <td> </td> <td align="right">148,222</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 1px solid;" colspan="3" nowrap="nowrap" align="right"> </td></tr> <tr valign="bottom"><td> <div style="text-indent: -15px; margin-left: 15px;">Derivative fair value at end of period</div></td> <td> </td> <td align="right">$ </td> <td align="right">96,203</td> <td> </td> <td> </td> <td nowrap="nowrap" align="right">$</td> <td align="right">(23,263</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="right">$</td> <td align="right">(5,030</td> <td nowrap="nowrap">)</td> <td> </td> <td align="right">$ </td> <td align="right">230,718</td> <td> </td> <td> </td> <td align="right">$ </td> <td align="right">202,425</td> <td> </td></tr> <tr style="font-size: 1px;"><td> <div style="text-indent: -15px; margin-left: 15px;"> </div></td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td> <td> </td> <td style="border-top: #000000 3px double;" colspan="3" nowrap="nowrap" align="right"> </td></tr></table></div></div> <div style="font-family: 'Times New Roman',Times,serif;"> <div style="margin-top: 6pt; font-size: 10pt;" align="left">     Gains and losses from the effective portion of derivative assets and liabilities held in AOCI expected to be reclassified into earnings during the following twelve months would result in a gain of $41.0 million net of income taxes.  Hedge derivative ineffectiveness resulted in net losses of $0.1 million and net gains of $1.4 million for the three months ended March 31, 2011 and 2010, respectively.  </div></div></div> </div>3. DERIVATIVES AND FAIR VALUE MEASUREMENTS      The following table identifies our derivative instruments where estimated fair valuefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis element represents the disclosure related to the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 falsefalseDerivatives and Fair Value Measurements12Derivatives and Fair Value MeasurementsUnKnownUnKnownUnKnownUnKnownfalsetrue