2.2.0.25falsefalse0207 - Disclosure - Fair Value Measurementstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $Jan-01-2011_Mar-31-2011http://www.sec.gov/CIK0001030749duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0glf_FairValueMeasurementsAbstractglffalsenadurationFair Value Measurements.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringFair Value Measurements.falsefalseFair Value Measurements [Abstract]3false0us-gaap_FairValueDisclosuresTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10pt; margin-top: 12pt"><b>(7) FAIR VALUE MEASUREMENTS</b> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     Each asset and liability required to be carried at fair value is classified under one of the following criteria: </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">Level 1: Quoted market prices in active markets for identical assets or liabilities </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">Level 3: Unobservable inputs that are not corroborated by market data </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     We have a fixed-for-floating interest rate swap agreement that has the effect of fixing the LIBOR interest rate component on $100.0 million of the outstanding balance on the Facility Agreement. The fixed rate component of the swap is set at 4.145% and the swap matures with the Facility Agreement on December 31, 2012. The interest rate swap is accounted for as a cash flow hedge. The consolidated balance sheet contains cash flow hedges within other long term liabilities, reflecting the fair value of the interest rate swap which was $5.9 million at March 31, 2011. For the three-month period ended March 31, 2011, $0.3 million related to this interest rate swap was reclassified from other comprehensive income to interest expense. We expect to reclassify $1.8 million of deferred loss related to this interest rate swap to interest expense during the next 12 months. We recognize the fair value of our derivative swaps as a Level 2 valuation. We determined the fair value of our interest rate swap based on the contractual fixed rate in the swap agreement and the forward curve of three month LIBOR supplied by the bank as of March 31, 2011. </div>   </div>  <div style="font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The following table presents information about our assets (liabilities) measured at fair value on a recurring basis as of March 31, 2011, and indicates the fair value hierarchy we utilized to determine such fair value (in millions). </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 1</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 2</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 3</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Cash Flow Hedges </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.9</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The following table presents information about our assets (liabilities) measured at fair value on a recurring basis as of December 31, 2010, and indicates the fair value hierarchy we utilized to determine such fair value (in millions). </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <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="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 nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 1</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 2</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Level 3</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Cash Flow Hedges </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6.8</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div>  <!-- Begin Block Tagged NotefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15B -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 17-22, 27, 28 falsefalseFAIR VALUE MEASUREMENTS12Fair Value MeasurementsUnKnownUnKnownUnKnownUnKnownfalsetrue