2.2.0.25falsefalse0506 - Disclosure - Derivative Financial Instruments (Tables)truefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 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_DerivativeFinancialInstrumentsTablesAbstractglffalsenadurationDerivative Financial Instruments.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalsefalsefalse | Otherxbrli:stringItemTypestringDerivative Financial Instruments.falsefalse
3false0us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: GLF-20110331_note6_table1 - us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="20%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
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<td width="1%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
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<td width="5%"> </td>
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<td width="3%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="3%"> </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="14" style="border-bottom: 1px solid #000000"><b>Asset Derivatives</b></td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="14" style="border-bottom: 1px solid #000000"><b>Liability Derivatives</b></td>
<td> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000">March 31, 2011</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000">December 31, 2010</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000">March 31, 2011</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000">December 31, 2010</td>
<td> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Balance</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Balance</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Balance</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Balance</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"> </td>
<td> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td nowrap="nowrap" align="left"><b>Derivatives designed as</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Sheet</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Fair</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Sheet</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Fair</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Sheet</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Fair</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Sheet</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"> </td>
<td> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td nowrap="nowrap" align="left"><b>hedging instruments</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Location</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Value</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Location</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Value</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Location</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Value</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Location</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2">Fair Value</td>
<td> </td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr style="font-size: 1px">
<td> </td>
<td> </td>
<td colspan="7" align="left" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td colspan="7" align="left" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td colspan="7" align="left" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td colspan="7" align="left" style="border-top: 1px solid #000000"> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Interest rate swaps
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td colspan="3" align="center" nowrap="nowrap">Cash flow hedges</td>
<td> </td>
<td colspan="3" align="center"> 5,946</td>
<td> </td>
<td colspan="3" align="center" nowrap="nowrap">Cash flow hedges</td>
<td> </td>
<td colspan="3" align="center"> 6,807</td>
</tr>
<tr style="font-size: 1px">
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">5,946</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">6,807</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringThis element can be used as an alternative for disclosing the entity's tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position as a single block of text.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph a
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4false0us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: GLF-20110331_note6_table2 - us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="40%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Location of Gain or (Loss)</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7"><b>Amount of Gain or (Loss)</b></td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7"><b>Amount of Gain or (Loss)</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Reclassified from</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7"><b>Reclassified from</b></td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td nowrap="nowrap" align="left"><b>Derivatives in cash flow</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7"><b>Recognized in OCI on</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Accumulated OCI into</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7"><b>Accumulated OCI into</b></td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td nowrap="nowrap" align="left" style="border-bottom: 1px solid #000000"><b>hedging relationships</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7" style="border-bottom: 1px solid #000000"><b>Derivative</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000"><b>Income</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7" style="border-bottom: 1px solid #000000"><b>Income</b></td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2011</td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2010</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2011</td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2010</td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7">(in thousands)</td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="7">(in thousands)</td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Interest rate swaps
</div></td>
<td> </td>
<td nowrap="nowrap" align="right">$</td>
<td align="right">(98</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="right">$</td>
<td align="right">(1,650</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td colspan="3" nowrap="nowrap" align="center">Interest expense</td>
<td> </td>
<td nowrap="nowrap" align="right">$</td>
<td align="right">(752</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="right">$</td>
<td align="right">(660</td>
<td nowrap="nowrap">)</td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringSchedule of the location and amount of gains and losses reported in the statement of financial performance (or when applicable, the statement of financial position, for example, gains and losses initially recognized in other comprehensive income) on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph b
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