2.2.0.25falsefalse0509 - Disclosure - Operating Segment Information (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_OperatingSegmentInformationTablesAbstractglffalsenadurationOperating Segment Information.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalsefalsefalse | Otherxbrli:stringItemTypestringOperating Segment Information.falsefalse
3false0us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlockus-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_note9_table1 - us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock-->
<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="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 nowrap="nowrap" align="center" colspan="2"><b>North</b></td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"><b>Southeast</b></td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"> </td>
<td> </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"><b>Sea</b></td>
<td style="border-bottom: 1px solid #000000"> </td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Asia</b></td>
<td style="border-bottom: 1px solid #000000"> </td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Americas</b></td>
<td style="border-bottom: 1px solid #000000"> </td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Other</b></td>
<td style="border-bottom: 1px solid #000000"> </td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><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> </td>
<td> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2"><i>(In thousands)</i></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px"><b>Quarter Ended March 31, 2011</b>
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Revenue
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">35,399</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">15,535</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">30,355</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">81,289</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Direct operating expenses
</div></td>
<td> </td>
<td> </td>
<td align="right">20,715</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,861</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">20,741</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">44,317</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Drydock expense
</div></td>
<td> </td>
<td> </td>
<td align="right">3,070</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">185</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">3,269</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">6,524</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">General and administrative
</div></td>
<td> </td>
<td> </td>
<td align="right">3,234</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">674</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,270</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">5,245</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">11,423</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Depreciation expense
</div></td>
<td> </td>
<td> </td>
<td align="right">4,787</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,451</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">7,106</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">332</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">14,676</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">(Gain) loss on sale of assets
</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">10</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">10</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td> </td>
<td> </td>
<td colspan="19" align="left" style="border-top: 1px solid #000000">         </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Operating income (loss)
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">3,593</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">9,364</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="left">$</td>
<td align="right">(3,041</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="left">$</td>
<td align="right">(5,577</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td align="left">$</td>
<td align="right">4,339</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td> </td>
<td> </td>
<td colspan="19" align="left" style="border-top: 3px double #000000">         </td>
</tr>
<tr valign="bottom"><!-- Blank Space -->
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px"><b>Quarter Ended March 31, 2010</b>
</div></td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Revenue
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">35,275</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">15,827</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">33,549</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">84,651</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Direct operating expenses
</div></td>
<td> </td>
<td> </td>
<td align="right">20,169</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,324</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">20,576</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">43,069</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Drydock expense
</div></td>
<td> </td>
<td> </td>
<td align="right">2,030</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">1,945</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,989</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">—</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">6,964</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">General and administrative
</div></td>
<td> </td>
<td> </td>
<td align="right">2,820</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">599</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">2,187</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">6,125</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">11,731</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Depreciation expense
</div></td>
<td> </td>
<td> </td>
<td align="right">4,660</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">1,965</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">7,128</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">222</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">13,975</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td> </td>
<td> </td>
<td colspan="19" align="left" style="border-top: 1px solid #000000">         </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Operating income (loss)
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">5,596</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">8,994</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">669</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="left">$</td>
<td align="right">(6,347</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td align="left">$</td>
<td align="right">8,912</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td> </td>
<td> </td>
<td colspan="19" align="left" style="border-top: 3px double #000000">         </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 may be used to capture the complete disclosure about the profit or loss and total assets for each reportable segment, as a single block of text. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 27, 28
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12Operating Segment Information (Tables)UnKnownUnKnownUnKnownUnKnownfalsetrue