2.4.0.8013 - Disclosure - Note 6 - Commitments and Contingenciestruefalsefalse1false falsefalsec8_From1Jan2013To30Jun2013http://www.sec.gov/CIK0001030749duration2013-01-01T00:00:002013-06-30T00:00:001true 1glf_CommitmentsAndContingenciesDisclosureTextBlockAbstractglf_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments and Contingencies Disclosure [Text Block]2false 2us-gaap_CommitmentsAndContingenciesDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00 (6)           COMMITMENTS AND CONTINGENCIES We have contingent liabilities and future claims for which we have made estimates of the amount of the eventual cost to liquidate these liabilities or claims. These liabilities and claims may involve threatened or actual litigation where damages have not been specifically quantified but we have made an assessment of our exposure and recorded a provision in our accounts for the expected loss. Other claims or liabilities, including those related to taxes in foreign jurisdictions, may be estimated based on our experience in these matters and, where appropriate, the advice of outside counsel or other outside experts. Upon the ultimate resolution of the uncertainties surrounding our estimates of contingent liabilities and future claims, our future reported financial results will be impacted by the difference, if any, between our estimates and the actual amounts paid to settle the liabilities. In addition to estimates related to litigation and tax liabilities, other examples of liabilities requiring estimates of future exposure include contingencies arising out of acquisitions and divestitures. Our contingent liabilities are based on the most recent information available to us regarding the nature of the exposure. Such exposures change from period to period based upon updated relevant facts and circumstances, which can cause our estimates to change. In the recent past, our estimates for contingent liabilities have been sufficient to cover the actual amount of our exposure. We do not believe that the outcome of these matters will have a material adverse effect on our business, financial condition, or results of operations. In 2011, we were made aware that a Brazilian state in which we have operated vessels has asserted that certain companies could be assessed for state import taxes with respect to vessels that have operated within Brazilian coastal waters. We have neither been formally notified nor assessed with this tax by the Brazilian state. No accrual has been recorded as of June 30, 2013 for any liabilities associated with a possible future assessment. We can’t predict whether any such tax assessment may be made in the future. falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for commitments and contingencies.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308 false0Commitments and Contingencies Disclosure [Text Block]falseNote 6 - Commitments and ContingenciesUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.gulfmark.com/role/Note6CommitmentsandContingencies12