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Debt (Schedule Of Obligations Under Debt Arrangements) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Debt Instrument [Line Items] |  |
Senior secured credit facility | $ 550,400 us-gaap_SecuredLongTermDebt | $ 582,800 us-gaap_SecuredLongTermDebt
7.875% senior unsecured notes (including unamortized premium of $639 and $772 in 2014 and 2013, respectively) | 1,050,639 us-gaap_UnsecuredLongTermDebt | 700,772 us-gaap_UnsecuredLongTermDebt
Total long-term debt | 1,601,039 us-gaap_LongTermDebtNoncurrent | 1,283,572 us-gaap_LongTermDebtNoncurrent
Unamortized premium | 639 us-gaap_DebtInstrumentUnamortizedPremium | 772 us-gaap_DebtInstrumentUnamortizedPremium
Seven Point Eight Seventy Five Percentage Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
7.875% senior unsecured notes (including unamortized premium of $639 and $772 in 2014 and 2013, respectively) | 350,639 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_SevenPointEightSeventyFivePercentageSeniorUnsecuredNotesMember | 350,772 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_SevenPointEightSeventyFivePercentageSeniorUnsecuredNotesMember
Five Point Seventy Five Percentage Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
7.875% senior unsecured notes (including unamortized premium of $639 and $772 in 2014 and 2013, respectively) | 350,000 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_FivePointSeventyFivePercentageSeniorUnsecuredNotesMember | 350,000 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_FivePointSeventyFivePercentageSeniorUnsecuredNotesMember
Five Point Six Two Five Percentage Senior Unsecured Notes [Member] [Domain] |  |
Debt Instrument [Line Items] |  |
7.875% senior unsecured notes (including unamortized premium of $639 and $772 in 2014 and 2013, respectively) | $ 350,000 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_FivePointSixTwoFivePercentageSeniorUnsecuredNotesMemberDomain | $ 0 us-gaap_UnsecuredLongTermDebt / us-gaap_LineOfCreditFacilityAxis = gel_FivePointSixTwoFivePercentageSeniorUnsecuredNotesMemberDomain

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- Definition The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + References 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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