XML 49 R59.htm IDEA: XBRL DOCUMENT v2.4.1.9
Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Sandhill [Member]    
Related Party Transaction [Line Items]    
Related party transaction, revenues $ 699us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gel_SandhillMember		 [1] $ 655us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gel_SandhillMember		 [1]
Chief Executive Officer [Member]    
Related Party Transaction [Line Items]    
Related party transaction, expenses $ 195us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember		 $ 150us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
Sandhill Group Llc [Member]    
Related Party Transaction [Line Items]    
Percentage of interest held 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gel_SandhillGroupLlcMember		  
[1] We own a 50% interest in Sandhill Group, LLC.